Mounting structure for pressure-limiting valve of oil pump

Abstract

The utility model relates to the technical field of oil pumps, in particular to an oil pump pressure-limiting valve installation structure which comprises a shell, an installation hole is formed in the shell, a pressure-limiting valve assembly is installed in the installation hole, the pressure-limiting valve assembly is formed by combining a positioning seat, a pressure relief spring and a sealing ball, a first circular plate is fixedly installed at one end of the positioning seat, and a second circular plate is fixedly installed at the other end of the positioning seat. A spring rod is fixedly mounted on the first circular plate, a second circular plate is fixedly mounted at one end of the spring rod, a sealing air bag is fixedly mounted between the first circular plate and the second circular plate, a sealing bolt is inserted into one end of the mounting hole in a threaded mode, and an ejector rod is fixedly mounted on the sealing bolt. The sealing bolt, the ejector rod, the first circular plate, the spring rod and the second circular plate are matched with one another to extrude the sealing air bag to deform the sealing air bag, so that a gap between the pressure limiting valve and the inner wall of the mounting hole is blocked, engine oil in the mounting hole is effectively prevented from overflowing, and the mounting sealing performance of the pressure limiting valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to an installation structure of a pressure limiting valve of an oil pump. Background Art

[0002] The oil pump is an important component in the lubrication system. Its function is to provide the lubrication system with oil of sufficient pressure and flow. The oil pump is provided with a high-pressure oil chamber and a low-pressure oil chamber. A pressure limiting valve is provided between the high-pressure oil chamber and the low-pressure oil chamber. The oil pump pressure limiting valve controls the oil flow and adjusts the oil pressure during the operation of the oil pump. When the oil pressure in the high-pressure oil chamber exceeds the set value, the pressure limiting valve opens, and the oil in the high-pressure oil chamber flows into the low-pressure oil chamber.

[0003] An installation hole connected to the internal oil channel is provided on the oil pump housing, and the pressure limiting valve is installed in the installation hole. When installing the pressure limiting valve, the pressure limiting valve is installed into the installation hole from the front end of the installation hole, and the front end of the installation hole of the pressure limiting valve is sealed, and the rear end is sealed by bolts. However, when installing the existing pressure limiting valve, there is a gap between the pressure limiting valve and the inner wall of the installation hole, and the sealing is poor, which may cause the oil in the installation hole to overflow. Utility Model Content

[0004] The purpose of the utility model is to solve the following shortcomings in the prior art: when the existing pressure limiting valve is installed, there is a gap between the pressure limiting valve and the inner wall of the mounting hole, the sealing is poor, and the oil in the mounting hole may overflow. A mounting structure for an oil pump pressure limiting valve is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An oil pump pressure limiting valve mounting structure comprises a housing, a mounting hole is formed on the housing, and a pressure limiting valve assembly is mounted in the mounting hole;

[0007] The pressure limiting valve assembly is composed of a positioning seat, a pressure relief spring and a sealing ball. The two ends of the pressure relief spring are fixedly connected to the positioning seat and the sealing ball respectively. A positioning assembly for limiting the positioning seat is provided in the mounting hole.

[0008] A first circular plate is fixedly mounted on one end of the positioning seat away from the pressure relief spring, a spring rod is fixedly mounted on the first circular plate, a second circular plate is fixedly mounted on one end of the spring rod away from the first circular plate, and an annular sealing airbag is fixedly mounted between the first circular plate and the second circular plate;

[0009] A sealing bolt is threadedly inserted at one end of the mounting hole, a push rod is fixedly mounted on the sealing bolt, and one end of the push rod is in contact with the second circular plate.

[0010] Preferably, the positioning assembly comprises a plurality of positioning blocks fixedly mounted on the inner wall of the mounting hole, and the plurality of positioning blocks are arranged in a circle in the mounting hole.

[0011] Preferably, a plurality of the positioning blocks are provided with mounting grooves on one side close to the positioning seat, and positioning pins are slidably installed in the mounting grooves via telescopic springs, and one ends of the plurality of positioning pins are in contact with the positioning seat.

[0012] Preferably, one end of the positioning pin is a pointed end, and a plurality of positioning grooves are formed at one end of the positioning seat close to the positioning block, and one ends of the plurality of positioning pins are respectively inserted into the plurality of positioning grooves.

[0013] Preferably, the second circular plate is provided with a plurality of through holes, the plurality of through holes are arranged in a circle on the second circular plate, baffle rods are slidably inserted into the plurality of through holes, and one end of the plurality of baffle rods is fixedly connected to the first circular plate.

[0014] Preferably, the sealing airbag is sleeved on a plurality of baffle rods, and the lengths of the plurality of baffle rods are all shorter than the length of the top rod.

