CN216010373U

CN216010373U - Oil pump with independent overflow valve

Info

Publication number: CN216010373U
Application number: CN202121777202.9U
Authority: CN
Inventors: 史祥龙
Original assignee: Nanjing Chuangxin Oil Pump Manufacturing Co ltd
Current assignee: Nanjing Chuangxin Oil Pump Manufacturing Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-11
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses an oil pump with an independent overflow valve, which comprises a pump body and a pump cover matched with the pump body, wherein an oil inlet and an oil outlet are arranged on the pump cover, an overflow hole communicated with the oil outlet is arranged on the pump body, the overflow valve is arranged in the overflow hole, a check ring for compressing the overflow valve is connected in the overflow hole in a threaded manner, the overflow valve comprises an outer sleeve, a steel ball, a spring and a lock ring, the steel ball and the spring are arranged in the outer sleeve, the spring supports the steel ball at one end with a smaller opening diameter of the outer sleeve, and the lock ring is connected at one end with a larger opening diameter of the outer sleeve in a threaded manner and compresses the spring. When the oil pump is used, the spring pressure in the overflow valve is born by the overflow valve, and the check ring on the overflow hole only bears the oil pressure at the oil outlet end of the oil pump, so that the bearing pressure of the check ring is greatly reduced, the check ring is not easy to loosen, and the reliability of the oil pump is improved.

Description

Oil pump with independent overflow valve

Technical Field

The utility model relates to the technical field of oil pumps, in particular to an overflow valve and an oil pump.

Background

The oil pump is a device for supplying high-pressure oil, is used for supplying oil to the device, and is widely applied to engines. At present, in order to improve the safety of the oil pump, a built-in overflow valve is usually arranged at the high-pressure end of the oil pump and used for overflowing when the oil pressure is too high, so as to control the oil pressure at the high-pressure end of the oil pump and avoid the damage of the oil pump caused by the too high oil pressure.

At present, an overflow valve in an existing oil pump is usually realized through a steel ball and a spring which are arranged in an overflow hole, as shown in fig. 1, the spring has a certain initial pressure, when the pressure at an oil outlet end of the oil pump has a certain value, the steel ball is pressed to move, the overflow hole is conducted to release pressure, the spring is fixed in the overflow hole through a nut or a retainer ring, when the oil pump is assembled, the steel ball and the spring need to be sequentially placed into the overflow hole and pressed by the retainer ring, the pressing degree of the retainer ring needs to be strictly controlled, so that the overflow pressure of the oil pump meets requirements, and the assembling process requirement is high. Secondly, a check ring of the compression spring bears the pressure of the spring on one hand and also needs to bear the oil pressure at the oil outlet end of the oil pump on the other hand, and when the working environment of the oil pump is poor (frequent vibration and the like), threads of the check ring are easy to loosen, so that the overflow pressure of the oil pump is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil pump with an independent overflow valve, which has the advantages that the overflow valve is independently arranged, and the pressure borne by a retainer ring is reduced, so that the retainer ring is not easy to loosen.

The utility model aims to realize the purpose through the following technical scheme that the oil pump with the independent overflow valve comprises a pump body and a pump cover matched with the pump body, wherein the pump cover is provided with an oil inlet and an oil outlet, the pump body is provided with an overflow hole communicated with the oil outlet, the overflow hole is internally provided with the overflow valve, the overflow hole is internally connected with a check ring for pressing the overflow valve, the overflow valve comprises a jacket, a steel ball, a spring and a lock ring, two ends of the jacket are communicated, the opening diameter of one end of the jacket is larger than that of the steel ball, the opening diameter of the other end of the jacket is smaller than that of the steel ball, the steel ball and the spring are arranged in the jacket, the spring supports the steel ball at the end with the smaller opening diameter of the jacket, and the lock ring is in threaded connection with the end with the larger opening diameter of the jacket and presses the spring.

