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Idler wheel with drum inner bore

A technology of rollers and inner holes, applied in the direction of elements with teeth, belts/chains/gears, portable lifting devices, etc., can solve the problems that the economic benefits of the rollers are not very high, the wear and tear of the rollers, etc., to reduce edge stress and wear. , the effect of reducing wear

Inactive Publication Date: 2010-06-09
WUXI XIZHOU MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the tappet parts used in the past, the roller and the roller pin have an interference fit, so that the lubricating oil cannot fully enter between them for lubrication, so that the roller is particularly worn when the fuel injection pump is working, resulting in the economic benefit of the roller. very high

Method used

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  • Idler wheel with drum inner bore
  • Idler wheel with drum inner bore
  • Idler wheel with drum inner bore

Examples

Experimental program
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Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0012] Such as Figure 1 ~ Figure 3 Shown: the present invention comprises a tappet body 1, a roller pin 2, a roller body 3, a groove pin 4, a positioning groove 5, a push rod groove 6 and an inner hole 7.

[0013] Such as figure 2 and image 3 Shown: the present invention is used in the fuel injection pump of automobile engine. The surface of the inner hole 7 of the roller body 3 is drum-shaped, and the outer surface of the roller body 3 is also drum-shaped.

[0014] Such as figure 1 Shown: including the roller body 3, it is characterized in that: there is an inner hole 7 in the roller body 3, the longitudinal section of the inner wall of the inner hole 7 is arc-shaped, and the middle part of the inner wall protrudes toward the center line of the inner hole 7, The inner diameter of the middle part of the inner hole 7 is smaller than the inner diameter of...

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Abstract

The invention relates to an idler wheel, in particular to an idler wheel with a drum inner bore, and belongs to the technical field of mechanical structure. According to the technical scheme provided in the invention, the idler wheel with a drum inner bore comprises an idler wheel main body, wherein the inner bore is arranged in the idler wheel main body, the vertical section of the inner wall of the inner bore is arched, and the middle of the inner wall is protruded towards the central line of the inner bore so that the inner diameter of the middle of the inner bore is smaller than the inner diameter of the end of the inner bore. The inner surface of the idler wheel in the invention is drum-shaped so as to reduce the boundary stress of the idler wheel and abrasion. The idler wheel and the idler wheel pin use clearance fit so that the lubricating oil can further enter the space between the idler wheel and the idler wheel pin adequately for carrying out lubrication, so as to reduce the abrasion between the idler wheel and the idler wheel pin and prolong the service life of the idler wheel and the idler wheel pin.

Description

technical field [0001] The invention relates to a roller, in particular to a roller with a drum-shaped inner hole, and belongs to the technical field of mechanical structures. Background technique [0002] In the fuel injection pump, the roller plays the role of converting the rotation of the cam into the movement of the plunger to complete the operation of the pump. It is one of its important parts and one of its easy-to-wear parts. When the drum-shaped roller is used instead of the cylindrical roller, although the contact stress between the roller and the cam is reduced, due to the continuous increase of the pressure at the pump end, the contact stress between the roller and the cam also increases accordingly, so that the inner hole of the cylindrical roller and the roller The contact stress of the pin also increases accordingly. The increase of stress aggravates the wear between the roller and the roller pin, reducing the service life of the roller and the roller pin. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/32
Inventor 包建忠
Owner WUXI XIZHOU MACHINERY
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