CN216841858U

CN216841858U - Tappet column

Info

Publication number: CN216841858U
Application number: CN202123362833.7U
Authority: CN
Inventors: 郭宇飞; 和晓锋; 王春燕
Original assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd; Chongqing Weichai Engine Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-28
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a tappet, include: the tappet body is provided with a roller groove for accommodating the roller and a top block hole for fixing the top block, the bottom of the roller groove is provided with an oil storage groove, the roller pin is installed on the tappet body and penetrates through the roller groove, the roller sleeve is arranged on the roller pin, and the two sides of the roller groove are respectively provided with a longitudinal oil groove communicated with the oil storage groove. In the diesel engine operation in-process, lubricating oil can be fine flows into the oil storage tank of gyro wheel below through vertical oil groove, makes the lower part of gyro wheel soak in lubricating oil always like this, has guaranteed under big effort that the gyro wheel can be in always by lubricated state, and bonding can not take place for gyro wheel and camshaft, and gyro wheel and camshaft can not take place the pit yet and hinder, have guaranteed the reliability of gyro wheel.

Description

Tappet column

Technical Field

The utility model relates to an engine parts technical field, specific theory relates to a tappet.

Background

As shown in fig. 1, which is a schematic structural diagram that a camshaft 1 drives an injection pump 3 through a tappet 2, the tappet 2 is located between the camshaft 1 and the injection pump 3, and the tappet 2 plays a role in starting and stopping, and transmits an oil supply profile of the camshaft 1 to the injection pump 3 through the tappet 2, so that the purpose that the injection pump 3 injects fuel into a combustion chamber at a specific time is achieved.

Along with the demand of the market for the power of the engine, the strengthening coefficient of the engine needs to be continuously optimized and improved, the high strengthening coefficient represents high explosion pressure, the high explosion pressure needs a more proper fuel injection pump 3 to provide fuel, the proper fuel injection pump 3 has high pump end pressure, and under the condition that the structure of the original diesel engine is not changed, the high pump end pressure puts high requirements on the reliability of parts of the diesel engine, so that a more reliable tappet 2 structure is needed to ensure that the abrasion and the bonding do not occur under the acting force of the high pump end pressure.

The oil groove of the roller pin 22 in the existing tappet 2 faces downwards, and under low detonation pressure, the structure of the tappet 2 is small in stress, the effect of starting up can be played, the oil supply curve of the camshaft 1 can be well transmitted to the oil injection pump 3, so that the faults such as bonding can not occur in each part under the condition of ensuring the dynamic property and reliability of a diesel engine, but when the power is improved to a certain degree, the stress of the tappet 2 of the structure is increased, the original lubrication can not meet the requirement, and the roller 23 is bonded with the camshaft 1.

On the premise of improving detonation pressure and power, the pressure of the pump end of the fuel injection pump 3 needs to be increased, on the premise that the structures of other parts of the diesel engine do not change, a larger force is needed to transmit the oil supply molded line of the camshaft 1 to the fuel injection pump 3 through the tappet 2, so that the fuel injection pump 3 is opened to achieve the purpose of fuel injection, but the large force needs to be transmitted through the tappet 2, because the roller 23 is in mutual contact with the camshaft 1, the surface of the corresponding roller 23 also receives the larger force at the same time, under the continuous operation process of the diesel engine, the roller 23 and the camshaft 1 form relative motion and relative extrusion force, so that the roller 23 bears the large acting force for a long time, the roller 23 and the camshaft 1 are damaged, and the reliability and the dynamic property of the diesel engine product are influenced.

Disclosure of Invention

To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: the tappet effectively prevents the roller and the camshaft from being worn and adhered.

In order to solve the technical problem, the technical scheme of the utility model is that:

a tappet, comprising: the tappet body is provided with a roller groove for accommodating the roller and a top block hole for fixing the top block, the bottom of the roller groove is provided with an oil storage groove, the roller pin is installed on the tappet body and penetrates through the roller groove, the roller sleeve is arranged on the roller pin, and two sides of the roller groove are respectively provided with a longitudinal oil groove communicated with the oil storage groove.

Preferably, the longitudinal oil groove is an arc-shaped groove.

Preferably, the roller groove is communicated with the top block hole, and the tappet body and the top block jointly form the oil storage groove below the roller.

Preferably, two annular oil grooves are formed in the outer cylindrical surface of the tappet body, one annular oil groove is located at the fork of the tappet body, and the other annular oil groove is located at the lower portion of the tappet body.

Preferably, axially protruding bosses are arranged in the middle of two end faces of the roller and are in contact with the tappet body.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

this application is equipped with twice and the communicating vertical oil groove of oil storage tank on the tappet body, at the diesel engine operation in-process, lubricating oil can be fine flows in the oil storage tank of gyro wheel below through vertical oil groove, makes the lower part of gyro wheel soak in lubricating oil always like this, has guaranteed under big effort, and the gyro wheel can be in always by lubricated state, and gyro wheel and camshaft can not take place to bond, and gyro wheel and camshaft can not take place the pit yet and hinder, have guaranteed the reliability of gyro wheel.

