Built-in permanent magnet motor for new energy automobile

Abstract

The invention discloses a built-in permanent magnet motor for a new energy automobile. The built-in permanent magnet motor comprises a main fixing plate, a shell, a main fixing support, a stator, a main shaft, a permanent magnet rotor, cooling fins, a heat conduction pipe, a side fixing support, a damper spring, a side fixing plate, cooling fins, a base, a fan, a rear end cover, fan blades, a protection cover, cooling holes, a front end cover, a junction box and a bearing. Heat conduction pipes are fixedly connected to the heat dissipation fins, side fixing supports are fixedly connected to the outer walls of the two sides of the shell, heat dissipation fins are fixedly connected to the side fixing supports, and the heat conduction pipes are fixedly connected to the heat dissipation fins; the anti-vibration structure is designed, and the damping units are arranged on the two sides of the motor, so that vibration acting on the motor in the horizontal direction in the vehicle running process is effectively resisted, the operation stability of the motor is greatly improved through the improvement, the service life of the motor is remarkably prolonged, and the service life of the motor is prolonged. And the stability performance of the vehicle in a complex and changeable driving environment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and specifically to an interior permanent magnet motor for new energy vehicles. Background Technique

[0002] An interior permanent magnet motor, also known as a permanent magnet reluctance motor with a hybrid magnetic circuit, has permanent magnets located inside the rotor. According to the magnetization direction of the permanent magnets and the different magnetic circuit structures, the interior permanent magnet synchronous motor can be divided into three types: radial, tangential, and hybrid. The working principle of the interior permanent magnet synchronous motor is based on electromagnetic induction and the magnetic properties of permanent magnets. When three-phase alternating current is applied to the stator winding, a rotating magnetic field is generated. This rotating magnetic field interacts with the magnetic field generated by the permanent magnets on the rotor, thereby generating torque to drive the rotor to rotate. Due to the presence of permanent magnets, the motor can continue to operate without an external power source providing a magnetic field, thus improving efficiency.

[0003] Existing permanent magnet motors have the following defects: First, when a permanent magnet motor is installed inside a new energy vehicle, its operating environment is relatively complex and variable. Since the vehicle will experience various road conditions and driving states during driving, the permanent magnet motor will inevitably be subjected to vibrations and impacts from the road surface. This continuous vibration may not only cause the performance degradation of the permanent magnet material but also affect the fastening of the internal structure of the motor, thereby leading to mechanical failures or performance degradation. Second, the interior space of a new energy vehicle is relatively compact, especially in the power system part, and the heat dissipation space is relatively limited. However, a permanent magnet motor generates a large amount of heat during operation. If the heat cannot be dissipated in a timely and effective manner, the temperature of the motor will rise, thereby affecting its working efficiency and service life. Although there are currently some heat dissipation designs, such as using cooling fans and heat sinks, in actual applications, these heat dissipation measures are often difficult to fully meet the heat dissipation requirements of the permanent magnet motor. Third, the fixed stability of the permanent magnet motor in a new energy vehicle is crucial for its safe operation. However, due to the bumps and vibrations during vehicle driving and the vibrations generated by the motor itself during operation, the fixed connection between the motor and the vehicle body may become loose or deformed. This lack of fixed stability will not only affect the performance output of the motor but may also pose safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to provide an interior permanent magnet motor for new energy vehicles to solve the problems raised in the above background technique.

[0005] To achieve the above object, the present invention provides the following technical solutions: An in-wheel permanent magnet motor for a new energy vehicle, including a housing, on the outer wall of the housing, there are heat dissipation fins, a heat conduction pipe is fixedly connected to the heat dissipation fins, on both outer walls of the housing, there are side fixing brackets fixedly connected, on the side fixing brackets, there are heat dissipation fins fixedly connected, and the heat conduction pipe is fixedly connected to the heat dissipation fins. On one outer wall of the side fixing bracket, there is a side fixing plate fixedly connected, on one outer wall of the side fixing plate, there is a damping spring fixedly connected, and the other end of the damping spring is fixedly connected to the side fixing bracket. A fifth bolt is sleeved on the side fixing plate.

[0006] As a further technical solution of the present invention, on the outer wall of the housing, there is a main fixing bracket fixedly connected, on the lower surface of the main fixing bracket, there is a main fixing plate, a first bolt is sleeved on the main fixing bracket, at the position corresponding to the first bolt on the main fixing plate, there is a first screw hole, and the first bolt is threadedly connected to the first screw hole.

[0007] As a further technical solution of the present invention, on one side of the housing, there is a base, a second bolt is sleeved on the base, at the position corresponding to the second bolt on the main fixing plate, there is a second screw hole, and the second bolt is threadedly connected to the second screw hole. On one outer wall of the base, there is a fan fixedly connected.

