CN104675969B - Speed reducer - Google Patents

Abstract

The invention provides a speed reducer which reduces the probability of leak of a lubricant in the speed reducer from the inside of an input shaft to a motor side. The speed reducer (10) comprises an input shaft (12). The input shaft (12) is provided with a motor shaft insertion hole (12B) at the motor side end (12A) and provided with a pinion (18) engaged with a distribution gear (16) at the end (12D) of the side opposite the motor. The speed reducer (10) comprises a bolt insertion hole (12G) penetrating from the end face (12F) of the input shaft toward the motor shaft insertion hole; the bolt insertion hole comprises a large-diameter portion (12G1) for holding the head (80A) of a connecting bolt (80) and a small-diameter portion (12G2) used for insertion of the shaft (80B) of the connecting bolt. The chamfering amount (Hch1) of a first chamfer portion (CH1) of the large-diameter portion is greater than the chamfering amount (Hch2) of a second chamfer portion (CH2) of the small-diameter portion. A sealing gasket (90) is arranged between the head of the connecting bolt and the bottom surface (12G1a) of the large-diameter portion.

Description

Deceleration device

The application is advocated based on the preferential of Japanese patent application filed in 27 days November in 2013 the 2013-245485th Power.All the elements of the Japanese publication are by reference to being applied in this specification.

Technical field

The present invention relates to a kind of deceleration device.

Background technology

For example in patent documentation 1, a kind of as shown in Figure 5 deceleration device for linking with motor and using is disclosed.Should The input shaft 913 of deceleration device 911 at one end portion 915 end face 915A have insertion motor drive shaft 917 motor shaft insertion hole 919.Also, the periphery 921B in the other end 921 is provided with the little gear 925 engaged with the gear 923 of deceleration device 911. And, the bolt of the binder bolt 927 that the end face 921A in the other end 921 has insertion for linking with motor drive shaft 917 is inserted Enter hole 929.

Also, as shown in dash-dot lines in fig. 5, by making to be inserted in the binder bolt 927 of bolt-inserting hole 929 and motor drive shaft The end face 917A of 917 deceleration device side is screwed togather, and input shaft 913 is linked with motor drive shaft 917.

Patent documentation 1：Japanese Unexamined Patent Publication 2012-57672 publications (Fig. 2)

However, in the deceleration device 911 of the input shaft 913 with said structure, there are the following problems：For to input The lubricant in deceleration device 911 that little gear 925 with motor opposite side of axle 913 etc. is lubricated is possible to via spiral shell Bolt patchhole 929 enters into the inside of input shaft 913, and leaks into motor-side.

The content of the invention

The present invention is completed to solve the problems, such as this conventional, and its problem is to provide one kind to reduce slowing down Lubricant in device via input shaft internal leakage to the probability of motor-side deceleration device.

The present invention solves above-mentioned problem by being set to following structure：A kind of deceleration device, which has input shaft, described defeated Portion has the motor shaft insertion hole inserted for motor drive shaft at one end to enter axle, and the other end is provided with the gear with deceleration device The little gear of engagement, the deceleration device is with slotting towards the motor drive shaft from the end face of described the other end of the input shaft Enter hole and run through and be inserted with the bolt-inserting hole for the bolt linked with motor drive shaft, the bolt-inserting hole has for the bolt Header arrangement large-diameter portion and the minor diameter part that is inserted through of axle portion for the bolt, in the large-diameter portion and motor opposite side Inner peripheral be formed with the 1st chamfered section, 2nd chamfered section is formed with the inner peripheral of motor opposite side in the minor diameter part, Chamfer amount of the chamfer amount of the 1st chamfered section more than the 2nd chamfered section, in head and the large-diameter portion of the bolt Seal washer is configured between bottom surface.

In the present invention, the bolt-inserting hole run through towards motor shaft insertion hole from the end face of input shaft has the head for bolt The minor diameter part that the large-diameter portion of portion's configuration and the axle portion for bolt are inserted through.The with the inner peripheral of motor opposite side the 1st of large-diameter portion Chamfer amount of the chamfer amount of chamfered section more than the 2nd chamfered section with the inner peripheral of motor opposite side of minor diameter part.Also, in spiral shell Seal washer is configured between the bottom surface of the head and large-diameter portion of bolt.

