CN219492555U

CN219492555U - Spring pad and diesel pump

Info

Publication number: CN219492555U
Application number: CN202320147160.3U
Authority: CN
Inventors: 王彬; 崔阳; 马君; 林明
Original assignee: Borgwarner Fuel Systems Yantai Co ltd
Current assignee: Borgwarner Fuel Systems Yantai Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-08-08
Anticipated expiration: 2033-01-31

Abstract

The utility model relates to a spring pad and a diesel pump, wherein the spring pad comprises a positioning step and a bulge arranged on the positioning step, the positioning step is used for supporting a spring, a first through hole and a second through hole which are communicated are arranged on the bulge, the size of the first through hole is larger than that of a stop table at the lower end of a plunger, the size of the second through hole is smaller than that of the stop table at the lower end of the plunger, the second through hole is positioned at the center of the bulge, and a limiting step used for being clamped with the stop table is arranged at the lower end of the second through hole. The stop table at the lower end of the plunger passes through the first through hole and moves to the second through hole, so that the stop table is clamped on the limit step at the lower end of the second through hole, the connection between the plunger and the spring pad is realized, the problems of high assembly difficulty and long assembly time caused by press fitting of the plunger and the spring pad are solved, and the assembly difficulty is reduced; through protruding and location step cooperation, realize the spacing to spring axial and radial, simplified assembly process greatly, the cost is reduced.

Description

Spring pad and diesel pump

Technical Field

The utility model relates to the technical field of diesel pumps, in particular to a spring pad and a diesel pump.

Background

Diesel pumps typically include a pump head, a plunger, a spring pad, a cam shaft, a spring for plunger return, and the like. The plunger is installed in the pump head cavity, and the lower end is connected with the spring pad. The spring is sleeved at the lower end of the pump head, the upper end of the spring is propped against the thrust surface of the pump head, and the lower end of the spring is propped against the spring pad. During operation, the plunger reciprocates in the plunger cavity of the pump head along with the cam shaft, so that diesel oil in the pump body is pressurized to form high-pressure oil and is sequentially conveyed to the oil rail and the oil sprayer, and normal operation of the engine is ensured.

In the prior art, the plunger is connected with the spring pad in an interference press-fitting mode, parameters such as pressing force and the like need to be controlled in the press-fitting process, the assembly difficulty is high, the assembly time is long, and the assembly cost is increased.

Disclosure of Invention

The utility model provides a spring pad and a diesel pump for solving the technical problems.

The technical scheme for solving the technical problems is as follows: the utility model provides a spring pad, is in including location step and setting protruding on the location step, the location step is used for supporting the spring, be equipped with first and the through-hole second of intercommunication on protruding, the size of first through-hole is greater than the size of the plunger lower extreme end platform, the size of second through-hole is less than the size of the plunger lower extreme end platform, the through-hole second is located bellied center department, the lower extreme of through-hole second is equipped with and is used for the joint the spacing step of end platform.

The beneficial effects of the utility model are as follows: the stop table at the lower end of the plunger passes through the first through hole and moves to the second through hole, so that the stop table is clamped on the limit step at the lower end of the second through hole, the connection between the plunger and the spring pad is realized, the problems of high assembly difficulty and long assembly time caused by press fitting of the plunger and the spring pad are solved, and the assembly difficulty is reduced; through protruding and location step cooperation, realize the spacing to spring axial and radial, simplified assembly process greatly, the cost is reduced.

On the basis of the technical scheme, the utility model can also make the following improvements for the technical scheme in order to achieve the convenience of use and the stability of equipment:

further, the lower end face of the positioning step is provided with a chute.

The technical scheme has the advantages that the weight of the whole spring pad can be reduced, the plunger can conveniently reciprocate up and down, meanwhile, the chute forms an avoidance area, so that the plunger is in close contact with the tappet body, and normal movement of the plunger is guaranteed.

Further, the diameter of the positioning step is larger than the outer diameter of the spring, and the diameter of the protrusion is smaller than the inner diameter of the spring.

