CA1161282A - Drive systems - Google Patents
Drive systemsInfo
- Publication number
- CA1161282A CA1161282A CA000388620A CA388620A CA1161282A CA 1161282 A CA1161282 A CA 1161282A CA 000388620 A CA000388620 A CA 000388620A CA 388620 A CA388620 A CA 388620A CA 1161282 A CA1161282 A CA 1161282A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- pulleys
- rotatable member
- rotatable
- drive system
- 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.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
- D06F58/04—Details
- D06F58/08—Driving arrangements
-
- 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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
-
- 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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0808—Extension coil springs
-
- 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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0874—Two or more finally actuated members
Abstract
ABSTRACT OF THE DISCLOSURE
A belt drive system preferably for a clothes dryer has a high ratio of diameters between driving and driven members and has a pair of idler pulleys positioned close to the smaller member and mounted on a tensioning member to keep the belt in tension, and the closer adjacent faces of the idler pulleys are spaced apart by a distance not materially different from the diameter of the smaller member.
A belt drive system preferably for a clothes dryer has a high ratio of diameters between driving and driven members and has a pair of idler pulleys positioned close to the smaller member and mounted on a tensioning member to keep the belt in tension, and the closer adjacent faces of the idler pulleys are spaced apart by a distance not materially different from the diameter of the smaller member.
Description
11 ~ 6~282 1 This invention relates to a drive system particularly though not solely for use as a drive system for a clothes drying drum.
This invention consists in a drive system comprising driving and driven rotatable members having a high ratio of diameters, so tha-t one is large and the other small, a flexible endless driving band mounted on said rotatable members, a pair of pulleys bearing on said driving band to maintain said driving band in contact with said rotatable members, and tension means acting on said pulleys so that said pulleys maintain tension in said driving band r said pulleys being positioned adjacent said small rotatable member in substantially symmetri.cal relationship to said small rotatable member so that reversal of direction of the driving rotatable member does not materially affect power transmission, and said pulleys being spaced apart by a distance such that the closer adjacent faces of the pulleys are separated by a distance not.materially different from the diameter of said small rotatable member.
In a further aspect the invention consists in a clothes dryer having a cabinet and in said cabinet a rotatable drum an air heating means and an electric motor having a shaft and a drive system according to the preceding paragraph between said shaft and said drum.
To those skilled in the art to which this invention relates, many changes in construction ancd widely differing embodiments and applications of the invention will suggest themselves without cleparting from the scope of the invention 1 as defined in the appended claims. The disclosures and -the descriptions herein are purely illustrative and it is not our intention to limit the scope of the invention by those disclosures and descriptions, or otherwise, than by the terms of the appended claims.
One preferred embodiment of the invention will now be described with reference to the accompanying drawing wherein:
- Figure 1 is a perspective view of part of a clothes 10 dryer incorporating a drive system according to the invention, Figure 2 is a side elevation view of the drive system accordin~ to the invention, and Figuxe 3 is a plan view of the construction of figure 1.
15 ~: A pair of rotatable members are provided, one a driving member and the other a driven member, and the larger member preferably comprises a drum of a clothes dryer.having a cabinet and in said cabinet, the rotatable drum 1, air heating means, an electric motor 3 having a drive shaft and a drive system as follows.
~ smaller pulley 2 is the driving member and is integral with or.mounted on a shaft driven for example by a motor such as the electric motor 3~ -- About the drum and drive pulley is provided a flat belt 4.
A pair of idler pulleys 5 and 6 are provided, one on each side o drive pulley 2 and preferably e~ui-distant ,.1 .~
~ ~ 612~2 1 from the drive pulley, and the belt 5 also passes between the idler pulleys 5 and 6 so that the outer surface of the belt contacts the pulleys.
~he pul:Leys 5 and 6 are provided adjacent the drive pulley 2 and are positioned so that a line 11 joining the centres of the pulleys is substantially normal to the paxts 7 and 8 of the belt which lie between the drive pulley 2 and the pulleys 5 and 6.
The idler pulleys are crowned on their peripheral surface~ as may be seen in figure 3 to provide centering for the belt and thus substantially obv~ating the need to provide a crown on the drive pulley 2.
