CN202707171U

CN202707171U - Cam shaft bearing cover for engine

Info

Publication number: CN202707171U
Application number: CN 201220339255
Authority: CN
Inventors: 张应兵; 杨林强; 王英杰; 欧阳彩云; 陈亮; 姚巍; 罗俊; 李欢
Original assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2012-07-13
Filing date: 2012-07-13
Publication date: 2013-01-30
Anticipated expiration: 2022-07-13

Abstract

The utility model relates to a cam shaft bearing cover for an engine. A front end face is arranged on one side wall of a cover body; a rear end face is arranged on the other side wall of the cover body; a matching surface matched with a cylinder cover is arranged on the bottom surface; two semicircular bearing base holes are arranged on the side of the bottom surface; the cam shaft bearing cover is characterized in that: outward extending semicircular lug bosses are respectively arranged on the front end face of the cover body corresponding to the two semicircular bearing base holes; an axial timing raised bar or an axial groove is arranged on an outer surface of each of the semicircular lug bosses; the axial timing raised bar or the axial groove has a timing marking function; and an axial length of each of the semicircular lug bosses is less than the axial length of a first shaft neck at the front end of a cam shaft. According to the cam shaft bearing cover for the engine, the casting and processing technical difficulties of the cylinder cover are greatly reduced; the cost is lowered; a timing marking structure is designed on the bearing cover; the timing marking structure is molded through casting; the technology is simple; a timing chain wheel distance is short; and the assembling and the timing check are conveniently performed.

Description

A kind of camshaft-bearing cap of motor

Technical field

The utility model relates to technical field of internal combustion engines, is specifically related to a kind of camshaft-bearing cap of motor.

Background technique

Engine camshaft bearing cap in the past only has an effect, and that is exactly the stationary cam axle, prevents the circular runout that camshaft is in operation, and the axial clearance of camshaft is then controlled by the thrust structure on the cylinder cap.This is just so that the layout of cylinder cover structure and processing become is very difficult.In addition, owing to lack timing marks, it is very difficult that the assembling of engine timing system also just becomes.

The model utility content

In order to solve the technological deficiency of above-mentioned existence, the utility model provides the camshaft-bearing cap of a kind of technique motor simple, rational in infrastructure.

A kind of camshaft-bearing cap of motor comprises lid, one side of lid is front-end face, the another side is ear end face, the bottom surface is the fitting surface with cylinder cap, and underside side is provided with the semicircular bearing saddle bore in two places, it is characterized in that: be respectively equipped with to the boss of overhanging semi-annular shape on the front-end face of the lid corresponding with the semicircular bearing saddle bore in two places, the outer surface of the boss of each semi-annular shape is provided with axial timing raised line or axial timing groove, timing raised line or axial timing groove play the timing marks effect, and the axial length of the boss of described semi-annular shape is less than the axial length of camshaft front end the first axle journal.

During the utility model assembling, camshaft-bearing cap prevents the axial float of camshaft by the axial clearance that cooperates to control camshaft of boss with the camshaft of two semi-annular shapes.Such design improvement the in the past design take cylinder cap front end camshaft hole as thrust structure, greatly reduce casting and the processing technology difficulty of cylinder cap, reduced cost.The utility model has also designed the timing marks structure at bearing cap, and this structure is by casting, and technique is simple, and and the timing sprocket close together, be convenient to assembling and check timing.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the plan view of Fig. 1.

Fig. 3 is the A-A sectional view of Fig. 2.

Fig. 4 is the plan view of assembling condition.

Sequence number among the upper figure: the boss 11 of lid 10, semi-annular shape, timing raised line 12, camshaft 20, valve timing adjuster 50, timing marks 51.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment 1

Referring to Fig. 1 and Fig. 2, a kind of camshaft-bearing cap of motor comprises lid 10, one side of lid 10 is front-end face, the another side is ear end face, the bottom surface is the fitting surface with cylinder cap, and underside side is provided with the semicircular bearing saddle bore in two places, is respectively equipped with the boss 11 to overhanging semi-annular shape on the front-end face of the lid 10 corresponding with the semicircular bearing saddle bore in two places, the outer surface of the boss 11 of each semi-annular shape is provided with axial timing raised line 12, and timing raised line 12 plays the timing marks effect.Referring to Fig. 3, the axial length D1 of the boss 11 of semi-annular shape is less than the axial length D2 of camshaft 20 front ends the first axle journal.The axial length D1 of semicircular boss 11 is 30.60 ~ 30.65mm, and the axial length D2 of camshaft 20 front ends the first axle journal is 30.75 ~ 30.80mm.Referring to Fig. 4, during assembling, the axial clearance that cooperates to control camshaft of the physical dimension D2 on the physical dimension D1 of lid 10 by the boss 11 of two semi-annular shapes and the camshaft 20 guarantees that the axial clearance of camshaft 20 is between 0.10 ~ 0.20mm.Such design has changed in the past with the idea of cylinder cap front end camshaft hole as thrust structure, greatly reduces casting and the difficulty of processing of cylinder cap, also is convenient to the layout of cylinder bolt hole.

During assembling, when motor one cylinder piston was positioned at compression top center, the timing marks 51 on the valve timing adjuster 50 was just relative with timing raised line 12 on the lid 10, and the assembling of timing chain and the inspection in later stage are convenient in such design.

Embodiment 2

The outer surface of the boss 11 of each semi-annular shape is provided with axial timing groove, and the timing groove plays the timing marks effect.

The other the same as in Example 1.

Claims

1. the camshaft-bearing cap of a motor, comprise lid, one side of lid is front-end face, the another side is ear end face, the bottom surface is the fitting surface with cylinder cap, and underside side is provided with the semicircular bearing saddle bore in two places, it is characterized in that: be respectively equipped with to the boss of overhanging semi-annular shape on the front-end face of the lid corresponding with the semicircular bearing saddle bore in two places, the outer surface of the boss of each semi-annular shape is provided with axial timing raised line or axial groove, timing raised line or axial groove play the timing marks effect, and the axial length of the boss of described semi-annular shape is less than the axial length of camshaft front end the first axle journal.