Engine end cover integrated oil pump

Abstract

The invention provides an engine end cover integrated oil pump. The engine end cover integrated oil pump comprises an oil pump body; a through hole is formed in the pump cover in the thickness direction, the oil supply channel of the oil pump body is covered with the pump cover, and the oil supply channel of the oil pump body communicates with the through hole; the oil inlet pipe comprises a pipe part and an end part; one end of the pipe part is connected with the engine oil supply interface, and the other end is connected with the through hole; the end part is positioned at one end of the pipe part and is formed by outwards extending from one end of the pipe part along the radial direction of the pipe part, or the engine oil supply interface forms the end part; the oil pump driving structure is arranged on the pipe part of the oil inlet pipe and the outer side of the through hole of the pump cover, and is clamped between the end part of the oil inlet pipe and the pump cover; and the oil supply channel of the oil pump body and the oil pump driving structure are partially overlapped along the projection in the thickness direction of the pump cover. Compared with the prior art, the efficiency of the end cover integrated type oil pump is improved under the conditions that parts are changed as few as possible, and influences / interferences on other peripheral parts or equipment are as small as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engine lubrication, and particularly to an engine end cover integrated oil pump.

Background Art

[0002] In the prior art, many diesel engines adopt an end cover integrated oil pump. Due to limitations such as the positions of the engine crankshaft, cylinder block, gear train, and oil pump inlet and outlet ports, the space is limited, and it is difficult to arrange a variable displacement oil pump solution without changing the original installation boundaries.

[0003] More specifically, for an engine end cover integrated oil pump, since the engine crankshaft, the corresponding power source structure, the oil passage on the oil pump body, and the position / size of the engine oil supply interface are all predetermined, the oil pump can only be designed within the limited boundaries, which limits the space for the oil pump drive structure. The too-small space results in a small gear and a too-high transmission ratio, so that the oil pump cannot operate in the optimal efficiency range (i.e., the efficiency is low). According to the traditional design concept, it is no longer possible to further improve the efficiency of the oil pump at this time. Otherwise, it is necessary to change the oil passage on the oil pump body and the position of the engine oil supply interface, so as to make room for the oil pump drive structure. However, the engine may not have a modifiable space, or even if it does, it is obvious that the structures such as the oil pump and the engine that cooperate with the oil pump need to be changed, which will greatly increase the cost, and this is unacceptable to the vehicle manufacturer.

[0004] Therefore, it is necessary to propose a new technical solution to overcome the above problems.

Summary of the Invention

[0005] The object of the present invention is to provide an engine end cover integrated oil pump, which can improve the efficiency of the end cover integrated oil pump while changing as few components as possible and minimizing the impact / interference on the surrounding other components or equipment.

[0006] To achieve the object of the invention, according to one aspect of the present invention, there is provided an engine end cover integrated oil pump, which comprises: an oil pump body for pumping oil to the moving parts of the engine, and the oil pump body also serves as an engine end cover; a pump cover provided with a through hole in the thickness direction, the through hole penetrating the pump cover, the pump cover covering the oil supply channel of the oil pump body, and the oil supply channel of the oil pump body communicating with the through hole; an inlet pipe including a pipe portion and an end portion; one end of the pipe portion of the inlet pipe is connected to an engine oil supply interface, and the other end of the pipe portion of the inlet pipe is connected to the through hole of the pump cover; the end portion of the inlet pipe is located at one end of the pipe portion and extends radially outward from one end of the pipe portion, or the engine oil supply interface forms the end portion; an oil pump drive structure disposed outside the pipe portion of the inlet pipe and the through hole of the pump cover, and the oil pump drive structure is clamped between the end portion of the inlet pipe and the pump cover; the oil supply channel of the oil pump body and the projection of the oil pump drive structure in the thickness direction of the pump cover partially overlap.

[0007] Compared with the prior art, the present invention can improve the efficiency of the end cover integrated oil pump with as few parts changed as possible and with as little impact / interference on the surrounding other parts or equipment as possible.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0009] Figure 1 is a schematic structural diagram of the engine end cover integrated oil pump in an embodiment of the present invention;

[0010] Figure 2 is in an embodiment of the present invention as Figure 1 shown in the partial sectional view of the engine end cover integrated oil pump;

[0011] Figure 3 is in an embodiment of the present invention as Figure 1 shown in the partial enlarged view of the engine end cover integrated oil pump;

[0012] Figure 4 is in another embodiment of the present invention as Figure 1 shown in the partial enlarged view of the engine end cover integrated oil pump.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] As used herein, the term "one embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other. Unless otherwise specified, the terms "coupled", "connected", "joined", and "connected" indicating electrical connection herein all mean directly or indirectly connected. For example, when A is connected to B, it includes both A and B being directly electrically connected and A being connected to B through electrical components or circuits.

