CN105003614B - Buncher - Google Patents

Abstract

The present invention provides a kind of buncher, it has input shaft, output shaft, driving force input unit, toggle and single direction rotation prevent mechanism, toggle has offset governor motion and connecting rod, driving force input unit has cam part, eccentric part and pinion shaft, pinion shaft is supported in input shaft via pinion bearing in the way of it can rotate, eccentric part has the reception hole that cam part is stored in the way of it can rotate the cam part of support pinion shaft, the internal tooth engaged with the external tooth of pinion shaft is formed with reception hole, cam part is adjacent in the axial direction in the way of the external tooth for clipping pinion shaft, be formed with the interface of cam part in order to formed house pinion shaft external tooth space and by the thinning part cut off, access is formed on thinning part, access has the 2nd opening portion on the outer wall for the 1st opening portion side opposite with the outer tooth for being formed at thinning part being formed on the inwall of the outer flank of thinning part.

Description

Buncher

Technical field

The present invention relates to the dirt discharge structure of the buncher of four section linkage types.

Background technology

For example, describing four following section linkage type variable speed in Japanese Unexamined Patent Publication 2013-36536 publications Device, it is by the reciprocating motion for being converted to connecting rod for the input shaft being connected with engine, by one-way clutch by connecting rod Move back and forth the rotary motion for being converted to output shaft.

In above-mentioned Japanese Unexamined Patent Publication 2013-36536 publications, the cam disc such as Fig. 7 institutes linked with the input shaft of engine Show, by utilizing the bolt axially through insertion to fasten and be assembled multiple disk components.In addition, by cam disc that On this interface tightened up, the cylindric recess of the external tooth 7a for housing pinion shaft 7 is formed with as shown in Figure 6B 51 and the part beyond the part needed for bolt fastening is removed in the way of expanding the volume of the recess 51 to realize lightweight Thinning part 152.The thinning part 152 turns into closing space when having housed the external tooth 7a of pinion shaft 7, thus can be by centrifugation Power makes lubricating oil disperse, and can also accumulate the dirt mixed with lubricating oil.If the dirt increase accumulated in thinning part 52, can be hampered Hinder the rotation of pinion shaft, harmful effect may be brought to gear shifting operation.

The content of the invention

The present invention in view of above-mentioned problem and complete, its object is to realize a kind of to subtract inflow cam part The structure of the dirt discharge of thin section.

In order to solve above-mentioned problem, reached purpose, the buncher 1 of the 1st form of the invention has：Input shaft 2, its quilt Driving force is inputted from traveling with driving source；Output shaft 3, it is abreast configured with the input shaft 2；Driving force input unit 4~7, It is by the rotation driving of input shaft 2；Toggle 20, it has the swing rod 18 linked with the output shaft 3, will be described The rotary motion of driving force input unit 4~7 is converted to the oscillating motion of the swing rod 18, when the driving force input unit 4~7 rotation When turning 1 circle, the swing rod 18 carries out 1 reciprocal oscillating motion；And single direction rotation prevents mechanism 17, it is in the swing rod 18 The swing rod 18 is fixed on the output shaft 3 when to be swung aside, is intended in the swing rod 18 to making institute during another side oscillation Swing rod 18 is stated to dally relative to the output shaft 3, wherein, the toggle 20 has：Offset governor motion 8~ 14, it makes the pivot P3 of the driving force input unit 4~7 eccentric relative to the pivot P1 of the input shaft 2；And Connecting rod 15, it links the driving force input unit 4~7 and the swing rod 18, and the driving force input unit 4~7 has：Cam part 5, it is prejudicially rotated integrally relative to the pivot P1 of the input shaft 2；Eccentric part 6, it is in the way of it can rotate It is supported in the cam part 5；And pinion shaft 7, it can be rotated against relative to the input shaft 2 so that be passed through The offset governor motion 8~14 can adjust offset R1, and the pinion shaft 7 is via pinion bearing 7b can revolve The mode turned is supported in the input shaft 2, and the eccentric part 6 has a reception hole 6a, and reception hole 6a is can make support institute State pinion shaft 7 the cam part 5 rotate mode store the cam part 5, be formed with the reception hole 6a with it is described Pinion shaft 7 external tooth 7a engagement internal tooth 6b, the cam part 5 in the way of clipping the external tooth 7a of the pinion shaft 7 It is adjacent on axial direction, recess 51 and the volume to expand the recess 51 is formed with the interface 5a of the cam part 5 Mode by the thinning part 52 cut off, the recess 51 forms the space of the external tooth 7a for housing the pinion shaft 7, Access 50 is formed with the thinning part 52, the access 50 has the inwall by external tooth 7a sides for being formed at the thinning part 52 The 1st opening portion 50a and the 2nd opening being formed on the outer wall 52b of the opposite side by external tooth 7a of the thinning part 52 on 52a Portion 50b.