The idler pulleys 5 and 6 maintain a tension on ihe belt and this is achieved by providing an arm or lever 15 which ~es along an extension oE the line 11 and which is pivotally affixed at 16r ~or example to a supporting structure in the clothes dryer, e.g. part of tha cabinet or, as shown, a motor mounting bracket 17, and the arm is spring loadecl for example by spring 18 which pulls the pulleys 5 and 6 away ~rom the pulley 2 to tighten the belt.
The pulleys 5 and 6 are spaced apart a distance such that the distance between the closest adjacent faces 9 and 10 of the pulleys 5 and 6 is not substantially different from the diameter of the driving pulley 2. Thus the idler pulleys 5 and 6 are positioned so tha-t substantially 180 of belt wrap around the drive pulley 2 is obtained.
The use of the invention is as follows:
.
12~2 ~ n use the motor 3 is turned on which rotates the pulley 2 thus drivin~ the belt 4 to rotate the drum l and also ~he direct driving air impeller. Belt tension is maintained by the tension spring~ , the arm 15 and thus the pulleys 5 and 6.
It can therefore be seen that at least in the preferred form of the invention a drive system is provided which has a number of advantages.
l. The pulleys can be positioned to maintain substantially 180 of belt wrap around the drive pulley. Although the pulleys are mounted on a lever which moves pivotally, the pulleys 5 and 6 move only over a relatively short distance and over this distance the movement is substan-tially linear with respect to the drive pulley 2. Thus over a limited range, movement of the pulleys 5 and 6 does not materially change 1;he amount of belt wrap around the pulley 2. It is also apparent that each pu~ley could be mounted on an arm independent of the other but we prefer the use of the single arm 15. 0 2. The pulleys 5 and 6 can substantially precisely control the position of the belt axially along the drive pulley and permit the drive pulley to be a true cy]inder which enables improved drive of a flat belt when compared to a crowned pulley drive which is normally necessary to control the position of the belt.
3. The system is not direction sensitive and reverse direction rotation o~ the drum is able to be achieved without modification to the drive system.
This invention consists in a drive system comprising driving and driven rotatable members having a high ratio of diameters, so tha-t one is large and the other small, a flexible endless driving band mounted on said rotatable members, a pair of pulleys bearing on said driving band to maintain said driving band in contact with said rotatable members, and tension means acting on said pulleys so that said pulleys maintain tension in said driving band r said pulleys being positioned adjacent said small rotatable member in substantially symmetri.cal relationship to said small rotatable member so that reversal of direction of the driving rotatable member does not materially affect power transmission, and said pulleys being spaced apart by a distance such that the closer adjacent faces of the pulleys are separated by a distance not.materially different from the diameter of said small rotatable member.
In a further aspect the invention consists in a clothes dryer having a cabinet and in said cabinet a rotatable drum an air heating means and an electric motor having a shaft and a drive system according to the preceding paragraph between said shaft and said drum.
To those skilled in the art to which this invention relates, many changes in construction ancd widely differing embodiments and applications of the invention will suggest themselves without cleparting from the scope of the invention 1 as defined in the appended claims. The disclosures and -the descriptions herein are purely illustrative and it is not our intention to limit the scope of the invention by those disclosures and descriptions, or otherwise, than by the terms of the appended claims.
One preferred embodiment of the invention will now be described with reference to the accompanying drawing wherein:
- Figure 1 is a perspective view of part of a clothes 10 dryer incorporating a drive system according to the invention, Figure 2 is a side elevation view of the drive system accordin~ to the invention, and Figuxe 3 is a plan view of the construction of figure 1.
15 ~: A pair of rotatable members are provided, one a driving member and the other a driven member, and the larger member preferably comprises a drum of a clothes dryer.having a cabinet and in said cabinet, the rotatable drum 1, air heating means, an electric motor 3 having a drive shaft and a drive system as follows.
~ smaller pulley 2 is the driving member and is integral with or.mounted on a shaft driven for example by a motor such as the electric motor 3~ -- About the drum and drive pulley is provided a flat belt 4.
A pair of idler pulleys 5 and 6 are provided, one on each side o drive pulley 2 and preferably e~ui-distant ,.1 .~
~ ~ 612~2 1 from the drive pulley, and the belt 5 also passes between the idler pulleys 5 and 6 so that the outer surface of the belt contacts the pulleys.
