CN1030830A

CN1030830A - Clock and watch

Info

Publication number: CN1030830A
Application number: CN88104516A
Authority: CN
Inventors: 池上敏正
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 1987-07-21
Filing date: 1988-07-20
Publication date: 1989-02-01
Also published as: KR930002498B1; GB2208018A; GB2208018B; GB8817226D0; CH679199B5; CH679199GA3; KR890002734A; CN1013229B; HK40794A

Abstract

A kind of clock and watch, by the 1st frame and on the 1st frame fixing the 2nd frame and the pinion wheel that is supporting between the two and formed by the wheel of gear parts.Wherein have at least an above-mentioned bearing portions of taking turns supporting of frame handlebar to connect, compress, locate, the plate spring component with other functions is perhaps arranged.The present invention is directed to the prior art frame and have the many shortcomings of different-thickness event part, in thin-plate member, make bearing function and elastic part integrated, thereby reduce the part number, reduce cost and improve the intensity and the precision of frame, product can once be washed into punch press.Thereby boost productivity greatly.

Description

Clock and watch

The present invention relates to the parts of bearings of relevant clock and watch and the structure of frame.

The elastic part parts of bearings train bearing of clock and watch always and the fastening usefulness of each part or location usefulness is formed dividually.For the frame cost is reduced, make frame with belt steel material, or on the plate that sheet member is made, be molded as frame again with synthetic resin.

, this technology always is at train bearing thick walled part, and the sheet section of flexible parts is constructed respectively, the number of part is just many, increases processing road number etc. again because of each processing content is different, just increases cost, part is several more than one again, and is also inconvenient at maintenance service this respect post sales.

On the other hand, the drag the when frame made from belt steel material is subjected to the external force of drop impact etc. is little, and processing is restricted, and between the frame processing time consuming of whole resin, produces the not enough problem of precision because of thermal deformation simultaneously again.

At this, the present invention is in order to solve such problem, as its purpose, in the hope of making bearing function and elastic part integrated in the thin-plate member, reach that the part number reduces and reduce the part cost, the intensity of the frame that the thin plate material makes is increased to some extent, improve machining precision simultaneously, and, shorten required process time, reduce cost.

Clock and watch of the present invention is characterized in that by the 1st frame and the 2nd frame of fixing on this 1st frame, and the above-mentioned the 1st and the 2nd pinion wheel that is supporting between the frame and form by the wheel of gear parts, wherein have at least a frame to have above-mentioned bearing portions of taking turns supporting is connected, compresses, located, the plate spring component of other functions is perhaps arranged.

In addition, clock and watch of the present invention is characterized in that by the 1st frame and the 2nd frame of fixing on the 1st frame, and the above-mentioned the 1st and the 2nd pinion wheel that is supporting between the frame and form by the wheel of gear parts, wherein have at least a frame to have above-mentioned bearing portions of taking turns supporting is connected, compresses, located, the plate spring component of other functions is perhaps arranged and a plurality of planar sections are arranged.

Clock and watch of the present invention are a kind of clock and watch of being made up of the clock and watch frame, it is characterized by in the clock and watch frame that sheet part is formed, a plurality of planar section composition that it is provided with the bead part of a plurality of plastic workings and is disposing on this bead part clip position in periphery at least.

Also have a kind of clock of the present invention by forming a plurality of frames of clock and watch body the inside, the rarest frame is the linking portion of box or inner casing location and the compositions of in box the clock and watch body being fixed such as leaf spring.

Also has a kind of clock spring of the present invention, it is characterized by it the 1st frame is arranged, and the pinion wheel that between the 2nd frame of fixing on the 1st frame and the above-mentioned the 1st and the 2nd frame, is supporting and form by the wheel of gear parts, wherein have at least 1 above-mentioned bearing portions of taking turns supporting of frame handlebar and partly thrust around this bearing portions, pull and stretch, the side gear shaft that is bent to form be to the determining positions part.

Description of drawings.

Fig. 1 is the planimetric map of one embodiment of the invention, and Fig. 2 to Fig. 5 is its sectional drawing, and Fig. 6 is the sectional drawing of other embodiment of train bearing part of the present invention.Fig. 7 (a) is the interior wheel back of the body tooth of day word and the skeleton view of a pinion wheel (b).Fig. 8 is the planimetric map of an embodiment of base plate of the present invention.Fig. 9 (a) (b) (c) is its sectional drawing.Figure 10 is the clock and watch planimetric map with base plate of the present invention.Figure 11-the 15th, the sectional drawing of clock and watch shown in Figure 10.

