CN109000140B

CN109000140B - Oil pump of automobile engine

Info

Publication number: CN109000140B
Application number: CN201810983906.8A
Authority: CN
Inventors: 周丰
Original assignee: Chongqing Yishente Auto Parts Co ltd
Current assignee: Chongqing Yishente Auto Parts Co ltd
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2020-12-01
Anticipated expiration: 2038-08-28
Also published as: CN109000140A

Abstract

The invention discloses an oil pump of an automobile engine, which comprises a pump body, a pump shaft, an outer rotor, an inner rotor and a pump cover, wherein an oil inlet cavity and an oil outlet cavity are respectively formed at two ends of the pump cover, the oil inlet cavity is communicated with the pump body, an arc-shaped third pipeline is communicated above the oil outlet cavity, one side of the third pipeline is fixedly connected with a second pipeline, the third pipeline is communicated with the second pipeline through a second through hole, the other side of the second pipeline is connected with a containing cylinder through a first pipeline, the containing cylinder is communicated with the first pipeline through the first through hole, a second piston is connected inside the containing cylinder, a third spring is connected below the second piston, a first inserting rod is fixedly connected inside the second pipeline through a first support, a first piston is movably sleeved on the first inserting rod, and a second spring is connected below the first piston and the first support, the defects of the prior art can be improved, the wear of engine parts is better prevented from increasing.

Description

Oil pump of automobile engine

Technical Field

The invention relates to an automobile part, in particular to an oil pump of an automobile engine.

Background

The automobile engine oil pump is a machine for conveying oil or pressurizing oil, is an important part in an engine lubricating system, mainly comprises a pump body, a gear set and a pump shaft, wherein the gear set is arranged on the pump shaft, and the pump shaft is arranged on the pump body in a penetrating way, and the Chinese utility model patent CN 204629055U discloses a wear-resistant automobile engine oil pump. When the engine oil pump machine with the structure is stopped, lubricating oil flows out of engine parts, if the engine oil pump machine is not used for a long time, the engine parts become dry, the friction coefficient is increased when the engine oil pump machine is restarted, mechanical abrasion is increased, the performance and the service life of the engine are influenced, and therefore the application range of the engine oil pump machine is limited.

Disclosure of Invention

The invention aims to provide an oil pump of an automobile engine, which can overcome the defects of the prior art and better prevent the increase of the abrasion of parts of the engine.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

An oil pump of an automobile engine comprises a pump body, a pump shaft, an outer rotor, an inner rotor and a pump cover, wherein an oil inlet cavity and an oil outlet cavity are respectively formed at two ends of the pump cover, the oil inlet cavity is communicated with the pump body, an arc-shaped third pipeline is connected above the oil outlet cavity in a through way, a second pipeline is fixedly connected to one side of the third pipeline, the third pipeline is communicated with the second pipeline through a second through hole, the upper part of the second pipeline is communicated with the pump body, the other side of the second pipeline is connected with a containing cylinder through a first pipeline, the containing cylinder is communicated with the first pipeline through the first through hole, a second piston is connected inside the containing cylinder, a third spring is connected to the lower part of the second piston, a first inserting rod is fixedly connected inside the second pipeline through a first support, a first piston is movably sleeved on the first inserting rod, and a second spring is connected to the lower part of the first piston and, the first pipeline, the second pipeline and the third pipeline are all located on the inner side of the pump cover.

Preferably, a second tapered portion is connected to an upper portion of the first piston.

Preferably, a first seal ring is connected to an outer side of the first piston.

Preferably, a limiting block is further connected above the first support.

Preferably, the third pipeline is fixed in the pump cover through the fixing seat, the third pipeline is connected with a second inserting rod in a circular arc shape, one end of the second inserting rod is fixedly connected with the fixing seat, the other end of the second inserting rod is fixedly connected with the outer wall of the third pipeline through a second support, a rubber ball is movably sleeved on the second inserting rod and is in contact with the inner wall of the third pipeline, a fourth spring is further connected between the rubber ball and the fixing seat, and an annular rubber pad in sealing contact with the inner wall of the third pipeline is fixed on the surface of the rubber ball.

Preferably, the rubber sleeve wraps the outer side of the second inserted bar, a plurality of annular spring bodies are connected between the rubber sleeve and the second inserted bar, and the elastic coefficient of each annular spring body is gradually reduced from one side close to the inlet of the third pipeline to one side far away from the inlet of the third pipeline.

