CA2108323A1 - Motor support for orbital polisher - Google Patents
Motor support for orbital polisherInfo
- Publication number
- CA2108323A1 CA2108323A1 CA002108323A CA2108323A CA2108323A1 CA 2108323 A1 CA2108323 A1 CA 2108323A1 CA 002108323 A CA002108323 A CA 002108323A CA 2108323 A CA2108323 A CA 2108323A CA 2108323 A1 CA2108323 A1 CA 2108323A1
- Authority
- CA
- Canada
- Prior art keywords
- armature
- support member
- motor
- housing
- stator
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
Abstract
MOTOR SUPPORT FOR ORBITAL POLISHER
ABSTRACT
In the construction of a motor driven tool, a bucket-shaped housing having upper and lower parts, a preassembly of a motor support, and a motor assembly including an armature and stator mounted on the support and in coaxial relation to the housing parts, and bearing means for supporting the opposite end of the armature, respectively, in the motor support and in one aid housing part, the armature being fixedly connected to the support and the stator being magnetically retained to the armature.
ABSTRACT
In the construction of a motor driven tool, a bucket-shaped housing having upper and lower parts, a preassembly of a motor support, and a motor assembly including an armature and stator mounted on the support and in coaxial relation to the housing parts, and bearing means for supporting the opposite end of the armature, respectively, in the motor support and in one aid housing part, the armature being fixedly connected to the support and the stator being magnetically retained to the armature.
Description
2 3~
0275-00~08 - 1 -~fO~O~ ~VPPORq! FO~ ORB~q!AT~ ~o~ R
BACXG~OUND AND ~Y O~ PJV~N~rIO~ :
:I!his invention relates to the corlstruction of a motor driven tool and, more particularly, to a oonstruction which 5 provide~; ease o~ asFembly and added ~tabllity and rigidity for the re~ulting assembly.
Motor driven tool~ ar~ typically constructed with a two-part cla~shell type housing wherein ths motor fit~3 within rece~ses mold~d as part of` the interior of the ~0 hou~ing, ~h~ a~tachment together og t~e two part~ of the housing acting to 6ecure the motor therein. Thi~ form c>f constru ::tic:~n can present ~ number of di~advantages, among which is a relatively loose containment o~ the motor in th2 housing. Such loose ~ontainment leads to a certain amount of ~nstab~lity for the overall tool.
It is therefore a primary object of this invention to provide a tool oonstruction which results in enhanced stability and rigidity of the tool.
Another ob; ect i~ provision of a motor construction whereln the armature and stator are accurately located and accurately positioned relative to a support mem~er.
Another ob~ect is provision of a motor support which permits preassembly o~ the internal components of the machine, prior to final assembly o~ the motor assembly to the motor housing.
The foregoing and additional objects are attained in accordan~e with the principl~s of this invention by provid~ng a power tool comprising a two-part bucket-shaped housing, a motor preassembly connected to the housing, and means ~or po~itioning the motor assembly in coaxial relationship to each part o~ thQ housing. For the purposes of convenienc~, the power tool will be re~erred to as a hand-held or~tal poliæherO The motor preassembly comprises a ~otor ~upport peripherally connected to t~e housing, an armature fixedly connected to the ~otor support and including an axial ~ha~t arranged vertically ~nd having its opposite respective ends supported for rotation in the motor support and the housing, a stator including a pair o~
. - - .
, ~: . , - :
- .
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permanent magnets, and means for positioning and retaining the stator in coaxial relation to the armature.
In accordance with a particular a pect of thi~
invention, the housing i~ ~ntegrally ~ormed to include upper and lower housin~ parts Por enclosing the motor assembly~ and th~ motor ~upport i~ conn~cted to a horizontal housing flange and extends tran~versely to the motor axis. The motor ~uppor~ pos$tions, locat~s and aligns the motor assembly, a clrcuit board, a ~witch, and electrical wiring for assembly into the housing.
Advantageously, i~ the ~implified as~embly of the internal components of the polisher on a slnglQ unitary support. The assembly of the internal components i5 simple because the assembly is conducted external to the motor housing.
