High-speed oil-cooled motor with five-section shell structure

Abstract

The invention provides a high-speed oil cooling motor with a five-section shell structure, and belongs to the technical field of automobile motors. The motor is high in structure integration degree, convenient to assemble, high in oil cooling efficiency and stable in operation. A stator of the motor is mounted in a rear cavity of a middle shell, a rotor is mounted on a motor shaft and rotatably mounted in the rear cavity, a planet row is mounted on an input shaft and rotatably mounted in a front cavity of the middle shell, the input shaft is axially and fixedly connected with the motor shaft, an end cover is fixedly packaged on a port of the front cavity, a rear shell is packaged on a port of the rear cavity, and a front shell is fixedly mounted on the front side of the middle shell. The pump shell is fixedly packaged on a shaft hole of the rear shell, and an oil pipe is arranged in a rear cavity of the middle shell for oil filling. The motor is high in overall structure integration degree, light and flexible in structure, convenient to assemble and arrange and adaptive to the requirement for lightweight arrangement, the front shell of the motor can be adaptively replaced, the design requirements of various vehicle type systems can be met, an oil pipe is arranged in the motor, the cooling oil supply effect is good, the cooling and lubricating effects are good, and the motor runs stably and is high in safety.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile motors, and in particular relates to a high-speed oil-cooled motor with a five-section housing structure. Background Art

[0002] With the continuous improvement of environmental protection requirements for automobiles, new energy vehicles are gradually increasing. In new energy extended-range vehicles, high-speed oil-cooled motors are more commonly used. The current structure of high-speed oil-cooled motors is designed in the form of one vehicle and one model. The motor structure is highly specialized. When iterating the system, it is necessary to redesign the adaptability, which is not conducive to widespread application. Therefore, a new type of motor is needed to meet the design and development needs of new energy vehicles. Summary of the invention

[0003] In order to solve the problems existing in the above-mentioned background technology, the present invention provides a high-speed oil-cooled motor with a five-section housing structure. The motor has a high degree of structural integration, is easy to assemble, has high oil cooling efficiency, and operates stably.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a high-speed oil-cooled motor with a five-section housing structure, including a front housing, a planetary row, a rotor, a stator, a middle housing, a rear housing, an oil pipe, a motor shaft, an input shaft, an end cover and a pump housing, wherein the middle housing is provided with a front cavity and a rear cavity connected by an axial hole, the planetary row is coaxially fixedly mounted on the input shaft and rotatably inserted in the front cavity, the stator is fixedly mounted in the rear cavity, the rotor is coaxially fixedly mounted on the motor shaft, the motor shaft cooperates with the rotor to be inserted in the rear cavity, and the front end of the motor shaft is connected to the input shaft. The shafts are coaxially fixedly connected, the end cover is fixedly packaged on the port of the front cavity on the front side and the planetary gear is packaged in the front cavity, the front shell is fixedly installed on the front side of the middle shell, the input end of the input shaft passes through the end cover and is placed in the front shell, an axial hole is opened on the rear shell, the rear shell is fixedly packaged on the port of the rear cavity on the rear side, the rear end of the motor shaft is inserted in the axial hole of the rear shell, the pump shell is fixedly installed on the rear shell and blocked on the axial hole of the rear shell, the oil pipe is fixedly installed in the rear cavity and is located between the stator and the middle shell, and a pressure oil injection hole is opened on the oil pipe.

[0005] The high-speed oil-cooled motor with a five-section housing structure also includes bearing one, bearing two, an oil seal, bearing three and a sealing ring. Bearing one is fixedly mounted on the input shaft and is located in a radial gap between the input shaft and the end cover. The oil seal is fixedly mounted on the input shaft and seals in a gap between the front end of the end cover and the input shaft. Bearing two is fixedly mounted on the motor shaft and is located in a radial gap between the motor shaft and the middle shell. Bearing three is fixedly mounted on the motor shaft and is located in a radial gap between the motor shaft and the rear shell. The sealing ring is installed between the end faces of the pump shell and the rear shell.

