Axial magnetic flux permanent magnet electric roller

Abstract

The invention discloses an axial magnetic flux permanent magnet electric roller, and belongs to the technical field of permanent magnet electric rollers, the axial magnetic flux permanent magnet electric roller comprises a first shaft, two second shafts are arranged on the two sides of the first shaft, the first shaft is fixedly connected with the two second shafts through fixing rods, gaps are arranged between the first shaft and the second shafts, and the first shaft is fixedly connected with the two second shafts through fixing rods. An adjustable torque mechanism is arranged in the gap between the first shaft and the second shaft and used for improving the output torque efficiency, and meanwhile a transverse magnetic flux mechanism is arranged in the middle of the first shaft and used for enhancing magnetic field distribution and improving the power density of the permanent magnet electric roller. By adopting the adjustable torque mechanism and the transverse magnetic flux mechanism, mechanical and stepless adjustment of output torque is realized, so that one roller can adapt to different load and rotating speed requirements, and on the premise of providing the same volume, higher torque power can be obtained, the power density of the permanent magnet electric roller is improved, and the volume and the weight are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of permanent magnet electric roller, and particularly relates to an axial flux permanent magnet electric roller. BACKGROUND

[0002] The permanent magnet electric roller is a kind of electric roller equipment taking permanent magnet material as the main working component, which is widely applied to conveying equipment and automatic production lines. The permanent magnet electric roller can directly utilize the magnetic field generated by the permanent magnet, saves the loss of the speed reducer, can significantly reduce the energy consumption while improving the efficiency, and can be applied to more complex scenes, such as the automatic production lines in the food, pharmaceutical, logistics and other industries. The diversified application makes the market demand of the permanent magnet electric roller grow continuously, which can meet the needs of different customers in different environments. Compared with the traditional electric roller, the permanent magnet electric roller has simple structure, reduced moving parts, reduced failure rate, reduced maintenance cost and downtime, and improved production efficiency.

[0003] The existing permanent magnet roller adopts the magnetic circuit structure of the ordinary radial flux permanent magnet motor, has the problems of low power density, large volume, inconvenient installation and the like, and limits the application of the permanent magnet roller in the space compact equipment. Moreover, the torque-speed characteristic of the traditional motor is fixed. When heavy load starting is needed (such as full load starting of the conveyor), an oversized motor may be needed, and when light load high-speed operation is needed, the motor may be in the low efficiency area, causing energy waste. A set of mechanical device is difficult to meet the two requirements of "low speed and large torque" and "high speed and constant power". SUMMARY

[0004] The application aims to overcome the defects of the prior art, and provides an axial flux permanent magnet electric roller.

[0005] The technical scheme adopted to solve the above technical problems is as follows: an axial flux permanent magnet electric roller, comprising a first shaft, two second shafts arranged on the two sides of the first shaft, and a fixed rod fixedly connected between the first shaft and the two second shafts. A gap is arranged between the first shaft and the two second shafts, and an adjustable torque mechanism is arranged in the gap between the first shaft and the two second shafts, for improving the output torque efficiency. A transverse flux mechanism is arranged in the middle of the first shaft, for enhancing the magnetic field distribution and improving the power density of the permanent magnet electric roller.

[0006] Through the above technical scheme, the roller can be adjusted according to different application requirements and load conditions, adapt to different working environments and use scenarios, the exciting current and magnetic field distribution can be optimized by adjusting the diameter of the coil group, so as to improve the overall efficiency, the larger coil diameter can generate a stronger magnetic field, and the output power and working stability are improved.

[0007] Further, the adjustable torque mechanism includes two groups of two fixed blocks arranged in mirror symmetry, and the two fixed blocks in a single group are arranged in mirror symmetry, and the two fixed blocks in a single group are fixedly connected with the first shaft and the second shaft, respectively, a triangular-shaped sliding groove is formed on one side of the fixed block, and the fixed rod is fixedly connected with the sliding groove, and a stator frame is arranged in the sliding groove, the stator frame is slidably connected with the fixed block, and the bottom of the stator frame is arranged in an inclined manner, and three moving plates are arranged in a linear and equidistant manner between the three stator frames.

