US20070114099A1 - Exciter ring for a brake rotor - Google Patents
Exciter ring for a brake rotor Download PDFInfo
- Publication number
- US20070114099A1 US20070114099A1 US11/624,548 US62454807A US2007114099A1 US 20070114099 A1 US20070114099 A1 US 20070114099A1 US 62454807 A US62454807 A US 62454807A US 2007114099 A1 US2007114099 A1 US 2007114099A1
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- US
- United States
- Prior art keywords
- body portion
- exciter ring
- ring
- exciter
- barrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/329—Systems characterised by their speed sensor arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
Definitions
- the present invention relates to braking systems for vehicles and, more particularly, to exciter rings for brake rotors.
- ABS Anti-lock braking systems
- braking can cause the wheel to “lock up” and stop rotating.
- the loss (reduction) of traction causes the truck or tractor-trailer to become unstable and directional control becomes difficult. This problem is of particular concern for heavy commercial vehicles, such as tractor-trailers, where the loss of control can cause the vehicle to jack-knife.
- ABS systems prevent wheel lock up by rapidly releasing and reapplying pressure to the brakes, to permit the skidding wheel to regain traction and steering.
- ABS systems typically comprise a speed sensor positioned adjacent to four or more wheels of the vehicle. Each speed sensor is connected to a controller that monitors the acceleration/deceleration of the wheels. When wheel lock up occurs, the controller detects the abnormally abrupt deceleration of the wheel and operates a valve in the corresponding brake line to release pressure on the brake until the wheel begins to accelerate again. Once the controller senses the wheel accelerate, the controller reverses the valve to allow brake pressure to increase once more. The controller repeats this cycle of acceleration/deceleration many times per second, such that braking is kept near, but does not exceed, the point at which the wheel locks up.
- Speed sensors typically operate by detecting the rate of rotation of the wheel hub, brake drum or brake rotor.
- the ring of teeth is commonly referred to as a tone ring or exciter ring, and the teeth are referred to as pulse teeth or exciter teeth.
- a typical exciter ring has about 80 to 120 teeth, depending on the size of the tire.
- the sensor typically comprises a magnetic pickup that is positioned adjacent to the exciter ring and measures the speed of the rotor by detecting the change in magnetic flux caused by the movement of the exciter teeth.
- ABS brake rotors also require additional steps of machining and inspection to ensure that the exciter teeth are uniform and that the exciter ring is not damaged.
- Brake rotors are typically cast in rough form and then machined to their finished dimensions.
- the numerous teeth of the exciter ring are difficult to cast and frequently have casting defects and imperfections which require the rotor to be scrapped.
- the exciter teeth are susceptible to damage caused by mishandling following the casting step of the manufacturing process, which increases the scrap rate.
- the exciter teeth must have uniform depth and clean surfaces for the speed sensors to function properly.
- the exciter ring requires an additional machining step to remove any imperfections that would interfere with the operation of the speed sensor.
- the exciter ring is integral with the brake rotor and unrepairable damage to the exciter ring results in discarding of the entire brake rotor. Replacing entire brake rotors due to damaged exciter rings can become very expensive. In addition, dirt and other debris accumulates on the exciter ring, which increases the rate of corrosion. As a result, the exciter ring is frequently the limiting factor in the life of a brake rotor.
- an exciter ring that is formed separately from an ABS brake rotor and is removably connectable to the brake rotor to facilitate relatively easy replacement of the exciter ring when the exciter ring becomes damaged.
- the invention provides a wheel assembly having a brake rotor including a barrel section having an interior surface defining a barrel cavity, a brake disc extending radially outwardly from the barrel section and defining a disc cavity in communication with the barrel cavity, and a projection extending from the interior surface of the barrel section into the barrel cavity, and an exciter ring formed separately from the brake rotor and being engagable with the projection within the barrel cavity to removably connect the exciter ring to the brake rotor.
- the invention provides an exciter ring formed separately from and removably connectable to a brake rotor, the exciter ring including a substantially cylindrical body portion having an inner surface and an outer surface, the inner surface defining a ring cavity, the body portion including a detent protruding outwardly from the outer surface and extending at least partially around the outer surface of the body portion, and a flange extending radially outwardly from the body portion and having a plurality of apertures therein.
