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flex mesh gearing

A technology of gear device and external gear, applied in the direction of gear transmission device, transmission device, belt/chain/gear, etc., can solve the problem of reducing the meshing number of the internal gear and the external gear, increase the load torque and suppress the deflection Stress, the effect of improving the transmission torque

Active Publication Date: 2011-12-21
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, there is a problem that the meshing number of the internal gear and the external gear decreases.

Method used

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Examples

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Embodiment Construction

[0022] Hereinafter, an example of the first embodiment of the present invention will be described in detail with reference to the drawings.

[0023] First, the main use Figure 1 to Figure 4 The overall structure of this embodiment will be briefly described.

[0024] The flexural meshing gear unit 100 includes: a rigid internal gear (internal gear) 130A for deceleration; an external gear 120A capable of internally meshing with the internal gear 130A for deceleration and having flexibility; The outer circumference of the external gear 120A is flexurally deformed to achieve internal meshing between the decelerating internal gear 130A and the external gear 120A. Here, if Figure 4 As shown, the outer peripheral shape of the vibrating body 104 (the outer peripheral shape in the cross section perpendicular to the axial direction O) is three arc portions with different curvature radii r1, r2, r3 (the first arc portion FA, the second arc portion The shape in which the arc portion ...

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Abstract

The invention provides a flexural engage type gear device, which inhibits flexural strain caused by external gear deformation to avoid the gear shape interference between the inner gear and the external gear caused by the external gear deformation, thereby the load torsion is realized to be increased. The flexural engage type gear device (100) provided in the utility model possesses an inner gear (130A), an external gear (120A) and an oscillation starting body (104), wherein the periphery of the oscillation starting body (104) includes an arc-shaped first arc portion (FA) which connects the inner gear (130A) for deceleration with the external (120A) to be in an engagement state, a second arc portion (SA) with curvature radius (r2) smaller than the first arc portion (FA), a third arc portion (TA) with the curvature radius (r3) larger than the first arc portion (FA), enabling the inner gear (130A) and the external gear (120A) be in a non-engagement state. The connection portions of the first arc portion (FA), the second arc portion (SA) and the third arc portion (TA) are respectively share the tangents (T1, T2) of the first arc portion (FA), the second arc portion (SA) and the third arc portion (TA).

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2010-139888 filed on June 18, 2010. All the content of the application is used in this specification by reference. [0002] The present invention relates to a flexural meshing gear unit. Background technique [0003] The flexural meshing gear device of Patent Document 1 includes: a rigid internal gear; an external gear capable of internally meshing with the internal gear and having flexibility; To realize the internal meshing of the internal gear and the external gear. Furthermore, in Patent Document 1, the outer peripheral shape of the vibrating body that flexibly deforms the external gear is a shape connecting two circular arcs with different radii of curvature. In addition, in the vibrating body, a tangent line is shared at the connecting portion of the two arcs. Therefore, in Patent Document 1, it is possible to minimize changes in the radius of curvature of the external ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/20
CPCF16H2001/324F16H1/32
Inventor 吉田真司安藤学田中史人芝正明
Owner SUMITOMO HEAVY IND LTD
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