[0008] Through the above technical scheme, the operation balance of the electric roller can be improved, the vibration and noise can be reduced, and the electric roller can work more stably and quietly. Good balance helps to improve the service life and reliability of the equipment.

[0009] Further, the sizes of the three moving plates are arranged in an equilateral progression, and the three moving plates are fixedly connected through two connecting rods, and a limiting groove is formed on the outer part of the moving plate away from the connecting rod, the inclined end of the bottom of the stator frame is located in the limiting groove, and the stator frame is slidably connected with the three moving plates, and the three moving plates limit the stator frame, so that the three moving plates move horizontally and linearly to push the stator frame to move vertically along the sliding groove, thereby adjusting the diameter formed between the three stator frames.

[0010] Through the above technical scheme, the coil group of different diameters can be designed according to the requirements, the mechanical strength of the rotor is enhanced, the rotor is more reliable when bearing high load, and the risk of failure is reduced.

[0011] Further, a gap is arranged at the connection between the second shaft and the fixed block, and three spring rods arranged in circumferential symmetry are arranged in the gap between the second shaft and the fixed block, and the spring rods are rotatably connected with the fixed block, a secondary pulley is rotatably connected to the extension end of the spring rod, and a primary pulley rotatably connected with the fixed block is arranged between the three secondary pulleys, a red copper wire is wound in series between the three stator frames in a single group, and the red copper wire passes through the linkage structure formed by the secondary pulley and the primary pulley, and the end of the red copper wire away from the stator frame is slidably connected with the primary pulley, and the tension of the red copper wire is adjusted through the extension and retraction of the spring rod, so as to realize dynamic adjustment of torque output in cooperation with the radial displacement of the stator frame.

[0012] Through the above technical scheme, the spring rod and the pulley system act as an "intelligent cable manager", which compensates for displacement in real time, protects the delicate red copper wire, and eliminates the risk of internal damage caused by adjustment action.

[0013] Further, the gap between the second shaft and the fixed block is provided with a conductor block, and the conductor block is embedded with a rubber sleeve arranged in an H-shaped structure, and the conductor block and the rubber sleeve are fixedly connected with the second shaft, the copper wire penetrates and is slidably connected with the rubber sleeve, and then is fixedly connected with the conductor block, and the second shaft is provided with a lead wire, and one end of the lead wire is slidably connected with the rubber sleeve and is electrically connected with the conductor block, so that the copper wire on the stator frame is electrified through the lead wire and the conductor block, so as to generate an electromagnetic driving force, and the middle part of the first shaft is rotatably connected with a double-thread rod, and the two ends of the double-thread rod are threadedly connected with the two groups of moving plates, and the two penetrating ends of the double-thread rod are rotatably connected with the fixed block and the main pulley.

[0014] Through the above technical scheme, when a large torque is needed, the knob is rotated to drive the double-thread rod to move the moving plate, and the stator frame is pushed along the sliding groove to the outside to increase the effective diameter of the stator winding. Under the condition that the current remains unchanged, the output torque increases significantly, and heavy load starting conditions are easily handled.

[0015] Further, one penetrating end of the double-thread rod is rotatably connected with one of the second shafts, and the other penetrating end of the double-thread rod is rotatably connected with the other second shaft, and the penetrating end of the double-thread rod located outside the second shaft is provided with a knob, and the double-thread rod is driven to rotate by the connecting rod, and the two groups of moving plates are driven to move linearly in opposite directions, so as to control the change of the equivalent diameter formed by the two groups of stator frames arranged in mirror image, and realize the adjustment of the output torque. The water inlet pipe and the water outlet pipe are installed inside the second shaft located on one side of the connecting rod, and the water inlet pipe and the water outlet pipe are connected, and the ends of the water inlet pipe and the water outlet pipe away from the connecting rod are fixedly connected with the first shaft and the fixed block. The connection between the water inlet pipe and the water outlet pipe is located in the gap between the second shaft and the fixed block.

[0016] Through the above technical scheme, the integrated water cooling system directly cools the heat source, effectively controls the operating temperature, not only guarantees the service life of the insulation system, but also prevents the demagnetization of the permanent magnet due to high temperature, and ensures the long-term stability of the drum magnetic field.