- the invention provides a wheel assembly including a brake rotor having a projection, and an exciter ring formed separately from and removably connectable to the brake rotor, the exciter ring including a body portion and a flange extending radially outwardly from the body portion, the body portion having an inner surface and an outer surface, the inner surface defining a ring cavity, the body portion including a detent protruding outwardly from the outer surface and extending at least partially around the outer surface of the body portion, the flange having a plurality of apertures therein, wherein the detent is engagable with the projection to removably connect the exciter ring to the brake rotor.
- the invention provides a method of assembling a wheel assembly, the method including providing a brake rotor including a barrel section and a brake disc extending radially outwardly from the barrel section, the barrel section having an interior surface defining a barrel cavity and including a projection extending from the interior surface of the barrel section into the barrel cavity, the brake disc having a disc cavity, providing an exciter ring formed separately from the brake rotor, inserting the exciter ring through the disc cavity and into the barrel cavity, and engaging the exciter ring with the projection in the barrel section after inserting to removably connect the exciter ring to the brake rotor.
- FIG. 1 is a perspective view of a wheel assembly including an exciter ring embodying aspects of the invention.
- FIG. 2 is a front view of a wheel hub, a brake router and the exciter ring of the wheel assembly shown in FIG. 1 .
- FIG. 3 is a rear perspective view of the exciter ring shown in FIGS. 1 and 2 .
- FIG. 4 is a partial cross sectional view of the brake rotor and the exciter ring, taken along line 4 - 4 in FIG. 2 .
- FIG. 1 illustrates a wheel assembly 20 including a brake rotor 24 , a wheel hub 28 , a tire or wheel 32 , and an exciter ring 36 .
- a brake pad (not shown) or other braking mechanism is engagable with the brake rotor 24 to control the rotation of the wheel 32 .
- the wheel hub 28 is connected to the brake rotor 24 with a plurality of fasteners 40 and rotates with the brake rotor 24 .
- the brake rotor 24 defines a rotor cavity 44 and the wheel hub 28 defines a hub cavity (not shown) therethrough that are aligned when the brake rotor 24 and wheel hub 28 are connected.
- the wheel hub 28 includes a plurality of fasteners 48 , such as, for example a combination of lug nuts and lug bolts, for connecting the wheel 32 to the wheel hub 28 and facilitating rotation of the wheel 32 with the wheel hub 28 and the brake rotor 24 .
- a wheel axle (not shown) has an end thereof inserted through the aligned cavities of the brake rotor 24 and wheel hub 28 and connected to the wheel hub 28 .
- the wheel axle is connectable to a wheel assembly 20 at each end of the axle.
- the brake rotor 24 defines a central longitudinal axis 52 through a center thereof about which the brake rotor 24 and the exciter ring 36 are symmetrically oriented.
- the brake rotor 24 includes a brake disc 56 having an inboard portion 60 and an outboard portion 64 that are separated by a series of vent holes 68 , defined by spaced dividers 69 , for cooling the rotor 24 .
- An inboard brake surface 72 is formed on the inboard side of the inboard portion 60 .
- an outboard brake surface 76 is formed on the outboard side of the outboard portion 64 .
- the brake disc 56 has a disc cavity 78 that is defined in the brake disc 56 between the inboard brake surface 72 and an interior surface 100 (described in more detail below).
- the brake rotor 24 also includes a cylindrical barrel section 80 extending in the outboard direction from the brake disc 56 .
- the barrel section 80 is provided with a radial flange 84 extending radially inwardly that has a series of apertures for receiving the fasteners 40 for attaching the brake rotor 24 to the wheel hub 28 .
- the barrel section 80 also includes an interior barrel surface 88 that defines a barrel cavity 92 through the barrel section 80 .
- a barrel projection 96 extends inwardly from the interior barrel surface 88 toward a center of the barrel section 80 to provide a reduced diameter mouth to the barrel cavity 92 .
- the barrel projection 96 extends into the barrel cavity 92 substantially perpendicular to the longitudinal axis 52 .
- the barrel projection 96 is at least partially aligned with the outboard portion 64 of the brake disc 56 and is not between the inboard and outboard portions 60 , 64 of the brake disc 56 .
- the outboard portion 64 of the brake disc 56 forms an interior surface 100 adjacent the barrel section 80 , and a recess 104 is formed in the interior surface 100 near the barrel section 80 .
- the exciter ring 36 includes a body portion 108 substantially cylindrical in shape and a ring flange 112 extending radially outward from the body portion 108 .
- the exciter ring 36 is formed by stamping, while in other constructions the exciter ring 36 is formed by molding. No matter what the manner used to form the exciter ring 36 , the exciter ring 36 is formed separately from the brake rotor 24 .
