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Oscillating internally meshing planetary gear system and method for manufacturing eccentric body shaft

A technology of planetary gears and eccentric bodies, which is applied to gear transmissions, transmissions, transmission parts, etc., can solve the problems of variable length and increased number of parts, and achieve the effect of short axial direction, small number of parts and high capacity

Active Publication Date: 2008-08-27
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, since the eccentric body shaft is supported by the needle bearings in the internal meshing planetary gear unit with such a structure, although it is true (compared with the tapered roller bearings used in Patent Document 1, for example) radial savings can be achieved. The effect of space and high capacity, but there is a disadvantage that ball bearings are used in addition to the axial positioning of the needle bearings, the number of parts increases, and the entire device becomes longer in the axial direction

Method used

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  • Oscillating internally meshing planetary gear system and method for manufacturing eccentric body shaft
  • Oscillating internally meshing planetary gear system and method for manufacturing eccentric body shaft
  • Oscillating internally meshing planetary gear system and method for manufacturing eccentric body shaft

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Embodiment Construction

[0021] Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

[0022] The oscillating internal meshing planetary gear unit 112 has: an internal gear 128; an external gear 124 internally meshing with the internal gear 128 while oscillating; an eccentric body 122 for causing the external gear 124 to perform the above-mentioned oscillating rotation; The eccentric body shaft 120 ; and a pair of first and second brackets 132 , 134 arranged on both axial sides of the external gear 124 to rotatably support the eccentric body shaft 120 .

[0023] Hereinafter, a more detailed description will be given.

[0024] The input shaft 114 may be connected to an output shaft of an unillustrated motor. A sun gear 116 is integrally formed at the front end of the input shaft 114 . The sun gear 116 meshes simultaneously with a plurality (three in this example) of transfer gears 118 .

[0025] Each transmission gear 118 is as...

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Abstract

The present invention provides an oscillating internally meshing planetary gear system which has the configuration of rotating external gears inside an internal gear oscillatingly through the intermediary of eccentric bodies so that a relative rotation between the internal gear and the external gears is taken out through a pair of first and second carriers arranged on both axial sides of the external gears. In this configuration, eccentric body shafts are supported by the first and second carriers through needles. Thrust receiving means for restricting axial movement of the eccentric body shafts are arranged between step portions formed on the eccentric body shafts and the first and second carriers.

Description

technical field [0001] The invention relates to an oscillating internal meshing planetary gear device. Background technique [0002] For example, Patent Document 1 discloses a oscillating internal meshing planetary gear device, which is configured to swing and rotate an external gear via an eccentric body inside the internal gear, thereby passing through one of the external gears arranged on both axial sides of the external gear. On the bracket, while taking out the relative rotation of the internal gear and external gear. Also, the same applicant proposed a structure in which the structure of Patent Document 1 was improved. Fig. 2 and Fig. 3 show the improved oscillating internal meshing planetary gear device. [0003] In this oscillating internal meshing planetary gear unit 12 , a sun gear 16 is formed on an input shaft 14 . The sun gear 16 meshes with a plurality (three in this example) of transmission gears 18 at the same time. [0004] The transmission gears 18 are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/28F16H57/00B24B5/36F16H1/32
CPCY10T29/49286F16H1/32F16H57/023F16H57/02
Inventor 鹤身洋芳贺卓石川哲三
Owner SUMITOMO HEAVY IND LTD