Among Fig. 1 to Fig. 5, the 1st, base plate, the 2nd, the train bearing of base plate 1 outside configuration.No. 2 wheels 3 are by the plunging 1a of base plate and go up the abacus bead of No. 4 overlapping wheels 4 of multilayer, can support rotationally.No. 4 wheels 4 are bearing on the plunging part 1a by train bearing tenon 2a and No. 2 wheels 3 again.4 and No. 2 wheels of No. 4 wheels, 3 axial play with above the base plate 1 and axle be that the part that bearing 2 half thrusts processing (stop in the purposes cutting off processing and carry out bead processing partly) is made, No. 4 wheels 4 be by with the pinion wheel part 4b of No. 3 gear 5a engagement, collar portion 4c, shaft portion 4d, the forging processing (also comprising situation about not heating) of concave portion 4e forms, the profile of tooth of gear 4a is with the wheel of cutting off processing (thrusting) manufacturing the 4f magnitude of interference to be fixed, and is integrated with it.No. 3 wheel 5 is processed into pinion wheel 5b and axle collar 5c by forging, following tenon 5d and go up the concave portion 5e of tenon, and the gear 5a of punching press profile of tooth forms, and following tenon 5d is the hole of base plate, and last tenon is with pull and stretch, plastic working or partly thrust the tenon 2b that is processed into and support.No. 3 wheels 5 will be provided with sweep 1c for preventing reversing during base plate 1 assembling.No. 5 wheel 6 structures are with No. 3 wheels, and in order to satisfy the condition of the outside diameter of gear/pinion wheel external diameter≤3, the profile of tooth of gear 6a also can be entirely with forging processing.Tenon 6d is bearing in that the train bearing partly thrusts in the hole of opening in the processing and is bearing in stator (on the shaft portion of ステ-) 7 as the recess 6c of tenon down on No. 5 wheels 6 again.The member length (L) of forging processing above must be more than 0.4 millimeter, and its number of teeth is less than 8, and material wishes it is aldary (particularly brass) or aluminium, and in order to reach slimming, the ratio T/L of collar portion thickness T and pinion wheel length L should be less than 1/2.4 and No. 5 wheels 6 of No. 4 wheels that train bearing 2 is provided with partly thrust processing, be significant for the contact drag that reduces regulation wheel adaptive (being axial play) part and the adaptive scalable of wheel of always carrying out with jewel etc.That bears No. 5 wheel 6 last tenons again partly thrusts the effect that fuel tank is also arranged.Rotor 8 is plastic, following tenon and above-mentioned the wheel equally, and on partly thrusting the base plate 1 of establishing mortise in the processing, last tenon is used in the tenon cave that chamfered portion is set in partly the thrusting of train bearing 2 and supports.Stator 7 allocates the position of face with the plunging part 1b that is contained in 2 places on the base plate, and multilayer is overlapping thereon for the coil unit that winding wire base plate of being handled with line and its termination by magnetic core 9 and coil 10 and insulcrete 11 are formed.Coil floor 10 is at the magnetic core 9 other templates that form, and the periphery of integrated circuit chip 12 has template hole in outstanding form of guide hole to the shelves (Au) of integrated circuit chip 12.Integrated 12 is monomers, packs into when installing in the hole of winding wire base plate 10, compresses with the integrated circuit chip holddown spring 2p of train bearing 2, makes between integrated circuit chip 12 and the template with this spring force and connects.Also stator 7 and magnetic core 9 magnetic can be combined by this spring force again.Snap-in force by holddown spring 2q is connected the termination on magnetic core 9 opposites and stator 7 again.13 is crystal unit, the position on the decision plane, hole that on base plate, forms, dress insulcrete 11 between the holddown spring 2c of the termination of sweep 1d and train bearing, crystal termination 13b, winding wire base plate 10(forms template in base plate one side), template and crystal termination 13b connect, and the spring force by termination holddown spring 2c obtains.Crystal unit 13 compresses by crystal holddown spring 2d again.The copper The thin plate 10a that battery 14 turns on negative electrode insulcrete 11 above the negative terminal head spring 1e, configuration is given prominence to by winding wire base plate outer shape, the spring force that cell cathode and copper The thin plate 10a connect by negative terminal head 1e reaches.Connecting with anode again is by carrying out at the incorporate positive termination 2d of train bearing.

