JP6111361B1 - Transmission - Google Patents

Abstract

A transmission device having high power transmission efficiency, simple attachment / detachment work, and capable of quickly adjusting parts. An outer ring member including at least one outer gear and an outer ring member coaxially connected to at least one outer gear and having a central axis, and a cam coupling portion on an outer peripheral surface thereof. A plurality of shafts and a plurality of cams that are detachably fitted to a plurality of cam coupling portions, rotate in synchronization with the shaft, and at least two of them have a plurality of cams having an angular phase difference that is not zero And a plurality of back gears, each of which is made of a rigid material and is fitted to each of the plurality of cam members and does not rotate together with each of the plurality of cam members and partially meshes with at least one outer gear. [Selection] Figure 1

Description

  The present invention relates to a transmission.

  The mechanical mechanism can be accelerated or decelerated by a general transmission. This achieves acceleration or deceleration depending on the gear ratio. However, when the gear ratio is large, the transmission has a large volume. Therefore, it is required to develop a transmission having a larger gear ratio under a specific volume condition.

  However, in the conventional transmission, a plurality of cam members are directly fixed to the shaft. If any one of the cams fails or if it is desired to change the number of cam members, it is necessary to replace the cam members and shaft together. Since the back gear and the outer gear are in surface contact, the frictional force is larger and affects the transmission of power. In the conventional transmission, there is a gap between the cam member and the back gear, and since the back gear employs a material that can be bent, it is between the cam member and the back gear and between the back gear and the external gear. Since the back gear has insufficient rigidity or does not have a mechanism for assisting the operation, the power transmission efficiency is lowered and the accuracy is insufficient.

  SUMMARY OF THE INVENTION The main object of the present invention is to provide a transmission that increases the power transmission efficiency, increases the accuracy and stability of operation, speeds up and removes, and allows adjustment of the internal mechanism. It is in.

  The transmission of the present invention includes an outer ring member including at least one outer gear therein, and is pivotally attached to the outer ring member coaxially with the at least one outer gear. A shaft provided with a plurality of coupling portions and a plurality of cam coupling portions are detachably fitted, and rotate in synchronism with the shaft, at least two of which have an angular phase difference that is not zero. A plurality of cam members and a plurality of back gears, each of which is provided with a rigid material and fitted to each of the plurality of cam members, does not rotate with the plurality of cam members, and each meshes with at least one outer gear, It is characterized by including.

  The speed change device of the present invention has the effects that the transmission efficiency of power increases, the accuracy and stability of operation increase, the detachment operation becomes quick, and the internal mechanism can be adjusted.

1 is a perspective view showing a transmission according to a first embodiment of the present invention. 1 is a perspective view showing a transmission according to a first embodiment of the present invention. 1 is an exploded perspective view showing a transmission according to a first embodiment of the present invention. It is sectional drawing which shows the transmission which concerns on the 1st Embodiment of this invention. It is an enlarged view which shows the arc-shaped tooth which concerns on the 1st Embodiment of this invention. It is an enlarged view which shows the arc-shaped tooth which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the transmission which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the transmission which concerns on the 2nd Embodiment of this invention. It is the schematic which shows the cam which concerns on the 3rd Embodiment of this invention. It is the schematic which shows the cam which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
Please refer to FIG. 1 to FIG. The transmission 1 according to the present embodiment includes an outer ring member 2, a shaft 3, a plurality of cam members 5, and a plurality of back gears 6.

An outer gear 21 is disposed inside the outer ring member 2. The shaft 3 and at least one outer gear 21 are pivotally connected to the outer ring member 2 coaxially. The shaft 3 has a central axis 30 and a plurality of cam coupling portions 31 are provided on the outer peripheral surface thereof.
The plurality of cam members 5 are detachably fitted to the plurality of cam coupling portions 31, respectively, and can rotate in synchronization with the shaft 3, and at least two of them have an angular phase difference whose numerical value is not zero. Have. The plurality of back gears 6 are made of a rigid material and are respectively fitted and provided on the plurality of cam members 5, and do not rotate together with the plurality of cam members 5, but respectively mesh with at least one outer gear 21. As a result, each cam member 5 of the transmission 1 is detachably fixed to the shaft 3, so that the cam member 5 can be independently replaced and can be assembled at different angles as necessary, thereby reducing costs. is there.
Since the plurality of back gears 6 perform the surround swing synchronously and drive at least one outer gear 21, the force received by each back gear 6 can be reduced. This increases the power transmission efficiency and increases the accuracy and stability of the operation.