[0008] As a further technical solution of the present invention, inside the housing, there is a main shaft, a permanent magnet rotor is fixedly connected to the main shaft, a stator is sleeved on the permanent magnet rotor, and the stator is fixedly connected to the inner wall of the housing.

[0009] As a further technical solution of the present invention, on one side of the housing, there is a rear end cover, on one outer wall of the rear end cover, there is a fan blade rotatably connected, and the fan blade is fixedly connected to the main shaft.

[0010] As a further technical solution of the present invention, on the outer wall of the rear end cover, there is a first fixing seat fixedly connected, at the position corresponding to the first fixing seat on the outer wall of the housing, there is a second fixing seat fixedly connected, a third bolt is sleeved on the first fixing seat, and the other end of the third bolt is threadedly connected to the second fixing seat.

[0011] As a further technical solution of the present invention, a protective cover is sleeved on the housing, a fourth bolt is sleeved on the protective cover, and the other end of the fourth bolt is threadedly connected to the first fixing seat. On one outer wall of the protective cover, there are heat dissipation holes.

[0012] As a further technical solution of the present invention, on the other side of the housing, there is a front end cover, on the outer wall of the front end cover, there is a third fixing seat fixedly connected, at the position corresponding to the third fixing seat on the outer wall of the housing, there is a fourth fixing seat fixedly connected, a sixth bolt is sleeved on the third fixing seat, and the other end of the sixth bolt is threadedly connected to the fourth fixing seat.

[0013] As a further technical solution of the present invention, a bearing is sleeved on the front end cover, and the bearing is sleeved on the main shaft.

[0014] As a further technical solution of the present invention, a junction box is fixedly connected to the outer wall of the shell.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is designed with an anti-vibration structure, and by configuring shock-absorbing units on both sides of the motor, it is possible to effectively resist the horizontal vibration acting on the motor during the driving of the vehicle. This improvement not only greatly improves the running stability of the motor, but also significantly extends the service life of the motor, ensuring its stable performance in a complex and changeable driving environment. At the same time, a new heat dissipation structure is designed, and the heat generated by the motor during high-speed operation is quickly transferred to the heat dissipation fins through a heat pipe. At the same time, an efficient heat dissipation duct is constructed in a small space through a fan, which greatly improves the heat dissipation efficiency and ensures that the motor can maintain an ideal temperature state even under long-term high-load operation, effectively avoiding performance degradation or failure problems caused by overheating, and through a composite fixing structure, not only the bottom surface of the motor is firmly fixed, but also its two sides are reliably supported and fixed. This all-round, multi-point fixing method enables the motor to maintain extremely high stability when subjected to various complex mechanical environments, further improving the overall reliability and durability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0018] Figure 3 It is a front view structural schematic diagram of the present invention;

[0019] Figure 4 It is a side view structural schematic diagram of the present invention;

[0020] Figure 5 It is a structural explosion diagram of the present invention;

[0021] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of area A in the middle.

[0022] In the figure: 1, main fixing plate; 2, outer shell; 3, main fixing bracket; 4, first screw hole; 5, first bolt; 6, stator; 7, main shaft; 8, permanent magnet rotor; 9, heat dissipation fins; 10, heat conduction tube; 11, side fixing bracket; 12, damping spring; 13, side fixing plate; 14, heat sink; 15, base; 16, fan; 17, second bolt; 18, second screw hole; 19, rear end cover; 20, first fixing seat; 21, third bolt; 22, fan blade; 23, second fixing seat; 24, protective cover; 25, fourth bolt; 26, heat dissipation hole; 27, fifth bolt; 28, front end cover; 29, third fixing seat; 30, fourth fixing seat; 31, sixth bolt; 32, junction box; 33, bearing. Detailed implementation mode