- the ring flange 112 extends substantially perpendicular from the body portion 108 .
- the body portion 108 has an interior body surface 116 and an exterior body surface 120 and includes a detent 124 that extends outwardly from and completely around the exterior body surface 120 of the body portion 108 .
- the detent 124 does not extend completely around the exterior body surface 120 of the body portion 108 .
- a plurality of detents are spaced from one another around the exterior body surface 120 of the body portion 108 .
- a plurality of evenly spaced apertures 128 are defined in the ring flange 112 to define a plurality of exciter teeth 132 .
- the number of apertures 128 and exciter teeth 132 can vary depending on the size of the wheel 32 and/or the braking system being used with the wheel 32 and exciter ring 36 .
- the exciter ring 36 is positioned for assembly with the body portion 108 oriented toward the brake rotor 24 and aiming in the outboard direction and the ring flange 112 oriented generally parallel to the brake disc 56 .
- the body portion 108 is aligned with the barrel cavity 92 such that the longitudinal axis 52 substantially extends through a center of the body portion 108 .
- the body portion 108 of the exciter ring 36 is sized slightly larger than the reduced diameter portion of the barrel cavity 92 defined by the barrel projection 96 .
- the exciter ring 36 is inserted along the longitudinal axis 52 in the outboard direction and is forced into the barrel cavity 92 , which slightly deflects the body portion 108 inwardly to allow the detent 124 to pass by the barrel projection 96 . Once the detent 124 passes by the projection 96 , the body portion 108 flexes outwardly to position the detent 124 on the outboard side of the barrel projection 96 and position the ring flange 112 in the recess 104 defined in the interior surface 100 of the brake disc 56 .
- the exciter ring 36 is connected to the brake rotor 24 when the detent 124 is positioned on the outboard side of and in some constructions, engaged with the barrel projection 96 and when the outboard surface of the ring flange 112 engages the interior surface 100 of the brake disc 56 within the recess 104 .
- the exciter ring 36 and reduced diameter portion of the barrel cavity 92 defined by the barrel projection 96 are appropriately sized to secure the exciter ring 36 to the brake rotor 24 by a friction or interference connection.
- the body portion 108 is sized so that the distance between the detent 124 and ring flange 112 is only slightly larger than the width of the barrel projection 96 , so that the exciter ring fits snugly against the interior barrel surface 88 and the interior surface 100 within the recess 104 of the brake disc 56 .
- An adequate amount of force must be applied to the exciter ring 36 in an outboard direction to connect the exciter ring 36 to the brake rotor 24 and an adequate amount of force must be applied to the exciter ring 36 in an inboard direction to disconnect the exciter ring 36 from the brake rotor 24 .
- the exciter ring 36 and brake rotor 24 are configured such that the adequate amount of force required to disconnect the exciter ring 36 from the brake rotor 24 is larger than any force that may be applied to the exciter ring 36 in the inboard direction during normal operating conditions of the wheel assembly 20 .
- a sensor (not shown) of the ABS brake rotor 24 is positioned adjacent to the exciter ring 36 and measures the speed of the rotor 24 by detecting the change in magnetic flux caused by the movement of the exciter teeth 132 separated by the apertures 128 in the exciter ring 36 .
- the exciter ring 36 can be simply removed and replaced with another exciter ring 36 , rather than machining or cleaning of the exciter ring 36 or even disposal of the entire brake rotor which was necessary in previous brake rotors.
- the current exciter ring 36 eliminates the need for lengthy repair or cleaning services necessary to return the brake rotor and exciter ring to operating condition and does so in a relatively inexpensive manner.
Abstract
Description
- The present application is a continuation of U.S. patent application Ser. No. 10/977,020, filed Oct. 29, 2004, the entire contents of which are hereby incorporated by reference.
- The present invention relates to braking systems for vehicles and, more particularly, to exciter rings for brake rotors.
- Anti-lock braking systems (“ABS”) are used to increase traction and control of a vehicle under difficult braking conditions. On slippery surfaces, braking can cause the wheel to “lock up” and stop rotating. As a result, the portion of the wheel in contact with the road simply slides relative to the surface, which severely reduces traction and the ability to steer the vehicle. The loss (reduction) of traction causes the truck or tractor-trailer to become unstable and directional control becomes difficult. This problem is of particular concern for heavy commercial vehicles, such as tractor-trailers, where the loss of control can cause the vehicle to jack-knife.
