CN216976470U

CN216976470U - Buckle type pressure limiting valve

Info

Publication number: CN216976470U
Application number: CN202220011097.6U
Authority: CN
Inventors: 蒋海军
Original assignee: Suzhou Weifu Sealing Technology Co ltd
Current assignee: Suzhou Weifu Sealing Technology Co ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-07-15
Anticipated expiration: 2032-01-05

Abstract

The utility model relates to the field of engine lubricating systems, in particular to a buckle type pressure limiting valve which comprises a valve body, wherein the valve body comprises a valve cavity with an upward opening, an oil inlet and an oil outlet are formed in the side wall of the valve body, and the oil inlet and the oil outlet are communicated with the valve cavity; the valve cavity is internally provided with a valve plug, a spring and a plunger in sequence from top to bottom, and the valve plug is connected with the side wall of the valve body in a buckling manner. The valve plug is arranged in a buckling mode, and the valve plug has the effects of low processing cost and convenience in installation.

Description

Buckle type pressure limiting valve

Technical Field

The utility model relates to the field of engine lubricating systems, in particular to a buckle type pressure limiting valve.

Background

In the lubricating system of the engine, the oil pump provides enough pressure and flow rate of oil for the lubricating system so as to ensure that all parts are sufficiently lubricated without being damaged. Meanwhile, in order to prevent the oil pressure from being excessively high, a pressure limiting valve is generally provided in the lubrication system. When the oil pressure in the lubricating system exceeds the opening pressure of the pressure limiting valve, the pressure limiting valve is opened, so that the lubricating oil returns to the inlet of the engine oil pump to realize pressure reduction.

The current pressure limiting valve comprises a valve body, wherein a valve cavity with an upward opening is arranged in the valve body, and a valve plug, a spring and a plunger piston are sequentially arranged in the valve cavity from top to bottom. The valve plug is arranged at the opening of the valve cavity and seals the spring and the plunger in the valve cavity, the valve plug is arranged in a threaded screwing mode, external threads are arranged on the outer side wall of the valve plug, internal threads are arranged on the inner wall of the valve cavity, and the valve plug is connected with the valve body through threads. However, the threaded connection type valve plug is complex in machining, high in cost and inconvenient to install.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the buckle type pressure limiting valve, the valve plug is arranged on the valve body through a buckle, the installation is simple and convenient, and the processing cost is lower.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a buckle formula pressure limiting valve, includes the valve body, set up the ascending valve pocket of opening on the valve body, from last valve stopper, spring and plunger set gradually down in the valve pocket, oil inlet and oil-out have been seted up on the lateral wall of valve body, be equipped with first buckle subassembly on the lateral wall of valve stopper, be equipped with second buckle subassembly on the inner wall of valve pocket, first buckle subassembly misplaces with second buckle subassembly and reachs the oblique below of second buckle subassembly, and the valve stopper is through rotatory back, and first buckle subassembly reachs under the second buckle subassembly, gomphosis and butt are on second buckle subassembly under the spring force effect of spring.

Preferably, the number of the first snap assemblies is a pair, and the pair of the first snap assemblies is symmetrically arranged about the central line of the valve plug; the number of the second buckle assemblies is a pair, and the pair of the second buckle assemblies is symmetrically distributed about the center line of the valve cavity.

Preferably, the number of the first buckle assemblies is multiple, and the multiple pairs of the first buckle assemblies are uniformly arranged relative to the central line of the valve plug; the number of the second buckle assemblies is multiple pairs, and the multiple pairs of the second buckle assemblies are uniformly distributed relative to the center line of the valve cavity.

Preferably, the first buckle assembly includes an abutting block and a fitting block provided on the abutting block, and the second buckle assembly includes a fitting projection and a fitting groove provided on the fitting projection, the fitting groove being configured to accommodate the fitting block.

Preferably, the number of the fitting blocks is two, the number of the fitting grooves is two, and the positions of the fitting grooves correspond to the positions of the fitting blocks one to one.

Preferably, the number of the fitting blocks is multiple, the number of the fitting grooves is multiple, and the positions of the fitting grooves correspond to the positions of the fitting blocks one by one.

Preferably, the top of the valve plug is provided with a rotating groove for matching with an external tool to rotate.

Preferably, the number of the rotating grooves is two, and the two rotating grooves are symmetrically arranged about a central line of the valve plug.

Compared with the prior art, the utility model has the advantages that:

(1) according to the utility model, the valve plug is arranged in a buckling mode, and compared with a spiral mounting structure, the buckling structure can be used for mounting or dismounting the valve plug only by pressing and rotating, so that the operation is simple;

(2) according to the valve plug, the first buckle component of the valve plug is arranged into the abutting block and the embedding block, and when the embedding block is embedded in the embedding groove, the rotation of the valve plug can be limited; the axial movement of the valve plug can be limited when the abutting block abuts against the embedded protrusion under the action of the spring, so that the valve plug is fixed.

Drawings

FIG. 1 is an overall schematic view of a snap-in pressure limiting valve according to an embodiment of the present invention;

FIG. 2 is an exploded view of the snap-in pressure limiting valve according to the embodiment of the present invention;

fig. 3 is a sectional view of the snap-in pressure limiting valve according to the embodiment of the present invention.

