CN1607710A - Motor rotation axis, thrust bearing structure of motor rotation axis - Google Patents
Motor rotation axis, thrust bearing structure of motor rotation axis Download PDFInfo
- Publication number
- CN1607710A CN1607710A CN 200410078682 CN200410078682A CN1607710A CN 1607710 A CN1607710 A CN 1607710A CN 200410078682 CN200410078682 CN 200410078682 CN 200410078682 A CN200410078682 A CN 200410078682A CN 1607710 A CN1607710 A CN 1607710A
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- Prior art keywords
- rotation axis
- motor rotation
- thrust bearing
- burnishing
- thrust
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- 239000011347 resin Substances 0.000 claims abstract description 87
- 229920005989 resin Polymers 0.000 claims abstract description 87
- 238000005520 cutting process Methods 0.000 claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 17
- 230000033228 biological regulation Effects 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 229910003460 diamond Inorganic materials 0.000 claims description 10
- 239000010432 diamond Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 description 15
- 239000002994 raw material Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 208000034189 Sclerosis Diseases 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 238000010273 cold forging Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
Landscapes
- Sliding-Contact Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Provided is a process for manufacturing a rotary shaft of motor for manufacturing a high precision rotary shaft of motor while reducing the cost. An armature shaft 7 is provided, at one end thereof, with a surface 14a abutting against a resin member 30 provided on the gear housing 21 of a motor 1 and bearing its thrust load. The thrust bearing surface 14a is formed by burnishing a rough cutting surface of a specified shape. The armature shaft 7 also has a worm 13 meshing with a worm wheel 23.
Description
Technical field
The present invention relates to motor rotation axis, motor rotation axis thrust bearing structure, have the manufacture method of the motor and the motor rotation axis of reductor.
Background technology
All the time, as the thrust bearing structure of the motor rotation axis of motor, known have resin component element is set on the axle head of the motor rotation axis that can be supported rotatably by the shell of motor and utilizes this resin component element to bear the structure (for example with reference to patent documentation 1) of the thrust of motor rotation axis.This resin component element is by under the state in the blank part that inserts motor casing at the cephalic par with motor rotation axis, injects molten resin to this blank part and makes it to harden to form again.Resin component element is in when sclerosis owing to shrink along described cephalic par, therefore with identical cephalic par between form small space, thereby motor can be rotated, correctly located along thrust direction simultaneously.The cephalic par of motor rotation axis after utilizing rough cut to form the shape (cutting face) of regulation, is changed to meticulousr cutter with cutting tool for example by following manufacturing, implements smart cutting.
Patent documentation 1: special public clear 61-56701 communique
But well-known, the surface of processing part that is cut processing is because the cutting trace of residual cutting tool, and become matsurface, even carry out essence cutting, also can residual cutting trace on the cutting face, therefore be difficult to obtain high-precision roughness (minimum roughness) at end surface.In addition, because because of cut produces smear metal, so smear metal, just might enter between the end surface and resin component element of motor rotation axis when carrying out the motor assembling attached on the motor rotation axis.
When the roughness of the end surface of motor rotation axis is big, or smear metal is when having entered between end surface and the thrust bearing, rotational resistance during the motor rotation will increase, cause abnormal sound or generation of vibration, simultaneously, the eccentric wear that also can produce resin component element decreases and loosening problem when causing the motor rotation.In addition, the generation for the problem that prevents to cause because of smear metal is necessary in order to remove smear metal for example to clean operation, thereby causes the rising of manufacturing cost.
Summary of the invention
The present invention proposes in view of described problem, and one of purpose is, the thrust bearing structure of high-precision motor rotation axis, motor rotation axis is provided and has the motor of reductor.
In addition, two of purpose is that providing can be in the manufacture method that realizes producing when cost reduces the motor rotation axis of high-precision motor rotation axis.
In order to solve described problem, the present invention's 1 is, can be supported on the shell of motor rotatably and at one end have be located at described shell on thrust bear that member contacts and the motor rotation axis that bears the thrust bearing plane of this thrust load, it is characterized in that described thrust bearing plane is made of the burnishing-in machined surface of the cutting face that utilizes rough cut to form the regulation shape having been implemented burnishing-in processing.
The present invention's 2 feature is in the present invention's 1 invention of recording and narrating, to have and the worm gear engaged worm.
The present invention's 3 is, have the incorporating section that is formed on the shell that can support motor rotation axis rotatably and is inserted into the head end of described motor rotation axis, be located in the described incorporating section and bear thrust bearing structure from the motor rotation axis of the resin component element of the thrust of described motor rotation axis, it is characterized in that, form on described motor rotation axis and contact with described resin component element and bear the thrust bearing plane of this thrust load, this thrust bearing plane constitutes by the cutting face that utilizes rough cut to form the regulation shape having been implemented the burnishing-in machined surface that burnishing-in processes.
