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

Abstract

The utility model provides a high-speed oil-cooled 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 structure is high in integration degree, light and flexible in structure, convenient to assemble and arrange and suitable for the requirement for light-weight 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] This utility model belongs to the field of automotive motor technology, and in particular relates to a high-speed oil-cooled motor with a five-segment housing structure. Background Technology

[0002] With increasingly stringent environmental requirements for automobiles, the number of new energy vehicles is gradually increasing. Among new energy range-extended models, high-speed oil-cooled motors are widely used. Currently, the structure of high-speed oil-cooled motors is designed in a vehicle-specific manner, resulting in high motor structural specialization. When iterating the system, adaptation design is required, 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. Utility Model Content

[0003] To address the problems existing in the background technology, this utility model provides a high-speed oil-cooled motor with a five-segment housing structure. This 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 this utility model to solve its technical problem is: a high-speed oil-cooled motor with a five-section housing structure, including a front housing, a planetary gear set, 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. The middle housing is provided with a front cavity and a rear cavity connected by a shaft hole. The planetary gear set is coaxially fixedly mounted on the input shaft and rotatably inserted into 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 and the rotor are inserted into the rear cavity. The front end of the motor shaft is connected to the input shaft. The input shaft is coaxially fixedly connected. The end cover is fixedly encapsulated on the front port of the front cavity and encapsulates the planetary gear set in the front cavity. The front housing is fixedly installed on the front side of the middle housing. The input end of the input shaft passes through the end cover and is placed in the front housing. The rear housing has a shaft hole. The rear housing is fixedly encapsulated on the rear port of the rear cavity. The rear end of the motor shaft is inserted into the shaft hole of the rear housing. The pump housing is fixedly installed on the rear housing and seals the shaft hole of the rear housing. The oil pipe is fixedly installed in the rear cavity and located between the stator and the middle housing. The oil pipe has a pressure injection hole.

[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 installed on the input shaft and located in the radial gap where the input shaft mates with the end cover. The oil seal is fixedly fitted on the input shaft and seals the gap between the front end of the end cover and the input shaft. Bearing two is fixedly fitted on the motor shaft and located in the radial gap where the motor shaft mates with the middle housing. Bearing three is fixedly fitted on the motor shaft and located in the radial gap where the motor shaft mates with the rear housing. The sealing ring is gasketed between the end faces where the pump housing and the rear housing abut.

[0006] The rear cavity wall is provided with multiple oil limiting grooves with smooth arc-shaped grooves, and multiple branch pipes are provided on the oil pipe at the positions of the multiple oil limiting grooves. The multiple branch pipes are located in the multiple oil limiting grooves, and the pressure injection hole is opened on the branch pipe.

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

[0008] The rear cavity wall of the shaft hole of the middle shell is provided with an oil inlet groove 1, an oil outlet groove and an oil inlet groove 2. Oil flows into the bearing 2 from the oil inlet groove 1 and the oil outlet groove 2, and flows out of the bearing 2 from the oil outlet groove.

[0009] Flange 1 and Flange 2 are staggered at the port of the front cavity of the middle shell. The end cover is fixedly connected to Flange 2 by multiple bolts 2. Flange 1 protrudes from the end face of Flange 2 and surrounds the outside of Flange 2. The front shell is fixedly connected to Flange 1 by bolt 1.

[0010] The motor shaft has an oil passage one along the axis in the middle, and the input shaft has an oil passage two along the axis. The oil passage one and the oil passage two are sealed and connected. Multiple radial oil passages are opened on the input shaft, and the radial oil passages connect the oil passage two and the front cavity. A gear pump is fixedly installed at the tail end of the motor shaft away from the input shaft, and the oil outlet of the gear pump is sealed and connected to the oil passage one.

[0011] The beneficial effects of this utility model are as follows: The motor has a high degree of overall structural integration, is lightweight and flexible, and is easy to assemble and arrange, adapting to lightweight layout requirements; the front end of the motor is connected to a replaceable front housing via a flange structure, improving the motor's adaptability and enabling it to meet the layout needs of various vehicle drive systems, thus having high applicability; the motor housing integrates oil pipes and is equipped with an oil limiting groove, improving the utilization rate of cooling oil and ensuring cooling efficiency; an oil level hole is provided between the two chambers of the motor housing to ensure the churning efficiency of the planetary gear set and avoid kinetic energy loss; an air pressure hole is provided between the two chambers of the motor housing to ensure pressure balance between the two chambers, preventing oil backflow, improving safety, and making the motor operation more stable; the motor has an oil inlet groove and an oil outlet groove at the bearing structure to ensure the lubrication efficiency of the bearing. Attached Figure Description

[0012] In the attached diagram:

[0013] Figure 1 This is a cross-sectional view of the internal structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the oil pipe layout of this utility model;

[0015] Figure 3 This is a schematic diagram of the upper flange structure of the middle shell of this utility model;