Thereby, it is possible to reduce the probability that lubricant is leaked from the bolt-inserting hole of input shaft.

In accordance with the invention it is possible to reduce lubricant in deceleration device via the internal leakage of input shaft to motor-side can Can property.

Description of the drawings

Fig. 1 be represent one of embodiments of the present invention involved by deceleration device structure entirety sectional view.

Fig. 2 is the amplification view near the input shaft of Fig. 1.

Fig. 3 is the side view when deceleration device of Fig. 1 is observed from motor-side.

Fig. 4 be by the input shaft of above-mentioned deceleration device take out it is representing, including the sectional view of enlarged partial cross-sectional.

Fig. 5 is the entirety sectional view of that represents conventional deceleration device.

In figure：10- deceleration devices, 12- input shafts, 12A- motor-sides end (one end), 12B- motor shaft insertion holes, The end (the other end) of 12C- bottom surfaces, 12D- and motor opposite side, 12F- end faces, 12G- bolt-inserting holes, the big footpaths of 12G1- Portion, 12G2- minor diameter parts, 14- motor drive shafts, 16- distribution gears, 18- little gears, 22- bent axles, 62,64- oil sealings, 80- links spiral shell Bolt.

Specific embodiment

Hereinafter, with reference to the accompanying drawings one of embodiments of the present invention is described in detail.

Fig. 1 be represent one of embodiments of the present invention involved by deceleration device structure entirety sectional view.And And, Fig. 2 is the amplification view near the input shaft of Fig. 1, and Fig. 3 is the side view when deceleration device of Fig. 1 is observed from motor-side.

The deceleration device 10 has the reducing gear 11 of the eccentric oscillating-type for being referred to as distribution type, and not shown for driving Mechanical hand joint.

In deceleration device 10 involved by the embodiment, the input of the power of motor 13 by so-called connection shaft type Axle 12 and be transfused to.With regard to the structure of the periphery of input shaft 12, will be described in detail afterwards.

Input shaft 12 is provided with the little gear with multiple (being 3 in the example, only illustrate 1) engagements of distribution gear 16 18.That is, little gear 18 is engaged simultaneously with 3 distribution gears 16 of deceleration device 10.Each distribution gear 16 is connected with bent axle 22 respectively Knot.

Bent axle 22 is provided with 3 (referring to Fig. 3) in this embodiment, and inclined in the axle center O1 from internal gear described later 24 Move on the circumference of R1, be respectively configured with 120 degree of interval.

On each bent axle 22, be respectively formed with the 1st eccentric body 26 in axial same position, and with the 1st eccentric body 26 It is adjacent that the 2nd eccentric body 28 is respectively formed with axial same position.1st eccentric body 26 of each bent axle 22 is each other and the 2nd Eccentric phase between eccentric body 28 is consistent.1st eccentric body 26 and the 2nd eccentric body 28 eccentric phase difference for 180 degree (to Direction away from each other is eccentric).

In the periphery of the 1st eccentric body 26 of each bent axle 22, is assembled with by the 1st eccentric body bearing 30 being made up of roller 1 external gear 32.In the periphery of the 2nd eccentric body 28 of each bent axle 22, assembled by the 2nd eccentric body bearing 34 being also made up of roller There is the 2nd external gear 36.

Thus, the 1st eccentric body 26 on 3 bent axles 22 can synchronous rotary and swing the 1st external gear 32, similarly, 3 The 2nd eccentric body 28 on root bent axle 22 can synchronous rotary and swing the 2nd external gear 36.1st external gear 32 and the 2nd external gear 36 eccentric phase poor (eccentric phase based on the 1st eccentric body 26 and the 2nd eccentric body 28 is poor) is 180 degree.

The 1st wheel carrier 40, the 2nd wheel carrier 42, each bent axle 22 are configured with the axial both sides of the 1st external gear 32, the 2nd external gear 36 The 1st wheel carrier 40, the 2nd wheel carrier 42 are supported on by a pair of taper roll bearings 44,46.1st wheel carrier 40, the 2nd wheel carrier 42 pass through A pair of taper roll bearings 48,50 are supported on shell 52.In addition, the 1st wheel carrier 40, the 2nd wheel carrier 42 are by being pressed in the 1st wheel carrier 40 And through the 1st external gear 32, the wheel carrier pin 54 of the 2nd external gear 36, and by wheel carrier bolt 56, it is concatenated and integration.