[0017] Further, the transverse flux mechanism comprises a permanent magnet support, and the permanent magnet support is internally provided with an outer ring positioning magnetic separation ring, and the inner wall of the outer ring positioning magnetic separation ring is provided with a plurality of circumferentially symmetrically distributed magnetic separation strips through installation, and the ends of the plurality of magnetic separation strips away from the outer ring positioning magnetic separation ring are provided with an inner ring positioning magnetic separation ring, and the gap between the outer ring positioning magnetic separation ring, the magnetic separation strips and the inner ring positioning magnetic separation ring is provided with a fan-shaped permanent magnet, and the inner ring positioning magnetic separation ring is rotatably connected with the first shaft on the side away from the magnetic separation strips.

[0018] Through the technical scheme, the air gap magnetic field between the fan-shaped permanent magnet and the red copper wire is in sinusoidal distribution, effectively reducing harmonic loss and improving the efficiency of the roller operation, and since the magnetic separation strips are symmetrically distributed, the magnetic field is uniformly conducted in the rotor, avoiding local magnetic saturation and further enhancing the stability of the magnetic circuit.

[0019] Further, the permanent magnet support is provided with connecting rings on both sides, two connecting rings are fixedly connected with the outer cylinder of the roller, and the outer cylinder of the roller is provided with roller end covers at both ends, the roller end covers are respectively provided with bearing inner covers and bearing outer covers on both sides of the middle part, the bearing inner cover and the bearing outer cover are fixedly connected with the bearing, the bearing is fixedly connected with the second shaft, and the second shaft away from the bearing on both sides of the first shaft is fixedly connected with the support seat.

[0020] Through the technical scheme, the accurate axial positioning of the outer ring positioning magnetic separation ring and the inner ring positioning magnetic separation ring effectively suppresses the centrifugal force disturbance of the permanent magnet under high-speed rotation, ensures the stability of the air gap magnetic field, improves the operation stability in combination with the optimized arrangement of the fan-shaped permanent magnet, and further, the red copper wire is wound in parallel by using a plurality of twisted insulated wires, thereby reducing the skin effect.

[0021] The beneficial effects of the present application are as follows: (1) the present application drives the double-thread rod to rotate by rotating the knob, the rotation of the double-thread rod drives the moving plates on both sides of the first shaft to move towards or away from each other through thread transmission, thereby making the inclined end at the bottom of the stator frame slide in the limiting groove of the three equal ratio moving plates, pushing the stator frame to displace radially along the sliding groove of the fixed block, and changing the diameter of the stator formed by the three stator frames and the red copper wire, thereby directly lengthening the force arm and greatly widening the effective working range of the motor, realizing self-adaptation to the working condition, avoiding the problem of overlarge or undersized motor selection, and improving the overall energy efficiency and adaptability of the system; (2) the rotor composed of the permanent magnet support, the fan-shaped permanent magnet, the outer ring positioning magnetic separation ring, the inner ring positioning magnetic separation ring and the magnetic separation strip, the magnetic force line direction is parallel to the shaft, the permanent magnets on both sides of the rotor are simultaneously subjected to the electromagnetic force of the two stators, the magnetic pull is balanced, the negative influence of single-sided magnetic pull on the bearing is eliminated, and the output torque is doubled, thereby realizing extremely high power density and compact structure. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the first perspective structural schematic diagram of the present application; Figure 2 is the second perspective structural schematic diagram of the present application; Figure 3 is the internal structural schematic diagram of the outer cylinder of the roller of the present application; Figure 4 is the structural schematic diagram of the connection between the first shaft and the water inlet pipe of the present application; Figure 5 is an enlarged structural schematic view of A of Figure 4 Figure 6 is a partial structural schematic view of a stator frame of the present application; Figure 7 is an enlarged structural schematic view of B of Figure 6 Figure 8 is an enlarged structural schematic view of C of Figure 6 Figure 9 is a structural schematic view of a connection between a moving plate and a stator frame of the present application; Figure 10 is a structural schematic view of a connection between a No. 1 shaft and a fixed block of the present application; Figure 11 is an enlarged structural schematic view of D of Figure 10 Figure 12 is a structural schematic view of a connection between a bearing inner cover and a drum end cover of the present application; Figure 13 is a structural schematic view of a connection between a sector-shaped permanent magnet and a magnetic separation strip of the present application; Figure 14 is a structural schematic view of a connection between a bearing and a bearing outer cover of the present application.

