CN202628343U

CN202628343U - Cam shaft of fuel oil supply pump of motor vehicle engine

Info

Publication number: CN202628343U
Application number: CN 201220314985
Authority: CN
Inventors: 周斌; 王亚会
Original assignee: CHONGQING FUEL-OIL JET SYSTEM Co Ltd CHINA HEAVY AUTOMOBILE GROUP
Current assignee: CHONGQING FUEL-OIL JET SYSTEM Co Ltd CHINA HEAVY AUTOMOBILE GROUP
Priority date: 2012-07-02
Filing date: 2012-07-02
Publication date: 2012-12-26
Anticipated expiration: 2022-07-02

Abstract

The utility model discloses a cam shaft of a fuel oil supply pump of a motor vehicle engine. The cam shaft comprises a cam and a roller, which are matched with each other, wherein a rim of the cam is recessed; and the surface shape of the rim of the cam is matched with that of the rim of the roller. The cam shaft of the fuel oil supply pump of the motor vehicle engine has the advantages that under the conditions of high rotating speed and high load, the cam shaft can effectively constrain the axial shifting of the roller, the plane friction of a large plane between the roller and a roller body is avoided, and the roller is prevented from being abraded. The cam shaft can bear high load and rotate at high speed on the original basis, and the working reliability of the fuel oil supply pump under the conditions of high rotating speed and high load is improved.

Description

Motor car engine fuel feed pump camshaft

Technical field

The utility model relates to a kind of motor car engine fuel feed pump, is specifically related to a kind of motor car engine fuel feed pump camshaft.

Background technique

Motor car engine fuel feed pump camshaft is an important spare part in the fuel feed pump; Play engine-driving power is passed to the roller body assembly, convert rotatablely moving of camshaft into plunger member upper and lower reciprocating important function by the roller body assembly.Motor car engine fuel feed pump camshaft generally all adopts cam to contact transmission power with the roller of roller body assembly, and the damage of roller body assembly or inefficacy will directly cause the trunk piston set cisco unity malfunction, causes whole fuel feed pump work to lose efficacy.

The proper functioning and the reliability of the good and bad pair roller body assembly of the cam structure of camshaft, performance play conclusive significant role.The cam and the roller contacting point of existing technology motor car engine fuel feed pump camshaft are straight line.Obviously, under the bigger situation of load, roller lacks kinematic constraint; Be prone to way roller body one side play and wear and tear with roller body, in case serious wear, with damage that causes the roller body assembly or inefficacy; To directly cause the trunk piston set cisco unity malfunction, and cause whole fuel feed pump work to lose efficacy.

Summary of the invention

The utility model is to the deficiency that exists in the background technique, and the technical problem that solve is: provide a kind of cam to contact with roller closely, the camshaft of a side play of less roller way roller body.

The utility model is for solving the problems of the technologies described above; The technological scheme of taking is: a kind of motor car engine fuel feed pump camshaft; The cam and the roller that comprise mutual coupling; Its improvement is: the wheel rim indent of cam, and the surface configuration of the surface configuration of cam wheel rim and roller wheel rim is complementary.

The utility model compared with prior art, beneficial effect is: camshaft is under high rotating speed and high load, but the axial float of operative constraint roller has been avoided the big plane generating plane friction between roller and the roller body, prevents rolling wheel wear.Camshaft can bear bigger load and the rotating speed of Geng Gao on the original basis, has strengthened the reliability that the fuel feed pump is worked under high load, high rotating speed.

Description of drawings

Fig. 1 is the work schematic representation of existing technology motor car engine fuel feed pump cam;

Fig. 2 is the plan view of existing cam;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the plan view of the utility model cam;

Fig. 5 is the work schematic representation of the utility model motor car engine fuel feed pump cam.

Wherein: plunger 1, roller body 2, roller pin 3, roller 4, cam 5.

Embodiment

Below in conjunction with accompanying drawing the mode of execution of the utility model is done further explain.

See Fig. 1 to shown in Figure 5, motor car engine fuel feed pump camshaft comprises the cam 5 and roller 4 of mutual coupling, the wheel rim indent of cam 5, and the surface configuration of the surface configuration of cam 5 wheel rims and roller 4 wheel rims is complementary.

Change the axial rectilinear form of cam 5 wheel rims into camber line, when cam 5 contacts with roller 4, because cam 5 working surfaces are concave surface; Roller 4 is contacted with the minimum point of cam 5 concave surfaces all the time; And be in the central position, it is moving to have limited the roller 4 way roller bodies 2 one side strings that are through on the roller pin 3, can prevent effectively to rub with roller body 2 roller chambeies; Avoid causing wearing and tearing, ensured the permanently effective work of plunger 1.

After adopting the utility model, camshaft is under high rotating speed and high load, but the axial float of operative constraint roller has been avoided the big plane generating plane friction between roller and the roller body, prevents rolling wheel wear.Camshaft can bear bigger load and the rotating speed of Geng Gao on the original basis, has strengthened the reliability that the fuel feed pump is worked under high load, high rotating speed.

Claims

1. motor car engine fuel feed pump camshaft; The cam (5) and the roller (4) that comprise mutual coupling; It is characterized in that: the wheel rim indent of cam (5), and the surface configuration of the surface configuration of cam (5) wheel rim and roller (4) wheel rim is complementary.