Preferably, a third piston is slidably mounted at the bottom of the oil outlet cavity, and the third piston is fixed on the electromagnetic damper.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the action and working principle of the engine oil pump of the invention are completely consistent with the prior art, the outer rotor and the inner rotor in the pump body are driven to rotate by the rotation of the pump shaft, so as to drive the circulation and pressurization of lubricating oil, the oil inlet cavity on the pump cover is used for the suction of the lubricating oil, the first inserted link is used for movably connecting the first piston, when the engine oil pump is not started, the first piston is positioned above the first pipeline under the action of the second spring, the first piston can seal the second pipeline in the state, after the engine oil pump is started, the lubricating oil can enter the second pipeline from the pump body, under the pressure of the lubricating oil, the second spring is compressed to enable the first piston to move downwards and move to the connecting part of the first pipeline and the second pipeline, so that the sealing effect of the second pipeline is lost, and a stress balance is achieved in the state, at the moment, lubricating oil can enter the second pipeline from the pump body and sequentially enters the lower ends of the first pipeline and the second pipeline, at the moment, part of the lubricating oil can enter the third pipeline through a second through hole between the second pipeline and the third pipeline and further downwards enter the oil outlet cavity to discharge the lubricating oil, the other part of the lubricating oil enters the accommodating cylinder through the first through hole and downwards compresses the second piston and the third spring under the pressure action of the lubricating oil to enable part of the lubricating oil to be stored in the accommodating cylinder and gradually reach pressure balance, after the automobile stopping oil pump stops again, the first piston closes the second pipeline again under the action of the second spring, so that the lubricating oil is prevented from flowing back into the pump body, and due to the pressure reduction of the lubricating oil in the system, the second piston moves upwards under the action of the third spring and gradually pumps the lubricating oil in the accommodating cylinder into the first pipeline, The second pipeline and the like are further conveyed to the outside of the oil outlet cavity, so that all parts of the engine can be in a lubricating oil infiltration state in a stop state, the engine parts are prevented from becoming dry, the friction coefficient is increased when the engine is restarted, the mechanical abrasion is increased, the arc-shaped third pipeline above the oil outlet cavity is positioned right above the oil outlet cavity, the pressure of a system can be relieved, the water hammer effect when the oil pump is suddenly started is prevented, and the lubricating oil backflow abnormality under the abnormal condition can also be prevented. The second conical part above the first piston can ensure that the first piston can smoothly enter the second pipeline when the oil pump stops. The outside of first piston is connected with first sealing washer, can guarantee the sealed effect of first piston. The limiting block above the first support can further ensure that the position of the first piston can be fixed at the connecting part of the first pipeline and the second pipeline under the action of the pressure of the lubricating oil, so that the pressure fluctuation is prevented from causing the unfixed position of the first piston. The inside second inserted bar of third pipeline for the rubber ball is established to the cover, the rubber ball can carry out certain sealing and block to the third pipeline, and limit the position through the fourth spring, under this structure, the at the oil pump starting condition that enables, under the lubricating oil pressure effect, can drive the rubber ball and remove to the fixing base direction, make the third pipeline also can store certain lubricating oil, and the messenger when the oil pump stops, under the impetus of fourth spring and rubber ball, lubricating oil can flow to play oil chamber the very first time, guarantee that the lubricating oil in the system can not run out. The annular rubber pad and the rubber sleeve form internal and external bidirectional sealing, so that the sealing performance of the rubber ball and the third pipeline can be ensured. The annular spring body in the rubber sleeve can apply extrusion force to the rubber ball, so that the purpose that the moving speed of the rubber ball is gradually reduced along with the outward movement of the rubber ball according to different elastic coefficients is achieved, and the smoothness of lubricating oil supply is improved. In addition, through controlling the electromagnetic damper, can carry out the accuracy regulation and control to the oil pressure that produces oil intracavity to realize the multistage regulation of fuel feeding.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

Fig. 2 is an enlarged structural view of a portion a of the drawing in accordance with an embodiment of the present invention.

Fig. 3 is a block diagram of a third pipe and a second pipe in an embodiment of the present invention.

Fig. 4 is a block diagram of a bushing in accordance with an embodiment of the present invention.

FIG. 5 is an enlarged partial view of a second plunger structure according to an embodiment of the present invention.