[0006] A plurality of oil limiting grooves with smooth arc-shaped groove walls are arranged on the cavity wall of the rear cavity, a plurality of branch pipes are arranged on the oil pipe to match the positions of the plurality of oil limiting grooves, the plurality of branch pipes are located in the plurality of oil limiting grooves, and the pressure oil injection holes are opened on the branch pipes.

[0007] An oil level hole is provided on the cavity wall shared by the front cavity and the rear cavity, and the remaining oil in the front cavity naturally flows back to the rear cavity from the oil level hole. An air pressure hole is provided on the cavity wall shared by the front cavity and the rear cavity to maintain the pressure balance of the cavity.

[0008] An oil inlet groove 1, an oil drain groove and an oil inlet groove 2 are arranged on the cavity wall of one side of the rear cavity of the shaft hole of the middle shell. The oil flows into the second bearing from the oil inlet groove 1 and the second oil inlet groove, and the oil flows out of the second bearing from the oil drain groove.

[0009] Flange plate 1 and flange plate 2 are staggeredly arranged on the port of the front cavity of the middle shell, the end cover is fixedly connected and installed on flange plate 2 by multiple bolts 2, the flange plate 1 protrudes from the end surface of flange plate 2 and surrounds the outer side of flange plate 2, and the front shell is fixedly connected and installed on flange plate 1 by bolts 1.

[0010] An axial oil circuit 1 is opened in the middle of the motor shaft along the axis, an axial oil circuit 2 is opened in the input shaft along the axis, the axial oil circuit 1 is sealed and connected with the axial oil circuit 2, a plurality of radial oil circuits are opened in the radial direction on the input shaft, the radial oil circuits connect the axial oil circuit 2 with the front cavity, a gear pump is fixedly arranged at the rear end of the motor shaft away from the input shaft, and the oil outlet hole of the gear pump is sealed and connected with the axial oil circuit 1.

[0011] The beneficial effects of the present invention are as follows: the motor has a high degree of structural integration, a light and flexible structure, is easy to assemble and arrange, and is adapted to the requirements of lightweight arrangement; a replaceable front shell is installed at the front end of the motor via a flange structure, thereby improving the adaptability of the motor, and being adaptable to the arrangement requirements of various vehicle drive systems, and having a high degree of application; an oil pipe is integrated in the motor shell, and an oil limiting groove is provided in cooperation with the oil pipe, thereby improving the utilization rate of the cooling oil and ensuring the cooling efficiency; an oil level hole is provided between the two chambers of the motor middle shell, thereby ensuring the oil stirring efficiency of the planetary gear and avoiding the loss of kinetic energy; an air pressure hole is provided between the two chambers of the motor middle shell, thereby ensuring the pressure balance between the two chambers and avoiding oil back suction, thereby improving the safety and making the motor run more stably; an oil inlet groove and an oil outlet groove are provided at the bearing structure of the motor, thereby ensuring the lubrication efficiency of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In the attached picture:

[0013] Figure 1 It is a cross-sectional view of the internal structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the oil pipeline layout of the present invention;

[0015] Figure 3 This is a schematic diagram of the flange structure on the shell of the present invention;

[0016] In the figure: 1. front housing; 2. bolt 1; 3. bearing 1; 4. planetary gear; 5. bearing 2; 6. rotor; 7. stator; 8. middle housing; 9. rear housing; 10. oil pipe; 11. motor shaft; 12. pressure oil injection hole; 13. input shaft; 14. oil seal; 15. end cover; 16. bolt 2; 17. oil level hole; 18. bearing 3; 19. sealing ring; 20. pump housing; 21. oil limiting groove; 22. air pressure hole; 23. oil inlet groove 1; 24. oil drain groove; 25. oil inlet groove 2; 26. flange 1; 27. flange 2; 28. gear pump; 29. ​​shaft oil circuit 1; 30. shaft oil circuit 2. DETAILED DESCRIPTION

