TWM528383U - Flexible transmission device and harmonic speed reducer thereof - Google Patents

Description

Flexible transmission member and harmonic reduction device thereof

The present invention relates to the technical field of a reduction gear, and more particularly to a flexible transmission member with a long service life and a harmonic reduction device thereof.

The harmonic reduction device is a mechanical transmission shifting mechanism, which has the characteristics of light weight and small volume compared with the general gear transmission. The harmonic reduction device has a large transmission ratio range, so the transmission efficiency is high, the transmission precision is high, and the bearing capacity is strong, and the utility model can be widely used in various industrial fields. In general, harmonic reduction devices are often used in applications with high reduction ratios.

The structure of the harmonic reduction device mainly includes a harmonic unit, a flexible external gear and a rigid internal gear. The harmonic unit has an elliptical shape with a long axis and a short axis, and the harmonic unit is usually connected to the input shaft of the driving unit. The flexible externally toothed gear has a thin shape and is flexible, and exhibits a cup-shaped outer shape. The harmonic unit is inserted in the flexible external gear, the flexible external gear is threaded in the rigid internal gear, and the external gear of the flexible external gear meshes with the internal gear of the rigid internal gear. . During the rotation of the harmonic unit, the external gear of the flexible external gear corresponding to the long axis position of the harmonic unit is intermittently pushed by the harmonic unit to mesh with the rigid internal gear, and is flexible The external external gear corresponds to the short axis position of the harmonic unit and the gear is completely separated from the internal gear. Since the harmonic unit deforms the flexible external gear to achieve partial meshing, the flexible external gear is unevenly stressed, resulting in damage to the flexible external gear, not only the external gear and the internal gear are not accurate. Engagement also affects the force output shaft to transmit power. In addition, even a situation in which the flexible externally toothed gear is broken may occur. That is, the flexible external gear affects the service life.

As mentioned above, the creators of this creation have designed a flexible transmission component and its harmonic reduction device after years of research, in order to improve the lack of the prior art, and to enhance the industrial implementation.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a flexible transmission member and a harmonic reduction device thereof to improve the problems caused by the above-mentioned prior art.

According to the purpose of the present invention, a flexible transmission member is provided for use in a harmonic reduction device. The flexible transmission member comprises a transmission body, a gear portion and a circular rib. The transmission body has a cup-shaped structure, and the transmission body has a waist portion at one side and an end surface portion connected to one end of the side waist portion. The gear portion is disposed at the side waist and adjacent to the other end of the side waist. The circular arc rib is arc-shaped and smoothly disposed on the side waist portion, and is located between the gear portion and the end surface portion.

Preferably, the circular arc rib may be located on the side waist of the midpoint between the gear portion and the end face portion.

Preferably, the end face portion is gradually thinned from the center to the side waist direction and has a thickness consistent with the side waist portion.

Preferably, the end surface portion further has a step portion, and the step portion is disposed at the center of the end surface portion.

Preferably, the plurality of strips are further arranged at an equiangular radial arrangement on the body of the transmission member, and the plurality of strips are located at a portion of the end face portion and a portion of the side waist portion, and each strip gap is further The utility model comprises a plurality of enlarged portions which are respectively located at two ends of the long strip notch, the width of the enlarged portion is larger than the width of the long strip notch, and the connecting portion of the enlarged portion and the long strip is provided with a lead angle.

According to the purpose of the present invention, there is further provided a harmonic reduction device comprising an internal gear, a flexible transmission and a harmonic unit. The internal gear is configured to transmit power to a load. The flexible transmission member comprises a transmission body, a gear portion and a circular rib. The transmission body has a cup-shaped structure, and the transmission body has a waist portion at one side and an end surface portion connected to one end of the side waist portion. The gear portion is disposed at the side waist and adjacent to the other end of the side waist. The circular arc rib is arc-shaped and smoothly disposed on the side waist portion, and is located between the gear portion and the end surface portion. The harmonic unit is disposed inside the flexible transmission member and configured to be connected to a driving unit, and the harmonic unit is an elliptical structure to deform the flexible transmission member, and the gear portion of the flexible transmission member is further Both ends of the harmonic unit are partially meshed with the internal gear in the long axis direction.