[0015] In the utility model, the beneficial effects are:

[0016] When installing the pressure limiting valve, the sealing airbag is squeezed and deformed through the cooperation of the sealing bolt, the push rod, the first circular plate, the spring rod and the second circular plate, thereby blocking the gap between the pressure limiting valve and the inner wall of the mounting hole, effectively preventing the oil in the mounting hole from overflowing, and improving the sealing of the pressure limiting valve installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an oil pump pressure limiting valve installation structure proposed by the utility model;

[0018] Figure 2 It is a three-dimensional partial cross-sectional structural schematic diagram of an oil pump pressure limiting valve installation structure proposed by the utility model;

[0019] Figure 3 This is a three-dimensional exploded structural diagram of an oil pump pressure limiting valve installation structure proposed by the utility model;

[0020] Figure 4 It is a schematic diagram of a three-dimensional cross-sectional structure of a positioning block in an oil pump pressure limiting valve installation structure proposed by the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of a pressure limiting valve assembly in an oil pump pressure limiting valve installation structure proposed by the utility model;

[0022] Figure 6 for Figure 3 A magnified view of the structure in the middle.

[0023] In the figure: 1 housing, 2 positioning seat, 3 pressure relief spring, 4 sealing ball, 5 first circular plate, 6 spring rod, 7 second circular plate, 8 sealing airbag, 9 sealing bolt, 10 ejector rod, 11 positioning block, 12 telescopic spring, 13 positioning pin, 14 positioning groove, 15 stop rod. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-Figure 6 , an oil pump pressure limiting valve mounting structure, comprising a housing 1, a mounting hole is opened on the housing 1, and a pressure limiting valve assembly is mounted in the mounting hole;

[0026] The pressure-limiting valve assembly is composed of a positioning seat 2, a pressure relief spring 3 and a sealing ball 4. The two ends of the pressure relief spring 3 are fixedly connected to the positioning seat 2 and the sealing ball 4 respectively. A positioning assembly for limiting the positioning seat 2 is provided in the mounting hole. The positioning assembly includes a plurality of positioning blocks 11 fixedly mounted on the inner wall of the mounting hole. The plurality of positioning blocks 11 are arranged in a circle in the mounting hole.

[0027] When installing the pressure limiting valve, the positioning seat 2, the pressure relief spring 3 and the sealing ball 4 are inserted into the installation hole, the positioning seat 2 is in contact with the plurality of positioning blocks 11, and then the sealing ball 4 blocks the front end of the installation hole.

[0028] A first circular plate 5 is fixedly mounted on one end of the positioning seat 2 away from the pressure relief spring 3, a spring rod 6 is fixedly mounted on the first circular plate 5, a second circular plate 7 is fixedly mounted on one end of the spring rod 6 away from the first circular plate 5, and an annular sealing airbag 8 is fixedly mounted between the first circular plate 5 and the second circular plate 7;

[0029] A sealing bolt 9 is threadedly inserted into one end of the mounting hole, a push rod 10 is fixedly mounted on the sealing bolt 9, and one end of the push rod 10 is in contact with the second circular plate 7;

[0030] After the positioning seat 2 is installed in the mounting hole, the sealing bolt 9 is threadedly inserted into the rear end of the mounting hole. When the sealing bolt 9 is installed, it will drive the push rod 10 to contact the second circular plate 7, and drive the second circular plate 7 to move toward the first circular plate 5. The spring rod 6 is compressed, so that the distance between the first circular plate 5 and the second circular plate 7 becomes smaller, and the sealing airbag 8 is squeezed and deformed in all directions. Under the action of pressure, the surface of the sealing airbag 8 contacts the inner wall of the mounting hole, thereby blocking the gap between the positioning seat 2 and the inner wall of the mounting hole, effectively preventing the oil in the mounting hole from overflowing, and improving the sealing of the pressure limiting valve installation.

[0031] A plurality of positioning blocks 11 are provided with mounting grooves on one side close to the positioning seat 2, and positioning pins 13 are slidably installed in the mounting grooves through telescopic springs 12. One end of the plurality of positioning pins 13 is in contact with the positioning seat 2, and one end of the positioning pins 13 is a pointed end. A plurality of positioning grooves 14 are provided on one end of the positioning seat 2 close to the positioning block 11, and one end of the plurality of positioning pins 13 is respectively inserted into the plurality of positioning grooves 14;

[0032] When the positioning seat 2 is inserted into the mounting hole, the side of the positioning seat 2 close to the pressure relief spring 3 will contact one end of the plurality of positioning pins 13, and then the positioning seat 2 is rotated to align one end of the positioning pin 13 with the positioning groove 14, so that one end of the positioning pin 13 is inserted into the positioning groove 14, thereby preventing the positioning seat 2 from rotating during use. At the same time, when the sealing bolt 9 is installed, the positioning seat 2 will be driven to move toward the positioning block 11, so that the positioning pin 13 moves into the mounting groove, and the telescopic spring 12 is compressed. Under the action of the elastic force of the telescopic spring 12, the positioning seat 2 is prevented from shaking back and forth in the mounting hole.

[0033] A plurality of through holes are provided on the second circular plate 7 and are arranged in a circle. Baffle rods 15 are slidably inserted into the plurality of through holes. One ends of the plurality of baffle rods 15 are fixedly connected to the first circular plate 5. The sealing airbag 8 is sleeved on the plurality of baffle rods 15. The lengths of the plurality of baffle rods 15 are all smaller than the length of the top rod 10 to prevent one end of the baffle rod 15 from hitting the sealing plug 9.

