CN215927496U

CN215927496U - Tappet and engine

Info

Publication number: CN215927496U
Application number: CN202120516721.3U
Authority: CN
Inventors: 吕祥; 闫利利; 王有治; 吴雪雷
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2022-03-01
Anticipated expiration: 2031-03-11

Abstract

The utility model relates to the technical field of engines and discloses a tappet and an engine. The engine comprises a camshaft and the tappet, wherein the cam part of the camshaft can be inserted into the guide part to be matched with the guide part. The tappet and the engine solve the problems that the existing tappet is oriented through the positioning key arranged in the tappet cavity of the engine body, and the positioning key is inconvenient to disassemble and assemble.

Description

Tappet and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a tappet and an engine.

Background

As shown in fig. 1, the conventional tappet performs the orientation of the roller tappet 2 by means of a navigation key 3 installed on the body 1 to prevent the roller tappet 2 from being steered during operation. There are problems in that: the positioning key 3 is fixed in a tappet cavity of the machine body 1 through a bolt, so that the disassembly and the assembly are inconvenient and the efficiency is low; moreover, the bolt and the positioning key 3 have the risk of mistakenly falling into the tappet cavity of the machine body 1 in the dismounting process.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tappet and an engine, which are used for solving the problem that the existing tappet is inconvenient to assemble and disassemble through the orientation of a positioning key arranged in a tappet cavity of an engine body.

In order to achieve the purpose, the utility model provides the following technical scheme:

a tappet, comprising: the tappet body, the tappet body is used for being close to the one end of camshaft and is equipped with the guide part, the guide part is used for cooperating with the cam portion on the camshaft to guide the motion of tappet.

According to the tappet provided by the utility model, the guide part is arranged at one end, close to the cam shaft, of the tappet body, the movement of the tappet is guided through the matching of the guide part and the cam part on the cam shaft, a positioning key is not required to be installed in a tappet cavity of a machine body, the assembly efficiency can be improved, and the problems of inconvenience in mounting and dismounting and low efficiency of the positioning key are avoided; meanwhile, the risk that the positioning key and the bolt for fixing the positioning key drop into the tappet cavity of the engine body by mistake in the dismounting process does not exist, the normal operation of the engine is favorably ensured, and the tappet is more convenient to assemble and maintain.

Optionally, the guide portion comprises two guide ears disposed oppositely.

Optionally, the length of the guide lug in the axial direction of the tappet body is 3-8 mm.

Optionally, both the guide lugs and the tappet body are of an integral structure.

Optionally, the tappet comprises a roller, a cavity for mounting the roller is formed in the tappet body, the roller is rotatably arranged in the cavity, and part of the roller is located between the two guide lugs;

the roller is used for being matched with the cam part on the cam shaft in a rolling mode.

The utility model further provides an engine, which comprises a camshaft and any one of the tappets provided in the technical scheme, wherein the cam part of the camshaft can be inserted into the guide part to be matched with the guide part.

The engine provided by the utility model comprises the camshaft and any one of the tappets, wherein one end of the tappet body, which is close to the camshaft, is provided with the guide part, the guide part is matched with the cam part on the camshaft to guide the movement of the tappet, a positioning key is not required to be arranged in a tappet cavity of the engine body, the problems of inconvenience in mounting and dismounting and low efficiency of the positioning key can be avoided, and meanwhile, the risk that the positioning key and a bolt for fixing the positioning key fall into the tappet cavity of the engine body by mistake in the mounting and dismounting process is avoided.

Optionally, when the guide portion includes two guide lugs arranged oppositely, the cam portion is located between the two guide lugs, and the distance between the cam portion and each of the two guide lugs is less than or equal to 0.5 mm.

Drawings

FIG. 1 is a schematic view of a prior art tappet assembled in a machine body;

FIG. 2 is a schematic structural view of a tappet provided according to an embodiment of the present invention;

fig. 3 is a schematic partial structural diagram of an engine according to an embodiment of the present invention.