[0023] Reference signs: 11, No. 1 shaft; 12, fixed rod; 13, water inlet pipe; 14, water outlet pipe; 15, No. 2 shaft; 16, red copper wire; 17, wire; 18, conductor block; 19, rubber sleeve; 20, permanent magnet support; 21, fixed block; 22, sliding groove; 23, moving plate; 24, limiting groove; 25, stator frame; 26, double-threaded rod; 27, spring rod; 28, auxiliary pulley; 29, main pulley; 30, connecting rod; 31, sector-shaped permanent magnet; 32, magnetic separation strip; 33, outer ring positioning magnetic separation ring; 34, inner ring positioning magnetic separation ring; 35, bearing; 36, bearing outer cover; 37, bearing inner cover; 38, connecting ring; 39, drum end cover; 40, support seat; 41, drum outer cylinder; 42, knob. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0025] As Figures 1-8 ​​​​The axial magnetic flux permanent magnet electric roller of the embodiment comprises a first shaft 11, two second shafts 15 are arranged on both sides of the first shaft 11, the first shaft 11 and the two second shafts 15 are fixedly connected through a fixed rod 12, a gap is arranged between the first shaft 11 and the second shaft 15, and an adjustable torque mechanism is arranged in the gap between the first shaft 11 and the second shaft 15, which is used for improving the output torque efficiency. The adjustable torque mechanism comprises two groups of two fixed blocks 21 arranged in mirror symmetry, the two fixed blocks 21 in a single group are arranged in mirror symmetry, the two fixed blocks 21 in a single group are fixedly connected with the first shaft 11 and the second shaft 15 respectively, so that the roller can be adjusted according to different application requirements and load conditions, adapt to different working environments and use scenarios, the diameter of the coil group is adjusted, the excitation current and the magnetic field distribution are optimized, and the overall efficiency is improved. A larger coil diameter can generate a stronger magnetic field, improve the output power and working stability, a sliding groove 22 in a triangular shape is arranged on one side of the fixed block 21, the fixed rod 12 is fixedly connected with the sliding groove 22 in penetration, a stator frame 25 is arranged in the sliding groove 22, a conductor block 18 is arranged in the gap at the connection position of the second shaft 15 and the fixed block 21, a rubber sleeve 19 in an H-shaped structure is embedded in the conductor block 18, and the conductor block 18 and the rubber sleeve 19 are fixedly connected with the second shaft 15 in penetration.

[0026] As Figures 1-11 The through sliding connection of the through end of the red copper wire 16 with the rubber sleeve 19 and the fixed connection of the red copper wire 16 with the conductor block 18 are completed, the lead wire 17 is arranged in the second shaft 15, one end of the lead wire 17 is fixedly connected with the rubber sleeve 19 in penetration and electrically connected with the conductor block 18, the red copper wire 16 on the stator frame 25 is energized through the lead wire 17 and the conductor block 18, so as to generate an electromagnetic driving force, the double-threaded rod 26 is rotatably connected in the middle of the first shaft 11, one through end of the double-threaded rod 26 is rotatably connected with one of the second shafts 15, and the other through end of the double-threaded rod 26 is rotatably connected with the other second shaft 15, which can help to improve the running balance of the electric roller, reduce vibration and noise, and make the electric roller more stable and quiet in work. Good balance helps to improve the service life and reliability of the equipment, the through end of the double-threaded rod 26 located outside the second shaft 15 is provided with a knob 42, a rotary driving force is applied to the double-threaded rod 26 through the connecting rod 30, two groups of moving plates 23 are driven to move linearly in opposite directions synchronously, so as to control the change of the equivalent diameter of the two groups of stator frames 25 arranged in mirror image, realize the adjustment of the output torque, the water inlet pipe 13 and the water outlet pipe 14 are arranged inside the second shaft 15 on one side of the connecting rod 30 and are communicated, and the integrated water cooling system directly cools the heat source, effectively controls the operating temperature, not only guarantees the service life of the insulation system, but also prevents the demagnetization of the permanent magnet due to high temperature, and ensures the long-term stability of the roller magnetic field.

