CN214698294U

CN214698294U - Plunger of plunger pump, plunger spring seat and plunger assembly

Info

Publication number: CN214698294U
Application number: CN202022591228.6U
Authority: CN
Inventors: 朱沛福
Original assignee: Individual
Current assignee: Zheng Jianliang
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-11-12
Anticipated expiration: 2030-11-10

Abstract

The utility model relates to a plunger pump plunger, plunger spring holder and plunger subassembly. In the prior art, the phenomena of difficult assembly, low efficiency, easy falling off, easy cracking and the like exist. The utility model discloses a plunger assembly, including plunger and plunger spring seat, offered the blind hole at the plunger body one end of plunger, the stopper of plunger includes guide body and inflation body, the external diameter of guide body is less than or slightly is lighter than the internal diameter of plunger body blind hole, the external diameter of the inflation body of plunger slightly is greater than the internal diameter of plunger body blind hole, the guide body of stopper inserts in the blind hole of plunger body, then the inflation body is stuffed into the blind hole, make the blind hole end that the plunger body was provided with the blind hole slightly expand; the spring guide body of the plunger spring seat is provided with a plunger assembly hole, the blind hole end of the plunger is inserted into the plunger assembly hole of the plunger spring seat, and the outer diameter of the blind hole end of the plunger body is slightly larger than the inner diameter of the plunger assembly hole after the blind hole end of the plunger body expands. The utility model discloses processing technology is simple convenient, and is fixed very firm, has improved the stability of producing the product performance.

Description

Plunger of plunger pump, plunger spring seat and plunger assembly

Technical Field

The utility model relates to a plunger pump, specifically speaking, have involved plunger, plunger spring holder and the plunger subassembly that makes among the plunger pump, especially relate to the institutional advancement of plunger, plunger spring holder.

Background

In the high pressure washer industry, a plunger pump is one of the important power parts of the washer, wherein a plunger assembly is a very important part of the plunger pump, and how a plunger is assembled on a spring seat is one of the technologies which are always improved in the industry. In the prior art, the plunger spring seat is usually a net-shaped body, and the problems of difficult assembly and low efficiency exist when the plunger is installed. Particularly, after the assembly is finished, the phenomena of falling, cracking and the like are easy to occur, so that the performance of the product is unstable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a not enough to prior art exists, improve the structure of plunger, plunger spring holder, plunger subassembly, improve the assembly method between plunger and the spring holder, improve assembly efficiency and produce the stability of product performance.

According to the above object, the utility model provides a plunger, including a plunger body the blind hole has been seted up to plunger body one end, the plunger still includes a stopper, the stopper includes the guide body and the inflation body, the external diameter of the guide body is less than or slightly less than the plunger body the internal diameter of blind hole, the external diameter of the inflation body slightly is greater than the plunger body the internal diameter of blind hole, the stopper earlier by the guide body inserts in the blind hole of the plunger body, then the inflation body is filled in the blind hole, make the plunger body is provided with the blind hole end of blind hole and slightly expands.

In the plunger, the guide body of the plug is connected with the expansion body in a bevel transition mode.

In the plunger described above, the transition slope is a flat surface.

In the plunger, the transition slope is a cambered surface.

In the plunger, the plunger is formed in one step by adopting a cold extrusion process.

The utility model also provides a plunger spring holder, including the spring director, the spring director has the plunger pilot hole, the plunger pilot hole is the blind hole for install the plunger.

In the plunger spring seat described above, the plunger spring seat has a working surface, and the working surface is a spherical surface.

In the plunger spring seat, the plunger spring seat is formed in one step by adopting a cold extrusion process.

The utility model also provides a plunger subassembly, including plunger and plunger spring holder, the plunger adopts as above-mentioned plunger, the plunger spring holder adopts as above-mentioned plunger, the blind hole end of plunger inserts in the plunger pilot hole of plunger spring holder, its external diameter slightly is greater than after the blind hole end inflation of the plunger body the internal diameter of plunger pilot hole.

The present invention will be described in detail below with reference to specific embodiments.

Drawings

Fig. 1 shows a schematic structural view of a plunger pump according to the present invention;

fig. 2 shows a schematic structural view of the plunger spring seat of the present invention;

fig. 3A-3C show a schematic view of the assembly process of the plunger and spring seat.

[ notation ] to show

Plunger body 1

Blind hole end 11

Blind hole 12

Stopper 2

Guide body 21

Expansion body 22

Transition surface 23

Plunger spring seat 3

Spring guide 31

Plunger fitting hole 32

Plunger working surface 33

Detailed Description

As shown in fig. 1, fig. 1 shows a schematic structural diagram of a plunger pump according to the present invention. As can be seen from the figure, the plunger comprises a plunger body 1 and a stopper 2.

Plunger body 1 is a cylinder, has seted up blind hole 12 in the one end of cylinder the utility model discloses in, the one end of seting up blind hole 12 with plunger 1 is called blind hole end 11. The depth of the blind hole 12 may be determined as desired. In this embodiment, the depth of the blind hole 12 is close to the length of the plunger body 1, while in other embodiments the depth of the blind hole 12 may be less than half the length of the plunger body 1.

The inner wall of the blind hole 12 is generally cylindrical, and in a special case, the inner wall of the blind hole 12 may have other shapes such as a square cylinder. Preferably, the plunger 1 can be formed in one step by a cold extrusion process.

