Wear-resistant motor

Abstract

The application discloses a wear-resistant motor, which comprises a rotating shaft, a stator, two symmetrically arranged rotors, a shell, a front end cover and a rear end cover, and a transmission assembly is arranged between the rotor close to the rear end cover and the rear end cover. Through the arrangement of the transmission assembly, when the motor is started, the rotating shaft drives the rotation of the rotating block and the sliding vane in the gas collecting chamber, a negative pressure is formed in the gas collecting chamber, suction is generated in the motor, gas enters the motor through the communication hole and the air inlet hole to cool the stator, then enters the gas collecting chamber through the air inlet, and then the rotation of the sliding vane is driven by the rotating block to make the gas exhaust from the motor through the exhaust port and the exhaust hole, and the effective cooling of the motor is sequentially and circularly carried out, so that the rotor can stably operate in the axial flux motor, and the performance and working efficiency of the motor are improved.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a wear-resistant motor. Background Technology

[0002] The unique design of axial flux motors gives them significant advantages in the electric vehicle field, especially in terms of lightweighting, high power density, and high efficiency. They are particularly suitable for space-sensitive electric vehicle chassis or wheel hub layouts. Due to their unique magnetic circuit structure, axial flux motors offer significant advantages over traditional radial flux motors, including higher power density, more compact structure, and stronger torque output. Their magnetic flux path is distributed along the axial direction, and the stator and rotor employ a disc-opposed design, resulting in a substantial reduction in axial dimensions. This makes them particularly suitable for space-constrained scenarios with high power requirements.

[0003] When an axial flux motor is running, the stator, located in the middle of the motor and shielded by the rotor and other components, cannot effectively dissipate heat. This is especially true under high speed and high load conditions, where the stator is more prone to overheating. Prolonged high-temperature operation causes the windings to heat up and expand, leading to wear and tear over time. This affects the stable operation of the rotor within the axial flux motor, reducing its performance and efficiency. Permanent magnets are typically glued to the rotor. Facing permanent magnets generate opposing attractive forces. If this force persists, permanent magnets may detach from the carrier. These detached magnets may be flung out by centrifugal force, impacting the stator windings or end insulation, causing short circuits, insulation damage, or even partial discharge or arcing, reducing the motor's safety and efficiency.

[0004] Therefore, in order to solve the above problems, a wear-resistant motor is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a wear-resistant motor to address the problem that, during the operation of an axial flux motor, the stator, located in the middle of the motor and obstructed by components such as the rotor, cannot effectively dissipate heat. This is especially problematic under high speed and high load conditions, where the stator is more prone to overheating. Prolonged high-temperature operation leads to winding expansion and wear, affecting the stable operation of the rotor within the axial flux motor and reducing its performance and efficiency. Typically, permanent magnets are glued to the rotor. Facing permanent magnets generate opposing attractive forces. If this force persists, permanent magnets may detach from the carrier. These detached magnets may be flung out under centrifugal force, impacting the stator windings or end insulation, causing short circuits, insulation damage, or even partial discharge or arcing, thus reducing the motor's safety and efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant motor, comprising a shaft, a stator, two symmetrically arranged rotors, a housing, a front end cover and a rear end cover, wherein a transmission assembly is provided between the rotor near the rear end cover and the rear end cover;

[0007] The transmission assembly includes a fixed block that is rotatably and sealingly connected to the outer wall of the rotating shaft. The fixed block has an air collecting chamber that is off-axis. A rotating block is rotatably connected inside the air collecting chamber. The rotating block is fixedly connected to the rotating shaft. The rotating block has multiple circumferentially distributed sliding grooves. Each sliding groove has a sliding blade that is slidably connected to it. Each sliding blade is connected to the corresponding sliding groove by an elastic element.

[0008] Preferably, a partition is fixedly connected inside the rear cover, and the other end of the partition is fixedly connected to the fixing block. A first chamber is formed between the partition and the front cover, and a second chamber is formed between the partition and the rear cover.

