Wear-resistant motor

Abstract

The invention 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 a transmission assembly, after a motor is started, when a rotating shaft drives a rotating block and a sliding blade to rotate in a gas collection chamber, negative pressure is formed in the gas collection chamber, suction force is generated in the motor, gas enters the motor through a communicating hole and a gas inlet hole to cool a stator, and then the gas enters the gas collection chamber through a gas inlet; and then the rotating block drives the sliding blades to rotate so that the gas is discharged out of the motor through the exhaust port and the exhaust hole, and the internal part of the motor is effectively cooled through sequential circulation, so that the rotor stably operates in the axial magnetic flux motor, and the performance and the working efficiency of the motor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a wear-resistant motor. Background Art

[0002] The unique design of the axial flux motor makes it show significant advantages in the field of electric vehicles, especially in terms of lightweight, high power density and high efficiency. It is particularly suitable for space-sensitive electric vehicle chassis or wheel hub layout. Due to its unique magnetic circuit structure, the axial flux motor has significant advantages over traditional radial flux motors, such as high power density, compact structure, and strong torque output capacity. Its magnetic flux path is distributed along the axial direction, and the stator and rotor adopt a disc-type opposing design, which greatly reduces the axial size, making it particularly suitable for scenarios with limited space but high power requirements.

[0003] When the 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 it is impossible to effectively dissipate heat for the stator. 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 winding will heat up and expand. Long-term use will cause wear and loss, which will affect the stable operation of the rotor in the axial flux motor and reduce the performance and work efficiency of the motor. Usually, permanent magnets are glued to the rotor. The permanent magnets facing each other will generate a force of attraction with opposite polarity. If this force continues to act, the permanent magnet may be separated from the carrier due to this force. The detached permanent magnet may be thrown out under the action of centrifugal force and hit the stator winding or end insulation, causing winding short circuit, insulation damage, and even partial discharge or arc erosion, reducing the safety and work efficiency of the motor.

[0004] Therefore, in order to solve the above problems, a wear-resistant motor needs to be provided. Summary of the invention

[0005] The purpose of the present invention is to provide a wear-resistant motor to solve the problem that when the 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 winding will heat up and expand. Long-term use will cause wear and loss, thereby affecting the stable operation of the rotor in the axial flux motor and reducing the performance and work efficiency of the motor. Usually, permanent magnets are glued to the rotor, and the permanent magnets facing each other will generate a mutually attractive force with opposite polarities. If this gravitational force continues to act, the permanent magnet may be separated from the carrier due to this force. The detached permanent magnet may be thrown out under the action of centrifugal force and hit the stator winding or end insulation, resulting in winding short circuit, insulation damage, and even local discharge or arc erosion, reducing the safety and work efficiency of the motor.

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

[0007] The transmission assembly includes a fixed block which is sealingly and rotatably connected to the outer wall of the rotating shaft, a gas collecting chamber is provided in the fixed block, the gas collecting chamber is eccentrically arranged, a rotating block is rotatably connected inside the gas collecting chamber, the rotating block is fixedly connected to the rotating shaft, a plurality of sliding grooves which are equidistantly distributed around the circumference are provided in the rotating block, each of the sliding grooves is slidably connected to a sliding leaf, and an elastic member is connected between each sliding leaf and the corresponding sliding groove.

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

[0009] Preferably, an air inlet and an air outlet are formed on an outer wall of the fixing block, the first chamber is connected to the air collecting chamber through the air inlet, and the second chamber is connected to the air collecting chamber through the air outlet.

[0010] Preferably, a plurality of communication holes equidistantly distributed in a circumference are formed on the outer side of the front end cover, and the gas enters the interior of the front end cover through the communication holes.

[0011] Preferably, the front end cover is fixedly connected to the rear end cover through the shell, and the outer wall of the shell is provided with a plurality of air inlet holes equidistantly distributed around the circumference, through which gas can enter the interior of the shell to cool the stator.

[0012] Preferably, each of the rotors is provided with a plurality of evenly distributed ventilation grooves, and the gas entering the front end cover and the gas entering the outer shell can both enter the first chamber through the ventilation grooves, 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 leaf, 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 is provided with a plurality of exhaust holes which are equidistantly distributed around the circumference, and the gas entering the second chamber can be discharged from the interior of the motor through the exhaust holes.