In addition, the 2nd form of the present invention is that under above-mentioned 1st form, the 1st opening portion 50a is arranged at the inwall Position the rmax farthest upper pivot O from the input shaft 2 of 52a.

In addition, the present invention the 3rd form be under above-mentioned 1st or the 2nd form, the inwall 52a be formed as its with it is described The distance between the pivot O of input shaft 2 r gradually increases to the 1st opening portion 50a.

In addition, under the 4th form of the present invention is any one form in above-mentioned 1st to the 3rd form, in the small tooth Wheel shaft 7 is internally formed the 1st hollow oil circuit 61 extended along its center axis, with from the 1st oil circuit 61 radially Pinion shaft 7 described in insertion and the 2nd oil circuit 62 is formed with the pinion bearing 7b modes connected, from the 2nd oil circuit 62 lubricating oil for reaching the thinning part 52 are supplied to the 1st opening portion 50a.

According to the present invention, a kind of structure of the dirt discharge for the thinning part that can will flow into cam part can be achieved.

Specifically, according to the 1st form of the present invention, dirt accumulation can be prevented in the thinning part of cam part to speed change Bring harmful effect.

In addition, according to the 2nd form of the present invention, the dirt for the thinning part that cam part can will be flowed into by centrifugal force is guided To outlet.

In addition, according to the 3rd form of the present invention, the dirt for the thinning part that can will flow into cam part is swimmingly guided to going out Mouthful.

In addition, according to the 4th form of the present invention, supply of the lubricating oil to cam part can either be ensured, will can be flowed into again The dirt discharge of the thinning part of cam part.

Description according to a preferred embodiment of the present invention, other objects and advantages of the present invention are for art technology It will be apparent from for personnel.In the description, refer to the attached drawing shows the example of the present invention.However, so showing Example is not intended to exhaustive various embodiments of the present invention, therefore, should refer to claims following the description to determine this The scope of invention.

Brief description of the drawings

Fig. 1 is the sectional view of the structure for the buncher for representing present embodiment.

Fig. 2 is the figure from the offset governor motion, connecting rod and swing rod of end on observation Fig. 1 buncher.

Fig. 3 A-3D are the figures of the change of offset that are brought of offset governor motion for the buncher for representing Fig. 1.

Fig. 4 A-4C are change and the pendulum of swing rod for representing the offset that the offset governor motion of present embodiment is brought The figure of the relation of the swing angle scope of dynamic motion.

Fig. 5 A-5C are the figures of the dirt discharge structure of the cam disc for the toggle for representing present embodiment.

Fig. 6 A-6B are to represent present embodiment and the figure of the structure of the thinning part of conventional cam disc.

Fig. 7 is the exploded perspective view of the cam disc of existing toggle.

Label declaration

1：Buncher, 2：Input shaft, 3：Output shaft, 4：Offset governor motion, 5：Cam disc, 6：Eccentric disc, 6a： Reception hole, 6b：Internal tooth, 7：Pinion shaft, 7a：External tooth, 7b：Pinion bearing, 14：Offset regulation driving source, 14a：Rotation Rotating shaft, 15：Connecting rod, 15a：Big footpath annulus, 15b：Path annulus, 16：The connecting-rod bearing, 17：One-way clutch, 18：Swing rod, 20：Toggle, 50：Access, 51：Recess, 52：Thinning part, 61：1st oil circuit, 62：2nd oil circuit.

