Motor casing heat dissipation device and water-cooled motor
By setting an annular water flow channel and support inside the motor housing, the problems of uneven heat dissipation and high cost of existing motor housings are solved, achieving uniform heat dissipation and dual motor output within the motor housing, thus reducing energy consumption and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG DEXIN MOTOR CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-05-19
AI Technical Summary
The existing water-cooling structure of the motor housing is complex, and the water flow distance is long, resulting in uneven heat dissipation, increased energy consumption, and high cost when two motors are used together.
The design adopts an annular water flow channel, with the inlet and outlet located in the middle of the motor housing. The water flow channels are axially spaced to form a heat dissipation channel. The water flow channels are sealed to the inner wall of the motor housing, which simplifies the structure, shortens the water flow distance, and increases the uniformity of heat dissipation. A support part is set inside the motor housing to divide it into two drive chambers, realizing dual motor output.
It achieves uniform heat dissipation within the motor housing, reduces water pump energy consumption, simplifies the structure, lowers operating costs, and supports dual motor output, making it suitable for small vehicles.
Smart Images
Figure CN224264758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of new energy vehicle motors, specifically to a motor housing heat dissipation device and a water-cooled motor. Background Technology
[0002] New energy vehicles are currently widely used in various industries. New energy motors require high volumetric density, and dissipating the heat generated by the motor within a limited space is the primary prerequisite for ensuring reliable operation. A search revealed Chinese patent CN209692529U, which discloses a water-cooled structure for a motor housing, including a motor housing and an inner water jacket within the motor housing. The motor housing and the reducer housing are an integral structure, separated by a partition wall. The partition wall has a front bearing seat for the motor. The inner water jacket... The inner water jacket has a spirally arranged water-passing groove around its circumference. One end of the inner water jacket has a protrusion on its end wall, with a central mounting hole. The end wall of the inner water jacket is fixed to the front bearing seat of the motor via the mounting hole through an interference fit, and this fit is sealed by welding. The other end of the inner water jacket is fixed to the motor housing via an interference fit, and this fit is also sealed by welding. The front side wall of the motor housing has a water inlet, and the rear side wall has a water outlet. The water inlet and outlet communicate with the water-passing groove of the inner water jacket, forming a closed cooling water channel.
[0003] The shortcomings of the aforementioned patent are as follows: First, the patent uses a spiral-shaped water-passing groove around the circumference, which has a complex structure and extends the flow distance of the water, resulting in high energy consumption. Second, after the water enters from the inlet at the front of the motor housing, it flows through a long spiral waterway and then out from the outlet at the rear of the motor housing. However, the water begins to exchange heat and cool the motor housing and internal components as soon as it enters the motor housing. This results in the lowest water temperature at the inlet end of the motor housing. As the water flows along the spiral waterway, the water temperature gradually rises. The heat dissipation effect at the front of the motor housing is much better than that at the rear, leading to uneven heat dissipation from front to back. Different components are installed from front to back inside the motor housing, and poor heat dissipation may cause some components to age faster, affecting the overall lifespan of the motor. Third, existing motor housings usually correspond to one output shaft. When two components need to be connected, two motors are required, resulting in high operating costs. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a motor housing heat dissipation device and a water-cooled motor that features a simple structure, a water flow channel that shortens the distance the water flows through, and good heat dissipation uniformity.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A heat dissipation device for a motor housing includes a motor housing and a heat dissipation sleeve disposed inside the motor housing. The device is characterized by: a water inlet and an outlet on the motor housing; an annular water flow channel on the inner wall of the motor housing, the water flow channels being axially spaced apart; an inlet channel and an outlet channel on the outer wall of the heat dissipation sleeve; the inlet channel being connected to the inlet channel; the outlet channel being connected to the outlet channel; one end of the water flow channel being connected to the inlet channel; and the other end being connected to the outlet channel. The inlet channel, water flow channel, and outlet channel cooperate to form a heat dissipation channel. Both ends of the outer wall of the heat dissipation sleeve are sealed and fixedly connected to both ends of the inner wall of the motor housing, so that during use, cold water can be introduced into the heat dissipation channel through the inlet, the water flow within the heat dissipation channel, and the water discharge from the outlet, thereby dissipating heat from the motor housing and internal components.