The present invention's 4 feature is, in the thrust bearing structure of the present invention's 3 motor rotation axis of recording and narrating, described resin component element has by the injection resin that injects to this incorporating section from the peristome that is communicated with formation with described incorporating section and harden.
The present invention's 5 feature is, in the thrust bearing structure of the motor rotation axis that the present invention's 3 records and narrates, described resin component element has the resin cap of the thrust bearing plane that covers described motor rotation axis, by the injection resin that injects between this incorporating section and described resin cap from the peristome that is communicated with formation with described incorporating section and harden.
The present invention's 6 is, possesses the motor that has reductor as the lower part, promptly, be formed at and support motor rotation axis rotatably and take in incorporating section on the shell of worm gear of the output of slowing down with this worm engaging with worm screw, be located in the described incorporating section and bear resin component element from the thrust of described motor rotation axis, can be supported rotatably and at one end have by described shell and contact with described resin component element and bear the motor rotation axis of the thrust bearing plane of this thrust load, it is characterized in that described thrust bearing plane is made of the burnishing-in machined surface of the cutting face that utilizes rough cut to form the regulation shape having been implemented burnishing-in processing.
The present invention's 7 feature is that in the present invention's 6 motor of recording and narrating that have reductor, described resin component element has by the injection resin that injects to this incorporating section from the peristome that is communicated with formation with described incorporating section and harden.
The present invention's 8 feature is, in the motor that have reductor that the present invention's 6 records and narrates, described resin component element has the resin cap of the thrust bearing plane that covers described motor rotation axis, by the injection resin that injects between this incorporating section and described resin cap from the peristome that is communicated with formation with described incorporating section and harden.
The present invention's 9 is, by the shell of motor can support rotatably and at one end have be located at described shell on thrust bear that member contacts and the manufacture method of motor rotation axis of bearing the thrust bearing plane of this thrust load, it is characterized in that, formed the cutting face of regulation shape at an end that utilizes cut at described motor rotation axis after, burnishing-in processing is implemented in this cutting face, become the described thrust bearing plane of burnishing-in machined surface.
The present invention's 10 feature is, in the manufacture method of the present invention's 9 motor rotation axis of recording and narrating, described burnishing-in processing is to be undertaken by utilizing pressing element with the plus-pressure of regulation to be pressurizeed in described cutting face.
The present invention's 11 feature is, in the manufacture method of the motor rotation axis that the present invention's 10 records and narrates, the plus-pressure of described pressing element to the cutting face is not set at and can produces diastrophic setting on described motor rotation axis because of the pressurization of this pressing element.
The present invention's 12 feature is, in the manufacture method of the present invention's 10 or 11 motor rotation axis of recording and narrating, the contact portion that contact with the cutting face of described pressing element is for being similar to dome shape.
The present invention's 13 feature is, in the manufacture method of the motor rotation axis of recording and narrating in 10～12 any of the present invention, the contact portion that contacts with the cutting face of described pressing element made with diamond.
(effect)
1,3,6 or 9 described inventions according to the present invention, because the thrust bearing plane of motor rotation axis forms the burnishing-in machined surface of the cutting face after the roughing having been implemented burnishing-in processing, therefore the concaveconvex shape of the cutting trace that is produced by cut etc. is just flattened and forms all simultaneously by burnishing-in processing.Promptly, processed face is compared with the situation of carrying out cut as fine finishining because therefore the cutting trace leveling that will be produced by the cutting tool of cut becomes the minimum all one sides of roughness, roughness is significantly improved, and the rotational resistance during the motor rotation reduces.In addition, owing to be not to utilize cut but utilize burnishing-in processing (plastic working) to carry out the fine finishining of thrust bearing plane, therefore can not produce smear metal ground and improve roughness, and can prevent that thrust bearing plane and thrust that smear metal is entrained into motor rotation axis from bearing between the member (resin component element).Consequently, can form high-precision motor rotation axis, can suppress by the roughness of thrust bearing plane or entrain into the thrust bearing plane and abnormal sound or the generation of vibration of thrust when bearing the motor rotation that the smear metal between the member (resin component element) causes, can also suppress thrust simultaneously and bear the generation that the eccentric wear of member (resin component element) decreases and prevent the loosening of motor rotation axis.
In addition, the thrust bearing plane is not owing to by carrying out the burnishing-in finishing to processing through the cutting face enforcement burnishing-in of rough cut, therefore just need to clean the operation of smear metal, thereby can reduce manufacturing cost when the fine finishining of thrust bearing plane.