Footstalk 15 is pressed 3 directions guiding of the in-plane of side and base plate 1 at base plate sweep 1f, 1g, processes or partly thrusts by pull and stretch, makes at jut to guide to the inside.This is because sweep 1f, 1g and footstalk bullport are very close, so pilot hole distortion during bending machining, aperture precision often is difficult to reach, and is purpose to eliminate its influence therefore.Footstalk 15 again, and stage part 15a and pinion wheel 15b are arranged, and stage part 15a contacts with the ratchet spring 1h that adorns on base plate.Ratchet spring 1h bends the end, and when making footstalk outside, by with instrument its front end being depressed, footstalk 15 is extracted in the disengagement that is connected of ratchet spring 1h and stage part 15a.When footstalk 15 is drawn, with the inclined-plane of stage part 15a, depress ratchet spring 1h, part 15a is connected with next stage, the position of decision footstalk 15.In this situation, pinion wheel 15b can transfer pin by the back of the body tooth engagement of interior wheel 16 of day word, in order positively to draw its footstalk, the part of ratchet spring 1h is carried out zero cut off (space after spring section and base plate rigid body portion are cut off is about 0), the power of footstalk 15 pushing directions is born by zero cut-off parts, the leading section of ratchet spring 1h is deflected to footstalk 15 pushing directions, the interior wheel 16 of day word by with the gear 16a of the pinion of No. 2 wheels, pinion wheel 16b, back of the body tooth 16c forms, and its processing adopts the thin plate material to cut off the complete job operation of processing with punch press.The pinion wheel part 16b that for example (tooth only is shown) shown in Fig. 7 (a) and (b) is getting the laggard line bend processing in distortion hole, and back of the body tooth 16c is shearing processing in the way on plane, carry out bending machining again and make.Gear 16a is with cutting off processing punching out profile of tooth.So output increases, cost reduces.The interior wheel 16 of day word is being supported the tooth root of pinion wheel 16b by base plate 1 mortise again, and axial play thrusts processing part 9a decision by magnetic core 9 half.Tube wheel 17 fits over the inboard of base plate 1, and the jut 1i that processes or partly thrust processing with pull and stretch keeps an axial play of wheel 17.

Next is the fixing means of outer dress part and mechanism, at the connecting portion of the set a plurality of shaft portion 1j(parts of base plate 1 with banded base plate raw material) cut off at box inner casing 20, planimetric position with its cut-off parts decision box and base plate 1, by being pressed on inner casing at more than 2 spring 2f that press that are provided with of train bearing, part by hornbook and box also connects, and mechanism and box are fixed.So the advantage of eliminating inner casing is arranged.

The structure of the height of base plate 1 and decision train bearing 2 below is described.At base plate bool 1K is set, with pull and stretch or partly thrust and be processed into outstanding protrusion 11, general at the bool front end because the tolerance errors of bending machining is big, so decision can not be used bending machining to the axial play of taking turns.But the height of adjusting protrusion 11 by bending height can be with its error concealment.Base plate 1 and train bearing 2 is fixing again, carries out the magnitude of interference by the convex portion 2k of the concave portion 1s of periphery sweep and train bearing and fixes, and the position of decision parallel direction is undertaken by the profile of periphery sweep and train bearing 2.

Above-mentioned thin plate 1 carries out bending or pull and stretch processing in order to prevent warpage and to improve rigidity in the periphery of removing shaft portion 1j.Relevant again do not have part that bending or pull and stretch add the Ministry of worker by pull and stretch in its vicinity or partly thrust and be processed into convex tendon 1m in periphery.Train bearing 2 also is to make convex tendon 2j at the periphery of mortise again, in the hope of improving rigidity, prevents warpage simultaneously.

