Motor housing with water cooling structure and heavy truck motor

Abstract

The application relates to a motor shell with a water cooling structure and a heavy truck motor, which comprises a motor outer cylinder, a lower end cover installed at one end of the motor outer cylinder and an upper end cover installed at the other end of the motor outer cylinder; the motor outer cylinder is provided with a cooling section, the cooling section is spirally pre-buried with cooling pipelines with uniform wall thickness along a height direction, the cooling pipelines are provided with cooling channels for cooling liquid flow; the cross section of the cooling pipelines is rectangular; the long side of the cross section of the cooling pipelines is parallel to the axial direction of the motor outer cylinder; the extension line of the short side of the cross section of the cooling pipelines passes through the axis of the motor outer cylinder; the motor outer cylinder is further provided with a water inlet joint in communication with one end of the cooling pipelines and a water outlet joint in communication with the other end of the cooling pipelines. The application has the effects of improving the heat dissipation efficiency of the motor shell on the heavy truck motor and making the motor shell more light.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a motor housing with a water-cooled structure and a heavy-duty truck motor. Background Technology

[0002] Heavy-duty truck motors generate a significant amount of heat during operation. If this heat cannot be dissipated promptly, the motor temperature will rise, affecting its normal operation. Due to water's high specific heat capacity and excellent thermal conductivity, heavy-duty truck motors primarily utilize water cooling. Current water cooling structures for heavy-duty truck motors consist of a spirally wound cooling coil connected to the motor housing. The cooling coil has a circular cross-section. The heat generated by the motor is transferred to the coolant through the coil's wall. The flow of coolant within the coil absorbs and carries away the heat generated by the motor, maintaining its normal operating temperature.

[0003] In view of the aforementioned technologies, the inventors believe that there is a need to provide a motor housing with a water-cooled structure and a heavy-duty truck motor. Utility Model Content

[0004] In order to improve the heat dissipation efficiency of the motor housing for heavy-duty truck motors and make the motor housing lighter, this application provides a motor housing with a water-cooling structure and a heavy-duty truck motor.

[0005] In a first aspect, this application provides a motor housing with a water-cooled structure, employing the following technical solution: A motor housing with a water-cooled structure includes a motor outer cylinder, a lower end cover installed at one end of the motor outer cylinder, and an upper end cover installed at the other end of the motor outer cylinder. The motor outer cylinder has a cooling section, and the cooling section has a cooling pipe with a uniform wall thickness embedded spirally along its height direction. The cooling pipe has a cooling channel for supplying coolant. The cross-section of the cooling pipe is rectangular. The long side of the cross-section of the cooling pipe is parallel to the axial direction of the motor outer cylinder. The extension line of the short side of the cross-section of the cooling pipe passes through the axial direction of the motor outer cylinder. The motor outer cylinder is also provided with a water inlet connector communicating with one end of the cooling pipe and a water outlet connector communicating with the other end of the cooling pipe.

[0006] By adopting the above technical solution, a cooling section is set in the outer cylinder of the motor. The cooling section has a spirally embedded cooling pipe along the height direction. The cross-section of the cooling pipe is rectangular, and the long side of the cross-section of the cooling pipe is parallel to the axis of the outer cylinder of the motor. The extension line of the short side of the cross-section of the cooling pipe passes through the axis of the outer cylinder of the motor. Since the temperature of the outer cylinder of the motor gradually decreases from the inner wall to the outer wall, the side wall of the cooling pipe near the inner wall of the outer cylinder of the motor absorbs the main heat and conducts it to the coolant. This makes the contact area between the rectangular cross-section cooling pipe and the hotter part of the outer cylinder of the motor larger, which improves the heat dissipation efficiency of the motor housing for heavy truck motors under the same coolant flow rate. Moreover, the rectangular cross-section cooling pipe can make the thickness of the motor housing smaller than that of the circular cross-section cooling pipe with the same cross-sectional area, which helps to make the motor housing lighter.

[0007] Optionally, the spacing of the cooling pipes in the vertical direction is 5-6 mm.

[0008] By adopting the above technical solution, since the spacing of the cooling pipes in the height direction is 5-6mm, the arrangement of the cooling pipes in the outer cylinder of the motor is relatively dense and the heat dissipation effect is better while ensuring the structural strength of the outer cylinder of the motor.

[0009] Optionally, the lower end cover has a first snap-fit ​​groove on its upper surface that mates with the outer cylinder of the motor; the bottom of the outer cylinder of the motor has a first threaded hole in its circumferential direction, and the lower end cover has a first through hole in its circumferential direction, and a first bolt that mates with the first threaded hole is installed in the first through hole.

