Variable displacement engine oil pump and vehicle

Abstract

The utility model provides a variable displacement engine oil pump, which is characterized in that a structure with a shaft function and an eccentric ring are directly integrally formed, a rotating shaft boss is integrally formed on the outer peripheral wall of the eccentric ring structure, a rotating shaft groove matched with the rotating shaft boss in size is arranged at the corresponding position of the side wall of an inner cavity of a pump shell main body, and the groove bottom of the rotating shaft groove is in running fit with the rotating shaft boss. And a certain moving space is reserved between the opening side of the rotating shaft groove and the rotating shaft boss, so that the rotating shaft boss can swing in the rotating shaft groove within a certain range. By adopting the design, the rotating shaft and the eccentric ring are directly combined into an integral structure, so that tedious operation steps during mounting of the rotating shaft are avoided, the mounting position of the rotating shaft does not need to be manually debugged specially, the assembling procedures of the variable displacement engine oil pump are greatly reduced, and manual operation can be directly and automatically implemented in the assembling process to replace manual operation. The utility model further provides a vehicle comprising the variable displacement engine oil pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine equipment, specifically, a variable displacement engine oil pump and a vehicle. BACKGROUND

[0002] With the development of modern society, as an important means of transportation, cars have entered people's lives more and more. The performance and service life of the engine, as the core component of the car engine, are directly affected by the lubrication system. The lubrication system of the traditional car engine is simply driven by the rotating shaft of the engine to rotate the rotor of the oil pump, thereby driving a plurality of blades provided on the rotor to rotate. The eccentricity of the oil pump inner cavity and the rotating shaft causes the chambers surrounded by the plurality of blades during the rotation of the blades to be compressed and expanded, ultimately achieving negative pressure oil absorption and high pressure oil delivery.

[0003] Based on the upgrading of the traditional oil pump structure, the most widely used engine oil pump is a variable displacement oil pump. The design principle of the variable displacement oil pump is that a plurality of oil storage grooves extending along the axial direction and distributed along the circumferential direction are provided on the outer circumferential wall of the rotor. The two side walls of each oil storage groove and the outer circumferential wall of the rotor are continuously smooth arc transitions. The oil storage grooves are separated by the rotor and the blades. The pump cavity is provided with an eccentric ring structure for oil compression. The geometric center of the eccentric ring structure does not coincide with the axis of the rotor, so the blades arranged circumferentially around the rotor axis divide the inner cavity of the eccentric ring into a plurality of cavities of different volumes. Thus, when the rotor drives the blades to rotate, the different cavities are continuously compressed and expanded. The size of the eccentric distance determines the volume difference between the different cavities. Therefore, the larger the eccentric distance, the greater the compression and expansion. The rotation of the rotor drives the eccentric ring structure to make reciprocating swing motion around a certain rotation center located at the edge or outside of the main structure of the eccentric ring structure, completing the oil compression and output.

[0004] However, although this variable displacement oil pump design can achieve the variable displacement output function that traditional oil pumps do not have, it also has certain structural defects, specifically: the structure is complex, especially the movement matching structure of the eccentric ring such as the swing center structure around it, the assembly steps of the rotating shaft are more, and currently even cannot be automatically assembled, completely relying on manual assembly, which has a great adverse effect on the assembly efficiency of the oil pump, and there is a risk of misassembly and missed assembly of manual assembly.

[0005] In summary, the existing variable displacement engine oil pump has the technical problems of complex structure and difficulty in automatic assembly. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is the technical problem of the existing variable displacement engine oil pump, which has a complex structure and is difficult to be automatically assembled.

[0007] To solve the above problems, the utility model provides a kind of variable displacement engine oil pump, including pump shell main body and the eccentric ring structure being installed in the pump shell main body, the outer peripheral wall of the eccentric ring structure is integrally formed with the protruding shaft boss, the shaft boss includes integrally connected cylindrical shaft main body part and transition part, the central axis of the shaft main body part and the central axis of the eccentric ring structure are parallel to each other, the transition part is between the side surface of shaft main body part and the outer peripheral wall of eccentric ring structure, and it is recessed arc surface shape;The pump cavity side wall of the pump shell main body is provided with shaft slot at the position corresponding to the shaft boss, the shaft boss is contained in the shaft slot, the groove bottom side of the shaft slot is arc surface shape with the concave-convex cooperation of the shaft main body part, the side wall of the groove opening side of the shaft slot is protruding arc surface shape and there is preset spacing between the transition part of shaft boss, to reserve the space of the eccentric ring structure swinging around shaft boss.