1st external gear 32, the 2nd external gear 36 and 24 internal messing of internal gear.In this embodiment, internal gear 24 by with it is outer The internal tooth wheel body 24A of 52 integration of shell and rotatably it is assembled in the internal tooth wheel body 24A and constitutes the internal gear 24 The export trade 24B of internal tooth is constituted.The number of teeth (radical of export trade 24B) of internal gear 24 is than the 1st external gear 32, the tooth of the 2nd external gear 36 Number somewhat more (only many 1 in the example).

In present embodiment, the 1st arm of mechanical hand is linked with by bolt (only illustrating bolt hole 52A) on shell 52 (omit diagram), on the 1st wheel carrier 40 by bolt (only illustrating screw 40A) be linked with mechanical hand the 2nd arm (object machinery, Omit diagram).

The reducing gear 11 of the deceleration device 10 is (as grease in the example, but can also use grease by lubricant Or any one in lubricating oil is being lubricated) state that is lubricated to be operating.In order to the inside to deceleration device 10 is carried out Sealing, is configured with oil sealing 62 between input shaft 12 and electro-motor adapter 60, and the 1st wheel carrier 40 and the 2nd wheel carrier 52 it Between be configured with oil sealing 64.

Also, in this embodiment, linking the axial end 40B of the 1st wheel carrier 40 and the 2nd arm (object of mechanical hand Machinery) when, entered by liquid liner (omitting diagram) etc. is coated between the axial end 40B and the 2nd arm of the 1st wheel carrier 40 Row sealing.Also, for the linking part between shell 52 and the 1st arm also by liquid liner etc. sealing.In addition, symbol 66 to cover the closure of the crankshaft hole 40F of the 1st wheel carrier 40, and symbol 68 is the closure for covering input shaft bore 40G.

Also, including the little gear 18 of input shaft 12 deceleration device 10 inner space P1 relative to including motor 13 The space outerpace P2 of internal deceleration device 10, is sealed by following structure.

Fig. 4 be by the input shaft 12 of above-mentioned deceleration device 10 take out expression, including the sectional view of enlarged partial cross-sectional.With Under, Primary Reference Fig. 2 and Fig. 4 is carried out to the structure of the periphery of the input shaft 12 of the deceleration device 10 involved by present embodiment in detail Describe in detail bright.

As described above, in deceleration device 10 involved by the embodiment, the power of motor 13 quilt by input shaft 12 Input.

The diameter of 13 side of motor of input shaft 12 is thicker, more prominent more towards axially external (motor-side) than the 2nd wheel carrier 42. Input shaft 12 at one end portion be motor-side end 12A radial direction central authorities have insertion motor 13 motor drive shaft 14 motor drive shaft insertion Hole 12B.

Motor drive shaft 14 is inserted in the motor shaft insertion hole 12B of input shaft 12, until abutting with bottom surface 12C, and passes through key 76 are integrated in a circumferential direction with input shaft 12.It is formed with for link spiral shell described later in the axial end 14A of motor drive shaft 14 The screw 14B that bolt 80 is screwed togather.

Input shaft 12 it is thinner than the diameter of motor-side with the diameter of motor opposite side, and be configured at deceleration device 10 The radial direction central authorities of reducing gear 11.

As it was previously stated, be provided with the end 12D of motor opposite side in the other end of input shaft 12 distributing with 3 The little gear 18 of the engagement simultaneously of gear 16.That is, the embodiment is equivalent to following configuration example：Deceleration device 10 is with multiple songs The deceleration device of the eccentric oscillating-type of axle 22,18 meshed gears of little gear with input shaft 12 are to be arranged at dividing for the bent axle 22 Selective gear 16.

End face (end face of the other end) 12F of the end 12D with motor opposite side of input shaft 12 be provided with from The bolt-inserting hole 12G that end face 12F runs through towards the motor shaft insertion hole 12B of insertion motor drive shaft 14.In bolt-inserting hole 12G It is middle to insert for linking the binder bolt 80 of input shaft 12 and motor drive shaft 14.Bolt-inserting hole 12G has for the link spiral shell The minor diameter part 12G2 that the large-diameter portion 12G1 of the head 80A configurations of bolt 80 and axle portion 80B for the binder bolt 80 are inserted through.In addition, In binder bolt 80 involved by present embodiment, only threaded portion 80C is formed with the front of axle portion 80B, but according to link The species of bolt, also can be formed with threaded portion 80C throughout whole axle portion 80B.The formation length of the threaded portion 80C of binder bolt without Be particularly limited to (alternatively can be formed directly with threaded portion from head only the binder bolt of threaded portion to be formed with front Binder bolt).