[0017] The present invention is now described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0018] A high-speed oil-cooled motor with a five-section housing structure, comprising a front housing 1, a planetary row 4, a rotor 6, a stator 7, a middle housing 8, a rear housing 9, an oil pipe 10, a motor shaft 11, an input shaft 13, an end cover 15 and a pump housing 20, wherein the middle housing 8 is provided with a front cavity and a rear cavity connected by an axial hole, the planetary row 4 is coaxially fixedly mounted on the input shaft 13 and rotatably inserted in the front cavity, the stator 7 is fixedly mounted in the rear cavity, the rotor 6 is coaxially fixedly mounted on the motor shaft 11, the motor shaft 11 cooperates with the rotor 6 to be inserted in the rear cavity, the front end of the motor shaft 11 is coaxially fixedly connected to the input shaft 13, and the end cover 15 is fixedly packaged in the front cavity. The cavity is located on the port on the front side and the planetary gear 4 is encapsulated in the front cavity. The front shell 1 is fixedly installed on the front side of the middle shell 8. The input end of the input shaft 13 is placed in the front shell 1 through the end cover 15. The rear shell 9 is provided with an axial hole. The rear shell 9 is fixedly encapsulated on the port of the rear cavity located on the rear side. The rear end of the motor shaft 11 is inserted in the axial hole of the rear shell 9. The pump shell 20 is fixedly installed on the rear shell 9 and sealed on the axial hole of the rear shell 9. The oil pipe 10 is fixedly installed in the rear cavity and is located between the stator 7 and the middle shell 8. The oil inlet side of the oil pipe 10 passes through the outside of the middle shell 8 and is connected with the oil supply equipment. The oil outlet side of the oil pipe 10 is provided with a pressure oil injection hole 12.

[0019] The high-speed oil-cooled motor with the five-section housing structure also includes bearing 1 3, bearing 2 5, oil seal 14, bearing 3 18 and sealing ring 19. The bearing 1 3 is fixedly mounted on the input shaft 13 and is located in the radial gap between the input shaft 13 and the end cover 15. The oil seal 14 is fixedly sleeved on the input shaft 13 and seals in the gap between the front end of the end cover 15 and the input shaft 13, thereby realizing front end sealing. The bearing 2 5 is fixedly sleeved on the motor shaft 11 and is located in the radial gap between the motor shaft 11 and the middle shell 8. The bearing 3 18 is fixedly sleeved on the motor shaft 11 and is located in the radial gap between the motor shaft 11 and the rear shell 9. The sealing ring 19 is cushioned between the end faces of the pump shell 20 and the rear shell 9 that are in contact with each other to realize the sealing assembly between the pump shell 20 and the rear shell 9. The arrangement of the bearing 1 3, bearing 2 5 and bearing 3 18 ensures the stable and smooth rotation of the input shaft 13 and the motor shaft 11.

[0020] A plurality of oil limiting grooves 21 with smooth arc-shaped groove walls are arranged on the cavity wall of the rear cavity, a plurality of branch pipes are arranged on the oil pipe 10 to match the positions of the plurality of oil limiting grooves 21, and the plurality of branch pipes are located in the plurality of oil limiting grooves 21. The pressure oil injection holes 12 are opened on the branch pipes, and the cooling oil flows through the oil pipe 10 and is sprayed into the rear cavity from the pressure oil injection holes 12. The cooling oil is sprayed on the stator 7 to cool it. Part of the cooling oil sprayed from the pressure oil injection holes 12 is directly sprayed on the stator 7, and part of the cooling oil is reflected on the stator 7 through the groove wall of the oil limiting groove 21. The setting of the oil limiting groove 21 ensures that the cooling oil sprayed from the pressure oil injection holes 12 can act on the stator 7, thereby reducing the cooling loss.

[0021] A through oil level hole 17 is arranged on the cavity wall shared by the front cavity and the rear cavity. According to the installation posture of the motor, the oil level hole 17 is located below the input shaft 13. The remaining oil in the front cavity naturally flows back to the rear cavity from the oil level hole 17. The setting of the oil level hole 17 avoids excessive oil in the front cavity, thereby ensuring the oil stirring efficiency of the planetary gear 4 and avoiding kinetic energy loss. A through air pressure hole 22 for maintaining the pressure balance of the cavity is arranged on the cavity wall shared by the front cavity and the rear cavity. According to the installation posture of the motor, the air pressure hole 22 is located below the input shaft 13. The setting of the air pressure hole 22 ensures the pressure balance between the front cavity and the rear cavity and avoids the occurrence of oil back suction.

