CN213116411U

CN213116411U - Hydraulic tappet

Info

Publication number: CN213116411U
Application number: CN202021551062.9U
Authority: CN
Inventors: 徐维超; 杜茂
Original assignee: Mianyang Huabo Seiko Machinery Co ltd
Current assignee: Mianyang Huabo Seiko Machinery Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-05-04
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a hydraulic tappet, include: the device comprises a tappet body, a plunger and a one-way valve arranged between the tappet body and the plunger; the plunger is characterized in that a push rod support matched with an external push rod is arranged in the tappet body, the upper part of the plunger is provided with a mounting groove matched with the push rod support, the bottom of the plunger is provided with a circular intercepting piece, the edge of the intercepting piece is provided with a fixing part at the position matched with the mounting groove, at least one annular elastic bending part is arranged at the position adjacent to the fixing part, and the intercepting piece is provided with a plurality of arc-shaped structures or oil passing grooves radiating from the center at the position matched with a fourth oil inlet hole on the push rod support. The utility model discloses a hydraulic tappet is injectd through the structure of damming piece for have quantitative deformation space under the effect of oil pressure, can carry lubricating oil to fourth inlet port ration through the oil groove of crossing of center department, and then guarantee that the inside oil pressure stability of hydraulic tappet is better.

Description

Hydraulic tappet

Technical Field

The utility model relates to a hydraulic tappet. More specifically, the present invention relates to a hydraulic tappet for use in a piston engine.

Background

In the piston engine, a hydraulic tappet is arranged between a cam and a valve push rod, so that the valve clearance can be automatically compensated, relevant parts for adjusting the valve clearance are eliminated, the structure is greatly simplified, and noise and impact caused by the valve clearance are eliminated.

In actual use, the hydraulic tappet is generally provided with an intercepting piece (breathing piece), so that lubricating oil can be provided for a spherical pit of the push rod base through an annular oil groove on the breathing piece, air in the lubricating oil in a plunger oil cavity can be discharged from the annular oil groove, however, the annular oil groove of a large-piece structure on the intercepting piece is arranged, so that the lubricating oil entering the plunger cavity is continuously seeped out, the pressure in the plunger cavity is consumed, the action effect of the hydraulic tappet is weakened, meanwhile, the intercepting piece is not provided with elastic telescopic allowance in space, so that the lubricating oil is insufficient in the process of applying pressure to the intercepting piece, and the oil outlet effect is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.

To achieve these objects and other advantages in accordance with the purpose of the invention, a hydraulic tappet is provided, including: the device comprises a tappet body, a plunger and a one-way valve arranged between the tappet body and the plunger;

the plunger is internally provided with a cavity which is matched with the first oil inlet to contain lubricating oil, and the cavity is communicated with an accommodating cavity of the one-way valve through a third oil inlet;

a push rod support matched with an external push rod is arranged in the tappet body, an installation groove matched with the push rod support is formed in the upper portion of the plunger, a circular intercepting piece is arranged at the bottom of the plunger, a fixing portion is arranged at the edge of the intercepting piece at a position matched with the installation groove, at least one annular elastic bending portion is arranged at a position adjacent to the fixing portion, and a plurality of oil passing grooves which are of arc structures or radiate from the center are formed in the intercepting piece at a position matched with a fourth oil inlet hole in the push rod support;

the push rod support is further limited in the tappet body through a clamping spring matched with the push rod support.

Preferably, the check valve is configured to include: the steel ball and the spring seat are covered outside the steel ball;

a compression spring is arranged between the steel ball and the spring seat;

the spring seat is connected with the accommodating cavity through a matched reset spring;

the tappet body is provided with a fixed groove matched with the return spring.

Preferably, the cavity is provided with a tapered oil limiting part at one side matched with the third oil inlet hole;

the first oil inlet hole is configured to be an inclined hole, the second oil inlet hole and the first oil inlet hole are spatially configured to be arranged in a staggered mode, and oil grooves for communicating the first oil inlet hole with the second oil inlet hole are formed in the plunger and/or the tappet body.

Preferably, the mounting groove is provided with an annular limiting groove at a position matched with the intercepting piece, and the intercepting piece is provided with an annular limiting part matched with the limiting groove.

