CN101737392B - Push nut and motor using same - Google Patents
Push nut and motor using same Download PDFInfo
- Publication number
- CN101737392B CN101737392B CN200910152130.6A CN200910152130A CN101737392B CN 101737392 B CN101737392 B CN 101737392B CN 200910152130 A CN200910152130 A CN 200910152130A CN 101737392 B CN101737392 B CN 101737392B
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- pushing tow
- tow nut
- cylindrical portion
- claw
- extension
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- 210000000078 claw Anatomy 0.000 claims abstract description 63
- 238000004080 punching Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 15
- 230000037431 insertion Effects 0.000 abstract description 15
- 238000005192 partition Methods 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 230000035515 penetration Effects 0.000 description 6
- 230000004323 axial length Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 229920010524 Syndiotactic polystyrene Polymers 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A pushing nut and a motor using the same are provided to prevent the pushing nut from falling off from an engaged member. The structure of the pushing nut is as follows: an annular base part (51), a plurality of extending parts (52) which are arranged on the circumferential direction of the base part (51) and extend towards the center (O) side of the base part (51), sharp claw parts (52b) are arranged on the extending parts (52), only the claw parts (52b) are clamped on the reducing part (12) of the cylindrical part (10) which inserts the insertion hole (53) of the base part (51), the contact area with the reducing part (12) is reduced to increase the biting force of the claw parts (52b) towards the reducing part (12), and the pushing nut (50) is reliably clamped on the reducing part (12).
Description
Technical field
The present invention relates to the motor of pushing tow nut (push nut) and use pushing tow nut.
Background technique
As the engagement body (pushing tow nut) used when parts are connected to each other, such as, in patent documentation 1, has disclosure.
Patent documentation 1: Japanese Patent Laid-Open 2004-156757 publication
Fig. 6 is the figure of the pushing tow nut 100 illustrated disclosed by patent documentation 1, Fig. 6 (a) is the plan view of pushing tow nut 100, Fig. 6 (b) is the side view of pushing tow nut 100, and Fig. 6 (c) represents the sectional view using pushing tow nut 100 to secure the state of the axle 120 as engaged part on surface plate 110.
Pushing tow nut 100 disclosed by patent documentation 1 is arranged on the front end 121 of the axle 120 run through by the patchhole 111 of surface plate 110, uses in surface plate 110 with the link of axle 120.
Pushing tow nut 100 has the protrusion tab 102 outstanding from peripheral portion 101 towards center side, and at the central part of pushing tow nut 100, the patchhole 103 that the front end 121 for axle 120 is inserted is formed by the front end 102a of each protrusion tab 102.
The same direction of each protrusion tab 102 from peripheral portion 101 towards axis is given prominence to, can resiliently deformable.
Pushing tow nut 100 by make the front end 102a of each protrusion tab 102 nip axle 120 outer circumferential face and fixing in this case, to be abutted with surface plate 110 by peripheral portion 101 on an axis 120, surface plate 110 and axle 120 can be maintained under connecting state.
But, because the area of contact of the front end 102a of protrusion tab 102 and the front end 121 of axle 120 is comparatively large, therefore make 102a the nip size of its unit area of power of outer circumferential face of axle 120 in front end reduce, 102a the nip degree of depth of outer circumferential face of axle 120 in front end reduces.Therefore, fixing for pushing tow nut 100 power on an axis 120 died down, pushing tow nut 100 is easily thrown off from axle 120, sometimes cannot maintain the connecting state of surface plate 110 and axle 120.
Therefore, as shown in phantom in FIG., can consider to form annular slot 122 on the front end 121 of axle 120, to fix on an axis 120 in the pawl engagement groove 122 of the front end 102a of pushing tow nut 100 embedding ring-type, but this needs the operation being used for forming pawl engagement groove 122 on front end 121, and fabricating cost can rise.In addition, when pushing tow nut 100 is installed on an axis 120, be difficult to confirm whether the front end 102a of protrusion tab 102 embeds pawl engagement groove 122.
Summary of the invention
The object of the invention is to stop the pushing tow nut be arranged on spindle unit to come off.
Pushing tow nut of the present invention comprises: have the base portion of patchhole, on the patchhole direction of base portion, be provided with extension that is multiple and that stretch out towards the central side of base portion, extension is provided with sharp-pointed claw, only locking pawl in the engaged member of inserting base portion.