[0022] An oil inlet groove 1 23, an oil drain groove 24 and an oil inlet groove 25 are arranged on the cavity wall on one side of the rear cavity of the axial hole of the middle shell 8. The oil flows into the bearing 2 5 from the oil inlet groove 1 23 and the oil drain groove 25, and the oil flows out of the bearing 2 5 from the oil drain groove 24. The arrangement of the oil inlet groove 1 23, the oil drain groove 24 and the oil inlet groove 25 ensures that the oil continuously and stably provides lubrication for the bearing 2 5, thereby maintaining the high-speed and smooth rotation of the motor shaft 11.

[0023] Flange 1 26 and flange 27 are staggeredly arranged on the port of the front cavity of the middle shell 8, and the end cover 15 is fixedly connected and installed on flange 27 by multiple bolts 16. The flange 1 26 protrudes from the end surface of flange 27 and surrounds the outer side of flange 27. The front shell 1 is fixedly connected and installed on flange 1 26 by bolts 1 2. The front shell 1 and the end cover 15 are two independent components. The end cover 15 is used to encapsulate the input shaft 13, and the front shell 1 is used to connect with external components. The front shell 1 is connected and installed on flange 1 26. The front shell 1 can be adapted and replaced according to the structural requirements of different power systems. Replacing the front shell 1 does not destroy the overall structure of the motor and does not affect the sealing of the overall structure of the motor. The provision of a matchable and replaceable front shell 1 improves the adaptability of the motor in different power systems.

[0024] An axial oil circuit 29 is provided in the middle of the motor shaft 11 along the axis, an axial oil circuit 2 30 is provided in the input shaft 13 along the axis, the axial oil circuit 1 29 is sealed and connected with the axial oil circuit 2 30, a plurality of radial oil circuits are provided radially on the input shaft 13, the radial oil circuits connect the axial oil circuit 2 30 with the front cavity, a gear pump 28 is fixedly arranged at the tail end of the motor shaft 11 away from the input shaft 13, the oil outlet of the gear pump 28 is sealed and connected with the axial oil circuit 1 29, the gear pump 28 operates to pump the lubricating oil to the front cavity through the axial oil circuit 1 29, the axial oil circuit 2 30 and the radial oil circuits, so as to provide lubrication for the planetary gear 4, when the liquid level of the oil in the front cavity that provides lubrication for the planetary gear 4 reaches the position of the oil level hole 17, and the oil in the front cavity is excessive, the excess oil will naturally flow from the oil level hole 17 into the rear cavity.

[0025] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-speed oil-cooled motor with a five-section housing structure, characterized in that: The invention comprises a front housing (1), a planetary gear (4), a rotor (6), a stator (7), a middle housing (8), a rear housing (9), an oil pipe (10), a motor shaft (11), an input shaft (13), an end cover (15) and a pump housing (20). The middle housing (8) is provided with a front cavity and a rear cavity which are connected through an axial hole. The planetary gear (4) is coaxially fixedly mounted on the input shaft (13) and is rotatably inserted in the front cavity. The stator (7) is fixedly mounted in the rear cavity. The rotor (6) is coaxially fixedly mounted on the motor shaft (11). The motor shaft (11) cooperates with the rotor (6) to be inserted in the rear cavity. The front end of the motor shaft (11) is coaxially fixedly connected to the input shaft (13). The end cover (15) is fixedly packaged in the front cavity. The front housing (1) is fixedly mounted on the front side of the middle housing (8); the input end of the input shaft (13) passes through the end cover (15) and is placed in the front housing (1); an axial hole is provided on the rear housing (9); the rear housing (9) is fixedly packaged on the port on the rear side of the rear housing; the rear end of the motor shaft (11) is inserted into the axial hole of the rear housing (9); the pump housing (20) is fixedly mounted on the rear housing (9) and blocked on the axial hole of the rear housing (9); the oil pipe (10) is fixedly mounted in the rear housing and is located between the stator (7) and the middle housing (8); the oil inlet side of the oil pipe (10) is connected to an external oil supply device; and the oil outlet side of the oil pipe (10) is provided with a pressure oil injection hole (12).