- ABS systems prevent wheel lock up by rapidly releasing and reapplying pressure to the brakes, to permit the skidding wheel to regain traction and steering. ABS systems typically comprise a speed sensor positioned adjacent to four or more wheels of the vehicle. Each speed sensor is connected to a controller that monitors the acceleration/deceleration of the wheels. When wheel lock up occurs, the controller detects the abnormally abrupt deceleration of the wheel and operates a valve in the corresponding brake line to release pressure on the brake until the wheel begins to accelerate again. Once the controller senses the wheel accelerate, the controller reverses the valve to allow brake pressure to increase once more. The controller repeats this cycle of acceleration/deceleration many times per second, such that braking is kept near, but does not exceed, the point at which the wheel locks up.
- Speed sensors typically operate by detecting the rate of rotation of the wheel hub, brake drum or brake rotor. In the case of an ABS brake rotor, evenly spaced teeth are integrally cast on the surface of the brake rotor in the shape of a ring. The ring of teeth is commonly referred to as a tone ring or exciter ring, and the teeth are referred to as pulse teeth or exciter teeth. A typical exciter ring has about 80 to 120 teeth, depending on the size of the tire. The sensor typically comprises a magnetic pickup that is positioned adjacent to the exciter ring and measures the speed of the rotor by detecting the change in magnetic flux caused by the movement of the exciter teeth.
- A variety of methods are used to detect changes in magnetic flux, including variable reluctance, Hall effect and magnetic resistance, as are well known in the art. In each case, the strength of the signal received by the speed sensor decreases with distance from the exciter ring. Accordingly, some skill and care must be used to ensure that the speed sensor is positioned as close as possible to the exciter ring without actually contacting the exciter teeth.
- ABS brake rotors also require additional steps of machining and inspection to ensure that the exciter teeth are uniform and that the exciter ring is not damaged. Brake rotors are typically cast in rough form and then machined to their finished dimensions. However, the numerous teeth of the exciter ring are difficult to cast and frequently have casting defects and imperfections which require the rotor to be scrapped. In addition, the exciter teeth are susceptible to damage caused by mishandling following the casting step of the manufacturing process, which increases the scrap rate. Furthermore, the exciter teeth must have uniform depth and clean surfaces for the speed sensors to function properly. Thus, the exciter ring requires an additional machining step to remove any imperfections that would interfere with the operation of the speed sensor. Further yet, the exciter ring is integral with the brake rotor and unrepairable damage to the exciter ring results in discarding of the entire brake rotor. Replacing entire brake rotors due to damaged exciter rings can become very expensive. In addition, dirt and other debris accumulates on the exciter ring, which increases the rate of corrosion. As a result, the exciter ring is frequently the limiting factor in the life of a brake rotor.
- Thus, it would be desirable to provide an exciter ring that is formed separately from an ABS brake rotor and is removably connectable to the brake rotor to facilitate relatively easy replacement of the exciter ring when the exciter ring becomes damaged. In addition, it would be desirable to provide a simple, inexpensive, and quick process of refurbishing a wheel assembly when the exciter ring or exciter teeth are damaged.
- In some aspects, the invention provides a wheel assembly having a brake rotor including a barrel section having an interior surface defining a barrel cavity, a brake disc extending radially outwardly from the barrel section and defining a disc cavity in communication with the barrel cavity, and a projection extending from the interior surface of the barrel section into the barrel cavity, and an exciter ring formed separately from the brake rotor and being engagable with the projection within the barrel cavity to removably connect the exciter ring to the brake rotor.
- In some aspects, the invention provides an exciter ring formed separately from and removably connectable to a brake rotor, the exciter ring including a substantially cylindrical body portion having an inner surface and an outer surface, the inner surface defining a ring cavity, the body portion including a detent protruding outwardly from the outer surface and extending at least partially around the outer surface of the body portion, and a flange extending radially outwardly from the body portion and having a plurality of apertures therein.
- In some aspects, the invention provides a wheel assembly including a brake rotor having a projection, and an exciter ring formed separately from and removably connectable to the brake rotor, the exciter ring including a body portion and a flange extending radially outwardly from the body portion, the body portion having an inner surface and an outer surface, the inner surface defining a ring cavity, the body portion including a detent protruding outwardly from the outer surface and extending at least partially around the outer surface of the body portion, the flange having a plurality of apertures therein, wherein the detent is engagable with the projection to removably connect the exciter ring to the brake rotor.