[0027] As Figures 1-12 At the same time, the water inlet pipe 13 and the water outlet pipe 14 are fixedly connected with the first shaft 11 and the fixed block 21 at one end of the connecting rod 30, the connection part of the water inlet pipe 13 and the water outlet pipe 14 is located in the gap between the second shaft 15 and the fixed block 21, and the two ends of the double-thread rod 26 are threadedly connected with the two groups of moving plates 23, and the two penetrating ends of the double-thread rod 26 are rotatably connected with the fixed block 21 and the main pulley 29. Different diameter coil groups can be designed according to requirements, the mechanical strength of the rotor is enhanced, the rotor is more reliable when bearing high load, the failure risk is reduced, the stator frame 25 is slidably connected with the fixed block 21, the gap is arranged between the second shaft 15 and the fixed block 21, and three spring rods 27 are arranged in the gap between the second shaft 15 and the fixed block 21 and are arranged in a circumferential symmetry. When a large torque is needed, the knob 42 is rotated to drive the double-thread rod 26 to move the moving plate 23, the stator frame 25 is pushed along the sliding groove 22 to the outside, the acting diameter of the stator winding is increased, the output torque is significantly increased under the condition that the current is unchanged, and the heavy load starting condition is easily coped with. At the same time, the spring rod 27 is rotatably connected with the fixed block 21, the extension end of the spring rod 27 is rotatably connected with the auxiliary pulley 28, and the main pulley 29 rotatably connected with the fixed block 21 is arranged between the three auxiliary pulleys 28.

[0028] As Figures 1-13 As shown in the figure, the three stator frames 25 in the single group are serially wound with red copper wires 16, and the red copper wires 16 pass through the linkage structure formed by the auxiliary pulley 28 and the main pulley 29. At the same time, the end of the red copper wire 16 away from the stator frame 25 is slidably connected with the main pulley 29, and the tension of the red copper wire 16 is adjusted through the extension and retraction of the spring rod 27, so as to realize the dynamic adjustment of the torque output in cooperation with the radial displacement of the stator frame 25. The bottom of the stator frame 25 is arranged in an inclined manner, three moving plates 23 are arranged in a linear and equidistant manner between the three stator frames 25, the size between the three moving plates 23 is arranged in an equal ratio, and the three moving plates 23 are fixedly connected through the two connecting rods 30. The spring rod 27 and the pulley system are like an "intelligent cable manager", which can compensate displacement in real time, protect the delicate red copper wire 16, and eliminate the risk of internal damage caused by adjustment action. At the same time, the limit groove 24 is opened outside the moving plate 23 away from the connecting rod 30, the inclined end of the bottom of the stator frame 25 is located in the limit groove 24, and the stator frame 25 is slidably connected with the three moving plates 23. At the same time, the three moving plates 23 limit the stator frame 25, so that the three moving plates 23 move horizontally to push the stator frame 25 to move vertically along the sliding groove 22, so as to adjust the diameter formed between the three stator frames 25.