[0010] By adopting the above technical solution, the connection method between the lower end cover and the motor outer cylinder is disclosed. The lower end cover is provided with a first snap-fit ​​groove for the motor outer cylinder, and the motor outer cylinder and the lower end cover are connected by the first threaded hole of the motor outer cylinder and the first bolt of the lower end cover, so that the connection strength between the two is ideal.

[0011] Optionally, the upper end cover has a second snap-fit ​​groove on its lower surface that mates with the outer cylinder of the motor; the top of the outer cylinder of the motor has a second threaded hole in its circumferential direction, and the upper end cover has a second through hole in its circumferential direction, in which a second bolt mates with the second threaded hole is installed.

[0012] By adopting the above technical solution, the connection method between the upper end cover and the motor outer cylinder is disclosed. The upper end cover is provided with a second snap-fit ​​groove for the motor outer cylinder, and the motor outer cylinder and the upper end cover are connected by the second threaded hole of the motor outer cylinder and the second bolt of the upper end cover, so that the connection strength between the two is ideal.

[0013] Optionally, the cooling section occupies 60-80% of the outer cylinder of the motor in the height direction.

[0014] By adopting the above technical solution, the proportion of the cooling section in the height direction of the motor outer cylinder is disclosed. The large proportion of the cooling section in the motor outer cylinder enables the motor outer cylinder to have a better heat dissipation effect on the heavy truck motor.

[0015] Optionally, the outer cylinder of the motor is provided with a first flange at the water inlet end of the cooling pipe, and the water inlet connector is provided with a second flange that mates with the first flange; the end face of the first flange is provided with a first sealing ring groove and a first sealing ring is provided at the first sealing ring groove to seal against the second flange; the first flange and the second flange are connected by screws.

[0016] By adopting the above technical solution, the specific connection structure of the water inlet connector on the outer cylinder of the motor is disclosed. The outer cylinder of the motor is provided with a first flange at the water inlet end of the cooling pipe and a second flange on the water inlet connector. The first flange and the second flange can be connected and fixed to each other by screws and a first sealing ring, so that the water inlet connector on the outer cylinder of the motor has ideal connection strength and strong sealing performance, and also makes the disassembly and assembly of the water inlet connector more convenient.

[0017] Optionally, the outer cylinder of the motor is provided with a third flange at the outlet end of the cooling pipe, and the inlet connector is provided with a fourth flange that mates with the third flange; the end face of the third flange is provided with a second sealing ring groove and a second sealing ring is provided at the second sealing ring groove to seal against the fourth flange; the third flange and the fourth flange are connected by screws.

[0018] By adopting the above technical solution, the specific connection structure of the water outlet connector on the outer cylinder of the motor is disclosed. The outer cylinder of the motor is provided with a third flange at the water outlet end of the cooling pipe and a fourth flange at the water inlet connector. The third flange and the fourth flange can be connected and fixed to each other by screws and a second sealing ring, so that the water inlet connector on the outer cylinder of the motor has ideal connection strength and strong sealing performance, and also makes the disassembly and assembly of the water outlet connector more convenient.

[0019] Secondly, this application provides a heavy-duty truck motor, which adopts the following technical solution: A heavy-duty truck motor includes the motor housing with the aforementioned water-cooling structure.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. A motor housing with a water-cooled structure and a heavy-duty truck motor, wherein a cooling section is provided on the motor housing, and a cooling pipe with a rectangular cross-section is pre-embedded spirally along the height direction of the cooling section, which improves the heat dissipation efficiency of the motor housing for the heavy-duty truck motor and also makes the motor housing lighter. 2. By providing a first snap-fit ​​groove on the upper surface of the lower end cover that mates with the outer cylinder of the motor, and by connecting the outer cylinder of the motor and the lower end cover through the first threaded hole of the outer cylinder of the motor and the first bolt of the lower end cover, the connection strength between the outer cylinder of the motor and the lower end cover is ideal. 3. By setting a first flange at the water inlet end of the cooling pipe on the outer cylinder of the motor, and a first sealing ring on the first flange, and a second flange on the water inlet connector, the first flange and the second flange can be connected and fixed to each other by screws and the first sealing ring, so that the connection strength of the water inlet connector on the outer cylinder of the motor is relatively ideal, and the disassembly and assembly of the water inlet connector are also relatively convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a motor housing with a water-cooled structure and a heavy-duty truck motor in the embodiments of this application.

[0022] Figure 2 This is a cross-sectional schematic diagram of the motor housing in an embodiment of this application.

[0023] Figure 3 This is a cross-sectional schematic diagram of the water inlet connector on the outer cylinder of the motor in this embodiment of the application.

