Storage battery driving motor and motor driving system

Abstract

The invention discloses a storage battery driving motor and a motor driving system, and relates to the technical field of driving motors, the storage battery driving motor comprises a motor body, and the motor body is provided with a rotating shaft matched with a belt wheel; an air cavity is formed in the rotating shaft, a first sliding groove is formed in the outer wall of the rotating shaft, an air hole is formed in the inner wall of the first sliding groove, the first sliding groove communicates with the air cavity through the air hole, a sliding block used for positioning a belt wheel in the radial direction is arranged in the first sliding groove in a sliding mode, and a first threaded rod is rotationally arranged on the rotating shaft. And sliding rings are arranged on the two sides of the air cavity in a sliding manner. According to the storage battery driving motor and the motor driving system, by arranging the sliding block, the first pressing plate, the second pressing plate and other structures, the storage battery driving motor and the motor driving system are suitable for belt wheels with different inner diameter sizes, radial positioning and axial positioning are conducted on the belt wheels at the same time, the effect of synchronous self-locking of radial positioning and axial positioning is achieved, and the applicability of the storage battery driving motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive motors, and in particular to a battery-driven motor and a motor drive system. Background Art

[0002] ‌Motor and electric machine are conceptually the same, both refer to devices that convert electrical energy into mechanical energy, but in practical applications, motor is a more formal term and motor is a more common name.

[0003] In the prior art, battery-driven motors are usually only applicable to pulleys, gears, etc. with a single inner diameter, and their efficiency needs to be improved.

[0004] Therefore, it is necessary to propose a battery driven motor and a motor driving system to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a battery-driven motor and a motor driving system to solve the problem in the prior art that battery-driven motors are usually only suitable for pulleys, gears, etc. with a single inner diameter size and their efficiency needs to be improved.

[0006] To achieve the above object, the present invention provides the following technical solution: a battery-driven motor, comprising a motor body, wherein the motor body is provided with a rotating shaft cooperating with a pulley; An air cavity is arranged inside the rotating shaft, a first slide groove is arranged on the outer wall of the rotating shaft, an air hole is arranged on the inner wall of the first slide groove, the first slide groove is communicated with the air cavity through the air hole, a slider for radially positioning the pulley is slidably arranged inside the first slide groove, a first threaded rod is rotatably arranged on the rotating shaft, slip rings are slidably arranged on both sides of the air cavity, the first threaded rod rotates, driving the two slip rings to move toward each other, the gas inside the air cavity enters the first slide groove through the air hole, pushing the slider to slide outward and abut against the inner ring of the pulley; A first pressing plate is arranged on the side of the pulley facing away from the motor body, and a second pressing plate is arranged on the side of the pulley close to the motor body. The first pressing plate and the second pressing plate move towards each other to position the pulley axially. When the first pressing plate abuts against the outer wall of the pulley, the first threaded rod is limited by the limiting assembly to prevent the first threaded rod from rotating in the opposite direction.

[0007] Preferably, the first sliding grooves are provided in plurality, and the plurality of first sliding grooves are evenly distributed around the rotating shaft.

[0008] Preferably, a key tooth matching the keyway of the pulley is fixedly connected to one of the sliders.

[0009] Preferably, circular grooves are provided at both ends of the air cavity, a second slide groove is provided on the outer wall of the rotating shaft, two second slide grooves are provided, and the two second slide grooves are respectively distributed on both sides of the air cavity, the second slide groove is connected to the air cavity through the corresponding circular groove, a threaded cylinder is slidably connected inside the circular groove, the threaded cylinder is fixedly connected to the corresponding slip ring, the threaded cylinder cooperates with the first threaded rod, wherein a first square plate is slidably provided in a second slide groove away from the motor body, the first square plate is fixedly connected to the corresponding threaded cylinder, the first square plate is provided with a square groove, a third party plate is slidably provided in the other second slide groove, and the third party plate is fixedly connected to the corresponding threaded cylinder.

[0010] Preferably, the threads at both ends of the first threaded rod are in opposite directions.

[0011] Preferably, the limit assembly comprises a second square plate, a second threaded rod, an outer groove, a U-shaped card, a slide plate, a slide cylinder, a spring, a vertical plate, an inner groove and a limit block, the second square plate is inserted into the interior of the square groove, the second threaded rod is threadedly connected to the second square plate, the first pressure plate is fixedly connected to the second threaded rod, the outer groove is opened at one end of the second threaded rod away from the first pressure plate, the U-shaped card is plugged into the outer groove, one end of the slide plate is fixedly connected to the U-shaped card, the other end of the slide plate is slidably connected to the interior of the slide cylinder, the spring is located inside the slide cylinder, one end of the spring is fixedly connected to the slide plate, the other end of the spring is fixedly connected to the inner wall of the slide cylinder, the vertical plate is fixedly connected to the outer wall of the slide cylinder, the vertical plate and the slide cylinder are distributed in an L shape, the inner groove is opened on the first threaded rod, the limit block is inserted into the interior of the inner groove, and the limit block is fixedly connected to the vertical plate.

