Gear device and manufacturing method for gear device

A technology of a gear device and a manufacturing method, which is applied to a gear transmission device, a hoisting device, a transmission device, etc., can solve the problems such as the decline of the rotation accuracy, and achieve the effect of suppressing the decline of the rotation accuracy.

Pending Publication Date: 2020-10-20
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If one of the external gear and the internal gear is made of resin to reduce the weight of the gear unit, the gap between the gears will decrease when the gear unit is used due to the difference in the linear expansion coefficient between the metal and the resin. Wider, will cause the rotation accuracy to decrease

Method used

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  • Gear device and manufacturing method for gear device
  • Gear device and manufacturing method for gear device
  • Gear device and manufacturing method for gear device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0023] First, the overall configuration of the gear device 100 according to the first embodiment will be described. figure 1 It is a side sectional view showing the gear device 100 of the first embodiment. The gear device 100 is a flexural engagement type gear device that flexibly deforms the external gear 14 meshing with the internal gears 18 -A, 18 -B and rotates the external gear 14 to output its rotation component. The gear device of the present embodiment is a so-called cylindrical flexural meshing gear device that decelerates the rotation of the vibrating body 12 by using the deceleration internal gear 18-A and the output internal gear 18-B to output the output.

[0024] The gear device 100 mainly includes: a vibrating body 12; an external gear 14; vibrating body bearings 16-A, 16-B; internal gears 18-A, 18-B; supporting components 20; and bearing housings 22-A, 22 -B. Hereinafter, the direction along the rotation centerline of the vibrating body 12 may be simply refer...

no. 2 Embodiment approach

[0060] Next, a gear device 100 according to a second embodiment of the present invention will be described. In the drawings and description of the second embodiment, the same or equivalent components and components as those of the first embodiment are given the same reference numerals. Descriptions of overlapping contents with those of the first embodiment are appropriately omitted.

[0061] The gear device 100 of the present embodiment includes an internal gear 18 and an external gear 14 meshing with the internal gear 18, wherein the internal gear 18 is made of resin, and the external gear 14 is made of a material having a coefficient of linear expansion smaller than that of the resin. , and the PCD of the external gear 14 in the state where the temperature of the gear device 100 is 20°C is set to be larger than the PCD of the internal gear 18 so that when the temperature of the gear device 100 is in the range of 40°C to 50°C The idle time is not less than 0 min and not more...

no. 3 Embodiment approach

[0066] Next, the manufacturing method S200 of the gear device according to the third embodiment of the present invention will be described. In the drawings and description of the third embodiment, the same or equivalent components and components as those of the first embodiment are given the same reference numerals. Descriptions of overlapping contents with those of the first embodiment are appropriately omitted. The manufacturing method S200 of the present embodiment is a method of manufacturing the aforementioned gear device 100 , and includes an embedding step of embedding the external gear 14 into the internal gear 18 in an interference fit manner.

[0067] According to this aspect, since the external gear 14 is fitted into the internal gear 18 with an interference fit, even if thermal expansion occurs during use, the lost motion can be suppressed to be small.

[0068] In the above-mentioned embedding step, the internal gear 18 may be heated and then embedding may be perf...

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PUM

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Abstract

The purpose of the present invention is to provide a gear device capable of suppressing a decrease in rotational accuracy while achieving a reduction in weight. This gear device (100) is provided withan internal gear (18) and an external gear (14) that meshes with the internal gear (18). The internal gear (18) is made of resin. The external gear (14) is made of a material having a linear expansion coefficient smaller than that of the resin. Before the gear device is used, the PCD of the internal gear (18) and the PCD of the external gear (14) are set such that the idle stroke is 0-15 min based on the difference in the amount of thermal expansion between the internal gear (18) and the external gear (14) when the gear device is used.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2019-074120 filed on April 9, 2019. The entire contents of this Japanese application are incorporated herein by reference. technical field [0002] The invention relates to a gear device and a manufacturing method of the gear device. Background technique [0003] A gear unit having an external gear and an internal gear is known. The present applicant discloses in Patent Document 1 a gear device that prevents gears from heating. This gear unit is a flexurally meshed gear unit having an external gear that deforms flexibly and an internal gear that meshes with the external gear, wherein one of the external gear and the internal gear is made of resin, and the other gear is made of thermal conductivity Made of high thermal conductivity material with higher thermal conductivity than resin. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2018-155313 [0005] If one of the external gear an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/32F16H55/06
CPCF16H1/32F16H55/06F16H2055/176F16H2055/065F16H49/001F16H2049/003F16H2057/02073F16H57/023F16H1/10
Inventor 田村光扩
Owner SUMITOMO HEAVY IND LTD
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