Oil cooling exhaust structure of hub motor
By designing a labyrinth flow channel and exhaust structure in the hub motor, the problem of gas discharge in oil-cooled hub motors is solved, achieving a balance of internal and external pressures and effective utilization of cooling oil, preventing oil leakage, and ensuring normal operation and cooling effect of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-27
AI Technical Summary
In existing oil-cooled hub motors, the gas generated after the oil heats up cannot be effectively discharged, leading to oil leakage from the end cap and affecting its use.
An oil-cooled exhaust structure for a hub motor was designed, including a bracket, a labyrinth channel, an air inlet, an exhaust port, and an exhaust pipe. Hot air is discharged from the motor through the labyrinth channel, and cooling oil is reused in the cooling process through the drain port to prevent oil leakage.
It achieves a balance of internal and external pressures in the motor, prevents cooling oil leakage, and ensures normal operation and cooling effect of the motor.
Smart Images
Figure CN224054052U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil cooling exhaust structure of inwheel motor belongs to inwheel motor technical field. BACKGROUND
[0002] Inwheel motor, a kind of motor installed in the middle of wheel, is called inwheel motor.There are two kinds of current inwheel motor cooling mode, one is air cooling, that is, the air flow generated when inwheel is rotated is cooled to its shell, called air cooling, another is oil cooling, that is, a small amount of oil is injected in the inwheel motor to cool the rotor of motor, called oil cooling.Due to the poor heat dissipation effect of air-cooled inwheel motor, rotor generates high temperature, magnetic steel demagnetization, climbing powerlessness and other shortcomings, therefore, oil-cooled inwheel motor with good heat dissipation effect, rotor not easy to generate high temperature, magnetic steel not demagnetization, climbing speed is usually adopted.But the gas generated by the oil in the existing oil-cooled inwheel motor cannot be discharged, which causes the end cover to leak oil and affects use. SUMMARY
[0003] The utility model aims at the shortcomings of prior art, provide a kind of oil cooling exhaust structure of inwheel motor that can exhaust gas.
[0004] To achieve the purpose, the technical scheme adopted by the utility model is:
[0005] Oil cooling exhaust structure of inwheel motor, including support, the side surface of the support is equipped with support side plate, sealing cover is fixed on the cover of the support side plate, the sealing cover and the support side plate form containing cavity, the containing cavity is equipped with labyrinth flow channel, the air inlet is connected on the labyrinth flow channel, the air inlet is located at the side of the labyrinth flow channel, the top of the sealing cover is made with the exhaust hole that communicates with the labyrinth flow channel, the exhaust pipe is connected on the exhaust hole, further including motor shaft, the motor shaft is made with exhaust passage, the end of the exhaust pipe communicates with the exhaust passage, the outlet of the exhaust passage is located at the outside of motor.
[0006] As further optimization of the above technical scheme: the support is stator support.
[0007] As further optimization of the above technical scheme: the labyrinth flow channel is further connected with oil discharge port, and the oil discharge port is located at the bottom of the labyrinth flow channel.
[0008] As further optimization of the above technical scheme: the labyrinth flow channel is further made with exhaust collection port corresponding to the exhaust hole, and the exhaust collection port is located at the top of the labyrinth flow channel.
[0009] As a further optimization of the above technical solution: the exhaust hole is specifically a threaded hole, the exhaust pipe is fitted with a screw cap, the screw shank is threaded onto the exhaust hole, so that the exhaust pipe and the exhaust hole are connected, and a ventilation channel connecting the exhaust hole and the exhaust pipe is formed through the screw.
[0010] Compared with the prior art, in this invention, the increased volume of hot air inside the motor enters the labyrinth flow channel through the air inlet. The gas volume is small, and after rising in the labyrinth flow channel, the air passes through the exhaust collection port, exhaust hole, exhaust pipe, and exhaust channel in sequence before being discharged outside the motor. This ensures the balance of pressure inside and outside the motor, prevents oil leakage from the end cover, and ensures the normal operation of the motor. Since the cooling oil is located below the air inlet, and the air inlet is a side opening, it is difficult for the cooling oil to enter the labyrinth flow channel during the oil slinging process. Even if the cooling oil enters the labyrinth flow channel through the air inlet, it can flow out through the oil outlet and re-participate in the oil slinging and cooling process, thereby preventing the cooling oil from leaking out. Attached Figure Description
[0011] Figure 1 This is an exploded structural diagram of the present invention.
[0012] Figure 2 This is a three-dimensional structural diagram of the bracket in this utility model.
