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High-pressure oil pump roller tappet for engine

A high-pressure oil pump and engine technology, applied in engine components, machines/engines, mechanical equipment, etc., can solve problems such as inability to optimize material use efficiency, complex production and assembly procedures, damage to cylinder blocks and guide sleeves, and effectively control the overall weight. , Improve the effect of assembly rhythm and short mechanism height

Active Publication Date: 2017-02-22
HANGZHOU XZB TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The guide sleeve of the roller tappet of the existing high-pressure oil pump is a cylindrical shell, which is made of complex cold forming. Efficiency in use; the guide sleeve and the bracket are integrally formed by forging, which causes the lateral force of the external drive cam on the bracket to be transmitted to the guide sleeve, which will not only cause the deformation of the guide sleeve, but also cause the guide sleeve to shake in the cylinder, causing the The cylinder block and the guide sleeve are damaged; in addition, the guide block used to limit the axial rotation of the roller tappet on the side of the guide sleeve is a split structure embedded in the shell, which makes the production and assembly process more complicated

Method used

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  • High-pressure oil pump roller tappet for engine
  • High-pressure oil pump roller tappet for engine
  • High-pressure oil pump roller tappet for engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Coordinated Example 1: Combination Figure 5 As shown, the structure of the annular groove 1.2 is a groove 1.2.1 formed by recessing the inner wall at the installation position on the guide sleeve 1, and the tail part 2.4 and the groove 1.2.1 form a nested interference fit.

[0053] Coordinated Example 2: Combination Figure 6 As shown, the structure of the annular groove 1.2 is a pair of convex ribs 1.2.2 in the shape of an open trumpet formed by punching inwards from the upper and lower side walls at the installation position on the guide sleeve 1, and the tail 2.4 and the convex ribs 1.2.2 are shown in Fig. Match as shown.

[0054] Coordinated Example 3: Combination Figure 7 As shown, the difference from the first embodiment is that the underside of the groove 1.2.1 of the guide sleeve 1 is provided with a shrinkage 1.2.3 formed by screw riveting, and the shrinkage 1.2.3 is formed to connect with the groove 1.2.1 And the structure bent inside the guide guide slee...

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PUM

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Abstract

The invention discloses a high-pressure oil pump roller tappet for an engine. The roller tappet is used for an engine oil spraying system, is mounted between a driving cam in an engine cylinder cover and an oil pump plunger, and comprises a guide sleeve, a U-shaped bracket and a pin shaft roller suite. The U-shaped bracket is formed by wholly punching a steel plate; the guide sleeve adopts a special window opening mode; and two ends of the pin shaft need no riveting. The high-pressure oil pump roller tappet for the engine is few in structural parts and integral in functions, can effectively reduce total weight, reduces the motion inertia force, reduces the friction and the wear, is stable in work, and improves the engine efficiency.

Description

technical field [0001] The invention relates to the technical field of engine equipment, in particular to a roller tappet of a high-pressure oil pump for an engine. Background technique [0002] The roller tappet is an important part of an automobile engine that uses a high-pressure oil pump system. It is installed between the drive cam and the tappet, and converts the rotational motion of the drive cam into a linear reciprocating motion while pushing the tappet to move. The main structure includes a guide sleeve , brackets, rollers and pins. [0003] The guide sleeve of the roller tappet of the existing high-pressure oil pump is a cylindrical shell, which is made of complex cold forming. Efficiency in use; the guide sleeve and the bracket are integrally formed by forging, which causes the lateral force of the external drive cam on the bracket to be transmitted to the guide sleeve, which will not only cause the deformation of the guide sleeve, but also cause the guide sleev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M39/02F02M59/10
CPCF02M39/02F02M59/102
Inventor 徐纳
Owner HANGZHOU XZB TECH