Same-cavity oil cooling planetary gear speed reducing motor structure

Abstract

The utility model discloses a same-cavity oil cooling planetary gear speed reducing motor structure which comprises a left end cover, a right end cover, a spoke hub, a motor shaft, a bearing, a motor stator, a motor rotor, a planetary gear speed reducing mechanism, a double-oil-seal structure, an O-shaped ring, an oil-gas separation structure, an oil-proof two-way ventilation valve and a magnetic oil injection bolt. According to the structure, the motor and the planetary gear speed reducing mechanism are integrated in the sealed cavity, and gear lubrication and motor cooling are simultaneously realized by using lubricating oil, so that the power density and the heat dissipation performance of the motor are improved, and the overall structure is simplified. The utility model has the advantages of compact structure, high power density, good heat dissipation performance, good sealing performance, balanced internal and external pressure, convenient maintenance and the like.

Description

A cavity-type oil-cooled planetary gear reducer motor structure Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a structure of a cavity-type oil-cooled planetary gear reducer motor. Background Technology

[0002] Traditional motors typically use air cooling or water cooling for heat dissipation. Air cooling has low heat dissipation efficiency and is difficult to meet the heat dissipation requirements of high power density motors; water cooling has a complex structure, high cost, and is prone to leakage. In addition, traditional motors and reduction gears are usually separate, resulting in a large overall size, which is not conducive to miniaturization applications.

[0003] Planetary gear reducers are widely used in various applications requiring speed reduction due to their small size and high transmission efficiency. However, traditional planetary gear reducers typically require a separate lubrication system, increasing overall complexity.

[0004] Therefore, this application provides a cavity-type oil-cooled planetary gear reducer motor structure to solve the technical problems existing in the background art. Summary of the Invention

[0005] Purpose of the utility model: To overcome the shortcomings of the prior art, and to provide a cavity-type oil-cooled planetary gear reducer motor structure. This structure integrates the motor and the planetary gear reduction mechanism into a sealed cavity, and uses lubricating oil to simultaneously achieve gear lubrication and motor cooling, thereby improving the power density and heat dissipation performance of the motor, and simplifying the overall structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cavity-type oil-cooled planetary gear reducer motor structure includes:

[0008] Left and right end caps: Combined with the spoked hub, they form a sealed cavity;

[0009] Spoke hub: Combined with the left and right end caps, it forms a sealed cavity that serves as the motor output end;

[0010] Motor shaft: Fixed and supports the entire motor structure;

[0011] Bearings: Mounted on the motor shaft, supporting the spoked hub and rotor bracket;

[0012] Motor stator: including stator core and stator coil, fixed on stator bracket, which is fixed inside the cavity of left end cover and right end cover;

[0013] Motor rotor: includes rotor magnetic coil and magnets, fixed on rotor support;

[0014] Planetary gear reduction mechanism: includes sun gear, planet gear, left planetary carrier and internal gear ring. The sun gear is mounted on the rotor carrier and the internal gear ring is fixed on the inner ring of the spoke hub.

[0015] Double oil seal structure: set at the joint between the left and right end covers and the motor shaft, including an inner oil seal and an outer oil seal, to improve the sealing effect of the motor;

[0016] O-rings: These are installed at the joints between the left and right end caps and the spoke hub to improve the motor's sealing performance.

[0017] As a further improvement to the above technical solution:

[0018] The motor structure also includes;

[0019] Oil-gas separation structure: Located on the left end cover, used to separate the oil-gas mixture inside the motor;

[0020] Oil-proof two-way vent valve: connected to the oil-gas separation structure, used to balance the internal and external pressure of the motor;

[0021] Magnetic oil injection bolt: Located on the right end cap, used for injecting lubricating oil;

[0022] One-way clutch: Installed inside the wheel hub to prevent the motor from reversing.

[0023] The oil-gas separation structure includes an oil baffle and a venting channel. The oil baffle is used to prevent lubricating oil from splashing, and the venting channel is used to discharge gas.

[0024] It also includes a clutch positioning key and a stator support positioning key. The clutch positioning key is used to fix the one-way clutch, and the stator support positioning key is used to fix the stator support.

[0025] The lubricating oil is gear lubricating oil, used to lubricate gears and cool the motor stator and rotor.

