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Planetary gear device

A technology of planetary gears and internal gears, applied in gear transmissions, transmissions, belts/chains/gears, etc., can solve the problems of power transmission efficiency decline, tooth wear, slipping, etc., and achieve the effect of effective power transmission

Pending Publication Date: 2021-03-16
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, slipping occurs between the teeth of the first external gear and the first internal gear that mesh with each other and between the teeth of the second external gear and the second internal gear that mesh with each other, and there is a problem that power transmission efficiency is likely to decrease.
Moreover, there is also the problem that the slipping of the teeth easily leads to the wear of the teeth

Method used

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  • Planetary gear device
  • Planetary gear device
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] figure 1 It is a sectional view showing the planetary gear device according to Embodiment 1 of the present invention. figure 1 express figure 2 The A-A line section. figure 2 is viewed from the axial figure 1 A diagram of the planetary gear unit 1. image 3 yes figure 1 A cross-sectional view of the planetary gear unit taken along line B-B. Figure 4 yes figure 1 A cross-sectional view of the planetary gear unit taken along line C-C. Figure 5 yes figure 1 A cross-sectional view of the planetary gear unit taken along the line D-D. Image 6 It is a perspective view showing a combination of a first external gear, a rotating body of the first internal gear, a second external gear, and a rotating body of the second internal gear. Image 6 shows a simplified structure by reducing the number of teeth of each gear. in addition, figure 2 It also corresponds to a diagram when planetary gear devices 1A to 1H according to Embodiment 2 to Embodiment 9 are viewed from ...

Embodiment approach 2

[0091] Figure 7 It is a sectional view showing the planetary gear device 1A according to Embodiment 2 of the present invention. Figure 7 express figure 2 The A-A line section.

[0092] The main difference between the planetary gear device 1A of the second embodiment and the planetary gear device 1 of the first embodiment is that the second support portion 51b, the second support member 35, and the auxiliary pin 39 are removed, and the other components are the same as those of the first embodiment. same. In addition, the same code|symbol as Embodiment 1 is attached|subjected to the same component, and detailed description is abbreviate|omitted.

[0093] In Embodiment 2, the support pin 21A is cantilever-supported by the first support portion 51 a , and the support pin 31A is cantilever-supported by the first support member 34 . Since the support pins 21A, 31A are supported by cantilever, their axial dimensions are correspondingly shorter than those of the support pins 21...

Embodiment approach 3

[0098] Figure 8 It is a sectional view showing the planetary gear device 1B according to Embodiment 3 of the present invention. Figure 8 express figure 2 The A-A line section.

[0099] The planetary gear device 1B according to the third embodiment differs from the first embodiment mainly in the support structure of the support pin 31B and the structure of the main bearing 46B. In addition, the same code|symbol as Embodiment 1 is attached|subjected to the same component, and detailed description is abbreviate|omitted.

[0100] The second internal gear 30B according to Embodiment 3 includes a plurality of support pins 31B, a plurality of rotating bodies 32 , a first support member 34B supporting one end side of the plurality of support pins 31B in the axial direction, and a shaft supporting the plurality of support pins 31B. The second support member 35 on the other end side upward.

[0101] The plurality of support pins 31B and the first support member 34B are integrally...

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Abstract

The present invention provides a planetary gear device wherein power transmission is carried out efficiently. This planetary gear device (1) is provided with: a first internally toothed gear (20) anda second internally toothed gear (30); a first externally toothed gear (13a) which engages with the first internally toothed gear (20); a second externally toothed gear (13b) which engages with the second internally toothed gear (30); and an eccentric body (10A) which is orbited by the first externally toothed gear (13a) and the second externally toothed gear (13b). The first externally toothed gear (13a) and the second externally toothed gear (13b) rotate integrally with each other; the first internally toothed gear (20) and the second internally toothed gear (30) respectively have supportingbodies (51a, 51b, 21, 34, 35, 31, 39) and a plurality of inner teeth (21, 22, 31, 32); and each one of the plurality of inner teeth (21, 22, 31, 32) comprises a rotor (22, 32) which is supported by asupporting body in a rotatable manner.

Description

technical field [0001] The present invention relates to a planetary gear device. Background technique [0002] In Patent Document 1 figure 1 discloses a planetary gear device including a first external gear and a second external gear orbitingly moved by an eccentric body provided on an input shaft, and a first internal gear and a second internal gear respectively meshing with them. The first external gear and the second external gear are planetary gears that are connected to rotate integrally, the first internal gear is fixed to the housing, and the second internal gear is connected to the output shaft. [0003] According to the above configuration, the rotational motion input to the input shaft is decelerated by the gear mechanism composed of the first external gear and the first internal gear and the gear mechanism composed of the second external gear and the second internal gear, and the decelerated rotational motion is transmitted to the Output shaft. [0004] Previou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/32
CPCF16H1/32B25J9/102
Inventor 石田悠朗石塚正幸南云稔也
Owner SUMITOMO HEAVY IND LTD