Machine body for installing built-in oil pump

Abstract

The utility model provides a machine body for installing a built-in oil pump, and belongs to the technical field of engines. Comprising an engine shell, an oil suction pipe is connected to the engine shell, a pump mounting cavity is formed in the engine shell, a first rotor and a second rotor are rotationally arranged in the pump mounting cavity, the second rotor is eccentrically arranged in a second mounting cavity in the first rotor, and a plurality of oil suction grooves are formed in the inner wall of the second mounting cavity; extrusion protrusions matched with the oil suction grooves are arranged on the outer wall of the second rotor in the circumferential direction of the second rotor. The engine shell is provided with an oil inlet flow channel, the oil suction pipe is connected with one end of the oil inlet flow channel, and the oil inlet flow channel and the main flow channel are communicated with the two side faces of the pump installation cavity respectively. In the process that the second rotor rotates along with starting of the engine, the second rotor is matched with the first rotor to suck engine oil from the oil suction pipe and then pump the engine oil into the main oil duct, the engine oil pump is integrally installed in the engine shell, and the effect that the installation space of the structure of the engine side on a vehicle is simplified is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a body for installing a built-in oil pump. Background Art

[0002] The oil pump is a device that provides high-pressure oil to equipment and is widely used in engines. The diesel engine oil pump is mostly installed in the oil pan, and its transmission method is to use the rotation of the engine camshaft for gear transmission. However, this type of oil pump has the disadvantages of large oil pump volume and large installation interface space requirements, making the structure on the engine side bloated. Utility Model Content

[0003] In view of the above problems, the utility model provides a body for installing a built-in oil pump.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0005] Provided is a body for installing a built-in oil pump, comprising an engine housing, an oil suction pipe connected to an external engine oil pan is connected to the engine housing, a main oil passage communicated with the oil suction pipe is arranged in the engine housing, a pump installation cavity is arranged in the engine housing, a first rotor is rotatably arranged in the pump installation cavity, a second installation cavity is coaxially opened on the first rotor, a second rotor is rotatably arranged in the pump installation cavity, the second rotor is eccentrically arranged in the second installation cavity, a plurality of oil suction grooves are evenly opened on the inner wall of the second installation cavity along the circumference of the first rotor, an extrusion protrusion matched with the oil suction groove is arranged on the outer wall of the second rotor along the circumference of the second rotor, and the extrusion protrusion on the second rotor cooperates with the oil suction groove on the first rotor;

[0006] One end of the second rotor extends out of the engine casing, and an oil inlet channel is provided on the engine casing. The oil suction pipe is connected to one end of the oil inlet channel, and the oil inlet channel and the main oil channel are respectively connected at two side surfaces of the pump mounting cavity, and the main oil channel is connected and aligned at the matching position of the second rotor and the first rotor, and the oil inlet channel is connected and aligned at the widest gap between the second rotor and the first rotor.

[0007] Furthermore, a mounting opening penetrating the engine casing is provided on a side of the pump mounting cavity away from the main oil channel, and a removable oil pump cover for closing the mounting opening of the pump mounting cavity is provided on the engine casing. A first low-pressure oil chamber is provided on a side of the oil pump cover close to the pump mounting cavity, and the oil inlet channel is connected to the first low-pressure oil chamber.

[0008] Furthermore, a first high-pressure oil chamber is provided on a side of the pump installation chamber close to the main oil channel, and the main oil channel is connected to the inner wall of the first high-pressure oil chamber. A second high-pressure oil chamber is provided on a side of the oil pump cover close to the pump installation chamber, and the second high-pressure oil chamber is directly opposite to the first high-pressure oil chamber. The first low-pressure oil chamber and the second high-pressure oil chamber on the oil pump cover are independent of each other.

[0009] Furthermore, the first high-pressure oil chamber and the second high-pressure oil chamber are both waist-shaped with the axis of the second rotor as the center, and the oil suction grooves on the first rotor facing the first high-pressure oil chamber and the second high-pressure oil chamber are separated into independent chambers by the extrusion protrusions on the second rotor.

[0010] Furthermore, the cross-sectional dimensions of the first high-pressure oil chamber and the second high-pressure oil chamber gradually decrease along the rotation direction of the second rotor.

[0011] The beneficial effects of the utility model are as follows: a pump installation cavity is opened in the engine casing, and the first rotor and the second rotor are installed in the pump installation cavity. When the engine is running, the camshaft drives the second rotor to rotate eccentrically in the first rotor. During the rotation of the second rotor, the first rotor is driven to rotate in the pump installation cavity, and a plurality of chambers for passing and storing engine oil are formed between the first rotor and the second rotor. The volume of the chamber repeatedly shrinks and expands during the circumferential rotation of the first rotor, so that the engine oil in the oil pan is sucked into the chamber through the oil suction pipe and then pumped out to the main oil channel in the engine casing. The engine oil pump is integrated in the engine casing, which saves the installation space of the oil pump and the installation space of a large number of interfaces, and simplifies the installation space of the structure on the engine side of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the body of an embodiment of the present application.