[0024] Figure 4 This is a cross-sectional schematic diagram of the water outlet connector on the outer cylinder of the motor in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Motor outer cylinder; 11. Water inlet connector; 111. Second flange; 112. First elbow; 113. Water inlet pipe; 12. Water outlet connector; 121. Fourth flange; 122. Second elbow; 123. Water outlet pipe; 13. Cooling section; 14. Cooling pipe; 141. Cooling channel; 15. First threaded hole; 16. Second threaded hole; 17. First flange; 171. First sealing ring groove; 172. First sealing ring; 18. Third flange; 181. Second sealing ring groove; 182. Second sealing ring; 2. Lower end cover; 21. First snap-fit ​​groove; 22. First through hole; 23. First bolt; 3. Upper end cover; 31. Second snap-fit ​​groove; 32. Second through hole; 33. Second bolt. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] This application discloses a motor housing with a water-cooling structure. (Refer to...) Figure 1 It includes an outer cylinder of a motor 1, a lower end cover 2 installed at one end of the outer cylinder of the motor 1, and an upper end cover 3 installed at the other end of the outer cylinder of the motor 1. The outer cylinder of the motor 1 is provided with a water inlet connector 11 and a water outlet connector 12. The water inlet connector 11 is close to the lower end cover 2, and the water outlet connector 12 is close to the upper end cover 3.

[0028] refer to Figure 2 The outer cylinder 1 of the motor has a cooling section 13. The cooling section 13 has a spirally embedded cooling pipe 14 with a uniform wall thickness along the height direction. The cooling pipe 14 has a cooling channel 141 for the flow of coolant. The cross-section of the cooling pipe 14 is rectangular, and the long side of the cross-section of the cooling pipe 14 is parallel to the axial direction of the outer cylinder 1 of the motor. The extension line of the short side of the cross-section of the cooling pipe 14 passes through the axial direction of the outer cylinder 1 of the motor. The spacing of the cooling pipes 14 in the height direction is 5-6mm. The cooling section 13 occupies 60-80% of the outer cylinder 1 of the motor in the height direction. In this embodiment, the cooling pipe 14 is a copper pipe, which has excellent thermal conductivity and is easy to process and form. The length of the cross-section of the cooling pipe 14 is 20-25mm, the width is 5-6mm, the distance between the side wall of the cooling pipe 14 near the inner wall of the motor outer cylinder 1 and the inner wall of the motor outer cylinder 1 is 5-6mm, the distance between the side wall of the cooling pipe 14 near the outer wall of the motor outer cylinder 1 and the outer wall of the motor outer cylinder 1 is 6mm, and the wall thickness of the cooling pipe 14 is 0.8-1mm.

[0029] refer to Figure 2 The lower end cover 2 has a first snap-fit ​​groove 21 on its upper surface. The motor outer cylinder 1 is located above the lower end cover 2 and the bottom of the motor outer cylinder 1 can be snapped into the first snap-fit ​​groove 21. The lower end cover 2 has a first through hole 22 in the circumference and a first bolt 23 is installed in the first through hole 22. The bottom of the motor outer cylinder 1 has a first threaded hole 15 in the circumference that mates with the corresponding first bolt 23. The motor outer cylinder 1 and the lower end cover 2 are fixed together by threads, and the connection strength is ideal.

[0030] refer to Figure 2 The upper end cover 3 has a second snap-fit ​​groove 31 on its lower surface. The upper end cover 3 is located above the motor outer cylinder 1. The top of the motor outer cylinder 1 can be snapped into the second snap-fit ​​groove 31. The upper end cover 3 has a second through hole 32 in the circumference and a second bolt 33 is installed in the second through hole 32. The top of the motor outer cylinder 1 has a second threaded hole 16 in the circumference that mates with the corresponding second bolt 33. The motor outer cylinder 1 and the upper end cover 3 are fixed together by threads, and the connection strength is ideal.

[0031] refer to Figure 3 A first flange 17 is provided at the water inlet end of the cooling pipe 14 on the outer cylinder 1 of the motor. A first sealing ring groove 171 is formed on the end face of the first flange 17, and a first sealing ring 172 is arranged on the first sealing ring groove 171. The water inlet connector 11 is provided with a second flange 111 that mates with the first flange 17. The second flange 111 abuts against the first sealing ring 172 and is inserted into the first flange 17 and connected to the first flange 17 by screws. A first elbow 112 is welded to the outside of the second flange 111 of the water inlet connector 11, and a water inlet pipe 113 is welded to the other end of the first elbow 112.

[0032] refer to Figure 4 A third flange 18 is provided at the outlet end of the cooling pipe 14 on the outer cylinder 1 of the motor. A second sealing ring groove 181 is formed on the end face of the third flange 18, and a second sealing ring 182 is arranged on the second sealing ring groove 181. The water outlet connector 12 is provided with a fourth flange 121 that mates with the third flange 18. The fourth flange 121 abuts against the second sealing ring 182 and is inserted into the third flange 18 and connected to the third flange 18 by screws. A second elbow 122 is welded to the outside of the fourth flange 121 on the water outlet connector 12, and a water outlet pipe 123 is welded to the other end of the second elbow 122.