[0009] Preferably, the outer wall of the fixing block is provided with an air inlet and an air outlet, the first chamber is connected to the air collection chamber through the air inlet, and the second chamber is connected to the air collection chamber through the air outlet.

[0010] Preferably, the front end cover has multiple circumferentially equidistant connecting holes on its outer side, through which gas enters the interior of the front end cover.

[0011] Preferably, the front end cover is fixedly connected to the rear end cover through the outer shell, and the outer wall of the outer shell has a plurality of air inlets distributed equidistantly in a circle. Gas can enter the interior of the outer shell through the air inlets and cool the stator.

[0012] Preferably, each rotor has multiple evenly distributed ventilation slots, so that the gas entering the front end cover and the gas entering the outer shell can enter the first chamber through the ventilation slots, and the gas entering the first chamber can enter the gas collecting chamber through the air inlet.

[0013] Preferably, by starting the motor, the rotating shaft drives the rotating block to rotate inside the gas collecting chamber, and according to the rotation of the rotating block and the sliding blade, the gas entering from the air inlet is discharged into the second chamber through the exhaust port.

[0014] Preferably, the outer wall of the rear end cover has a plurality of circumferentially equidistant exhaust holes, through which the gas entering the second chamber can be discharged from the motor.

[0015] Preferably, the two rotors are located at the two ends of the stator, and the center of each rotor is fixedly connected to the outer wall of the shaft. Each rotor has a permanent magnet that is equidistantly distributed in a circle on the side closest to the stator. Both ends of each permanent magnet are inclined surfaces. A fixing pin is provided between every two permanent magnets. The end of the fixing pin away from the stator is fixedly connected to the rotor. Both ends of each fixing pin are inclined surfaces, and the inclined surfaces of the fixing pin and the permanent magnets are in contact with each other.

[0016] Preferably, the outer wall of the stator is fixedly connected to the inner wall of the outer casing, and the stator is provided with a plurality of windings distributed equidistantly in a circle.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. Through the transmission components, when the car motor starts, the rotating shaft drives the rotating block and sliding blade to rotate in the air collection chamber, which creates a negative pressure inside the air collection chamber. This generates suction inside the motor, allowing gas to enter the car motor through the connecting hole and the air inlet to cool the stator. Then, the gas enters the air collection chamber through the air inlet, and then the rotating block drives the sliding blade to rotate, allowing the gas to be discharged from the motor through the exhaust port and exhaust hole. This cycle is repeated to effectively cool the inside of the car motor, thereby making the rotor run stably in the axial flux motor, thus improving the performance and working efficiency of the car motor.

[0019] 2. By setting the fixing pin, the contact surface between the fixing pin and the permanent magnet is an inclined surface, and the side part of the permanent magnet is pressed and supported by the inclined surface of the fixing pin. In this structure, the permanent magnet and the fixing pin can have a trapezoidal cross-section, which can effectively prevent the permanent magnet from detaching and improve the safety and working efficiency of the motor. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall exploded structure of the present invention;

[0022] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the fixing block structure of the present invention;

[0024] Figure 5 This is a cross-sectional view of the fixing block structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the permanent magnet and fixing pin structure of the present invention.

[0026] The attached figures are labeled as follows: 1. Shaft; 2. Stator; 21. Winding; 3. Rotor; 31. Permanent magnet; 32. Vent groove; 33. Fixing pin; 4. Outer shell; 41. Air inlet; 5. Front end cover; 51. Connecting hole; 6. Rear end cover; 61. Partition; 62. Exhaust port; 611. First chamber; 612. Second chamber; 7. Transmission assembly; 71. Fixing block; 72. Air collection chamber; 73. Rotating block; 74. Sliding groove; 75. Sliding blade; 76. Elastic element; 77. Air inlet; 78. Exhaust port. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] When an axial flux motor is running, the stator is located in the middle of the motor and is blocked by the rotor and other components, so the stator cannot be effectively cooled. Especially under high speed and high load conditions, the stator is more likely to heat up. When running at high temperature for a long time, the windings will heat up and expand. Long-term use will result in wear and loss, which will affect the stable operation of the rotor in the axial flux motor and reduce the performance and efficiency of the motor.