- In some aspects, the invention provides a method of assembling a wheel assembly, the method including providing a brake rotor including a barrel section and a brake disc extending radially outwardly from the barrel section, the barrel section having an interior surface defining a barrel cavity and including a projection extending from the interior surface of the barrel section into the barrel cavity, the brake disc having a disc cavity, providing an exciter ring formed separately from the brake rotor, inserting the exciter ring through the disc cavity and into the barrel cavity, and engaging the exciter ring with the projection in the barrel section after inserting to removably connect the exciter ring to the brake rotor.
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FIG. 1 is a perspective view of a wheel assembly including an exciter ring embodying aspects of the invention. -
FIG. 2 is a front view of a wheel hub, a brake router and the exciter ring of the wheel assembly shown inFIG. 1 . -
FIG. 3 is a rear perspective view of the exciter ring shown inFIGS. 1 and 2 . -
FIG. 4 is a partial cross sectional view of the brake rotor and the exciter ring, taken along line 4-4 inFIG. 2 . - The invention is not limited in its application to the details of the construction and arrangements of the components set forth in the following description or illustrated in the drawings. The invention includes other embodiments and can be practiced or carried out in various different ways. Also, it is understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” and variations thereof herein are used broadly and encompass direct and indirect connections and couplings. In addition, the terms “connected” and “coupled” and variations thereof are not restricted to physical or mechanical connections or couplings.
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FIG. 1 illustrates awheel assembly 20 including abrake rotor 24, awheel hub 28, a tire orwheel 32, and anexciter ring 36. A brake pad (not shown) or other braking mechanism is engagable with thebrake rotor 24 to control the rotation of thewheel 32. Thewheel hub 28 is connected to thebrake rotor 24 with a plurality offasteners 40 and rotates with thebrake rotor 24. Thebrake rotor 24 defines arotor cavity 44 and thewheel hub 28 defines a hub cavity (not shown) therethrough that are aligned when thebrake rotor 24 andwheel hub 28 are connected. Thewheel hub 28 includes a plurality offasteners 48, such as, for example a combination of lug nuts and lug bolts, for connecting thewheel 32 to thewheel hub 28 and facilitating rotation of thewheel 32 with thewheel hub 28 and thebrake rotor 24. A wheel axle (not shown) has an end thereof inserted through the aligned cavities of thebrake rotor 24 andwheel hub 28 and connected to thewheel hub 28. The wheel axle is connectable to awheel assembly 20 at each end of the axle. - With reference to
FIGS. 1 and 4 , thebrake rotor 24 defines a centrallongitudinal axis 52 through a center thereof about which thebrake rotor 24 and theexciter ring 36 are symmetrically oriented. Thebrake rotor 24 includes abrake disc 56 having aninboard portion 60 and anoutboard portion 64 that are separated by a series ofvent holes 68, defined by spaceddividers 69, for cooling therotor 24. Aninboard brake surface 72 is formed on the inboard side of theinboard portion 60. Similarly, anoutboard brake surface 76 is formed on the outboard side of theoutboard portion 64. As used herein, the term “outboard” means facing away from or distal to the vehicle, and the term “inboard” means facing toward or proximal to the vehicle. Thebrake disc 56 has adisc cavity 78 that is defined in thebrake disc 56 between theinboard brake surface 72 and an interior surface 100 (described in more detail below). Thebrake rotor 24 also includes acylindrical barrel section 80 extending in the outboard direction from thebrake disc 56. Thebarrel section 80 is provided with aradial flange 84 extending radially inwardly that has a series of apertures for receiving thefasteners 40 for attaching thebrake rotor 24 to thewheel hub 28. Thebarrel section 80 also includes aninterior barrel surface 88 that defines abarrel cavity 92 through thebarrel section 80. Abarrel projection 96 extends inwardly from theinterior barrel surface 88 toward a center of thebarrel section 80 to provide a reduced diameter mouth to thebarrel cavity 92. In the illustrated construction, thebarrel projection 96 extends into thebarrel cavity 92 substantially perpendicular to thelongitudinal axis 52. In some constructions, thebarrel projection 96 is at least partially aligned with theoutboard portion 64 of thebrake disc 56 and is not between the inboard andoutboard portions brake disc 56. Theoutboard portion 64 of thebrake disc 56 forms aninterior surface 100 adjacent thebarrel section 80, and arecess 104 is formed in theinterior surface 100 near thebarrel section 80. - With reference to