Preferably, the circular arc rib may be located on the side waist of the midpoint between the gear portion and the end face portion.

Preferably, the end face portion is gradually thinned from the center to the side waist direction and has a thickness consistent with the side waist portion.

Preferably, the end surface portion further has a step portion, and the step portion is disposed at the center of the end surface portion.

Preferably, the plurality of strips are further arranged at an equiangular radial arrangement on the body of the transmission member, and the plurality of strips are located at a portion of the end face portion and a portion of the side waist portion, and each strip gap is further The utility model comprises a plurality of enlarged portions which are respectively located at two ends of the long strip notch, the width of the enlarged portion is larger than the width of the long strip notch, and the connecting portion of the enlarged portion and the long strip is provided with a lead angle.

The technical features of the present invention will be described in detail below with reference to the accompanying drawings in the accompanying drawings, so that those skilled in the art can readily understand the purpose, technical features, and advantages of the present invention.

In order to understand the technical characteristics, content and advantages of the creation and the effects that can be achieved by the examiner, the author will use the drawings in detail and explain the following in the form of the examples, and the drawings used therein The subject matter is only for the purpose of illustration and supplementary instructions. It is not necessarily the true proportion and precise configuration after the implementation of the original creation. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted or limited in the actual implementation scope. First described.

The embodiments of the flexible transmission member and its harmonic reduction device according to the present invention will be described below with reference to the related drawings. For ease of understanding, the same components in the following embodiments are denoted by the same reference numerals.

Please refer to Fig. 1, which is a schematic view of a first embodiment of the flexible transmission member of the present invention. The flexible transmission member of the present invention is mainly applied to a harmonic reduction device. That is, the flexible transmission member of the present invention can be a flexible external gear, commonly known as a soft cup.

As shown, the flexible transmission member 1 of the present invention includes a transmission body 10, a gear portion 11, and a circular rib portion 12. Wherein, the transmission body 10 can be made of a metal material, such as plastic steel, which has a substantially cup-shaped structure and has a relatively thin thickness. Since the transmission body 10 has a substantially cup-like structure, one side waist portion 101 and an end surface portion 102 connected to one end of the side waist portion 101 can be distinguished. The gear portion 11 is disposed on the side waist portion 101 of the transmission body 10, and preferably the gear portion 11 is adjacent to the other end of the side waist portion 101. That is, the end surface portion 102 and the gear portion 11 are respectively at both ends of the side waist portion 101, and the gear portion 11 is an external gear of the flexible transmission member 1.

The circular arc rib 12 is disposed on the side waist portion 101 in a circular arc and surrounds the entire side waist portion 101, and the circular arc rib portion 12 can be located at any position between the end surface portion 102 and the gear portion 11. However, in a preferred embodiment, the circular rib 12 may be disposed on the side waist portion 101 at the midpoint between the gear portion 11 and the end surface portion 102.

Please refer to FIG. 2 together, which is a schematic cross-sectional view of the first embodiment of the flexible transmission member. Figure 2 shows the arcuate ribs 12 which may be less noticeable in Figure 1. In a preferred embodiment, a through hole 1021 may be formed at the center of the end surface portion 102, and the end surface portion 102 is gradually thinned by the through hole 1011 toward the side waist portion 101. That is, the end surface portion 102 of the transmission body 10 is gradually thinned from the inside to the outside, and is finally the same thickness as the side waist portion 101. In addition, in a preferred embodiment, the end portion 102 may be provided with a step portion 1022. The step portion 1022 is disposed around the through hole 1021.

The flexible transmission member 1 of the present invention is mainly provided by the arc ribs 12, thereby effectively dispersing or homogenizing the stress that the flexible transmission member 1 is subjected to during transmission, as shown in Figures 5 and 6. 5 is the stress distribution of the flexible transmission member 1 in the original state, and FIG. 6 is the stress distribution of the flexible transmission member 1 when deformed. As can be seen from the figure, the present invention can effectively prevent the deformation of the flexible transmission member 1 from being damaged, and the precise engagement cannot affect the power transmission, and the flexible transmission member 1 may be broken, thereby greatly increasing or Extend the service life of the harmonic reduction device to which the flexible transmission member 1 is applied. In addition, the flexible transmission member 1 of the present invention is configured to be gradually thinned from the inside to the outside by the end surface portion 102, thereby further effectively dispersing or homogenizing the stress that the flexible transmission member 1 is subjected to during transmission.