With reference to Fig. 4,1st chamfered section is formed with the inner peripheral of motor opposite side in the large-diameter portion 12G1 of input shaft 12 CH1.Also, 2nd chamfered section CH2 is formed with the inner peripheral of motor opposite side in minor diameter part 12G2.

In this embodiment, the 1st chamfered section CH1 is formed as：With on axial cross section (section of Fig. 2, Fig. 4) with Plane CH1c cutting large-diameter portion with 30 degree of formation angle between axle center (axle center of=internal gear 24) O1 of input shaft 12 12G1's is formed with the inner peripheral of motor opposite side.The formation radially of the 1st chamfered section CH1 is highly Hch1.

On the other hand, in this embodiment, the 2nd chamfered section CH2 is formed as：With on axial cross section with input shaft Between 12 axle center O1 plane CH2c with 45 degree of formation angle cut minor diameter part 12G2 with motor opposite side in Periphery and form (so-called C chamfereds).The formation radially of the 2nd chamfered section CH2 is highly Hch2.In addition, the 1st chamfering Portion CH1, the formation angle of the 2nd chamfered section CH2 are not limited to 30 degree and 45 degree, as long as the angle relative to axle center O1 to specify Incline.

In the embodiment, formation height Hch1, Hch2 radially is defined as into chamfer amount.According to this definition, big Chamfer amount (the formation height radially of the 1st chamfered section CH1 formed with the inner peripheral of motor opposite side of footpath portion 12G1 Hch1) chamfer amount of the 2nd chamfered section CH2 formed than the inner peripheral in minor diameter part 12G2 and motor opposite side is (radially Formation height Hch2) it is bigger (Hch1 ＞ Hch2).

Specifically, in the embodiment, about 3 times (Hch1 ≈ 3Hch2) are designed to.For qualitative, as long as the 1st chamfering Chamfer amount of the chamfer amount of portion CH1 more than the 2nd chamfered section CH2, but more preferably guarantee that following size is poor：" the 1st chamfered section Chamfer amount (formation height Hch2 radially) of the chamfer amount (formation height Hch1 radially) of CH1 than the 2nd chamfered section CH2 It is big more than 2.0 times " (Hch1 >=2.0Hch2).

By the way, the inner peripheral in the motor-side of large-diameter portion 12G1 is formed with the 3rd chamfered section CH3.3rd chamfered section CH3 is formed as：With circular arc C H3r that the inner circumferential and bottom surface 12G1a with large-diameter portion 12G1 on axial cross section connects just Cut and formed (so-called R chamfereds).The formation radially of the 3rd chamfered section CH3 is highly Hch3.

Also, the 4th chamfered section CH4 is formed with the inner peripheral of motor shaft insertion hole 12B.In the embodiment, the 4th falls The axial cross section in corner is along relative to planes CH4c of the axle center O1 with 30 degree of formation angle ' expand until radial dimension reaches Radial dimension Hch4c ', further along plane CH4c with 60 degree of formation angle " is expanded until radial dimension reaches radially Size Hch4c ", thus, the formation height for implementing radially adds up to the machining of Hch4.That is, in the embodiment, Hch4 ＞ Hch1 ＞ Hch3 ＞ Hch2.That is, in chamfer amount (formation height radially), the inner peripheral of motor shaft insertion hole 12B The 4th chamfered section CH4 it is maximum, then successively with the 1st chamfered section with the inner peripheral of motor opposite side of large-diameter portion 12G1 CH1, the order of the 3rd chamfered section CH3 of the inner peripheral of the motor-side of large-diameter portion 12G1 reduce, and minor diameter part 12G2's is contrary with motor 2nd chamfered section CH2 of the inner peripheral of side is minimum.

Also, seal washer is configured between the bottom surface 12G1a of the head 80A and large-diameter portion 12G1 of binder bolt 80 90.Seal washer 90 is to be assembled with the elastomer with sealing function in the local of contact surface or throughout the complete cycle of whole bearing-surface Packing ring.That is, seal washer 90 in the way of blocking the 2nd chamfered section CH2 to the gap between binder bolt 80 and input shaft 12 Sealed.

