A motor housing for an electric vehicle

Abstract

The utility model relates to a kind of motor shell for electric vehicle, it includes motor shell, end cover, limiting component, the center hole is provided in the center of end cover, the side wall of end cover is provided with three groups of connecting blocks, three groups of connecting blocks are annular array along the axis of center hole, the end of motor shell is provided with flat groove, the side wall of flat groove is provided with three groups of limiting blocks, three groups of limiting blocks are spaced apart with the groove bottom of flat groove, the outer wall of one group of limiting blocks is connected with the limiting component, limiting component limits the rotation of end cover, when end cover rotates to the position that connecting block and limiting block completely overlap, connecting rod on end cover abuts telescopic column, telescopic column moves upward under the elastic force of spring, when the through hole of connecting rod is aligned with telescopic column, telescopic column is reset and inserted into through hole under the action of spring, when end cover needs to be removed, the top of telescopic column is pulled out, and telescopic column is pulled out from the through hole of connecting rod, after canceling restriction, end cover can be removed by rotating, this mode greatly improves the efficiency of assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of motor housings, and in particular to a motor housing for electric vehicles. Background Technology

[0002] In the structure of an electric vehicle motor, the motor housing end cover is a key component, playing a crucial role in sealing the internal components of the motor and protecting it from external environmental interference. However, the motor housing end covers commonly found on the market today present numerous inconveniences in disassembly, causing significant difficulties for motor repair, maintenance, and replacement of internal components.

[0003] Currently, most electric vehicle motor housing end caps are fastened to the housing using multiple bolts. While this method ensures the connection strength and sealing between the end cap and the housing, disassembly requires the use of tools to unscrew each bolt individually, a cumbersome and time-consuming process. Especially after prolonged use, the bolts may become stuck due to rust or dust accumulation, further increasing the difficulty of disassembly and potentially damaging the bolts or deforming the end cap if forced apart. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a motor housing for electric vehicles.

[0005] The present invention provides a motor housing for electric vehicles, which adopts the following technical solution:

[0006] A motor housing for an electric vehicle includes a motor housing, an end cap, and a limiting assembly. The end cap has a central hole at its center, and three sets of connecting blocks are arranged on the sidewall of the end cap in a circular array along the axis of the central hole. The end of the motor housing has a flat groove, and three sets of limiting blocks are arranged on the sidewall of the flat groove in a circular array along the axis of the motor. The three sets of limiting blocks are spaced apart from the bottom of the flat groove, and the distance between the limiting blocks and the bottom of the flat groove is the same as the thickness of the connecting blocks. Sufficient space is left between the three sets of limiting blocks for the connecting blocks to pass through. The connecting blocks rotate within the flat groove. The outer wall of one set of limiting blocks is connected to the limiting assembly, which restricts the rotation of the end cap.

[0007] Optionally, the end cap is provided with a connecting rod, and the connecting rod is provided with a through hole. The limiting assembly includes a fixed rod, a pressure block, a spring, a limiting plate, and a telescopic column. The fixed rod is fixed to the outer wall of the motor housing end, and the end of the fixed rod is connected to the pressure block. The pressure block and the limiting block are spaced apart. Both ends of the telescopic column pass through the pressure block, and the telescopic column is slidably engaged with the pressure block. An inner cavity is provided inside the pressure block. The limiting plate is fixed on the telescopic column and is located in the inner cavity. The spring is also provided in the inner cavity. One end of the spring abuts against the limiting plate, and the other end of the spring abuts against the top wall of the inner cavity. The spring restricts the movement of the telescopic column away from the motor.

[0008] Optionally, the bottom of the telescopic column is configured as a smooth sphere, and the bottom of the telescopic column can be inserted into the through hole of the connecting rod.

[0009] Optionally, the end cap surface is provided with several reinforcing ribs.

[0010] Optionally, the outer surface of the motor housing is provided with a plurality of protective protrusions, which are arranged in a ring array along the axis of the motor housing, and the length direction of the protective protrusions is consistent with the axial direction of the motor housing.