[0013] Figure 2 This is a schematic diagram of the explosion structure of the body of an embodiment of the present application.

[0014] Figure 3 It is a schematic diagram of the cooperation state of the first rotor and the second rotor according to an embodiment of the present application.

[0015] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the engine casing of an embodiment of the present application.

[0016] Figure 5 This is a schematic structural diagram of the oil pump cover according to an embodiment of the present application.

[0017] Among them, 1. engine housing; 11. main oil channel; 12. pump installation cavity; 13. oil inlet channel; 14. first high-pressure oil chamber; 2. oil suction pipe; 3. first rotor; 31. oil suction groove; 4. second rotor; 41. extrusion protrusion; 5. oil pump cover; 51. first low-pressure oil chamber; 52. second high-pressure oil chamber; 6. intersecting oil channels. DETAILED DESCRIPTION

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] The present application embodiment discloses a body for installing a built-in oil pump, referring to Figure 1 , Figure 2 and Figure 3 , including an engine housing 1, a pump installation cavity 12 is provided near the engine oil pan of the engine housing 1, the pump installation cavity 12 is cylindrical, a main oil passage 11 and an oil inlet flow passage 13 are provided at both ends of the pump installation cavity 12 in the engine housing 1, the main oil passage 11 is connected to the inside of the engine housing 1, and the end of the oil inlet flow passage 13 away from the pump installation cavity 12 is opened on the outer wall of the engine housing 1. The engine housing 1 is connected to an oil suction pipe 2 externally connected to the engine oil pan, and the oil suction pipe 2 is connected to the opening of the oil inlet flow passage 13 on the engine housing 1.

[0020] A first rotor 3 is coaxially rotatably arranged in the pump installation cavity 12, a second installation cavity is coaxially penetrated on the first rotor 3, a second rotor 4 is also rotatably installed in the pump installation cavity 12, the second rotor 4 is located in the second installation cavity, and is eccentrically installed with the first rotor 3. On the first rotor 3, a plurality of oil suction grooves 31 are evenly arranged along the circumference of the first rotor 3 on the inner wall of the second installation cavity, the oil suction grooves 31 penetrate the two ends of the first rotor 3, and on the outer wall of the second rotor 4, a plurality of extrusion protrusions 41 are evenly arranged along the circumference of the second rotor 4, the extrusion protrusions 41 are equal in width to the first rotor 3, and cooperate with the oil suction grooves 31.

[0021] The oil inlet passage 13 and the main oil passage 11 are connected to the two sides of the pump installation chamber 12, and the main oil passage 11 is connected and aligned at the matching position of the second rotor 4 and the first rotor 3, and the oil inlet passage 13 is connected and aligned at the widest gap between the second rotor 4 and the first rotor 3. One end of the second rotor 4 passes through the engine housing 1 and is drivingly connected to the camshaft of the engine. When the engine is started, the second rotor 4 is driven to rotate. During the rotation of the second rotor 4, the extrusion protrusion 41 on the second rotor 4 and the oil suction groove 31 on the first rotor 3 are continuously matched, and under the continuous cooperation of the extrusion protrusion and the oil suction groove 31, the gap between the second rotor 4 and the first rotor 3 is divided into multiple independent chambers, and the volume of the chamber itself repeats the process of shrinking and expanding as the second rotor 4 and the first rotor 3 rotate. In the process of the chamber volume changing from small to large, this part of the chamber is connected to the oil inlet channel 13, and the oil is sucked from the oil suction pipe 2. In the process of the chamber volume changing from large to small, this part of the chamber is connected to the main oil channel 11, and the oil sucked in the chamber is squeezed and pumped into the main oil channel 11. By building the oil pump into the engine housing 1, the structural volume of the engine side can be simplified and the installation space requirement can be reduced.

[0022] Reference Figure 4 and Figure 5Furthermore, a mounting opening penetrating the engine housing 1 is provided on a side of the pump mounting chamber 12 away from the main oil passage 11, and an oil pump cover 5 for closing the mounting opening of the pump mounting chamber 12 is detachably provided on the engine housing 1, and the oil pump cover 5 is fixedly mounted on the engine housing 1 by bolts, and a sealing gasket is provided between the oil pump cover 5 and the engine housing 1 to ensure the sealing of the pump mounting chamber 12. By opening the pump cover, the first rotor 3 and the second rotor 4 can be conveniently disassembled and assembled. A first low-pressure oil chamber 51 is provided on a side of the oil pump cover 5 close to the pump mounting chamber 12, and the oil inlet channel 13 is connected to the first low-pressure oil chamber 51. The oil enters the first low-pressure oil chamber 51 after passing through the oil inlet channel 13, so that the oil can enter the chamber in the gap between the first rotor 3 and the second rotor 4 from one end thereof.

