Chain guide

Abstract

The invention provides a chain guide. By employing a simple configuration, a space required for engine room can be minimized while securing enough strength, rigidity, and durability, and a reduction in a material waste, manufacturing processes, and manufacturing cost can be accomplished while occurrence of a crack or breakage during use is prevented. A chain guide (110) includes a guide shoe (110), a base member (120) configured to reinforce the guide shoe (110), and attaching sections (114). The base member (120) is formed by a bar made of a metal material.

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 23 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, in order to improve the strength, rigidity, and durability of the base member 520, it is necessary to form it from a relatively thick metal plate by punching, which requires a relatively large processing machine and increases the processing cost. The problem

[0015] In addition, there is a problem that when the base member 520 is punched out from the metal plate, burrs remain on the cut surface, and the burrs contact the guide block 510 to generate minute scratches, which become stress concentration points and cause damage. opportunity

[0016] In addition, since the base member 520 is formed by bending two integral metal plates by 90° to form the guide shoe support portion 521 and the two mounting portions 522, two bending processes are required, and there is a problem that the manufacturing man-hours increase.

[0017] In addition, since the guide block supporting portion 521 and the two mounting portions 522 are constituted by an integral metal plate, a large amount of metal material is required, and since a protrusion is formed when it is manufactured by punching or the like from a single metal plate, Because of the contour shape with many parts, there is a problem that material waste also increases

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