[0012] Preferably, a third threaded rod is threadedly connected to the third plate, and the second pressing plate is fixedly connected to the third threaded rod.

[0013] Preferably, the first pressure plate is provided with a first through hole, the first through hole is arranged in a plurality and the plurality of first through holes are evenly distributed, the second pressure plate is provided with a second through hole, the second through hole is arranged in a plurality and the plurality of second through holes are evenly distributed, a first round rod is arranged on the outside of the rotating shaft, one end of the first round rod is inserted into one of the first through holes, the other end of the first round rod is inserted into the corresponding second through hole, and the second square plate is provided with a through groove for the first round rod to pass through.

[0014] Preferably, one end of the first round rod close to the second square plate is fixedly connected to a rotating rod, the second round rod is rotatably connected to the rotating rod, and a torsion spring is sleeved on the outside of the rotating rod.

[0015] The present invention also discloses a motor drive system, which is applied to the battery drive motor mentioned above and also includes: a battery, a control circuit and a power circuit.

[0016] Technical effects and advantages of the present invention: The present invention is suitable for pulleys with different inner diameters by arranging structures such as a slider, a first pressing plate and a second pressing plate, and simultaneously performs radial positioning and axial positioning on the pulley, and achieves the effect of synchronous self-locking of radial positioning and axial positioning, thereby improving the applicability of the battery-driven motor; The radial and axial positioning of the pulley are concentrated on the inner ring of the pulley, that is, the connection between the shaft and the pulley, which improves the stability of the connection without affecting the coordination between the pulley and the belt structure. The first pressing plate and the limiting assembly are arranged as movable structures, which does not affect the installation of the pulley into the outside of the rotating shaft; The structures such as the slip ring and the slider are provided, and the first threaded rod is rotated, which will not affect the driving motor compared with the prior art in which the pulley is installed by hammering; By setting the first round rod, the second round rod and other structures, the second pressure plate is positioned to improve the stability of the pulley positioning. At the same time, during the operation of the motor body, when the shaft drives the pulley to rotate at high speed, the first round rod and the second round rod will not be thrown out directly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the battery driven motor from one perspective of the present invention.

[0018] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle.

[0019] Figure 3 This is a schematic structural diagram of the battery-driven motor of the present invention from another perspective.

[0020] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B in the middle.

[0021] Figure 5 It is a schematic diagram of the slider and key tooth structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the circular groove and air cavity structure of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point C in the middle.

[0024] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point D in the middle.

[0025] Fig. 9 For the present invention Figure 6 Enlarged schematic diagram of the structure at point E in the middle.

[0026] Fig.10 It is a schematic diagram of the structure of the rotating shaft and the first sliding groove of the present invention.

[0027] In the figure: 1. motor body; 2. rotating shaft; 3. pulley; 4. first slide groove; 5. slider; 6. key tooth; 7. circular groove; 8. air cavity; 9. slip ring; 10. second slide groove; 11. first square plate; 12. threaded cylinder; 13. air hole; 14. first threaded rod; 15. square groove; 16. second square plate; 17. second threaded rod; 18. first pressure plate; 19. third party plate; 20. third threaded rod; 21. second pressure plate; 22. first through hole; 23. second through hole; 24. first round rod; 25. rotating rod; 26. second round rod; 27. through groove; 28. torsion spring; 29. ​​outer groove; 30. U-shaped card; 31. slide plate; 32. slide cylinder; 33. spring; 34. vertical plate; 35. inner groove; 36. limit block. DETAILED DESCRIPTION

[0028] The present invention provides Figures 1 to 10 A battery-driven motor shown includes a motor body 1, on which is disposed a rotating shaft 2 cooperating with a pulley 3, gears, etc. In addition, the motor body 1 is also provided with structures such as a stator and a rotor. The motor body 1 can be powered by a battery, which is convenient for flexible adjustment of the use position, such as long-distance transfer, etc., without considering factors such as wire connection.

[0029] Considering the battery-driven motor in the prior art, the rotating shaft 2 is usually only suitable for docking with a pulley 3 of a single inner diameter size. Especially for the driving motor powered by the battery, if it cannot form an effective docking with the pulley 3 after long-distance transfer, the processing efficiency will be affected. In order to improve the applicability of the battery-driven motor, an air cavity 8 is provided inside the rotating shaft 2, and a first slide groove 4 is provided on the outer wall of the rotating shaft 2. The first slide groove 4 is provided with multiple, and multiple first slide grooves 4 are evenly distributed around the rotating shaft 2, preferably three, to ensure the use strength of the rotating shaft 2. An air hole 13 is provided on the inner wall of the first slide groove 4, and the air hole 13 is located in the middle section of the air cavity 8. The first slide groove 4 is connected to the air cavity 8 through the air hole 13. A slider 5 for radially positioning the pulley 3 is provided inside the first slide groove 4. When the gas enters the first slide groove 4 from the air hole 13, it will push the slider 5 to slide outward and squeeze on the inner ring of the pulley 3.