Embodiment

Hereinafter, the embodiment that present invention will be described in detail with reference to the accompanying.In addition, embodiments described below is to be used as this One of the realization rate of invention, the present invention can be applied to carry out to mode is implemented as follows in the range of its purport is not departed from Structure after modification or deformation.In addition, the buncher of the present invention can also be applied to other purposes beyond automobile, this is Self-evident.

The structure ＞ of ＜ bunchers first, referring to Figures 1 and 2, illustrates the knot of the buncher of present embodiment Structure.

The buncher 1 of present embodiment is can to make the gear ratio i (rotations of rotary speed/output shaft of i=input shafts Rotary speed) make the rotary speed of output shaft be the speed changer of " 0 ", i.e. so-called IVT (Infinity for infinitely great (∞) Variable Transmission：Limitless speed variator) one kind.

The buncher 1 of present embodiment has input shaft 2, output shaft 3 and 6 offset governor motions 4.

Input shaft 2 is made up of hollow part, and it receives the driving force from the travelling driving source such as engine or motor, It is driven in rotation centered on center of rotation axis P1.

Output shaft 3 is abreast configured at the position separated in the horizontal direction with input shaft 2 with input shaft 2, via differential Gear etc. transmits driving force to the axletree of automobile.

Offset governor motion 4 is driving force input unit respectively, be arranged to using the center of rotation axis P1 of input shaft 2 as Central rotation, with the cam disc 5 as cam part, the eccentric disc 6 as eccentric part and pinion shaft 7.

Cam disc 5 is disc-shape, to rotate integrally from the center of rotation axis P1 of input shaft 2 bias and with input shaft 2 Mode 21 group be arranged at input shaft 2.Each group cam disc 5 is each set to 60 ° of phase shifting, is configured to by 6 groups Cam disc 5 is in input shaft 2 circumferentially around one week.

Eccentric disc 6 is disc-shape, reception hole 6a is provided with heart P3 eccentric positions therefrom, to clip the reception hole 6a mode, 1 group of cam disc 5 is supported to rotate.

The reception hole 6a of eccentric disc 6 center is formed such that from the center of rotation axis P1 of input shaft 2 to cam disc 5 center P2 (reception hole 6a center) the center P2 apart from Ra and from cam disc 5 is to the center P3 of eccentric disc 6 apart from Rb It is identical.In addition, being formed with internal tooth 6b on the reception hole 6a of eccentric disc 6 inner peripheral surface clamped by 1 group of cam disc 5.

Pinion shaft 7 is concentrically arranged in the hollow bulb of input shaft 2 with input shaft 2, and via pinion bearing 7b The inner peripheral surface of input shaft 2 is supported in the way of it can rotate against.In addition, being provided with external tooth on the outer peripheral face of pinion shaft 7 7a.And then, differential attachment 8 is connected with pinion shaft 7.

Incision hole 2a is formed between 1 group of cam disc 5 on input shaft 2, incision hole 2a is in the bias with cam disc 5 The opposed position in direction connects inner peripheral surface with outer peripheral face, via incision hole 2a, the external tooth 7a and eccentric disc of pinion shaft 7 6 reception hole 6a internal tooth 6b engagements.

Differential attachment 8 is planetary gears, its have central gear 9, with input shaft 2 link the 1st gear ring 10, with it is small The 2nd gear ring 11 that gear shaft 7 links and by ladder little gear 12 by being capable of axle is supported in the way of rotation and revolution planet carrier 13, what the ladder little gear 12 was engaged by the large-diameter portion 12a that is engaged with the gear ring 10 of central gear 9 and the 1st and with the 2nd gear ring 11 Minor diameter part 12b is constituted.In addition, the central gear 9 of differential attachment 8 with by the driving of pinion shaft 7 motor drive mechanism into bias Regulation is measured with the rotary shaft 14a of driving source 14 to be linked.