[0015] Preferably, the two rotors are respectively located at the two ends of the stator, and the center of each rotor is fixedly connected to the outer wall of the rotating shaft. The side of each rotor close to the stator is fixedly connected to permanent magnets distributed equidistantly around the circumference, and both end surfaces of each permanent magnet are inclined surfaces. A fixing pin is arranged between every two permanent magnets, and one end of the fixing pin away from the stator is fixedly connected to the rotor. Both end surfaces of each fixing pin are inclined surfaces, and the inclined surfaces of the fixing pin and the inclined surfaces of the permanent magnet are in contact with each other.

[0016] Preferably, the outer wall of the stator is fixedly connected to the inner wall of the housing, and a plurality of windings equidistantly distributed around the circumference are provided in the stator.

[0017] Technical effects and advantages of the present invention:

[0018] 1. Through the setting of the transmission component, when the automobile motor is started, the rotating shaft will drive the rotating block and the sliding leaf to rotate in the air collecting chamber, which will form a negative pressure inside the air collecting chamber, so that suction is generated inside the motor, allowing the gas to enter the automobile motor through the connecting hole and the air inlet hole to cool the stator, and then enter the air collecting chamber through the air inlet, and then drive the rotation of the sliding leaf through the rotating block to allow the gas to be discharged from the motor through the exhaust port and the exhaust hole, and the cycle is repeated in sequence to effectively cool the inside of the automobile motor, so that the rotor can run stably in the axial flux motor, thereby improving the performance and working efficiency of the automobile motor;

[0019] 2. Through the setting of 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 pressurized 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, thereby improving the safety and working efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0026] The accompanying drawings are marked as follows: 1. rotating shaft; 2. stator; 21. winding; 3. rotor; 31. permanent magnet; 32. ventilation 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 hole; 611. first chamber; 612. second chamber; 7. transmission assembly; 71. fixed block; 72. air collecting chamber; 73. rotating block; 74. sliding groove; 75. sliding leaf; 76. elastic member; 77. air inlet; 78. exhaust. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] When the axial flux motor is running, since the stator is located in the middle of the motor and is blocked by components such as the rotor, 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 winding will heat up and expand, and wear and loss will occur during long-term use, thus affecting the stable operation of the rotor in the axial flux motor and reducing the performance and working efficiency of the motor.

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

[0031] like Figures 2 to 5 As shown, the transmission assembly 7 includes a fixed block 71 which is sealingly rotatably connected to the outer wall of the rotating shaft 1, and a gas collecting chamber 72 is provided in the fixed block 71. The gas collecting chamber 72 is set off-axis, and a rotating block 73 is rotatably connected inside the gas collecting chamber 72. The rotating block 73 is fixedly connected to the rotating shaft 1, and a plurality of sliding grooves 74 which are equidistantly distributed around the circumference are provided in the rotating block 73. A sliding leaf 75 is slidably connected in each sliding groove 74, and an elastic member 76 is connected between each sliding leaf 75 and the corresponding sliding groove 74.

[0032] like Figure 3 As shown, a partition 61 is fixedly connected inside the rear end 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 end cover 5, and a second chamber 612 is formed between the partition 61 and the rear end cover 6.

[0033] like Figures 1 to 3 As shown, an air inlet 77 and an air outlet 78 are provided on the outer wall of the fixed block 71, the first chamber 611 is connected to the air collecting chamber 72 through the air inlet 77, and the second chamber 612 is connected to the air collecting chamber 72 through the air outlet 78. A plurality of connecting holes 51 equidistantly distributed around the circumference are provided on the outer side of the front end cover 5, and the gas enters the interior of the front end cover 5 through the connecting holes 51. The front end cover 5 is fixedly connected to the rear end cover 6 through the outer shell 4, and a plurality of air inlet holes 41 equidistantly distributed around the circumference are provided on the outer wall of the outer shell 4, and the gas can enter the interior of the outer shell 4 through the air inlet holes 41, and can cool the stator 2. A plurality of evenly distributed ventilation grooves 32 are provided on each rotor 3, and the gas can enter the front end cover 5 through the connecting holes 51. The gas inside the end cover 5 and the gas entering the shell 4 can both enter the first chamber 611 through the ventilation groove 32. The gas entering the first chamber 611 can enter the gas collecting chamber 72 through the air inlet 77. By starting the motor, the rotating shaft 1 drives the rotating block 73 to rotate inside the gas collecting chamber 72, and according to the rotation of the rotating block 73 and the sliding leaf 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 is provided with a plurality of exhaust holes 62 equidistantly distributed around the circumference. The gas entering the second chamber 612 can be discharged from the inside of the motor through the exhaust holes 62. The specific working principle can be referred to the vane pump.