, it is preferable that, pushing tow nut is formed by the punching press stamping-out of plate-shaped member herein, and the side that extension passes towards the drift of punching press stamping-out is stretched out.
During such formation, the abutment portion abutted with engaged member of claw does not exist turned-down edge, and the edge that punching press stamping-out is formed can be used as claw and to nip spindle unit, therefore, pushing tow nut reliably can be arranged in engaged member, reliably stop pushing tow nut to come off from engaged member.
In addition, it is preferable that, by making the forward end of extension curling along width direction, making the width direction both sides of the front end of extension become claw, observe from inserting direction, the front end of claw is positioned at the inner side in the cross section of engaged member.
During such formation, claw can be made reliably to nip the side of engaged member, thus pushing tow nut can be stoped more reliably to come off from engaged member.In addition, owing to making extension curling, therefore resist the intensity increase acting on the stress of root side from claw, extension can be prevented to be out of shape.This is because compared with when extension being formed as plane and do not make it curling, extension increases the intensity of resistance to deformation.
In addition, it is preferable that, engaged member forms by the material that hardness ratio pushing tow nut is little.When adopting such structure, the front end of the claw of pushing tow nut can be made reliably to nip cylindrical portion.
In addition, the present invention is the motor using pushing tow nut, have: be set in the stator in body shell shape all-in-one-piece cylindrical portion, can with rotatably by rotor that the axle that cylindrical portion supports rotates integrally, the periphery of cylindrical portion arranges engaging protuberance, and formed on stator and the engaging recessed part engaging protuberance and engage, stator is abutted with the stepped part of cylindrical portion in one end axially of cylindrical portion, and utilizes the other end carrying out support stator with the base portion making claw be engaging in the pushing tow nut that the form in cylindrical portion is installed.
During such formation, pushing tow nut is arranged only to make the front end of claw be engaging in state in cylindrical portion, less with the area of contact of cylindrical portion, therefore, makes the nip power of unit area of cylindrical portion of the front end of claw become large.Thus, the pushing tow nut of throwing off from cylindrical portion for preventing stator to be nipped cylindrical portion and be reliably arranged on cylindrical portion dearly by the front end of claw, can reliably stop stator to come off from cylindrical portion.
In addition, engaged with the engaging recessed part be arranged on stator by the engaging protuberance be arranged in cylindrical portion, pushing tow nut can not rotate relatively with cylindrical portion, therefore, cylindrical portion can not occur by the situation of claw scraping.
In addition, pushing tow nut is arranged in annular slot, and this annular slot is arranged between the periphery of cylindrical portion and the inner circumferential of stator.
During such formation, cylindrical portion axially can make rotor and stator close, and the axial length of cartridge need not be lengthened in order to ensure the space of installing pushing tow nut.Therefore, the axial extent of motor can be reduced.
In addition, it is preferable that, the external diameter of the base portion of pushing tow nut and the external diameter of annular slot are configured to roughly the same diameter.
When adopting such structure, when stator is for moving towards the direction of throwing off from cylindrical portion, can act on base portion towards the stress on the direction that radial outside expands at the base portion of pushing tow nut, but due to the inner peripheral surface of annular slot can be utilized to support this stress, therefore need not in order to increase the radial thickness of base portion to resistance to stress.
During such formation, even if be configured near stator by pushing tow nut, also can avoid the impact of the magnetic force on stator.
According to the present invention, only make the sharp-pointed claw of the front end of extension be engaging in engaged member, therefore, less with the area of contact of engaged member, the nip power of engaged member of claw that makes of per unit contact area becomes large.Therefore, pushing tow nut can be made reliably to be engaging in engaged member, stop pushing tow nut to come off from engaged member.
Accompanying drawing explanation
Fig. 1 is the sectional view of the motor involved by mode of execution.
Fig. 2 is the stereogram that the axle of motor involved by mode of execution supports partition.
Fig. 3 is the major component enlarged view of the motor involved by mode of execution.
Fig. 4 is the figure of the pushing tow nut represented involved by mode of execution.
Fig. 5 represents the figure by the stamping-out parts obtained plate-shaped member punching press stamping-out.
Fig. 6 is the figure representing the pushing tow nut that conventional example relates to.
