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Flexible meshing type gear device

A gearing and meshing technology, applied in gear transmissions, transmissions, belts/chains/gears, etc., to improve the spring constant and suppress excessive wear

Pending Publication Date: 2021-08-06
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the flexural meshing gear device of Patent Document 1, although the effect of suppressing excessive wear of the teeth can be obtained, there is still room for improvement from the viewpoint of the spring constant.

Method used

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  • Flexible meshing type gear device
  • Flexible meshing type gear device
  • Flexible meshing type gear device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0061] figure 1 It is a sectional view showing the flexural meshing gear device 100 according to the first embodiment. The flexural meshing gear unit 100 decelerates the input rotation and outputs it. The flexural meshing gear device 100 is a so-called flat flexural meshing gear device, and includes a wave generator 2, an external gear 4 flexibly deformed by the wave generator 2, and a first internal gear meshing with the external gear 4. 6. The second internal gear 8 arranged (adjacent) to the first internal gear 6 in the axial direction and meshed with the external gear 4, the housing 10, the first limiting member 12, the second limiting member 14, the main bearing 16, The first bearing housing 18 and the second bearing housing 20 . A lubricant (for example, grease) is enclosed in the flexural meshing gear unit 100 . The lubricant lubricates the meshing portion of the external gear 4 and the first internal gear 6 , the meshing portion of the external gear 4 and the second...

no. 2 Embodiment approach

[0138] Figure 6 It is a figure for demonstrating the tooth line shape of the external gear, the 1st internal gear, and the 2nd internal gear of 2nd Embodiment. In the second embodiment, the shapes of the first external tooth portion 4a, the second external tooth portion 4b, the first internal tooth portion 6a, and the second internal tooth portion 8a are different from those of the first embodiment, while the other requirements are the same as those of the first embodiment. The implementation is the same. exist Figure 6 Among them, the center plane P0, the plane P1, the plane P2, and the tooth thickness center plane S4 are as described in the first embodiment.

[0139] The first internal tooth portion 6a has: a first maximum tooth thickness portion 6a7, the tooth thickness of which is the largest; a first inner tooth thickness reduction portion 6a9, which extends from the first maximum tooth thickness portion 6a7 toward the axial inner The tooth thickness decreases inward; ...

no. 3 Embodiment approach

[0157] Figure 7 It is a figure for demonstrating the tooth line shape of the external gear, the 1st internal gear, and the 2nd internal gear of 3rd Embodiment. In the third embodiment, the shape of the first external tooth portion 4a and the first internal tooth portion 6a is the same as that of the first embodiment, and the shape of the second external tooth portion 4b and the second internal tooth portion 8a is the same as that of the second embodiment. same.

[0158] The axial length of the second tooth thickness linear portion 8as is longer than the axial length of the first tooth thickness linear portion 4as. The axial length of the first tooth thickness linear portion 4as may be substantially zero. In the cylindrical cross section, the tooth surface of the second external tooth portion 4b and the tooth surface of the first internal tooth portion 6a may be inclined from the axial direction.

[0159] Such as Figure 7 As shown, in the third embodiment, if focusing on ...

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Abstract

The invention provides a flexible meshing type gear device capable of suppressing excessive wear of teeth and improving a spring constant. The flexible meshing type gear device is provided with: an oscillation starting body; an external gear which is deflected and deformed by the oscillator; a first internal gear engaged with the external gear; and a second internal gear disposed side by side with the first internal gear in the axial direction and engaged with the external gear. A minimum tooth thickness portion (4k9) where an extension portion of the first inner side tooth thickness reduction portion (4a9) and an extension portion of the second inner side tooth thickness reduction portion (4b9) intersect is present at a position offset from the center of a gap (7) between the first internal gear and the second internal gear. The axial length of the second tooth thickness straight line portion (4bs) is different from the axial length of the first tooth thickness straight line portion (4as).

Description

[0001] This application claims priority based on Japanese Patent Application No. 2020-016696 filed on February 4, 2020. The entire content of this Japanese application is incorporated in this specification by reference. technical field [0002] The present invention relates to a flexural meshing gear unit. Background technique [0003] There is known a so-called flat-type flexurally meshing gear device, which has: an oscillating body; an external gear that is deflected and deformed by the oscillating body; a first internal gear that meshes with the external gear; a second internal gear that meshes with the external gear; The first internal gears are arranged side by side in the axial direction and mesh with the external gears. [0004] Patent Document 1 discloses a technique for suppressing excessive tooth wear in a flat flexural meshing gear device by carefully designing the shape of the tooth line of the external gear, the first internal gear, or the second internal gear....

Claims

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Application Information

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IPC IPC(8): F16H1/32F16H49/00
CPCF16H1/32F16H49/001F16H55/0833F16H2001/327F16H2055/176
Inventor 吉田真司
Owner SUMITOMO HEAVY IND LTD