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Shock absorbing structure in idler

A shock buffer and idler technology, applied in the field of shock buffer structure, can solve the problems of increased collision energy, inability to maintain performance for a long time, weakening, etc., and achieve the effect of reducing consumption

Inactive Publication Date: 2009-06-03
TSUBAKIMOTO CHAIN CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if the standard sprockets specified in the above-mentioned JIS B1801-1997 are used in the roller chain transmission mechanism, when the rollers of the roller chain mesh with the teeth of the standard sprocket, there is no part that becomes a buffer member, so Increases the collision energy between the rollers of the roller chain and the teeth of the standard sprocket, which will cause noise and vibration
[0008] In addition, the low-noise sprocket disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-119508 uses an elastic buffer made of hydrogenated nitrile rubber, fluororubber, or polyurethane-based rubber as a means for reducing the impact noise of the chain rollers, thereby reducing the impact noise of the chain rollers. There is a problem that the above-mentioned elastic buffer body is worn out or its elasticity is weakened, so its performance cannot be maintained for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 of the present invention is an example of an idler gear applicable to a transmission mechanism of a timing roller chain of an engine, so based on Figure 1~3 Example 1 of the present invention will be described.

[0031] figure 1 It is a sectional view of the main part of the shock absorbing structure of the idler of Example 1. figure 2 yes figure 1 A-A sectional view in middle shows the state where the fuel injection hole and the fuel supply hole are aligned. image 3 yes figure 1 A-A sectional view in the middle shows the state where the injection hole and the oil supply hole are misaligned.

[0032] The shock absorbing structure of the idler 1 according to Example 1 of the present invention is configured as follows.

[0033] Idler 1 is constructed as figure 1 Said includes: the support shaft 2 that is fixed on the engine body (fixed body) 9; the idler sprocket 3 of the standard tooth shape that is rotatably supported on the support shaft 2; and th...

Embodiment 2

[0066] based on Figure 4 Example 2 of the present invention will be described. Figure 4 It shows the shock absorbing structure of the idler 1' of Example 2 and corresponds to figure 2 The cross-sectional view of shows the state where the fuel injection hole is aligned with the fuel supply hole.

[0067] Although the impact-absorbing structure of the idler 1' of the embodiment 2 is different from the impact-absorbing structure of the idler 1 of the above-mentioned embodiment 1 in the following two points, other structures are the same as the above-mentioned embodiment 1, so only the above-mentioned structure will be described below. Differences, descriptions of other structures are omitted.

[0068] The first difference is that Figure 4 The point where the slide bearing 6 used in the above-described Embodiment 1 is not used is shown.

[0069] Therefore, in Embodiment 2, the standard-toothed idler sprocket 3' is directly and rotatably fitted and supported on the cylindri...

Embodiment 3

[0074] based on Figure 5 Embodiment 3 of the present invention will be described. Figure 5 It shows the shock absorbing structure of the idler 1" of Example 3 and corresponds to figure 2 The cross-sectional view of shows the state where the fuel injection hole is aligned with the fuel supply hole.

[0075] Although the impact-absorbing structure of the idler 1" of the embodiment 3 is different from the impact-absorbing structure of the idler 1 of the above-mentioned embodiment 1 in the following two points, other structures are the same as the above-mentioned embodiment 1, so only the above-mentioned structure will be described below. Differences, descriptions of other structures are omitted.

[0076] The first difference is that Figure 5 The slide bearing 6 used in Embodiment 1 above is shown without use.

[0077] Therefore, in Embodiment 3, the standard-toothed idler sprocket 3 ″ is directly and rotatably fitted and supported on the cylindrical portion 2 a of the sup...

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Abstract

A shock absorbing structure in an idler in which the shock of first abutment of a roller in a roller chain in a case where the roller engages with an idler sprocket, is absorbed or reduced The structure has an idler 1 and a supporting shaft 2 fixed to a fixed body 9. The shaft has one oil supply hole 2c extending in a substantially radial direction from a central reservoir 10 to the outer circumference of the shaft. The supporting shaft 2 is positioned such that the oil supply hole 2c extends toward a position where a roller 5 first abuts when the roller 5 engages with a standard tooth form idler sprocket 3. The idler sprocket 3 is provided with a plurality of oil injection holes extending in a substantially radial direction, each of which terminates in an outlet in one of the tooth gaps 3a of the sprocket 2. The oil injection holes 3b sequentially register with the oil supply hole 2c, to inject oil into he tooth gaps. The oil is supplied by an oil pump 11 through the central reservoir 10.

Description

technical field [0001] The present invention relates to a shock absorbing structure of an idler used in a power transmission mechanism or a conveying mechanism of an automobile or an industrial machine. Background technique [0002] Conventionally, Japanese Industrial Standards (JIS) have been established regarding roller chains and sprockets used in roller chain power transmission mechanisms (see Non-Patent Document 1). [0003] Hereinafter, the sprocket and its tooth profile prescribed by the above-mentioned JIS are referred to as a standard sprocket and a standard tooth profile, respectively. [0004] As a solution to reduce the impact noise of the chain rollers, a low-noise sprocket is proposed. The above-mentioned low-noise sprocket is provided with a buffer body holding groove near the tooth root surface of the meshing teeth of the chain roller. The narrow opening of the dedendum, and the elastic buffer protruding from the dedendum surface is press-fitted into the hol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H7/06F16H55/30
CPCF16H57/0431F16H55/30F16H57/05
Inventor 佐仓俊儿平井晶
Owner TSUBAKIMOTO CHAIN CO