Please refer to FIG. 3, which is a schematic view of a second embodiment of the flexible transmission member of the present invention. In the present embodiment, the configuration and operation of the components of the same component symbols are similar to those of the previous embodiment, and the similarities are not described herein.

The main difference between this embodiment and the previous embodiment is that the flexible transmission member 1 further includes a plurality of elongated strips 13 which are equiangularly spaced and radially arranged on the transmission body 10. The plurality of strips 13 are mainly located on the partial end surface portion 102 and the partial side waist portion 101.

Further, each of the strip gaps 13 further includes a plurality of enlarged portions 131. The enlarged portion 131 may preferably have a circular shape or other geometric shape having a lead angle at a corner, and the enlarged portions 131 are respectively located at both ends of the elongated notch 13. It should be noted that the width of the enlarged portion 131 may be the width of the large strip 13 and the angle between the enlarged portion 131 and the strip 13 may be provided with a lead angle, thereby avoiding stress concentration on the enlarged portion 131 and the length. The corner of the joint of the strip 13 is.

The flexible transmission member 1 of the present invention is further configured to effectively disperse or homogenize the stress experienced by the flexible transmission member 1 during transmission by the configuration of the elongated notch 13.

Please refer to Fig. 4, which is a schematic structural view of the harmonic reduction device of the present invention. The harmonic reduction device 100 of the present invention is mainly applied to a transmission and shifting mechanism of a mechanical mechanism. The flexible transmission member, internal gear and harmonic unit of Fig. 4 are shown in a simplified manner.

As shown, the harmonic reduction device 100 of the present invention comprises a flexible transmission member 1, an internal gear 2 and a harmonic unit 3. The internal gear 2 is a rigid gear having an accommodating space for accommodating the flexible transmission member 1 and the harmonic unit 3. The internal gear 2 is primarily configured to transmit to a load (not shown), for example the internal gear 2 can have a power transmission shaft to connect to the load and transmit power. The flexible transmission member 1 is as described above and will not be described again. The flexible transmission member 1 is coaxially disposed within the internal gear 2, and since the flexible transmission member 1 has a cup-like structure, the flexible transmission member 1 can accommodate the harmonic unit 3. The harmonic unit 3 is coaxially disposed inside the flexible transmission member 1. The harmonic unit 3 is mainly an elliptical structure, and is connected at its center to a driving unit (not shown). The driving unit can be, for example, a motor, and the rotating shaft of the motor can be connected to the center of the harmonic unit 3. . The harmonic unit 3 deforms the flexible transmission member 1, and the gear portion 11 of the flexible transmission member 1 is partially meshed with the internal gear 2 at both ends in the long-axis direction of the harmonic unit 3.

Incidentally, the harmonic reduction device 100 of course further includes components such as bearings and housings, but it is not the focus of the present invention, and is well known to those of ordinary skill in the art. I will not repeat them.

Further, when the driving unit drives the harmonic unit 3 to rotate, the harmonic unit 3 drives the flexible transmission member 1 to rotate, and since the flexible transmission member 1 has flexibility, the flexible transmission member 1 The outer shape of the side waist portion 101 is continuously deformed, so that the gear portions 11 at both ends in the long axis direction of the harmonic unit 3 are successively meshed with the internal gear 2, and the internal gear 2 is driven to rotate. The tooth gear 2 transmits power to the load.

In summary, the flexible transmission member and the harmonic reduction device thereof of the present invention are mainly provided by the arrangement of the arc ribs, or the thinning arrangement of the end face and the setting of the long gap, thereby ensuring Effectively dispersing or homogenizing the stress experienced by the flexible transmission member during deformation transmission, thereby increasing or extending the service life of the flexible transmission member and its harmonic reduction device.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of this creation shall be included in the scope of the appended patent application.