~he pul:Leys 5 and 6 are provided adjacent the drive pulley 2 and are positioned so that a line 11 joining the centres of the pulleys is substantially normal to the paxts 7 and 8 of the belt which lie between the drive pulley 2 and the pulleys 5 and 6.
The idler pulleys are crowned on their peripheral surface~ as may be seen in figure 3 to provide centering for the belt and thus substantially obv~ating the need to provide a crown on the drive pulley 2.
The idler pulleys 5 and 6 maintain a tension on ihe belt and this is achieved by providing an arm or lever 15 which ~es along an extension oE the line 11 and which is pivotally affixed at 16r ~or example to a supporting structure in the clothes dryer, e.g. part of tha cabinet or, as shown, a motor mounting bracket 17, and the arm is spring loadecl for example by spring 18 which pulls the pulleys 5 and 6 away ~rom the pulley 2 to tighten the belt.
The pulleys 5 and 6 are spaced apart a distance such that the distance between the closest adjacent faces 9 and 10 of the pulleys 5 and 6 is not substantially different from the diameter of the driving pulley 2. Thus the idler pulleys 5 and 6 are positioned so tha-t substantially 180 of belt wrap around the drive pulley 2 is obtained.
The use of the invention is as follows:
.
12~2 ~ n use the motor 3 is turned on which rotates the pulley 2 thus drivin~ the belt 4 to rotate the drum l and also ~he direct driving air impeller. Belt tension is maintained by the tension spring~ , the arm 15 and thus the pulleys 5 and 6.
It can therefore be seen that at least in the preferred form of the invention a drive system is provided which has a number of advantages.
l. The pulleys can be positioned to maintain substantially 180 of belt wrap around the drive pulley. Although the pulleys are mounted on a lever which moves pivotally, the pulleys 5 and 6 move only over a relatively short distance and over this distance the movement is substan-tially linear with respect to the drive pulley 2. Thus over a limited range, movement of the pulleys 5 and 6 does not materially change 1;he amount of belt wrap around the pulley 2. It is also apparent that each pu~ley could be mounted on an arm independent of the other but we prefer the use of the single arm 15. 0 2. The pulleys 5 and 6 can substantially precisely control the position of the belt axially along the drive pulley and permit the drive pulley to be a true cy]inder which enables improved drive of a flat belt when compared to a crowned pulley drive which is normally necessary to control the position of the belt.
3. The system is not direction sensitive and reverse direction rotation o~ the drum is able to be achieved without modification to the drive system.
2 ~ 2 4. A clothes dryer drum normally rotates at about 50 rpm and the actual rate of rotation is fairly critical and is dependent upon the diameter of the drum.
Four pole motors usually run at about 1420 rpm (for a 50 ~iz power supply) or about 1700 rpm (for 60 Hz power supply). This means that the driving pulley has to be in the region of 20mm diameter or less and this pu~s demands on ~he drive belt.
The air impeller which moves air through the dryer is limited in speed to the speed of rotation of the motor where the fan is directly moun~ed, for example about 1~20 rpm.
The present invention allows the use of a hi~her speed motor e.g. a two pole motor rather than a typical four pole motor so that rotation of, for example, 2800 rpm is possible. Use of such a motor has the advantage of providing higher air pressures or permits the use of smaller diameter fans or a combination of both.
When using a two pole motora the diameter of the drive pulley must be reduced further, for example to about half the diameter of the pulley used with a four pole motor but the present invention allows difficulties created with conventional drive belt systems to be substantially overcomè.
Tlle invention is also applicable to a multi V belt in which case ~he crowning of the pulleys 5 and 6 would not be necessary.
Four pole motors usually run at about 1420 rpm (for a 50 ~iz power supply) or about 1700 rpm (for 60 Hz power supply). This means that the driving pulley has to be in the region of 20mm diameter or less and this pu~s demands on ~he drive belt.
The air impeller which moves air through the dryer is limited in speed to the speed of rotation of the motor where the fan is directly moun~ed, for example about 1~20 rpm.
The present invention allows the use of a hi~her speed motor e.g. a two pole motor rather than a typical four pole motor so that rotation of, for example, 2800 rpm is possible. Use of such a motor has the advantage of providing higher air pressures or permits the use of smaller diameter fans or a combination of both.