Icon: 10-a tappet body; 11-a guide; 12-a guide lug; 13-a roller; 20-a camshaft; 21-a cam portion; 1-body; 2-roller tappet; 3-alignment key.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 2 and 3, the present embodiment provides a lifter including: the tappet body 10, wherein one end of the tappet body 10 close to the camshaft 20 is provided with a guide part 11, and the guide part 11 is used for cooperating with a cam part 21 on the camshaft 20 to guide the movement of the tappet.

According to the tappet provided by the embodiment, the guide part 11 is arranged at one end, close to the cam shaft 20, of the tappet body 10, the guide part 11 is matched with the cam part 21 on the cam shaft 20 to guide the movement of the tappet, the positioning key 3 does not need to be arranged in the tappet cavity of the machine body 1, the problems of inconvenience in mounting and dismounting and low efficiency of the positioning key 3 can be avoided, and the assembly efficiency is improved; meanwhile, the risk that the positioning key 3 and a bolt for fixing the positioning key 3 drop into the tappet cavity of the engine body 1 by mistake in the dismounting process does not exist, the normal operation of the engine is favorably ensured, and the assembly and the maintenance are more convenient.

When the guide portion 11 is specifically provided for convenience of processing, the guide portion 11 may include two guide ears 12 disposed oppositely.

Further, to simplify the assembly process, the two guide lugs 12 may be integrally formed with the tappet body 10.

The length of the guide lug 12 in the axial direction of the tappet body 10 can be set according to practical conditions, and in order to enable the guide lug 12 to be well matched with the cam part 21 on the cam shaft 20 without departing, in an alternative implementation manner, the length of the guide lug 12 in the axial direction of the tappet body 10 can be 3-8 mm, for example: 3mm, 5mm, 7.5mm or 8 mm.

In order to reduce the friction between the tappet and the cam portion 21 of the camshaft 20, in an alternative implementation, the tappet may include a roller 13, a cavity for mounting the roller 13 is formed in the tappet body 10, and the roller 13 is rotatably disposed in the cavity and partially located between the two guide lugs 12; the roller 13 is adapted to be in rolling engagement with a cam portion 21 on the camshaft 20.

The present embodiment provides an engine including a camshaft 20 and any one of the tappets described above, wherein the cam portion 21 of the camshaft 20 can be inserted into the guide portion 11 to be engaged with the guide portion 11.

The engine that this embodiment provided includes camshaft 20 and above-mentioned arbitrary tappet, tappet body 10 is close to camshaft 20's one end and sets up guide part 11, the motion to the tappet is led through the cooperation of guide part 11 and the cam portion 21 on the camshaft 20, need not to install navigation key 3 in 1 tappet chamber of organism, can avoid 3 dismouting inconveniences of navigation key, the problem of inefficiency, simultaneously, there is not the risk that the bolt mistake of 3 and the fixed navigation key of dismouting in-process navigation key 3 falls into 1 tappet chamber of organism.

In an alternative implementation, when the guide portion 11 includes two guide lugs 12 disposed oppositely, the cam portion 21 is located between the two guide lugs 12 and is spaced from the two guide lugs 12 by 0.5mm or less, so as to ensure the movement direction of the tappet and make the relative movement between the tappet and the camshaft 20 smooth.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A tappet characterized by comprising: the tappet body is provided with a guide part at one end close to the cam shaft, and the guide part is matched with a cam part on the cam shaft so as to guide the movement of the tappet;

the guide part comprises two guide lugs which are oppositely arranged.

2. The tappet according to claim 1, wherein the length of the guide lug in the axial direction of the tappet body is 3 to 8 mm.

3. The tappet of claim 1, wherein both of the guide ears are of unitary construction with the tappet body.

4. The tappet according to any one of claims 1 to 3, comprising a roller, wherein a cavity for mounting the roller is arranged in the tappet body, the roller is rotatably arranged in the cavity, and part of the roller is positioned between the two guide lugs;

5. An engine characterized by comprising a camshaft and the lifter of any one of claims 1 to 4, the cam portion of the camshaft being insertable in the guide portion to cooperate with the guide portion.

6. The engine of claim 5, wherein when the guide portion comprises two oppositely arranged guide lugs, the cam portion is located between the two guide lugs and is spaced from the two guide lugs by 0.5mm or less.