2 described inventions according to the present invention, can make the engagement of motor rotation axis and worm gear, with the situation of worm gear engagement under, though as its reaction force, on motor rotation axis, produce thrust, but can prevent abnormal sound or vibration, decrease cause loosening and obtain quietly rotation by eccentric wear.
4 or 7 described inventions according to the present invention, resin component element has the injection resin that is injected into the incorporating section under a distolateral state that is inserted into the incorporating section of motor rotation axis, and this injection resin can shrink along be processed into all the thrust bearing plane of one side by burnishing-in when sclerosis.Consequently, can carry out the thrust position adjustment of motor rotation axis, the face that resin component element contact with motor rotation axis can be made simultaneously all one sides, thereby the motor rotation axis of generation becomes flexible can suppress the motor rotation time.
5 or 8 described inventions according to the present invention, the resin cap of the shape by selecting regulation, the contact-making surface that contacts with the thrust bearing plane of motor rotation axis in the resin component element (resin cap) can be made reliably all one sides, compare the rotational resistance in the time of to reduce the motor rotation more reliably with the situation that the roughness of identical contact-making surface is bigger.
10 described inventions according to the present invention, owing to burnishing-in processing is carried out in the cutting face after the rough cut by utilizing pressing element to pressurize with the plus-pressure of stipulating, therefore can push the concaveconvex shapes such as cutting trace that are formed on the cutting face well, form all one sides because of the cut generation.
11 described inventions according to the present invention can not produce the setting of deflection deformation because pressing element is set to the plus-pressure in cutting face on motor rotation axis, therefore can stably carry out burnishing-in and process on motor rotation axis.Particularly, when making motor rotation axis rotation, carry out under the situation of burnishing-in processing, can make and utilize the roughness of the machined surface that burnishing-in is processed to form further to improve.In addition, owing to can not be to applying irrational power, the therefore durability raising of the device that in burnishing-in processing, uses in order to carry out the instrument that burnishing-in processing uses.
12 described inventions according to the present invention, because the contact portion of tool member is made into approximate spherical shape, therefore in that being carried out burnishing-in, the cutting face adds man-hour, even the concaveconvex shape of cutting trace etc. is arranged on the cutting face, contact portion also can move smoothly along this concaveconvex shape, thereby processability improves.
13 described inventions according to the present invention, owing to form the part that contacts with the cutting face of pressing element with diamond, so can carry out burnishing-in processing to the cutting face well.
According to the present invention, the thrust bearing structure of high-precision motor rotation axis, motor rotation axis can be provided and have the motor of reductor.
In addition, can provide the manufacture method that when reducing cost, to make the motor rotation axis of high-precision motor rotation axis.
Description of drawings
Fig. 1 (a) is the profile of motor, (b) is the partial enlarged drawing of (a), (c) is the A-A line profile of (b).
Fig. 2 is the vertical view of motor rotation axis.
It (b) is the raw-material key diagram of axle that Fig. 3 (a) reaches.
Fig. 4 is the key diagram of the manufacturing sequence of motor rotation axis.
Fig. 5 is the key diagram of the manufacturing sequence of motor rotation axis.
Fig. 6 is the key diagram of the manufacturing sequence of motor rotation axis.
Fig. 7 is the key diagram of the manufacturing sequence of motor rotation axis.
Fig. 8 is the key diagram of the manufacturing sequence of motor rotation axis.
Among the figure: 1-is as the motor that has the motor of reductor, the 2-motor body, the 3-reduction part, 6-armature (armature), 7-is as the armature shaft of motor rotation axis, 13-worm screw, 14a-thrust bearing plane, the 14b-cutting face, 21-is as the gear housing of shell, and 21c-is as the patchhole of incorporating section, the 21e-peristome, the 23-worm gear, 30-bears the resin component element of member as thrust, the 31-resin cap, and 32-injects resin, 54-is as the burnishing-in instrument of pressing element, and 54a-is as the diamond of contact portion.
Embodiment
Below with reference to accompanying drawings execution mode that the present invention has been specialized is described.
The motor 1 of Fig. 1 (a) expression present embodiment.The motor 1 of present embodiment is the motor that uses as the drive source of Wiper apparatus for vehicle, is with motor body 2 and takes in the motor that has reducing gear of the reduction part 3 integrated assemblings of reducing gear.
Motor body 2 is made of DC motor, has the yoke of round-ended cylinder shape shell (yokehousing) 4 is arranged.Medial surface at yoke shell 4 is fixed with pair of magnet 5, can receive rotatably in the inboard of this magnet 5 armature 6 is housed.Armature 6 has armature shaft 7, core 8, spiral 9 and commutator 10.