[0030] like Figures 1 to 6 As shown, an embodiment of the present invention provides a wear-resistant motor, which includes a rotating shaft 1, a stator 2, two symmetrically arranged rotors 3, a housing 4, a front end cover 5 and a rear end cover 6, and a transmission assembly 7 is provided between the rotor 3 near the rear end cover 6 and the rear end cover 6.

[0031] like Figures 2 to 5 As shown, the transmission assembly 7 includes a fixed block 71 that is rotatably and sealingly connected to the outer wall of the rotating shaft 1. An air collecting chamber 72 is provided inside the fixed block 71. The air collecting chamber 72 is off-axis. A rotating block 73 is rotatably connected inside the air collecting chamber 72. The rotating block 73 is fixedly connected to the rotating shaft 1. A plurality of circumferentially distributed sliding grooves 74 are provided inside the rotating block 73. A sliding blade 75 is slidably connected in each sliding groove 74. An elastic element 76 is connected between each sliding blade 75 and the corresponding sliding groove 74.

[0032] like Figure 3 As shown, a partition 61 is fixedly connected inside the rear cover 6, and the other end of the partition 61 is fixedly connected to the fixing block 71. A first chamber 611 is formed between the partition 61 and the front cover 5, and a second chamber 612 is formed between the partition 61 and the rear cover 6.

[0033] like Figures 1 to 3 As shown, the outer wall of the fixed block 71 has an air inlet 77 and an exhaust outlet 78. The first chamber 611 is connected to the gas collecting chamber 72 through the air inlet 77, and the second chamber 612 is connected to the gas collecting chamber 72 through the exhaust outlet 78. Multiple circumferentially spaced connecting holes 51 are provided on the outer side of the front cover 5, allowing gas to enter the interior of the front cover 5 through the connecting holes 51. The front cover 5 is fixedly connected to the rear cover 6 through the outer shell 4. Multiple circumferentially spaced air inlets 41 are provided on the outer wall of the outer shell 4, allowing gas to enter the interior of the outer shell 4 and cool the stator 2. Multiple evenly distributed ventilation slots 32 are provided on each rotor 3, allowing gas to enter the interior of the front cover 4. The gas inside the end cover 5 and the gas entering the outer casing 4 can both enter the first chamber 611 through the venting groove 32. The gas entering the first chamber 611 can enter the gas collecting chamber 72 through the air inlet 77. When the motor is started, the rotating shaft 1 drives the rotating block 73 to rotate inside the gas collecting chamber 72. According to the rotation of the rotating block 73 and the sliding vane 75, the gas entering from the air inlet 77 is discharged into the second chamber 612 through the exhaust port 78. The outer wall of the rear end cover 6 has multiple exhaust holes 62 that are circumferentially distributed. The gas entering the second chamber 612 can be discharged from the motor through the exhaust holes 62. For the specific working principle, please refer to the vane pump.

[0034] With the transmission component 7 in place, when the motor starts, the rotating block 73 and the sliding blade 75 are driven to rotate by the rotating shaft 1, so that the gas entering the motor enters the gas collection chamber 72 through the air inlet 77, and then exits the motor through the exhaust port 78 and the exhaust hole 62.

[0035] like Figure 2 and Figure 3 As shown, two rotors 3 are located at the two ends of the stator 2 respectively. The center of each rotor 3 is fixedly connected to the outer wall of the rotating shaft 1. Each rotor 3 is fixedly connected to a permanent magnet 31 that is circumferentially distributed on the side near the stator 2. The permanent magnet 31 has N poles and S poles, and the N poles and S poles are alternately arranged in a ring on the rotor 3. The outer wall of the stator 2 is fixedly connected to the inner wall of the outer shell 4. The stator 2 is provided with multiple windings 21 that are circumferentially distributed.