Further objects, advantages and features of the present i~vention will become more fully apparent ~rom the detailed consideration of the arrangement and construct~on of the constituent parts as ~Qt forth in ~ollowing descr~ptlon taken togeth~r with th~ accompanying drawings~
BRI~ ~E8C~I~TION O~ T~B D~A~I~
Figur~ 1 is a top plan view of an orbital polisher, according to the pre~ent invantion.
Figure 2 is a vertical transverse cross-sectional vlew taken along line 2-2 of Figure 19 Figure 3 is a~ enlarged perspectiYe view of a motor suppo~t.
Figure 4 is an exploded view of a motor preassembly.
Figure S i an exploded view o~ the ~otor prea se~bly o~ Flgure ~ posltion~d ~or asse~bly ~nto a bucket-shaped motor housing.
DETAI~D DEBCRIP~ION OF T~B P~EFB~RBD B~BODIM~NT
Turning now to the drawing~, Flgures 1-5 illustrate a hand-held orbital pollsh2r 10 of the type including a hou~ing ~ssembly 12, ~ pe~man~nt magnet Qlectrlcal motor 14 including ~n ~xial ~ha~t 16 to drive a surfac~ treatment a~sembly (~.g., a polishing pad), and an electrical control including a switch 18 in operable relation to the motor.
~ ~ 2~323 Whil~ the~e figures illu5trate an exemplary pre~erred embodiment as applied to an orbital polisher, one skilled in ~he art will readily recognlza ~rom th~ following discu6sion that ~uch illustrative embodiment i5 exemplary and that the motor mounting arrangement of the invention i8 also applicable to other power tool apparatu~ requ~r~ng accurate positioning o~ the motor.
The housing assembly 12 comprise a qenerally bucket-shaped motor housing 20 having upper and lower portion~ 22 and 24, a pair of handles 26 clo~e conn~cted to th~ motor housing to enable the user to maneuver the poli6her a~d operate the motor switch 18~ ~ cap 28 fixed to the top open end of the upper port~on 22, and a motor support 30 for ~upporting all of the major internal components of the polisher. The upper and lower portions 22 and 24 ~re generally cylindrical, coaxially arranged vertically along a longitudinal axis 32l and coaxially arranged with the axis of the motor shaft 16, the upper portion 22 for enclosing the motor and the lower portion 24 being downwardly open and de~ining a ~kirt which enGloses the polish$ng pad.
The motor 14 includes an armature 34 and a 6tator 36 concentrically aligned with the axis 32. The motor ehaft 16 is centrally disposed relative to the armature 34 and has its opposite axial end portions 3B and 40 extending there~rom. The shaft end portion 38 includes an annular ~lan~e 42 sized to be received in the central opening 41 of a bearing retainer plate 44.
Th~ ~tator 36 comprises a cylindr~cal sleeve 46 having opposit~ axial end faces 48 and 50 and ~nner and ou~er cylindrical wall~ 54 and 56, and a pair of id~ntical 8Q
cylindrical magnets 58 fixedly bonded to tha inner wall 54 so as to b~ in ~ncircling relation to the armature. Each ~agnet has a pair of angularly ~paced end faces 60 and 62, the end faces 6ubtending an angl~ of approximately 140~
whQreby to form an air gap 64 betw~en thQ magn~ts. Ths magnst 81QQVe 4 6 i8 retained on the motor armature 801ely - due to magnetic force.
2 .~ ~ 3 2 ~
0275-00108 - ~ -Tha motor support 30 comprises a generally planar platP having top and bottom surfaces 66 and 68 and an outer perlphery 70, the top surgace 66 being adapted to mount against an annular flange or shoulder 7~ extending from the motor hou ing 20. The motor supp~rt 30 is lntegrally formed of a polymeric material and include a base 7~ for ~upporting and locating t~e motor 14, a cylindrlcal bearing well 76 for receiving a roller bearing 78, a series of intexnally threaded t~bular bosses ~0 ~or receiv~ng ~ounting ~crews 82, a resilient latch 84 and guide 86 for retaining a prin~ed circuit board 88, a re~ainer 90 for mounting the motor ~witch 18, a terminal block retainer 92, wire retainers 94 for posit~oning and retaining electrical wiring, and a wire retainer 96 for retaining and routing a power cord 98.