About central portion of axle main body 11 becomes the core standing part 11a that is used for fixing core 8, is the commutator standing part 11b that is used for fixing commutator 10 than this core standing part 11a near the regulation position of head end side.
In addition, the base end part of axle main body 11 is cardinal extremity bearing portions 11c.Cardinal extremity bearing portions 11c is to be fixed in the part that the sliding bearing 15 of the bottom center of yoke shell 4 radially supports shown in Fig. 1 (a).
In addition, on the end face of axle main body 11 (cardinal extremity bearing portions 11c), be formed with the housing recess 11d of the cross section circle of the steel ball 16 that is used to take in the thrust of bearing armature shaft 7.
In addition, the cephalic par of axle main body 11, promptly about central portion of armature shaft 7 is central bearing portions 11e.The bearing portions 11e of central authorities is fixed in the part that the sliding bearing 22 on the gear housing 21 of reduction part 3 radially supports.
Part than the close head end side of the bearing portions 11e of these central authorities is the described path part 12 littler than axle main body 11 diameters.On this path part 12, be formed with worm screw 13.And, the external diameter of this worm screw 13 than the diameter of central bearing portions 11e (axle main body 11) more ninor feature become.
The head end bearing portions 14 that is formed at the cephalic par of path part 12 is inserted into the patchhole 21c as the incorporating section, and radially supported by this patchhole 21c, wherein patchhole 21c is formed on the gear housing 21 as the shell that can support armature shaft 7 rotatably.On the end surface of this head end bearing portions 14, the outer peripheral edges chamfering is formed with the thrust bearing plane 14a as the burnishing-in machined surface.The cephalic par of head end bearing portions 14 is made into approximate truncated cone shape.
Shown in Fig. 1 (b), in patchhole 21c, be equipped with the resin component element 30 that bears member as thrust.Resin component element 30 have the cephalic par of being located at armature shaft 7 resin cap 31, be located at inaccessible in the patchhole 21c and the interior injection resin 32 in space (incorporating section) that forms by this resin cap 31.In addition, shown in Fig. 1 (c), in patchhole 21c, be formed with the intercommunicating pore 21d that is communicated with this patchhole 21c, intercommunicating pore 21d by peristome 21e to outside opening.And, have patchhole 21c and resin component element 30 as the incorporating section, constitute bearing of motor structure of the present invention.
In addition, on the core standing part 11a of this kind armature shaft 7, be fixed with core 8, on commutator standing part 11b, be fixed with commutator 10, coiling coil 9 on core of being fixed 8 and commutator 10 and constitute armature 6.In addition, in the housing recess 11d of the base end part of armature shaft 7, bear the steel ball 16 of the thrust of this armature shaft 7 and received dress with the outstanding state in part.This kind armature 6 inserts the cardinal extremity bearing portions 11c of armature shaft 7 in the sliding bearing 15 of yoke shell 4 bottoms, and steel ball 16 bears dull and stereotyped 17 with the thrust that is installed in this bottom and contacts, and is received to be contained in the yoke shell 4 of having fixed magnet 5.In addition, receiving the yoke shell 4 (motor body 2) of having adorned this armature 6 is assembled on the gear housing 21 (reduction part 3).
In addition, resin component element 30 following formation, under the resin cap 31 of the cephalic par of the head end bearing portions 14 that has coated armature shaft 7 according to the mode that covers thrust bearing plane 14a is inserted into state among the patchhole 21c, in the space by resin cap 31 obturations in patchhole 21c, the injection resin 32 of fusion is passed from peristome 21e, and intercommunicating pore 21d injects and curing.Inject resin 32 and solidify, integrated with resin cap 31, form resin component element 30.
Described reduction part 3 has gear housing 21.Gear housing 21 forms the regulation shape with an incorporating section 21a and cup-shaped of the worm gear incorporating section 21b that takes in worm gear 23, and its axis incorporating section 21a takes in from the head end side of the armature shaft 7 of described motor body 2 extensions.
At the base end part of axle incorporating section 21a, be fixed with the sliding bearing 22 of the central bearing portions 11e that radially supports armature shaft 7.The cephalic par of the head end bearing portions 14 of armature shaft 7 (path part 12) is inserted into the cephalic par of incorporating section 21a, is formed for supporting vertically the patchhole 21c of this cephalic par.And when being assembled in described motor body 2 on the gear housing 21, the head end side of armature shaft 7 (worm screw 13 and head end bearing portions 14) is inserted in the sliding bearing 22 and is accommodated in the incorporating section 21a.At this moment, the external diameter of worm screw 13 is owing to the external diameter than central bearing portions 11e, and promptly the internal diameter of sliding bearing 22 is littler, so this worm screw 13 just can not contact with sliding bearing 22 inner peripheral surfaces.