[0033] This application also discloses a heavy-duty truck motor, as described in the embodiments below. Figure 1-4 The heavy-duty truck motor includes the motor housing with the aforementioned water-cooled structure.

[0034] The implementation principle of a water-cooled motor housing and heavy-duty truck motor in this application embodiment is as follows: When the heavy-duty truck motor is started, coolant continuously flows from the water inlet 11 into the cooling pipe 14. Since the heavy-duty truck motor generates a large amount of heat during operation, the outer cylinder 1 of the motor absorbs the heat, and the temperature of the outer cylinder 1 gradually decreases from the inner wall to the outer wall. The side wall of the cooling pipe 14 near the inner wall of the outer cylinder 1 of the motor absorbs the main heat and conducts it to the coolant. The coolant flows out from the water outlet 12 through the cooling pipe 14, carrying away the heat of the heavy-duty truck motor. Since the rectangular cross-section cooling pipe 14 has a large contact area with the high-temperature part of the outer cylinder 1 of the motor, the heat dissipation efficiency of the motor housing for the heavy-duty truck motor can be improved under the same coolant flow rate. Moreover, the rectangular cross-section cooling pipe 14 can make the thickness of the outer cylinder 1 of the motor smaller than that of the circular cross-section cooling pipe 14 of the same cross-sectional area, which helps to make the motor housing lighter.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A motor housing with a water-cooled structure, comprising a motor outer cylinder (1), a lower end cover (2) mounted on one end of the motor outer cylinder (1), and an upper end cover (3) mounted on the other end of the motor outer cylinder (1); characterized in that, The motor outer cylinder (1) has a cooling section (13), and the cooling section (13) has a cooling pipe (14) with a uniform wall thickness embedded spirally along the height direction. The cooling pipe (14) has a cooling channel (141) for the flow of coolant. The cross-section of the cooling pipe (14) is rectangular. The long side of the cross-section of the cooling pipe (14) is parallel to the axial direction of the motor outer cylinder (1). The extension line of the short side of the cross-section of the cooling pipe (14) passes through the axial direction of the motor outer cylinder (1). The motor outer cylinder (1) is also provided with a water inlet connector (11) connected to one end of the cooling pipe (14) and a water outlet connector (12) connected to the other end of the cooling pipe (14).

2. The motor housing with a water-cooled structure according to claim 1, characterized in that, The spacing of the cooling pipes (14) in the vertical direction is 5-6 mm.

3. A motor housing with a water-cooled structure according to claim 1, characterized in that, The lower end cover (2) has a first snap-fit ​​groove (21) on its upper surface that mates with the outer cylinder of the motor (1); the outer cylinder of the motor (1) has a first threaded hole (15) circumferentially at its bottom, and the lower end cover (2) has a first through hole (22) circumferentially therein, and a first bolt (23) mates with the first threaded hole (15) is installed in the first through hole (22).

4. A motor housing with a water-cooled structure according to claim 1, characterized in that, The upper end cover (3) has a second snap-fit ​​groove (31) on its lower surface that mates with the outer cylinder of the motor (1); the top of the outer cylinder of the motor (1) has a second threaded hole (16) circumferentially provided, and the upper end cover (3) has a second through hole (32) circumferentially provided, and a second bolt (33) mates with the second threaded hole (16) is installed in the second through hole (32).

5. A motor housing with a water-cooled structure according to claim 1, characterized in that, The cooling section (13) occupies 60-80% of the height of the motor outer cylinder (1).

6. A motor housing with a water-cooled structure according to claim 1, characterized in that, The outer cylinder of the motor (1) is provided with a first flange (17) at the water inlet end of the cooling pipe (14), and the water inlet connector (11) is provided with a second flange (111) that cooperates with the first flange (17); the end face of the first flange (17) is provided with a first sealing ring groove (171) and a first sealing ring (172) that seals against the second flange (111) is provided at the first sealing ring groove (171); the first flange (17) and the second flange (111) are connected by screws.

7. A motor housing with a water-cooled structure according to claim 1, characterized in that, The outer cylinder (1) of the motor is provided with a third flange (18) at the outlet end of the cooling pipe (14), and the water inlet connector (11) is provided with a fourth flange (121) that mates with the third flange (18); the end face of the third flange (18) is provided with a second sealing ring groove (181) and a second sealing ring (182) that seals against the fourth flange (121) is provided at the second sealing ring groove (181); the third flange (18) and the fourth flange (121) are connected by screws.

8. A heavy-duty truck motor, characterized in that, The motor housing with a water-cooled structure as described in any one of claims 1-7.

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