Moreover, in the rotary speed and the rotary speed identical feelings of input shaft 2 that make the offset regulation driving source 14 Under condition, central gear 9 is rotated with the 1st gear ring 10 with identical speed, as central gear 9, the 1st gear ring 10, the 2nd gear ring 11 and row The lock-out state that this 4 key elements of carrier 13 can not be rotated against, with the 2nd gear ring 11 link pinion shaft 7 with input The same speed of axle 2 rotates.

In addition, make offset regulation driving source 14 rotary speed it is slower than the rotary speed of input shaft 2 in the case of, If setting the rotating speed of central gear 9 as gear ratio that Ns, the 1st gear ring 10 rotating speed are NR1, the gear ring 10 of central gear 9 and the 1st (number of teeth of the number of teeth/central gear 9 of the 1st gear ring 10) is j, then the rotating speed of planet carrier 13 is (jNR1+Ns)/(j+1).This Outside, if setting gear ratio ((number of teeth of the number of teeth/central gear 9 of the 2nd gear ring 11) × (rank of the gear ring 11 of central gear 9 and the 2nd The large-diameter portion 12a of the terraced little gear 12 number of teeth/minor diameter part 12b number of teeth)) be k, then the rotating speed of the 2nd gear ring 11 is { j (k+1) NR1+(k-j)Ns}/{k(j+1)}。

Therefore, make the rotary speed of offset regulation driving source 14 slower than the rotary speed of input shaft 2 and be fixed with In the case of the rotary speed of the input shaft 2 of cam disc 5 and the rotary speed identical of pinion shaft 7, eccentric disc 6 and cam disc 5 Rotate integrally.On the other hand, in the case where the rotary speed of input shaft 2 and the rotary speed of pinion shaft 7 have differences, partially Cartridge 6 is rotated centered on the center P2 of cam disc 5 in the periphery of cam disc 5.

As shown in Fig. 2 eccentric disc 6 is relative to cam disc 5, with from P1 to P2 apart from Ra with from P2 to P3 apart from Rb phases Same mode is eccentric.Therefore, it is possible to make the center P3 of eccentric disc 6 positioned at the center of rotation axis P1 identical lines with input shaft 2 On, it is " 0 " to make the distance between the center of rotation axis P1 of input shaft 2 and the center P3 of eccentric disc 6, i.e. offset R1.

Connecting rod 15 is supported by the way of it can rotate on the outer edge of eccentric disc 6.Connecting rod 15 has an end The big footpath annulus 15a in big footpath, has the path annulus 15b of path in another end.The big footpath annulus 15a of connecting rod 15 The outer edge of eccentric disc 6 is supported in via the connecting-rod bearing 16.

On output shaft 3, the one-way clutch 17 of mechanism is prevented to be linked with swing rod 18 via as single direction rotation.It is unidirectional from Swing rod 18 is fixed on output by clutch 17 in the case where being intended to rotate to side centered on the center of rotation axis P4 of output shaft 3 Axle 3, makes swing rod 18 be dallied relative to output shaft 3 in the case where being intended to rotate to opposite side.

Provided with end 18a is swung on swing rod 18, it is provided with swinging on the 18a of end so that path ring-type axially can be being clamped A pair of tab 18b that portion 15b mode is formed.The internal diameter pair with path annulus 15b is provided through on a pair of tab 18b The through hole 18c answered.Connecting pin 19 is inserted in through hole 18c and path annulus 15b, so that connecting rod 15 be connected with swing rod 18 Knot gets up.In addition, being provided with annulus 18d on swing rod 18.

Then, reference picture 2~Fig. 4 A-4C illustrate the song of the buncher of present embodiment to ＜ toggles ＞ Handle linkage.

As shown in Fig. 2 in the buncher 1 of present embodiment, offset governor motion 4, connecting rod 15 and swing rod 18 Constitute toggle 20 (four section linkages).