When using a two pole motora the diameter of the drive pulley must be reduced further, for example to about half the diameter of the pulley used with a four pole motor but the present invention allows difficulties created with conventional drive belt systems to be substantially overcomè.
Tlle invention is also applicable to a multi V belt in which case ~he crowning of the pulleys 5 and 6 would not be necessary.
Claims (4)
- Claim 1 continued...
said belt and substantially prevent reversal of direction of said driving member from materially effecting power transmission between the rotatable members. - 2. A drive system as claimed in claim 1 wherein said belt engaging peripheral faces of each of said idler pulleys is crowned and said drive belt is a flat belt.
- 3. A drive system as claimed in claim 2 wherein the smaller rotatable member is the driving member and said pulleys are spaced substantially equi-distant therefrom.
- 4. A clothes dryer having a housing, a drum rotatably mounted in said housing, an electric motor mounted in said housing having an output shaft, and a drive system in accordance with claim 3 wherein said driven rotatable member comprises the rotatable drum, said driving rotatable member comprises a drive pulley on said motor shaft, a motor support bracket is provided rigidly attached to said housing, said motor being mounted on said bracket, said idler pulley support arm is pivotally supported on said bracket, and said spring means comprises a coil spring connected at one end to said support arm and at the other end to said bracket.
1. In a drive system for driving and driven rotatable members having a high ratio of diameters so that one rota-table member is relatively small with respect to the other, a flexible endless drive belt operably engaging said rotatable members so that they rotate together, and idler pulleys engaging said belt to assist in maintaining engagement of said belt with said rotatable members, the improvement comprising an idler pulley support arm pivotally supported at one end on a support member fixed with respect to the smaller rotatable member, a pair of idler pulleys rotatably mounted in fixed spaced relationship on the other end of said support arm closely adjacent and in substantially symmetrical relationship with the smaller rotatable member with the belt passing between them in engagement with the adjacent portions of their peripheral surfaces so that the belt engaging peripheral faces of said pulleys are spaced a distance apart substantially the same as the diameter of the smaller rotatable member in engagement with said belt and a straight line passing through the centers of rotation of said pulleys is substantially normal to the portions of the belt between said pulleys and the smaller rotatable member, and a spring means resiliently urging said arm about its pivot axis towards the larger rotatable member to maintain tension on
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ195362 | 1980-10-24 | ||
| NZ19536280 | 1980-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1161282A true CA1161282A (en) | 1984-01-31 |
Family
ID=19919371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000388620A Expired CA1161282A (en) | 1980-10-24 | 1981-10-23 | Drive systems |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4407077A (en) |
| JP (1) | JPS57127151A (en) |
| AU (1) | AU7556581A (en) |
| CA (1) | CA1161282A (en) |
| DE (1) | DE3141384A1 (en) |
| FR (1) | FR2495258A1 (en) |
| GB (1) | GB2086002B (en) |
| IT (2) | IT1144988B (en) |
| ZA (1) | ZA816622B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1245246A (en) * | 1984-07-27 | 1988-11-22 | John Garin | Scara type manipulator apparatus |
| USRE34311E (en) * | 1984-08-30 | 1993-07-13 | Texas Instruments Incorporated | Semiconductor slice cassette transport unit |
| US4636128A (en) * | 1984-08-30 | 1987-01-13 | Texas Instruments Incorporated | Semiconductor slice cassette transport unit |