In the figure: 1. a valve body; 2. valve plugging; 3. a spring; 4. a plunger; 5. a valve cavity; 11. an oil inlet; 12. an oil outlet; 13. a first vent hole; 14. a second vent hole; 15. a seal ring; 21. a butting block; 22. a fitting block; 23. an annular groove; 24. a first groove; 25. rotating the groove; 41. a piston end; 42. a connecting portion; 43. a second groove; 51. an upper cavity; 52. an oil chamber; 53. a lower cavity; 54. a fitting projection; 55. a fitting groove.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The utility model discloses a buckle type pressure limiting valve, which comprises a tubular valve body 1 with an upward opening, wherein a valve plug 2, a spring 3 and a plunger 4 are sequentially arranged in the valve body 1 from top to bottom, the valve plug 2 seals the inner space of the valve body 1 and forms a valve cavity 5, the middle of the valve plug 2 is small, two ends of the valve plug 2 are abutted against the side wall of the valve cavity 5, the inner space of the valve cavity 5 is divided into three spaces from top to bottom, namely an upper cavity 51, an oil cavity 52 and a lower cavity 53. The upper cavity 51 is a space formed between the bottom of the valve plug 2 and the top of the plunger 4, the oil cavity 52 is a space formed between the middle of the plunger 4 and the side wall of the valve cavity 5, and the lower cavity 53 is a space formed between the bottom of the plunger 4 and the side wall of the bottom of the valve cavity 5. An oil inlet 11 and an oil outlet 12 which are arranged side by side up and down are arranged on the side wall of the valve body 1, and when the oil pressure is not high, the top end of the plunger 4 is positioned between the oil inlet 11 and the oil outlet 12 to separate the oil inlet 11 from the oil outlet 12; when the oil pressure in the oil path communicated with the oil inlet 11 is too large, the oil pressure pushes the plunger 4 to move upwards, so that the oil inlet 11 is communicated with the oil outlet 12, and the engine oil flows out from the oil outlet 12 and flows back to the engine oil in the bottom case.

Referring to fig. 2, the valve plug 2 is fastened on the valve body 1, a first fastening component is arranged on the outer side wall of the valve plug 2, and a second fastening component matched with the first fastening component is arranged on the inner wall of the valve cavity 5. Specifically, the valve plug 2 is cylindrical, the first buckle assembly is provided with a pair of protruding abutting blocks 21 on the outer wall of the valve plug 2, the number of the abutting blocks 21 can be more, only two preferable examples are given in the scheme, and it should be noted that the abutting blocks 21 are arranged in pairs, and the paired abutting blocks 21 are symmetrically distributed about the central line of the valve plug 2, so that the stress of the valve plug 2 is balanced when the valve plug is buckled. The top of each abutting block 21 is provided with an engaging block 22, and of course, the number of the engaging blocks 22 may be one or more, and only two preferred examples are given in the present embodiment.

The second snap-fit component is provided with a pair of engaging protrusions 54 on the side wall of the valve cavity 5, the positions of the pair of engaging protrusions 54 are also symmetrically distributed about the center line of the valve cavity 5, each engaging protrusion 54 is provided with a pair of engaging grooves 55, the size of the engaging groove 55 is adapted to the size of the engaging block 22, and of course, the number of the engaging grooves 55 may be more to adapt to the number of the engaging blocks 22. When the valve plug 2 is installed, the abutting block 21 in the valve plug 2 is dislocated with the embedding protrusion 54, the bottom of the valve plug 2 abuts against the spring 3, the valve plug 2 is pressed down, the abutting block 21 and the embedding protrusion 54 on the side wall of the valve plug 2 are pressed to the lower part of the embedding protrusion 54, then the valve plug 2 is rotated, the position of the embedding block 22 corresponds to the position of the embedding groove 55, the embedding block 22 is upwards embedded in the corresponding embedding groove 55 under the action of the spring 3, and the top of the abutting block 21 abuts against the bottom of the corresponding embedding protrusion 54, so that the installation of the valve plug 2 is completed.

Referring to fig. 2 and 3, in order to increase the sealing performance between the valve plug 2 and the valve body 1, an annular groove 23 is formed in the side wall of the valve plug 2, a sealing ring 15 is arranged in the annular groove 23, and the sealing ring 15 abuts against the inner wall of the valve cavity 5 to form sealing. The bottom of the valve plug 2 is provided with a first groove 24 for accommodating the top end of the spring 3 and preventing the spring 3 from shaking. The top of the valve plug 2 is also provided with two rotating grooves 25 which are used for matching with a screwdriver to facilitate a wrench to rotate the valve plug 2, and the two rotating grooves 25 are symmetrically arranged about the central line of the valve plug 2.