[0029] As Figures 1-14Meanwhile, the middle part of the first shaft 11 is provided with a transverse flux mechanism for enhancing the magnetic field distribution and improving the power density of the permanent magnet motor roller, the transverse flux mechanism comprises a permanent magnet support 20, the two sides of the permanent magnet support 20 are provided with connecting rings 38, two connecting rings 38 are fixedly connected, a roller outer cylinder 41 is fixedly connected between the two connecting rings 38, roller end covers 39 are arranged at the two ends of the roller outer cylinder 41, bearing inner covers 37 and bearing outer covers 36 are arranged at the two sides of the middle part of the roller end covers 39, bearings 35 are fixedly arranged between the bearing inner covers 37 and the bearing outer covers 36, the bearings 35 are fixedly penetrated by the second shaft 15, support seats 40 are fixedly arranged on the side, away from the bearings 35, of the second shaft 15 located at the two sides of the first shaft 11, outer ring positioning magnetic separation rings 33 are arranged in the permanent magnet support 20, a plurality of circumferentially and symmetrically distributed magnetic separation strips 32 are arranged on the inner wall of the outer ring positioning magnetic separation ring 33, the air gap magnetic field between the fan-shaped permanent magnets 31 and the copper wire 16 is in sinusoidal distribution, the harmonic loss is effectively reduced, and the roller operation efficiency is improved, because the magnetic separation strips 32 are symmetrically distributed, the magnetic field is uniformly conducted in the rotor, local magnetic saturation is avoided, the magnetic circuit stability is further enhanced, inner ring positioning magnetic separation rings 34 are arranged between a plurality of magnetic separation strips 32 away from one end of the outer ring positioning magnetic separation ring 33, gaps are formed between the outer ring positioning magnetic separation ring 33, the magnetic separation strips 32 and the inner ring positioning magnetic separation ring 34, the fan-shaped permanent magnets 31 are arranged in the gaps, the inner ring positioning magnetic separation ring 34 is rotationally connected to the first shaft 11 on the side, away from the magnetic separation strips 32, of the inner ring positioning magnetic separation ring 34, the accurate axial positioning of the outer ring positioning magnetic separation ring 33 and the inner ring positioning magnetic separation ring 34 effectively suppresses the centrifugal force disturbance of the permanent magnet under high-speed rotation, ensures the stability of the air gap magnetic field, and improves the operation stability in combination with the optimized arrangement of the fan-shaped permanent magnets 31, in addition, the copper wire 16 is wound in parallel by using a plurality of twisted insulated wires, and the skin effect influence is reduced.

[0030] The working principle of the embodiment is as follows: the whole device is installed on the belt conveyor through the support seat 40, the belt is sleeved on the roller outer cylinder 41, the wires 17 of the two second shafts 15 are connected in series, and then connected to an external driving power supply, and then energized, the current enters the copper wire 16 again after the wire 17, and an electromagnetic field is formed around the stator composed of the stator frame 25 and the copper wire 16, the magnetic field generated along the axis direction penetrates the rotor composed of the permanent magnet support 20, the fan-shaped permanent magnet 31, the outer ring positioning magnetic separation ring 33, the inner ring positioning magnetic separation ring 34 and the magnetic separation strip 32, according to the Lorentz law, the magnetic field generates torque in the rotor, and the size of the generated torque is proportional to the current at the current moment, so as to drive the rotor to rotate.

[0031] When the torque output needs to be adjusted to meet the heavy load starting, the worker can rotate the knob 42 to drive the double-thread rod 26 to rotate, the rotation of the double-thread rod 26 drives the several moving plates 23 on both sides of the first shaft 11 to move towards or away from each other through threaded transmission, and then the inclined end at the bottom of the stator frame 25 slides in the three equi-ratio moving plates 23 The limit groove 24, thereby pushing the stator frame 25 to displace radially along the sliding groove 22 of the fixed block 21, and then changing the diameter of the stator formed by the three stator frames 25 and the red copper wire 16, and directly lengthening the moment arm by increasing the diameter, so that the magnetic cylinder can output several times the torque of the small diameter design under the condition that the current (electromagnetic force) is unchanged, thereby significantly improving the starting torque of the driving roller and adapting to the smooth starting demand under the heavy load working condition. At the same time, the structure realizes stepless adjustment of the stator diameter through mechanical adjustment, ensures that the uniformity of the magnetic field distribution is not affected, and maintains the electromagnetic conversion efficiency.

[0032] When the stator frame 25 moves, the red copper wire 16 moves synchronously, since the red copper wire 16 is wound and connected with the auxiliary pulley 28 and the main pulley 29, the movement of the red copper wire 16 drives the auxiliary pulley 28 and the main pulley 29 to rotate synchronously, at the same time, the spring rod 27 and the fixed block 21 produce relative rotation while being stretched and contracted to different degrees, so that the tension change of the red copper wire 16 during movement is compensated by the spring rod 27 in real time, and the red copper wire 16 always maintains constant tension during dynamic adjustment, avoiding the risk of electromagnetic field distortion or short circuit caused by loosening.