[0015] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "front", "back", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0016] Please refer to Figure 1 shown, which is a schematic structural diagram of an engine end cover integrated oil pump in one embodiment of the present invention. Please refer to Figure 2 shown, which is a partial sectional view of the engine end cover integrated oil pump as Figure 1 shown in one embodiment of the present invention. Please refer to Figure 3 shown, which is a partially enlarged schematic view of the engine end cover integrated oil pump as Figure 1 shown in one embodiment of the present invention. Figures 1-3 The engine end cover integrated oil pump shown includes an oil pump body 110, a pump cover 120, an oil inlet pipe 130, and an oil pump drive structure 140.

[0017] Among them, the oil pump body 110 is used to pump engine oil to the moving parts of the engine, and the oil pump body 110 also serves as the engine end cover. The pump cover 120 is provided with a through hole 122 in the thickness direction, and the through hole 122 penetrates through the pump cover 120. The pump cover 120 covers the oil supply passage 112 of the oil pump body 110, and the oil supply passage 112 of the oil pump body 110 communicates with the through hole 122. The inlet pipe 130 includes a pipe portion 132 and an end portion 134. One end of the pipe portion 132 of the inlet pipe 130 is connected to the engine oil supply interface 170, and the other end of the pipe portion 132 of the inlet pipe 130 is connected to the through hole 122 of the pump cover 120; the end portion 134 of the inlet pipe 130 is located at one end of its pipe portion 132 and extends radially outward from one end of the pipe portion 132, or the engine oil supply interface 170 forms the end portion 134. The oil pump drive structure 140 is disposed outside the pipe portion 132 of the inlet pipe 130 and the through hole 122 of the pump cover 120, and the oil pump drive structure 140 is clamped between the end portion 134 of the inlet pipe 130 and the pump cover 120. In Figure 2 In the illustrated embodiment, the projection of the end portion 134 of the inlet pipe 130 and the oil pump drive structure 140 in the thickness direction of the pump cover 120 partially overlaps, and the projection of the oil supply passage 112 of the oil pump body in the thickness direction of the pump cover 120 partially overlaps with the oil pump drive structure 140.

[0018] Considering reducing the influence of the reduction of the size of the inlet pipe 130 on the flow rate, the pipe portion 132 of the inlet pipe 130 can be eccentrically arranged relative to the engine oil supply interface 170; the pipe portion 132 of the inlet pipe 130 and the through hole 122 of the pump cover 120 are eccentrically arranged relative to the oil supply passage 112 of the oil pump body 110 (as Figure 2 shown), or the pipe portion 132 of the inlet pipe 130 and the through hole 122 of the pump cover 120 are concave inward at positions adjacent to the oil pump drive structure 140; at least a part of the oil pump drive structure 140 is located in the structural space vacated after the pipe portion 132 of the inlet pipe 130 and the through hole 122 of the pump cover 120 are eccentrically arranged or concave inward. Among them, the concave inward is an arc-shaped depression in the direction away from the oil pump drive structure 140. In this way, the space can be utilized as much as possible to increase the cross-sectional area of the pipe portion 132 of the inlet pipe 130.

[0019] In Figure 2 the illustrated embodiment, the through hole 122 of the pump cover 120 includes a first communication hole 1222 and a second communication hole 1224 arranged in sequence in the thickness direction. The first communication hole 1222 and the second communication hole 1224 communicate with each other and penetrate through the pump cover 120. Among them, the first communication hole 1222 is eccentrically arranged relative to the second communication hole 1224 (as Figure 2 shown); or the first communication hole 1222 is concave inward relative to the second communication hole 1224 at a position adjacent to the oil pump drive structure 140. Figure 1The shown engine end cover integrated oil pump further includes an oil pump power source structure 150. The oil pump power source structure 150 is installed in the oil pump body 110 and is in transmission connection with the crankshaft (not shown) of the engine, and is driven by the rotation of the crankshaft. The oil pump power source structure 150 and the oil pump drive structure 140 are in transmission connection. For example, the oil pump drive structure 140 is a gear, and the transmission between the oil pump drive structure 140 and the oil pump power source structure 150 is a gear transmission.