Be equipped with two annular oil grooves on the face of cylinder of tappet body, an annular oil groove is located the jag department of divergence of tappet body, and another annular oil groove is located the lower part of tappet body, and the tappet body is reciprocating motion in-process from top to bottom constantly, and the annular oil groove that is located the middle part of tappet body lets the lubricating oil flow of bottom around the tappet body, has guaranteed the lubrication of tappet body, has reduced the wearing and tearing of tappet body, has guaranteed the reliability of tappet body.

Drawings

FIG. 1 is a schematic view of a camshaft driving an injection pump through a conventional tappet;

FIG. 2 is a schematic cross-sectional view of a tappet according to the present invention;

FIG. 3 is a schematic cross-sectional view of the body of the stile of FIG. 2;

FIG. 4 is a schematic top view of the structure of FIG. 3;

in the figure: 1. a camshaft; 2. a tappet; 20. a gap; 21. a tappet body; 22. a roller pin; 23. a roller; 231. a boss; 24. a top block; 25. a roller groove; 26. a top block hole; 27. a longitudinal oil groove; 28. an annular oil groove; 29. an oil storage tank; 3. a camshaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 2 to 4 in common, a tappet, the tappet 2 includes: the tappet comprises a tappet body 21, a roller pin 22, a roller 23 and a top block 24, wherein the tappet body 21 is provided with a roller groove 25 for accommodating the roller 23 and a top block hole 26 for fixing the top block 24, the bottom of the roller groove 25 is provided with an oil storage groove 29, the roller pin 22 is installed on the tappet body 21 and penetrates through the roller groove 25, the roller pin 22 is sleeved on the roller 23, and two sides of the roller groove 25 are respectively provided with a longitudinal oil groove 27 communicated with the oil storage groove 29.

The longitudinal oil groove 27 is preferably arc-shaped, and may be U-shaped or V-shaped, as long as it can guide the lubricating oil to the oil reservoir 29.

The tappet body 21 and the top block 24 together form an oil reservoir 29 below the roller 23.

Two annular oil grooves 28 are formed in the outer cylindrical surface of the tappet body 21, one annular oil groove 28 is located at the fork of the tappet body 21 and corresponds to the oil storage groove 29 in position, and the other annular oil groove 28 is located at the lower portion of the tappet body 21.

The middle parts of the two end surfaces of the roller 23 are provided with bosses 231 protruding axially, the bosses 231 are in contact with the tappet body 21 to prevent the roller 23 from moving axially, and a gap 20 is reserved between the outer side of the two end surfaces of the roller 23 and the tappet body 21 to ensure that the contact area between the roller 23 and the tappet body 21 is small and the interference between the roller 23 and the tappet body 21 is avoided as much as possible.

On the premise that the structures of other parts of the diesel engine are not changed, the power is improved, the reliability and the power performance of the diesel engine are ensured under the condition of improving the detonation pressure, two longitudinal oil grooves 27 and two annular oil grooves 28 are additionally arranged on the tappet body 21, in the operation process of the diesel engine, lubricating oil can well flow into an oil storage groove 29 below the roller 23 through the longitudinal oil grooves 27, so that the lower part of the roller 23 is always soaked in the lubricating oil, the roller 23 can be always in a lubricated state under a large acting force, the roller 23 and the camshaft 1 cannot be bonded, the roller 23 and the camshaft 1 cannot be damaged by pits, the reliability of the roller 23 is ensured, meanwhile, in the continuous up-and-down reciprocating motion process of the tappet body 21, the annular oil grooves 28 at the fork positions of the tappet body 21 enable the lubricating oil at the bottom to flow to the periphery of the tappet body 21, and the lubrication of the tappet body 21 is ensured, the abrasion of the tappet body 21 is reduced, and the reliability of the tappet body 21 is ensured.

This application has improved the reliability of tappet through improving the lubricated structure of gyro wheel 23 and tappet body 21, has also improved the reliability and the dynamic property of diesel engine.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims

1. A tappet comprising: the tappet is provided with a roller groove for accommodating the roller and a top block hole for fixing the top block, the bottom of the roller groove is provided with an oil storage groove, the roller pin is installed on the tappet body and penetrates through the roller groove, and the roller is sleeved on the roller pin.

2. The tappet of claim 1, wherein the longitudinal oil groove is an arcuate groove.

3. The tappet of claim 1, wherein the roller groove communicates with the top block bore, the tappet body and the top block together forming the oil reservoir below the roller.

4. The tappet of claim 1, wherein the outer cylindrical surface of the tappet body is provided with two annular oil grooves, one of the annular oil grooves being located at the divergence of the tappet body, the other of the annular oil grooves being located at the lower portion of the tappet body.

5. The tappet of claim 1, wherein axially projecting bosses are provided in the middle of the two end surfaces of the roller, the bosses contacting the tappet body.