[0016] In the diagram: 1. Front housing; 2. Bolt 1; 3. Bearing 1; 4. Planetary gear set; 5. Bearing 2; 6. Rotor; 7. Stator; 8. Middle housing; 9. Rear housing; 10. Oil pipe; 11. Motor shaft; 12. Pressure injection port; 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 passage 1; 30. Shaft oil passage 2. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] A high-speed oil-cooled motor with a five-section housing structure includes a front housing 1, a planetary gear set 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 has a front cavity and a rear cavity connected by a shaft hole. The planetary gear set 4 is coaxially fixedly mounted on the input shaft 13 and rotatably inserted into 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, and the motor shaft 11, together with the rotor 6, is inserted into 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 encapsulated in the front housing. The cavity is located on the front port and the planetary gear 4 is encapsulated in the front cavity. The front housing 1 is fixedly installed 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. The rear housing 9 has a shaft hole and is fixedly encapsulated on the rear port of the rear cavity. The rear end of the motor shaft 11 is inserted into the shaft hole of the rear housing 9. The pump housing 20 is fixedly installed on the rear housing 9 and seals the shaft hole of the rear housing 9. The oil pipe 10 is fixedly installed in the rear cavity and is located between the stator 7 and the middle housing 8. The oil inlet side of the oil pipe 10 extends out to the outside of the middle housing 8 and is connected to the oil supply equipment. The oil outlet side of the oil pipe 10 has a pressure injection hole 12.

[0019] The high-speed oil-cooled motor with a five-section housing structure also includes bearing 3, bearing 5, oil seal 14, bearing 18, and sealing ring 19. Bearing 3 is fixedly installed on the input shaft 13 and located in the radial gap between the input shaft 13 and the end cover 15. Oil seal 14 is fixedly fitted on the input shaft 13 and seals the gap between the front end of the end cover 15 and the input shaft 13, thereby achieving front-end sealing. Bearing 5 is fixedly fitted on the motor shaft 11 and located in the radial gap between the motor shaft 11 and the middle housing 8. Bearing 18 is fixedly fitted on the motor shaft 11 and located in the radial gap between the motor shaft 11 and the rear housing 9. Sealing ring 19 is installed between the end faces of the pump housing 20 and the rear housing 9 to achieve sealed assembly between the pump housing 20 and the rear housing 9. The arrangement of bearings 3, 5, and 18 ensures stable and smooth rotation of the input shaft 13 and the motor shaft 11.

[0020] Multiple oil-limiting grooves 21 with smooth, arc-shaped walls are provided on the cavity wall of the rear cavity. Multiple branch pipes are provided on the oil pipe 10 at the positions of the multiple oil-limiting grooves 21. The multiple branch pipes are located in the multiple oil-limiting grooves 21. The pressure oil injection hole 12 is opened on the branch pipe. Cooling oil flows through the oil pipe 10 and is injected into the rear cavity from the pressure oil injection hole 12. The cooling oil is sprayed onto the stator 7 to cool it down. Part of the cooling oil sprayed from the pressure oil injection hole 12 is directly sprayed onto the stator 7, and part of it is reflected onto the stator 7 after passing 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 hole 12 can act on the stator 7, reducing cooling loss.

[0021] An oil level hole 17 is provided through the cavity wall shared by the front and rear chambers. Depending on the installation posture of the motor, the oil level hole 17 is located below the input shaft 13. The excess oil in the front chamber flows back to the rear chamber through the oil level hole 17. The oil level hole 17 is provided to prevent excessive oil in the front chamber, thereby ensuring the oil stirring efficiency of the planetary gear 4 and avoiding kinetic energy loss. An air pressure hole 22 is provided through the cavity wall shared by the front and rear chambers to maintain the pressure balance of the chambers. Depending on the installation posture of the motor, the air pressure hole 22 is located below the input shaft 13. The air pressure hole 22 is provided to ensure the pressure balance between the front and rear chambers and prevent the backflow of oil.

[0022] The rear cavity wall of the shaft hole of the middle shell 8 is provided with an oil inlet groove 23, an oil outlet groove 24 and an oil inlet groove 25. Oil flows into the bearing 25 from the oil inlet groove 23 and the oil outlet groove 25, and flows out of the bearing 25 from the oil outlet groove 24. The oil inlet groove 23, the oil outlet groove 24 and the oil inlet groove 25 ensure that the oil continuously and stably provides lubrication to the bearing 25, thereby maintaining the high-speed smooth rotation of the motor shaft 11.

[0023] Flange 1 26 and Flange 27 are staggered at the port of the front cavity of the middle shell 8. The end cover 15 is fixedly connected to the flange 27 by multiple bolts 2 16. The flange 1 26 protrudes from the end face of the flange 27 and surrounds the outside of the flange 27. The front shell 1 is fixedly connected to the 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 to the flange 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 damage the overall structure of the motor or affect the sealing performance of the overall structure of the motor. The set of a matchable and replaceable front shell 1 improves the adaptability of the motor to different power systems.