[0008] The utility model provides a kind of variable displacement engine oil pump design of more simplified structure, with the design of the shaft cavity assembly shaft of one side of general same type oil pump eccentric ring being provided with shaft hinged mounting structure and cooperating pump shell cavity inner wall, the design provided by the present application is, directly integrally formed with the structure playing the function of shaft and eccentric ring, the position of the outer side wall of eccentric ring structure corresponding swing shaft is provided with integrally formed shaft boss, the size of the shaft slot corresponding to shaft boss is set in the corresponding position of pump shell main body inner cavity side wall, the groove bottom part of shaft slot and shaft boss are rotationally fitted, and a certain movement space is reserved between the opening side of shaft slot and shaft boss, so that shaft boss can swing within a certain range in shaft slot. Directly synthesize a whole structure with shaft and eccentric ring by using such design, and the cumbersome operation steps when installing shaft are avoided, without manually debugging the installation position of shaft, the assembly process of variable displacement engine oil pump is greatly reduced, and manual operation can be directly automated in assembly, effectively solve the technical problems that existing variable displacement engine oil pump has complex structure and is difficult to automate assembly.

[0009] As a preferred scheme, the outer peripheral wall of the eccentric ring structure is integrally formed with a protruding spring support structure on the other side opposite to the shaft boss, the pump cavity of the pump shell main body is provided with a communicating swing fitting cavity at the position corresponding to the spring support structure, and the outer side surface of the spring support structure can be slidably abutted with the side wall of the swing fitting cavity. The design optimizes the overall structure of the eccentric ring, and the spring support structure is integrally connected to the outer side wall of the ring. Through the cooperation between the spring support structure and the swing fitting cavity, the swing action of the eccentric ring can be periodically matched.

[0010] As a preferred scheme, the outer side of the spring support structure is provided with a mounting groove parallel to the shaft of the eccentric ring structure, and the mounting groove is filled with a sealing strip structure, which comprises an integral elastic part and a sealing part, the elastic part abuts against the groove bottom surface of the mounting groove, and the sealing part is in interference fit with the groove side surface of the mounting groove on both sides and protrudes from the mounting groove by a preset distance for sealing fit with the side wall of the swing matching cavity.

[0011] The design optimizes the sealing structure between the spring support structure and the inner side wall of the swing matching cavity in the inner cavity of the pump shell main body. In the existing design, the sealing structure is usually composed of two separate structures, including an approximately cylindrical elastic strip and an approximately cuboid sealing strip. The elastic strip provides pressure to ensure the sealing effect of the sealing strip. The present application directly combines the two separate structures into one integral part. The elastic part has a thickness suitable for the depth of the mounting groove, which can tightly abut the inner side wall of the swing matching cavity with the outer sealing part, so that the structure is effectively simplified, the number of required assembly parts is reduced, and the assembly steps are reduced.

[0012] As a preferred scheme, the elastic part and the sealing part are both strip-shaped with the length direction parallel to the shaft of the eccentric ring structure, and the thickness of the elastic part decreases from the opening side of the mounting groove to the groove bottom side. This design further optimizes the structure of the elastic part and the sealing part. The thickness of the elastic part on the side facing the inner bottom surface of the mounting groove is smaller, and the thickness of the side connected to the sealing part is larger, mainly to facilitate the insertion of the sealing structure.

[0013] As a preferred scheme, a reset compression spring is arranged in the swing matching cavity, and the two ends of the reset compression spring abut against the spring support structure and the swing matching cavity respectively to reset the position of the spring support structure. This design optimizes the functionality of the spring support structure. The reset compression spring can provide continuous elastic force to ensure the reciprocating swing of the eccentric ring under the drive of the rotor.

[0014] As a preferred scheme, the shaft boss is provided with an inwardly recessed shaft oil channel on the end face of its two sides, and the shaft oil channel is provided with a communication oil groove in communication with the position of the outer side wall of the shaft boss. This design provides a lubrication optimization for the integrated shaft. The shaft oil channel is arranged on the end face of the shaft boss, and the shaft oil channel is in communication with the outer side wall of the shaft boss, which facilitates the output of lubricating oil to the gap between the shaft boss and the shaft groove.

[0015] As a preferred scheme, the eccentric ring structure is provided with a first side oil channel recessed inward at the inner side edge of the eccentric ring structure adjacent to the shaft boss, and the first side oil channel is in communication with the shaft oil channel. The design is further optimized on the basis of the above-mentioned oil channel design, and the first side oil channel facilitates the communication of the lubricating oil path between the inside and outside of the eccentric ring.