Fig. 6 is the sectional drawing of other embodiment of train bearing.Divide explanation to be omitted with the above embodiments common part.The 101st, base plate, the 102nd, the train bearing, 103 is No. 2 wheels, and 104 is No. 4 wheels, and 105 is No. 3 wheels, and 106 is No. 5 wheels, the 107th, rotor.No. 3 wheel 105 cuts off at the guide hole periphery, and bending machining (cutting off laggard line bend processing zero) manufactures pinion wheel 105a, carries out the profile of tooth punching in its neighboring with punch press and makes gear 105b.The burr direction of pinion wheel 105a is the neighboring.Following tenon carries out from base plate 102 that pull and stretch processing partly thrusts with shaft portion 101a or plastic working becomes outshot, the round edge of pinion wheel 105a is being supported, is going up tenon carrying out and a 102a upper support of base plate 101 the same processing in train bearing 102.No. 4 wheels 104 be with the pinion wheel 104a of No. 3 wheel 105 same processing and gear 104b on make the 104c interference fixedly make integral body.The burr of pinion wheel 104a makes the engagement of No. 3 gear 105b impregnable on the next door, center.The processing of No. 5 wheels 106 is identical with No. 3 wheels 105, so explanation is omitted.Rotor 107 usefulness pinion wheel 107a and magnetite fixed part 107b(are many) constitute, with magnetite 107c be one.The following tenon of rotor 107 is bearing on the tenon 101b of magnetite hole and base plate again, and last tenon is then at the tenon 120b of train bearing upper support.Again on making each number of small pinions with below 8 for well, the thickness of material is to be processed as with punch press below 0.2 millimeter again.

Fig. 8 is other embodiments of the invention base plate plane figure, and Fig. 9 is its sectional drawing, and Figure 10-Figure 15 is for adopting the clock and watch planimetric map and the sectional drawing of base plate of the present invention.As Fig. 8, shown in Figure 9, the part of forming in 1 progressive spacing has: at the guide hole 202 of the processing usefulness of the progressive driving section of carrying material 201 branch installing, part base plate 203, the progressive running part of base plate 203 and the bridge 205 that two progressive running parts are connected, 6 shaft portion 204 that driving section and base plate 203 and bridge 205 are connected with base plate 203.As shown in Figure 8, represent with notional line that according to the place of incision that the optional position at 6 linkage components 204 is cut off base plate 203 is the shapes that are near completion.On base plate 203, except that the flat of a shaft portion 204 and a part, be provided with the bead part 203a of periphery bending or pull and stretch processing, inboard at bead part 203a, be provided with

spring section

203b, 203c, 203r, pull and

stretch part

203d, 203e in cutting off processing way, stop and forming partly thrust part 203f, 203g, plunging part 203h, 203i, 203j, sweep 203k, 203l, with cutting off the hole 203m that processing is made, 203n, 203p, 203q, 203u, the convex tendon 203s that pull and stretch processing (also can partly thrust) is made, 203t, 203v is with forging (the representative part of each processing are referred in above explanation) such as tenon 203w that is processed to form.So,, take about 0.5 second so be processed into 1 base plate because all processing can be processed on punch press.Intensity aspect again, owing in periphery bead part 203a is set, base plate is made into ability and is pressed into pin (particularly hour hands be pressed into power big) and extracts external force such as pin, drop impact.Also have, near the of planar section beyond the bead part 203a processed by convex tendon part 203s(pull and stretch), 203t(partly thrusts processing) and pull and stretch part 203d, partly thrust part 203f etc. in the hope of improving intensity, shaft portion 204 is on the same plane of reference field (plane of area maximum) with base plate 203, so can obtain enough machining precisioies.Load onto this bead part 203a and convex tendon part 203s, 203t, also can prevent deflection.Carry out above processing, the thickness of slab of band 201 should be used materials such as aldary, particularly brass, phosphor bronze, beryllium copper, Sn Bs below 0.3 millimeter.Again, though explain with band, even short material all is the same with sheet material (plate).

