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Fuel injection device, tappet and tappet housing

A shell and pin technology, applied in fuel injection devices, fuel injection pumps, charging systems, etc., can solve the problems of high cost and reduced assembly joints

Inactive Publication Date: 2019-05-10
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing tappet shell has a pin hole, and the pin and the shell are fixed by riveting, which requires that the pin must be heat treated by induction hardening, which is costly, and also requires investment in riveting equipment and assembly cycle time. Reduced by the riveting process

Method used

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  • Fuel injection device, tappet and tappet housing
  • Fuel injection device, tappet and tappet housing
  • Fuel injection device, tappet and tappet housing

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Embodiment Construction

[0033] It can be seen from the background art that the technical problem solved by the embodiments of the present invention is to simplify the assembly between the pin and the housing and improve the assembly efficiency.

[0034] Please refer to Figure 1-Figure 3 , figure 1 is a structural schematic diagram of a tappet shell; figure 2 is a structural schematic diagram of a tappet; image 3 yes figure 2 Sectional view along A-A direction.

[0035] As shown in the figure, a tappet includes a tappet housing, a pin 1, a roller (not shown) and a roller 4, and the housing is provided with a pin hole 100. When assembling the tappet, the roller is first loaded into The inner surface of the roller 4, and insert the pin 1 substitute inside the roller, so that the rollers are distributed on the inner ring surface of the roller 4, that is, the pre-assembly of the roller and the roller 4 is completed. After that, the assembly of the roller and the roller 4 is put into the tappet ho...

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Abstract

The invention provides a fuel injection device, a tappet and a tappet housing. The tappet housing is suitable for a pin fixedly assembled on the tappet housing; pin fixing grooves are formed in the inner ring surface of the tappet housing; each pin fixing groove comprises a radial opening, an axial opening, and bottom walls; the opening direction of the radial opening faces the axial direction ofthe tappet housing; the opening direction of the axial opening is parallel to the axis extension direction of the tappet housing; one bottom wall opposite to the radial opening is used for stopping anaxial end part of the pin; the other bottom wall opposite to the axial opening is used for supporting an outer ring surface of the pin; the width between two side walls which are adjacent to the axial opening and are oppositely arranged is larger than or equal to the diameter of the pin; and the number of the pin fixing grooves is two, and the two pin fixing grooves are oppositely arranged in theradial direction of the tappet housing. The tappet housing is simple to assemble, so that the installation efficiency is high, and the machining cost of the pin is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the field of fuel injection of internal combustion engines, and in particular to a fuel injection device, a tappet and a tappet housing. Background technique [0002] The high-pressure oil pump is actuated by a corresponding cam of a rotating shaft of the internal combustion engine, such as a camshaft or crankshaft. More specifically, the high-pressure oil pump is provided with tappets, and the plunger of the high-pressure oil pump can reciprocate under the driving action of the tappets to provide power for the high-pressure oil pump. The tappet is arranged between the plunger of the high-pressure oil pump and the cam of the camshaft. When the camshaft rotates, the cam drives the tappet to reciprocate in the through hole of the cylinder head, and the tappet drives the plunger to reciprocate. [0003] The existing tappet shell has a pin hole, and the pin and the shell are fixed by riveting, which requi...

Claims

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Application Information

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IPC IPC(8): F02M59/10
Inventor 高辉
Owner SCHAEFFLER TECH AG & CO KG
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