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Sintered gear wheel

A technology of driven gears and clutches, which is applied to belts/chains/gears, elements with teeth, portable lifting devices, etc., which can solve the problems of increased manufacturing costs, difficulty in maintaining high dimensional accuracy, etc., and achieve increased strength, Low cost and the effect of preventing impact sound

Inactive Publication Date: 2005-04-06
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The powder compression molding sintering method can usually ensure high dimensional accuracy, but when the molding die is divided, steps are formed at the joints of the split molds, which makes it difficult to maintain high dimensional accuracy
[0006] In addition, corrections such as sizing (repressurization) are required, which increases manufacturing costs.

Method used

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  • Sintered gear wheel
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Examples

Experimental program
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Embodiment Construction

[0025] Below, refer to Figures 1 to Figure 7 An embodiment of the present invention will be described.

[0026] The sintered gear of this embodiment is used as the first-stage driven gear 30 of the clutch part of the two-wheeled motor vehicle. The cross-sectional view of the internal combustion engine and power transmission system of the two-wheeled motor vehicle is shown in FIG. 1.

[0027] The internal combustion engine 1 is a 1-cylinder 2-stroke engine. The connecting rod 4 converts the reciprocating motion of the piston 3 in the cylinder 2 into the rotational motion of the crankshaft 5. An AC generator 6 is provided at one end of the crankshaft 5, and the other end is embedded with the first-stage drive Gear 7.

[0028] The main shaft 8 and the counter shaft 9 are arranged in parallel with the crankshaft 5. The transmission gear set 10 that selectively meshes with each other is sandwiched between the two shafts 8, 9 for power transmission. The sprocket 11 is embedded at the e...

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PUM

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Abstract

The invntion provides a sintered gear, in which the tooth part has particularly high strength and the high dimensional precision at a prescribed position can be obtd. in a few processes at low cost. In the sintered gear, in which the tooth part 30C formed at the outer periphery, the outer peripheral part 32 near the tooth part and the inner peripheral part 33 on the inside thereof are compacted with different forming dies and, thereafter, the sintering treatment is executed, a step part 31 at the boundary caused by the raised core of each of the forming dies of the outer peripheral part 32 and the inner peripheral part 33, is formed near the tooth part.

Description

Technical field [0001] The invention relates to a sintered first-stage driven gear which is formed by pressing metal powder into a sintering process. Background technique [0002] In gears, the parts of gears that transmit power through meshing are required to have high strength. Therefore, the method of manufacturing gears disclosed in Japanese Patent Application Laid-Open Hei 1-67370 is to use high-strength materials such as carbon steel to include the teeth. The outer circumference of the aluminum alloy is used to form the inner circumference of a material with a small specific gravity, and the two are solid-phase joined by crimping or welding to reduce weight. [0003] However, the gear manufacturing method disclosed in the gazette has many manufacturing steps and high manufacturing costs. [0004] The difference from the above-mentioned publication is a method of forming by metal powder press molding and then sintering. In this method, the forming die is divided, and the out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/06B22F5/08
Inventor 铃木诚
Owner HONDA MOTOR CO LTD