[0034] Through the setting of the transmission assembly 7, when the motor is started, the rotating block 73 and the sliding leaf 75 are driven to rotate through the rotating shaft 1, so that the gas entering the motor enters the gas collecting chamber 72 through the air inlet 77, and then is discharged from the motor through the exhaust port 78 and the exhaust hole 62.

[0035] like Figure 2 and Figure 3 As shown, the two rotors 3 are respectively located at the two ends of the stator 2, and the center of each rotor 3 is fixedly connected to the outer wall of the rotating shaft 1. The side of each rotor 3 close to the stator 2 is fixedly connected to a permanent magnet 31 distributed equidistantly around the circumference, and the permanent magnet 31 has an N pole and an S pole, and the N pole and the S pole are alternately formed into a ring and installed on the rotor 3. The outer wall of the stator 2 is fixedly connected to the inner wall of the shell 4, and a plurality of windings 21 distributed equidistantly around the circumference are provided in the stator 2.

[0036] When the rotating block 73 rotates in the air collecting chamber 72, the sliding leaf 75 will slide in the sliding groove 74 and squeeze the elastic member 76 under the pressure of the inner wall of the air collecting chamber 72. When the rotating block 73 rotates rapidly, a negative pressure will be formed inside the air collecting chamber 72, so that suction will be generated 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, and then enter the first chamber 611 through the ventilation groove 32 on the rotor 3. The gas entering the first chamber 611 enters the air collecting chamber 72 through the air inlet 77, and then the rotating block 73 drives the sliding leaf 75 to rotate, allowing the gas to enter the second chamber 612 through the exhaust port 78 on the fixed block 71, and finally be discharged from the motor through the exhaust hole 62 on the rear end cover 6, and the cycle is repeated in sequence to effectively cool the inside of the motor.

[0037] To sum up, through the setting of the transmission component 7, when the motor is started, the rotating shaft 1 will drive the rotating block 73 and the sliding leaf 75 to rotate in the air collecting chamber 72, which will form a negative pressure inside the air collecting chamber 72, so that suction is generated inside the motor, allowing the gas to enter the motor through the connecting hole 51 and the air inlet 41 to cool the stator 2, and then enter the air collecting chamber 72 through the air inlet 77, and then drive the rotation of the sliding leaf 75 through the rotating block 73 to allow the gas to be discharged from the motor through the exhaust port 78 and the exhaust hole 62, and the cycle is repeated in sequence to effectively cool the inside of the motor, so that the rotor 3 can run stably in the axial flux motor, thereby improving the performance and working efficiency of the motor.

[0038] Embodiment 2

[0039] Usually, permanent magnets are glued to the rotor. The permanent magnets facing each other will generate a gravitational force of opposite polarity that attracts each other. If this gravitational force continues to act, the permanent magnets may be separated from the carrier due to this force. The detached permanent magnets may be thrown out under the action of centrifugal force and hit the stator winding or end insulation, causing winding short circuit, insulation damage, and even local discharge or arc erosion, reducing 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, the two rotors 3 are respectively located at the two ends of the stator 2, and the center of each rotor 3 is fixedly connected to the outer wall of the rotating shaft 1, and the side of each rotor 3 close to the stator 2 is fixedly connected with permanent magnets 31 distributed equidistantly in a circle, and both end surfaces of each permanent magnet 31 are inclined surfaces. A fixing pin 33 is arranged between every two permanent magnets 31, and one end of the fixing pin 33 away from the stator 2 is fixedly connected to the rotor 3, and both end surfaces of each fixing pin 33 are inclined surfaces, and the inclined surface of the fixing pin 33 fits with the inclined surface of the permanent magnet 31, and the material of the fixing pin 33 is non-magnetic.