Through the technical scheme, the independent overflow valve is arranged in the overflow hole, the overflow valve can be independently processed, manufactured and assembled on the oil pump, the overflow pressure of the overflow valve can be accurately controlled, and when the overflow valve is assembled with the oil pump, the overflow valve only needs to be placed into the overflow hole. When the oil pump is used, the spring pressure in the overflow valve is born by the overflow valve, and the check ring on the overflow hole only bears the oil pressure at the oil outlet end of the oil pump, so that the bearing pressure of the check ring is greatly reduced, the check ring is not easy to loosen, and the reliability of the oil pump is improved.

The utility model is further arranged such that the outer diameter of the outer sleeve is equal to the inner diameter of the overflow aperture.

Through the technical scheme, after the overflow valve is arranged in the overflow hole, the outer sleeve can be in good contact with the overflow hole, when the overflow valve is not conducted, oil leakage in the overflow hole is not easy, and the reliability of the oil pump is improved.

The utility model is further arranged that the end with smaller diameter of the outer sleeve opening is in a cone-shaped transition.

Through above-mentioned technical scheme, on the one hand, the overcoat can be with the downthehole conical surface of overflow good contact, and on the other hand, the conical surface can make the steel ball be in the center line position of overcoat all the time, is favorable to the steel ball to plug up the one end of urceolus.

The utility model is further arranged in that the outer sleeve is in threaded connection with the locking ring, the end part of the outer sleeve is provided with internal threads, and the outer side of the locking ring is provided with internal threads.

Through above-mentioned technical scheme, the surface of overcoat can be with the inside good contact of overflow hole.

The utility model is further arranged that the end of the locking ring is provided with a baffle plate which is in contact with the end of the outer sleeve.

Through the technical scheme, the baffle is arranged to be used for accurately controlling the connection between the outer sleeve and the locking ring, so that the compression amount of the spring is fixed, and the overflow pressure of each overflow valve can be guaranteed within a fixed range.

The utility model is further arranged such that the inner ring of the locking ring is arranged as an internal hexagon.

Through the technical scheme, the lock ring can be rotated by using a tool, and the assembly of the lock ring is facilitated.

In conclusion, the beneficial effects of the utility model are as follows:

1. an independent overflow valve is arranged in the overflow hole, and the overflow valve can be processed, manufactured and assembled independently of the oil pump, so that the overflow pressure of the overflow valve can be accurately controlled;

2. when the oil pump is used, the spring pressure in the overflow valve is born by the overflow valve, and the check ring on the overflow hole only bears the oil pressure at the oil outlet end of the oil pump, so that the bearing pressure of the check ring is greatly reduced, the check ring is not easy to loosen, and the reliability of the oil pump is improved.

Drawings

FIG. 1 is a schematic diagram of a prior art oil pump;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an overflow valve in the embodiment of the utility model.

In the figure, 1, a pump body; 2. a pump cover; 3. an oil inlet; 4. an oil outlet; 5. an overflow aperture; 6. a retainer ring; 7. a jacket; 8. a steel ball; 9. a spring; 10. a locking ring; 11. and a baffle plate.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

Example (b): referring to fig. 2-3, an oil pump with an independent overflow valve comprises a pump body 1 and a pump cover 2 matched with the pump body 1, wherein an oil inlet 3 and an oil outlet 4 are arranged on the pump cover 2, an overflow hole 5 communicated with the oil outlet 4 is arranged on the pump body 1, the overflow hole 5 is internally provided with the overflow valve, the overflow hole 5 is internally threaded with a retainer ring 6 for compressing the overflow valve, the overflow valve comprises a jacket 7, a steel ball 8, a spring 9 and a lock ring 10, two ends of the jacket 7 are communicated, the opening diameter of one end of the jacket 7 is larger than that of the steel ball 8, the opening diameter of the other end of the jacket 7 is smaller than that of the steel ball 8, the steel ball 8 and the spring 9 are arranged in the jacket 7, the steel ball 8 is abutted against the end of the jacket 7 with the smaller opening diameter, and the lock ring 10 is threaded with the end of the jacket 7 with the larger opening diameter and compresses the spring 9. An independent overflow valve is arranged in the overflow hole 5, the overflow valve can be independently processed, manufactured and assembled on the oil pump, the overflow pressure of the overflow valve can be accurately controlled, and when the overflow valve is assembled with the oil pump, the overflow valve only needs to be placed into the overflow hole 5. When the oil pump is used, the pressure of a spring 9 in the overflow valve is born by the overflow valve, and the check ring 6 on the overflow hole 5 only bears the oil pressure at the oil outlet end of the oil pump, so that the bearing pressure of the check ring 6 is greatly reduced, the check ring 6 is not easy to loosen, and the reliability of the oil pump is improved.

