Large-flow oil pump shell structure

Abstract

The utility model provides a large-flow oil pump shell structure which comprises a cylindrical shell body, a rotor cavity is arranged in the shell body, one end of the shell body is closed, the other end of the shell body is open, an oil inlet hole is formed in the closed end of the shell body, an oil outlet hole is formed in the middle of the shell body, an oil inlet groove communicated with the oil inlet hole is formed in the inner wall of the shell body, and an oil outlet groove communicated with the oil outlet hole is formed in the outer wall of the shell body. A first groove communicated with the oil outlet groove is formed in the inner wall of the closed end face, provided with the oil inlet hole, of the outer shell. The oil outlet is formed in the middle of the shell, the oil inlet groove and the oil outlet groove are additionally formed in the middle of the shell, and after the inner rotor and the outer rotor are installed in the rotor cavity, the purposes of feeding oil from the two ends of the rotor and discharging oil from the middle of the pump body can be achieved, and oil pump flow is increased.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil pump, in particular to a large-flow oil pump housing structure, which is an electronic oil pump body used for automobile lubrication systems or cooling systems, machine tool lubrication systems or other hydraulic systems. Background Art

[0002] The automotive industry is rapidly developing. As vehicles evolve towards safer, more reliable, more stable, fully automated, intelligent, environmentally friendly, and energy-efficient performance, electronic oil pumps are widely used in automotive lubrication and / or cooling systems, effectively meeting market demands. Electronic oil pumps primarily provide power for these systems.

[0003] Cycloidal rotor pumps are widely used in the lubrication systems of vehicles and marine equipment due to their many advantages, including compact structure, smooth operation, low pulsation, and high volumetric efficiency. Currently, electronic oil pumps used in the new automotive market, such as those with Chinese Patent Application No. 202010969091.5 and Chinese Patent Application No. 201810519275.4, generally adopt a single-sided oil inlet. After the oil enters the pump housing through the oil inlet, it enters between the inner and outer rotors from one end. The oil inlet flow is relatively small. During the speed change process of the internal combustion engine, the oil pump changes with the speed, and the oil supply and pressure will also change accordingly, resulting in some unstable factors. The oil supply is usually insufficient, which cannot meet the rapid cooling and lubrication needs of the new automotive market. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the utility model provides a large-flow oil pump housing structure. After the cycloid rotor pump enters the oil pump housing through the oil inlet hole, the oil is divided into two paths and simultaneously enters the oil through the two ends of the inner and outer rotors, thereby increasing the oil flow channel and reducing the flow resistance. At the same time, the difference between the maximum and minimum areas of the closed cavities of the inner and outer rotors is increased, thereby increasing the displacement of the pump, improving the oil pump flow, and achieving the effect of rapid cooling and lubrication.

[0005] In order to achieve the above technical objectives, the utility model provides a large-flow oil pump housing structure, including a cylindrical outer shell, a rotor cavity is provided in the outer shell, one end of the outer shell is closed and the other end is open, an oil inlet hole is provided at the closed end of the outer shell, an oil outlet hole is provided in the middle of the outer shell, an oil inlet groove connected to the oil inlet hole and an oil outlet groove connected to the oil outlet hole are provided on the inner wall of the outer shell, and a first groove connected to the oil outlet groove is provided on the inner wall of the closed end surface of the outer shell where the oil inlet hole is provided.

[0006] A further technical solution of the utility model: it also includes an intermediate body arranged on the open end surface of the outer shell, the open end surface of the outer shell is provided with a plurality of bolt holes, the intermediate body is connected to the outer shell by bolts, and a rotor cavity is formed between the intermediate body and the outer shell; a second groove and a third groove are provided on one side of the intermediate body adjacent to the rotor cavity, the second groove is arranged at a position matching the oil inlet hole and is connected to the oil inlet groove, the third groove is connected to the oil outlet groove, and the oil outlet groove leads to the oil outlet hole.

[0007] A better technical solution of the present utility model is that the oil outlet hole is arranged in a waist-shaped shape.

[0008] A better technical solution of the present utility model is as follows: a rotating shaft hole is provided at the center of the intermediate body, and the second groove and the third groove are distributed on both sides of the rotating shaft hole.

[0009] A better technical solution of the present invention is as follows: a rotating shaft mounting groove is provided at the center of the closed end surface of the outer shell, and the oil inlet hole and the first groove are distributed on both sides of the rotating shaft mounting groove.