[0020] In Figure 2 In the shown specific embodiment, the radial dimension of the first communication hole 1222 of the pump cover 120 is smaller than the radial dimension of the second communication hole 1224, and the first communication hole 1222 is more deviated from the oil pump drive structure 140 than the second communication hole 1224. In this way, the radial dimension of the pipe portion 132 of the inlet pipe 130 can be smaller than the radial dimension of the oil supply channel 112 of the oil pump body 110, and the pipe portion 132 of the inlet pipe 130 is more deviated from the oil pump drive structure 140 than the oil supply channel 112 of the oil pump body 110.

[0021] In Figure 2 In the shown specific embodiment, the other end of the pipe portion 132 of the inlet pipe 130 and the through hole 122 of the pump cover 120 are axially sealed or radially sealed by setting a sealing structure. For example, a sealing ring 160 is arranged between the pipe portion 132 of the inlet pipe 130 and the pump cover 120. In other embodiments, the other end of the pipe portion 132 of the inlet pipe 130 and the through hole 122 of the pump cover 120 can also be interference sealed. For example, interference press-fitting is adopted between the pipe portion 132 of the inlet pipe 130 and the pump cover 120.

[0022] In Figure 3 In the shown embodiment, the end portion 134 of the inlet pipe 130 is sealingly connected to the engine oil supply interface 170 (for example, sealed with a gasket), so that the oil supply channel 112 of the oil pump body 110 is communicated with the engine oil supply interface 170 through the pump cover 120 and the inlet pipe 130 in sequence. Among them, the axial projection of the pipe portion 132 of the inlet pipe 130 is completely located within the axial projections of the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110. That is to say, the inlet pipe 130 is independently arranged between the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110, and the dimension of the pipe portion 132 of the inlet pipe 130 is smaller than the dimensions of the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110 (or in other words, from the axial view, the axial projection of the pipe portion 132 of the inlet pipe 130 is completely located within the axial projections of the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110). By reducing the dimension of the inlet pipe 130, structural space is provided for the oil pump drive structure 140. Please refer to Figure 4 Shown, which is in another embodiment of the present invention as Figure 1Partial enlarged schematic view of the engine end cover integrated oil pump shown. As Figure 4 shown, a first limiting structure 114 is provided on the oil pump body 110, and a second limiting structure 124 is provided on the pump cover 120. Through the first limiting structure 114 and / or the second limiting structure 124, the inlet pipe 130 can be installed at a specified position on the oil pump body 110, which can avoid incorrect installation of the inlet pipe 130 and prevent oil leakage caused by the non - coincidence of the outer circle of the end 134 of the inlet pipe 130 and the engine oil supply interface 170.

[0023] In addition, since the inlet pipe 130 is independently arranged relative to the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110, different inlet pipes 130 can be set according to different engine oil supply interfaces 170, while the rest of the structure remains unchanged to improve the versatility of parts. For example, the diameter size of the pipe part 132 of the inlet pipe 130 can be reduced according to the actual required flow rate of the engine, and it can be designed to be non - concentric (or eccentric) with the engine oil supply interface 170, which can increase the design space of the oil pump drive structure 140, reduce its transmission ratio, and avoid too high a rotational speed of the oil pump.

[0024] In summary, for the engine end cover integrated oil pump provided by the present invention, by arranging the inlet pipe 130, the pump cover 120, and the oil pump drive structure 140 axially, and the pipe part 132 of the inlet pipe 130 is eccentric / concave relative to the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110, a larger - sized oil pump drive structure 140 can be arranged between the inlet pipe 130 and the pump cover 120 under the condition of limited planar space, and a variable - displacement oil pump can be designed. Compared with the prior art, the present invention can improve the efficiency of the end cover integrated oil pump with as few parts changed as possible and with as little impact / interference on the surrounding other parts or equipment as possible.

[0025] It should be noted that any modification made by those skilled in the art to the specific embodiments of the present invention does not depart from the scope of the claims of the present invention. Correspondingly, the scope of the claims of the present invention is not limited solely to the foregoing specific embodiments.