[0013] Figure 3 This is a cross-sectional structural diagram of the present invention located inside the hub motor. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. For example... Figures 1-3 As shown, the oil-cooled exhaust structure of the hub motor includes a bracket 12, a bracket side plate 126 on the side of the bracket 12, and a sealing cover 13 fixedly mounted on the bracket side plate 126. A receiving cavity is formed between the sealing cover 13 and the bracket side plate 126, and a labyrinth flow channel 121 is provided within the receiving cavity. An air inlet 122 and an oil outlet 123 are connected to the labyrinth flow channel 121. An exhaust hole 131 communicating with the labyrinth flow channel 121 is formed on the top of the sealing cover 13, and an exhaust pipe is connected to the exhaust hole 131. The structure also includes a motor shaft 7, on which an exhaust channel 71 is formed. The end of the exhaust pipe communicates with the exhaust channel 71, and the outlet of the exhaust channel 71 is located outside the motor. Figure 1 The exhaust pipe is hidden inside. The labyrinth flow channel 121 is also provided with an exhaust collection port 127 corresponding to the exhaust port 131, so that the gas can be collected and discharged from the exhaust port 131.
[0015] In the above technical solution: the bracket 12 is a stator bracket, and the bracket 12 is in a stationary state and will not rotate synchronously with the wheel hub.
[0016] In the above technical solutions: such asFigure 3 As shown, the oil outlet 123 is located at the bottom of the labyrinth flow passage 121, the air inlet 122 is located at the side of the labyrinth flow passage 121, and the exhaust air collection port 127 is located at the top of the labyrinth flow passage 121, Figure 3 For the state of the bracket 12 inside the motor, since the bracket 12 does not rotate with the motor, the bracket 12 always maintains Figure 3 The state shown.
[0017] In the above technical solution: the exhaust hole 131 is a threaded hole, the exhaust pipe is provided with a cap head of a screw in an interference fit, the rod part of the screw is threadedly installed on the exhaust hole 131, so that the exhaust pipe and the exhaust hole 131 are connected. A ventilation channel is formed in the screw to communicate the exhaust hole 131 and the exhaust pipe.
[0018] The cooling oil level in the motor is located below the air inlet 122, and the cooling oil is subjected to oil throwing cooling along with the rotation of the motor, and at the same time, the cooling oil enters the reduction mechanism 8 to lubricate the sun gear 81, the ring gear 82 and the planet gears 83; the heat generated during the operation of the motor heats the air in the motor, and the volume of the heated air begins to slowly increase. The hot air enters the labyrinth flow passage through the air inlet 122, and the volume of the gas is small. After the air in the labyrinth flow passage rises, it passes through the exhaust air collection port 127, the exhaust hole 131, the exhaust pipe and the exhaust channel 71 in turn, and finally is discharged outside the motor, thereby ensuring the balance of the pressure inside and outside the motor. Since the cooling oil is located below the air inlet 122, and the air inlet 122 is a side opening, it is difficult for the cooling oil to enter the labyrinth flow passage 121 during oil throwing. Even if the cooling oil enters the labyrinth flow passage 121 through the air inlet 122, it can also flow out through the oil outlet 123 and participate in the oil throwing cooling process again, thereby preventing the cooling oil from leaking out.
[0019] The above describes the preferred embodiments of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall fall within the protection scope of the present application.
Claims
1. An oil-cooled exhaust structure of an in-wheel motor, characterized by The application relates to a bracket (12) provided with a bracket side plate (126) on the side of the bracket (12), a sealing cover (13) is fixedly arranged on the bracket side plate (126), a containing cavity is formed between the sealing cover (13) and the bracket side plate (126), a labyrinth flow channel (121) is arranged in the containing cavity, an air inlet (122) is connected to the labyrinth flow channel (121), the air inlet (122) is located on the side of the labyrinth flow channel (121), an exhaust hole (131) is arranged on the top of the sealing cover (13) and is communicated with the labyrinth flow channel (121), an exhaust pipe is connected to the exhaust hole (131), a motor shaft (7) is arranged with an exhaust passage (71), the end of the exhaust pipe is communicated with the exhaust passage (71), and the outlet of the exhaust passage (71) is located outside the motor.
2. The oil-cooled exhaust structure of the in-wheel motor according to claim 1, characterized by The bracket (12) is a stator bracket.
3. The oil-cooled exhaust structure of the in-wheel motor according to claim 1, characterized by An oil outlet (123) is further connected to the labyrinth flow channel (121) and is located at the bottom of the labyrinth flow channel (121).
4. The oil-cooled exhaust structure of the in-wheel motor according to claim 1, characterized by An exhaust collection hole (127) corresponding to the exhaust hole (131) is further arranged on the labyrinth flow channel (121) and is located at the top of the labyrinth flow channel (121).
5. The oil-cooled exhaust structure of an in-wheel motor according to claim 1, characterized by The exhaust hole (131) is a threaded hole, the exhaust pipe is provided with the cap head of a screw in an interference fit, the rod part of the screw is threadedly arranged on the exhaust hole (131), the exhaust pipe and the exhaust hole (131) are connected, and an air passage is arranged in the screw and is communicated between the exhaust hole (131) and the exhaust pipe.