[0010] A better technical solution of the present invention is: the rotor cavity is used to install the inner rotor and the outer rotor, and after the inner rotor and the outer rotor are installed, the oil inlet hole, the first groove, the second groove and the third groove are all connected to the working cavity between the inner and outer rotors.

[0011] The better technical solution of the present utility model is: the third groove is arranged to be arc-shaped, the oil outlet groove is located on the outer arc surface of one end of the third groove, and a third outward-expanding groove is provided at the position of the third groove corresponding to the oil outlet groove, and is connected to the oil outlet groove through the third outward-expanding groove.

[0012] A better technical solution of the present utility model: the oil inlet hole is an arc-shaped hole with the rotating shaft mounting groove as the center, the oil inlet groove is located on the outer arc surface at one end of the oil inlet hole, and a first outward-expanding groove is provided at the position of the oil inlet hole corresponding to the oil inlet groove, and is connected to the oil inlet groove through the first outward-expanding groove; the second groove has the same shape as the oil inlet hole and corresponds to the position.

[0013] The better technical solution of the present utility model is as follows: the shape of the first groove is an arc-shaped groove similar to the oil inlet hole, the oil outlet groove is located on the outer arc surface of one end of the first groove, and a second outward-expanding groove is provided at the position of the first groove corresponding to the oil outlet groove, and is connected to the oil outlet groove through the second outward-expanding groove.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides an oil inlet groove and an oil outlet groove on the inner wall of the shell, the oil inlet groove is connected with the oil inlet port, and an oil inlet groove connected with the oil inlet groove and an oil outlet groove connected with the oil outlet groove are correspondingly provided on the intermediate body base. When the inner and outer rotors are installed in the rotor cavity of the shell, the groove on the intermediate body base and the groove on the outer body are both connected with the working cavity between the inner and outer rotors. A part of the oil entering the outer body through the oil inlet hole directly enters between the inner and outer rotors through the oil inlet hole end, and the other part flows into the oil inlet side groove on the bottom intermediate body through the oil inlet groove, and then enters the working cavity between the inner and outer rotors from the other end of the inner and outer rotors; the purpose of oil inlet at both ends is achieved, thereby increasing the oil inlet amount, playing a role of rapid cooling and lubrication, and solving the demand for large-flow electronic oil pumps in the new automobile market. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the outer shell of the utility model;

[0017] Figure 2 yes Figure 1 Middle top view;

[0018] Figure 3 yes Figure 1 Middle bottom view;

[0019] Figure 4 It is a schematic structural diagram of the intermediate in the utility model;

[0020] Figure 5 This is a top view of the utility model after assembling the inner and outer rotors;

[0021] Figure 6 yes Figure 5 Middle AA section view.

[0022] In the figure: 1—outer shell, 100—rotor mounting groove, 2—rotor cavity, 3—oil inlet groove, 4—oil outlet groove, 5—oil outlet hole, 6—oil inlet hole, 600—first outward-expanding groove, 7—first groove, 700—first outward-expanding groove, 8—intermediate body, 800—rotor shaft hole, 9—bolt hole, 10—second groove, 11—third groove, 1100—third outward-expanding groove, 12—inner rotor, 13—outer rotor, 14—drive shaft. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 6The accompanying drawings are simplified examples and are intended solely to clearly and concisely illustrate the embodiments of the present invention. The technical solutions presented in the accompanying drawings are specific examples of the present invention and are not intended to limit the scope of the claimed invention. All other examples derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is typically placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] The embodiment provides a large flow oil pump housing structure, such as Figures 1 to 6 As shown, it includes a cylindrical outer shell 1 and an intermediate body 8. The outer shell 1 is closed at one end and open at the other end. The open end surface of the outer shell 1 is provided with multiple bolt holes 9. The intermediate body 8 is connected to the outer shell 1 by bolts, and a rotor cavity 2 is formed between the intermediate body 8 and the outer shell 1. An oil inlet hole 6 is provided at the closed end of the outer shell 1, an oil outlet hole 5 is provided in the middle of the outer shell 1, an oil inlet groove 3 connected to the oil inlet hole 6, and an oil outlet groove 4 connected to the oil outlet hole 5 are provided on the inner wall of the outer shell 1. A first groove 7 connected to the oil outlet groove 4 is provided on the inner wall of the closed end surface of the outer shell 1 with the oil inlet hole 6. A second groove 10 and a third groove 11 are provided on the side of the intermediate body 8 adjacent to the rotor cavity 2. The second groove 10 is set at a position matching the oil inlet hole 6 and connected to the oil inlet groove 3. The third groove 11 is connected to the oil outlet groove 4, and the oil outlet groove 4 leads to the oil outlet hole 5. The housing structure is used for a cycloidal rotor pump. An inner rotor 12 and an outer rotor 13 are rotatably mounted within the rotor cavity 2. After the inner rotor 12 and the outer rotor 13 are installed, the oil inlet 6, the first groove 7, the second groove 10, and the third groove 11 are all connected to the working chamber between the inner and outer rotors. The oil outlet 5 is configured in an oblong shape.

