Engine end cover integrated oil pump
By eccentrically or concavely setting the oil inlet pipe and pump cover through hole in the integrated oil pump of the diesel engine end cover, the space of the oil pump drive structure is increased, and variable displacement is achieved, which solves the problem of efficiency improvement under space constraints and reduces costs.
Patent Information
- Application Number
- CN202520726953.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-16
AI Technical Summary
Existing diesel engine end cap integrated oil pumps are difficult to improve efficiency due to space constraints. Traditional designs require changes to the oil pump and engine structure, increasing costs, which is unacceptable to OEMs.
Design an engine end cover integrated oil pump. By setting the oil inlet pipe and pump cover through hole eccentrically or concavely, the space of the oil pump drive structure is increased. A variable displacement oil pump solution is adopted to improve efficiency by utilizing the existing space.
Without altering surrounding components, improve oil pump efficiency, reduce transmission ratio, minimize impact on peripheral equipment, and lower costs.
Smart Images
Figure CN223854330U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the field of vehicle engine lubrication technology, and in particular to an integrated oil pump for engine end caps. [Background Technology]
[0002] In existing technologies, many diesel engines use end cap integrated oil pumps. Due to limitations such as the crankshaft, cylinder block, gear train, and oil pump inlet / outlet positions, space is limited, making it difficult to arrange variable displacement oil pump solutions without changing the original installation boundaries.
[0003] More specifically, for oil pumps integrated into engine end caps, the engine crankshaft, corresponding power source structure, oil passages on the pump body, and the position / size of the engine fuel supply interface are all predetermined. The oil pump can only be designed within these limited boundaries, which restricts the space for the pump drive structure. Insufficient space results in smaller gears and a higher transmission ratio, preventing the pump from operating in its optimal efficiency range (i.e., lower efficiency). According to traditional design principles, it's impossible to further improve oil pump efficiency at this point. Otherwise, it would require altering the oil passages on the pump body and the position of the engine fuel supply interface to make room for the pump drive structure. However, the engine may not have the space for modification, or even if it does, it would obviously require changing the oil pump and other structures that work in conjunction with it, significantly increasing costs—an unacceptable prospect for OEMs.
[0004] Therefore, it is necessary to propose a new technical solution to overcome the above problems. [Utility Model Content]
[0005] The purpose of this invention is to provide an engine end cap integrated oil pump that can improve the efficiency of the end cap integrated oil pump while changing as few parts as possible and minimizing the impact / interference on other surrounding parts or equipment.
[0006] To achieve the purpose of the invention, according to one aspect of the present invention, an engine end cover integrated oil pump is provided, comprising: an oil pump body for pumping oil to moving parts of the engine, and the oil pump body also serving as an engine end cover; a pump cover having a through hole along its 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; and an oil inlet pipe including a pipe section and an end; one end of the pipe section of the oil inlet pipe is connected to the engine oil supply interface. The oil inlet pipe is connected to the through hole of the pump cover at one end; the end of the oil 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 fuel supply interface forms the end; an oil pump drive structure is disposed outside the pipe portion of the oil inlet pipe and the through hole of the pump cover, and the oil pump drive structure is clamped between the end of the oil inlet pipe and the pump cover; the oil supply channel of the oil pump body overlaps with the projection portion of the oil pump drive structure along the thickness direction of the pump cover.
[0007] Compared with the prior art, this invention can improve the efficiency of the end cap integrated oil pump while changing as few parts as possible and minimizing the impact / interference on other surrounding parts or equipment. [Attached Image Description]
[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0009] Figure 1 This is a schematic diagram of the structure of the engine end cover integrated oil pump in one embodiment of the present invention;
[0010] Figure 2 In one embodiment of this utility model, as Figure 1 The diagram shows a partial cross-sectional view of the integrated oil pump in the engine end cover.
[0011] Figure 3 In one embodiment of this utility model, as Figure 1 A partially enlarged schematic diagram of the integrated oil pump on the engine end cover is shown.