[0011] Optionally, the outer wall of the motor housing is also provided with a number of annular heat dissipation fins at intervals.

[0012] Optionally, the motor housing adopts a double-layer structure, with a 5-8mm gap reserved between the inner and outer layers, and the gap is filled with porous ceramic sound-absorbing material.

[0013] Optionally, a junction box is provided near the bottom of the motor housing, and the junction box is provided with several wire harness holes.

[0014] In summary, this utility model has at least one of the following beneficial technical effects:

[0015] 1. When the end cap is rotated to the position where the connecting block and the limiting block are completely overlapped, the connecting rod on the end cap abuts against the telescopic column. The telescopic column moves upward under the elastic force of the spring. When the through hole of the connecting rod is aligned with the telescopic column, the telescopic column resets and inserts into the through hole under the action of the spring, thereby effectively restricting the rotation of the end cap. When it is necessary to remove the end cap, the top of the telescopic column can be pulled out from the through hole of the connecting rod. After the restriction is removed, the end cap can be rotated to remove it. This method greatly improves the efficiency of assembly and disassembly.

[0016] 2. The length direction of the protective protrusion is consistent with the axial direction of the motor housing. The protective protrusion can form a uniformly distributed protective barrier on the outer surface of the motor housing. When the motor housing is hit or scratched from the side, the protective protrusion will first come into contact with the external object and absorb the collision energy using its own structure, reducing the impact force of the external force directly acting on the main body of the motor housing.

[0017] 3. The motor housing adopts a double-layer structure, with a 5-8mm gap between the inner and outer layers. The gap is filled with porous ceramic sound-absorbing material. When the motor is running, the internal electromagnetic vibration and mechanical friction will generate a lot of noise. The double-layer motor housing itself forms a physical barrier, which can play a certain role in blocking the noise. The porous ceramic sound-absorbing material filled in the 8mm gap between the inner and outer layers has a rich pore structure, which greatly reduces the transmission of noise. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a motor housing used in electric vehicles.

[0019] Figure 2 This is an exploded view of a motor housing used in electric vehicles.

[0020] Figure 3 This is a schematic diagram of the end cap.

[0021] Figure 4 This is a cross-sectional view of a motor housing used in electric vehicles.

[0022] Figure 5 yes Figure 4 Enlarged view of part A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Motor housing; 11. Flat groove; 12. Limiting block; 13. Protective protrusion; 14. Heat dissipation fins; 15. Sound-absorbing material; 2. End cap; 21. Center hole; 22. Connecting block; 23. Connecting rod; 24. Through hole; 25. Reinforcing rib; 3. Limiting assembly; 31. Fixing rod; 32. Pressure block; 33. Spring; 34. Limiting piece; 35. Telescopic column; 36. Inner cavity; 4. Junction box. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] This utility model discloses a motor housing for an electric vehicle. (See reference...) Figure 1-5 A motor housing for an electric vehicle includes a motor housing 1, an end cap 2, and a limiting component 3. The end cap 2 has a central hole 21 at its center. Three sets of connecting blocks 22 are arranged on the side wall of the end cap 2 in a circular array along the axis of the central hole 21. The end of the motor housing 1 has a flat groove 11. Three sets of limiting blocks 12 are arranged on the side wall of the flat groove 11 in a circular array along the axis of the motor. The three sets of limiting blocks 12 are spaced apart from the bottom of the flat groove 11. The distance between the limiting blocks 12 and the bottom of the flat groove 11 is the same as the thickness of the connecting blocks 22. Sufficient space is left between the three sets of limiting blocks 12 to allow the connecting blocks 22 to pass through. The connecting blocks 22 rotate within the flat groove 11. The outer wall of one set of limiting blocks 12 is connected to the limiting component 3, which restricts the rotation of the end cap 2.

[0028] When connecting the motor housing 1 and the end cover 2, first align the end cover 2 with the end of the motor housing 1, so that the three sets of connecting blocks 22 on the end cover 2 are aligned with the space between the three sets of limiting blocks 12 in the flat groove 11 of the motor housing 1. At this time, the connecting blocks 22 can smoothly pass through the gap between the limiting blocks 12 and enter the flat groove 11.