The outer diameter of the outer sleeve 7 is equal to the inner diameter of the overflow hole 5, after the overflow valve is installed in the overflow hole 5, the outer sleeve 7 can be in good contact with the overflow hole 5, when the overflow valve is not conducted, oil leakage in the overflow hole 5 is not prone to occurring, and reliability of the oil pump is improved.

The less one end of 7 opening diameters of overcoat adopts the toper transition to be the round platform form, and on the one hand, overcoat 7 can be with the good contact of the conical surface in the overflow hole 5, and on the other hand, the conical surface can make steel ball 8 be in the center line position of overcoat 7 all the time, is favorable to steel ball 8 to plug up the one end of urceolus.

The threaded connection of the outer sleeve 7 and the lock ring 10 is characterized in that an internal thread is arranged at the end part of the outer sleeve 7, and an internal thread is arranged on the outer side of the lock ring 10. The outer surface of the jacket 7 can be in good contact with the interior of the overflow aperture 5. The end part of the locking ring 10 is provided with a baffle 11 which is contacted with the end part of the outer sleeve 7, and the baffle 11 is arranged for accurately controlling the connection between the outer sleeve 7 and the locking ring 10, so that the compression amount of the spring 9 is fixed, and the overflow pressure of each overflow valve can be ensured within a fixed range. The inner ring of the locking ring 10 is arranged to be hexagonal, and is used for rotating the locking ring 10 by using a tool, so that the assembly of the locking ring is convenient.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. An oil pump with an independent overflow valve comprises a pump body (1) and a pump cover (2) matched with the pump body (1), wherein an oil inlet (3) and an oil outlet (4) are formed in the pump cover (2), an overflow hole (5) communicated with the oil outlet (4) is formed in the pump body (1), the oil pump is characterized in that the overflow hole (5) is internally provided with the overflow valve, the overflow hole (5) is internally connected with a check ring (6) for pressing the overflow valve, the overflow valve comprises a jacket (7), a steel ball (8), a spring (9) and a lock ring (10), two ends of the jacket (7) are communicated, the opening diameter of one end of the jacket (7) is larger than that of the steel ball (8), the opening diameter of the other end of the jacket is smaller than that of the steel ball (8), the steel ball (8) and the spring (9) are arranged in the jacket (7), and the spring (9) enables the steel ball (8) to abut against the end of the jacket (7) with the smaller opening diameter, the locking ring (10) is in threaded connection with one end of the outer sleeve (7) with a larger opening diameter and compresses the spring (9).

2. The oil pump with an independent overflow valve according to claim 1, characterized in that the outer diameter of the outer sleeve (7) is equal to the inner diameter of the overflow hole (5).

3. The oil pump with the independent overflow valve according to claim 2, characterized in that the end of the outer sleeve (7) with the smaller opening diameter is in a truncated cone shape by adopting a conical transition.

4. The oil pump with the independent overflow valve according to claim 1, characterized in that the threaded connection between the outer sleeve (7) and the locking ring (10) is such that the end of the outer sleeve (7) is provided with internal threads and the outside of the locking ring (10) is provided with internal threads.

5. The oil pump with the independent overflow valve according to claim 1, characterized in that the end of the lock ring (10) is provided with a baffle (11) that contacts the end of the outer sleeve (7).

6. The oil pump with an independent overflow valve according to claim 5, characterized in that the inner ring of the lock ring (10) is configured as an internal hexagon.