[0026] The embodiment provides a large flow oil pump housing structure, such as Figures 1 to 6As shown, a shaft mounting groove 100 is provided at the center of the closed end face of the outer shell 1. The oil inlet hole 6 and the first groove 7 are distributed on both sides of the shaft mounting groove 100, and the oil inlet hole 6 and the first groove 7 are arranged approximately symmetrically. The oil inlet hole 6 is an arc-shaped hole with the shaft mounting groove 100 as the center. The oil inlet groove 3 is located on the outer arc surface of one end of the oil inlet hole 6, and the oil inlet hole 6 is provided with a first outward-expanding groove 600 at a position corresponding to the oil inlet groove 3, and is connected to the oil inlet groove 3 through the first outward-expanding groove 600. The second groove 10 has the same shape as the oil inlet hole 6 and is located in a corresponding position. The first groove 7 is an arc-shaped groove similar in shape to the oil inlet hole 6. The oil outlet groove 4 is located on the outer arc surface of one end of the first groove 7, and the first groove 7 is provided with a second outward-expanding groove 700 at a position corresponding to the oil outlet groove 4, and is connected to the oil outlet groove 4 through the second outward-expanding groove 700. The center of the intermediate body 8 is provided with a rotation axis hole 800. The second groove 10 and the third groove 11 are distributed on both sides of the rotation axis hole 800, and the second groove 10 and the third groove 11 are arranged approximately symmetrically. The third groove 11 is configured in an arc shape. The oil outlet groove 4 is located on the outer arc surface of one end of the third groove 11. A third outward-expanding groove 1100 is provided at the position of the third groove 11 corresponding to the oil outlet groove 4, and is connected to the oil outlet groove 4 through the third outward-expanding groove 1100.

[0027] In this embodiment, the oil inlet hole 6 and the second groove 10 are located at opposite ends of the oil inlet groove 3 and communicate through the oil inlet groove 3. A portion of the oil entering through the oil inlet hole 6 flows through the oil inlet groove 3 into the second groove 10, and then enters the working chamber between the inner and outer rotors from the other end, thereby achieving bidirectional oil inflow. The third groove 11 and the first groove 7 are located at opposite ends of the oil outlet groove 4 and communicate through the oil outlet groove 4. The oil in the working chamber between the inner and outer rotors can enter the oil outlet groove 4 through the first groove 7 and the third groove 11, respectively, and then flow out through the oil outlet hole 5.

[0028] The shapes of the first groove 7, the second groove 10, the third groove 11 and the oil inlet 6 in the embodiment are similar and can be set to an irregular arc shape, similar to an arc shape. Because of the setting of the outward-expanding groove, each groove and the oil inlet hole forms a special-shaped structure with one end narrow and the other end wide.

[0029] The large flow oil pump housing structure in the embodiment is specifically used, such as Figure 5 and Figure 6As shown, the motor's drive shaft 14 passes through the shaft hole 8 in the intermediate body 8 and is rotatably connected to the inner and outer rotors within the rotor cavity 2, thereby controlling the rotation of the inner and outer rotors within the rotor cavity 2. The drive shaft 14 extends into the middle of the rotor cavity; the outer rotor 2 and inner rotor 3 are rotatably mounted within the rotor cavity, with the inner rotor 3 sheathed around the drive shaft 4, and the outer rotor 2 sheathed around the inner rotor 3, forming a working chamber between the inner rotor 3 and the outer rotor 2. The oil inlet hole 6 is connected to the working chamber, and the engine oil enters the outer shell 1 through the oil inlet hole 6 at the end of the outer shell 1. A part of the oil entering the outer shell 1 directly enters the working chamber between the inner rotor 3 and the outer rotor 2 from the end of the oil inlet hole 6, and the other part enters the oil inlet groove 3 connected to the oil inlet hole 6, and then flows into the second groove 10 at the bottom of the oil inlet groove 3. During the rotation of the inner and outer rotors, the oil inlet port of the working chamber will become larger, and then the oil in the second groove 10 will also enter the working chamber. At the same time, the oil outlet side of the working chamber will become smaller, and the oil on the oil outlet side will be squeezed into the first groove 7 and the third groove 11, and then enter the oil outlet groove 4 through the first groove 7 and the third groove 11, and finally flow out through the oil outlet hole 5, completing the whole process.