[0026] The spoked wheel hub is made of aluminum alloy.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] 1. Compact structure and high power density: The motor and planetary gear reduction mechanism are integrated into a sealed cavity, which reduces the overall volume and increases the power density.

[0029] 2. Excellent heat dissipation performance: The lubricating oil is used to simultaneously lubricate the gears and cool the motor, quickly transferring the heat generated by the motor core to the left and right end covers and the spoke hub, significantly reducing the motor temperature and preventing malfunctions such as coil burnout.

[0030] 3. Good sealing performance: The double oil seal structure and O-ring are used to improve the sealing effect of the motor and prevent lubricating oil leakage.

[0031] 4. Internal and external pressure balance: Through the oil-gas separation structure and the oil-proof two-way vent valve, the pure air inside the motor is ensured to be discharged to the outside under high pressure through the vent valve, so as to achieve the internal and external pressure balance of the motor.

[0032] 5. Easy maintenance: Lubricating oil can be easily injected and replaced using a magnetic oiling bolt. Attached Figure Description

[0033] Figure 1 is a schematic cross-sectional view of the overall structure;

[0034] Figure 2 is a three-dimensional view of the overall front structure of the motor;

[0035] Figure 3 shows a three-dimensional view of the back of the motor.

[0036] In the diagram: 1. Oil-proof two-way vent valve; 2. Magnetic oil injection bolt; 3. Spoke hub; 4. Rotor magnetic coil; 5. Magnet; 6. Stator core; 7. Stator coil; 8. Stator bracket; 9. Left end cover; 10. Oil baffle; 11. Bearing; 12. Inner oil seal; 13. Outer oil seal; 14. Motor shaft; 15. Stator bracket positioning key; 16. Rotor bracket; 17. O-ring; 18. Right end cover; 19. Internal gear ring; 20. Planetary gear; 21. Left planetary bracket; 22. Bearing; 23. One-way clutch; 24. Clutch positioning key; 25. Sun gear; 26. Bearing. Detailed Implementation

[0037] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0038] The applicant designed a cavity-type oil-cooled planetary gear 20-wheel reduction motor structure as shown in Figure 1-3, including:

[0039] Left end cap 9 and right end cap 18, spoke hub 3, motor shaft 14, bearings 26, 22 and 11, motor stator, motor rotor, planetary gear 20 reduction mechanism, double oil seal structure, O-ring 17, oil-gas separation structure, oil-proof two-way vent valve 1 and magnetic oil injection bolt 2.

[0040] The left end cover 9 and the right end cover 18, together with the spoked hub 3, form a sealed cavity. The motor shaft 14 is fixedly mounted, supporting the entire motor structure. Bearings 26, 22, and 11 are respectively mounted on the motor shaft 14, supporting the spoked hub 3 and the rotor support 16. The motor stator includes a stator core 6 and stator coils 7, fixed on a stator support 8, which is fixed inside the cavities of the left end cover 9 and the right end cover 18. The motor rotor includes a rotor magnetic coil 4 and magnets 5, fixed on the rotor support 16. The planetary gear 20 reduction mechanism includes a sun gear 25, planetary gears 20, a left planetary support 21, and an internal gear ring 19. The sun gear 25 is mounted on the rotor support 16, and the internal gear ring 19 is fixed on the inner ring of the spoked hub 3. A double oil seal structure is provided at the mating points of the left end cover 9 and the right end cover 18 with the motor shaft 14, including an inner oil seal 12 and an outer oil seal 13, to improve the motor's sealing effect. O-rings 17 are placed at the mating points of the left end cap 9 and the right end cap 18 with the spoke hub 3 to improve the motor's sealing effect.

[0041] An oil-gas separation structure is located on the left end cover 9, including an oil baffle 10 and a venting channel. The oil baffle 10 is used to prevent lubricating oil from splashing, and the venting channel is used to discharge gas. An oil-proof two-way venting valve 1 is connected to the oil-gas separation structure to balance the internal and external pressures of the motor. A magnetic oil injection bolt 2 is located on the right end cover 18 for injecting lubricating oil. A one-way clutch 23 is installed inside the hub to prevent the motor from reversing. A clutch positioning key 24 is used to fix the one-way clutch 23. A stator bracket positioning key 15 is used to fix the stator bracket 8.