Axial length L 12G1 of large-diameter portion 12G1 is set as the bottom surface 12G1a of large-diameter portion 12G1 positioned at than the little tooth Positions of the position L18 (Fig. 2) that wheel 18 is engaged with distribution gear 16 more by axial motor side.In present embodiment, further set Be set to axial motor side δ L18 are more depended on positioned at position (end) P18 for axially most leaning on motor-side of facewidth W18 than little gear 18 Amount position.I.e. so that when observing from radial direction, the position L18 and head 80A that little gear 18 is engaged with distribution gear 16 will not Overlap.

Then, the effect to the deceleration device 10 of the eccentric oscillating-type is illustrated.

If motor 13 rotates, the little tooth with motor opposite side end (the other end) 12D of input shaft 12 is formed at Wheel 18 rotates.As little gear 18 is engaged with 3 distribution gears 16 simultaneously, therefore by the little gear 18 and distribution gear 16 Engagement, 3 bent axles 22 are with the state of the gear ratio deceleration according to little gear 18 and distribution gear 16 in the same direction with same turn Fast synchronous rotary.

As a result, being respectively formed at 3 26 synchronous rotaries of the 1st eccentric body of the axial same position of each bent axle 22 and making 1 external gear 32 swings, and is respectively formed at 3 28 synchronous rotaries of the 2nd eccentric body of the axial same position of bent axle 22 and makes 2nd external gear 36 swings.

Due to the 1st external gear 32, the 2nd external gear 36 respectively with 24 internal messing of internal gear, therefore the 1st external gear the 32, the 2nd outside Gear 36 often swings 1 time, and the 1st external gear 32, the phase place of the circumferencial direction of the 2nd external gear 36 are offset relative to internal gear 24 (rotation) suitable amount (being 1 tooth amount in present embodiment) poor with the number of teeth.The rotation composition surrounds internal gear as each bent axle 22 The revolution of 24 axle center O1 and be transferred to the 1st wheel carrier 40, the 2nd wheel carrier 42.

1st wheel carrier 40, the 2nd wheel carrier 42 are connected to each other by wheel carrier pin 54 and wheel carrier bolt 56, as a result, by input shaft 12 Rotation, the 2nd arm for being linked to the 1st wheel carrier 40 can be made to rotate against relative to the 1st arm for being linked to shell 52.

Here, in the deceleration device 10, various sliding surfaces or plane of rotation are lubricated by lubricant.Lubricant passes through oil sealing 62nd, 64 or coat with the liquid liner in gap etc. between object machinery and be sealed in the inner space P1 of deceleration device 10 It is interior, and the space outerpace P2 of (inside comprising motor 13) deceleration device 10 will not be leaked into.

However, in the past, when various mal-conditions occur simultaneously, occurred lubricant via input shaft 913 (Fig. 5) occasionally Bolt-inserting hole 929 leak into the problem of motor-side.Also, when exploitation can solve the problem that the technology of the problem, inventor etc. Structure around conventional input shaft 913 is checked, so as to obtain following opinion.

For the ease of understanding the opinion, again the structure around conventional input shaft 913 is illustrated using Fig. 5.

In the past when input shaft 913 is manufactured, using following processing method：By (lathe) a pair of thimbles, (front end is with circle The support tool that taper is fined away, omits diagram) clamping the axle center part at the axial both ends of the input shaft 913, and make input In the state of axle 913 rotates, cut the periphery of the input shaft 913 or form little gear 925.Specifically with the example of Fig. 5 for, Chamfered section CH919 and bolt-inserting hole of the sandwiched supported portion of conventional thimble for the inner peripheral of motor shaft insertion hole 919 Chamfered section CH929 of 929 inner peripheral.

When clamping chamfered section CH919, CH929 to be processed to input shaft 913, in order to stably support the input shaft 913, therefore, to assure that larger these become the chamfer amount of chamfered section CH919, CH929 of supported portion.Therefore, in the past, especially The chamfer amount of chamfered section CH929 of the inner peripheral of bolt-inserting hole 929 is set as than required by the bolt-inserting hole 929 originally Chamfer amount it is bigger.