In the present embodiment, the transmission 1 further includes a plurality of auxiliary cam members 4 and a plurality of support members 7 fixed to the outer ring member 2. The support member 7 increases the stability and structural strength of the transmission 1 as a whole.
Each auxiliary cam member 4 is fitted to a shaft 41 pivotally attached to the outer ring member 2, an auxiliary cam 42 fitted to the shaft 41 and rotating in synchronization with the shaft 41, and the auxiliary cam 42. Auxiliary bearing 43. Each back gear 6 has a center hole 61 that fits with one of the cam members 5 and a plurality of perforations 62 provided around the center hole 61. The plurality of auxiliary cam members 4 pass through the plurality of perforations 62, respectively. Each perforation 62 fits with one of the auxiliary bearings 43. The direction in which the plurality of auxiliary cam members 4 and the work curved surfaces of the cam members 5 face the same back gear 6 is the same.
Each auxiliary cam member 4 stabilizes the operation of the outer gear 21 and increases the force transmission efficiency. Each back gear 6 is further provided with a plurality of arc guide grooves 63 provided around the center hole 61. Since each arc guide groove 63 is fitted to one of the support members 7 and an annular play 71 exists between them, the operation of the back gear 6 becomes smooth.

In the present embodiment, each cam coupling portion 31 includes four (or one) axial flat cut plane 32. The four axial flat cut planes 32 have an opening angle of 90 degrees between any two adjacent axial flat cut planes. Each cam member 5 preferably has a fitting hole 53 whose shape penetrates corresponding to the cam coupling portion 31. Each cam member 5 includes a cam 52 that fits with one of the cam coupling portions 31, and a back bearing 55 that is fitted to the cam 52.
Each back gear 6 is fitted with one of the back bearings 55. The outer shape of each cam 52 and the corresponding back bearing 55 has a circular shape, and they are closely fitted to each other. As a result, the force is directly transmitted and the strength of the structure is increased, so that the cam 52 and the back bearing 55 are not easily damaged. At least one tooth portion of the outer gear 21 and the back gear 6 is an arcuate tooth 64. Both the outer gear 21 and the back gear 6 are preferably arcuate teeth 64.
The arcuate teeth 64 are composed of a plurality of arcs that are continuous with each other and have different radii of curvature. Thereby, each tooth | gear part with which the outer gear 21 and the back gear 6 mesh is slidable, and since it is a tangential contact, friction reduces. Each cam 52 has a fitting hole 53 therethrough. The wall surface of each fitting hole 53 is closely fitted with the corresponding cam coupling portion 31. Four axial contact flat surfaces 54 are provided on the wall surface of each fitting hole 53. The four axial contact planes 54 are in contact with the four axial flat cut planes 32, so that the shaft 3 can drive the cam 52. Since the plurality of cams are fitted to the shaft 3 at the same angle (may be different angles), the force applied to the outer gear 21 of the back gear 6 becomes uniform.

In the present embodiment, the outer ring member 2 further includes two cases 24, two pedestals 25, and two pedestal bearings 26.
Each outer gear 21 is provided with a plurality of through holes 22. The plurality of pins 27 are inserted into the two cases 24 through a part of these through holes 22. The plurality of fastening members 28 pass through the two cases 24 and a part of these through holes 22. The two outer gears 21 are sandwiched between the two cases 24. The two pedestal bearings 26 are respectively fitted on the two pedestals 25 and are located on both sides of the plurality of back gears 6. The two pedestal bearings 26 abut against the two cases 24 and the two outer gears 21, respectively.
The shaft 3 passes through the two outer gears 21, the two pedestals 25, and the two pedestal bearings 26. The plurality of support members 7 are detachably fixed to the two pedestals 25. Thereby, the two bases 25 are stably positioned inside the transmission 1.