[0016] As a preferred scheme, the eccentric ring structure is provided with a second side oil channel recessed inward at the inner side edge of the eccentric ring structure adjacent to the spring support structure, and the second side oil channel is provided with a slot in communication with the outer side wall position of the eccentric ring structure. The design is similar to the above-mentioned oil channel design principle, and the oil path design of the spring support structure side is optimized.

[0017] The utility model also provides a vehicle, including vehicle main body and power component, the power component includes the variable displacement engine oil pump as any one. Since the above-mentioned variable displacement engine oil pump has the beneficial effect as above, therefore the vehicle with the variable displacement engine oil pump should also have the corresponding beneficial effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an internal structure schematic diagram of the variable displacement engine oil pump provided by the utility model;

[0019] Figure 2 It is a partial enlarged structure schematic diagram of the variable displacement engine oil pump; Figure 1

[0020] Figure 3 It is a structure schematic diagram of the eccentric ring structure of the variable displacement engine oil pump; Figure 1

[0021] It is a partial enlarged structure schematic diagram of the spring support structure of the variable displacement engine oil pump; Figure 4 Figure 1 It is a structure schematic diagram of the sealing strip structure of the spring support structure of the variable displacement engine oil pump;

[0022] Figure 5 Figure 4

[0023] Among them, Figures 1-5 Among them:

[0024] 1, pump shell main body;2, eccentric ring structure;2-1, shaft oil channel;2-2, first side oil channel;2-3, second side oil channel;2-4, communication oil slot;3, shaft boss;3-1, main part;3-2, transition part;4, spring support structure;5, sealing strip structure;5-1, elastic part;5-2, sealing part;6, reset compression spring. DETAILED DESCRIPTION​​​​

[0025] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0026] Before the working principle of the utility model is described in detail, the description of the utility model needs to be further explained: in the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can be detachable connection, or integral connection; can be mechanical connection, can be direct connection, can be indirect connection through intermediate medium, or can be two element welding connection. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Reference Figures 1-5 The following examples are described as follows, Figure 1 An internal structure schematic diagram of a variable displacement engine oil pump is provided for the utility model; Figure 2 For Figure 1 A partial enlarged structure schematic diagram of the variable displacement engine oil pump; Figure 3 For Figure 1 A structure schematic diagram of the eccentric ring structure of the variable displacement engine oil pump; Figure 4 For Figure 1 A partial enlarged structure schematic diagram of the spring support structure of the variable displacement engine oil pump; Figure 5 For Figure 4 A structure schematic diagram of the sealing strip structure of the spring support structure of the variable displacement engine oil pump.

[0029] The variable displacement engine oil pump provided in the embodiment comprises a pump shell body 1 and an eccentric ring structure 2 installed in the pump shell body 1, the outer peripheral wall of the eccentric ring structure 2 is integrally connected with a protruding rotating shaft boss 3, the rotating shaft boss 3 comprises an integrally connected cylindrical rotating shaft body part 3-1 and a transition part 3-2, the central axis of the rotating shaft body part 3-1 is parallel to the central axis of the eccentric ring structure 2, the transition part 3-2 is located between the side surface of the rotating shaft body part 3-1 and the outer peripheral wall of the eccentric ring structure 2 and is in the form of a concave circular arc surface, the pump cavity side wall of the pump shell body 1 is provided with a rotating shaft groove at the position corresponding to the rotating shaft boss 3, the rotating shaft boss 3 is accommodated in the rotating shaft groove, the groove bottom side of the rotating shaft groove is in the form of a circular arc surface matched with the concave-convex of the rotating shaft body part 3-1, the side wall of the groove opening side of the rotating shaft groove is in the form of a convex circular arc surface and has a preset spacing with the transition part 3-2 of the rotating shaft boss 3 to reserve the space for the eccentric ring structure 2 to swing around the rotating shaft boss 3.

[0030] The utility model provides a variable displacement engine oil pump design of simpler structure, with the design that the shaft cavity assembly rotating shaft of one side of general same type oil pump eccentric ring is provided with shaft hinge installation structure and cooperates pump shell cavity inner wall, the design provided by the application is, directly integrally forming the structure playing the function of shaft and eccentric ring, the position of the outer side wall of eccentric ring structure 2 corresponding swing rotating shaft is provided with integrally formed rotating shaft boss 3, the position corresponding position of pump shell body 1 inner cavity side wall is provided with rotating shaft groove of size cooperation rotating shaft boss 3, the rotating shaft groove is matched with rotating shaft boss 3 between groove bottom part, and the rotating shaft groove opening side and rotating shaft boss 3 between reserved certain activity space, so that rotating shaft boss 3 can swing in certain range in rotating shaft groove. Adopt such design directly to synthesize rotating shaft and eccentric ring into one whole structure, avoid the cumbersome operation steps of rotating shaft installation, need not manually debug in the installation position of rotating shaft, greatly reduce the assembly process of variable displacement engine oil pump, can directly automatic implementation instead of manual operation in assembly, effectively solve the technical problem that the existing variable displacement engine oil pump has complex structure and is difficult to automatic assembly.