[0042] The lubricating oil is gear lubricating oil, used to lubricate the gears and cool the motor stator and rotor. The spoked hub 3 is made of aluminum alloy.

[0043] Working principle: During use, gear lubricating oil is injected into the motor through the magnetic oiling bolt 2 hole on the right end cover 18. The lubricating oil lubricates the gears and cools the motor's stator and rotor. After the motor is powered on, the rotor drives the sun gear 25 mounted on the rotor bracket 16 as the input gear of the planetary reduction structure to rotate. The internal gear ring 19 is fixed on the inner ring of the spoke hub 3 as the output gear, ultimately realizing the rotation of the spoke hub 3.

[0044] This application uses bearings 26, 22, and 11 to mount the motor shaft 14, which is fixed. The motor stator and rotor, along with the planetary gear 20 reduction mechanism, are installed inside the cavities of the hub, left end cover 9, and right end cover 18. After the motor is powered on, the rotor drives the sun gear 25 mounted on the rotor support 16 as the input gear of the planetary reduction mechanism to rotate. The internal gear ring 19 is fixed on the inner ring of the hub as the output gear, ultimately achieving the rotation of the hub. The double oil seal structure of the left end cover 9 and right end cover 18, along with the O-ring 17 at the hub, improves the motor's sealing effect. The oil-gas separation structure on the left end cover 9 ensures that the pure air inside the motor is discharged to the outside under high pressure through the vent valve, achieving pressure balance inside and outside the motor. Gear lubricating oil is injected into the motor through the oil injection thread hole of the right end cover 18. The lubricating oil provides lubrication to the gears and also cools the motor stator and rotor. The lubricating oil quickly transfers the heat generated by the motor core to the left end cover 9, right end cover 18, and hub, significantly reducing the motor temperature, increasing the motor power density, and preventing coil burnout and other malfunctions.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A structure for a cavity-type oil-cooled planetary gear reducer motor, characterized in that, include: Left and right end caps: together with the spoked hub, they form a sealed cavity; Spoked hub: together with the left and right end caps, it forms a sealed cavity, serving as the motor output end; Motor shaft: Fixed and supports the entire motor structure; Bearings: Mounted on the motor shaft, supporting the spoke hub and rotor support; Motor stator: Includes stator core and stator coils, fixed on the stator support, which is fixed inside the cavities of the left and right end covers; Motor rotor: Includes rotor magnetic coil and magnets, fixed on the rotor support; Planetary gear reduction mechanism: Includes sun gear, planetary gears, left planetary support, and internal gear ring. The sun gear is mounted on the rotor support, and the internal gear ring is fixed on the inner ring of the spoke hub; Double oil seal structure: Located at the mating points between the left and right end covers and the motor shaft, including an inner oil seal and an outer oil seal, used to improve the motor's sealing effect; O-rings: Located at the mating points between the left and right end covers and the spoke hub, used to improve the motor's sealing effect.

2. The same-cavity oil-cooled planetary gear reducer motor structure according to claim 1, characterized in that, The motor structure also includes: an oil-gas separation structure: located on the left end cover, used to separate the oil-gas mixture inside the motor; an oil-proof two-way vent valve: connected to the oil-gas separation structure, used to balance the internal and external pressures of the motor; and a magnetic oil injection bolt: located on the right end cover, used to inject lubricating oil. One-way clutch: Installed inside the wheel hub to prevent the motor from reversing.

3. The same-cavity oil-cooled planetary gear reducer motor structure according to claim 2, characterized in that, The oil-gas separation structure includes an oil baffle and a venting channel. The oil baffle is used to prevent lubricating oil from splashing, and the venting channel is used to discharge gas.

4. The same-cavity oil-cooled planetary gear reducer motor structure according to claim 1, characterized in that, It also includes a clutch positioning key and a stator support positioning key. The clutch positioning key is used to fix the one-way clutch, and the stator support positioning key is used to fix the stator support.

5. The same-cavity oil-cooled planetary gear reducer motor structure according to claim 3, characterized in that, The lubricating oil is gear lubricating oil, used to lubricate gears and cool the motor stator and rotor.

6. The same-cavity oil-cooled planetary gear reducer motor structure according to claim 1, characterized in that, The spoked wheel hub is made of aluminum alloy.

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