Stopper 2 includes guide body 21 and expansion body 22. The outer diameter of the guide body 21 is smaller or slightly smaller than the inner diameter of the blind hole 12 of the plunger body 1, and the outer diameter of the expansion body 22 is slightly larger than the inner diameter of the blind hole 12 of the plunger body 1. The plug 2 is inserted into the blind hole 12 of the plunger body 1 by the guide body 21, and then the expansion body 22 is forcibly inserted into the blind hole 12. Since the outer diameter of the expansion body 22 is larger than the inner diameter of the blind hole 12, the expansion body 22 will press against the wall of the blind hole of the plunger body 1, thereby causing the blind hole end 11 of the plunger body 1 to expand slightly outwards. The value of the outer diameter of expansion body 22 can be determined according to actual needs, and the basic condition is that the outer diameter is slightly larger than the inner diameter of blind hole 12.

With continued reference to fig. 1, the transition between the guiding body of the stopper and the expansion body may take a number of forms, such as other than stepped, beveled, etc. In the embodiment of fig. 1, the transition surface 23 is shown as a bevel, the transition bevel being a flat surface. Of course, the transition may also be performed in a cambered surface manner.

Referring to fig. 2, fig. 2 shows a schematic structural diagram of the plunger spring seat 3 of the present invention. Plunger spring seat 3 includes spring guide 31, and spring guide 31 still is provided with plunger pilot hole 32, and plunger pilot hole 32 is the blind hole for the installation plunger. The end of the spring guide 31 opposite the blind hole is a plunger face 33, which may be flat or may have other shapes, such as spherical.

Similar to the way of processing the plunger 1, it is preferable to use a cold extrusion process for one-step molding.

Please refer to fig. 3A-3C, which are schematic views illustrating the assembling process of the plunger and the spring seat. As shown in fig. 3A, in the initial state, the plunger body 1, the stopper 2, and the spring seat 3 are single parts. First, the guide body 21 of the plug 2 is inserted into the blind hole 12 of the plunger body 1, and the plunger fitting hole 32 of the plunger spring seat 3 is aligned with the expansion body 22 of the plug 2, resulting in the state shown in fig. 3B.

Then, pressure is applied to the working surface 33 of the plunger spring seat 3, and the blind hole end 11 of the plunger body 1 is pressed into the plunger fitting hole 32 of the plunger spring seat 3.

Finally, the pressing is continued on the working surface 33 of the plunger spring seat 3, the expansion body 22 of the plug 2 is inserted into the blind hole 12 of the plunger body 1, the outer diameter of the expansion body 22 is slightly larger than the inner diameter of the blind hole 12 of the plunger body 1, so that the blind hole end 11 of the plunger body 1 is expanded outwards, and the plunger body 1 is fixed in the plunger fitting hole 32 of the plunger spring seat 3 due to the expansion (as shown in fig. 3C).

In an actual assembling operation, it is possible to use tooling equipment, for example, to put the plunger body 1 into which the guide body 21 of the stopper 2 has been inserted into a corresponding tooling, and also to put the spring seat 3 into a corresponding tooling, so that the plunger assembling hole 32 of the plunger spring seat 3 is aligned with the expansion body 22 of the stopper 2. Then, the tool presses the working surface 33 of the plunger spring seat 3, and the blind hole end of the plunger body is pressed into the plunger fitting hole of the plunger spring seat.

As described above, the utility model discloses in, the blind hole end 11 that utilizes the plunger body 1 produces the inflation and is together fixed with the plunger pilot hole 32 of spring holder 3, and not only processing technology is simple convenient, and is fixed very firm moreover, can not produce the obscission, has improved the stability of producing the product performance greatly.

Claims

1. The plunger of the plunger pump comprises a plunger body and is characterized in that a blind hole is formed in one end of the plunger body, the plunger further comprises a plug, the plug comprises a guide body and an expansion body, the outer diameter of the guide body is smaller than or slightly smaller than the inner diameter of the blind hole of the plunger body, the outer diameter of the expansion body is slightly larger than the inner diameter of the blind hole of the plunger body, the plug is firstly inserted into the blind hole of the plunger body through the guide body, and then the expansion body is plugged into the blind hole, so that the blind hole end, provided with the blind hole, of the plunger body is slightly expanded.

2. The plunger of claim 1, wherein the stopper guide and the expansion body are connected by a ramped transition.

3. The plunger of claim 2, wherein said ramp is planar.

4. The plunger of claim 2, wherein said ramp is a curved surface.

5. Plunger for a plunger pump according to any of claims 1-4, characterised in that the plunger is formed in one piece by means of a cold extrusion process.

6. A plunger spring seat for use with a plunger of a plunger pump according to claim 1, comprising a spring guide body, wherein the spring guide body has a plunger fitting hole, and the plunger fitting hole is a blind hole for receiving the plunger according to claim 1.

7. The plunger spring seat of claim 6 wherein said plunger spring seat has a working surface that is spherical.

8. The plunger spring seat of claim 6, wherein said plunger spring seat is formed in one piece using a cold extrusion process.

9. A plunger assembly comprising a plunger pump plunger and a plunger spring seat, wherein the plunger pump plunger is the plunger pump plunger claimed in any one of claims 1 to 5, the plunger spring seat is the plunger spring seat claimed in any one of claims 6 to 8, the blind hole end of the plunger pump plunger is inserted into the plunger fitting hole of the plunger spring seat, and the blind hole end of the plunger pump plunger is expanded to have an outer diameter slightly larger than the inner diameter of the plunger fitting hole.