[0012] Figure 4 In another embodiment of this utility model, such as Figure 1 The diagram shows a partially enlarged view of the integrated oil pump on the engine end cover.
Detailed Implementation Methods
[0013] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0014] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Unless otherwise specified, the terms coupling, connection, linking, and interconnection used herein to indicate electrical connection mean direct or indirect connection. For example, A being connected to B includes both a direct electrical connection between A and B and a connection between A and B via electrical components or circuits.
[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "back", "positive", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0016] Please refer to Figure 1 The diagram shown is a structural schematic of an integrated oil pump in the engine end cover according to one embodiment of this utility model. Please refer to it. Figure 2 As shown, this is one embodiment of the present invention. Figure 1 The diagram shows a partial cross-sectional view of the oil pump integrated into the engine end cover. Please refer to the provided text. Figure 3 As shown, this is one embodiment of the present invention. Figure 1 The diagram shows a partially enlarged view of the integrated oil pump on the engine end cover. 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] The oil pump body 110 is used to pressurize engine oil to the moving parts of the engine, and also serves as an engine end cover. The pump cover 120 has a through hole 122 along its thickness direction, which penetrates the pump cover 120. The pump cover 120 covers the oil supply channel 112 of the oil pump body 110, and the oil supply channel 112 of the oil pump body 110 communicates with the through hole 122. The oil inlet pipe 130 includes a pipe section 132 and an end section 134. One end of the pipe section 132 of the oil inlet pipe 130 is connected to the engine oil supply interface 170, and the other end of the pipe section 132 is connected to the through hole 122 of the pump cover 120. The end section 134 of the oil inlet pipe 130 is located at one end of its pipe section 132 and extends radially outward from one end of the pipe section 132, or the engine oil supply interface 170 forms the end section 134. The oil pump drive structure 140 is disposed outside the pipe portion 132 of the oil 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 oil inlet pipe 130 and the pump cover 120. Figure 2 In the embodiment shown, the end 134 of the oil inlet pipe 130 and the projection portion of the oil pump drive structure 140 along the thickness direction of the pump cover 120 overlap, and the oil supply channel 112 of the oil pump body overlaps with the projection portion of the oil pump drive structure 140 along the thickness direction of the pump cover 120.
[0018] To minimize the impact of the reduced size of the oil inlet pipe 130 on the flow rate, the pipe section 132 of the oil inlet pipe 130 can be offset relative to the engine fuel supply interface 170; the pipe section 132 of the oil inlet pipe 130 and the through hole 122 of the pump cover 120 can be offset relative to the fuel supply channel 112 of the oil pump body 110 (e.g.) Figure 2 (As shown), or the pipe portion 132 of the oil inlet pipe 130 and the through hole 122 of the pump cover 120 are recessed at a position adjacent to the oil pump drive structure 140; at least a portion of the oil pump drive structure 140 is located within the structural space created by the eccentric setting or recess of the pipe portion 132 of the oil inlet pipe 130 and the through hole 122 of the pump cover 120. The recess is an arc-shaped indentation moving away from the oil pump drive structure 140. This maximizes the use of space to increase the cross-sectional area of the pipe portion 132 of the oil inlet pipe 130.
[0019] exist Figure 2 In the illustrated embodiment, the through hole 122 of the pump cover 120 includes a first connecting hole 1222 and a second connecting hole 1224 sequentially arranged along the thickness direction. The first connecting hole 1222 and the second connecting hole 1224 are interconnected and penetrate the pump cover 120. The first connecting hole 1222 is eccentrically positioned relative to the second connecting hole 1224 (e.g., ...). Figure 2 (as shown); or the first connecting hole 1222 is recessed relative to the second connecting hole 1224 at a position adjacent to the oil pump drive structure 140. Figure 1The engine end cover integrated oil pump shown also includes an oil pump power source structure 150, which is installed in the oil pump body 110. The oil pump power source structure 150 is connected to 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 connected, for example, the oil pump drive structure 140 is a gear, and the oil pump drive structure 140 and the oil pump power source structure 150 are connected by gear transmission.