By toggle 20, by the rotary motion of input shaft 2 be converted to swing rod 18 with the rotation of output shaft 3 Oscillating motion centered on heart axis P4.The buncher 1 of present embodiment is as shown in figure 1, with total 6 crank connecting links Mechanism 20.

In toggle 20, in the offset R1 not in the case of " 0 " of offset governor motion 4, if made Input shaft 2 and pinion shaft 7 are rotated with identical speed, then each connecting rod 15 staggers 60 degree of phase respectively, and input shaft 2 with Alternately repeat to be pushed to the side of output shaft 3 between output shaft 3 or be pulled to the side of input shaft 2, swing swing rod 18.

Moreover, one-way clutch 17 is provided between swing rod 18 and output shaft 3, therefore in the case where pushing swing rod 18, Swing rod 18 is fixed and transmitted to output shaft 3 by the moment of torsion of the oscillating motion generation of swing rod 18 so that output shaft 3 rotates, and is leading In the case of drawing swing rod 18, swing rod 18 dallies without being transmitted to output shaft 3 by the moment of torsion of the oscillating motion generation of swing rod 18.6 Individual offset governor motion 4 be stagger respectively 60 degree phase and configure, therefore output shaft 3 is by 6 offset governor motions 4 Rotation driving in order.

In addition, in the buncher 1 of present embodiment, as shown in figs. 3 a-3d, offset governor motion can be passed through 4 regulation offset R1.

Fig. 3 A represent to make the state that offset R1 is " maximum ", and pinion shaft 7 and eccentric disc 6 are to cause the rotation of input shaft 2 Turn the central axis P1 and center P2 of the cam disc 5 and center P3 of eccentric disc 6 modes being arranged on straight line to be positioned.This When gear ratio i for minimum.Fig. 3 B represent to make offset R1 for less than Fig. 3 A " in " state, Fig. 3 C represent to make offset R1 For the state of " small " that is further less than Fig. 3 B.On gear ratio i, represent in figure 3b gear ratio i more than Fig. 3 A " in " State, in fig. 3 c represent more than Fig. 3 B gear ratio i " big " state.Fig. 3 D represent the shape for making offset R1 be " 0 " State, the center of rotation axis P1 of input shaft 2 is positioned with one heart with the center P3 of eccentric disc 6.Gear ratio i now is infinity (∞)。

Fig. 4 A-4C represent change and the swing rod 18 for the offset R1 that the offset governor motion 4 of present embodiment is brought Oscillating motion swing angle scope relation.

Fig. 4 A represent during " maximum " that offset R1 is Fig. 3 A the swing rod 18 of (when gear ratio i is minimum) relative to offset The hunting range θ 2 of the rotary motion (anglec of rotation θ 1) of governor motion 4, Fig. 4 B represent offset R1 for Fig. 3 B " in " when (become Speed than i for it is middle when) hunting range θ 2 of the swing rod 18 relative to the rotary motion (anglec of rotation θ 1) of offset governor motion 4, The swing rod 18 of when big (gear ratio i for) is relative to offset governor motion 4 when Fig. 4 C represent " small " that offset R1 is Fig. 3 C The hunting range θ 2 of rotary motion (anglec of rotation θ 1).Here, from the center of rotation axis P4 of output shaft 3 to connecting rod 15 with swinging End 18a point of contact, the length R2 that the distance for the center P5 for arriving connecting pin 19 is swing rod 18.

It can be seen from Fig. 4 A-4C, as offset R1 diminishes, the swing angle range Theta 2 of swing rod 18 also diminishes, in bias In the case that amount R1 is changed into " 0 ", swing rod 18 is no longer swung.

Then, reference picture 5A-5C and Fig. 6 A-6B illustrates this embodiment party to the dirt discharge structure ＞ of ＜ toggles The dirt discharge structure of the cam disc 5 of the toggle 20 of formula.

Fig. 5 A-5C are top view, stereogram and the sectional view of the cam disc 5 of toggle 20, and Fig. 6 A-6B are to compare The figure of the structure and the structure of the thinning part of existing cam disc of the thinning part of the cam disc of present embodiment is shown.