(symbol description)
1 outer rotor type motor
2 housings
3 axles support partition
4 motor casings
10 cylindrical portion
11 wide diameter portions
12 diameter reducing parts
13 steps
14 penetration holes
15 bearing cages
16 engaging protuberances
20 oil sealings
21,22 bearings
23 pushing tow nut insertion grooves
30 stators
31 yokes
32 coils
33,34 insulation divisions
35 barrels
36 rotor cylinders
37 permanent magnets
38 rotors
40 axles
50 pushing tow nuts
50 ' stamping-out parts
51 base portions
52 extensions
52a front end
52b claw
53 patchholes
M motor
S seal space
Embodiment
Then, the mode of execution applying the present invention to outer rotor type motor is described.
Fig. 1 is the longitudinal section of the unitary construction of the outer rotor type motor 1 represented involved by mode of execution.
The housing 2 of outer rotor type motor 1 (being denoted as motor 1 below) is in the cylinder shape with the end comprising periphery wall 2a, and its opening portion is supported partition 3 by axle and covers, and forms motor casing 4.
Housing 2 and axle are supported partition 3 and are linked (bayonet engagement) by the bayonet fashion of the pawl using the upper multiple position of circumference successively, and realize spline with bolt etc.
Axle supports partition 3 and is made up of syndiotactic polystyrene (syndiotactic polystyrene) resin, has the outwardly projecting portion 5 towards the side evagination contrary with housing 2.Outwardly projecting portion 5 by the cylindrical shape concentric with axle 40 described later periphery wall 6, formed from the disc portion 7 that periphery wall 6 extends towards inner circumferential side, at the central part in disc portion 7, there is shaft sleeve part 8.Oil seal 20 is remain in shaft sleeve part 8.
In addition, support partition 3 from axle and extend cylindrical portion 10 in motor casing 4.Cylindrical portion 10 is connected with shaft sleeve part 8 by the wide diameter portion 11 of its root.
In the inside of shaft sleeve part 8, between wide diameter portion 11 and oil seal 20, be formed with seal space S.
A side end contrary with wide diameter portion 11 of cylindrical portion 10 is formed with diameter reducing part 12, diameter reducing part 12 is provided with pushing tow nut 50 described later in the mode of sheathed (inserting on the outer periphery).
Between the wide diameter portion 11 axially and diameter reducing part 12 of cylindrical portion 10, be provided with step 13, one end 31a of yoke 31 abuts with step 13.
As shown in Figure 2, on the outer circumferential face of cylindrical portion 10, the engaging protuberance 16 extending to step 13 from the cardinal extremity of diameter reducing part 12 circumferentially with 120 degree be arranged at intervals with three.
The width W 2 of step 13 side of engaging protuberance 16 is slightly wider than the width W 1 of diameter reducing part 12 side.
In the penetration hole 31c (with reference to Fig. 1) of the yoke 31 of the stator 30 be pressed into for cylindrical portion 10, the position corresponding with engaging protuberance 16 is provided with the not shown engaging recessed part waiting width.Therefore, when being assembled in the cylindrical portion 10 of engaged member by stator 30, stator 30 can be fixed in cylindrical portion 10 with the state of not rocking in a rotational direction.
As shown in Figure 1, cylindrical portion 10 has the penetration hole 14 supplying the axle 40 of rotor 38 described later to pass, and is provided with the bearing 21,22 of back shaft 40 at the two ends of penetration hole 14.Bearing 21,22 is cylindric sliding bearings, is configured at the end of penetration hole 14 with the bearing cage 15,15 of spot-facing shape enlarged-diameter in cylindrical portion 10.
Axle 40 supports partition 3 from penetration hole 14 through-shaft, and the annular knurl 41 of front end is projected into the outside of motor casing 4.
The periphery of cylindrical portion 10 is provided with press mode the stator 30 being wound with coil 32 on yoke 31, one end 31a of yoke 31 in the axial direction and the other end 31b is provided with insulation division 33,34.
Be combined with rotor cylinder 36 at axle 40 from diameter reducing part 12 end be projected in motor casing 4 of cylindrical portion 10, the barrel 35 of this rotor cylinder 36 is positioned at the outside of stator 30.Barrel 35 internal surface of rotor cylinder 36 is provided with permanent magnet 37 by bonding etc., and the inner peripheral surface of permanent magnet 37 is set to the spaced apart specified gap with the outer circumferential face of stator 30.