Among Figure 10-Figure 15, relevant clock and watch structure with above-mentioned base plate is described.203 are the base plate, 206 that illustrates with Fig. 8 Fig. 9, train bearing and the circuit pressure strip that 207 usefulness punch presses are processed into, the 208th, battery, the 209th, stator, 201 is magnetic core, the line of using by magnetic core 210 and coil former, coil, the winding wire base plate 211 that coil is dealt with the termination of line, insulcrete 212 grades constitute coil unit, rotor 213.214,215,216,217,218,219 respectively is that No. 5 wheels, No. 4 wheels, No. 3 wheels, No. 2 wheels, the interior wheel of day word, tube wheel, No. 4 wheels 215 keep second hands, No. 2 wheel 217 keeps minute hand, tube wheel 219 keeps hour hands, the 220th, the MOS-IC sheet, the 221st, crystal unit, can be fixed on the winding wire plate 211 to conducting, the 222nd, footstalk, at the pinion wheel part 222a of the state of pulling out lattice with the crown wheel 218a engagement of the interior wheel of day word, base plate spring 203b, concerted action, the 222b of ditch portion that has multistage to locate.Stator 209 is made the planimetric position according to the parts of bearings 203i of base plate, the external diameter of 203j, and coil unit is the multilayer overlay configuration on stator 209.Also have and to place MOS-IC sheet 220 on the coil floor 211, compress with holddown spring (4) 207a of circuit pressure strip 207.This snap-in force connects the electrical equipment between template on shelves 220a and the winding wire base plate 211 of MOS-IC sheet 220, the magnetic core 210 magnetic combinations of stator 209 and coil unit simultaneously.About the magnetic of the opposing party's stator 207 and magnetic core 210 in conjunction with being that holddown spring 207b with the circuit pressure strip compresses.

213 times tenons of rotor are bearing in the following hole 203n of base plate 203, last tenon is bearing in the last hole of train bearing 206, No. 5 following tenons of wheel 214 handles are bearing in the tenon 209a of stator, last tenon is bearing in the last hole of train bearing 206, No. 2 wheel 217 is bearing in the hole of plunging part 203h and takes turns 215 core supporting stacked No. 4 by the top multilayer of No. 2 wheels 217, tenon is bearing in the last hole of train bearing 206 on No. 4 wheels 215, and following tenon is taken turns 217 by No. 2 and is bearing on the plunging part 203h.On No. 3 wheels 216 tenon be bearing on the train bearing 206 tenon (use the punch press press process) that is provided with and down tenon support by the hole 203m of base plate.The interior wheel 218 of day word is bearing on the hole of base plate 203, determines axial play with the part of train bearing 206 and magnetic core 210.Crystal unit 221 usefulness are contained in bottom plate hole 203u(, and some partly thrusts processing) the limit guide, compress with circuit pressure strip 207.

Train bearing 206 is used base plate tenon 203w(referring to Figure 12) location, with circuit pressure strip 207 outshot 206a, 206b, 206c, 206d are compressed, be fixed on the base plate 203.Battery 208 usefulness are crimped on the VSS electrode of the bracketed part 211a(of winding wire base plate 211 with the logical MOS-IC sheet 220 of a termination) on, 203C bears upward pressure with spring, prevents short circuit by insulcrete 212 between bracketed part 211a and spring 203c.Be used in the anode that the positive termination 207c that forms one on the circuit pressing plate 207 compresses battery 208 again, make anodal the connection.

Circuit pressing plate 207 also has pressing spring 207d(3 bar in inner casing 223 connections except above-mentioned holddown spring 207a, 207b, positive termination 207c), shaft portion 204 co-operation of base plate 203 are at base plate 3 with for the support 207e that fixes other parts.These holder part 207e is configured in the periphery of mechanism, with crystal pressing section, holddown spring 207a, 207b, because of circuit pressure strip 207 middle bodies float, so hook part 2031(2 place is set), be hooked among the recess 207f of circuit pressure strip and prevent to float, hook part 20 31 is leaf springs, and deflection becomes during installation.

Footstalk 222 is bearing in bead part 203a, and in the hole of sweep 203k, spring 203b packs on ditch part 222b.Spring 203b normal pressure has original amount of deflection on footstalk 222.So pulling out lattice when making the rotating state of pin, by the inclined-plane of ditch part 222b spring 203b is depressed in that hornbook is other, enter footstalk pinion wheel part 222a lateral sulcus 222b and be revolution needle-like attitude.This moment, pinion wheel part 222a and crown wheel 218a can be meshing with each other with the revolution pin.

Pull and stretch part (3 place) 203V that is arranged on the base plate 203 is a kind of projection, the axial play that the tube wheel 219 that it can guarantee to be configured in base plate 203 inboards and hornbook 224 are suitable, and tube wheel 219 is bearing in the periphery of plunging 203h.