[0036] In actual use, after the motor starts, the rotating shaft 1 will drive the rotating block 73 to rotate together. When the rotating block 73 rotates in the air collecting chamber 72, the sliding blade 75 will slide in the sliding groove 74 under the pressure of the inner wall of the air collecting chamber 72 and squeeze the elastic element 76. Under the rapid rotation of the rotating block 73, a negative pressure will be formed inside the air collecting chamber 72, which will generate suction inside the motor, allowing the gas to enter the motor through the connecting hole 51 on the front cover 5 and the air inlet 41 on the outer shell 4 to cool the stator 2. Then, the gas enters the first chamber 611 through the ventilation groove 32 on the rotor 3. The gas entering the first chamber 611 then enters the air collecting chamber 72 through the air inlet 77. Then, the rotating block 73 drives the sliding blade 75 to rotate, allowing the gas to enter the second chamber 612 through the exhaust port 78 on the fixed block 71. Finally, the gas is discharged from the motor through the exhaust port 62 on the rear cover 6. This cycle is repeated to effectively cool the inside of the motor.

[0037] In summary, through the configuration of the transmission component 7, when the motor starts, the rotating shaft 1 drives the rotating block 73 and the sliding blade 75 to rotate in the air collecting chamber 72, which creates a negative pressure inside the air collecting chamber 72. This generates suction inside the motor, allowing gas to enter the motor through the connecting hole 51 and the air inlet 41 to cool the stator 2. Then, the gas enters the air collecting chamber 72 through the air inlet 77. The rotating block 73 then drives the sliding blade 75 to rotate, allowing the gas to exit the motor through the exhaust port 78 and the exhaust hole 62. This cycle is repeated to effectively cool the inside of the motor, thereby ensuring stable operation of the rotor 3 within the axial flux motor and improving the motor's performance and working efficiency.

[0038] Example 2

[0039] Permanent magnets are usually glued to the rotor. Permanent magnets facing each other will generate an attractive force with opposite polarities. If this attraction continues, the permanent magnets may detach from the carrier due to the force. The detached permanent magnets may be thrown out under the action of centrifugal force and hit the stator windings or end insulation, causing short circuits in the windings, insulation damage, or even partial discharge or arc erosion, which reduces the safety and working efficiency of the motor. Therefore, this embodiment improves the device described in the above embodiment.

[0040] like Figures 2 to 6 As shown, two rotors 3 are located at the two ends of the stator 2 respectively. The center of each rotor 3 is fixedly connected to the outer wall of the rotating shaft 1. Each rotor 3 has a permanent magnet 31 that is circumferentially distributed at equal intervals on the side closest to the stator 2. Both ends of each permanent magnet 31 are inclined surfaces. A fixing pin 33 is provided between every two permanent magnets 31. The end of the fixing pin 33 away from the stator 2 is fixedly connected to the rotor 3. Both ends of each fixing pin 33 are inclined surfaces. The inclined surfaces of the fixing pin 33 and the inclined surfaces of the permanent magnets 31 fit together. The fixing pin 33 is made of non-magnetic material.

[0041] In practical use, since the two rotors 3 are located at the two ends of the stator 2 respectively, the permanent magnet 31 has N poles and S poles, and the N poles and S poles are alternately arranged in a ring on the rotor 3. The permanent magnets 31 of the two rotors 3 are arranged face to face. The contact surfaces of the permanent magnets 31 and the fixing pins 33 have contour angles to form inclined surfaces of the contact surfaces of the fixing pins 33 and the permanent magnets 31. The side part of the permanent magnets 31 is pressed and supported by the inclined surfaces of the fixing pins 33. In this structure, the permanent magnets 31 and the fixing pins 33 can have trapezoidal cross sections, which can effectively prevent the permanent magnets 31 from detaching.

[0042] In summary, by setting the fixing pin 33, the contact surface between the fixing pin 33 and the permanent magnet 31 is an inclined surface, and the side part of the permanent magnet 31 is pressed and supported by the inclined surface of the fixing pin 33. In this structure, the permanent magnet 31 and the fixing pin 33 can have a trapezoidal cross section, which can effectively prevent the permanent magnet 31 from detaching and improve the safety and working efficiency of the motor.