These rotor cylinders 36, permanent magnet 37, axle 40 define rotor 38, and this rotor 38 and stator 30 define motor M.
Axle support partition 3 be formed with passage 80 towards the side in motor casing 4.One end of passage 80 is towards seal space S opening, and the other end is towards the outer openings of motor casing 4, and the water bled in seal space S via oil sealing 20 can be discharged via the outside of passage 80 towards motor casing 4.
The following describes the link structure using pushing tow nut 50.
Fig. 3 (a) is the major component enlarged view of Fig. 1, and Fig. 3 (b) is the A-A direction view of Fig. 3 (a).Fig. 4 (a) is the plan view of pushing tow nut 50, and Fig. 4 (b) is the sectional view of the A-A line along Fig. 4 (a).
As shown in Fig. 3 (a), at the radial outside of the diameter reducing part 12 of cylindrical portion 10, the insulation division 33 of stator 30 is arranged to be surrounded by the outer circumferential face of diameter reducing part 12 at predetermined intervals, is formed from end on observation annular slot 23 (pushing tow nut insertion groove) in the form of a ring between the outer circumferential face and insulation division 33 of diameter reducing part 12.
In pushing tow nut insertion groove 23, pushing tow nut 50 is arranged on diameter reducing part 12, stops (fixing) stator 30 to come off from cylindrical portion 10 by moving axially of restriction stator 30 (yoke 31).
As shown in Figure 4, pushing tow nut 50 comprises: the extension 52 have the base portion 51 of the ring-type of patchhole, stretching out from the inner peripheral surface (periphery of patchhole) of base portion 51 towards O side, center.
The outside diameter d 1 of base portion 51 is roughly the same with the outside diameter d 2 (with reference to Fig. 3 (a)) of pushing tow nut insertion groove 23 (has a fixed gap, in case assembling operation is difficult to carry out), as shown in Fig. 3 (b), pushing tow nut 50 is arranged with the state making the outer circumferential face 51a of base portion 51 and abut with the inner peripheral surface 23a of pushing tow nut insertion groove 23.
The degree of depth of pushing tow nut insertion groove 23 is formed as making pushing tow nut 50 can not be projected into the axially outside of the front end 12a of diameter reducing part 12.
When not arranging pushing tow nut insertion groove 23, need the axial length lengthening cylindrical portion 10 (diameter reducing part 12), the base portion 51 of pushing tow nut 50 is abutted with the insulation division 33 of stator 30, by arranging pushing tow nut insertion groove 23, the axial length of cylindrical portion 10 (diameter reducing part 12) can be suppressed.
As shown in Fig. 4 (a), on the inner peripheral surface of base portion 51, extension 52 is equally spaced provided with three in the circumferential, and as shown in Fig. 4 (b), extension 52 is outstanding from base portion 51 towards same direction.
Carried out bending in the 52a side, front end of extension 52, the two side ends of the width direction of front end 52a is outstanding towards O side, center as sharp-pointed claw 52b, 52b.
Carry out bending, to make the diameter D1 being made up of the imaginary circles X of a part curvilinear front end 52a less than the outer diameter D (with reference to Fig. 3) of diameter reducing part 12, the curvature of the periphery of the ratio of curvature diameter reducing part 12 of the curve that front end 52a is formed is little, makes only have sharp-pointed claw 52b to contact with diameter reducing part 12.This is the area of contact in order to reduce extension 52 and diameter reducing part 12.
In addition, the claw 52b of each extension 52 be positioned at diameter slightly less than the outer diameter D of diameter reducing part 12, on the imaginary circles Y of diameter D2.When pushing tow nut 50 is set in diameter reducing part 12, the enlarged-diameter of the imaginary circles at claw 52b place to the outer diameter D of diameter reducing part 12, but for getting back on imaginary circles Y under the elastic force of extension 52.Therefore, nip diameter reducing part 12 in the front end of these claws 52b, pushing tow nut 50 is reliably fixed relative to diameter reducing part 12.
The plan view of the stamping-out parts 50 ' that Fig. 5 obtains by carrying out punching press stamping-out to the plate-shaped member of the SUS (stainless steel) as nonmagnetic substance, use in the manufacture of pushing tow nut 50.