1‧‧‧Flexible transmission parts
10‧‧‧ Transmission body
101‧‧‧ Side waist
102‧‧‧End face
1021‧‧‧through hole
1022‧‧‧Steps
11‧‧‧ Gear Department
12‧‧‧Arc ribs
13‧‧ ‧ strip gap
131‧‧‧Expanding Department
100‧‧‧ harmonic deceleration device
2‧‧‧ internal gear
3‧‧‧harmonic unit

Figure 1 is a schematic illustration of a first embodiment of a flexible transmission member of the present invention. Fig. 2 is a schematic cross-sectional view showing a first embodiment of the flexible transmission member of the present invention. Figure 3 is a schematic illustration of a second embodiment of the flexible transmission member of the present invention. Fig. 4 is a schematic view showing the structure of the harmonic reduction device of the present invention. Fig. 5 is a schematic view showing the stress distribution in the original state of the flexible transmission member. Fig. 6 is a schematic view showing the stress distribution in the state of deformation of the flexible transmission member of the present invention.

1‧‧‧Flexible transmission parts

10‧‧‧ Transmission body

101‧‧‧ Side waist

102‧‧‧End face

1021‧‧‧through hole

1022‧‧‧Steps

11‧‧‧ Gear Department

12‧‧‧Arc ribs

Claims (10)

A flexible transmission member is applied to a harmonic reduction device, comprising: a transmission member body having a cup-like structure, the transmission member having a waist portion and an end face connected to one end of the side waist portion a gear portion disposed on the side waist portion and adjacent to the other end of the side waist portion; and a circular arc rib portion disposed in an arc shape and smoothly disposed on the side waist portion, and located at the gear portion and the Between the end faces. The flexible transmission member of claim 1, wherein the circular rib is located on the side waist of a midpoint between the gear portion and the end surface portion. The flexible transmission member according to claim 1, wherein the end surface portion has a structure which is gradually thinned toward the side waist portion and has a thickness corresponding to the side waist portion. The flexible transmission member according to claim 1, wherein the end surface portion has a stepped portion, and the step portion is disposed at a center of the end surface portion. The flexible transmission member according to claim 1, further comprising a plurality of strip gaps radially equiangularly arranged on the transmission body, and the plurality of strips are located in the portion The side surface portion and the portion of the side waist portion, and each of the strip gaps further includes a plurality of enlarged portions respectively located at two ends of the strip gap, the width of the enlarged portion being greater than the width of the strip gap, A guide angle is provided at a joint between the enlarged portion and the long strip. A harmonic reduction device comprising: an internal gear train configured to transmit power to a load; a flexible transmission member coaxially disposed within the internal gear, including a transmission a body, a gear portion and a circular arc rib, the transmission body has a cup-shaped structure, the transmission member has a waist portion and an end surface connected to one end of the side waist, the gear portion is disposed on the body a side waist portion adjacent to the other end of the side waist portion, the arc rib portion is arc-shaped and smoothly disposed on the side waist portion, and located between the gear portion and the end surface portion; and a harmonic unit, Provided inside the flexible transmission member, and configured to connect to a driving unit, the harmonic unit is an elliptical structure to deform the flexible transmission member, and the flexible transmission member The gear portion is partially meshed with the internal gear at both ends of the harmonic unit in the long axis direction. The harmonic deceleration device of claim 6, wherein the arc rib is located on the side waist of the midpoint between the gear portion and the end surface portion. The harmonic deceleration device according to claim 6, wherein the end surface portion has a structure that is gradually thinned from the center toward the side waist portion and has a thickness corresponding to the side waist portion. The harmonic deceleration device of claim 6, wherein the end face has a stepped portion, and the stepped portion is disposed at a center of the end face. The harmonic reduction device of claim 6, wherein the flexible transmission member further comprises a plurality of elongated strips, which are arranged at equal angles radially on the transmission body, and the plurality of lengths are The strip gap is located at the side waist portion of the portion and the portion of the side waist portion, and each of the strip gaps further includes a plurality of enlarged portions respectively located at two ends of the strip gap, the width of the enlarged portion being greater than the length The width of the strip is provided with a lead angle at the junction of the enlarged portion and the strip gap.