[0023] A first high-pressure oil chamber 14 is provided on one side of the pump installation chamber 12 close to the main oil passage 11, and the main oil passage 11 is connected to the inner wall of the first high-pressure oil chamber 14. Specifically, an intersecting oil passage 6 is also provided in the engine housing 1, and the first high-pressure oil chamber 14 and the main oil passage 11 are connected through the intersecting oil passage 6. A second high-pressure oil chamber 52 is provided on one side of the oil pump cover 5 close to the pump installation chamber 12, and the second high-pressure oil chamber 52 is directly opposite to the first high-pressure oil chamber 14. The first low-pressure oil chamber 51 and the second high-pressure oil chamber 52 on the oil pump cover 5 are independent of each other. Both the first high-pressure oil chamber 14 and the second high-pressure oil chamber 52 are designed to be waist-shaped with the axis of the second rotor 4 as the center, and the oil suction groove 31 on the first rotor 3 directly facing the first high-pressure oil chamber 14 and the second high-pressure oil chamber 52 are separated into independent chambers by the extrusion protrusion 41 on the second rotor 4. By providing the second high-pressure oil chamber 52, a buffering effect can be played in the process of pumping out the oil from the first rotor 3 and the second rotor 4, thereby improving the structural stability of the oil pump cover 5.

[0024] Furthermore, the cross-sectional dimensions of the first high-pressure oil chamber 14 and the second high-pressure oil chamber 52 gradually decrease along the rotation direction of the second rotor 4, thereby improving the oil pumping power.

[0025] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A body for installing a built-in oil pump, comprising an engine housing (1), an oil suction pipe (2) externally connected to an engine oil pan being connected to the engine housing (1), a main oil passage (11) connected to the oil suction pipe (2) being arranged in the engine housing (1), characterized in that: A pump installation cavity (12) is provided in the engine housing (1), a first rotor (3) is rotatably provided in the pump installation cavity (12), a second installation cavity is coaxially provided on the first rotor (3), a second rotor (4) is rotatably provided in the pump installation cavity (12), the second rotor (4) is eccentrically provided in the second installation cavity, a plurality of oil suction grooves (31) are uniformly provided on the inner wall of the second installation cavity along the circumference of the first rotor (3), an extrusion protrusion (41) adapted to the oil suction groove (31) is provided on the outer wall of the second rotor (4) along the circumference of the second rotor (4), and the extrusion protrusion (41) on the second rotor (4) cooperates with the oil suction groove (31) on the first rotor (3); One end of the second rotor (4) extends out of the engine housing (1), and an oil inlet passage (13) is provided on the engine housing (1). The oil suction pipe (2) is connected to one end of the oil inlet passage (13). The oil inlet passage (13) and the main oil passage (11) are respectively connected to the two side surfaces of the pump installation cavity (12). The main oil passage (11) is connected and aligned at the matching position of the second rotor (4) and the first rotor (3), and the oil inlet passage (13) is connected and aligned at the widest gap between the second rotor (4) and the first rotor (3).

2. A body for installing a built-in oil pump according to claim 1, characterized in that: A mounting opening penetrating the engine housing (1) is provided on a side of the pump mounting chamber (12) away from the main oil passage (11); an oil pump cover (5) for closing the mounting opening of the pump mounting chamber (12) is detachably provided on the engine housing (1); a first low-pressure oil chamber (51) is provided on a side of the oil pump cover (5) close to the pump mounting chamber (12); and the oil inlet passage (13) is in communication with the first low-pressure oil chamber (51).

3. A body for installing a built-in oil pump according to claim 2, characterized in that: A first high-pressure oil chamber (14) is provided on one side of the pump installation chamber (12) close to the main oil passage (11); the main oil passage (11) is connected to the inner wall of the first high-pressure oil chamber (14); a second high-pressure oil chamber (52) is provided on one side of the oil pump cover (5) close to the pump installation chamber (12); the second high-pressure oil chamber (52) is directly opposite to the first high-pressure oil chamber (14); and the first low-pressure oil chamber (51) and the second high-pressure oil chamber (52) on the oil pump cover (5) are independent of each other.

4. A body for mounting a built-in oil pump according to claim 3, characterized in that: The first high-pressure oil chamber (14) and the second high-pressure oil chamber (52) are both waist-shaped with the axis of the second rotor (4) as the center, and the oil suction grooves (31) on the first rotor (3) directly facing the first high-pressure oil chamber (14) and the second high-pressure oil chamber (52) are both separated into independent chambers by the extrusion protrusions (41) on the second rotor (4).

5. A body for mounting a built-in oil pump according to claim 4, characterized in that: The cross-sectional dimensions of the first high-pressure oil chamber (14) and the second high-pressure oil chamber (52) gradually decrease along the rotation direction of the second rotor (4).

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