Fig. 6 is a structural view of a ball mounting position in an embodiment of the present invention.

FIG. 7 is an enlarged view of a portion of the surface of a ball in accordance with one embodiment of the present invention.

In the figure: 1. a pump body; 2. an outer rotor; 3. a pump shaft; 4. an inner rotor; 5. an oil inlet cavity; 6. a sleeve; 7. a first tapered portion; 8. a first spring; 9. a positioning column; 10. a tapered cavity; 11. a ball bearing; 12. a hemispherical cavity; 13. a first bracket; 14. a second spring; 15. a first piston; 16. a first seal ring; 17. a second tapered portion; 18. a limiting block; 19. a pump cover; 20. an oil outlet cavity; 21. a receiving cylinder; 22. a second piston; 23. a third spring; 24. a first through hole; 25. a first conduit; 26. a second conduit; 27. a first plunger; 28. a third pipeline; 29. a second plunger; 30. a fourth spring; 31. a rubber ball; 32. a fixed seat; 33. a second bracket; 34. a second via.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1 to 7, an embodiment of the present invention includes a pump body 1, a pump shaft 3, an outer rotor 2, an inner rotor 4, and a pump cover 19, where two ends of the pump cover 19 are respectively provided with an oil inlet cavity 5 and an oil outlet cavity 20, the oil inlet cavity 5 is communicated with the pump body 1, an arc-shaped third pipe 28 is connected above the oil outlet cavity 20, one side of the third pipe 28 is fixedly connected with a second pipe 26, the third pipe 28 and the second pipe 26 are communicated with each other through a second through hole 34, an upper side of the second pipe 26 is communicated with the pump body 1, the other side of the second pipe 26 is connected with an accommodating cylinder 21 through a first pipe 25, the accommodating cylinder 21 is communicated with the first pipe 25 through a first through hole 24, the inside of the accommodating cylinder 21 is connected with a second piston 22, a third spring 23 is connected below the second piston 22, a first plunger 27 is fixedly connected inside the second pipe 26 through a first bracket 13, the first plunger 27 is movably sleeved with a first piston 15, a second spring 14 is connected below the first piston 15 and the first support 13, and the first pipeline 25, the second pipeline 26 and the third pipeline 28 are all located on the inner side of the pump cover 19.