2. A high-speed oil-cooled motor with a five-section housing structure according to claim 1, characterized in that: The high-speed oil-cooled motor with a five-section housing structure further comprises a bearing 1 (3), a bearing 2 (5), an oil seal (14), a bearing 3 (18) and a sealing ring (19). The bearing 1 (3) is fixedly mounted on the input shaft (13) and is located in a radial gap between the input shaft (13) and the end cover (15). The oil seal (14) is fixedly sleeved on the input shaft (13) and is sealed in a gap between the front end of the end cover (15) and the input shaft (13). The bearing 2 (5) is fixedly sleeved on the motor shaft (11) and is located in a radial gap between the motor shaft (11) and the middle housing (8). The bearing 3 (18) is fixedly sleeved on the motor shaft (11) and is located in a radial gap between the motor shaft (11) and the rear housing (9). The sealing ring (19) is cushioned between the end faces of the pump housing (20) and the rear housing (9) that abut against each other.

3. A high-speed oil-cooled motor with a five-section housing structure according to claim 1 or 2, characterized in that: A plurality of oil limiting grooves (21) having smooth arc-shaped groove walls are arranged on the cavity wall of the rear cavity, a plurality of branch pipes are arranged on the oil pipe (10) to match the positions of the plurality of oil limiting grooves (21), the plurality of branch pipes are located in the plurality of oil limiting grooves (21), and the pressure oil injection holes (12) are opened on the branch pipes.

4. A high-speed oil-cooled motor with a five-section housing structure according to claim 3, characterized in that: A through oil level hole (17) is provided on the cavity wall shared by the front cavity and the rear cavity, and the remaining oil in the front cavity naturally flows back from the oil level hole (17) to the rear cavity. A through air pressure hole (22) for maintaining cavity pressure balance is provided on the cavity wall shared by the front cavity and the rear cavity.

5. A high-speed oil-cooled motor with a five-section housing structure according to claim 4, characterized in that: An oil inlet groove (23), an oil outlet groove (24) and an oil inlet groove (25) are arranged on a cavity wall on one side of the rear cavity of the shaft hole of the middle shell (8); oil flows into the second bearing (5) from the first oil inlet groove (23) and the second oil inlet groove (25), and the oil flows out of the second bearing (5) from the oil outlet groove (24).

6. A high-speed oil-cooled motor with a five-section housing structure according to claim 5, characterized in that: A flange plate 1 (26) and a flange plate 2 (27) are staggeredly arranged on the port of the front cavity of the middle shell (8); the end cover (15) is fixedly connected and mounted on the flange plate 2 (27) by means of a plurality of bolts 2 (16); the flange plate 1 (26) protrudes from the end surface of the flange plate 2 (27) and surrounds the outer side of the flange plate 2 (27); the front shell (1) is fixedly connected and mounted on the flange plate 1 (26) by means of bolts 1 (2).

7. A high-speed oil-cooled motor with a five-section housing structure according to claim 6, characterized in that: A shaft oil circuit (29) is provided in the middle of the motor shaft (11) along the axis, a shaft oil circuit (30) is provided in the middle of the input shaft (13) along the axis, the shaft oil circuit (29) is sealed and connected to the shaft oil circuit (30), a plurality of radial oil circuits are provided in the radial direction on the input shaft (13), the radial oil circuits connect the shaft oil circuit (30) and the front cavity, a gear pump (28) is fixedly arranged at the rear end of the motor shaft (11) away from the input shaft (13), and the oil outlet hole of the gear pump (28) is sealed and connected to the shaft oil circuit (29).

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