FIGS. 1-4 , theexciter ring 36 includes abody portion 108 substantially cylindrical in shape and aring flange 112 extending radially outward from thebody portion 108. In the illustrated construction, theexciter ring 36 is formed by stamping, while in other constructions theexciter ring 36 is formed by molding. No matter what the manner used to form theexciter ring 36, theexciter ring 36 is formed separately from thebrake rotor 24. - In the illustrated construction, the
ring flange 112 extends substantially perpendicular from thebody portion 108. Thebody portion 108 has aninterior body surface 116 and anexterior body surface 120 and includes adetent 124 that extends outwardly from and completely around theexterior body surface 120 of thebody portion 108. In some constructions, thedetent 124 does not extend completely around theexterior body surface 120 of thebody portion 108. In other constructions, a plurality of detents are spaced from one another around theexterior body surface 120 of thebody portion 108. A plurality of evenly spacedapertures 128 are defined in thering flange 112 to define a plurality ofexciter teeth 132. The number ofapertures 128 andexciter teeth 132 can vary depending on the size of thewheel 32 and/or the braking system being used with thewheel 32 andexciter ring 36. - With particular reference to
FIG. 4 , assembly of theexciter ring 36 and thebrake rotor 24 will be described. Theexciter ring 36 is positioned for assembly with thebody portion 108 oriented toward thebrake rotor 24 and aiming in the outboard direction and thering flange 112 oriented generally parallel to thebrake disc 56. Thebody portion 108 is aligned with thebarrel cavity 92 such that thelongitudinal axis 52 substantially extends through a center of thebody portion 108. Thebody portion 108 of theexciter ring 36 is sized slightly larger than the reduced diameter portion of thebarrel cavity 92 defined by thebarrel projection 96. Theexciter ring 36 is inserted along thelongitudinal axis 52 in the outboard direction and is forced into thebarrel cavity 92, which slightly deflects thebody portion 108 inwardly to allow thedetent 124 to pass by thebarrel projection 96. Once thedetent 124 passes by theprojection 96, thebody portion 108 flexes outwardly to position thedetent 124 on the outboard side of thebarrel projection 96 and position thering flange 112 in therecess 104 defined in theinterior surface 100 of thebrake disc 56. Theexciter ring 36 is connected to thebrake rotor 24 when thedetent 124 is positioned on the outboard side of and in some constructions, engaged with thebarrel projection 96 and when the outboard surface of thering flange 112 engages theinterior surface 100 of thebrake disc 56 within therecess 104. Theexciter ring 36 and reduced diameter portion of thebarrel cavity 92 defined by thebarrel projection 96 are appropriately sized to secure theexciter ring 36 to thebrake rotor 24 by a friction or interference connection. In some constructions, thebody portion 108 is sized so that the distance between thedetent 124 andring flange 112 is only slightly larger than the width of thebarrel projection 96, so that the exciter ring fits snugly against theinterior barrel surface 88 and theinterior surface 100 within therecess 104 of thebrake disc 56. An adequate amount of force must be applied to theexciter ring 36 in an outboard direction to connect theexciter ring 36 to thebrake rotor 24 and an adequate amount of force must be applied to theexciter ring 36 in an inboard direction to disconnect theexciter ring 36 from thebrake rotor 24. Theexciter ring 36 andbrake rotor 24 are configured such that the adequate amount of force required to disconnect theexciter ring 36 from thebrake rotor 24 is larger than any force that may be applied to theexciter ring 36 in the inboard direction during normal operating conditions of thewheel assembly 20. - Upon assembly of the
exciter ring 36 and thebrake rotor 24 and operation of thewheel assembly 20, a sensor (not shown) of theABS brake rotor 24 is positioned adjacent to theexciter ring 36 and measures the speed of therotor 24 by detecting the change in magnetic flux caused by the movement of theexciter teeth 132 separated by theapertures 128 in theexciter ring 36. - In case of wear, damage, uncleanliness, etc. to the
exciter ring 36, theexciter ring 36 can be simply removed and replaced with anotherexciter ring 36, rather than machining or cleaning of theexciter ring 36 or even disposal of the entire brake rotor which was necessary in previous brake rotors. Thecurrent exciter ring 36 eliminates the need for lengthy repair or cleaning services necessary to return the brake rotor and exciter ring to operating condition and does so in a relatively inexpensive manner. - Although particular constructions of the present invention have been shown and described, other alternative constructions will be apparent to those skilled in the art and are within the intended scope of the present invention. Thus, the present invention is to be limited only by the claims.
