CN220470045U

CN220470045U - Structure assembly of valve tappet of automobile engine

Info

Publication number: CN220470045U
Application number: CN202322289670.7U
Authority: CN
Inventors: 胡兴文
Original assignee: Mianyang Tuopu Engine Parts Co ltd
Current assignee: Mianyang Tuopu Engine Parts Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-02-09
Anticipated expiration: 2033-08-25

Abstract

The utility model discloses a structural assembly of an automobile engine valve tappet, which relates to the technical field of engine valve lifters and comprises a hollow tappet housing and a nut, wherein a through hole communicated with an inner cavity of the tappet housing is formed in the groove, the nut extends downwards from the lower part of a connecting ball, a circular ring-shaped filter screen is sleeved outside a mounting groove, and rolling balls abutting against the inner surface of the filter screen are inserted and mounted in the inner parts of a plurality of mounting holes. According to the utility model, the original sliding friction between the tappet and the cam is changed into rolling friction, so that the cam and the tappet are prevented from being worn too fast, meanwhile, the engine oil coated on the outer surface of the connecting ball can also play a role in lubricating the connecting ball and the groove, the wear is further reduced, the reliability of the tappet is improved, the filter screen can play a certain role in filtering the engine oil entering the tappet, impurities such as metal chips and the like can be prevented from entering the tappet, and the normal operation of the tappet is ensured.

Description

Structure assembly of valve tappet of automobile engine

Technical Field

The utility model relates to the technical field of engine valve lifters, in particular to a structural assembly of an automobile engine valve lifter.

Background

A tappet is a major component of the valve train assembly other than the camshaft and is the follower of the cam, which functions to transmit motion and force from the cam to the pushrod or valve, while also bearing the lateral force exerted by the cam and transmitting it to the body or cylinder head. The tappet can be divided into two main types of mechanical tappet and hydraulic tappet, and each type of tappet has various structural forms such as plane tappet and liquid tappet, wherein the mechanical tappet has the advantages of simple arrangement form, low price and the like, and is widely applied to small-displacement engines. The mechanical tappet mainly comprises a cylindrical body with an inner cavity, and the cylindrical body is arranged in a tappet hole of a cylinder cover of the engine.

The utility model discloses a gapless valve slow-pressing tappet mechanism in the prior art CN 219344787U, which comprises parts such as a tappet shell, an oil inlet chamber, a large plunger, an inner tappet and the like, although the valve and the tappet shell are connected in a gapless way and realize seamless switching, the whole valve is sealed reliably, the responsiveness is fast, no collision is damaged, the guiding function is further improved, the movement stability of the large plunger is increased, the problem of guiding inclination of the large plunger is avoided, the end face of the valve tappet is directly contacted with a cam, splashed oil drops can lubricate the end face of the tappet during the cam operation, but the high-speed operation of the cam still possibly abrades the end face of the tappet and the edge of the cam, so that the faults caused by the abrasion of the end face of the tappet also become more common faults, engine oil can directly enter the tappet through an oil inlet during normal use, the inside of the tappet can be blocked due to the fact that impurities such as metal chips are doped in the engine oil for a long time, and certain influence is caused on the normal use of the tappet, and the stability is still required to be removed, and the stability is still further improved.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a structural assembly of an automobile engine valve tappet, which solves the problems in the prior art.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a structure assembly of automobile engine valve tappet, includes inside hollow form tappet shell and nut, the oil inlet that extends to the inner chamber is seted up to the surface of tappet shell, and the recess is seted up to the lower extreme of tappet shell, peg graft in the inside of recess has the connecting ball, and the inside of recess has seted up the through-hole that communicates with the inner chamber of tappet shell, the external screw thread has been seted up to the surface lower part of tappet shell, the internal surface of nut has seted up the internal screw thread with external screw thread looks adaptation, the nut passes through the internal screw thread and installs on the external screw thread, and the nut cup joints in the outside of connecting ball, the lower part of connecting ball downwardly extending nut;

the middle part of tappet shell is located the mounting groove of seting up the ring shape directly over the external screw thread, the outside of mounting groove has cup jointed the filter screen of ring shape, and a plurality of mounting hole has been seted up to the surface of mounting groove, a plurality of the inside of mounting hole is all pegged graft and is installed the rolling ball of butt in the filter screen internal surface.