[0031] In the technical scheme provided by the embodiment, the outer peripheral wall of the eccentric ring structure 2 is integrally connected with a protruding spring support structure 4 on the other side opposite to the rotating shaft boss 3, the pump cavity of the pump shell body 1 is provided with a communicating swing matching cavity at the position corresponding to the spring support structure 4, and the outer side surface of the spring support structure 4 is slidably abutted with the side wall of the swing matching cavity. The design optimizes the overall structure of the eccentric ring, and the spring support structure is integrally connected with the outer side wall of the ring. Through the cooperation between the spring support structure and the swing matching cavity, the swing action of the eccentric ring can be periodically matched.

[0032] In the technical scheme provided by the embodiment, the outer side of the spring support structure 4 is provided with a mounting groove parallel to the shaft of the eccentric ring structure 2, the mounting groove is filled with a sealing strip structure 5, the sealing strip structure 5 includes an integrally formed elastic part 5-1 and a sealing part 5-2, the elastic part 5-1 abuts against the groove bottom surface of the mounting groove, and the sealing part 5-2 is in interference fit with the groove side surface of the mounting groove on both sides and protrudes from the mounting groove by a preset distance, and is used for abutting and sealing the side wall of the swing matching cavity.

[0033] The design optimizes the sealing structure between the spring support structure 4 and the inner side wall of the swing matching cavity in the inner cavity of the pump shell main body 1. In the existing design, the sealing structure is usually composed of two separate structures, including an approximately cylindrical elastic strip and an approximately cuboid strip. The elastic strip provides pressure to ensure the sealing effect of the sealing strip. The technical scheme directly combines the two separate structures into one integral part. The thickness of the elastic part 5-1 is suitable for the depth of the mounting groove, which can tightly abut the sealing part 5-2 on the outer side against the inner side wall of the swing matching cavity, so that the structure is effectively simplified, the number of required assembly parts is reduced, and the assembly steps are reduced.

[0034] In the technical scheme provided by the embodiment, the elastic part 5-1 and the sealing part 5-2 are both strip-shaped and parallel to the shaft of the eccentric ring structure 2 in the length direction. The thickness of the elastic part 5-1 decreases in the direction from the opening side of the mounting groove to the groove bottom side. The design further optimizes the structure of the elastic part 5-1 and the sealing part 5-2. The thickness of the elastic part 5-1 is smaller on the side facing the inner bottom surface of the mounting groove, and the thickness of the elastic part 5-1 is larger on the side connected to the sealing part 5-2. This is mainly to facilitate the insertion of the sealing structure.

[0035] In the technical scheme provided by the embodiment, a reset compression spring 6 is arranged in the swing matching cavity. The two ends of the reset compression spring 6 abut against the spring support structure 4 and the swing matching cavity, respectively, to reset the position of the spring support structure 4. The design optimizes the adaptability of the spring support structure 4. The reset compression spring 6 can provide continuous elastic force to ensure the reciprocating swing of the eccentric ring under the drive of the rotor.

[0036] In the technical scheme provided by the embodiment, the shaft boss 3 is provided with an inwardly recessed shaft oil channel 2-1 on the end surface of the two sides. The shaft oil channel 2-1 is provided with a communication oil groove 2-4 in communication with the position of the outer side wall of the shaft boss 3. The design provides a lubrication optimization for the integrated shaft. The shaft oil channel 2-1 is arranged on the end surface of the shaft boss 3 and is in communication with the outer side wall of the shaft boss 3, which facilitates the output of lubricating oil to the gap between the shaft boss 3 and the shaft groove.

[0037] In the technical scheme provided by the embodiment, the eccentric ring structure 2 is provided with a first side oil channel 2-2 recessed inward at the inner side edge of the position adjacent to the shaft boss 3, and the first side oil channel 2-2 is in communication with the shaft oil channel 2-1. The design is further optimized on the basis of the above oil channel design, and the structure of the first oil channel facilitates the communication of the lubricating oil path between the inside and outside of the eccentric ring.

