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Chain for use in automobile engine

A technology of automobile engine and vanadium carbide layer, applied in transmission chain, metal material coating process, coating and other directions, can solve the problems of poor running-in property of chain link plate, difficult to obtain long life, reduced impact resistance, etc. Achieve the effect of reducing wear, excellent lubricity, and reducing initial wear

Active Publication Date: 2008-01-23
TSUBAKIMOTO CHAIN CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the chain for an automobile engine disclosed in Patent Document 1, the roller chain or the bush chain having a bush is the object, and even if the technique of forming a vanadium carbide layer on the surface of the pin adopted here is applied to the silent In the chain, it is also difficult to obtain the effect of the pin being less susceptible to oxidation or corrosion and extending the life when used with a lubricating oil with a high degree of oxidation that is extremely deteriorated in the engine room, which is obtained in a roller chain or a bush chain.
[0010] Furthermore, according to the pin for the silent chain disclosed in the above-mentioned Patent Document 2, the V formed on the V having excellent wear resistance is completely removed. 8 C 7 The surface layer of the layer contains more V 2 As a result of the impurity layer of C, on the one hand, the wear resistance of the pin is improved, but the running-in performance of the link plate is deteriorated, and the "shock resistance" is reduced.

Method used

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  • Chain for use in automobile engine
  • Chain for use in automobile engine
  • Chain for use in automobile engine

Examples

Experimental program
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Effect test

Embodiment 1

[0037]Fig. 1 is a perspective view showing an example of a silent chain according to the present invention. In order to clarify the internal structure of the chain, two guide link plates GLP near the center are cut away and shown. The silent chain 10 is formed in an annular shape by connecting a plurality of inner link plates ILP having two teeth 12a, 12a formed in double strands on the inner side by a pin Q. Each row of internal link plates ILP is composed of an even number and an odd number. In the silent chain 10 shown in FIG. The joint row A composed of ILP is press-fitted with the guide link plate GLP without the above-mentioned teeth 12a on both outer sides of the guide row B composed of a small number of pieces. Therefore, the guide row B having the guide link plate GLP on the outermost row and the joint row A including only the inner link plate ILP are alternately linked by the pin Q in the length direction of the chain.

[0038] In the silent chain 10 of the present ...

Embodiment 2

[0054] Based on the automobile engine chain of Example 2, on the basis of the structure of the silent chain of Example 1, the content of V was reduced by using tumbling treatment. 2 The surface roughness of the outermost layer of the pin Q of C, by reducing the surface roughness within the range where the outermost layer exists, "good lubricity" can be maintained for a long time, and the "durability" of the silent chain for automobile engines can be improved ". In order to make the surface roughness smaller in this way, by using barrel grinding, the pin as the workpiece and the abrasive rub against each other in the barrel groove, so that small parts such as pins can be efficiently ground.

[0055] From the results of the chain elongation test shown in FIG. 2, if the silent chain of Example 2, which has a smaller surface roughness, and the silent chain of the conventional example are compared after the test time of 100 hours, the chain elongation of the conventional example is...

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Abstract

To provide a chain for an automobile engine that does not cause abnormal wear and elongation even when used together with extremely deteriorated lubricating oil with a high degree of oxidation, and can bend and slide smoothly for a long period of time. In a chain for an automobile engine in which a plurality of plates are connected by pins, a vanadium carbide layer is formed on the surface of the pin by diffusion infiltration treatment, and the vanadium carbide layer on the steel side of the base material of the pin is formed of a V8C7 layer, and the carbonization of the pin The outermost side of the vanadium layer is formed by the V2C layer.

Description

technical field [0001] The present invention relates to a chain for power transmission or a chain for driving a camshaft for an automobile engine, and particularly preferably relates to a timing chain for an automobile engine. Background technique [0002] In recent years, due to the requirements of high load, high speed, improvement of layout freedom and maintenance-free, in the power transmission medium used in the camshaft drive mechanism of automobile engine, etc., it has replaced the belt which has been widely used in the past. Toothed belts or V-belts, metal roller chains or metal bush chains with excellent durability are increasingly used. [0003] Recently, the adoption of silent chains has been increasing in fields such as timing chains for automobile engines that require stricter conditions such as improved quietness, high loads, and high speeds. [0004] Generally speaking, a silent chain for an automobile engine is composed of a guide link plate, an inner link p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16G13/06C23C10/36
CPCF16G13/04
Inventor 永尾宪一
Owner TSUBAKIMOTO CHAIN CO