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to the attached Figure 1 - attached Figure 6, an embodiment provided by the present invention: an in - built permanent - magnet motor for a new - energy vehicle, comprising a housing 2. Heat - dissipating fins 9 are arranged on the outer wall of the housing 2. A heat - conducting pipe 10 is fixedly connected to the heat - dissipating fins 9. Side fixing brackets 11 are fixedly connected to the outer walls on both sides of the housing 2. Heat - dissipating fins 14 are fixedly connected to the side fixing brackets 11, and the heat - conducting pipe 10 is fixedly connected to the heat - dissipating fins 14. A side fixing plate 13 is fixedly connected to the outer wall of one side of the side fixing bracket 11. A damping spring 12 is fixedly connected to the outer wall of one side of the side fixing plate 13, and the other end of the damping spring 12 is fixedly connected to the side fixing bracket 11. A fifth bolt 27 is sleeved on the side fixing plate 13; A main fixing bracket 3 is fixedly connected to the outer wall of the housing 2. A main fixing plate 1 is arranged on the lower surface of the main fixing bracket 3. A first bolt 5 is sleeved on the main fixing bracket 3. A first screw hole 4 is provided at the position corresponding to the first bolt 5 on the main fixing plate 1, and the first bolt 5 is threadedly connected to the first screw hole 4. The first bolt 5 is used to fix the main fixing bracket 3 on the main fixing plate 1; A base 15 is arranged on one side of the housing 2. A second bolt 17 is sleeved on the base 15. A second screw hole 18 is provided at the position corresponding to the second bolt 17 on the main fixing plate 1, and the second bolt 17 is threadedly connected to the second screw hole 18. A fan 16 is fixedly connected to the outer wall of one side of the base 15. The second bolt 17 is used to fix the base 15 on the main fixing plate 1; A main shaft 7 is arranged inside the housing 2. A permanent - magnet rotor 8 is fixedly connected to the main shaft 7. A stator 6 is sleeved on the permanent - magnet rotor 8, and the stator 6 is fixedly connected to the inner wall of the housing 2; A rear end - cover 19 is arranged on one side of the housing 2. A fan blade 22 is rotatably connected to the outer wall of one side of the rear end - cover 19, and the fan blade 22 is fixedly connected to the main shaft 7. The fan blade 22 is used for heat dissipation; A first fixing seat 20 is fixedly connected to the outer wall of the rear end - cover 19. A second fixing seat 23 is fixedly connected to the outer wall of the housing 2 at the position corresponding to the first fixing seat 20. A third bolt 21 is sleeved on the first fixing seat 20, and the other end of the third bolt 21 is threadedly connected to the second fixing seat 23. The first fixing seat 20, the third bolt 21 and the second fixing seat 23 are used to fix the rear end - cover 19 on the housing 2; A protective cover 24 is sleeved on the housing 2. A fourth bolt 25 is sleeved on the protective cover 24, and the other end of the fourth bolt 25 is threadedly connected to the first fixing seat 20. A heat - dissipation hole 26 is provided on the outer wall of one side of the protective cover 24. The protective cover 24 is used to protect the fan blade 22, and the fourth bolt 25 is used to fix the protective cover 24 on the first fixing seat 20; A front end - cover 28 is arranged on the other side of the housing 2. A third fixing seat 29 is fixedly connected to the outer wall of the front end - cover 28. A fourth fixing seat 30 is fixedly connected to the outer wall of the housing 2 at the position corresponding to the third fixing seat 29. A sixth bolt 31 is sleeved on the third fixing seat 29, and the other end of the sixth bolt 31 is threadedly connected to the fourth fixing seat 30. The third fixing seat 29, the fourth fixing seat 30 and the sixth bolt 31 are used to fix the front end - cover 28 on the housing 2;A bearing 33 is sleeved on the front end cover 28, and the bearing 33 is sleeved on the main shaft 7. The bearing 33 is used to fix the main shaft 7 and reduce the friction force when the main shaft 7 rotates; a junction box 32 is fixedly connected to the outer wall of the housing 2, and the junction box 32 is used for the connection between the permanent magnet motor and an external power supply and a control system.

[0025] Working principle: When installing and using the present invention, first, the housing 2 is fixed on the main fixing plate 1 through the main fixing bracket 3, the first screw hole 4 and the first bolt 5. The main fixing plate 1 is built in a new energy vehicle. Then, the side fixing plate 13 is fixed on the inner wall of the installation space in the new energy vehicle through the fifth bolt 27 to complete the installation of the permanent magnet motor. The damping springs 12 on the two side fixing brackets 11 effectively resist the horizontal vibration acting on the motor during vehicle driving, ensuring the stability of the motor operation. The bottom surface of the motor is fixed by the main fixing bracket 3 and the side fixing brackets 11, and reliable support and fixation are also provided on both sides. This all-round and multi-point fixing method enables the motor to maintain extremely high stability when bearing various complex mechanical environments, further improving the overall reliability and durability of the motor. In the permanent magnet motor, when an alternating current is passed through the stator 6 coil, a rotating magnetic field is generated and interacts with the permanent magnets on the permanent magnet rotor 8 to generate a Lorentz force. This force causes the permanent magnet rotor 8 to start rotating, thereby converting electrical energy into mechanical energy and then driving the main shaft 7 to rotate. At the same time, when the permanent magnet rotor 8 rotates, the conductor cuts the magnetic field lines and an induced electromotive force will also be generated to achieve energy conversion. The main shaft 7 drives the fan blade 22 on the rear end cover 19 to rotate. The rear end cover 19 is fixed to one end of the housing 2 through the first fixing seat 20, the third bolt 21 and the second fixing seat 23. The airflow generated by the rotation of the fan blade 22 dissipates the heat generated during the operation of the motor through the heat dissipation holes 26 on the protective cover 24. The protective cover 24 is fixed to the rear end cover 19 through the first fixing seat 20 and the fourth bolt 25. The main heat generated during the operation of the motor is dissipated through the heat dissipation fins 9 on the housing 2 and further conducted to the heat dissipation fins 14 on the side fixing bracket 11 through the heat conduction pipe 10 to increase the contact area with the air. The fan 16 is fixed on the main fixing plate 1 through the base 15, the second bolt 17 and the second screw hole 18. The fan 16 blows the airflow in the installation space through the heat dissipation fins 14 to take away the heat on the surface of the heat dissipation fins 14 to achieve efficient heat dissipation. The front end cover 28 is fixed to the other end of the housing 2 through the third fixing seat 29, the fourth fixing seat 30 and the sixth bolt 31, and the main shaft 7 is fixed through the bearing 33. The junction box 32 is used for the connection between the permanent magnet motor and an external power supply and a control system.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An interior permanent magnet motor for a new energy vehicle, comprising a housing (2), characterized in that: On the outer wall of the said housing (2), there are heat dissipation fins (9) provided. A heat conduction pipe (10) is fixedly connected to the heat dissipation fins (9). On the outer walls on both sides of the housing (2), there are side fixing brackets (11) fixedly connected. A heat sink (14) is fixedly connected to the side fixing brackets (11). And the heat conduction pipe (10) is fixedly connected to the heat sink (14). On one outer wall of the side fixing bracket (11), there is a side fixing plate (13) fixedly connected. A damping spring (12) is fixedly connected to one outer wall of the side fixing plate (13). And the other end of the damping spring (12) is fixedly connected to the side fixing bracket (11). A fifth bolt (27) is sleeved on the side fixing plate (13).