A second tapered portion 17 is connected to an upper portion of the first piston 15. The action and the working principle of the engine oil pump of the invention are completely consistent with the prior art, the outer rotor 2 and the inner rotor 4 in the pump body 1 are driven to rotate by the rotation of the pump shaft 3, so as to drive the circulation and pressurization of lubricating oil, the oil inlet cavity 5 on the pump cover 19 is used for the suction of the lubricating oil, the first inserted link 27 is used for movably connecting the first piston 15, when the engine oil pump of the invention is not started, the first piston 15 is positioned above the first pipeline 25 under the action of the second spring 14, in the state, the first piston 15 can seal the second pipeline 26, after the engine oil pump is started, the lubricating oil can enter the second pipeline 26 from the pump body 1, under the pressure of the lubricating oil, the second spring 14 is compressed to make the first piston 15 move downwards and move to the connecting part of the first pipeline 25 and the second pipeline 26, so as to lose the sealing effect on the second pipeline 26, and reach a stress balance in this state, at this time, the lubricating oil can enter the second pipeline 26 from the pump body 1, and enter the lower ends of the first pipeline 25 and the second pipeline 26 in sequence, at this time, a part of the lubricating oil can enter the third pipeline 28 through the second through hole 34 between the second pipeline 26 and the third pipeline 28, and further enter the oil outlet chamber 20 downwards, the discharge of the lubricating oil is completed, another part of the lubricating oil enters the accommodating cylinder 21 through the first through hole 24, and under the action of the lubricating oil pressure, the second piston 22 and the third spring 23 are compressed downwards, so that a part of the lubricating oil is stored in the accommodating cylinder 21, and the pressure balance is gradually reached, when the vehicle stops again, at this time, under the action of the second spring 14, the first piston 15 seals the second pipeline 26 again, therefore, the lubricating oil is prevented from flowing back into the pump body 1, under the action of the third spring 23, the second piston 22 moves upwards and pumps the lubricating oil in the accommodating cylinder 21 into the first pipeline 25, the second pipeline 26 and the like gradually and further conveys the lubricating oil to the outside of the oil outlet cavity 20 under the action of the pressure of the lubricating oil in the system, so that all parts of the engine can be in a lubricating oil infiltration state under the stop state, the parts of the engine are prevented from becoming dry, the friction coefficient is increased when the engine is restarted, the mechanical wear is increased, the arc-shaped third pipeline 28 above the oil outlet cavity 20 is positioned right above the oil outlet cavity 20, the system pressure can be relieved, the water hammer effect when the oil pump is suddenly started is prevented, and the abnormal condition that the lubricating oil flows back under the abnormal condition can also be prevented. A second tapered portion 17 is connected to an upper portion of the first piston 15. The second tapered portion 17 above the first piston 15 ensures that the first piston 15 can smoothly enter the second conduit 26 when the oil pump is stopped. A first sealing ring 16 is connected to the outer side of the first piston 15. The outer side of the first piston 15 is connected with a first sealing ring 16, which can ensure the sealing effect of the first piston 15. A limiting block 18 is further connected above the first support 13. The limiting block 18 above the first bracket 13 can further ensure that the position of the first piston 15 can be fixed at the connecting part of the first pipeline 25 and the second pipeline 26 under the action of the pressure of the lubricating oil, so that the position of the first piston 15 is prevented from being unfixed due to pressure fluctuation. Third pipeline 28 passes through fixing base 32 to be fixed in pump cover 19's inside, the internal connection of third pipeline 28 has convex second inserted bar 29, the one end and the fixing base 32 fixed connection of second inserted bar 29, the other end of second inserted bar 29 passes through the outer wall fixed connection of second support 33 and third pipeline 28, the movable sleeve is equipped with rubber ball 31 on the second inserted bar 29, rubber ball 31 and third pipeline 28's inner wall contacts each other, still be connected with fourth spring 30 between rubber ball 31 and the fixing base 32, rubber ball 31's fixed surface has the annular rubber pad 35 with third pipeline 28 inner wall sealing contact. The inside second inserted bar 29 of third pipeline 28 for the rubber ball 31 is established to the cover, rubber ball 31 can carry out certain sealing and block to third pipeline 28, and limit the position through fourth spring 30, under this structure, the at oil pump starting condition that enables, under the lubricating oil pressure effect, can drive rubber ball 31 and remove to fixing base 32 direction, make third pipeline 28 also can store certain lubricating oil, and the at oil pump that makes stops, under the impetus of fourth spring 30 and rubber ball 31, lubricating oil can flow to play oil chamber 20 very first time, guarantee that the lubricating oil in the system can not exhaust.

The rubber sleeve 36 wraps the outer side of the second insertion rod 29, a plurality of annular spring bodies 37 are connected between the rubber sleeve 36 and the second insertion rod 29, and the elastic coefficient of the annular spring bodies 37 is gradually reduced from one side close to the inlet of the third pipeline 28 to one side far away from the inlet of the third pipeline 28. A third piston 38 is slidably mounted at the bottom of the oil outlet chamber 20, and the third piston 38 is fixed on an electromagnetic damper 39. The annular rubber pad 35 and the rubber sleeve 36 form an inner-outer bidirectional seal, so that the sealing performance of the rubber ball 31 and the third pipeline 28 can be ensured. The annular spring body 37 in the rubber sleeve 36 can apply a pressing force to the rubber ball 31, so that the purpose of gradually reducing the moving speed of the rubber ball 31 as the rubber ball 31 moves outwards according to different elastic coefficients is achieved, and the smoothness of lubricating oil supply is improved. In addition, through controlling electromagnetic damper 39, can carry out accurate regulation and control to the oil pressure in the oil outlet cavity to realize the multistage regulation of fuel feeding.

In addition, in order to further improve the working effect of the present invention, a sleeve 6 is further connected inside the pump body 1, a positioning column 9 is movably inserted inside the sleeve 6 through a first spring 8, a tapered cavity 10 is formed outside the positioning column 9, a hemispherical cavity 12 is formed in the center of the tapered cavity 10, the pump shaft is located at one end inside the pump body 1, the pump shaft is further connected with a first tapered portion 7, a ball 11 is connected to the top end of the first tapered portion 7, the ball 11 is located inside the hemispherical cavity 12, the first tapered portion 7 is located inside the tapered cavity 10, by the above structure, the tapered cavity 10 can play a role in limiting the first tapered portion 7, the position change of the pump shaft 3 is prevented, the ball 11 and the hemispherical cavity 12 can reduce the friction force therebetween, the spring telescopic structure of the positioning column 9 can ensure that the first tapered portion 7 is located inside the tapered cavity 10 on one hand, and the ball 11 and the hemispherical cavity 12 are in contact, the oil pump has the advantages that dislocation is prevented, and on the other hand, a certain damping effect can be achieved, so that abrasion is further reduced, oil leakage is prevented, and the service life of the oil pump is prolonged.