[0029] Subsequently, the end cover 2 is rotated around the axis of the central hole 21 of the end cover 2, causing the connecting block 22 to rotate synchronously in the flat groove 11. When the connecting block 22 rotates to a position completely misaligned with the limiting block 12, since the distance between the limiting block 12 and the bottom of the flat groove 11 is the same as the thickness of the connecting block 22, the limiting block 12 will just form an axial obstruction on the connecting block 22, restricting the connecting block 22 from detaching from the flat groove 11 axially. The limiting component 3 restricts the rotation of the end cover 2, preventing the connecting block 22 from rotating due to vibration or other reasons during motor operation and returning to the space between the limiting blocks 12, thereby achieving a stable connection between the motor housing 1 and the end cover 2.

[0030] Finally, by operating the limiting component 3, it acts on the outer wall of one set of limiting blocks 12, thereby restricting the rotation of the end cover 2 and preventing the connecting block 22 from rotating back into the space between the limiting blocks 12 due to vibration or other reasons during motor operation, thus achieving a stable connection between the motor housing 1 and the end cover 2.

[0031] The end cap 2 is provided with a connecting rod 23, and the connecting rod 23 is provided with a through hole 24. The limiting component 3 includes a fixed rod 31, a pressure block 32, a spring 33, a limiting piece 34, and a telescopic column 35. The fixed rod 31 is fixed to the outer wall of the end of the motor housing 1. The end of the fixed rod 31 is connected to the pressure block 32. The pressure block 32 and the limiting block 12 are spaced apart. Both ends of the telescopic column 35 pass through the pressure block 32. The telescopic column 35 and the pressure block 32 are slidably engaged. The pressure block 32 is provided with an inner cavity 36. The limiting piece 34 is fixed on the telescopic column 35 and is located in the inner cavity 36. The spring 33 is also provided in the inner cavity 36. One end of the spring 33 abuts against the limiting piece 34, and the other end of the spring 33 abuts against the top wall of the inner cavity 36. The spring 33 restricts the telescopic column 35 from moving away from the motor. The bottom of the telescopic column 35 is designed to be smooth and spherical, allowing it to be inserted precisely into the through hole 24 of the connecting rod 23. When the end cap 2 rotates to the position where the connecting block 22 and the limiting block 12 are completely overlapped, the connecting rod 23 on the end cap 2 abuts against the telescopic column 35. The telescopic column 35 moves upward under the elastic force of the spring 33. When the through hole 24 of the connecting rod 23 is aligned with the telescopic column 35, the telescopic column 35 resets and inserts into the through hole 24 under the action of the spring 33, thus effectively restricting the rotation of the end cap 2. When the end cap 2 needs to be removed, the top of the telescopic column 35 can be pulled out of the through hole 24 of the connecting rod 23. After the restriction is removed, the end cap 2 can be rotated to remove the column. This method greatly improves the efficiency of assembly and disassembly.

[0032] The end cap 2 has several reinforcing ribs 25 on its surface, which makes it easier to rotate the end cap 2.

[0033] The outer surface of the motor housing 1 is provided with a number of protective protrusions 13, which are arranged in a ring array along the axis of the motor housing 1. The length direction of the protective protrusions 13 is consistent with the axial direction of the motor housing 1. The protective protrusions 13 can form a uniformly distributed protective barrier on the outer surface of the motor housing 1. When the motor housing 1 is subjected to side collision or scratch, the protective protrusions 13 will first come into contact with the external object and absorb the collision energy by using their own structure, reducing the impact force of the external force directly acting on the main body of the motor housing 1. The outer wall of the motor housing 1 is also provided with a number of annular heat dissipation fins 14 at intervals. The annular design of the fins can expand the heat dissipation area in the radial direction of the motor housing 1. Combined with the axial airflow channel formed by the protective protrusions 13, the air can flow through the gaps between the protrusions in the axial direction when it flows over the surface of the motor housing 1, and can also form radial heat exchange between the annular fins.

