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Lifter Roller Retention Solution

A technology of rollers and components, applied in piston pumps, liquid variable displacement machines, machines/engines, etc., can solve the problem of high manufacturing costs of roller components

Active Publication Date: 2020-08-28
CUMMINS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall manufacturing cost of the roller assembly is high due to the complex dimensional requirements of the various parts of the roller assembly (e.g., groove shape, relative shape of the roller, and peripheral shape of the roller guide shoe)

Method used

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  • Lifter Roller Retention Solution
  • Lifter Roller Retention Solution
  • Lifter Roller Retention Solution

Examples

Experimental program
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Embodiment Construction

[0016] To promote an understanding of the principles of this disclosure, reference will now be made to the embodiments illustrated in the drawings and described below. It is to be understood, however, that no limitation of the disclosure is intended thereby. The disclosure includes any adaptations and further modifications in the apparatus shown and methods described and further applications of the principles of the disclosure which would normally occur to a person skilled in the art to which the disclosure pertains. Moreover, these embodiments were chosen to be described in order to enable those skilled in the art to practice the disclosure.

[0017] refer to figure 1 , high pressure fuel pump 100 is depicted having pump housing 102 , roller assembly 104 , bore 106 , plunger 108 , cam 110 and lifter body 112 . The pump housing 102 defines a bore 106 within which a plunger 108 is mounted for reciprocating movement through compression and retraction strokes under the influenc...

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Abstract

A roller assembly comprising: a roller shoe having a bottom surface and a groove at the bottom surface, the groove having a semicircular portion and extending from the semicircular portion a straight portion of a semicircular portion having a first diameter and a first width; and a cylindrical roller positioned in a groove of said roller shoe having a second diameter wherein said The first width is greater than or equal to the first diameter, and the second diameter is smaller than the first width.

Description

technical field [0001] The present disclosure relates generally to high pressure fuel pumps for supplying fuel to internal combustion engines, and more particularly to high pressure fuel pumps with roller assemblies that are less expensive to manufacture. Background technique [0002] Generally, the roller assembly cooperates with a cam through which the high pressure fuel pump is mechanically driven. In conventional high-pressure fuel pumps, the roller housing has a substantially circular arc-shaped groove for holding the roller. The overall manufacturing cost of the roller assembly is relatively high due to the complex dimensional requirements of the various parts of the roller assembly (eg, groove shape, relative shape of the roller, and peripheral shape of the roller guide shoe). Thus, there is a need in the art for a roller assembly for converting rotational motion to reciprocating motion that reduces overall manufacturing costs. Contents of the invention [0003] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/10
CPCF02M2200/8061F02M59/102F04B1/0426F04B1/0439F16H53/06F02M59/44F04B9/042F04B9/04
Inventor C-P·王M·B·斯泰特E·A·贝纳姆J·G·温格A·列辛K·J·布鲁尔
Owner CUMMINS INC