In the 21b of worm gear incorporating section, can receive the worm gear 23 that is equipped with worm screw 13 engagement of armature shaft 7 rotatably.On worm gear 23, be provided with output shaft 24 according to the mode of integrated rotation.
In addition, on gear housing 21 and position that motor body 2 is faced mutually, be fixed with brushgear 25.On brushgear 25, maintain power supply brush 26 with described commutator 10 sliding contacts.Brushgear 25 receives power supply by not shown supply lines and supplies with from the outside, thereby this power supply is supplied with to armature 6 (coil 9) by power supply brush 26 and commutator 10.Like this, since armature 6 rotations, armature shaft 7 rotations, and by worm screw 13 and worm gear 23 rotating output shafts 24, wiper device will move according to the rotation of this output shaft 24.
(manufacture method)
Manufacture method to described armature shaft 7 describes below.
Described armature shaft 7 is to make with raw material 40 by processing columned metal axle as shown in Figure 3.Axle at first will use as shown in Figure 4 forging mold 41 with raw material 40, forms path part 12 and head end bearing portions 14 in the head end side, and the cold forging of implementing to be used at cardinal extremity end face formation housing recess 11d is made processing (Cold Forging).
Forging mold 41 be divided into two and the phase mutual connection from, have configuration axle with a pair of main body mould 41a (the main body mould 41a that only represents a side among Fig. 4) of raw material 40 be pushed into the interior sliding mould 45 of this main body mould 41.Main body mould 41a can be divided into the 1st～the 3rd mold 42～44 these 3 parts at axle again respectively with the axis direction of raw material 40 (sliding mould 45 push direction), crosses over this 1st～the 3rd mold 42～44 and has the axle shaping recess 41b that is used to form armature shaft 7.The 1st mold 42 has and is used to take exercise axle forms path part 12 and head end bearing portions 14 with the head portion of raw material 40 a path part recesses machined 42a.The 2nd mold 43 and the 3rd mold 44 constitute a shaping recess 41b by path part recesses machined 42a and axle body supports recess 43a, 44a, wherein path part recesses machined 42a is used for back shaft main body 11 when forming path part 12 by the 1st mold 42 on axle usefulness raw material 40.
On the other hand, sliding mould 45 can be located in the main body mould 41a slidingly and movingly, promptly in the axle body supports recess 44a.On this sliding mould 45, be formed with the columned main part 45a of the internal diameter roughly the same (smaller diameter) of axle body supports recess 44a and to the head end central portion of this main part 45a with the cylindric outstanding shaping protuberance 45b corresponding with described housing recess 11d.
Using main body mould 41a in the head portion formation path part 12 and head end bearing portions 14 of axle, form housing recess 11d at axle with on the cardinal extremity end face of raw material 40 by sliding mould 45 with raw material 40.
Then, as shown in Figure 5, in order to form the cardinal extremity bearing portions 11c of a main body 11 and the outer peripheral face of central bearing portions 11e accurately, make emery wheel 46 and the whole sliding contact of the outer peripheral face of axle main body 11, implement grinding to the outer peripheral face integral body of this main body 11.That is, utilize this grinding, the improvement of the roughness of the outer peripheral face of realization cardinal extremity bearing portions 11c and central bearing portions 11e and the raising of circularity.
In addition, as shown in Figure 6, the path part 12 of having implemented Cold Forging is sandwiched between the flat die thread rolling roller 47,, form worm screw 13 by making 47 rotations of flat die thread rolling roller or moving.
Thereafter, the end surface at head end bearing portions 14 forms thrust bearing plane 14a.
At first, armature shaft 7 is utilized known mechanism gripping cardinal extremity bearing portions 11c side and forms the state that rotates with the rotating speed of stipulating.
Then, as shown in Figure 7,, form cutting face 14b making cutting tool 53 contact and carry out rough cut when the end surface of the head end bearing portions 14 of rotation status slides.Cutting tool 53 is located on the not shown carriage, can slide along the roughly axis direction of axle main body 11 with from the direction that this axis direction tilts with predetermined angular and move.Rough cut for example is to the head end bearing portions 14 in the rotation, with cutting tool 53 at axis direction after head end bearing portions 14 moves along the X1 direction, along moving with the X2 direction that predetermined angular tilts from axis direction, when the X2 direction moves, cutting head end bearing part 14., it along with X1 direction parallel and opposite X3 direction moved, move, make cutting tool 53 get back to original position along the X4 direction parallel and opposite with the X2 direction thereafter.
In carriage change cutting tool 53 and as the burnishing-in instrument 54 of pressing element thereafter.The contact portion that burnishing-in instrument 54 contacts with cutting face 14b adopts the diamond 54a of approximate spherical shape.