Referring to fig. 2, the plunger 4 includes two piston ends 41 and a connecting portion 42 disposed between the two piston ends 41, the two piston ends 41 are connected together by the connecting portion 42, the plunger 4 is an injection molded part made of PPS, and the two piston ends 41 and the connecting member are integrally formed. The two piston ends 41 have the same shape and are different only in the position after mounting, and the piston end 41 in contact with the spring 3 is defined as a first piston end 41 and the other piston end 41 is defined as a second piston end 41. Wherein, all set up second recess 43 on first piston end 41 and the second piston end 41, second recess 43 is used for holding the bottom of spring 3, prevents that spring 3 from rocking.

The connecting parts 42 are in a cross blade shape, so that the effect of reinforcing ribs is achieved, the connecting parts 42 are not attached to the inside of the valve cavity 5, and the risk of blocking the oil outlet 12 or the oil inlet 11 of the connecting parts 42 is avoided. Of course, the shape of the connecting portion 42 is not limited to the cross-blade shape, and may be a cylindrical shape or a square shape.

Referring to fig. 2 and 3, a first vent hole 13 is further formed in the side wall of the valve body 1, the first vent hole 13 is communicated with the upper cavity 51, the first vent hole 13 is located above the oil outlet 12, the first piston end 41 is prevented from moving upwards and blocking the oil outlet 12, the upper cavity 51 forms a closed space, and the air pressure of the upper cavity 51 is too high, so that the plunger 4 cannot continue to move upwards. The bottom of the valve body 1 is provided with the second vent hole 14, and the second vent hole 14 is communicated with the lower cavity 53, so that the lower cavity 53 cannot form a closed space, and the situation that the plunger 4 cannot slide downwards due to overlarge air pressure in the lower cavity 53 is avoided.

The implementation principle of the utility model is as follows: during installation, the plunger 4 and the spring 3 are sequentially placed in the valve cavity 5, the valve plug 2 is rotated by a certain angle, the first clamping component and the second clamping component are staggered, the valve plug 2 is pressed downwards, the spring 3 is compressed, the first clamping component reaches the oblique lower part of the second clamping component, the rotating groove 25 is clamped by a screwdriver or other rotating tools, the valve plug 2 is further rotated, the first clamping component reaches the position right below the second clamping component, the screwdriver or other rotating tools are loosened, the valve plug 2 moves downwards under the action of the spring 3, the embedding block 22 is embedded in the embedding groove 55, the rotating motion of the valve plug 2 is limited, the abutting block 21 abuts against the bottom of the embedding protrusion 54, the upward motion of the valve plug 2 is limited, and the valve plug 2 is fixed. When the valve plug 2 is disassembled, the valve plug 2 can be taken out only by reverse operation, and the operation is simple and convenient.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a buckle formula pressure limiting valve, includes valve body (1), seted up ascending valve pocket (5) of opening on valve body (1), from the top down sets gradually valved cap (2), spring (3) and plunger (4) in valve pocket (5), oil inlet (11) and oil-out (12), its characterized in that have been seted up on the lateral wall of valve body (1): a first buckle component is arranged on the side wall of the valve plug (2), and a second buckle component is arranged on the inner wall of the valve cavity (5); the first buckle component and the second buckle component are staggered and reach the oblique lower side of the second buckle component, after the valve plug (2) rotates, the first buckle component reaches the position right below the second buckle component, and is embedded and abutted against the second buckle component under the elastic force action of the spring (3).

2. The snap-on pressure limiting valve of claim 1, wherein: the number of the first buckle assemblies is a pair, and the pair of the first buckle assemblies is symmetrically arranged about the central line of the valve plug (2); the number of the second snap assemblies is a pair, and the pair of the second snap assemblies is symmetrically distributed about the center line of the valve cavity (5).

3. The snap-on pressure limiting valve of claim 1, wherein: the number of the first buckle assemblies is multiple, and the multiple pairs of the first buckle assemblies are uniformly arranged relative to the central line of the valve plug (2); the number of the second snap assemblies is a plurality of pairs, and the plurality of pairs of second snap assemblies are uniformly distributed about the center line of the valve cavity (5).

4. The snap-on pressure limiting valve of claim 2, wherein: the first buckle component comprises a butt joint block (21) and a mosaic block (22) arranged on the butt joint block (21), the second buckle component comprises a mosaic protrusion (54) and a mosaic groove (55) arranged on the mosaic protrusion (54), and the mosaic groove (55) is used for accommodating the mosaic block (22).

5. The snap-on pressure limiting valve of claim 4, wherein: the number of the tabling blocks (22) is two, the number of the tabling grooves (55) is two, and the positions of the tabling grooves (55) correspond to the positions of the tabling blocks (22) one by one.

6. The snap-on pressure limiting valve of claim 4, wherein: the number of the embedding blocks (22) is multiple, the number of the embedding grooves (55) is multiple, and the positions of the embedding grooves (55) correspond to the positions of the embedding blocks (22) one by one.

7. The snap-on pressure limiting valve of claim 1, wherein: the top of the valve plug (2) is provided with a rotating groove (25) used for being matched with an external tool to rotate.

8. The snap-on pressure limiting valve of claim 7, wherein: the number of the rotating grooves (25) is two, and the two rotating grooves (25) are symmetrically arranged around the central line of the valve plug (2).