In the stamping-out parts 50 ' by the shape shown in Fig. 5 of obtaining plate-shaped member punching press stamping-out, that is given prominence to by O side, Shi Chao center waits the 52a side, front end of the extension 52 of width curling and form pushing tow nut 50 along width direction.
Specifically, pushing tow nut 50 is formed like this: the thick direction shown in arrow in central lateral view, both sides distinguished in the width direction, the 52a side, front end of each extension 52 is bent and tilts, to make two side ends 52c outstanding towards O side, center.
Thus, as shown in Figure 4, the width direction two ends forming pushing tow nut 50, the front end 52a of its extension 52 are outstanding towards O side, center as sharp-pointed claw 52b, 52b.
In addition, the patchhole 53 that the diameter reducing part 12 being confession cylindrical portion 10 by the space of the O side, center of the claw 52b of each extension 52 encirclement is inserted.
Herein, the side that the drift that the extension 52 of stamping-out parts 50 ' uses in punching press stamping-out passes, i.e. overlap side tilt, and form pushing tow nut 50.
This is because so, in pushing tow nut 50, the edge section that punching press stamping-out is formed is positioned at the side towards patchhole 53 of extension 52, and this edge section becomes the claw 52b of extension 52, claw 52b can nip diameter reducing part 12 more reliably.
Herein, as shown in Figure 4, the extension 52 of pushing tow nut 50 can resiliently deformable diametrically, and when diameter reducing part 12 is inserted patchhole 53, extension 52 is towards radial outside flexure, and thus, pushing tow nut 50 can not be extended portion 52 towards the installation of diameter reducing part 12 and hinder.
In addition, after installing towards diameter reducing part 12, the diameter D2 of imaginary circles Y formed owing to linking claw 52b is less than the outer diameter D of diameter reducing part 12, and therefore, pushing tow nut 50 to be nipped the configuration of diameter reducing part 12 state to make the front end of claw 52b.
The pushing tow nut 50 of formation described above only makes the outer circumferential face of the front end of claw 52b and diameter reducing part 12 locking, therefore, make claw 52b nip diameter reducing part 12 outer circumferential face its unit area of power on size become large.Thus, claw 52b can nip diameter reducing part 12 dearly, and pushing tow nut 50 can be stoped ideally to come off from cylindrical portion 10 (diameter reducing part 12).
Herein, cylindrical portion 10 (diameter reducing part 12) in mode of execution is equivalent to " engaged member " of the present invention, claw 52b, 52b of extension 52 are equivalent to " claw " of the present invention, step 13 is equivalent to " stepped part " of the present invention, and pushing tow nut insertion groove 23 is equivalent to " annular slot " of the present invention.
As mentioned above, in embodiments, pushing tow nut comprises: have the base portion 51 of patchhole 53, on the patchhole direction of base portion 51, be provided with extension 52 that is multiple and that stretch out towards the O side, center of base portion 51, extension 52 arranges sharp-pointed claw 52b, only locking pawl 52b on the diameter reducing part 12 of the cylindrical portion 10 of being inserted by the patchhole 53 of base portion 51.
Thus, pushing tow nut 50 is installed only to make the front end of claw 52b be engaging in state on the diameter reducing part 12 of cylindrical portion 10.Herein, due to less with the area of contact of diameter reducing part 12, the nip power of diameter reducing part 12 of claw 52b that makes therefore on per unit contact area becomes large.
Therefore, pushing tow nut 50 can be made reliably to be engaging on diameter reducing part 12, stop pushing tow nut 50 to come off from diameter reducing part 12.In embodiments, because pushing tow nut 50 is thrown off from cylindrical portion 10 for preventing stator 30, the connecting state of cylindrical portion 10 and stator 30 therefore can be maintained.
In addition, due to pushing tow nut 50 can be made reliably to be engaging on diameter reducing part 12, therefore need not arrange as the pushing tow nut involved by conventional example for making pushing tow nut 50 be engaging in pawl engagement groove on diameter reducing part 12.Therefore, the shape of the metal pattern used in the making of cylindrical portion 10 also can not become complicated.
In addition, pushing tow nut 50 is formed by the punching press stamping-out of sheet metal parts, and side, i.e. overlap side that extension 52 passes towards the drift of punching press stamping-out are stretched out.