Claims

1. An engine end cover integrated oil pump, characterized in that: It includes: An oil pump body, which is used to pressurize the oil to the moving parts of the engine, and the oil pump body also serves as the engine end cover; A pump cover, which is provided with a through hole along the thickness direction, the through hole penetrates the pump cover, the pump cover covers the oil supply channel of the oil pump body, and the oil supply channel of the oil pump body is communicated with the through hole; An oil inlet pipe, comprising a pipe portion and an end portion; one end of the pipe portion of the oil inlet pipe is connected to the engine oil supply interface, and the other end of the pipe portion of the oil inlet pipe is connected to the through hole of the pump cover; the end portion of the oil inlet pipe is located at one end of the pipe portion and extends outwardly from the one end of the pipe portion along the radial direction of the pipe portion, or the engine oil supply interface forms the end portion; An oil pump driving structure, which is arranged on the outer side of the pipe portion of the oil inlet pipe and the through hole of the pump cover, and the oil pump driving structure is clamped between the end of the oil inlet pipe and the pump cover; The oil supply passage of the oil pump body partially overlaps with a projection of the oil pump driving structure in a thickness direction of the pump cover.

2. The engine end cover integrated oil pump according to claim 1, characterized in that: The pipe portion of the oil inlet pipe and the through hole of the pump cover are eccentrically arranged relative to the oil supply passage of the oil pump body, or the pipe portion of the oil inlet pipe and the through hole of the pump cover are concave at a position adjacent to the oil pump driving structure; At least a portion of the oil pump driving structure is located in the pipe portion of the oil inlet pipe and in the structural space left by the eccentric arrangement or indentation of the through hole of the pump cover.

3. The engine end cover integrated oil pump according to claim 2, characterized in that: The through hole of the pump cover comprises a first communicating hole and a second communicating hole sequentially arranged along the thickness direction, wherein the first communicating hole and the second communicating hole are connected to each other and penetrate the pump cover; The first communicating hole is eccentrically arranged relative to the second communicating hole; or the first communicating hole is concave relative to the second communicating hole at a position adjacent to the oil pump driving structure.

4. The engine end cover integrated oil pump according to claim 2 or 3, characterized in that: The oil pump driving structure is a gear, and the inner concave is an arc-shaped depression facing away from the oil pump driving structure.

5. The engine end cover integrated oil pump according to claim 3, characterized in that: The radial dimension of the first communicating hole is smaller than the radial dimension of the second communicating hole, and the first communicating hole is further away from the oil pump driving structure than the second communicating hole; The radial dimension of the tube portion of the oil inlet pipe is smaller than the radial dimension of the oil supply passage of the oil pump body, and the tube portion of the oil inlet pipe is further away from the oil pump driving structure than the oil supply passage of the oil pump body.

6. The engine end cover integrated oil pump according to claim 1, characterized in that: It also includes an oil pump power source structure, The oil pump power source structure is installed in the oil pump body, and the oil pump power source structure is drivingly connected to the crankshaft of the engine; The oil pump power source structure and the oil pump driving structure are transmission connected.

7. The engine end cover integrated oil pump according to claim 1, characterized in that: The other end of the tube is interference-sealed with the through hole of the pump cover; or The other end of the tube portion and the through hole of the pump cover are axially sealed or radially sealed by setting a sealing structure.

8. The engine end cover integrated oil pump according to claim 1, characterized in that: The end of the oil inlet pipe is sealed and connected to the engine oil supply interface, so that the oil supply channel of the oil pump body is connected to the engine oil supply interface through the pump cover and the oil inlet pipe in sequence.

9. The engine end cover integrated oil pump according to claim 8, characterized in that: The axial projection of the pipe portion of the oil inlet pipe is completely located within the axial projection of the engine oil supply interface and the oil supply passage of the oil pump body.

10. The engine end cover integrated oil pump according to claim 2, characterized in that: The pipe portion of the oil inlet pipe is eccentrically arranged relative to the engine oil supply interface.

11. The engine end cover integrated oil pump according to claim 1, characterized in that: The oil pump body is provided with a first limiting structure; The pump cover is provided with a second limiting structure; The oil inlet pipe is installed at a designated position on the oil pump body through the first limiting structure and / or the second limiting structure.

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