The motor support and locating base ~4 define~ a cradle 100 for 6upporting the Qnd ~ace 48 o~ the 6tator ~leeve 46 and includes a pair o~ semi-cyl~ndrical walls 102 for enclosing the outer wall 56 of the ~leeve 46, a radial locating ta~ 104 ~or angularly locating the 61eeve 46 and the permanent magnets 58 relative to the base 74, and an inner wall 106 ~orming a ~ylindrical well 108 for r~c~iving the bottom end portion o* the armature. The tab 104 i~
received in a notch 110 formed in the end facs 48 of ~he sleeve 48 for accurately locatlng and posi~ioning the magnets relative to the armature. Upwardly extending from the well 108 are a plurality of angled wall~ 112 for eupporting the armature in the well 108. ~ -The roller bearing 78 and a roller bearing 114 ar~
provided to ~upport the opposite respective end portions 38 and 40 o~ th~ motor ~ha~t 16. The bearing 78 iq adapted to be recelved ln the bearing wall 76 and be captivated herein by tha bearing retainar plate 44, the plate 44 belng 6ecured to the motor support 30 by a ~astener 118.
The roller bearing 114 is received in n b2aring well 120 formed in tha upper housing port~on 22.
To assemble the polisher, a mo~or prea~sembly i8 ~:
- formed. The motor support 30 is located on work table and ~" ~ i 2~ 8~23 0275-0010~ - 5 -the lower roller bearing 78, sw~tch 18, printed circu~t ~oard ~8, pow~r cord g8 and wir~ng are s~cured to th~
support member. ~he bearing 78 is posit~oned in the well 76 a~d the bearlng r~tainer plate 44 ~ secured to the support member by the ~astener 11~, ther~by capt~vating the bearing 78. The ~ircuit board 88 is inserted downwardly into the guide 86, causing the latch 84 to d~flect, to allow ent~y, and spring rorward to re~a~n the board. The power cord 98 i~ ~ecured to a t~readed bos~ 122 by a fastener 124 and clamp 126, the clamp 126 engaging the cord 9~ and the fastener 124 driving the clamp downwardly against the boss 122.
The mokor 14 is lowered onto the cradle 100 and the bottom portion supported on the walls 112 in the motor well 108. The shaft end portion 38 is frictionally engaged w1th the bearing 78 and extended through an opening in the well 108 and below the support 30. The motor is ~ixedly connected to the support 30 ~olely by the ~ri~tional engagement between the shaft and th~ bearing. The friction ~orce is greater than the weight of the motor ~uch that when the support member is turned upside down, the motor will not Gome out of the bearing.
As shown best ~n Figure 5, mo'tor housing 12 i8 ~urned upside down so as to be upwardly open, wher~upon the upper bearing 114 is c~ptivated in the bearlng well 120 formed in the housing portion 22. The motor support 30 with the internal components preassembled thereto is turned upside down, lowered into the motor housing, upside down, and the support surface 66 peripherally seated against the flange 72. The upper end face 50 of the sleeve 46 i~ abutted against the upper housing portion 22. The motor ~upport 30 is then secured to the motor housing by engaging Rcrews with respective of the threaded screw bosses. The upper housing ~ection cap ~8 and handles 26 are then attached to the motor housing.
~ or as~embly of the ~tator and armatura, an insertion member 130 can be usedO The insertion member includes a cylindrical sleeve 132 which 1g adapted to seat about an ;-.
. ~ :
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'~ i ' .,' .: . - . . .
' ~ . . ~ , 2~ ~3~3 0~75-~0108 - 6 -annular shoulder 134 of the armature 34, and a ~rusto-conical sleeve portion 136 over which thQ magnet~ 5~ are dri~en, whereby the ~tator ~leeve 46 i8 coaxially positioned about the armature.
Whil& the above description constitutes the preferred embodiment o~ the invention, it will be appreciated that the invention is ~usceptible to modification, variation, and change w~thout departing from the proper cope or fair meaning of the accompanying claims.