[0020] exist Figure 2 In the specific embodiment shown, the radial dimension of the first connecting hole 1222 of the pump cover 120 is smaller than the radial dimension of the second connecting hole 1224, and the first connecting hole 1222 is further away from the oil pump drive structure 140 than the second connecting hole 1224. This allows the radial dimension of the pipe portion 132 of the oil inlet pipe 130 to 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 oil inlet pipe 130 to be further away from the oil pump drive structure 140 than the oil supply channel 112 of the oil pump body 110.
[0021] exist Figure 2 In the specific embodiment shown, the other end of the pipe portion 132 of the oil inlet pipe 130 is axially or radially sealed to the through hole 122 of the pump cover 120 by providing a sealing structure. For example, a sealing ring 160 is provided between the pipe portion 132 of the oil inlet pipe 130 and the pump cover 120. In other embodiments, the other end of the pipe portion 132 of the oil inlet pipe 130 and the through hole 122 of the pump cover 120 can also be an interference seal. For example, an interference fit is used between the pipe portion 132 of the oil inlet pipe 130 and the pump cover 120.
[0022] exist Figure 3 In the illustrated embodiment, the end 134 of the oil inlet pipe 130 is sealed to the engine fuel supply interface 170 (e.g., sealed with a gasket), so that the fuel supply channel 112 of the oil pump body 110 is connected to the engine fuel supply interface 170 in sequence via the pump cover 120 and the oil inlet pipe 130. The axial projection of the pipe portion 132 of the oil inlet pipe 130 is completely within the axial projection of the engine fuel supply interface 170 and the fuel supply channel 112 of the oil pump body 110. In other words, an oil inlet pipe 130 is independently provided between the engine fuel supply interface 170 and the fuel supply channel 112 of the fuel pump body 110. The size of the pipe portion 132 of the oil inlet pipe 130 is smaller than the size of the engine fuel supply interface 170 and the fuel supply channel 112 of the fuel pump body 110 (or, in other words, from an axial perspective, the axial projection of the pipe portion 132 of the oil inlet pipe 130 is completely within the axial projection of the engine fuel supply interface 170 and the fuel supply channel 112 of the fuel pump body 110). By reducing the size of the oil inlet pipe 130, structural space is made up for the fuel pump drive structure 140. Please refer to... Figure 4 As shown, this is another embodiment of the present invention. Figure 1The diagram shows a partially enlarged view of the integrated oil pump on the engine end cover. Figure 4 As shown, the oil pump body 110 is provided with a first limiting structure 114, and the pump cover 120 is provided with a second limiting structure 124. The first limiting structure 114 and / or the second limiting structure 124 can make the oil inlet pipe 130 installed at a designated position on the oil pump body 110, which can avoid incorrect installation of the oil inlet pipe 130 and prevent oil leakage caused by the outer circle of the end 134 of the oil inlet pipe 130 not coinciding with the engine oil supply interface 170.
[0023] Furthermore, since the oil inlet pipe 130 is independently configured relative to the engine fuel supply interface 170 and the fuel supply channel 112 of the oil pump body 110, different oil inlet pipes 130 can be configured according to different engine fuel supply interfaces 170, while the rest of the structure remains unchanged to improve the versatility of components. For example, the diameter of the pipe section 132 of the oil inlet pipe 130 can be reduced according to the actual flow requirements of the engine, and its design can be made non-concentric (or eccentric) with the engine fuel supply interface 170. This can increase the design space of the oil pump drive structure 140, reduce its transmission ratio, and avoid excessive oil pump speed.