Seal rings 29a, 29b, and 29c are provided between the shaft 3 and each pedestal 25, between each pedestal 25 and each case 24, and between the two cases 24, respectively. A plurality of passage grooves 23 along the radial direction are provided on the outer peripheral surface of each outer gear 21. Each through hole 22 communicates with one of the passage grooves 23. Since gaps 65 are formed between the plurality of back gears 6 and the pedestals 25, friction is reduced.
It is preferable that a lubricating material is further provided between the outer ring member 2 and the plurality of cam members 5, and the lubricating material flows inside the transmission 1. Thereby, the friction between each component can be reduced. The seal rings 29 a, 29 b, and 29 c can prevent the lubricant from leaking out of the transmission device 1 or preventing foreign matter from entering the transmission device 1.

  The cam member 5 is driven by the rotation of the shaft 3, and the back gear 6 swings around the outer gear 21 synchronously. Thereby, without using another gear, the transmission 1 can have a larger gear ratio, and the volume of the transmission 1 can be reduced. Thus, by rotating the outer gear 21, the back gear 6 is driven to surround and swing, and the power is output via the shaft 3, so that a larger gear ratio can be obtained.

(Second Embodiment)
Please refer to FIG. The transmission 1a changes the shaft 3a having different lengths, the number of back gears 6a, and the axial thickness of the outer gear 21a (in another embodiment, the number of outer gears may be adjusted as necessary). By doing so, it is possible to make the forces received by the back gear 6a and the outer gear 21a uniform.

(Third embodiment)
Please refer to FIG. 9 and FIG. The fitting hole 53c of the cam 52c and the fitting hole 53d of the cam 52d may be different in length, direction and position in the radial direction. In other words, it is preferable that the operation of the back gear and the external gear can be stabilized.

  The cam coupling portion of each shaft includes a plurality of axial flat cut planes, and each cam member has a fitting hole therethrough, and one axial contact plane is provided on the wall surface of each fitting hole. The axial contact planes (for example, the cams shown in FIGS. 9 and 10) are in contact with different axial flat cut planes, or the transmission shaft is provided with one axial flat cut plane. The member has a fitting hole that penetrates, and a wall surface of each fitting hole is provided with an axial contact plane that contacts the axial flat cut plane. At least two of these axial flat cut planes are provided. One may have an angular phase difference whose value is not zero. However, the cam member of the transmission may be fixed to the shaft so as to be detachable.

  The shaft of each auxiliary cam member may extend beyond the pedestal and mesh with another active gear by mating with at least one passive gear. The shaft of the transmission and the cam member do not have to be closely fitted.

  Since a plurality of back gears operate simultaneously and a plurality of auxiliary cam members are used, the transmission according to the present invention increases accuracy and stability and increases the life of the transmission. The transmission according to the present invention has high power transmission efficiency, is easy to detach and attach, and can adjust parts quickly.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

  The present invention can be applied to a transmission.

1, 1a Transmission 2 Outer ring member 3, 3a Shaft 4 Auxiliary cam member 5 Cam members 6, 6a Back gear 7 Support member 21, 21a Outer gear 22 Through hole 23 Passing groove 24 Case 25 Base 26 Base bearing 27 Pin 28 Fastening Member 29a, 29b, 29c Seal ring 30 Center axis 31 Cam coupling part 32 Axial flat cut plane 41 Axis 42 Auxiliary cam 43 Auxiliary bearings 52, 52c, 52d Cams 53, 53c, 53d Fitting hole 54 Axial contact plane 55 Back Bearing 61 Center hole 62 Drilling 63 Arc guide groove 64 Arc tooth 65 Clearance 71 Annular play

Claims (9)