In addition, as shown in Figure 8, contact when burnishing-in instrument 54 slides on the cutting face 14b of the head end bearing portions 14 of rotation status forms thrust bearing plane 14a, makes the armature shaft 7 of present embodiment.At this moment, burnishing-in instrument 54 is carried out pressing mode by the setting according to degree that can be crooked with armature shaft 7 to this armature shaft 7 and sets.Burnishing-in processing is for example with respect to the head end bearing portions 14 (armature shaft 7) in the rotation, burnishing-in instrument 54 by along axis direction after head end bearing portions 14 moves along the X11 direction, X12 direction along the predetermined angular that tilted from axis direction moves again, when the X12 direction moves, the cutting face 14b (with reference to Fig. 8) of correct end bearing part 14 carries out burnishing-in processing., it along with X11 direction parallel and opposite X13 direction moved, move, make cutting tool 54 get back to original position along the X14 direction parallel and opposite with the X12 direction thereafter.Because the thrust bearing plane of motor rotation axis is the side face that the head end of truncated cone shape attenuates, and therefore pressurizes as the burnishing-in instrument 54 of pressing element on the direction that the axis with motor rotation axis intersects.So plus-pressure is set to the setting that motor rotation axis can not occur bending and deformation.
(action effect of execution mode)
As mentioned above, according to present embodiment, following effect is arranged.
(1) in the present embodiment, owing to being used as the burnishing-in machined surface that the cutting face 14b that has carried out rough cut has been implemented burnishing-in processing, the thrust bearing plane 14a of armature shaft forms, therefore the concaveconvex shape of the cutting trace that is produced by cut forms all one sides because of burnishing-in processing is extruded.Promptly, because processed face can not produce the sheeter lines of cutting tool as cut, therefore just become the minimum all one sides of roughness, compare with the situation of carrying out cut as fine finishining, roughness is significantly improved, and the rotational resistance during the motor rotation diminishes.In addition, owing to be not to utilize cut but utilize burnishing-in processing (plastic working) to carry out the fine finishining of thrust bearing plane 14a, therefore can not produce smear metal ground and improve roughness, prevent that smear metal from being entrained between the thrust bearing plane 14a and resin component element 30 of armature shaft 7.Consequently, can form high-precision armature shaft 7, can suppress by the roughness of thrust bearing plane 14a or entrain into thrust bearing plane 14a and resin component element 30 between smear metal cause the motor rotation time abnormal sound or generation of vibration, can also suppress simultaneously the generation of the eccentric wear damage of resin component element 30, thereby prevent the loosening of motor rotation axis.
In addition, thrust bearing plane 14a is not owing to by carrying out the burnishing-in finishing to processing through the cutting face 14b enforcement burnishing-in of rough cut, therefore just need to clean the operation of smear metal, thereby can reduce manufacturing cost when the fine finishining of thrust bearing plane 14a.
(2) in the present embodiment, therefore armature shaft 7 can mesh with worm gear 23 owing to have worm screw 13.In addition, in armature shaft 7 with worm screw 13, might be because armature 6 and worm screw 13 formed directions, the formation of armature shaft 7 thrust load of a side of worm screw 13 become big, thereby resin component element 30 eccentric wears are decreased.Like this, carry out under the situation of positive and negative rotation at armature shaft 7, when counter-rotating, armature shaft 7 will conflict with resin component element 30, thereby produces the counter-rotating sound.But, in the present embodiment,, therefore can be suppressed at the eccentric wear that produces in the resin component element 30 and decrease, thereby can prevent planting here the counter-rotating sound because armature shaft 7 is made into high accuracy.
(3) in the present embodiment, resin component element 30 has the injection resin 32 that is injected into patchhole 21c under the state of the end of head end bearing portions 14 sides of armature shaft 7 insertion patchhole 21c, and this injection resin 32 can be along be processed into all thrust bearing plane 14a contractions (shrinking) of one side under the guiding state of thrust bearing plane 14a by burnishing-in when sclerosis.Consequently, the thrust position adjustment of armature shaft 7 can be carried out, thereby the loosening of armature shaft 7 that motor when rotation produce can be suppressed.
(4) in the present embodiment, the resin cap 31 of the shape by selecting regulation, the contact-making surface that contacts with the thrust bearing plane 14a of armature shaft 7 in the resin component element 30 can be made reliably all one sides, compare the rotational resistance in the time of to reduce the motor rotation more reliably with the situation that the roughness of identical contact-making surface is bigger.
(5) in the present embodiment, since by utilize burnishing-in instrument 54 with the plus-pressure of regulation pressurize come to by rough cut cutting face 14b carry out burnishing-in processing, therefore can push the concaveconvex shape of the cutting trace that is formed on the 14b of cutting face well, thereby form all one sides.