Thus, the edge section that punching press stamping-out is formed becomes the claw 52b be engaging on diameter reducing part 12, and claw 52b does not exist turned-down edge, can nip diameter reducing part 12 in the edge of claw 52b.Therefore, pushing tow nut 50 is engaging on the diameter reducing part 12 of cylindrical portion 10 more reliably, and pushing tow nut 50 is reliably stoped from coming off of diameter reducing part 12, therefore, can maintain the link of cylindrical portion 10 that pushing tow nut 50 carries out and stator 30.
In addition, in the stamping-out parts 50 ' by obtaining sheet metal parts punching press stamping-out, bending is utilized to make to wait the 52a side, front end of the extension 52 of width curling along width direction, thus the width direction two ends of the front end 52a of extension 52 are formed as towards the outstanding claw 52b in the O side, center of pushing tow nut 50, from axially observing, the front end of the claw 52b of extension 52 is positioned on the imaginary circles Y of the diameter D2 less than the outer diameter D of diameter reducing part 12.
Thus, claw 52b nips diameter reducing part 12, reliably can be arranged on diameter reducing part 12 by pushing tow nut 50, stops pushing tow nut 50 to come off from diameter reducing part 12.In addition, owing to making extension 52 curling, therefore, resist the intensity increase acting on the stress of root side (base portion 51 side of extension 52) from claw 52b, extension 52 can be prevented to be out of shape.This is because compared with when extension 52 being formed as plane and do not make it curling, the intensity of extension 52 pairs of resistance to deformations increases.
In addition, form claw 52b, 52b owing to carrying out bending by the extension 52 of reciprocity width, therefore need not in order to form the shape that the drift of punching press stamping-out is formed as complicated by claw 52b.Therefore, pushing tow nut can be provided at an easy rate.
In addition, have and use the motor M of the combined structure of pushing tow nut 50 to comprise: be set in the stator 30 supported with the axle of motor casing 4 in partition 3 shape all-in-one-piece cylindrical portion 10, the rotor 38 that can rotate integrally with the axle 40 rotatably supported by cylindrical portion 10, the combined structure of motor M is on the periphery of cylindrical portion 10, arrange engaging protuberance 16, and formed on stator 30 and the engaging recessed part engaging protuberance 16 and engage, stator 30 (yoke 31) is abutted with the step 13 of cylindrical portion 10 at one end 31a axially of cylindrical portion 10, and utilize the other end 31b carrying out support stator 30 (yoke 31) with the base portion 51 only making claw 52b be engaging in the pushing tow nut 50 that the form on diameter reducing part 12 is installed.
Thus, the claw 52b of pushing tow nut 50 and the area of contact of diameter reducing part 12 diminish, and make the nip power of diameter reducing part 12 of claw 52b become large, therefore, pushing tow nut 50 can reliably be arranged on diameter reducing part 12 (cylindrical portion 10).Therefore, the pushing tow nut 50 being used for preventing stator 30 from throwing off from cylindrical portion 10 reliably can be arranged on diameter reducing part 12, can reliably stop stator 30 to come off from cylindrical portion 10.
In addition, owing to being reliably arranged on diameter reducing part 12 by pushing tow nut 50, therefore pawl engagement groove need not be formed as in the past.Therefore, in order to form pawl engagement groove, the shape forming the metal pattern used when the axle be integrally formed with cylindrical portion 10 supports partition 3 need not be formed as more complicated shape, the reduction of the fabricating cost of metal pattern can be realized.
In addition, also as in the past, pawl engagement groove need not be absorbed in the claw 52b of pushing tow nut 50 and confirm, therefore can carry out the assembling of motor more easily.
In addition, engaged with the engaging recessed part be arranged on stator 30 by the engaging protuberance 16 be arranged in cylindrical portion 10, pushing tow nut 50, cylindrical portion 10 can not rotate relatively with stator 30, therefore, diameter reducing part 12 can not occur by the situation of claw 52b scraping.
In addition, pushing tow nut 50 is arranged in pushing tow nut insertion groove 23, this pushing tow nut insertion groove 23 be arranged on cylindrical portion 10 diameter reducing part 12 and between the insulation division 33 of the stator 30 of the radial outside of this diameter reducing part 12.