[0034] The motor housing 1 adopts a double-layer structure with a 5-8mm gap between the inner and outer layers. The gap is filled with porous ceramic sound-absorbing material 15. When the motor is running, the internal electromagnetic vibration and mechanical friction will generate a lot of noise. The double-layer structure of the motor housing 1 itself forms a physical barrier, which can play a certain role in blocking the noise. The porous ceramic sound-absorbing material 15 filled in the 8mm gap between the inner and outer layers has a rich pore structure, which greatly reduces the transmission of noise.

[0035] A junction box 4 is located near the bottom of the motor housing 1. The junction box 4 has several wire harness holes. The bottom of the motor housing 1 is usually a relatively empty area. Placing the junction box 4 here will not take up space on the top of the motor housing 1.

[0036] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A motor housing for an electric vehicle, characterized in that: The device includes a motor housing (1), an end cap (2), and a limiting assembly (3). The end cap (2) has a central hole (21) at its center. Three sets of connecting blocks (22) are arranged on the sidewalls of the end cap (2), forming a circular array along the axis of the central hole (21). A flat groove (11) is provided at the end of the motor housing (1). Three sets of limiting blocks (12) are arranged on the sidewalls of the flat groove (11), forming a circular array along the axis of the motor. The positioning block (12) is spaced apart from the bottom of the flat groove (11). The distance between the positioning block (12) and the bottom of the flat groove (11) is the same as the thickness of the connecting block (22). There is enough space between the three sets of positioning blocks (12) for the connecting block (22) to pass through. The connecting block (22) rotates in the flat groove (11). The outer wall of one set of positioning blocks (12) is connected to the limiting component (3). The limiting component (3) restricts the rotation of the end cap (2).

2. The motor housing for an electric vehicle according to claim 1, characterized in that: The end cap (2) is provided with a connecting rod (23), and the connecting rod (23) is provided with a through hole (24). The limiting component (3) includes a fixing rod (31), a pressure block (32), a spring (33), a limiting piece (34), and a telescopic column (35). The fixing rod (31) is fixed to the outer wall of the end of the motor housing (1). The end of the fixing rod (31) is connected to the pressure block (32). The pressure block (32) and the limiting block (12) are spaced apart. Both ends of the telescopic column (35) penetrate the pressure block (32). The telescopic column (35) is slidably engaged with the pressure block (32). The pressure block (32) has an inner cavity (36). The limiting piece (34) is fixed on the telescopic column (35) and is located in the inner cavity (36). The spring (33) is also located in the inner cavity (36). One end of the spring (33) abuts against the limiting piece (34), and the other end of the spring (33) abuts against the top wall of the inner cavity (36). The spring (33) restricts the movement of the telescopic column (35) away from the motor.

3. A motor housing for an electric vehicle according to claim 2, characterized in that: The bottom of the telescopic column (35) is set as a smooth sphere, and the bottom of the telescopic column (35) can be inserted into the through hole (24) of the connecting rod (23).

4. A motor housing for an electric vehicle according to claim 2, characterized in that: The end cap (2) has several reinforcing ribs (25) on its surface.

5. A motor housing for an electric vehicle according to claim 1, characterized in that: The outer surface of the motor housing (1) is provided with a plurality of protective protrusions (13), which are arranged in a ring array along the axis of the motor housing (1). The length direction of the protective protrusions (13) is consistent with the axial direction of the motor housing (1).

6. A motor housing for an electric vehicle according to claim 1, characterized in that: The outer wall of the motor housing (1) is also provided with a number of annular heat dissipation fins (14) at intervals.

7. A motor housing for an electric vehicle according to claim 1, characterized in that: The motor housing (1) adopts a double-layer structure, with a 5-8mm gap reserved between the inner and outer layers, and the gap is filled with porous ceramic sound-absorbing material (15).

8. A motor housing for an electric vehicle according to claim 1, characterized in that: The motor housing (1) is provided with a junction box (4) near the bottom, and the junction box (4) is provided with several wire harness holes.

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