The buncher 1 of present embodiment in order to by flow into cam disc 5 thinning part 52 dirt discharge, be formed with from The inner circumferential side of thinning part 52 is communicated to the access 50 of outer circumferential side.

On the interface 5a of cam disc 5, as shown in figures 5a-5c, it is formed with external tooth 7a's for housing pinion shaft 7 Cylindric recess 51 and the part beyond the part needed for bolt fastening is removed in the way of expanding the volume of the recess 51 To realize light-weighted thinning part 52.

Access 50 is processed into the channel-shaped of section semicircular in shape, and tool on the interface 5a secured to one another of cam disc 5 There is the 1st opening portion 50a being formed on the inwall 52a by the external tooth 7a sides of pinion shaft 7 and be formed at the opposite of outer tooth 7a The 2nd opening portion 50b on the outer wall 52b of side.By it is as formed above be channel-shaped so that the processing of access 50 becomes easy.And And, access 50 is formed as, and when cam disc 5 is fastened each other, is formed as by the interface 5a of cam disc 5 relative to each other The rounded intercommunicating pore in section.In addition, cross sectional shape is not limited to circle.

Turn into closing space when thinning part 52 contains the external tooth 7a of pinion shaft 7 in recess 51, thus not only can be with By means of centrifugal force so that lubricating oil disperses, but also the dirt mixed with lubricating oil can be accumulated, and as in the embodiment described in, convex Access 50 is formed on the interface 5a of wheel disc 5, the outside thus, it is possible to which dirt to be discharged to thinning part 52.

In addition, the 1st opening portion 50a of access 50 is as shown in Figure 6A, it is arranged on the inwall 52a of thinning part 52 radially The position rmax farthest from the pivot O of input shaft 2.In addition, the inwall 52a's of thinning part 52 is shaped so as to, its with it is defeated Enter the distance between pivot O of axle 2 gradually increases from recess 51 to the 1st opening portion 50a, in other words, from the 1st opening portion 50a expands to recess 51 in eight shape.By being formed as this shape, so that as shown in Figure 6A, dirt is to the 1st opening portion 50a (arrow f) can prevent as shown in Figure 6B, there is the pivot O with input shaft 2 in the inwall 152a of thinning part 152 for flowing The distance between towards the 1st opening portion 50a reductions necking part 152c in the case of, dirt is to the 1st opening portion 50a opposite side (arrow f ') flows, and is stranded in necking part 152c.

In addition, as shown in Figure 5 C, in hollow the 1st that extends along its center axis of being internally formed of pinion shaft 7 Oil circuit 61.In addition, being also formed with from the 1st oil circuit 61 radially insertion pinion shaft 7 and the 2nd oil connected with pinion bearing 7b Road 62.Moreover, the 2nd oil circuit 62 is flowed into from the lubricating oil of oil pump (not shown) supply from the 1st oil circuit 61, arrival pinion shaft 7 External tooth 7a (recess 51 of cam disc 5) and thinning part 52 the 1st opening portion 50a.

In addition, as shown in Figure 5 B, the hole from reception hole 6a inner circumferential insertion to periphery can also be formed on eccentric disc 6 63, it will be discharged to the outside from the 2nd opening portion 50b of access 50 dirts come out from hole 63.By this structure, it can avoid The bearing dispersed from the 2nd opening portion 50b of access 50 dirts come out in the axle of cam disc 5 is supported in into reception hole 6a.

In addition, in the present embodiment, it is illustrated that lubricating oil is reached from the 1st oil circuit 61 via the 2nd oil circuit 62 The structure of the recess 51 of cam disc 5 and the oil circuit of thinning part 52, but the road of recess 51 and thinning part 52 is reached as lubricating oil , such as the gap between can also enumerating adjacent toggle 20, in addition also there are countless paths, need not go to live in the household of one's in-laws on getting married in footpath State.

As described above, according to present embodiment, the dirt that can will flow into the thinning part 52 of cam disc 5 is discharged.

