Bearing element having a roller rotatably mounted therein, in particular in the drive of a pump piston of a high-pressure fuel pump

A rotary ground, pump-piston technology, used in fuel injection pumps, engine components, components with teeth, etc., can solve the problems of fuel high-pressure pump failure, bearing component roller wear and other problems, and achieve the effect of small wear

Active Publication Date: 2013-06-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to wear of the bearing elements and / or the rollers, so that in unfavorable situations the rollers no longer rotate in the recesses and this leads to failure of the high-pressure fuel pump

Method used

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  • Bearing element having a roller rotatably mounted therein, in particular in the drive of a pump piston of a high-pressure fuel pump
  • Bearing element having a roller rotatably mounted therein, in particular in the drive of a pump piston of a high-pressure fuel pump
  • Bearing element having a roller rotatably mounted therein, in particular in the drive of a pump piston of a high-pressure fuel pump

Examples

Experimental program
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Effect test

Embodiment Construction

[0011] exist figure 1 shows a pump, which is in particular a high-pressure fuel pump for a fuel injection system of an internal combustion engine. The pump has a housing 10 which can be constructed in multiple parts and in which a rotatably driven drive shaft 14 is mounted rotatably about an axis of rotation 15 . The drive shaft 14 has at least one cam 16 , which can also be multiple cams. The pump has at least one or more pump elements 18 , each having a pump piston 20 , which is at least indirectly moved in a reciprocating linear motion by means of a cam 16 of the drive shaft 14 at least approximately radially with respect to the axis of rotation 15 of the drive shaft 14 . driven in the direction. It can also be provided that the pump does not have its own drive shaft 14 and that the pump piston 20 of the pump element 18 is driven via the shaft of the internal combustion engine with the cam 16 or the eccentric.

[0012] The pump piston 20 is tightly guided in a cylinder b...

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Abstract

The invention relates to a bearing element having a roller rotatably mounted therein, in particular in a drive of a pump piston of a high-pressure fuel pump, wherein the bearing element (44) comprises a concavely curved recess (48) in which the at least approximately circular cylindrical roller (50) is rotatably mounted. The recess (48) is curved at least in a central area (148) at least approximately as a circular segment in cross section perpendicular to the axis of rotation (51) of the roller (50), and the radius (R) thereof is equal to or only slightly greater than the radius (r) of the roller (50). The recess (48) extends over an angle range of more than 180 DEG around the circumference of the roller (50). The central area (148) of the recess (48) extends over an angle range of no greater than about 180 DEG about the circumference of the roller (50) and the recess (48) comprises edge areas (248, 348) adjacent to the central area (148) in the circumferential direction, in which the recess (48) runs, having a greater radial distance from the roller (50) than in the central area (148).

Description

technical field [0001] The invention relates to a bearing element according to the preamble of claim 1 , in particular in a drive for a pump piston of a high-pressure fuel pump, with rollers mounted rotatably therein. Background technique [0002] Such a bearing element is known from DE 2004 002 487 A1. The bearing element is arranged in the drive of the pump piston of the high-pressure fuel pump. The bearing element has a concavely curved recess in which an at least approximately cylindrical roller is rotatably mounted. Seen in a cross section perpendicular to the axis of rotation of the roller, the recess surrounds the roller over an angle of more than 180°. The recess has an at least approximately circularly curved central region in which the radius of the recess is equal to or only slightly greater than the radius of the roller and in which region the roller is thus guided with a small play. In known bearing elements, the central region of the recess with a tight guid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M59/02F02M59/10F02M59/44F01L1/14F02M63/00
CPCF01L1/143F01L2305/00F01L2305/02F02M59/02F02M59/102F02M59/44F02M2200/02F02M2200/03F16H53/06
Inventor F·伯金A·杜特
Owner ROBERT BOSCH GMBH
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