And a second sealing ring 40 is fixed at the top end of the first conical part 7, the second sealing ring 40 is in interference fit with the ball 11, and filter cotton 41 is fixed at the bottom of the second sealing ring 40. Along with the rotation of the balls 11, the debris generated in the mutual friction process is gradually collected to the filter cotton 41, so that the abrasion of the balls 11 is effectively reduced, and the service life of the balls 11 is prolonged. The surface of the ball 11 is uniformly provided with a plurality of grooves 42, the width of the top of each groove 42 is smaller than that of the bottom of each groove, and adjacent grooves 42 are communicated through third through holes 43. The grooves 42 communicating with each other can improve the flow uniformity of the lubricant on the surface of the balls 11, and improve the conduction of frictional heat to the surface of the balls 11 and the efficiency of discharging foreign substances.

The pump body, the pump shaft, the outer rotor, the inner rotor, the pump cover and other devices used in the invention are fully disclosed in the patent documents cited in the background art, belong to the mature prior art, and the specific structures are not detailed herein.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an automobile engine oil pump, includes pump body (1), pump shaft (3), outer rotor (2), inner rotor (4) and pump cover (19), its characterized in that: an oil inlet cavity (5) and an oil outlet cavity (20) are respectively formed in two ends of the pump cover (19), the oil inlet cavity (5) is communicated with the pump body (1), a circular arc-shaped third pipeline (28) is connected above the oil outlet cavity (20) in a penetrating manner, a second pipeline (26) is fixedly connected to one side of the third pipeline (28), the third pipeline (28) is communicated with the second pipeline (26) through a second through hole (34), the upper portion of the second pipeline (26) is communicated with the pump body (1), the other side of the second pipeline (26) is connected with a containing cylinder (21) through a first pipeline (25), the containing cylinder (21) is communicated with the first pipeline (25) through a first through hole (24), a second piston (22) is connected inside the containing cylinder (21), a third spring (23) is connected below the second piston (22), and a first inserting rod (27) is fixedly connected inside the second pipeline (26) through a first support (13), a first piston (15) is movably sleeved on the first inserted rod (27), a second spring (14) is connected with the first support (13) below the first piston (15), and the first pipeline (25), the second pipeline (26) and the third pipeline (28) are all positioned on the inner side of the pump cover (19);

the third pipeline (28) is fixed inside the pump cover (19) through a fixing seat (32), the third pipeline (28) is connected with a circular arc-shaped second insertion rod (29) inside, one end of the second insertion rod (29) is fixedly connected with the fixing seat (32), the other end of the second insertion rod (29) is fixedly connected with the outer wall of the third pipeline (28) through a second support (33), a rubber ball (31) is movably sleeved on the second insertion rod (29), the rubber ball (31) is in contact with the inner wall of the third pipeline (28), a fourth spring (30) is further connected between the rubber ball (31) and the fixing seat (32), and an annular rubber pad (35) in sealing contact with the inner wall of the third pipeline (28) is fixed on the surface of the rubber ball (31); the rubber sleeve (36) wraps the outer side of the second inserted rod (29), a plurality of annular spring bodies (37) are connected between the rubber sleeve (36) and the second inserted rod (29), and the elastic coefficient of each annular spring body (37) is gradually reduced from one side close to the inlet of the third pipeline (28) to one side far away from the inlet of the third pipeline (28); a third piston (38) is slidably mounted at the bottom of the oil outlet cavity (20), and the third piston (38) is fixed on an electromagnetic damper (39).

2. The automotive engine oil pump of claim 1, characterized in that: a second tapered portion (17) is connected to the upper side of the first piston (15).

3. The automotive engine oil pump of claim 1, characterized in that: the outer side of the first piston (15) is connected with a first sealing ring (16).

4. The automotive engine oil pump of claim 1, characterized in that: a limiting block (18) is further connected above the first support (13).