[0007] The water inlet and outlet of this utility model are located on the motor housing. The water inlet and outlet are axially spaced apart. The outer wall of the heat dissipation sleeve between the water inlet and outlet is tightly abutted against the inner wall of the motor housing to form a seal, so that the water inlet and outlet are not directly connected.
[0008] A water-cooled motor, characterized in that it includes the aforementioned motor housing heat dissipation device, wherein a support portion is provided inside the motor housing, the support portion dividing the interior of the motor housing into a left drive cavity and a right drive cavity, a left drive shaft is provided in the left drive cavity, and a right drive shaft is provided in the right drive cavity, the support portion has a left shaft hole on the left side and a right shaft hole on the right side, the axes of the left drive shaft and the right drive shaft are on the same straight line, the right end of the left drive shaft is inserted into the left shaft hole and fixedly connected to the support portion via a bearing, the left end of the left drive shaft protrudes from the motor housing to form a left drive end, the left end of the right drive shaft is inserted into the right shaft hole and fixedly connected to the support portion via a bearing, the right end of the right drive shaft protrudes from the motor housing to form a right drive end. The support is fixedly connected to the inner wall of the heat sink sleeve. A left motor rotor is fixedly sleeved on the left drive shaft. A left motor stator is provided on the outside of the left motor rotor. The left motor rotor and the left motor stator are configured to cooperate with each other. The left motor stator is fixedly connected to the inner wall of the heat sink sleeve. A right motor rotor is fixedly sleeved on the right drive shaft. A right motor stator is provided on the outside of the right motor rotor. The right motor rotor and the right motor stator are configured to cooperate with each other. The right motor stator is fixedly connected to the inner wall of the heat sink sleeve. Thus, a left motor is formed by the left motor rotor, left motor stator, left drive shaft, and motor housing. A right motor is formed by the right motor rotor, right motor stator, right drive shaft, and motor housing. In this way, a dual motor is formed, and both ends can output drive.
[0009] The water flow channel of this utility model includes a first water channel and a second water channel. The first water channel is provided on both sides of the water inlet, and the second water channel is provided on the side of the first water channel away from the water inlet. The width of the second water channel is greater than the width of the first water channel, so as to facilitate the setting of the second water channel at the left motor stator and the right motor stator. The second water channel is wider than the first water channel, forming a large water flow, which quickly dissipates heat from the left motor stator and the right motor stator.
[0010] This utility model, due to the above-mentioned structure, has the advantages of simple structure, water flow channel shortens the distance of water flow, and good heat dissipation uniformity. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the water-cooled motor in this utility model.
[0012] Figure 2 This is a schematic diagram of one end face of the cross-sectional view of the heat dissipation device for the motor housing in this utility model.
[0013] Figure 3 This is a cross-sectional view of the heat dissipation device for the motor housing in this utility model, from another end view.
[0014] Figure 4 This is an enlarged cross-sectional view of the motor housing in this utility model.
[0015] Figure 5 This is an enlarged schematic diagram of the heat dissipation sleeve in this utility model.
[0016] Figure 6 This is a schematic diagram of the water inlet and outlet of the water-cooled motor in this utility model.