(6) in the present embodiment, can on armature shaft 7, not produce diastrophic setting, therefore can on armature shaft 7, stably carry out burnishing-in and process because burnishing-in instrument 54 is set to the plus-pressure of cutting face 14b.Particularly, when making armature shaft 7 rotations, carry out under the situation of burnishing-in processing the roughness of the machined surface (thrust bearing plane 14a) that utilizes burnishing-in to be processed to form further being improved.In addition, owing to can not be to applying irrational power, the therefore durability raising of the device that in burnishing-in processing, uses in order to carry out the instrument that burnishing-in processing uses.
(7) in the present embodiment, because the contact portion of burnishing-in instrument 54 adopts the diamond 54a of approximate spherical shape, therefore in that being carried out burnishing-in, cutting face 14b adds man-hour, even the concaveconvex shape of cutting trace is arranged on the 14b of cutting face, diamond 54a also can move smoothly along this concaveconvex shape, thereby processability improves.
(other examples)
And embodiments of the present invention also can followingly change.
In resin component element 30, though adopted the preference that the part of the thrust bearing plane 14a of armature shaft 7 contact is made as resin cap 31,, also can will be made as the injection resin with the part that contacts with thrust bearing plane 14a of resin component element 30.Like this, inject resin when sclerosis, because can be along be processed into all thrust bearing plane 14a contractions (under the guiding state of thrust bearing plane 14a, shrinking) of one side by burnishing-in, therefore can make the face that contacts with armature shaft 7 of resin component element form all one sides, thereby can be suppressed at produce when armature shaft 7 rotates loosening.In addition, resin component element is not limited to inject resin or resin cap, also can adopt the resin component element of other forms.
Though armature shaft 7 has adopted the structure with worm screw 13, also can adopt armature shaft (motor rotation axis) with worm screw.Even there is not the armature shaft of worm screw, also can obtain the action effect identical with present embodiment.
Add man-hour in that armature shaft 7 is carried out burnishing-in, though utilize 54 couples of cutting face 14b of burnishing-in instrument to pressurize when making armature shaft 7 rotations, burnishing-in processing is not limited to this mode.For example, also can not make armature shaft 7 rotations and carry out burnishing-in processing.
Though the contact portion that contacts with cutting face 14b (diamond 54a) of burnishing-in instrument 54 is made as approximate spherical shape, and the shape of contact portion is not limited thereto, and for example also can adopt roller component etc.In addition, though utilize diamond 54a that cutting face 14b is pressurizeed, the material of contact portion is not limited to diamond, also can adopt with axle and compare other material such as quite high steel ball of hardness with raw-material metal.
Though thrust bearing plane 14a has formed truncated cone shape at the head end of head end bearing portions 14, the thrust bearing plane is not limited to this shape, for example also can form coniform at the head end of head end bearing portions 14.
Claims (13)
1. motor rotation axis, rotatably be supported on the shell of motor, and at one end have be located at described shell on thrust bear that member contacts and the thrust bearing plane of bearing its thrust load, it is characterized in that described thrust bearing plane is made of the burnishing-in machined surface of the cutting face that utilizes rough cut to form the regulation shape having been implemented burnishing-in processing.
2. motor rotation axis according to claim 1 is characterized in that, has and the worm gear engaged worm.
3. the thrust bearing structure of a motor rotation axis, have: be formed on the shell that rotatably supports motor rotation axis and be inserted with the head end of described motor rotation axis the incorporating section, be located in the described incorporating section and bear resin component element from the thrust of described motor rotation axis, it is characterized in that, form on described motor rotation axis and contact with described resin component element and bear the thrust bearing plane of its thrust load, this thrust bearing plane constitutes by the cutting face that utilizes rough cut to form the regulation shape having been implemented the burnishing-in machined surface that burnishing-in processes.
4. the thrust bearing structure of motor rotation axis according to claim 3 is characterized in that, described resin component element has from be communicated with described incorporating section that the peristome that forms injects to this incorporating section and the injection resin that hardens.
5. the thrust bearing structure of motor rotation axis according to claim 3, it is characterized in that described resin component element has: cover the resin cap of the thrust bearing plane of described motor rotation axis, from be communicated with described incorporating section that the peristome that forms injects between this incorporating section and described resin cap and the injection resin that hardens.
6. motor that has reductor, have: be formed at rotatably to support and have the motor rotation axis of worm screw and take in incorporating section on the shell of worm gear of the output of slowing down with this worm engaging, be located in the described incorporating section and bear resin component element from the thrust of described motor rotation axis, rotatably be supported on the described shell and at one end have and contact with described resin component element and bear the motor rotation axis of the thrust bearing plane of its thrust load, it is characterized in that described thrust bearing plane is made of the burnishing-in machined surface of the cutting face that utilizes rough cut to form the regulation shape having been implemented burnishing-in processing.