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/624,548 US20070114099A1 (en) | 2004-10-29 | 2007-01-18 | Exciter ring for a brake rotor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/977,020 US7219778B2 (en) | 2004-10-29 | 2004-10-29 | Exciter ring for a brake rotor |
US11/624,548 US20070114099A1 (en) | 2004-10-29 | 2007-01-18 | Exciter ring for a brake rotor |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/977,020 Continuation US7219778B2 (en) | 2004-10-29 | 2004-10-29 | Exciter ring for a brake rotor |
Publications (1)
Publication Number | Publication Date |
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US20070114099A1 true US20070114099A1 (en) | 2007-05-24 |
Family
ID=36260988
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/977,020 Active US7219778B2 (en) | 2004-10-29 | 2004-10-29 | Exciter ring for a brake rotor |
US11/624,548 Abandoned US20070114099A1 (en) | 2004-10-29 | 2007-01-18 | Exciter ring for a brake rotor |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/977,020 Active US7219778B2 (en) | 2004-10-29 | 2004-10-29 | Exciter ring for a brake rotor |
Country Status (10)
Country | Link |
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US (2) | US7219778B2 (en) |
EP (1) | EP1825163B1 (en) |
JP (1) | JP2008517834A (en) |
AT (1) | ATE481577T1 (en) |
AU (1) | AU2005301149B2 (en) |
CA (1) | CA2585923C (en) |
DE (1) | DE602005023647D1 (en) |
HK (1) | HK1106569A1 (en) |
MX (1) | MX2007005094A (en) |
WO (1) | WO2006049851A1 (en) |
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US20070144840A1 (en) * | 2005-12-23 | 2007-06-28 | Brembo Ceramic Brake Systems S.P.A. | Disc for Disc Brakes |
US20090188762A1 (en) * | 2008-01-30 | 2009-07-30 | Hester Larry B | Disc Brake Assembly With Tone Ring |
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US20050212353A1 (en) * | 2004-03-25 | 2005-09-29 | Tolani Nirmal M | Corrosion and heat resistant coating for anti-lock brake rotor exciter ring |
US7219778B2 (en) * | 2004-10-29 | 2007-05-22 | Gunite Corporation | Exciter ring for a brake rotor |
US7779969B2 (en) * | 2005-06-03 | 2010-08-24 | Arvinmeritor Technology, Llc | Brake rotor and tone ring assembly |
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US7695075B1 (en) * | 2007-09-18 | 2010-04-13 | Robert Bosch Gmbh | Disc thickness variation compensation |
US8584815B2 (en) * | 2008-01-30 | 2013-11-19 | Walther Engineering And Manufacturing Company, Inc. | Disc brake assembly |
DE102008017360B3 (en) * | 2008-04-04 | 2009-07-30 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Brake disk arrangement for wheel hub of commercial vehicle, has pulse wheel comprising connecting lug for axial and non-rotating fixing of pulse wheel, and connecting part engaged behind support elements |
AU2014290117B2 (en) | 2013-07-19 | 2016-11-03 | Hendrickson Usa, L.L.C. | Improved disc brake rotor for heavy-duty vehicles |
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US10495163B2 (en) | 2017-04-26 | 2019-12-03 | Hendrickson Usa, L.L.C. | Tone ring and attachment structure |
CN111163981B (en) * | 2017-10-24 | 2022-07-12 | 亨德里克森美国有限责任公司 | Tone ring mounting structure for anti-lock brake system and method of manufacturing the same |
US10704602B2 (en) * | 2018-05-21 | 2020-07-07 | Arvinmeritor Technology, Llc | Brake rotor and tone ring assembly |
US10889275B2 (en) * | 2018-10-23 | 2021-01-12 | Dexter Axle Company | Wheel sensors within vehicular brake assemblies |
US11066051B2 (en) * | 2018-10-23 | 2021-07-20 | Dexter Axle Company | Wheel sensors within vehicular brake assemblies |
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US11773937B2 (en) | 2021-08-03 | 2023-10-03 | Brembo North America, Inc. | Anti-lock sensor ring, disk brake band and assembly |
DE202022103880U1 (en) * | 2022-07-11 | 2022-08-01 | Knott Gmbh | Trailer stabilization system for a vehicle trailer |