[0017] Reference numerals: 1. Motor housing; 2. Left drive shaft; 3. Right drive shaft; 4. Support part; 5. Left motor rotor; 6. Left motor stator; 7. Right motor rotor; 8. Right motor stator; 22. Water inlet; 23. Water outlet; 24. Heat dissipation channel; 25. Heat dissipation sleeve; 26. Water flow channel; 27. Water inlet channel; 28. Water outlet channel; 29. First water channel; 30. Second water channel. Detailed Implementation
[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0019] A heat dissipation device for a motor housing includes a motor housing 1 and a heat dissipation sleeve 25 disposed inside the motor housing. The device is characterized in that: the motor housing 1 has an inlet 22 and an outlet 23; the inner wall of the motor housing 1 has an annular water flow channel 26, which is axially spaced apart; the outer wall of the heat dissipation sleeve 25 has an inlet channel 27 and an outlet channel 28; the inlet 22 is connected to the inlet channel 27; the outlet 23 is connected to the outlet channel 28; one end of the water flow channel 26 is connected to the inlet channel 27, and the other end is connected to the outlet channel 28; the inlet channel 27, the water flow channel 26, and the outlet channel 28 cooperate to form a heat dissipation channel 24; the two ends of the outer wall of the heat dissipation sleeve 25 are sealed and fixedly connected to the two ends of the inner wall of the motor housing 1, so that during use, cold water can be introduced into the heat dissipation channel through the inlet, the water flows within the heat dissipation channel, and is discharged from the outlet, thereby dissipating heat from the motor housing and internal components.
[0020] The water inlet 22 and water outlet 23 of this utility model are located in the middle of the motor housing 1. The water inlet 22 is located above the water inlet trough 27, and the water outlet 23 is located above the water outlet trough 28. The water inlet trough 27 and the water outlet trough 28 are axially spaced apart. The outer wall of the heat dissipation sleeve 25 between the water inlet trough 27 and the water outlet trough 28 is tightly abutted against the inner wall of the motor housing 1 to form a seal, so that the water inlet trough 27 and the water outlet trough 28 are not directly connected.
[0021] A water-cooled motor, characterized in that it includes the aforementioned motor housing heat dissipation device. The motor housing 1 is provided with a support portion 4, which divides the interior of the motor housing 1 into a left drive chamber and a right drive chamber. A left drive shaft 2 is provided in the left drive chamber, and a right drive shaft 3 is provided in the right drive chamber. The support portion 4 has a left shaft hole on its left side and a right shaft hole on its right side. The axes of the left drive shaft 2 and the right drive shaft 3 are on the same straight line. The right end of the left drive shaft 2 is inserted into the left shaft hole and fixedly connected to the support portion 4 via a bearing. The left end of the left drive shaft 2 protrudes from the motor housing 1 to form the left drive end. The left end of the right drive shaft 3 is inserted into the right shaft hole and fixedly connected to the support portion 4 via a bearing. The right end of the right drive shaft 3 protrudes from the motor housing 1 to form the right drive end. Part 4 is fixedly connected to the inner wall of the heat sink 25. A left motor rotor 5 is fixedly sleeved on the left drive shaft 2. A left motor stator 6 is provided on the outside of the left motor rotor 5. The left motor rotor 5 and the left motor stator 6 are configured to cooperate with each other. The left motor stator 6 is fixedly connected to the inner wall of the heat sink 25. A right motor rotor 7 is fixedly sleeved on the right drive shaft 3. A right motor stator 8 is provided on the outside of the right motor rotor 7. The right motor rotor 7 and the right motor stator 8 are configured to cooperate with each other. The right motor stator 8 is fixedly connected to the inner wall of the heat sink 25. Thus, a left motor is formed by the left motor rotor, left motor stator, left drive shaft, and motor housing. A right motor is formed by the right motor rotor, right motor stator, right drive shaft, and motor housing. In this way, a dual motor is formed, and both ends can output drive.
[0022] The water flow channel 26 of this utility model includes a first water channel 29 and a second water channel 30. The first water channel 30 is provided on both sides of the water inlet 22. The second water channel 30 is provided on the side of the first water channel 29 away from the water inlet 22. The width of the second water channel 30 is greater than the width of the first water channel 29, so as to facilitate the setting of the second water channel 30 at the left motor stator and the right motor stator. The second water channel 30 is wider than the first water channel 29, forming a large water flow, which quickly dissipates heat from the left motor stator and the right motor stator.