[0034] When the second circular plate 7 moves, the plurality of blocking rods 15 slide relatively in the through hole. Under the action of the plurality of blocking rods 15, the deformation of the sealing airbag 8 toward the inner circle is reduced, and the deformation of the sealing airbag 8 toward the outer circle is ensured as much as possible.

[0035] In the utility model, after the positioning seat 2 is installed in the mounting hole, the sealing bolt 9 is threadedly inserted into the rear end of the mounting hole, the push rod 10 contacts the second circular plate 7, and drives the second circular plate 7 to move toward the first circular plate 5, so that the spacing between the first circular plate 5 and the second circular plate 7 becomes smaller, the sealing airbag 8 is squeezed and deformed in all directions, and the surface of the sealing airbag 8 contacts the inner wall of the mounting hole, thereby blocking the gap between the positioning seat 2 and the inner wall of the mounting hole, effectively preventing the oil in the mounting hole from overflowing, and improving the sealing of the pressure limiting valve installation.

[0036] In general, with respect to the technical problem: when the existing pressure limiting valve is installed, there is a gap between the pressure limiting valve and the inner wall of the mounting hole, and the sealing is poor, which may cause the oil in the mounting hole to overflow; a technical solution is adopted: the gap between the pressure limiting valve and the inner wall of the mounting hole is blocked by the mutual cooperation of the sealing bolt 9, the push rod 10, the first circular plate 5, the spring rod 6 and the second circular plate 7; because the implementation process of the technical solution is: after the positioning seat 2 is installed in the mounting hole, the sealing bolt 9 is threadedly inserted into the rear end of the mounting hole, the push rod 10 contacts the second circular plate 7, and drives the second circular plate 7 to move toward the first circular plate 5, so that the distance between the first circular plate 5 and the second circular plate 7 becomes smaller, the sealing airbag 8 is squeezed and deformed in all directions, and the surface of the sealing airbag 8 contacts the inner wall of the mounting hole, thereby blocking the gap between the positioning seat 2 and the inner wall of the mounting hole; so the technical problem can definitely be solved, and the technical effect achieved is: effectively preventing the oil in the mounting hole from overflowing and improving the sealing of the pressure limiting valve installation.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil pump pressure limiting valve installation structure, comprising a housing (1), characterized in that: The housing (1) is provided with a mounting hole, in which a pressure limiting valve assembly is mounted; The pressure limiting valve assembly is composed of a positioning seat (2), a pressure relief spring (3) and a sealing ball (4); the two ends of the pressure relief spring (3) are respectively fixedly connected to the positioning seat (2) and the sealing ball (4); and a positioning assembly for limiting the positioning seat (2) is provided in the mounting hole; A first circular plate (5) is fixedly mounted on one end of the positioning seat (2) away from the pressure relief spring (3); a spring rod (6) is fixedly mounted on the first circular plate (5); a second circular plate (7) is fixedly mounted on one end of the spring rod (6) away from the first circular plate (5); and an annular sealing airbag (8) is fixedly mounted between the first circular plate (5) and the second circular plate (7); A sealing bolt (9) is threadedly inserted at one end of the mounting hole, a push rod (10) is fixedly mounted on the sealing bolt (9), and one end of the push rod (10) is in contact with the second circular plate (7).

2. The oil pump pressure limiting valve installation structure according to claim 1, characterized in that: The positioning assembly comprises a plurality of positioning blocks (11) fixedly mounted on the inner wall of the mounting hole, and the plurality of positioning blocks (11) are arranged in a circumference in the mounting hole.

3. The oil pump pressure limiting valve installation structure according to claim 2, characterized in that: A plurality of the positioning blocks (11) are provided with mounting grooves on one side close to the positioning seat (2), and a positioning pin (13) is slidably mounted in the mounting groove via a telescopic spring (12), and one end of the plurality of the positioning pins (13) is in contact with the positioning seat (2).

4. The oil pump pressure limiting valve installation structure according to claim 3, characterized in that: One end of the positioning pin (13) is a pointed tip, and one end of the positioning seat (2) close to the positioning block (11) is provided with a plurality of positioning grooves (14), and one end of the plurality of positioning pins (13) is respectively inserted into the plurality of positioning grooves (14).

5. The oil pump pressure limiting valve installation structure according to claim 1, characterized in that: The second circular plate (7) is provided with a plurality of through holes, the plurality of through holes being arranged in a circumferential pattern on the second circular plate (7), a blocking rod (15) being slidably inserted into each of the plurality of through holes, and one end of each of the plurality of blocking rods (15) being fixedly connected to the first circular plate (5).

6. The oil pump pressure limiting valve installation structure according to claim 5, characterized in that: The sealing airbag (8) is sleeved on a plurality of baffle rods (15), and the lengths of the plurality of baffle rods (15) are all shorter than the length of the top rod (10).

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