Optionally, the shapes of the lower ends of the tappet housing and the screw cap are round tables, the inside of the screw cap is hollow with openings at the upper end and the lower end, and the shape of the groove is hemispherical.

Optionally, the inner bottom wall of tappet shell is fixed mounting has the little plunger rather than coaxial, the outside of little plunger cup joints the slip and has had big plunger, and leaves certain clearance between the surface of little plunger and the internal surface of big plunger, the inside fixed mounting of tappet shell has cup joints the guide pin bushing in big plunger outside, the guide pin bushing cup joints in the outside of little plunger.

Optionally, the first oilhole that extends to the inner chamber has been seted up to the surface lower part of little plunger, and the second oilhole that extends to the inner chamber has been seted up to the upper surface of little plunger, spring and sealing ball have been set gradually from last to down between the upper surface of the interior roof of big plunger and little plunger, the upper end butt in the interior roof of big plunger of spring, sealing ball butt in the upper end opening part of second oilhole, and the lower extreme of spring cup joints in sealing ball's upper portion.

Optionally, a gap is reserved between the inner ring of the filter screen and the outer surface of the mounting groove, and a plurality of mounting holes are distributed in an annular array along the axis of the tappet housing.

Optionally, the external opening of oil inlet is located the mounting groove, and the filter screen cup joints in the external end opening part of oil inlet.

Advantageous effects

The utility model provides a structural assembly of an automobile engine valve tappet, which has the following beneficial effects:

according to the structural assembly of the valve tappet of the automobile engine, through the matching arrangement of the grooves, the through holes and the connecting balls and the nuts, the original sliding friction between the tappet and the cam is changed into rolling friction, so that the cam and the tappet are prevented from being worn too fast, engine oil can be coated on the outer surface of the connecting balls through the through holes in the use process, therefore, when the connecting balls roll in the grooves, the engine oil can also play a lubricating role between the connecting balls and the grooves, the abrasion is further reduced, the reliability of the tappet is improved, and the probability of failure due to abrasion is reduced to a certain extent;

this automobile engine valve tappet's structure assembly sets up through the cooperation of mounting hole, rolling ball and filter screen, and the filter screen can play certain filtering action to the engine oil that gets into in the tappet, can effectively prevent impurity such as metal clastic from getting into the inside of tappet to prevent that impurity from causing the jam to the inside of tappet, guarantee the normal operating of tappet, and improve its life to a certain extent, and at this tappet reciprocating sliding's in-process, can throw away the impurity on the filter screen again under the effect of rocking force, prevent to cause the jam to the outer end of oil inlet, guarantee that engine oil is smooth and easy get into in the tappet.

Drawings

FIG. 1 is a schematic front perspective view of the present utility model;

FIG. 2 is a schematic diagram of a front perspective explosion structure of the utility model;

FIG. 3 is a schematic elevational cross-sectional view of the present utility model;

FIG. 4 is a schematic top cross-sectional view of the present utility model;

fig. 5 is an enlarged schematic view of the structure of fig. 4 a according to the present utility model.

In the figure: 1. a tappet housing; 101. a mounting groove; 102. an external thread; 103. an oil inlet; 104. a mounting hole; 105. a through hole; 106. a groove; 2. a screw cap; 201. an internal thread; 3. a connecting ball; 4. a filter screen; 5. guide sleeve; 7. a small plunger; 701. a first oil hole; 702. a second oil hole; 8. a large plunger; 9. a spring; 10. a sealing ball; 11. rolling ball.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Example 1