The adoption of the technical scheme has the beneficial effects that the spring support and radial limiting function are guaranteed, so that the spring can normally stretch and retract, and clamping stagnation or deflection is avoided.

Further, the height of the limiting step is smaller than that of the stopping table.

The technical scheme has the beneficial effects that the plunger is in normal contact with the tappet body, so that the plunger is ensured to normally move under the action of the tappet body, and the weight of the spring pad is reduced.

Further, the lower end of the plunger is provided with a waist-shaped part, and the waist-shaped part is connected with the stopping table.

The technical scheme has the beneficial effects that the difficulty in assembling between the plunger and the spring pad is reduced, the sizes of the first through hole and the second through hole are reduced, and the spring pad is ensured to be normally clamped on the stop table at the lower end of the plunger.

The utility model also discloses a diesel pump, which comprises the spring pad, a plunger, a spring, a tappet body, a shell and a pump head, wherein the plunger, the spring and the tappet body are arranged in the shell, the pump head is arranged on the shell, one end of the plunger is arranged in the pump head in a sliding manner, the other end of the plunger is clamped in the limiting step through a stop table, the spring pad is arranged in a containing groove on the tappet body, the stop table is in contact with the tappet body, the spring is sleeved on the pump head, and the lower end of the spring is propped against the positioning step.

The beneficial effects of the utility model are as follows: the plunger is clamped in the spring pad, so that the installation difficulty of the plunger and the spring pad is reduced, the overall assembly efficiency of the diesel pump is improved, and the assembly cost is reduced; because the clearance between the plunger and the through hole in the pump head and the clearance between the spring pad and the accommodating groove of the tappet body are smaller, the radial limit of the plunger and the spring pad is realized, and the plunger and the spring pad cannot deviate from each other in the up-and-down movement process; the protruding structure of the spring pad and the inner wall of the accommodating groove of the tappet body are matched, so that the spring is radially limited, deflection can not occur in the compression and return movement process, and the normal work of the diesel pump is ensured.

Drawings

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

FIG. 2 is a schematic cross-sectional view of a spring pad of the present utility model;

fig. 3 is a schematic cross-sectional view of the diesel pump of the present utility model.

The reference numerals are recorded as follows: 1. a spring pad; 101. a first through hole; 102. a second through hole; 103. a limit step; 104. a chute; 105. positioning the step; 106. a protrusion; 2. a plunger; 201. stopping a table; 3. a spring; 4. a tappet body; 5. a housing; 6. a pump head.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

As shown in fig. 1 to 2, the utility model discloses a spring pad, which comprises a positioning step 105 and a protrusion 106 arranged on the positioning step 105, wherein the positioning step 105 is used for supporting a spring 3, a first through hole 101 and a second through hole 102 which are communicated are arranged on the protrusion 106, the size of the first through hole 101 is larger than that of a stop table 201 at the lower end of a plunger 2, the size of the second through hole 102 is smaller than that of the stop table 201 at the lower end of the plunger 2, the second through hole 102 is positioned at the center of the protrusion 106, and a limit step 103 for clamping the stop table 201 is arranged at the lower end of the second through hole 102.

In this embodiment, the first through hole 101 and the second through hole 102 are circular holes, so that the processing is convenient, and the processing difficulty is reduced.

In alternative embodiments, the first through hole 101 may be a through hole with another shape, such as a rectangular hole or an elliptical hole.

During installation, the stop 201 at the lower end of the plunger 2 passes through the first through hole 101 and moves towards the second through hole 102, so that the stop 201 is clamped on the limit step 103 at the lower end of the second through hole 102, and the connection between the plunger 2 and the spring pad 1 is realized. The through hole II 102 is arranged in the center, so that the spring pad 1 can be prevented from tilting when the plunger 2 moves, the spring pad 1 and the plunger 2 are ensured to be stably connected, and the supporting effect on the spring 3 is ensured.