~ , - . ~ . - . - . , - . -.. , .,.. ~ , ... .... .-
0275-00~08 - 1 -~fO~O~ ~VPPORq! FO~ ORB~q!AT~ ~o~ R
BACXG~OUND AND ~Y O~ PJV~N~rIO~ :
:I!his invention relates to the corlstruction of a motor driven tool and, more particularly, to a oonstruction which 5 provide~; ease o~ asFembly and added ~tabllity and rigidity for the re~ulting assembly.
Motor driven tool~ ar~ typically constructed with a two-part cla~shell type housing wherein ths motor fit~3 within rece~ses mold~d as part of` the interior of the ~0 hou~ing, ~h~ a~tachment together og t~e two part~ of the housing acting to 6ecure the motor therein. Thi~ form c>f constru ::tic:~n can present ~ number of di~advantages, among which is a relatively loose containment o~ the motor in th2 housing. Such loose ~ontainment leads to a certain amount of ~nstab~lity for the overall tool.
It is therefore a primary object of this invention to provide a tool oonstruction which results in enhanced stability and rigidity of the tool.
Another ob; ect i~ provision of a motor construction whereln the armature and stator are accurately located and accurately positioned relative to a support mem~er.
Another ob~ect is provision of a motor support which permits preassembly o~ the internal components of the machine, prior to final assembly o~ the motor assembly to the motor housing.
The foregoing and additional objects are attained in accordan~e with the principl~s of this invention by provid~ng a power tool comprising a two-part bucket-shaped housing, a motor preassembly connected to the housing, and means ~or po~itioning the motor assembly in coaxial relationship to each part o~ thQ housing. For the purposes of convenienc~, the power tool will be re~erred to as a hand-held or~tal poliæherO The motor preassembly comprises a ~otor ~upport peripherally connected to t~e housing, an armature fixedly connected to the ~otor support and including an axial ~ha~t arranged vertically ~nd having its opposite respective ends supported for rotation in the motor support and the housing, a stator including a pair o~
. - - .
, ~: . , - :
- .
~ ~ 2~ ~8~
permanent magnets, and means for positioning and retaining the stator in coaxial relation to the armature.
In accordance with a particular a pect of thi~
invention, the housing i~ ~ntegrally ~ormed to include upper and lower housin~ parts Por enclosing the motor assembly~ and th~ motor ~upport i~ conn~cted to a horizontal housing flange and extends tran~versely to the motor axis. The motor ~uppor~ pos$tions, locat~s and aligns the motor assembly, a clrcuit board, a ~witch, and electrical wiring for assembly into the housing.
Advantageously, i~ the ~implified as~embly of the internal components of the polisher on a slnglQ unitary support. The assembly of the internal components i5 simple because the assembly is conducted external to the motor housing.
Further objects, advantages and features of the present i~vention will become more fully apparent ~rom the detailed consideration of the arrangement and construct~on of the constituent parts as ~Qt forth in ~ollowing descr~ptlon taken togeth~r with th~ accompanying drawings~
BRI~ ~E8C~I~TION O~ T~B D~A~I~
Figur~ 1 is a top plan view of an orbital polisher, according to the pre~ent invantion.
Figure 2 is a vertical transverse cross-sectional vlew taken along line 2-2 of Figure 19 Figure 3 is a~ enlarged perspectiYe view of a motor suppo~t.
Figure 4 is an exploded view of a motor preassembly.
Figure S i an exploded view o~ the ~otor prea se~bly o~ Flgure ~ posltion~d ~or asse~bly ~nto a bucket-shaped motor housing.
DETAI~D DEBCRIP~ION OF T~B P~EFB~RBD B~BODIM~NT
Turning now to the drawing~, Flgures 1-5 illustrate a hand-held orbital pollsh2r 10 of the type including a hou~ing ~ssembly 12, ~ pe~man~nt magnet Qlectrlcal motor 14 including ~n ~xial ~ha~t 16 to drive a surfac~ treatment a~sembly (~.g., a polishing pad), and an electrical control including a switch 18 in operable relation to the motor.
~ ~ 2~323 Whil~ the~e figures illu5trate an exemplary pre~erred embodiment as applied to an orbital polisher, one skilled in ~he art will readily recognlza ~rom th~ following discu6sion that ~uch illustrative embodiment i5 exemplary and that the motor mounting arrangement of the invention i8 also applicable to other power tool apparatu~ requ~r~ng accurate positioning o~ the motor.