[0023] As attached Figure 1-6 This utility model provides a heat dissipation device for a motor housing. The motor housing 1 has an inlet 22 and an outlet 23 in its middle. The inlet 22 is located above an inlet groove 27, and the outlet 23 is located above an outlet groove 28. Water flow grooves 26 are axially spaced from left to right on the inner wall of the motor housing 1. The water flow grooves 26 are annular, but not closed annular. One end of each water flow groove 26 is connected to the inlet groove 27, and the other end is connected to the outlet groove 28. The inlet groove 27 and the outlet groove 28 are arranged axially along the heat dissipation sleeve 25, and are spaced apart. The outer wall of the heat dissipation sleeve 25 between the water outlet troughs 28 is tightly abutted against the inner wall of the motor housing 1 to form a seal. That is, the inner wall of the motor housing 1 between the two ends of the water flow trough 26 is tightly abutted against the outer wall of the heat dissipation sleeve 25 to form a seal, so that the water inlet trough 27 and the water outlet 28 are not directly connected. The water inlet 22 is connected to the water inlet trough 27, and the water outlet 23 is connected to the water outlet trough 28, so that a heat dissipation channel 24 is formed between the motor housing 1 and the heat dissipation sleeve 25. The outer diameter of the outer wall of the heat dissipation sleeve 25 is matched with the inner diameter of the inner wall of the motor housing 1. Sealing rings are set at both ends of the outer wall of the heat dissipation sleeve 25. The heat sink 25 is welded and fixed to the inner wall of the motor housing 1 at both ends. A sealing ring and welding are used to prevent water from flowing out between the heat sink 25 and the motor housing 1. In use, the motor housing 1 and the heat sink 25 are fixedly connected to form the motor housing of the water-cooled motor. The output shaft, rotor, and stator are installed inside the motor housing. The water inlet 22 is connected to a water pump via a water pipe, and the water outlet 23 is connected to a drain tank via a water pipe. Cold water is pumped into the water inlet 22, enters the water inlet trough 27, then flows through the water inlet trough 27 and the water flow trough 26 to the water outlet trough 28, and flows out from the water outlet 23. It can be connected to a drain tank to dissipate heat from the motor housing and the rotor, stator, and drive shaft inside the motor. Compared with the spiral water channel used in the prior art, the annular water flow channel 26 in this invention reduces the flow distance of the water and lowers the energy consumption of the water pump. Moreover, in this invention, cold water enters from the inlet 22 and reaches the inlet channel 27, and then simultaneously enters multiple water flow channels 26 from the inlet channel 27. The water flow channels 26 are distributed at intervals along the axial direction of the motor housing, which makes the heat dissipation uniform throughout the axial direction of the motor housing, indirectly improving the service life of the motor. This invention also provides a water-cooled motor, as shown in the attached figure. Figure 1The motor housing is internally divided into two chambers by a support. The left drive shaft 2 and right drive shaft 3 are fixedly connected to the inner wall of the heat sink 25 via bearings and a support 4. The support 4 is a bracket or plate, fixedly connected to the inner wall of the heat sink 25. The left motor rotor 5 is fixed on the left drive shaft 2, and a left motor stator 6 is fitted over the left motor rotor 5. The right motor rotor 7 is fixed on the right drive shaft 3, and a right motor stator 8 is fitted over the right motor rotor 7. The left motor rotor 5 and left motor stator 6 have the same structure as the rotor and stator in existing motors. The right motor rotor 7 and right motor stator 8 also have the same structure as the rotor and stator in existing motors. This utility model utilizes the left motor rotor 5 and left motor... The left motor is formed by the stator 6, the left drive shaft 2, and the motor housing 1. The right motor is formed by the rotor 7, the right motor stator 8, the right drive shaft 3, and the motor housing 1. Compared with the existing technology where a motor housing has only one output shaft, this utility model achieves two output shafts in one motor housing, resulting in low operating costs. When used as a tire drive motor, the left drive end of the left drive shaft is connected to the input end of a reducer, and the output end of the reducer drives the hub of one tire to rotate. The right drive end of the right drive shaft is connected to the input end of another reducer, and the output end of the reducer drives the hub of the other tire to rotate. This can greatly shorten the axial distance between the two tires, making it particularly suitable for use in small vehicles.