2. The built-in permanent magnet motor for new energy vehicle according to claim 1, wherein: On the outer wall of the said housing (2), there is a main fixing bracket (3) fixedly connected. On the lower surface of the main fixing bracket (3), there is a main fixing plate (1). A first bolt (5) is sleeved on the main fixing bracket (3). At the position corresponding to the first bolt (5) on the main fixing plate (1), there is a first screw hole (4) opened. And the first bolt (5) is threadedly connected to the first screw hole (4).

3. The built-in permanent magnet motor for new energy vehicles according to claim 2, wherein: On one side of the said housing (2), there is a base (15) provided. A second bolt (17) is sleeved on the base (15). At the position corresponding to the second bolt (17) on the main fixing plate (1), there is a second screw hole (18) opened. And the second bolt (17) is threadedly connected to the second screw hole (18). On one outer wall of the base (15), there is a fan (16) fixedly connected.

4. The built-in permanent magnet motor for new energy vehicles according to claim 1, characterized in that: Inside the said housing (2), there is a main shaft (7) provided. A permanent magnet rotor (8) is fixedly connected to the main shaft (7). A stator (6) is sleeved on the permanent magnet rotor (8). And the stator (6) is fixedly connected to the inner wall of the housing (2).

5. An in - built permanent magnet motor for a new energy vehicle according to claim 1, wherein: On one side of the said housing (2), there is a rear end cover (19) provided. A fan blade (22) is rotatably connected to one outer wall of the rear end cover (19). And the fan blade (22) is fixedly connected to the main shaft (7).

6. The built-in permanent magnet motor for new energy vehicle according to claim 5, characterized in that: On the outer wall of the said rear end cover (19), there is a first fixing seat (20) fixedly connected. At the position corresponding to the first fixing seat (20) on the outer wall of the housing (2), there is a second fixing seat (23) fixedly connected. A third bolt (21) is sleeved on the first fixing seat (20). And the other end of the third bolt (21) is threadedly connected to the second fixing seat (23).

7. An in-wheel permanent magnet motor for a new energy vehicle according to claim 5, characterized in that: A protective cover (24) is sleeved on the said housing (2). A fourth bolt (25) is sleeved on the protective cover (24). And the other end of the fourth bolt (25) is threadedly connected to the first fixing seat (20). On one outer wall of the protective cover (24), there is a heat dissipation hole (26) opened.

8. The built-in permanent magnet motor for a new energy vehicle according to claim 5, characterized in that: On the other side of the said housing (2), there is a front end cover (28) provided. On the outer wall of the front end cover (28), there is a third fixing seat (29) fixedly connected. At the position corresponding to the third fixing seat (29) on the outer wall of the housing (2), there is a fourth fixing seat (30) fixedly connected. A sixth bolt (31) is sleeved on the third fixing seat (29). And the other end of the sixth bolt (31) is threadedly connected to the fourth fixing seat (30).

9. The built-in permanent magnet motor for new energy vehicles according to claim 8, wherein: A bearing (33) is sleeved on the said front end cover (28). And the bearing (33) is sleeved on the main shaft (7).

10. The built-in permanent magnet motor for a new energy vehicle according to claim 5, characterized in that: A junction box (32) is fixedly connected to the outer wall of the outer shell (2).

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