The housing assembly 12 comprise a qenerally bucket-shaped motor housing 20 having upper and lower portion~ 22 and 24, a pair of handles 26 clo~e conn~cted to th~ motor housing to enable the user to maneuver the poli6her a~d operate the motor switch 18~ ~ cap 28 fixed to the top open end of the upper port~on 22, and a motor support 30 for ~upporting all of the major internal components of the polisher. The upper and lower portions 22 and 24 ~re generally cylindrical, coaxially arranged vertically along a longitudinal axis 32l and coaxially arranged with the axis of the motor shaft 16, the upper portion 22 for enclosing the motor and the lower portion 24 being downwardly open and de~ining a ~kirt which enGloses the polish$ng pad.
The motor 14 includes an armature 34 and a 6tator 36 concentrically aligned with the axis 32. The motor ehaft 16 is centrally disposed relative to the armature 34 and has its opposite axial end portions 3B and 40 extending there~rom. The shaft end portion 38 includes an annular ~lan~e 42 sized to be received in the central opening 41 of a bearing retainer plate 44.
Th~ ~tator 36 comprises a cylindr~cal sleeve 46 having opposit~ axial end faces 48 and 50 and ~nner and ou~er cylindrical wall~ 54 and 56, and a pair of id~ntical 8Q
cylindrical magnets 58 fixedly bonded to tha inner wall 54 so as to b~ in ~ncircling relation to the armature. Each ~agnet has a pair of angularly ~paced end faces 60 and 62, the end faces 6ubtending an angl~ of approximately 140~
whQreby to form an air gap 64 betw~en thQ magn~ts. Ths magnst 81QQVe 4 6 i8 retained on the motor armature 801ely - due to magnetic force.
2 .~ ~ 3 2 ~
0275-00108 - ~ -Tha motor support 30 comprises a generally planar platP having top and bottom surfaces 66 and 68 and an outer perlphery 70, the top surgace 66 being adapted to mount against an annular flange or shoulder 7~ extending from the motor hou ing 20. The motor supp~rt 30 is lntegrally formed of a polymeric material and include a base 7~ for ~upporting and locating t~e motor 14, a cylindrlcal bearing well 76 for receiving a roller bearing 78, a series of intexnally threaded t~bular bosses ~0 ~or receiv~ng ~ounting ~crews 82, a resilient latch 84 and guide 86 for retaining a prin~ed circuit board 88, a re~ainer 90 for mounting the motor ~witch 18, a terminal block retainer 92, wire retainers 94 for posit~oning and retaining electrical wiring, and a wire retainer 96 for retaining and routing a power cord 98.
The motor support and locating base ~4 define~ a cradle 100 for 6upporting the Qnd ~ace 48 o~ the 6tator ~leeve 46 and includes a pair o~ semi-cyl~ndrical walls 102 for enclosing the outer wall 56 of the ~leeve 46, a radial locating ta~ 104 ~or angularly locating the 61eeve 46 and the permanent magnets 58 relative to the base 74, and an inner wall 106 ~orming a ~ylindrical well 108 for r~c~iving the bottom end portion o* the armature. The tab 104 i~
received in a notch 110 formed in the end facs 48 of ~he sleeve 48 for accurately locatlng and posi~ioning the magnets relative to the armature. Upwardly extending from the well 108 are a plurality of angled wall~ 112 for eupporting the armature in the well 108. ~ -The roller bearing 78 and a roller bearing 114 ar~
provided to ~upport the opposite respective end portions 38 and 40 o~ th~ motor ~ha~t 16. The bearing 78 iq adapted to be recelved ln the bearing wall 76 and be captivated herein by tha bearing retainar plate 44, the plate 44 belng 6ecured to the motor support 30 by a ~astener 118.
The roller bearing 114 is received in n b2aring well 120 formed in tha upper housing port~on 22.