[0024] This utility model, due to the above-mentioned structure, has the advantages of simple structure, water flow channel shortens the distance of water flow, and good heat dissipation uniformity.
Claims
1. A heat dissipation device for a motor housing, comprising a motor housing (1) and a heat dissipation sleeve (25) disposed within the motor housing, characterized in that: The motor housing (1) is provided with an inlet (22) and an outlet (23). The inner wall of the motor housing (1) is provided with an annular water flow groove (26). The water flow groove (26) is axially spaced. The outer wall of the heat dissipation sleeve (25) is provided with an inlet groove (27) and an outlet groove (28). The inlet (22) is connected to the inlet groove (27). The outlet (23) is connected to the outlet groove (28). One end of the water flow groove (26) is connected to the inlet groove (27), and the other end is connected to the outlet groove (28). The inlet groove (27), the water flow groove (26), and the outlet groove (28) cooperate to form a heat dissipation channel (24). The two ends of the outer wall of the heat dissipation sleeve (25) are sealed and fixedly connected to the two ends of the inner wall of the motor housing (1).
2. The heat dissipation device for a motor housing according to claim 1, characterized in that: The inlet (22) and outlet (23) are located in the middle of the motor housing (1). The inlet groove (27) and outlet groove (28) are axially spaced apart. The outer wall of the heat dissipation sleeve (25) between the inlet groove (27) and outlet groove (28) is tightly abutted against the inner wall of the motor housing (1) to form a seal.
3. A water-cooled motor, characterized in that: Includes the motor housing heat dissipation device described in claim 1 or 2 above.
4. A water-cooled motor according to claim 3, characterized in that: The motor housing (1) is provided with a support part (4), which divides the interior of the motor housing (1) into a left drive cavity and a right drive cavity. The left drive cavity is provided with a left drive shaft (2), and the right drive cavity is provided with a right drive shaft (3). The support part (4) has a left shaft hole on the left side and a right shaft hole on the right side. The right end of the left drive shaft (2) is inserted into the left shaft hole and fixedly connected to the support part (4) via a bearing. The left end of the left drive shaft (2) protrudes from the motor housing (1) to form the left drive end. The left end of the right drive shaft (3) is inserted into the right shaft hole and fixedly connected to the support part (4) via a bearing. The right end of the right drive shaft (3) protrudes from the motor housing (1) to form the right drive end. At the end, the support part (4) is fixedly connected to the inner wall of the heat dissipation sleeve (25), the left motor rotor (5) is fixedly sleeved on the left drive shaft (2), the left motor stator (6) is provided on the outside of the left motor rotor (5), the left motor rotor (5) and the left motor stator (6) are configured to cooperate, the left motor stator (6) is fixedly connected to the inner wall of the heat dissipation sleeve (25), the right motor rotor (7) is fixedly sleeved on the right drive shaft (3), the right motor stator (8) is provided on the outside of the right motor rotor (7), the right motor rotor (7) and the right motor stator (8) are configured to cooperate, the right motor stator (8) is fixedly connected to the inner wall of the heat dissipation sleeve (25).
5. A water-cooled motor according to claim 4, characterized in that: The water channel (26) includes a first water channel (29) and a second water channel (30). The first water channel (29) is provided on both sides of the water inlet (22). The second water channel (30) is provided on the side of the first water channel (29) away from the water inlet (22). The width of the second water channel (30) is greater than the width of the first water channel (29).