And it was found that, this is set as that larger chamfered section CH929 becomes lubricant leakage to the main cause of motor-side.

However, in order to ensure the stability of supporting during processing, actually it is difficult to by the inner peripheral of the bolt-inserting hole 929 Chamfered section CH929 chamfer amount be set as it is less.

Therefore, present embodiment is configured to as follows：2nd chamfered section CH2 required by bolt-inserting hole 12G itself is realized Function and be formed separately as the position of the function of the 1st chamfered section CH1 of supported portion when being processed to input shaft 12, So as to guarantee respective function with different positions respectively.

Specifically, in the input shaft 12 of this deceleration device 10, in end (the other end) 12D with motor opposite side Axial end 12F the bolt-inserting hole 12G that runs through towards motor shaft insertion hole 12B from end face 12F is set.The bolt is inserted Hole 12G be the large-diameter portion 12G1 with the head 80A configurations for the binder bolt 80 and axle portion 80B for binder bolt 80 and The structure of the minor diameter part 12G2 that threaded portion 80C is inserted through.Also, make binder bolt 80 be inserted in bolt-inserting hole 12G and with formation Screw togather in the screw 14B of the axial end 14A of motor drive shaft 14, and the head 80A of binder bolt 80 is twisted across seal washer 90 Enter to the bottom surface 12G1a with large-diameter portion 12G1 and abut, so as to link input shaft 12 and motor drive shaft 14.

Therefore, in present embodiment, can be by the 1st chamfered section of the supported portion become when being processed to input shaft 12 The chamfer amount of CH1 and the 4th chamfered section CH4 by it is respective radially formed height become Hch1, Hch4 in the way of be set as compared with (leakage of lubricant need not be considered) greatly.Also, the chamfer amount of the 2nd chamfered section CH2 with respect to bolt-inserting hole 12G (formation height Hch2 radially), (without the need for considering to guarantee the stability of supporting when being processed to input shaft 12) energy Enough suppress into necessary minimal chamfer amount (Hch4 ＞ Hch1 ＞ Hch2).Also, under the state, in the head of binder bolt 80 Seal washer 90 is configured between the bottom surface 12G1a of portion 80A and large-diameter portion 12G1.As a result, can maintain well to input While supporting when axle 12 is processed, the inner space P1 of deceleration device 10 and the inside for including motor 13 are further improved Deceleration device 10 space outerpace P2 sealing property.In other words, as the chamfer amount of the 2nd chamfered section CH2 is less, therefore energy Enough be enough to seal between binder bolt 80 and input shaft 12 by seal washer 90.

Also, in the past binder bolt 927 is installed in itself with the end face 921A of motor opposite side in input shaft 913, Therefore the head 927A of binder bolt 927 has to from the end face 921A of input shaft 913 expose, but according to present embodiment, energy It is enough that the head 80A of binder bolt 80 is configured completely and is contained in large-diameter portion 12G1, therefore the head 80A of binder bolt 80 is not Can project from the end face 12F of input shaft 12.

Also, for the position of head 80A (927A), in the past, the head 927A of binder bolt 927 is overall from input The end face 921A of axle 913 exposes, therefore, lubricant is sometimes because certain reason is splashing at binder bolt 927 compared with strong pressure Chamfered section CH929.However, according to present embodiment, after lubricant is first into large-diameter portion 12G1, by binder bolt 80 Small gap between the periphery of head 80A and the inner circumferential of large-diameter portion 12G1, then angle will be penetrated into be changed into footpath and just reach backward The 2nd chamfered section CH2 at binder bolt 80.Therefore, when lubricant reaches 2 chamfered section CH2, the force of the lubricant is obvious Weaken, from this point of view, lubricant is also difficult to leak.

And, in the embodiment, axial length L 12G1 of the large-diameter portion 12G1 of bolt-inserting hole 12G is set as that this is big The bottom surface 12G1a of footpath portion 12G1 is positioned at the position L18 engaged with distribution gear 16 than little gear 18, or even ratio and little gear 18 Facewidth W18 (the axially position P18 most by motor-side) more leans on the position of the amount of 13 side δ L18 of axial motor.Therefore, input shaft 12 radial thickness is uniform throughout facewidth W18 of whole little gear 18, thus, the tooth contact of little gear 18 and distribution gear 16 Also it is uniform, and it is able to maintain that good engagement.