Referring to fig. 1 to 3, the present utility model provides the following technical solutions: the utility model provides a structure assembly of automobile engine valve tappet, including inside hollow tappet shell 1 and nut 2, the oil inlet 103 that extends to the inner chamber has been seted up to the surface of tappet shell 1, recess 106 has been seted up to the lower extreme of tappet shell 1, the lower extreme shape of tappet shell 1 and nut 2 is the round platform, the inside of nut 2 is the hollow form of upper and lower end all open-ended, and the shape of recess 106 is hemisphere, connect ball 3 has been pegged graft to the inside of recess 106, and the through-hole 105 with the inner chamber intercommunication of tappet shell 1 has been seted up to the inside of recess 106, the external screw thread 102 has been seted up to the surface lower part of tappet shell 1, the internal screw thread 201 with external screw thread 102 looks adaptation has been seted up to the internal surface of nut 2, nut 2 installs on external screw thread 102 through the internal screw thread 201 screw thread, and nut 2 cup joints in the outside of connecting ball 3, the lower part of connecting ball 3 extends nut 2 downwards, the inner bottom wall of the tappet housing 1 is fixedly provided with a small plunger 7 which is coaxial with the small plunger 7, the outer part of the small plunger 7 is sleeved with a large plunger 8 in a sliding manner, a certain gap is reserved between the outer surface of the small plunger 7 and the inner surface of the large plunger 8, the inner part of the tappet housing 1 is fixedly provided with a guide sleeve 5 sleeved outside the large plunger 8, the guide sleeve 5 is sleeved outside the small plunger 7, the lower part of the outer surface of the small plunger 7 is provided with a first oil hole 701 which extends to an inner cavity, the upper surface of the small plunger 7 is provided with a second oil hole 702 which extends to the inner cavity, a spring 9 and a sealing ball 10 are sequentially arranged between the inner top wall of the large plunger 8 and the upper surface of the small plunger 7 from top to bottom, the upper end of the spring 9 is abutted to the inner top wall of the large plunger 8, the sealing ball 10 is abutted to the upper end opening of the second oil hole 702, and the lower end of the spring 9 is sleeved on the upper part of the sealing ball 10.

When the tappet is assembled, the connecting ball 3 can be firstly arranged in the groove 106, the nut 2 is arranged at the end part of the tappet housing 1 in a threaded manner, so that the connecting ball 3 is kept in the groove 106, and during the assembly, screw glue can be coated between the external thread 102 and the internal thread 201 to ensure the assembling stability between the tappet housing 1 and the nut 2, when the valve tappet works normally, a cam in an engine can transmit acting force to a push rod or a valve through repeatedly pressing the connecting ball 3 at the end part of the tappet housing 1, at the moment, the connecting ball 3 is directly contacted with the cam, the connecting ball 3 rolls in the groove 106 under the friction of the cam, so that the original sliding friction between the tappet and the cam is changed into rolling friction, so that the cam and the tappet are prevented from being worn out excessively fast, in this process, engine oil in the engine can enter the tappet housing 1 through the oil inlet 103 and then enter the small plunger 7 through the first oil hole 701, engine oil in the small plunger 7 can enter the second oil hole 702 and the through hole 105 respectively, engine oil entering the second oil hole 702 can enter the large plunger 8 through pushing the sealing ball 10 upwards, after the inner cavity of the large plunger 8 is filled with engine oil, the large plunger 8 can be pushed upwards to enable an air valve or a push rod to be in contact, gapless connection between the tappet and the air valve or the push rod is achieved, engine oil entering the through hole 105 can be directly coated on the outer surface of the connecting ball 3, therefore, when the connecting ball 3 rolls in the groove 106, engine oil can play a lubricating role between the connecting ball 3 and the groove 106, abrasion is further reduced, reliability of the tappet is improved, and probability of failure due to abrasion is reduced to a certain extent.