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2004
- 2004-10-29 US US10/977,020 patent/US7219778B2/en active Active
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2005
- 2005-10-14 WO PCT/US2005/037195 patent/WO2006049851A1/en active Application Filing
- 2005-10-14 CA CA2585923A patent/CA2585923C/en active Active
- 2005-10-14 AT AT05811943T patent/ATE481577T1/en not_active IP Right Cessation
- 2005-10-14 AU AU2005301149A patent/AU2005301149B2/en active Active
- 2005-10-14 JP JP2007538974A patent/JP2008517834A/en active Pending
- 2005-10-14 MX MX2007005094A patent/MX2007005094A/en active IP Right Grant
- 2005-10-15 EP EP05811943A patent/EP1825163B1/en active Active
- 2005-10-15 DE DE602005023647T patent/DE602005023647D1/en active Active
-
2007
- 2007-01-18 US US11/624,548 patent/US20070114099A1/en not_active Abandoned
- 2007-11-08 HK HK07112191.5A patent/HK1106569A1/en unknown
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USRE29509E (en) * | 1970-06-01 | 1978-01-03 | The Bendix Corporation | Wheel speed sensor for an adaptive braking system |
US3772548A (en) * | 1972-06-20 | 1973-11-13 | Rockwell International Corp | Wheel speed sensor |
US4061213A (en) * | 1975-05-15 | 1977-12-06 | The B. F. Goodrich Company | Brake disc adapter for use with anti-skid system |
US4161120A (en) * | 1978-05-08 | 1979-07-17 | Wabco Westinghouse | Equipment for the detection of rotation parameters in particular for a wheel-velocity sensor |
US5053656A (en) * | 1989-12-18 | 1991-10-01 | Ina Bearing Company, Inc. | Sensing ring for rotational sensing system |
US5129741A (en) * | 1991-04-05 | 1992-07-14 | The Budd Company | Hub assembly with integral ABS exciter ring seal |
US5557897A (en) * | 1992-02-20 | 1996-09-24 | Braas Gmbh | Fastening device for a roof sealing strip or the like |
US5422783A (en) * | 1992-07-06 | 1995-06-06 | Universal Electronics Inc. | Modular casing for a remote control having upper housing member slidingly received in a panel section |
US5296805A (en) * | 1992-08-17 | 1994-03-22 | General Motors Corporation | Serviceable wheel speed sensor with magnet assisted retention |
US5480007A (en) * | 1993-07-07 | 1996-01-02 | Kelsey-Hayes Company | Disc brake rotor |
US5432442A (en) * | 1993-07-30 | 1995-07-11 | Itt Corporation | Speed sensor including output signal proportional to air gap size |
US6184678B1 (en) * | 1996-07-10 | 2001-02-06 | Nissan Motor Co., Ltd. | Rotor for wheel speed sensor providing increased difference in output voltage of the sensor |
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US6642709B2 (en) * | 2001-10-17 | 2003-11-04 | A.J. Rose Manufacturing Co. | Signal wheel for generating rotational position signal |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070144840A1 (en) * | 2005-12-23 | 2007-06-28 | Brembo Ceramic Brake Systems S.P.A. | Disc for Disc Brakes |
US20090188762A1 (en) * | 2008-01-30 | 2009-07-30 | Hester Larry B | Disc Brake Assembly With Tone Ring |
US7980367B2 (en) | 2008-01-30 | 2011-07-19 | Walther Engineering And Manufacturing Company, Inc. | Disc brake assembly with tone ring |
Also Published As
Publication number | Publication date |
---|---|
WO2006049851A1 (en) | 2006-05-11 |
WO2006049851A8 (en) | 2007-01-04 |
CA2585923C (en) | 2013-05-07 |
JP2008517834A (en) | 2008-05-29 |
AU2005301149A1 (en) | 2006-05-11 |
CA2585923A1 (en) | 2006-05-11 |
US7219778B2 (en) | 2007-05-22 |
EP1825163A1 (en) | 2007-08-29 |
EP1825163A4 (en) | 2009-04-29 |
EP1825163B1 (en) | 2010-09-15 |
US20060091723A1 (en) | 2006-05-04 |
MX2007005094A (en) | 2007-07-04 |
AU2005301149B2 (en) | 2010-03-04 |
HK1106569A1 (en) | 2008-03-14 |
ATE481577T1 (en) | 2010-10-15 |
DE602005023647D1 (en) | 2010-10-28 |
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