CN212003933U

CN212003933U - Mechanical tappet

Info

Publication number: CN212003933U
Application number: CN202020393909.9U
Authority: CN
Inventors: 张寅虎; 谭富明; 谢振东; 连东波
Original assignee: Weihai Chongding Utopia Intelligent Equipment Co ltd
Current assignee: Weihai Chongding Utopia Intelligent Equipment Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-11-24
Anticipated expiration: 2030-03-25

Abstract

The utility model relates to a mechanical tappet, it has solved the difficult processing of the inside spherical structure of current mechanical tappet, is difficult for realizing heat treated technical problem, and it is equipped with mechanical tappet body, and mechanical tappet body is equipped with the hole, and ball socket inserts has been installed to the hole, and ball socket inserts up end center is equipped with the hemisphere pit, and hemisphere pit lower extreme is equipped with the through-hole of bottom surface under the intercommunication. The utility model discloses can extensively be applied to various diesel engine.

Description

Mechanical tappet

Technical Field

The utility model relates to a mechanical engineering technical field especially relates to a mechanical tappet of improvement ball socket.

Background

At present, a cylindrical mechanical tappet is of an integral structure, and an internal spherical structure is subjected to heat treatment after being machined so as to meet the existing use requirement; the space of the inner cavity is limited, the processing difficulty is increased, the realization is difficult, and in the heat treatment process, the heat treatment requirement of the ball socket part is met, and the common quenching equipment and the quenching technology are difficult to realize.

On the other hand, the overall performance of the cylindrical mechanical tappet needs to be guaranteed, the requirements on material selection are particularly high, and the requirements on material processability and heat treatment reliability are particularly strict, so that certain limitations are brought to material selection.

Disclosure of Invention

The utility model discloses a solve the difficult processing of the inside spherical surface structure of current mechanical tappet, be difficult for realizing the technical problem of thermal treatment, provide an easy processing, the mechanical tappet of easy thermal treatment.

The utility model provides a mechanical tappet, it is equipped with mechanical tappet body, and mechanical tappet body is equipped with the hole, and the ball socket inserts has been installed to the hole, and ball socket inserts up end center is equipped with the hemisphere pit, and hemisphere pit lower extreme is equipped with the through-hole of bottom surface under the intercommunication.

Preferably, the mechanical tappet body is assembled with the ball socket insert in an interference fit mode, and the assembly interference is 0.02mm-0.04 mm.

Preferably, the material of the mechanical tappet body is 40Cr through thermal refining.

Preferably, the ball socket insert is made of Cr12MoV through quenching and tempering treatment.

Preferably, the depth of the hardened layer of the ball socket insert is 1.5-2.5mm, and the surface hardness is HRC 52-57.

The utility model has the advantages that:

the ball socket in the traditional mechanical tappet is decomposed to form the tappet and an independent insert, so that the tappet and the independent insert are simplified into an assembly part easy to machine, and meanwhile, a better wear-resistant material is selected, so that the machinability of the tappet is improved, and the machining requirement can be met by using a common numerical control lathe; different heat treatment processes are adopted for different structures, so that the hardness and the wear resistance of the ball socket insert are improved, the service life of the mechanical tappet is prolonged, and the reliability of a product is greatly ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the structure of the ball socket insert of the present invention.

Description of the symbols of the drawings:

1. a mechanical tappet body; 2. a socket insert.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, so that those skilled in the art can easily implement the present invention.

Example 1: as shown in fig. 1-2, the utility model discloses be equipped with mechanical tappet body 1, mechanical tappet body 1 center is equipped with the hole, and the built-in ball socket inserts 2 that is equipped with of hole, ball socket inserts 2 upper end center are equipped with the hemisphere pit, and the pit lower extreme is equipped with the through-hole of bottom surface under the intercommunication. The ball socket insert 2 and the inner hole of the mechanical tappet body 1 are in interference fit, the assembling interference magnitude is 0.02mm-0.04mm, the assembly is easy during the assembly, and the ball socket insert cannot fall off after the assembly.

The mechanical tappet body 1 is made of 40Cr quenched and tempered steel, 40Cr steel is one of the most widely used steels in the mechanical manufacturing industry, and the quenched and tempered steel has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity; the mechanical tappet body 1 subjected to the quenching and tempering treatment by 40Cr has good hardenability and cutting performance, the machinability of the mechanical tappet body 1 is improved, and the machining requirement can be met by using a common numerical control lathe. The ball socket insert 2 is made of Cr12MoV quenching and tempering treatment, the Cr12MoV steel has good hardenability and high hardness and wear resistance of quenching and tempering, and the wear resistance and reliability of the mechanical tappet are improved; the ball socket insert 2 is integrally quenched, and the surface hardness is HRC52-57, so that the good wear resistance and impact resistance of the ball socket insert are ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the scope defined by the claims of the present invention shall be within the protection scope of the present invention.

Claims

1. The mechanical tappet is provided with a mechanical tappet body and is characterized in that the mechanical tappet body is provided with an inner hole, a ball socket insert is arranged in the inner hole, a hemispherical pit is formed in the center of the upper end face of the ball socket insert, and a through hole communicated with the lower bottom face is formed in the lower end of the hemispherical pit.

2. The mechanical tappet according to claim 1, wherein the mechanical tappet body is assembled with the ball socket insert in an interference fit manner, and the interference of assembly is 0.02mm-0.04 mm.

3. The mechanical tappet according to claim 2, wherein the material of the mechanical tappet body is 40Cr heat treatment.

4. The mechanical tappet according to claim 2, wherein the ball socket insert is made of Cr12MoV through quenching and tempering.

5. The mechanical tappet of claim 4, wherein the tappet body has a hardened depth of 1.5-2.5mm and a surface hardness of HRC 52-57.