Example 2

Referring to fig. 1 to 5, the present utility model provides the following technical solutions: the utility model provides a structural assembly of automobile engine valve tappet, the middle part of tappet shell 1 is located and has seted up ring type mounting groove 101 directly over external screw thread 102, ring type filter screen 4 has been cup jointed to the outside of mounting groove 101, a plurality of mounting hole 104 has been seted up to the surface of mounting groove 101, leave the clearance between the surface of the interior inner circle of filter screen 4 and mounting groove 101, a plurality of mounting hole 104 is annular array along the axis of tappet shell 1 and distributes, the inside of a plurality of mounting hole 104 is all pegged graft and is installed the rolling ball 11 of butt in filter screen 4 internal surface, the external opening of oil inlet 103 is located mounting groove 101, and filter screen 4 cup joints in the outer end opening part of oil inlet 103.

When the tappet is used, the annular filter screen 4 is sleeved in the mounting groove 101 in advance, the filter screen 4 can be kept in the mounting groove 101 after the nut 2 is screwed on the tappet housing 1, and meanwhile, the inner ring of the filter screen 4 is contacted with the rolling ball 11, so that the surrounding rolling ball 11 can support the filter screen 4 in the mounting groove 101, the filter screen 4 can be guaranteed to rotate in the mounting groove 101 through the rolling ball 11, the filter screen 4 can play a certain filtering role on the entering engine oil in the process that engine oil enters the inner cavity of the tappet housing 1 through the oil inlet 103, impurities such as metal chips can be effectively prevented from entering the inside of the tappet, the normal operation of the tappet is guaranteed, the service life of the tappet is prolonged to a certain extent, in addition, the filter screen 4 can be enabled to rotate in the mounting groove 101 under the action of shaking force, the impurities located at the position of the filter screen 4 are rotated to one side, meanwhile, the lower end of the filter screen 103 can be prevented from entering the inside of the tappet through the oil inlet 103, and the engine oil inlet is prevented from being blocked smoothly in the process that the tappet reciprocates.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a structure assembly of automobile engine valve tappet, includes inside hollow form tappet shell and nut, its characterized in that: the outer surface of the tappet housing is provided with an oil inlet which extends to the inner cavity, the lower end of the tappet housing is provided with a groove, the inside of the groove is inserted with a connecting ball, the inside of the groove is provided with a through hole which is communicated with the inner cavity of the tappet housing, the lower part of the outer surface of the tappet housing is provided with an external thread, the inner surface of the nut is provided with an internal thread which is matched with the external thread, the nut is arranged on the external thread through the internal thread, the nut is sheathed outside the connecting ball, and the lower part of the connecting ball downwards extends out of the nut;

2. The structural assembly of an automotive engine valve lifter of claim 1, wherein: the tappet shell and the lower end of the nut are both in the shape of a truncated cone, the interior of the nut is hollow with openings at the upper end and the lower end, and the groove is hemispherical.

3. The structural assembly of an automotive engine valve lifter of claim 1, wherein: the inner bottom wall of the tappet housing is fixedly provided with a small plunger coaxial with the tappet housing, the outer part of the small plunger is sleeved and slid with a large plunger, a certain gap is reserved between the outer surface of the small plunger and the inner surface of the large plunger, the inner part of the tappet housing is fixedly provided with a guide sleeve sleeved outside the large plunger, and the guide sleeve is sleeved outside the small plunger.

4. A structural assembly of an automotive engine valve lifter according to claim 3, wherein: the first oil hole extending to the inner cavity is formed in the lower portion of the outer surface of the small plunger, the second oil hole extending to the inner cavity is formed in the upper surface of the small plunger, a spring and a sealing ball are sequentially arranged between the inner top wall of the large plunger and the upper surface of the small plunger from top to bottom, the upper end of the spring is abutted to the inner top wall of the large plunger, the sealing ball is abutted to the upper end opening of the second oil hole, and the lower end of the spring is sleeved on the upper portion of the sealing ball.

5. The structural assembly of an automotive engine valve lifter of claim 1, wherein: gaps are reserved between the inner ring of the filter screen and the outer surface of the mounting groove, and a plurality of mounting holes are distributed in an annular array along the axis of the tappet housing.

6. The structural assembly of an automotive engine valve lifter of claim 1, wherein: the outside opening of oil inlet is located the mounting groove, and the filter screen cup joints in the outer end opening part of oil inlet.