Preferably, one end of the tappet body, which is far away from the push rod support, is provided with a roller assembly.

The utility model discloses at least, include following beneficial effect: one of which, the utility model discloses a structure of damming piece is injectd for have quantitative deformation space under the effect of oil pressure, can carry lubricating oil to the fourth inlet port ration through the oil groove of crossing of center department, and then guarantee that the inside oil pressure stability of hydraulic tappet is better.

Secondly, the utility model discloses a set up the annular of fixed usefulness on the piece that dams and limit the portion for its and the plunger between the stability of being connected is better, and the restrictive in work is better, does benefit to the stability of equipment operation.

Thirdly, the utility model discloses a carry out the improvement to the damming piece for it is when the oil pressure is lower in the plunger, does not basically export to push rod base fuel feeding, can have when its pressure is enough big, makes the damming piece produce quantitative deformation through the extrusion, just has lubricating oil to the output of push rod base, and the effectual lubricated volume of oozing out to the push rod base in the plunger cavity of having controlled reduces the consumption of plunger intracavity pressure, guarantees that the effect stability of hydraulic tappet accords with operation requirement.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural view of a hydraulic tappet according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a shutoff piece according to an embodiment of the present invention;

FIG. 3 is a schematic top view of the structure of FIG. 2;

fig. 4 is a schematic top view of another embodiment of the cut-off piece of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It should be noted that in the description of the present invention, the terms indicating the orientation or the positional relationship are based on the orientation or the positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected," may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.

Fig. 1-4 show a hydraulic tappet realisation according to the present invention, comprising: the device comprises a tappet body 1, a plunger 2 and a one-way valve 3 arranged between the tappet body and the plunger;

the plunger is provided with a first oil inlet 4 and a second oil inlet 5 on the side walls of the plunger body and the tappet body respectively, a cavity 6 which is matched with the first oil inlet to contain lubricating oil is arranged inside the plunger, and the cavity is communicated with an accommodating cavity 8 where the one-way valve is located through a third oil inlet 7;

the tappet body is internally provided with a push rod support 9 matched with an external push rod, the upper part of the plunger is provided with a mounting groove (not shown) matched with the push rod support, the bottom of the plunger is provided with a circular intercepting piece 10, the edge of the plunger is provided with a fixed part 11 at the position matched with the mounting groove, the function of the intercepting piece is that the intercepting piece is matched with the plunger and the push rod support to limit the space position of the intercepting piece, the position adjacent to the fixed part is provided with at least one annular elastic bending part 12, the function of the intercepting piece is that the intercepting piece is provided with the elastic bending part or the wave-shaped elastic part, so that the intercepting piece can have the deformation capability when being pressed, can play an elastic support between the plunger and the push rod support, and can guide the intercepting piece to carry out quantitative deformation to the center when the middle part of the intercepting piece is subjected to, the oil conveying effect is ensured, so that the arc-shaped structure or the open oil passing groove in the structure can be an opening cut by the cut-off piece, certain structural stability is kept when the cut-off piece is not pressed, oil leakage is prevented, and the oil pressure stability in the hydraulic plunger is ensured, the cut-off piece is provided with a plurality of oil passing grooves 13 which are arc-shaped structures or radiate from the center on the position matched with the fourth oil inlet hole on the push rod support, the middle part of the elastic metal cut-off piece is provided with a plurality of openings cut by radiation, when the cut-off piece is not pressed or pressed, the surface of the cut-off piece keeps certain stability, when the pressure is overlarge, the center of the cut-off piece is upwards pushed, the center of the gasket is opened due to the opening effect and can be used as an oil drainage groove, and the material has elastic acting force, so the cut-off piece can be in the original state when the pressure is reduced, in actual work, when the oil pressure in the, the oil drainage groove is in a relatively sealed state, lubricating oil is not conveyed to the push rod base, when the oil pressure in the plunger is too high, the center of the intercepting piece is jacked upwards, the oil drainage groove is opened by the metal pad under the action of elastic pressing force, and the lubricating oil is communicated to the arc-shaped concave side wall of the push rod base from the oil drainage groove to a fourth oil inlet hole in the push rod support, so that the pressure in the cavity is adjusted, and the bottom of the push rod is lubricated;