| US5636453A (en) * | 1995-04-12 | 1997-06-10 | Whirlpool Corporation | Plastic bearing dryer idler |
| DE19517372C2 (en) * | 1995-05-11 | 2001-04-05 | Bsh Bosch Siemens Hausgeraete | Drum tumble dryer with drive belt and tensioner |
| US5501021A (en) * | 1995-05-30 | 1996-03-26 | White Consolidated Industries, Inc. | Common idler strap for use in a clothes dryer |
| CN102505431B (en) * | 2002-04-10 | 2014-09-24 | 菲舍尔和佩克尔应用有限公司 | A laundry appliance |
| US7249742B2 (en) | 2002-04-10 | 2007-07-31 | Fisher & Paykel Appliances Limited | Self-levelling foot arrangement for an appliance |
| CA2434354C (en) * | 2003-07-03 | 2008-10-14 | Camco Inc. | Clothes dryer with self speed regulated motor |
| DE102006029960A1 (en) * | 2006-06-29 | 2008-01-03 | BSH Bosch und Siemens Hausgeräte GmbH | Dryer with reduced noise, suitable blower and impeller and method for producing the impeller |
| EP2053153A1 (en) * | 2007-10-25 | 2009-04-29 | Electrolux Home Products Corporation N.V. | Laundering machine |
| US7992321B2 (en) * | 2007-12-19 | 2011-08-09 | Electrolux Home Products | Laundry dryer having three roller drum support system and reversing idler assembly |
| US20130239428A1 (en) * | 2012-03-14 | 2013-09-19 | Alliance Laundry Systems Llc | Method to reverse cylinder drive in a direct belt on basket dryer/tumbler |
| DE102016113803A1 (en) * | 2015-07-28 | 2017-02-02 | Steering Solutions Ip Holding Corporation | PULLEY ASSEMBLY WITH IDLE ROLL, POWER SUPPORT SYSTEM WITH PULLEY ASSEMBLY AND METHOD |
| CN109595892B (en) * | 2018-12-10 | 2020-08-21 | 唐山华纤科技有限公司 | Drying device suitable for ceramic pipeline |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US976115A (en) * | 1910-11-15 | Burke Electric Company | Power mechanism. | |
| GB136422A (en) * | 1919-03-22 | 1919-12-18 | Harold Laughton | Improvements in Power-transmission Belt Gearing. |
| US1809435A (en) * | 1927-08-18 | 1931-06-09 | Charles O Wood | Belt drive |
| US2576582A (en) * | 1946-01-18 | 1951-11-27 | Floyd A Elliott | Scooter starter unit |
| FR1191860A (en) * | 1958-02-24 | 1959-10-22 | Belt tensioning device and the like | |
| DE1575619A1 (en) * | 1966-08-09 | 1970-01-15 | Siemens Elektrogeraete Gmbh | Belt tensioner for reversing belt drives |
| US3514867A (en) * | 1968-06-21 | 1970-06-02 | Blackstone Corp | Clothes dryers with reversing drum |
| DE2207372A1 (en) * | 1972-02-17 | 1973-08-23 | Miele & Cie | CLOTHING DRYER WITH CIRCULATING WASHING DRUM |
| US4019397A (en) * | 1975-10-06 | 1977-04-26 | General Electric Company | Belt drive mechanism |
| US4069719A (en) * | 1976-06-18 | 1978-01-24 | Cancilla Philip S | Chain tensioner for chain drives |
| US4147070A (en) * | 1977-09-15 | 1979-04-03 | General Electric Company | Automatic belt tightener |
| CA1124106A (en) * | 1979-06-01 | 1982-05-25 | Victor Gladysz | Belt tensioning assembly for a clothes dryer |
-
1981
- 1981-09-21 US US06/304,059 patent/US4407077A/en not_active Expired - Fee Related
- 1981-09-22 AU AU75565/81A patent/AU7556581A/en not_active Abandoned
- 1981-09-23 ZA ZA816622A patent/ZA816622B/en unknown
- 1981-10-17 DE DE19813141384 patent/DE3141384A1/en not_active Withdrawn
- 1981-10-20 GB GB8131610A patent/GB2086002B/en not_active Expired
- 1981-10-21 JP JP56168520A patent/JPS57127151A/en active Pending
- 1981-10-21 FR FR8119741A patent/FR2495258A1/en not_active Withdrawn
- 1981-10-23 CA CA000388620A patent/CA1161282A/en not_active Expired
- 1981-10-23 IT IT68379/81A patent/IT1144988B/en active
- 1981-10-23 IT IT8153736U patent/IT8153736V0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57127151A (en) | 1982-08-07 |
| DE3141384A1 (en) | 1982-09-16 |
| AU7556581A (en) | 1982-04-29 |
| GB2086002A (en) | 1982-05-06 |
| IT1144988B (en) | 1986-10-29 |
| GB2086002B (en) | 1984-08-08 |
| US4407077A (en) | 1983-10-04 |
| IT8168379A0 (en) | 1981-10-23 |
| IT8153736V0 (en) | 1981-10-23 |
| ZA816622B (en) | 1982-09-29 |
| FR2495258A1 (en) | 1982-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |