Chain guide

Abstract

There is provided a chain guide that reduces a space occupied by the chain guide in an engine room while maintaining required strength, rigidity, and durability with a simple configuration, reduces the number of manufacturing steps and the waste of a material, does not require a structure that permits an error, prevents increases in vibration and noise during use, and reduces the burden of a maintenance operation. The chain guide has a guide shoe and a base member that reinforces the guide shoe, and an attachment portion includes an attachment member that is provided separately from the guide shoe and the base member and can be fixed to at least one of the guide shoe and the base member or both of the guide shoe and the base member.

Description

technical field [0001] The invention relates to a chain guide, which comprises: a guide block, which slides and guides a moving chain; a base member, which reinforces the guide block along the chain movement direction; and at least one installation part. Background technique [0002] Conventionally, in order to stabilize and properly maintain the tension of the chain moving between the sprockets, a chain guide provided with a guide block for slidingly guiding the moving chain is generally used. [0003] For example, if Figure 64 As shown, the following timing system is known, which is a transmission such as a roller chain that performs seamless rotation between the sprockets S1, S2, and S3 of the crankshaft and the camshaft respectively arranged in the engine room (engine room). The timing system of the engine in which the chain CH moves, and the timing chain CH rotates seamlessly between the driving sprocket S1 of the crankshaft installed in the engine room E and a pair of...

AI Technical Summary

Problems solved by technology

[0014] In such a known chain guide, since the base member 520 is formed by bending two integral metal plates by 90° to form the guide block support portion 521 and the two mounting portions 522, it is necessary to perform two steps on one metal plate. There is a problem of increased manufacturing man-hours for bending processing above the

[0015] In addition, since the guide block supporting portion 521 and the two mounting portions 522 are formed by an integral metal plate, a large amount of metal material is required, and the protruding portion is relatively large when manufactured from a single metal plate by punching or the like. There are many contour shapes, so there is a problem that material waste also increases

[0016] In addition, for example, even when many other factors are the same but only the positions of the mounting shafts B1 and B2 are different, it is necessary to design a base member 520 of a completely different shape. For 520, it is necessary to punch different shapes, and the position for bending processing also needs to be different. Therefore, when the design of the installation object is changed, or when it is applied to various installation objects, there is a lack of versatility and manufacturing costs. additional questions

[0017] In addition, when forming the mounting portion on the base member, the material and thickness must be the same, and it is difficult to perform an optimal design for each, and there is a problem that the material cost cannot be reduced.

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