Thus, the axial length of cylindrical portion 10 need not be lengthened in order to ensure the space of installing pushing tow nut 50, rotor 38 and stator 30 axially can be made close in cylindrical portion 10.Therefore, the axial extent of motor M can not increase because installing pushing tow nut 50, can reduce the axial extent of motor M.
In addition, the outside diameter d 1 of the base portion 51 of pushing tow nut 50 is configured to roughly the same with the outside diameter d 2 of pushing tow nut insertion groove 23.
At stator 30 for towards time mobile from the direction that cylindrical portion 10 comes off (left Fig. 3), can act on base portion 51 towards the stress on the direction that radial outside expands at the base portion 51 of pushing tow nut 50.If the outside diameter d 2 of the outside diameter d 1 of the base portion 51 of pushing tow nut 50 and pushing tow nut insertion groove 23 is set to roughly the same diameter, then can carry out supporting role in the stress of base portion 51 with the inner peripheral surface 23a of pushing tow nut insertion groove 23.Therefore, the radial thickness t of base portion 51 need not be increased in order to make base portion 51 be able to take stress, the size of pushing tow nut 50 can be reduced.
In above-mentioned mode of execution, in the stamping-out parts 50 ' of the shape shown in Fig. 5 (a), make each extension 52 curling along width direction with the form making two side ends 52c outstanding towards O side, center, thus form claw 52b, but extension 52 also can be made curling with the form making two side ends 52c outstanding towards the direction left from center O, only make the central part of the width direction of the front end 52a of extension 52 become claw.In this case, also reliably to nip diameter reducing part 12 as claw in the edge section that punching press stamping-out is formed, therefore, can play the effect identical with during above-mentioned mode of execution.
In addition, in the above-described embodiment, illustrative is the structure that each extension 52 is formed to wait width in the stamping-out parts 50 ' of the shape shown in Fig. 5 (a), but as long as extension 52 is by the curling shape forming sharp-pointed claw of 52a side, front end, then both can be formed as from base portion 51 side towards 52a side, front end narrowed width, and also can be formed as broadening from base portion 51 side towards 52a side, front end width.
In addition, in the above-described embodiment, claw 52b is only had to nip diameter reducing part 12, therefore, even if do not arrange the such pawl engagement groove of conventional example on diameter reducing part 12, pushing tow nut 50 also can reliably be arranged on diameter reducing part 12, but in order to reliably install, the pawl engagement groove that front end 52a for extension 52 inserts also can be set on the outer circumferential face of diameter reducing part 12, claw 52b is nipped the bottom surface of pawl engagement groove.So, by locking in pawl engagement groove of the front end 52a of the nipping of claw 52b, extension 52, pushing tow nut 50 can be arranged on diameter reducing part 12 more reliably.
Claims (6)
1. a pushing tow nut, comprising: base portion, and this base portion has patchhole; And extension, this extension is provided with multiple on the patchhole direction of described base portion, and stretches out towards the central side of described base portion, and the forward end of described extension is curling along width direction, it is characterized in that,
The width direction both sides of the front end of described extension become sharp-pointed claw, only locking described claw on the outer circumferential face of the engaged member of being inserted by the patchhole of described base portion,
Described pushing tow nut is formed by the punching press stamping-out of plate-shaped member,
Insert on direction in described engaged member, the side that described extension passes towards the drift of described punching press stamping-out is stretched out,
Observe from the direction of inserting of described engaged member, the front end of described claw is positioned at the inner side in the cross section of described engaged member, and the virtual diameter of a circle being made up of a part the front end of described extension is less than the external diameter of described engaged member.
2. pushing tow nut as claimed in claim 1, is characterized in that, described pushing tow nut metal is formed, and described engaged part forms by the material that pushing tow nut described in hardness ratio is little.
3. use a motor for pushing tow nut, have: stator, this stator sleeve is located at in body shell shape all-in-one-piece cylindrical portion; And rotor, this rotor can with rotatably rotated integrally by the axle that described cylindrical portion supports, the periphery of described cylindrical portion is provided with engaging protuberance, described stator is formed and the described engaging recessed part engaging protuberance and engage, described stator is abutted with the stepped part of described cylindrical portion in one end axially of described cylindrical portion, it is characterized in that
Described motor uses the pushing tow nut described in claim 1 or 2, and utilizes to make described claw be engaging in the base portion of the described pushing tow nut that the form in described cylindrical portion is installed to support the axially the other end in described cylindrical portion of described stator.