The present invention is not limited to above-described embodiment, can within the spirit and scope of the present invention make a variety of changes and repair Change.Therefore, in order that public awareness the scope of the present invention, herein proposes claims below.

Claims (5)

1. a kind of buncher (1), it has：

Input shaft (2), it is inputted driving force from traveling with driving source；

Output shaft (3), it is abreast configured with the input shaft (2)；

Driving force input unit (4~7), it is by the input shaft (2) rotation driving；

Toggle (20), it has the swing rod (18) linked with the output shaft (3), by the driving force input unit (4 ~rotary motion 7) is converted to the oscillating motion of the swing rod (18), when the driving force input unit (4~7) rotation 1 is enclosed, The swing rod (18) carries out 1 reciprocal oscillating motion；And

Single direction rotation prevents mechanism (17), and the swing rod (18) is fixed on institute by it when the swing rod (18) is to be swung aside Output shaft (3) is stated, is intended in the swing rod (18) to making the swing rod (18) empty relative to the output shaft (3) during another side oscillation Turn, the buncher (1) is characterised by,

The toggle (20) has：Offset governor motion (8~14), it makes the driving force input unit (4~7) Pivot (P3) it is eccentric relative to the pivot (P1) of the input shaft (2)；And connecting rod (15), it links described drive Power input unit (4~7) and the swing rod (18),

The driving force input unit (4~7) has：Cam part (5), its pivot (P1) relative to the input shaft (2) Prejudicially rotate integrally；Eccentric part (6), it is supported in the cam part (5) in the way of it can rotate；And pinion shaft (7), it can be rotated against relative to the input shaft (2) so that pass through offset governor motion (8~14) energy Offset (R1) is enough adjusted,

The pinion shaft (7) is supported in the input shaft (2) via pinion bearing (7b) in the way of it can rotate,

The eccentric part (6) has reception hole (6a), and the reception hole (6a) is can make the institute of the support pinion shaft (7) The mode for stating cam part (5) rotation stores the cam part (5), is formed with the reception hole (6a) and the pinion shaft (7) internal tooth (6b) of external tooth (7a) engagement,

The cam part (5) to be adjacent in the axial direction in the way of the external tooth (7a) for clipping the pinion shaft (7),

Recess (51) is formed with the interface (5a) of the cam part (5) and with the side for the volume for expanding the recess (51) Formula is by the thinning part (52) cut off, and the recess (51) forms the sky of the external tooth (7a) for housing the pinion shaft (7) Between, be formed with access (50) on the thinning part (52), the access (50) have be formed at the thinning part (52) lean on this The 1st opening portion (50a) on the inwall (52a) of external tooth (7a) side and the phase by the external tooth (7a) for being formed at the thinning part (52) The 2nd opening portion (50b) on outer wall (52b) tossed about.

2. buncher according to claim 1, it is characterised in that

1st opening portion (50a) is arranged at farthest from the pivot (O) of the input shaft (2) on the inwall (52a) Position (rmax).

3. buncher according to claim 1 or 2, it is characterised in that

The inwall (52a) is formed as it, and (r) is opened to the described 1st the distance between with the pivot (O) of the input shaft (2) Oral area (50a) gradually increases.

4. buncher according to claim 1 or 2, it is characterised in that

In the 1st hollow oil circuit (61) that extends along its center axis of being internally formed of the pinion shaft (7),

Radially pinion shaft (7) described in insertion and to be connected from the 1st oil circuit (61) with the pinion bearing (7b) Mode is formed with the 2nd oil circuit (62),

The lubricating oil for reaching the thinning part (52) from the 2nd oil circuit (62) is supplied to the 1st opening portion (50a).

5. buncher according to claim 3, it is characterised in that

In the 1st hollow oil circuit (61) that extends along its center axis of being internally formed of the pinion shaft (7),

Radially pinion shaft (7) described in insertion and to be connected from the 1st oil circuit (61) with the pinion bearing (7b) Mode is formed with the 2nd oil circuit (62),

The lubricating oil for reaching the thinning part (52) from the 2nd oil circuit (62) is supplied to the 1st opening portion (50a).