An outer ring member including at least one outer gear therein;
A shaft pivotally attached to the outer ring member coaxially with at least one outer gear, having a central axis, and having a plurality of cam coupling portions on an outer peripheral surface thereof;
A plurality of cam coupling portions are detachably fitted, rotate in synchronization with the shaft, at least two of which have a plurality of cam members having an angular phase difference that is not zero,
Adopted rigid material, is provided fitted in each of a plurality of said cam member does not rotate together with the plurality of the cam member, seen including a plurality of back gears meshing at least one said outer gear and part of the basis, respectively, the ,
Each auxiliary cam member includes a shaft pivotally attached to the outer ring member, an auxiliary cam that fits the shaft and rotates synchronously with the shaft, and is fitted to the auxiliary cam. An auxiliary bearing provided,
Each of the back gears has a center hole that fits with one of the cam members, and a plurality of perforations provided around the center hole,
A plurality of auxiliary cam members each passing through the plurality of perforations, each of the perforations being fitted with one of the auxiliary bearings;
With respect to the same back gear, the plurality of auxiliary cam members and the direction of the cam member facing the work curved surface are the same ,
Transmission device.   Each of the cam coupling portions includes at least one axial flat cut plane, and each of the cam members has a fitting hole penetrating in a shape corresponding to an outer shape of the cam coupling portion. Item 2. The transmission according to Item 1.   Each of the cam members includes a cam that fits into one of the cam coupling portions, and a back bearing that is fitted to the cam, and each of the back gears includes one of the back bearings. The transmission according to claim 1, wherein the transmission is fitted.   4. The transmission according to claim 3, wherein the outer shape of each of the cams and the corresponding back bearing has a circular shape, and the two are closely fitted to each other.   The shaft is provided with an axial flat cut plane, each cam member has a fitting hole therethrough, and the wall surface of each fitting hole is in axial contact with the axial flat cut plane. The transmission according to claim 1, wherein a plane is provided, and at least two of the axial flat cut planes have an angular phase difference that is not zero. Furthermore, it includes a plurality of support members fixed to the outer ring member, and each back gear is provided with a plurality of arc guide grooves that are provided around the center hole and pass therethrough. guide groove is engaged with one of the support member, characterized in that there is an annular clearance therebetween, the transmission apparatus according to claim 1.   At least one tooth portion of the outer gear and the back gear is an arcuate tooth, and the arcuate tooth is composed of a plurality of arcs that are continuous with each other and have different radii of curvature, and the outer gear and the back gear; 2. The transmission according to claim 1, wherein each of the meshing gears is slidable and has a tangential contact.   A plurality of through holes are provided in each outer gear, and a plurality of passage grooves along the radial direction are provided on the outer peripheral surface of the outer gear. A gap is formed between the plurality of back gears and the outer ring member, and a lubricating substance is further provided between the outer ring member and the plurality of cam members. The transmission according to claim 1. Each of the cam coupling portions includes four axial flat cut planes, and the four axial flat cut planes have an opening angle of any two adjacent axial flat cut planes of 90 degrees, Each cam member has a fitting hole whose shape penetrates corresponding to the cam coupling portion, and each cam member is provided with a cam fitted to one of the cam coupling portions, and fitted to the cam. Each back gear engages with one of the back bearings, and the outer shape of each cam and the corresponding back bearing is circular, and the two are in close contact with each other. At least one tooth portion of the outer gear and the back gear is an arcuate tooth, and the arcuate tooth is composed of a plurality of arcs that are continuous with each other and have different radii of curvature. And the teeth that mesh with the back gear Each cam has a fitting hole therethrough, and the wall surface of each fitting hole is closely fitted with the corresponding cam coupling portion, Four axial contact planes are provided on the wall surface of the fitting hole, and the four axial contact planes are in contact with the four axial flat cut planes, and the plurality of cams are the same. The outer ring member further includes two cases, two pedestals, and two pedestal bearings, and each outer gear has a plurality of through holes. A plurality of pins are inserted through the two through-cases and inserted into the two cases, and a plurality of fastening members are provided between the two cases and the through-holes. At least one of the outer gears is inserted into the two casings. The two pedestal bearings are respectively fitted to the two pedestals, and are respectively located on both sides of the plurality of back gears, and the two cases and at least one outer gear. The shaft passes through at least one of the outer gear, the two pedestals, and the two pedestal bearings, and the plurality of support members are detachably fixed to the two pedestals. A seal ring is provided between the shaft and each pedestal, between each pedestal and each case, and between the two cases, and is provided on the outer peripheral surface of each outer gear. Is provided with a plurality of passage grooves along its radial direction, each through hole communicates with one of the passage grooves, a gap is formed between the plurality of back gears and each pedestal, The outer ring member; The transmission according to claim 6 , further comprising a lubricating material between the plurality of cam members.

Images