To assemble the polisher, a mo~or prea~sembly i8 ~:
- formed. The motor support 30 is located on work table and ~" ~ i 2~ 8~23 0275-0010~ - 5 -the lower roller bearing 78, sw~tch 18, printed circu~t ~oard ~8, pow~r cord g8 and wir~ng are s~cured to th~
support member. ~he bearing 78 is posit~oned in the well 76 a~d the bearlng r~tainer plate 44 ~ secured to the support member by the ~astener 11~, ther~by capt~vating the bearing 78. The ~ircuit board 88 is inserted downwardly into the guide 86, causing the latch 84 to d~flect, to allow ent~y, and spring rorward to re~a~n the board. The power cord 98 i~ ~ecured to a t~readed bos~ 122 by a fastener 124 and clamp 126, the clamp 126 engaging the cord 9~ and the fastener 124 driving the clamp downwardly against the boss 122.
The mokor 14 is lowered onto the cradle 100 and the bottom portion supported on the walls 112 in the motor well 108. The shaft end portion 38 is frictionally engaged w1th the bearing 78 and extended through an opening in the well 108 and below the support 30. The motor is ~ixedly connected to the support 30 ~olely by the ~ri~tional engagement between the shaft and th~ bearing. The friction ~orce is greater than the weight of the motor ~uch that when the support member is turned upside down, the motor will not Gome out of the bearing.
As shown best ~n Figure 5, mo'tor housing 12 i8 ~urned upside down so as to be upwardly open, wher~upon the upper bearing 114 is c~ptivated in the bearlng well 120 formed in the housing portion 22. The motor support 30 with the internal components preassembled thereto is turned upside down, lowered into the motor housing, upside down, and the support surface 66 peripherally seated against the flange 72. The upper end face 50 of the sleeve 46 i~ abutted against the upper housing portion 22. The motor ~upport 30 is then secured to the motor housing by engaging Rcrews with respective of the threaded screw bosses. The upper housing ~ection cap ~8 and handles 26 are then attached to the motor housing.
~ or as~embly of the ~tator and armatura, an insertion member 130 can be usedO The insertion member includes a cylindrical sleeve 132 which 1g adapted to seat about an ;-.
. ~ :
?' ~
'~ i ' .,' .: . - . . .
' ~ . . ~ , 2~ ~3~3 0~75-~0108 - 6 -annular shoulder 134 of the armature 34, and a ~rusto-conical sleeve portion 136 over which thQ magnet~ 5~ are dri~en, whereby the ~tator ~leeve 46 i8 coaxially positioned about the armature.
Whil& the above description constitutes the preferred embodiment o~ the invention, it will be appreciated that the invention is ~usceptible to modification, variation, and change w~thout departing from the proper cope or fair meaning of the accompanying claims.
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Claims (11)
1. A motor driven apparatus, comprising:
a housing having upper and lower portions arranged along a longitudinal axis and forming a hollow interior, the portions meeting substantially along a common plane transverse to said axis and defining a support surface;
a motor preassembly mounted as a unit to said support surface, said preassembly including a support member peripherally connected to the housing parts, an armature fixedly connected to said support member, and a stator disposed in coaxial relation to aid armature, said armature including an axial motor shaft having opposite end portions extending therefrom; and bearing means, engaging each of the respective shaft ends portion, for supporting the motor shaft for rotation relative to the housing.
a housing having upper and lower portions arranged along a longitudinal axis and forming a hollow interior, the portions meeting substantially along a common plane transverse to said axis and defining a support surface;
a motor preassembly mounted as a unit to said support surface, said preassembly including a support member peripherally connected to the housing parts, an armature fixedly connected to said support member, and a stator disposed in coaxial relation to aid armature, said armature including an axial motor shaft having opposite end portions extending therefrom; and bearing means, engaging each of the respective shaft ends portion, for supporting the motor shaft for rotation relative to the housing.
2. The apparatus as claimed in Claim 1 wherein said stator comprises a cylindrical sleeve including a pair of permanent magnets fixedly mounted thereto; and locating means, operating between the support member and stator, for positioning the magnets relative to said armature.
3. The apparatus as claimed in Claim 2 wherein said locating means includes an interengaging tab and notch in said support member and sleeve.
4. The apparatus as claimed in Claim 2 wherein said stator is mounted to said armature solely by magnetic force.
5. The apparatus as claimed In Claim 1 wherein said support member is integrally formed of polymeric material and includes a cradle for supporting a lower end portion of the armature.