[0030] The above is merely one embodiment of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A large flow oil pump housing structure, comprising a cylindrical outer shell (1), a rotor cavity (2) provided in the outer shell (1), characterized in that: One end of the outer shell (1) is closed and the other end is open. An oil inlet hole (6) is provided at the closed end of the outer shell (1), an oil outlet hole (5) is provided in the middle of the outer shell (1), an oil inlet groove (3) communicating with the oil inlet hole (6) and an oil outlet groove (4) communicating with the oil outlet hole (5) are provided on the inner wall of the outer shell (1), and a first groove (7) communicating with the oil outlet groove (4) is provided on the inner wall of the closed end surface of the outer shell (1) where the oil inlet hole (6) is provided.

2. The large flow oil pump housing structure according to claim 1, characterized in that: The invention also includes an intermediate body (8) arranged on the open end surface of the outer shell (1), the open end surface of the outer shell (1) is provided with a plurality of bolt holes (9), the intermediate body (8) is connected to the outer shell (1) by bolts, and a rotor cavity (2) is formed between the intermediate body (8) and the outer shell (1); a second groove (10) and a third groove (11) are provided on a side of the intermediate body (8) adjacent to the rotor cavity (2), the second groove (10) is arranged at a position matching the oil inlet hole (6) and is communicated with the oil inlet groove (3), the third groove (11) is communicated with the oil outlet groove (4), and the oil outlet groove (4) leads to the oil outlet hole (5).

3. A large flow oil pump housing structure according to claim 1 or 2, characterized in that: The oil outlet hole (5) is configured to be in a waist-shaped shape.

4. The large flow oil pump housing structure according to claim 2, characterized in that: A rotating shaft mounting groove (100) is provided at the center of the closed end surface of the outer shell (1), and the oil inlet hole (6) and the first groove (7) are distributed on both sides of the rotating shaft mounting groove (100).

5. The large flow oil pump housing structure according to claim 2, characterized in that: The rotor cavity (2) is used to install the inner rotor (12) and the outer rotor (13), and after the inner rotor (12) and the outer rotor (13) are installed, the oil inlet hole (6), the first groove (7), the second groove (10) and the third groove (11) are all connected to the working cavity between the inner and outer rotors.

6. The large flow oil pump housing structure according to claim 2, characterized in that: A rotating shaft hole (800) is provided at the center of the intermediate body (8), and the second groove (10) and the third groove (11) are distributed on both sides of the rotating shaft hole (800).

7. The large flow oil pump housing structure according to claim 2, characterized in that: The third groove (11) is arranged in an arc shape, the oil outlet groove (4) is located on the outer arc surface of one end of the third groove (11), and a third outward-expanding groove (1100) is provided at a position of the third groove (11) corresponding to the oil outlet groove (4), and is connected to the oil outlet groove (4) as a whole through the third outward-expanding groove (1100).

8. The large flow oil pump housing structure according to claim 2, characterized in that: The oil inlet hole (6) is an arc-shaped hole with the rotating shaft mounting groove (100) as the center. The oil inlet groove (3) is located on the outer arc surface of one end of the oil inlet hole (6). A first outward-expanding groove (600) is provided at a position of the oil inlet hole (6) corresponding to the oil inlet groove (3), and is connected to the oil inlet groove (3) through the first outward-expanding groove (600). The second groove (10) has the same shape as the oil inlet hole (6) and corresponds to the position.

9. The large flow oil pump housing structure according to claim 8, characterized in that: The first groove (7) is shaped like an arc-shaped groove similar to the oil inlet hole (6); the oil outlet groove (4) is located on the outer arc surface of one end of the first groove (7); and a second outward-expanding groove (700) is provided at a position of the first groove (7) corresponding to the oil outlet groove (4), and is connected to the oil outlet groove (4) through the second outward-expanding groove (700).

Images