[0038] In the technical scheme provided by the embodiment, the eccentric ring structure 2 is provided with a second side oil channel 2-3 recessed inward at the inner side edge of the position adjacent to the spring support structure 4, and the second side oil channel 2-3 is provided with a slot in communication with the position of the outer side wall of the eccentric ring structure 2. The design is similar to the above oil channel design principle, and the oil path design of one side of the spring support structure 4 is optimized.

[0039] The embodiment of the utility model further provides a vehicle, including vehicle main body and power component, the power component includes the variable displacement engine oil pump as any one embodiment. Since the above-mentioned variable displacement engine oil pump has the beneficial effect as above, therefore the vehicle with the variable displacement engine oil pump should also have the corresponding beneficial effect.

[0040] Although the utility model discloses the embodiment as above, the protection scope of the utility model disclosure is not limited to this. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall into the protection scope of the utility model.

Claims

1. A variable displacement engine oil pump comprising a pump housing body (1) and an eccentric ring structure (2) mounted within said pump housing body (1), characterized in that, The outer peripheral wall of the eccentric ring structure (2) is integrally connected with a protruding shaft boss (3), the shaft boss (3) includes an integrally connected cylindrical shaft body part (3-1) and a transition part (3-2), the central axis of the shaft body part (3-1) is parallel to the central axis of the eccentric ring structure (2), and the transition part (3-2) is located between the side surface of the shaft body part (3-1) and the outer peripheral wall of the eccentric ring structure (2) and is in the form of a concave circular arc surface; the pump cavity side wall of the pump shell main body (1) is provided with a shaft groove at a position corresponding to the shaft boss (3), the shaft boss (3) is accommodated in the shaft groove, the groove bottom side of the shaft groove is in the form of a circular arc surface matched with the convex and concave of the shaft body part (3-1), and the side wall of the groove opening side of the shaft groove is in the form of a convex circular arc surface and has a preset distance from the transition part (3-2) of the shaft boss (3) to reserve space for the eccentric ring structure (2) to swing around the shaft boss (3).

2. The variable-displacement engine oil pump of claim 1, wherein, The outer peripheral wall of the eccentric ring structure (2) is integrally connected with a protruding spring support structure (4) on the other side opposite to the shaft boss (3), and the pump cavity of the pump shell main body (1) is provided with a communicating swing matching cavity at a position corresponding to the spring support structure (4), and the outer side surface of the spring support structure (4) is slidably abutted with the swing matching cavity side wall.

3. The variable-dispersion engine oil pump of claim 2, wherein, The outer side of the spring support structure (4) is provided with a mounting groove parallel to the central axis of the eccentric ring structure (2), the mounting groove is filled with a sealing strip structure (5), the sealing strip structure (5) includes an integrally formed elastic part (5-1) and a sealing part (5-2), the elastic part (5-1) abuts with the groove bottom surface of the mounting groove, and the sealing part is in interference fit with the groove side surface of the mounting groove on both sides and protrudes from the mounting groove by a preset distance for sealing fit with the swing matching cavity side wall.

4. The variable-dispersion engine oil pump of claim 3, wherein, The elastic part (5-1) and the sealing part (5-2) are both in the form of a strip parallel to the central axis of the eccentric ring structure (2) in the length direction, and the thickness of the elastic part (5-1) decreases in the direction from the opening side of the mounting groove to the groove bottom side.

5. The variable-displacement engine oil pump of claim 2, wherein, The swing matching cavity is provided with a reset compression spring (6), and the two ends of the reset compression spring (6) are respectively abutted with the spring support structure (4) and the swing matching cavity to reset the position of the spring support structure (4).

6. A variable displacement engine oil pump according to any one of claims 2-5, characterized in that, The shaft boss (3) is provided with an inwardly recessed shaft oil channel (2-1) on the end surface of both sides thereof, and the shaft oil channel (2-1) is provided with a communicating oil groove (2-4) in communication with the position of the outer side wall of the shaft boss (3).

7. The variable-dispersion engine oil pump of claim 6, wherein, The eccentric ring structure (2) is provided with an inwardly recessed first side oil channel (2-2) at the inner side opening edge thereof adjacent to the shaft boss (3), and the first side oil channel (2-2) is in communication with the shaft oil channel (2-1).

8. The variable-dispersion engine oil pump of claim 6, wherein, The eccentric ring structure (2) is provided with an inwardly recessed second side oil passage (2-3) at the inner side edge of the position adjacent to the spring support structure (4), and the second side oil passage (2-3) is provided with a slot communicating with the position of the outer side wall of the eccentric ring structure (2).

9. A vehicle comprising a vehicle body and a power pack, characterised in that, The power assembly includes a variable-displacement engine oil pump as claimed in any one of claims 1-8.

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