6. The apparatus as claimed in Claim 5 wherein said cradle includes a cylindrical well, said bearing means includes a first bearing member mounted in said well, and said armature is fixedly connected to said support member by friction engagement by one axial end portion of said shaft.
7. The apparatus as claimed in Claim 6 wherein one of said housing portions includes a bearing well, said bearing means includes a second bearing member which receives the other axial end portion of said armature, said first and second bearing members positioning the axis of said shaft in coaxial relation to the longitudinal axis of said housing.
8. A method of assembling a motor driven apparatus, comprising the steps of:
forming a two-part housing having a hollow interior, the two housing parts meeting substantially along a common horizontal plane and forming a mounting flange, forming a support member having an outer periphery and a central cradle, supporting a motor armature having an axial shaft in the cradle and fixedly securing the armature to the support member, said step of securing including supporting one end portion of the shaft for rotation relative to the support member, coaxially locating a stator in encircling relation to the motor armature, the stator including a pair of permanent magnets, and inserting the support member into the interior of said housing and into fixed engagement with said mounting flange, said inserting including the step of supporting the other end portion of the shaft in a bearing for rotation relative to the housing.
forming a two-part housing having a hollow interior, the two housing parts meeting substantially along a common horizontal plane and forming a mounting flange, forming a support member having an outer periphery and a central cradle, supporting a motor armature having an axial shaft in the cradle and fixedly securing the armature to the support member, said step of securing including supporting one end portion of the shaft for rotation relative to the support member, coaxially locating a stator in encircling relation to the motor armature, the stator including a pair of permanent magnets, and inserting the support member into the interior of said housing and into fixed engagement with said mounting flange, said inserting including the step of supporting the other end portion of the shaft in a bearing for rotation relative to the housing.
9. The method as claimed in Claim 8, wherein said housing parts are arranged on a longitudinal axis with one of said parts forming an opening for receiving said support member, positioning the housing such that said opening is facing upwardly, positioning the support member generally horizontally with a mounting surface facing upwardly, the armature and stator being mounted to the upwardly facing surface, and the inserting step includes inverting the support member such that the mounting surface faces downwardly and into said opening.
10. The method as claimed in Claim 9 wherein the step of fixedly securing the armature includes captivating a roller bearing in said cradle, and frictionally engaging said one end portion of the shaft with said bearing, the frictional force of engagement being greater than the weight of the armature whereby to inhibit unwanted removal of the armature when the support member is inverted.
11. The method as claimed in Claim 9 wherein the step of mounting said stator includes angularly registering the permanent magnets of the stator about the armature, said stator being held to the armature on the support preassembly solely due to magnetic forces.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/983,791 | 1992-11-30 | ||
| US07/983,791 US5349785A (en) | 1992-11-30 | 1992-11-30 | Motor support for orbital polisher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2108323A1 true CA2108323A1 (en) | 1994-05-31 |
Family
ID=25530097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002108323A Abandoned CA2108323A1 (en) | 1992-11-30 | 1993-10-13 | Motor support for orbital polisher |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5349785A (en) |
| CA (1) | CA2108323A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5595531A (en) * | 1995-07-26 | 1997-01-21 | Ryobi North America | Random orbit sander having speed limiter |