[0041] In actual use, since the two rotors 3 are respectively located at the two ends of the stator 2, the permanent magnet 31 has an N pole and an S pole, and the N pole and the S pole are alternately formed into a ring and installed on the rotor 3, the permanent magnets 31 of the two rotors 3 are arranged face to face, wherein the contact surfaces of the permanent magnet 31 and the fixing pin 33 that contact each other have a contour angle, so that the contact surfaces of the fixing pin 33 and the permanent magnet 31 form an inclined surface, and the side portion of the permanent magnet 31 is pressurized 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, thereby effectively preventing the permanent magnet 31 from detaching.

[0042] To sum up, through the setting of the fixing pin 33, the contact surface between the fixing pin 33 and the permanent magnet 31 is an inclined surface, and the side portion of the permanent magnet 31 is pressurized 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, thereby effectively preventing the permanent magnet 31 from detaching, thereby improving the safety and working efficiency of the motor.

[0043] Finally: 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 in the protection scope of the present invention.

Claims

1. A wear-resistant motor, comprising a rotating shaft, a stator, two symmetrically arranged rotors, a housing, a front cover and a rear cover, characterized in that: A transmission assembly is provided between the rotor near the rear end cover and the rear end cover; The transmission assembly includes a fixed block which is sealingly and rotatably connected to the outer wall of the rotating shaft, a gas collecting chamber is provided in the fixed block, the gas collecting chamber is eccentrically arranged, a rotating block is rotatably connected inside the gas collecting chamber, the rotating block is fixedly connected to the rotating shaft, a plurality of sliding grooves which are equidistantly distributed around the circumference are provided in the rotating block, each of the sliding grooves is slidably connected to a sliding leaf, and an elastic member is connected between each sliding leaf and the corresponding sliding groove.

2. A wear-resistant motor according to claim 1, characterized in that: A partition is fixedly connected inside the rear end cover, and the other end of the partition is fixedly connected to the fixed block. A first chamber is formed between the partition and the front end cover, and a second chamber is formed between the partition and the rear end cover.

3. A wear-resistant motor according to claim 2, characterized in that: An air inlet and an air outlet are formed on the outer wall of the fixing block. The first chamber is connected to the air collecting chamber through the air inlet, and the second chamber is connected to the air collecting chamber through the air outlet.

4. The wear-resistant motor according to claim 3, characterized in that: A plurality of communication holes equidistantly distributed in a circumference are provided on the outer side of the front end cover, and the gas enters the interior of the front end cover through the communication holes.

5. The wear-resistant motor according to claim 4, characterized in that: The front end cover is fixedly connected to the rear end cover through the shell. The outer wall of the shell is provided with a plurality of air inlet holes which are equidistantly distributed in a circumference. Gas can enter the interior of the shell through the air inlet holes to cool the stator.

6. The wear-resistant motor according to claim 5, characterized in that: Each of the rotors is provided with a plurality of evenly distributed ventilation grooves, and the gas entering the front end cover and the gas entering the outer shell can enter the first chamber through the ventilation grooves, and the gas entering the first chamber can enter the gas collecting chamber through the air inlet.

7. The wear-resistant motor according to claim 6, characterized in that: 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 leaf, the gas entering from the air inlet is discharged into the second chamber through the exhaust port.

8. The wear-resistant motor according to claim 7, characterized in that: The outer wall of the rear end cover is provided with a plurality of exhaust holes which are equidistantly distributed in a circumference, and the gas entering the second chamber can be discharged from the interior of the motor through the exhaust holes.

9. The wear-resistant motor according to claim 8, characterized in that: The two rotors are respectively located at the two ends of the stator, and the center of each rotor is fixedly connected to the outer wall of the rotating shaft. The side of each rotor close to the stator is fixedly connected to permanent magnets distributed equidistantly around the circumference, and both end surfaces of each permanent magnet are inclined surfaces. A fixing pin is arranged between every two permanent magnets, and one end of the fixing pin away from the stator is fixedly connected to the rotor, and both end surfaces of each fixing pin are inclined surfaces, and the inclined surfaces of the fixing pin and the inclined surfaces of the permanent magnet are in contact with each other.

10. The wear-resistant motor according to claim 9, characterized in that: The outer wall of the stator is fixedly connected to the inner wall of the shell, and a plurality of windings equidistantly distributed around the circumference are arranged in the stator.

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