the push rod support is limited in the tappet body through the snap spring 14 which is matched with the push rod support, the push rod support is used for limiting the space position of the plunger through the snap spring, the stability of the structural connection with the tappet body is better, in the actual working process of the scheme, lubricating oil enters the tappet body through the first oil inlet hole formed in the tappet body and then enters the cavity in the plunger through the second oil inlet hole formed in the plunger body, the pressure is increased along with the increase of the oil amount entering the cavity in the plunger, so that the one-way valve is pushed to move downwards, and the lubricating oil enters the accommodating cavity at the bottom of the tappet body through the gap between the plunger and the one-way valve; along with the more and more oil mass that gets into tappet body bottom holding intracavity, form pressure, promote the plunger upward movement, accomplish the motion of push rod.

In another example, as shown in fig. 1, the check valve is configured to include: a steel ball 16 and a spring seat 17 covered outside the steel ball 16;

a compression spring 18 is arranged between the steel ball and the spring seat;

the spring seat is connected with the accommodating cavity through a matched return spring 19;

in the structure, when the oil pressure in the cavity is too high, the pressure is transmitted to the steel ball, so that the compression spring, the spring seat and the return spring in the one-way valve are pushed to move downwards together, and the lubricating oil enters the bottom of the tappet body through a gap between the plunger and the one-way valve to form a high-pressure cavity in the tappet body.

In another example, as shown in fig. 1, a tapered oil limiting portion 20 is disposed at a side of the cavity that is engaged with the third oil inlet hole, and is used for adjusting oil pressure entering the accommodating cavity, so that an acting force applied to the check valve by the tapered oil limiting portion has a better effect, and the structural operation stability of the device is better;

the first oil inlet hole is configured to be an inclined hole, the arrangement of the inclined hole enables the oil suction force in the oil inlet process to be improved compared with a vertical hole in the prior art, so that oil can be continuously supplied to the oil groove in the use process, the second oil inlet hole and the first oil inlet hole are spatially configured to be arranged in a staggered mode, the oil groove 21 for communicating the first oil inlet hole with the second oil inlet hole is formed in the plunger and/or the tappet body, pre-storage in the oil inlet process can be achieved through the oil groove in the structure, so that continuous oil inlet of the second oil inlet hole can be achieved, the oil groove can be obtained by means of an annular groove formed in the plunger or the tappet body and staggered in the space, and oil pressure entering the cavity is pressurized through a stepped limiting structure of an internal structure.

In another embodiment, the installation groove is internally provided with an annular limiting groove at the position matched with the intercepting piece, the intercepting piece is provided with an annular limiting part matched with the limiting groove, and in the structure, the intercepting piece is provided with the annular limiting part for fixing, and the plunger is provided with the annular groove matched with the limiting part, so that the connection stability between the intercepting piece and the plunger is better, the limitation in operation is better, and the stability of the operation of the device is facilitated.

In another embodiment, the tappet body is provided with a roller assembly 15 at the end far away from the push rod support, the roller assembly comprises a connecting shaft matched with the tappet body and a roller rotatably arranged on the connecting shaft, and the tappet is provided with a U-shaped groove matched with the connecting shaft.

The above embodiments are merely illustrative of a preferred embodiment, but not limiting. When the utility model is implemented, the proper replacement and/or modification can be carried out according to the requirements of users.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A hydraulic tappet characterized by comprising: the device comprises a tappet body, a plunger and a one-way valve arranged between the tappet body and the plunger;

2. The hydraulic lifter of claim 1, wherein the check valve is configured to include: the steel ball and the spring seat are covered outside the steel ball;

a compression spring is arranged between the steel ball and the spring seat;

the tappet body is provided with a fixed groove matched with the return spring.

3. The hydraulic tappet of claim 2, wherein the cavity is provided with a tapered oil restriction at a side that is engaged with the third oil feed hole;

4. The hydraulic tappet according to claim 3, wherein the mounting groove is provided with an annular limiting groove at a position where the intercepting piece is engaged, and the intercepting piece is provided with an annular limiting portion engaged with the limiting groove.

5. The hydraulic lifter of claim 4, wherein a roller assembly is disposed at an end of the lifter body distal from the pushrod support.