Especially, the structure nonessential structure, according to the axial location with the axial dimension and distribution gear of input shaft Relation etc., it is also possible to the bottom surface for being designed to such as large-diameter portion is located at the axial location that little gear is engaged with distribution gear.

Also, in above-mentioned embodiment, show following configuration example：Deceleration device 10 is the bias with multiple bent axles 22 The deceleration device of oscillating-type, is multiple distribution gears 16 for being arranged at bent axle 22 with 18 meshed gears of little gear.This structure Deceleration device 10 in, the little gear 18 of input shaft 12 is more with the meshing point of distribution gear 16, also, lubricant pass through little tooth Take turns the rotation of the multiple distribution gears 16 around 18 and stirred around the revolution of little gear 18 energetically.Also, it is also easy to produce defeated Enter the micro-vibration of axle 12.Therefore, become the knot that lubricant is easily leaked from the bolt-inserting hole 12G of input shaft 12 from the beginning Structure.Advantage therefore, it is possible to guarantee the processability and good sealing of input shaft 12 simultaneously is especially big.

However, deceleration device involved in the present invention is not necessarily the deceleration dress of the reducing gear with this structure Put, the deceleration of the reducing gear alternatively with simple planetary gear speed reducing mechanism, parallel axle speed reducing machine structure or orthogonal reducing gear etc. Device.Certainly, distribution gear is also not limited to little gear meshed gears.Also, little gear is also not limited to spur pinion, Helical gear or orthogonal little gear etc. are alternatively for example.

Also, in above-mentioned embodiment, it is configured to motor drive shaft 14 and is inserted directly in itself and is linked to motor shaft insertion hole 12B.However, the present invention is not limited to this, for example, also may be configured as the axle insertion of motor drive shaft 14 is linked to by shaft coupling etc. And it is linked to motor shaft insertion hole 12B.That is, motor drive shaft of the invention includes being linked to the output shaft of motor by shaft coupling etc. And the axle rotated integrally with the output shaft of motor.

Claims (8)

1. a kind of deceleration device, which has input shaft, and there is the input shaft motor drive shaft for motor drive shaft insertion to insert in portion at one end Enter hole, and the little gear engaged with the gear of deceleration device be provided with the other end, the deceleration device is characterised by,

With bolt-inserting hole, the bolt-inserting hole is from the end face of described the other end of the input shaft towards the motor drive shaft Patchhole runs through, and is inserted with the bolt for linking with motor drive shaft,

The path that large-diameter portion of the bolt-inserting hole with the header arrangement for the bolt and the axle portion for the bolt are inserted through Portion,

1st chamfered section is formed with the inner peripheral of motor opposite side in the large-diameter portion, the minor diameter part and motor The inner peripheral of opposite side is formed with the 2nd chamfered section,

Chamfer amount of the chamfer amount of the 1st chamfered section more than the 2nd chamfered section,

Seal washer is configured between the bottom surface of the head and the large-diameter portion of the bolt,

The chamfer amount is chamfered section formation height diametrically.

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

The axial length of the large-diameter portion be set to the axial location of the bottom surface of the large-diameter portion positioned at than the little gear with Axial motor side is more leaned at the position of the gear engagement.

3. deceleration device according to claim 2, it is characterised in that

The axial length of the large-diameter portion is set to the axial location of the bottom surface of the large-diameter portion positioned at than the little gear Motor-side is more leaned in end.

4. deceleration device according to claim 2, it is characterised in that

The axial length of the large-diameter portion be set to from radial direction observe when, the head of the bolt and the little gear and the tooth The position of wheel engagement does not overlap.

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

The axial length of the large-diameter portion be set to from radial direction observe when, the head of the bolt and the little gear and the tooth The position of wheel engagement does not overlap.

6. the deceleration device according to any one of Claims 1 to 5, it is characterised in that

The deceleration device is the deceleration device of the eccentric pendulum-type with multiple bent axles, and the tooth engaged with the little gear Take turns to be arranged at the gear of the bent axle.

7. the deceleration device according to any one of Claims 1 to 5, it is characterised in that

The chamfer amount of the 1st chamfered section is more than 2 times of the chamfer amount of the 2nd chamfered section.

8. deceleration device according to claim 6, it is characterised in that

The chamfer amount of the 1st chamfered section is more than 2 times of the chamfer amount of the 2nd chamfered section.