[0024] The motor shaft 11 has an oil passage 29 along its axis in the middle, and the input shaft 13 has an oil passage 30 along its axis. The oil passage 29 and the oil passage 30 are sealed and connected. Multiple radial oil passages are opened on the input shaft 13, which connect the oil passage 30 and the front cavity. A gear pump 28 is fixedly installed 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 to the oil passage 29. When the gear pump 28 operates, it pumps lubricating oil through the oil passage 29, the oil passage 30 and the radial oil passages to the front cavity to provide lubrication for the planetary gear set 4. When the level of the oil in the front cavity that provides lubrication for the planetary gear set 4 reaches the oil level hole 17, and there is excess oil in the front cavity, the excess oil will flow naturally into the rear cavity from the oil level hole 17.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high speed oil cooled electric machine of five segment housing construction characterized by: The high-speed oil-cooled motor comprises a front shell (1), a planetary gear set (4), a rotor (6), a stator (7), a middle shell (8), a rear shell (9), an oil pipe (10), a motor shaft (11), an input shaft (13), an end cover (15) and a pump shell (20), the middle shell (8) is provided with a front cavity and a rear cavity communicated through a shaft hole, the planetary gear set (4) is coaxially fixedly installed on the input shaft (13) and rotatably inserted into the front cavity, the stator (7) is fixedly installed in the rear cavity, the rotor (6) is coaxially fixedly installed on the motor shaft (11), the motor shaft (11) is inserted into the rear cavity together with the rotor (6), the front end of the motor shaft (11) is coaxially fixedly connected with the input shaft (13), the end cover (15) is fixedly encapsulated on the port on the front side of the front cavity and encapsulates the planetary gear set (4) 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) passes through the end cover (15) and is arranged in the front shell (1), the rear shell (9) is provided with a shaft hole, the rear shell (9) is fixedly encapsulated on the port on the rear side of the rear cavity, the rear end of the motor shaft (11) is inserted into the shaft hole of the rear shell (9), the pump shell (20) is fixedly installed on the rear shell (9) and seals the shaft hole of the rear shell (9), the oil pipe (10) is fixedly installed in the rear cavity and located between the stator (7) and the middle shell (8), the oil inlet side of the oil pipe (10) is connected with external oil supply equipment, and the oil outlet side of the oil pipe (10) is provided with a pressure oil injection hole (12).

2. A five-segment housing structure high speed oil-cooled electric machine according to claim 1, characterized in that: The high-speed oil-cooled motor further comprises a bearing one (3), a bearing two (5), an oil seal (14), a bearing three (18) and a sealing ring (19), the bearing one (3) is fixedly installed on the input shaft (13) and located in the radial clamping seam between the input shaft (13) and the end cover (15), the oil seal (14) is fixedly sleeved on the input shaft (13) and seals the gap between the front end of the end cover (15) and the input shaft (13), the bearing two (5) is fixedly sleeved on the motor shaft (11) and located in the radial clamping seam between the motor shaft (11) and the middle shell (8), the bearing three (18) is fixedly sleeved on the motor shaft (11) and located in the radial clamping seam between the motor shaft (11) and the rear shell (9), and the sealing ring (19) is arranged between the end faces of the pump shell (20) and the rear shell (9) abutting each other.

3. A five-segment housing structure high speed oil-cooled electric machine according to claim 1 or 2, characterized in that: A plurality of oil limiting grooves (21) with smooth circular 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) at positions matched with the plurality of oil limiting grooves (21), and the plurality of branch pipes are located in the plurality of oil limiting grooves (21), and the pressure oil injection hole (12) is arranged on the branch pipe.

4. A five-segment housing structure high speed oil-cooled electric machine according to claim 3, characterized in that: An oil level hole (17) is arranged 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 through the oil level hole (17), and an air pressure hole (22) for keeping the pressure balance of the cavity is arranged on the cavity wall shared by the front cavity and the rear cavity.

5. A five-segment housing structure high speed oil-cooled electric machine according to claim 4, characterized in that: The rear cavity side cavity wall of the shaft hole of the middle shell (8) is provided with an oil inlet groove one (23), an oil discharge groove (24) and an oil inlet groove two (25), oil flows into the bearing two (5) from the oil inlet groove one (23) and the oil inlet groove two (25), and oil flows out of the bearing two (5) from the oil discharge groove (24).

6. A five-segment housing structure high speed oil-cooled electric machine according to claim 5, characterized in that: The flange one (26) and the flange two (27) are arranged staggeredly on the port of the front cavity of the middle shell (8), the end cover (15) is fixedly connected and installed on the flange two (27) through a plurality of bolts two (16), the flange one (26) protrudes from the end surface of the flange two (27) and surrounds the outside of the flange two (27), and the front shell (1) is fixedly connected and installed on the flange one (26) through the bolt one (2).

7. A five-segment housing structure high speed oil-cooled electric machine according to claim 6, characterized in that: The middle part of the motor shaft (11) is provided with a shaft oil path one (29) along the axis, the input shaft (13) is provided with a shaft oil path two (30) along the axis, the shaft oil path one (29) and the shaft oil path two (30) are in sealed communication, a plurality of radial oil paths are arranged on the input shaft (13) along the radial direction, the radial oil paths are in communication with the shaft oil path two (30) and the front cavity, and the tail end of the motor shaft (11) away from the input shaft (13) is fixedly arranged with a gear pump (28), and the oil outlet hole of the gear pump (28) is in sealed communication with the shaft oil path one (29).

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