[0033] When the rotor rotates, the connecting ring 38 is directly driven to rotate, and then the outer cylinder 41 of the roller and the roller end cover 39 are synchronously rotated in the bearing 35, so as to drive the belt to run and realize continuous conveying of materials, at this time, the first shaft 11 remains stationary and only serves as a magnetic field passage and structural support, while the outer cylinder 41 of the roller rotates synchronously with the rotor, forming an "outer rotor" type permanent magnet driving structure, which effectively improves the torque output capacity.

[0034] And the water inlet and outlet of the water inlet pipe 13 and the water outlet pipe 14 on one side of the second shaft 15 are connected to the external circulating cooling system, so that the joule heat generated during the operation of the stator is continuously taken away by the water flow, effectively inhibiting the temperature rise and ensuring the long-term stable operation of the stator under high load working condition. At the same time, after the cooling water flows through the water inlet pipe 13 into the second shaft 15, it is evenly distributed to the heat dissipation cavities in each stator frame 25 along the axial channel, and then is discharged through the water outlet pipe 14, realizing omnidirectional and efficient cooling of the red copper wire 16 and the conductor block 18.

[0035] The above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application.

Claims

1. An axial flux permanent magnet electric roller, comprising a first shaft (11), and two second shafts (15) arranged on both sides of the first shaft (11), wherein the first shaft (11) and the two second shafts (15) are fixedly connected by a fixing rod (12), characterized in that: A gap is provided between the first shaft (11) and the second shaft (15), and an adjustable torque mechanism is provided in the gap between the first shaft (11) and the second shaft (15) to improve the output torque efficiency. At the same time, a transverse magnetic flux mechanism is provided in the middle of the first shaft (11) to enhance the magnetic field distribution and improve the power density of the permanent magnet electric roller.

2. The axial flux permanent magnet electric drum according to claim 1, characterized in that, The adjustable torque mechanism includes two sets of two fixed blocks (21) arranged in a mirror symmetry. The two fixed blocks (21) in a single set are arranged in a mirror symmetry. The two fixed blocks (21) in a single set are fixedly connected to the first shaft (11) and the second shaft (15) respectively. A triangular sliding groove (22) is opened on one side of the fixed block (21). The fixed rod (12) is fixedly connected to the sliding groove (22) through it. A stator frame (25) is provided in the sliding groove (22). The stator frame (25) is slidably connected to the fixed block (21). The bottom of the stator frame (25) is inclined. Three moving plates (23) are arranged linearly and equidistantly between the three stator frames (25).

3. The axial flux permanent magnet electric drum according to claim 2, characterized in that, The dimensions of the three movable plates (23) are set in a proportional increment, and the three movable plates (23) are fixedly connected through two connecting rods (30). At the same time, a limiting groove (24) is opened on the outside of the movable plates (23) away from the connecting rods (30). The inclined end of the bottom of the stator frame (25) is located in the limiting groove (24), and the stator frame (25) is slidably connected to the three movable plates (23). At the same time, the three movable plates (23) limit the stator frame (25), so that the three movable plates (23) move laterally linearly and push the stator frame (25) to move vertically along the slide groove (22), thereby adjusting the diameter formed between the three stator frames (25).

4. An axial flux permanent magnet electric drum according to claim 2, characterized in that, A gap is provided at the connection between the second shaft (15) and the fixed block (21), and three spring rods (27) arranged symmetrically in a circle are provided in the gap between the second shaft (15) and the fixed block (21). At the same time, the spring rods (27) are rotatably connected to the fixed block (21). The extension end of the spring rods (27) is rotatably connected to the auxiliary pulleys (28), and a main pulley (29) rotatably connected to the fixed block (21) is provided between the three auxiliary pulleys (28). Copper wires (16) are wound in series between the three stator frames (25) in a single group, and the copper wires (16) pass through the linkage structure formed by the auxiliary pulleys (28) and the main pulleys (29). At the same time, the end of the copper wires (16) away from the stator frame (25) is slidably connected to the main pulley (29). The tension of the copper wires (16) is adjusted by the extension and retraction of the spring rods (27), thereby cooperating with the radial displacement of the stator frame (25) to realize the dynamic adjustment of torque output.