4. motor as claimed in claim 3, it is characterized in that, described pushing tow nut is arranged in annular slot, and this annular slot is arranged between the periphery of described cylindrical portion and the inner circumferential of described stator.
5. motor as claimed in claim 4, it is characterized in that, the external diameter of the base portion of described pushing tow nut and the external diameter of described annular slot are configured to roughly the same diameter.
6. motor as claimed in claim 4, is characterized in that, described pushing tow nut nonmagnetic substance is formed.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-291859 | 2008-11-14 | ||
| JP2008291859 | 2008-11-14 | ||
| JP2009079666A JP5281456B2 (en) | 2008-11-14 | 2009-03-27 | Push nut and coupling structure using push nut |
| JP2009-079666 | 2009-03-27 |
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| CN101737392A CN101737392A (en) | 2010-06-16 |
| CN101737392B true CN101737392B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910152130.6A Active CN101737392B (en) | 2008-11-14 | 2009-07-13 | Push nut and motor using same |
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| JP (1) | JP5281456B2 (en) |
| CN (1) | CN101737392B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5727190B2 (en) * | 2010-10-05 | 2015-06-03 | シャープ株式会社 | Motor housing of commutator motor |
| CA3121969A1 (en) * | 2018-12-03 | 2020-06-11 | Saint-Gobain Performance Plastics Pampus Gmbh | Push-on fastener, assembly, and method of making and using the same |
| JP7337122B2 (en) * | 2020-09-30 | 2023-09-01 | 株式会社リコー | Crawler type running body and running device |
| US20230373577A1 (en) * | 2020-09-30 | 2023-11-23 | Hiroshi Shimura | Crawler-type traveling body and traveling apparatus |
| CN112643326B (en) * | 2021-01-26 | 2022-10-21 | 江苏格纳特连接系统有限公司 | High efficiency pushes away nut structure |
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| CN1497189A (en) * | 2002-10-04 | 2004-05-19 | 文良洙 | Lock and dislock method and device of locking tube and exle |
| CN1862037A (en) * | 2005-05-13 | 2006-11-15 | 中部轴承株式会社 | Shaft retaining ring |
| CN201063485Y (en) * | 2007-05-18 | 2008-05-21 | 张文礼 | Torque adjustable electromagnetic braking motor |
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|---|---|---|---|---|
| JPS4533369Y1 (en) * | 1965-05-25 | 1970-12-19 | ||
| CA1134652A (en) * | 1977-05-03 | 1982-11-02 | Robert J. Holton | Stud retaining fastener and method for producing same |
| JPS6285709U (en) * | 1985-11-15 | 1987-06-01 | ||
| JP3875822B2 (en) * | 1999-03-12 | 2007-01-31 | 日本電産サンキョー株式会社 | Motor and rotating polygon mirror driving apparatus using the motor |
| JP4454732B2 (en) * | 1999-10-06 | 2010-04-21 | 石川島建材工業株式会社 | Fitting bracket |
| JP2001212773A (en) * | 2000-02-03 | 2001-08-07 | Ochiai:Kk | Nut removing tool and nut removing method using it |
| JP3869625B2 (en) * | 2000-05-12 | 2007-01-17 | 日本電産サンキョー株式会社 | Pump device |
| JP4526754B2 (en) * | 2002-04-17 | 2010-08-18 | 日産自動車株式会社 | clip |
| JP2004148011A (en) * | 2002-10-31 | 2004-05-27 | Inax Corp | Structure for attaching component to frp molded article for bathroom |
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- 2009-03-27 JP JP2009079666A patent/JP5281456B2/en active Active
- 2009-07-13 CN CN200910152130.6A patent/CN101737392B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1497189A (en) * | 2002-10-04 | 2004-05-19 | 文良洙 | Lock and dislock method and device of locking tube and exle |
| CN1862037A (en) * | 2005-05-13 | 2006-11-15 | 中部轴承株式会社 | Shaft retaining ring |
| CN201063485Y (en) * | 2007-05-18 | 2008-05-21 | 张文礼 | Torque adjustable electromagnetic braking motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101737392A (en) | 2010-06-16 |
| JP2010139063A (en) | 2010-06-24 |
| JP5281456B2 (en) | 2013-09-04 |
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