7. the motor that has reductor according to claim 6 is characterized in that, described resin component element has from be communicated with described incorporating section that the peristome that forms injects to this incorporating section and the injection resin that hardens.
8. the motor that has reductor according to claim 6, it is characterized in that described resin component element has: cover the resin cap of the thrust bearing plane of described motor rotation axis, from be communicated with described incorporating section that the peristome that forms injects between this incorporating section and described resin cap and the injection resin that hardens.
9. the manufacture method of a motor rotation axis, this motor rotation axis rotatably be supported on the shell of motor and at one end have be located at described shell on thrust bear that member contacts and the thrust bearing plane of bearing its thrust load, it is characterized in that, after an end that utilizes cut at described motor rotation axis forms the cutting face of regulation shape, burnishing-in processing is implemented in this cutting face, become the described thrust bearing plane of burnishing-in machined surface.
10. the manufacture method of motor rotation axis according to claim 9 is characterized in that, described burnishing-in processing is to be undertaken by utilizing pressing element with the plus-pressure of stipulating to be pressurizeed in described cutting face.
11. the manufacture method of motor rotation axis according to claim 10 is characterized in that, described pressing element is not set to the plus-pressure in cutting face can produces the setting of deflection deformation because of the pressurization of this pressing element on described motor rotation axis.
12. the manufacture method of motor rotation axis according to claim 10 is characterized in that, the contact portion that contacts with the cutting face of described pressing element is approximate dome shape.
13. the manufacture method according to any described motor rotation axis in the claim 10～12 is characterized in that, the contact portion that contacts with the cutting face of described pressing element is made with diamond.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003353549 | 2003-10-14 | ||
| JP2003353549A JP2005124255A (en) | 2003-10-14 | 2003-10-14 | Rotary shaft of motor, its thrust bearing structure, motor with reduction gear and process for manufacturing rotary shaft of motor |
| JP353549/2003 | 2003-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1607710A true CN1607710A (en) | 2005-04-20 |
| CN100356659C CN100356659C (en) | 2007-12-19 |
Family
ID=34611805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100786824A Expired - Fee Related CN100356659C (en) | 2003-10-14 | 2004-09-16 | Motor rotation axis, thrust bearing structure of motor rotation axis |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005124255A (en) |
| CN (1) | CN100356659C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105121912A (en) * | 2013-01-08 | 2015-12-02 | 罗伯特·博世有限公司 | Shaft thrust arrangement and actuating drive |
| CN105889419A (en) * | 2015-02-13 | 2016-08-24 | Ims齿轮有限公司 | Plastic Element for Lash-Free Support |
| CN107768981A (en) * | 2016-08-17 | 2018-03-06 | 日本特殊陶业株式会社 | Spark plug |
| CN115768989A (en) * | 2020-07-06 | 2023-03-07 | 伊格尔工业股份有限公司 | Sliding member |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467611A (en) * | 1977-11-09 | 1979-05-31 | Nippon Denso Co Ltd | Method of positioning output shaft of motor |
| JPH057970A (en) * | 1991-06-18 | 1993-01-19 | Toshiba Corp | Manufacture of rotary shaft |
-
2003
- 2003-10-14 JP JP2003353549A patent/JP2005124255A/en active Pending
-
2004
- 2004-09-16 CN CNB2004100786824A patent/CN100356659C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105121912A (en) * | 2013-01-08 | 2015-12-02 | 罗伯特·博世有限公司 | Shaft thrust arrangement and actuating drive |
| CN105121912B (en) * | 2013-01-08 | 2018-11-27 | 罗伯特·博世有限公司 | Axis thrust brake and servo-actuating device |
| CN105889419A (en) * | 2015-02-13 | 2016-08-24 | Ims齿轮有限公司 | Plastic Element for Lash-Free Support |
| US9932066B2 (en) | 2015-02-13 | 2018-04-03 | Ims Gear Se & Co. Kgaa | Plastic element for lash-free support |
| CN107768981A (en) * | 2016-08-17 | 2018-03-06 | 日本特殊陶业株式会社 | Spark plug |
| CN115768989A (en) * | 2020-07-06 | 2023-03-07 | 伊格尔工业股份有限公司 | Sliding member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005124255A (en) | 2005-05-12 |
| CN100356659C (en) | 2007-12-19 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180918 Address after: Aichi Patentee after: Denso Co., Ltd. Address before: Shizuoka Patentee before: Arsmo Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20200916 |