| US5595532A (en) * | 1995-10-20 | 1997-01-21 | Waxing Corporation Of America, Inc. | Electrically-powered polisher |
| US6290587B1 (en) | 1995-10-20 | 2001-09-18 | Wilton Tool Company, Llc | Electrically-powered polisher |
| US5642008A (en) * | 1995-10-20 | 1997-06-24 | Waxing Corporation Of America, Inc. | Power tool motor assembly |
| US5678272A (en) * | 1995-10-20 | 1997-10-21 | Waxing Corporation Of America, Inc. | Power tool having a quick release system for attaching a working element |
| GB2323717B (en) * | 1997-02-27 | 1999-06-02 | Bosch Gmbh Robert | A hand tool machine |
| DE10000702A1 (en) | 2000-01-10 | 2001-07-12 | Bosch Gmbh Robert | Angle grinder housing assembly comprises hard-wearing insert fixed between body shells and fitted with spindle socket using grinder arm in double-tee section for fixers. |
| US7047585B2 (en) | 2002-04-02 | 2006-05-23 | Wmh Tool Group, Inc. | Power tool |
| USD475908S1 (en) * | 2002-06-07 | 2003-06-17 | Wmh Tool Group, Inc. | Power tool |
| US6971951B2 (en) * | 2002-09-19 | 2005-12-06 | Wmh Tool Group, Inc. | Power tool with portable power source |
| US8508084B2 (en) * | 2008-06-26 | 2013-08-13 | Techtronic Power Tools Technology Limited | Power tool including hybrid electric motor design |
| US8628380B2 (en) | 2009-07-14 | 2014-01-14 | Tai-Her Yang | Direct motor-drive portable angle grinder |
| USD832316S1 (en) * | 2017-02-07 | 2018-10-30 | Rapala Vmc Corporation | Ice auger |
| USD936116S1 (en) * | 2020-02-06 | 2021-11-16 | Rapala Vmc Oyj | Ice auger |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3520090A (en) * | 1968-01-29 | 1970-07-14 | Donald Lee | Surface finishing machine |
| US3617786A (en) * | 1970-05-13 | 1971-11-02 | Black & Decker Mfg Co | Electric motor commutator end construction |
| US4017964A (en) * | 1974-10-12 | 1977-04-19 | Firma Schulte Elektrotechnik Kg | Method of manufacturing electrical machinery having a rotor |
| AU1688676A (en) * | 1976-08-16 | 1978-02-23 | Gakken Co Ltd | Miniature electric motors |
| DE2816671A1 (en) * | 1978-04-18 | 1979-10-31 | Bosch Gmbh Robert | ELECTRIC GENERATOR |
| US4188682A (en) * | 1978-04-28 | 1980-02-19 | Burglin Robert E | Automobile cleaning and waxing tool |
| US4342929A (en) * | 1979-07-13 | 1982-08-03 | Black & Decker Inc. | Electric motor wherein low temperature polymeric housing supports heat dissipating portions through heat resisting polymeric bridging member |
| US4491752A (en) * | 1983-03-31 | 1985-01-01 | Black & Decker Inc. | Electrical connection system for switches |
| US4520284A (en) * | 1983-08-12 | 1985-05-28 | Eaton Corporation | Rolled housing for eddy current coupling |
| FR2551930B1 (en) * | 1983-09-09 | 1986-11-14 | Black & Decker Inc | FUNCTIONAL UNIT FOR AN ELECTRIC MOTOR APPARATUS SUCH AS A POWERED TOOL OR HOUSEHOLD APPLIANCE; ELECTRIC MOTOR APPARATUS USING SUCH A UNIT; COMPONENT AND METHOD FOR MANUFACTURING SUCH A UNIT |
| US4791694A (en) * | 1987-05-22 | 1988-12-20 | Waxing Corporation Of America, Inc. | Cleaning and waxing tool for automobiles, vans, etc. |
| US4885496A (en) * | 1987-07-24 | 1989-12-05 | Black & Decker Inc. | Stator end member and assemblies therewith and methods of assembly |
| DE3825035B4 (en) * | 1988-07-09 | 2006-11-23 | Flux-Geräte GmbH | Brushless, electrically commutated motor for a drum or a container pump to Betieb on an AC voltage network |
| US4934041A (en) * | 1988-07-27 | 1990-06-19 | Nidec Corporation | Method of assembling brushless electric motors |
| US4910420A (en) * | 1988-07-27 | 1990-03-20 | Nidec Corporation | Brushless electric motor |
| GB2222318A (en) * | 1988-08-24 | 1990-02-28 | Johnson Electric Ind Mfg | Rotor in an electric motor |
| US5023999A (en) * | 1990-08-09 | 1991-06-18 | Ryobi Motor Products Corp. | Unitized tool construction |
-
1992
- 1992-11-30 US US07/983,791 patent/US5349785A/en not_active Expired - Lifetime
-
1993
- 1993-10-13 CA CA002108323A patent/CA2108323A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US5349785A (en) | 1994-09-27 |
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Legal Events
| Date | Code | Title | Description |
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| FZDE | Dead |