Below explanation is with the relation of outer dress part.Base plate shaft portion 204 double as machinery let-down face as shown in Figure 1, is connected with the part of inner casing 225, and in-plane cuts off end face (shown in the notional line of Fig. 8) with shaft portion 204 and locatees in inner casing 225.

More than explanation is with regard to base plate, but also can be used for making the clock and watch shell that clock and watch are used by train bearing and circuit pressure strip and so on by thin material.Connecting rod is processed also no problem if any the words more than two again.

As mentioned above, according to the present invention, process base plate with light sheet material, rim, for the bending that improves rigidity, convex tendon, pull and stretch etc. by this can be integrated with elastic part, so reach the minimizing number of parts, increase output is received in punch press processing (forging, bending, pull and stretch, shearing), texts reduces cost because carry out simultaneously.

Again according to the present invention, the clock and watch frame that consists of by thin plate is processed to form further formation convex tendon of bead part in outer peripheral portion bending or pull and stretch, obtain the intensity of good external force resistance, simultaneously because all processing adopt cut off, the plastic working (punch process) of bending, pull and stretch, forging (also comprise and not heating) processing etc., be expected to shorten process time, reduce cost, increase simultaneously output. Again because of the datum level on shaft portion and grading running part and clock and watch chassis roughly at grade, have the machining accuracy advantages of higher.

Claims

1, a kind of clock and watch, it is characterized by it by the 1st frame, with the 2nd frame of on the 1st frame, fixing, and the above-mentioned the 1st and the 2nd pinion wheel that is supporting between the frame and form by the wheel of gear parts, wherein have at least an above-mentioned bearing portions of taking turns supporting of frame handlebar to connect, compress, locate, the plate spring component with other functions is perhaps arranged.

2,, it is characterized by leaf spring part or the clock and watch body of forming clock and watch are fixed as the clock and watch in the claim 1.

3, as the clock and watch in the claim 1, it is characterized by leaf spring the part of forming clock and watch and these parts of working together in a plurality of location positioning.

4,, it is characterized by leaf spring and electrical equipment is connected by directly or indirectly compressing as the clock and watch in the claim 1.

5, a kind of clock and watch, it is characterized by it forms, wherein has at least an above-mentioned bearing portions of taking turns supporting of frame handlebar to connect, compress, locate by the 1st frame and the pinion wheel that is supporting between the 2nd frame of fixing on the 1st frame and the above-mentioned the 1st and the 2nd frame with by the wheel of gear parts, plate spring component with other functions is perhaps arranged, and the part on a plurality of planes is arranged.

6, a kind of clock and watch of being made up of the clock and watch frame is characterized by in the clock and watch frame that sheet part forms, and the bead that is shaped by a plurality of plastic workings that are arranged on periphery partly reaches a plurality of planar sections that dispose and forms on this bead part clip position at least.

7,, it is characterized by a plurality of planar sections and form by the shaft portion more than at least two as the clock and watch in claim 1 or 6.

8,, it is characterized by the fixed part that a plurality of planar section double as are formed the clock and watch part as the clock and watch in claim 5 or 6.

9,, it is characterized by the coupling part that a plurality of shaft portion have box-like or interior shelly as the clock and watch in claim 1 or 6.

10,, it is characterized by at the next door of a plurality of planar sections formation convex tendon part, pull and stretch and partly, partly thrust part etc. as the clock and watch in claim 5 or 6.

11, as the clock and watch in claim 1 or 6, the middle body that it is characterized by at clock and watch forms a minimum fixed part.

12, a kind of clock is by forming a plurality of frames of clock and watch body the inside, and the rarest frame is formed the fixing leaf spring of clock and watch body the linking portion of box or inner casing location with in box.

13, as the clock and watch in the claim 12, it is characterized by the frame that makes the fixing plate spring portion of clock and watch, be configured in position near inner casing.

14,, it is characterized by box or the inner casing linking portion is formed with connecting rod as the clock and watch in the claim 12.

15, a kind of clock and watch, it is characterized by it forms by the 1st frame and the pinion wheel that is supporting between the 2nd frame of fixing on the 1st frame and the above-mentioned the 1st and the 2nd frame with by the wheel of gear parts, wherein has a frame at least above-mentioned bearing portions of taking turns supporting, simultaneously, the periphery of this bearing portions by partly thrust, pull and stretch, be bent to form side gear shaft to the determining positions part.