[0043] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wear-resistant motor, comprising a shaft, a stator, two symmetrically arranged rotors, a housing, a front end cover, and a rear end cover, characterized in that, A transmission assembly is provided between the rotor and the rear end cover near the rear end cover; The transmission assembly includes a fixed block that is rotatably and sealingly connected to the outer wall of the rotating shaft. The fixed block has an air-collecting chamber, which is offset from the shaft. A rotating block is rotatably connected inside the air-collecting chamber and is fixedly connected to the rotating shaft. The rotating block has multiple circumferentially equidistant sliding grooves. Each sliding groove has a sliding blade slidably connected to it, and each sliding blade is connected to its corresponding sliding groove by an elastic element. A partition is fixedly connected inside the rear end cover, and the other end of the partition is fixedly connected to the fixed block. The partition and the front end cover form a first chamber, and the partition and the rear end cover form a second chamber. The outer wall of the fixing block has an air inlet and an exhaust outlet. The first chamber is connected to the gas collection chamber through the air inlet, and the second chamber is connected to the gas collection chamber through the exhaust outlet. The front end cover is fixedly connected to the rear end cover through the outer shell. The outer wall of the outer shell has multiple air inlets that are equidistantly distributed in a circle. Gas can enter the interior of the outer shell through the air inlets, which can cool the stator. When the rotating block rotates within the gas collecting chamber, the sliding blades slide within the sliding groove under the pressure of the inner wall of the gas collecting chamber, compressing the elastic element. As the rotating block rotates rapidly, a negative pressure is formed inside the gas collecting chamber, generating suction inside the motor. This allows gas to enter the motor through the connecting hole on the front cover and the air inlet on the outer casing to cool the stator. The gas then enters the first chamber through the ventilation groove on the rotor. The gas inside the first chamber then enters the gas collecting chamber through the air inlet. The rotating block then drives the sliding blades to rotate, allowing the gas to enter the second chamber through the exhaust port on the fixed block. Finally, the gas is discharged from the motor through the exhaust port on the rear cover. This cycle is repeated to cool the inside of the motor.

2. The wear-resistant motor according to claim 1, characterized in that: The front cover has multiple circumferentially distributed connecting holes on its outer side, through which gas enters the interior of the front cover.

3. The wear-resistant motor according to claim 2, characterized in that: Each rotor has multiple evenly distributed ventilation slots. Gas entering the front cover and gas entering the outer shell can enter the first chamber through the ventilation slots. Gas entering the first chamber can enter the gas collecting chamber through the air inlet.

4. The wear-resistant motor according to claim 3, characterized in that: When the motor is started, the rotating shaft drives the rotating block to rotate inside the gas collecting chamber. Based on the rotation of the rotating block and the sliding blade, the gas entering from the air inlet is discharged into the second chamber through the exhaust port.

5. A wear-resistant motor according to claim 4, characterized in that: The outer wall of the rear end cover has multiple circumferentially equidistant exhaust holes, through which gas entering the second chamber can be discharged from the motor.

6. A wear-resistant motor according to claim 5, characterized in that: The two rotors are located at the two ends of the stator, and the center of each rotor is fixedly connected to the outer wall of the shaft. Each rotor has a permanent magnet that is equidistantly distributed in a circle on the side closest to the stator. Both ends of each permanent magnet are inclined surfaces. A fixing pin is provided between every two permanent magnets. The end of the fixing pin away from the stator is fixedly connected to the rotor. Both ends of each fixing pin are inclined surfaces, and the inclined surfaces of the fixing pin and the permanent magnets are in contact with each other.

7. A wear-resistant motor according to claim 6, characterized in that: The outer wall of the stator is fixedly connected to the inner wall of the outer casing, and the stator is provided with a plurality of windings distributed equidistantly in a circle.

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