The lower end face of the positioning step 105 is provided with a chute 104. The chute 104 is a conical groove inclined towards the center of the spring pad 1, so that the overall weight of the spring pad 1 can be reduced, the plunger 2 can conveniently reciprocate up and down, and meanwhile, the chute 104 forms an avoidance area, so that the plunger 2 is in close contact with the tappet body 4, and the plunger 2 is ensured to normally move.

The diameter of the positioning step 105 is larger than the outer diameter of the spring 3, and the diameter of the protrusion 106 is smaller than the inner diameter of the spring 3. The positioning step 105 ensures the supporting function of the spring 3, and the protrusion 106 realizes radial limit of the spring 3, so that the spring 3 stretches normally and avoids clamping stagnation or deflection.

The height of the limit step 103 is smaller than that of the stop 201. The plunger 2 is in normal contact with the tappet body 4, so that the plunger 2 is ensured to normally move under the action of the tappet body 4, and the weight of the spring pad 1 is reduced.

The lower end of the plunger 2 is provided with a waist-shaped part, and the waist-shaped part is connected with the stop 201. The waist-shaped part and the plunger 2 are in smooth transition, the waist-shaped part structure can reduce the difficulty in assembly between the plunger 2 and the spring pad 1, reduce the sizes of the first through hole 101 and the second through hole 102, and ensure that the spring pad 1 is normally clamped on the stop table 201 at the lower end of the plunger 2.

As shown in fig. 3, a diesel pump comprises the spring pad 1, the diesel pump further comprises a plunger 2, a spring 3, a tappet body 4, a shell 5 and a pump head 6, wherein the plunger 2, the spring 3 and the tappet body 4 are arranged in the shell 5, the pump head 6 is installed on the shell 5, one end of the plunger 2 is slidably arranged in the pump head 6, the other end of the plunger 2 is clamped in a limit step 103 of the spring pad 1 through a stop 201, the spring pad 1 is arranged in a containing groove on the tappet body 4, the stop 201 is in contact with the tappet body 4, the tappet body 4 is connected with a cam shaft, and when the cam shaft rotates, the tappet body 4 is driven to move up and down, so that the plunger 2 is driven to move up and down, the spring 3 is sleeved on the pump head 6, and the lower end of the spring 3 is propped against the locating step 105.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a spring pad, its characterized in that, is in including location step (105) and setting protruding (106) on location step (105), location step (105) are used for supporting spring (3), be equipped with through-hole one (101) and through-hole two (102) of intercommunication on protruding (106), the size of through-hole one (101) is greater than the size of plunger (2) lower extreme end stop table (201), the size of through-hole two (102) is less than the size of stopping table (201), through-hole two (102) are located the center department of protruding (106), the lower extreme of through-hole two (102) is equipped with and is used for the joint stop table (201) spacing step (103).

2. Spring mattress according to claim 1, characterized in that the lower end face of the positioning step (105) is provided with a chute (104).

3. Spring mattress according to claim 1, characterized in that the diameter of the positioning step (105) is larger than the outer diameter of the spring (3), the diameter of the protrusion (106) being smaller than the inner diameter of the spring (3).

4. Spring mattress according to claim 1, characterized in that the depth of the limit step (103) is smaller than the height of the stop table (201).

5. Spring mattress according to claim 1, characterized in that the lower end of the plunger (2) is provided with a kidney-shaped part, which kidney-shaped part is connected with the stop table (201).

6. The diesel pump is characterized by comprising the spring pad according to any one of claims 1 to 5, and further comprising a plunger (2), a spring (3), a tappet body (4), a shell (5) and a pump head (6), wherein the plunger (2), the spring (3) and the tappet body (4) are arranged in the shell (5), the pump head (6) is arranged on the shell (5), one end of the plunger (2) is slidably arranged in the pump head (6), the other end of the plunger is clamped in the limiting step (103) through a stop table (201), the spring pad (1) is arranged in a containing groove on the tappet body (4), the stop table (201) is in contact with the tappet body (4), the spring (3) is sleeved on the pump head (6), and the lower end of the spring (3) is abutted against the positioning step (105).