[0024] In summary, the engine end-cover integrated oil pump provided by this utility model, by axially arranging the oil inlet pipe 130, pump cover 120, and oil pump drive structure 140, and with the pipe portion 132 of the oil inlet pipe 130 eccentrically / concavely positioned relative to the engine oil supply interface 170 and the oil supply channel 112 of the oil pump body 110, allows for the placement of a larger oil pump drive structure 140 between the oil inlet pipe 130 and pump cover 120, thus designing a variable displacement oil pump, even with limited planar space. Compared with the prior art, this utility model can improve the efficiency of the end-cover integrated oil pump while changing as few components as possible and minimizing the impact / interference on surrounding components or equipment.
[0025] It should be noted that any modifications made by those skilled in the art to the specific embodiments of this utility model do not depart from the scope of the claims of this utility model. Accordingly, the scope of the claims of this utility model is not limited to the foregoing specific embodiments.
Claims
1. An engine end cover integrated oil pump characterized by, It comprises: an oil pump body for pressurizing engine oil to moving parts of an 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 an oil supply passage of the oil pump body, and the oil supply passage of the oil pump body communicating 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 with an engine oil supply interface, the other end of the pipe portion of the oil inlet pipe is connected with 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 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 provided outside 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 portion of the oil inlet pipe and the pump cover; the oil supply passage of the oil pump body overlaps with the projected part of the oil pump driving structure in the thickness direction of the pump cover.
2. The engine end cover integrated oil pump according to claim 1, wherein: 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 recessed in the position adjacent to the oil pump driving structure; at least a part of the oil pump driving structure is located in the structural space left by the eccentric arrangement or recess of the pipe portion of the oil inlet pipe and the through hole of the pump cover.
3. The engine end cover integrated oil pump according to claim 2, wherein: the through hole of the pump cover comprises a first communication hole and a second communication hole arranged in sequence in the thickness direction, and the first communication hole and the second communication hole communicate with each other and penetrate the pump cover; the first communication hole is eccentrically arranged relative to the second communication hole; or the first communication hole is recessed relative to the second communication hole in the position adjacent to the oil pump driving structure.
4. The engine end cover integrated oil pump according to claim 2 or 3, wherein: the oil pump driving structure is a gear, and the recess is an arc-shaped recess away from the oil pump driving structure.
5. The engine end cover integrated oil pump according to claim 3, wherein: the radial dimension of the first communication hole is smaller than the radial dimension of the second communication hole, and the first communication hole is more deviated from the oil pump driving structure than the second communication hole; the radial dimension of the pipe portion of the oil inlet pipe is smaller than the radial dimension of the oil supply passage of the oil pump body, and the pipe portion of the oil inlet pipe is more deviated from the oil pump driving structure than the oil supply passage of the oil pump body.
6. The engine end cover integrated oil pump of claim 1, wherein, It further comprises an oil pump power source structure, the oil pump power source structure is mounted in the oil pump body, and the oil pump power source structure is in driving connection with the crankshaft of the engine; the oil pump power source structure and the oil pump driving structure are in driving connection.
7. The engine end cover integrated oil pump according to claim 1, wherein: the other end of the pipe portion is interference sealed with the through hole of the pump cover; or the other end of the pipe portion is axially sealed or radially sealed with the through hole of the pump cover by arranging a sealing structure.
8. The engine end cover integrated oil pump of claim 1, wherein an end of the oil inlet pipe is sealingly connected to an engine oil supply interface, so that an oil supply passage of the oil pump body is in communication with the engine oil supply interface through the pump cover and the oil inlet pipe.
9. The engine end cover integrated oil pump of claim 8, wherein an axial projection of the pipe portion of the oil inlet pipe is entirely within axial projections of the engine oil supply interface and the oil supply passage of the oil pump body.
10. The engine end cover integrated oil pump of claim 2, wherein 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 of claim 1, wherein a first limiting structure is arranged on the oil pump body; a second limiting structure is arranged on the pump cover; and the oil inlet pipe is installed at a specified position on the oil pump body through the first limiting structure and / or the second limiting structure.