5. An axial flux permanent magnet electric roller according to claim 4, characterized in that, A conductor block (18) is provided in the gap between the second shaft (15) and the fixed block (21), and a rubber sleeve (19) with an H-shaped structure is embedded in the conductor block (18). The conductor block (18) and the rubber sleeve (19) are fixedly connected to the second shaft (15). The copper wire (16) is slidably connected to the rubber sleeve (19) and then fixedly connected to the conductor block (18). A wire (17) is threaded through the second shaft (15), and one end of the wire (17) is connected to the rubber sleeve (18). 19) After the sliding connection, it is electrically connected to the conductor block (18). The copper wire (16) on the stator frame (25) is energized through the conductor block (18) and the conductor (17) to generate electromagnetic driving force. The first shaft (11) is rotatably connected to a double threaded rod (26) in the middle. The two ends of the double threaded rod (26) are threadedly connected to the two sets of moving plates (23). At the same time, the two through ends of the double threaded rod (26) are rotatably connected to the fixed block (21) and the main pulley (29).

6. An axial flux permanent magnet electric drum according to claim 5, characterized in that, One end of the double threaded rod (26) is rotatably connected to one of the No. 2 shafts (15), and the other end of the double threaded rod (26) is rotatably connected to the other No. 2 shaft (15). A knob (42) is installed at the end of the double threaded rod (26) outside the No. 2 shaft (15). A rotational driving force is applied to the double threaded rod (26) through the connecting rod (30), which drives the two sets of moving plates (23) to move synchronously and linearly in opposite directions, thereby controlling the equivalent formation of the two sets of stator frames (25) set in a mirror image. The diameter changes to adjust the output torque. The No. 2 shaft (15) located on one side of the connecting rod (30) is equipped with an inlet pipe (13) and an outlet pipe (14). The inlet pipe (13) and the outlet pipe (14) are connected. At the same time, the end of the inlet pipe (13) and the outlet pipe (14) away from the connecting rod (30) is fixedly connected to the No. 1 shaft (11) and the fixing block (21). The connection between the inlet pipe (13) and the outlet pipe (14) is located in the gap between the No. 2 shaft (15) and the fixing block (21).

7. An axial flux permanent magnet electric drum according to claim 5, characterized in that, The transverse magnetic flux mechanism includes a permanent magnet support (20), and an outer ring positioning magnetic isolation ring (33) is installed inside the permanent magnet support (20). At the same time, a number of magnetic isolation strips (32) are installed on the inner wall of the outer ring positioning magnetic isolation ring (33) in a circumferentially symmetrical arrangement. An inner ring positioning magnetic isolation ring (34) is installed between the ends of the magnetic isolation strips (32) away from the outer ring positioning magnetic isolation ring (33). A fan-shaped permanent magnet (31) is installed in the gap formed between the outer ring positioning magnetic isolation ring (33), the magnetic isolation strips (32) and the inner ring positioning magnetic isolation ring (34). At the same time, the side of the inner ring positioning magnetic isolation ring (34) away from the magnetic isolation strips (32) is rotatably connected to the first shaft (11).

8. An axial flux permanent magnet electric drum according to claim 7, characterized in that, The permanent magnet bracket (20) is equipped with connecting rings (38) on both sides, and the outer cylinder of the roller (41) is fixedly connected between the two connecting rings (38). At the same time, the roller end caps (39) are installed at both ends of the outer cylinder of the roller (41). The inner bearing cover (37) and the outer bearing cover (36) are respectively installed on both sides of the middle of the roller end cap (39). The inner bearing cover (37) and the outer bearing cover (36) are fixedly installed between the inner bearing cover (37) and the outer bearing cover (36). The bearing (35) is fixedly installed through the second shaft (15). The second shaft (15) located on both sides of the first shaft (11) is fixedly installed with a support seat (40) on the side away from the bearing (35).

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