[0030] A key tooth 6 that matches with the key groove of the pulley 3 is fixedly connected to one of the sliders 5 , and the key tooth 6 matches with the key groove of the pulley 3 .

[0031] A first threaded rod 14 is rotatably disposed on the rotating shaft 2 , and the threads at two ends of the first threaded rod 14 are in opposite directions. Slip rings 9 are slidably disposed on both sides of the air cavity 8 .

[0032] Circular grooves 7 are provided at both ends of the air cavity 8, and a second slide groove 10 is provided on the outer wall of the rotating shaft 2. There are two second slide grooves 10, which are respectively distributed on both sides of the air cavity 8. The second slide groove 10 is connected to the air cavity 8 through the corresponding circular grooves 7.

[0033] A threaded barrel 12 is slidably connected inside the circular groove 7, and the threaded barrel 12 is fixedly connected to the corresponding slip ring 9. The threaded barrel 12 cooperates with the first threaded rod 14, wherein a first square plate 11 is slidably arranged in a second slide groove 10 away from the motor body 1, and the first square plate 11 is attached to the inner wall of the corresponding second slide groove 10, and the first square plate 11 is fixedly connected to the corresponding threaded barrel 12, and a square groove 15 is opened on the first square plate 11; a third party plate 19 is slidably arranged in another second slide groove 10, and the third party plate 19 is fixedly connected to the corresponding threaded barrel 12, and the third party plate 19 is attached to the inner wall of the corresponding second slide groove 10.

[0034] During specific use, rubber pads are provided between the slip ring 9 and the inner wall of the air cavity 8 and between the slip ring 9 and the first threaded rod 14 to reduce wear and improve sealing.

[0035] During operation, the operator rotates the first threaded rod 14. Since the threads at both ends of the first threaded rod 14 are in opposite directions, and the threaded tube 12 cooperates with the first threaded rod 14, and under the limiting action of the first square plate 11 and the third party plate 19, the two threaded tubes 12 move toward each other, so that the two slip rings 9 move toward each other, and the gas between the two slip rings 9 enters the corresponding first slide groove 4 through the air hole 13, pushing multiple sliders 5 to slide outward at the same time and abut against the inner ring of the pulley 3, wherein the key teeth 6 are inserted into the key groove of the pulley 3 to radially position the pulley 3, and the distance that the slider 5 slides outward is adjustable, which is suitable for pulleys 3 with different inner diameters.

[0036] In addition, the structures such as the slip ring 9 and the slider 5 are provided, and the first threaded rod 14 is rotated. Compared with the prior art in which the pulley 3 is installed by hammering, there is no influence on the driving motor.

[0037] In the actual production process, the position where the rotating shaft 2 and the pulley 3 are connected can be assembled and fixed by two parts, such as: after the air cavity 8, the second slide groove 10 and other structures are opened, the two parts are welded and fixed; and the rotating shaft 2 uses high-strength materials, such as: alloy steel, etc., to ensure the strength of use.

[0038] In order to further improve the stability of the positioning of the pulley 3, a first pressure plate 18 is provided on the side of the pulley 3 facing away from the motor body 1, and a second pressure plate 21 is provided on the side of the pulley 3 close to the motor body 1. When the first pressure plate 18 and the second pressure plate 21 move toward each other, they are used to axially position the pulley 3.

[0039] A third threaded rod 20 is threadedly connected to the third plate 19 , and the second pressing plate 21 is fixedly connected to the third threaded rod 20 .

[0040] When the first pressing plate 18 abuts against the outer wall of the pulley 3 , the first threaded rod 14 is limited by the limiting assembly to prevent the first threaded rod 14 from rotating in the reverse direction.

[0041] In specific configuration, the limit assembly includes a second square plate 16, a second threaded rod 17, an outer groove 29, a U-shaped card 30, a slide plate 31, a slide cylinder 32, a spring 33, a vertical plate 34, an inner groove 35 and a limit block 36. The second square plate 16 is inserted into the inside of the square groove 15, the second threaded rod 17 is threadedly connected to the second square plate 16, and the first pressure plate 18 is fixedly connected to the second threaded rod 17. The outer groove 29 is provided at one end of the second threaded rod 17 away from the first pressure plate 18, the U-shaped card 30 is plugged and matched with the outer groove 29, and the wall surface of the outer groove 29 is polygonal. When the U-shaped card 30 is inserted into the outer groove 29, the U-shaped card 30 rotates synchronously with the second threaded rod 17.

[0042] One end of the slide plate 31 is fixedly connected to the U-shaped card 30, and the other end of the slide plate 31 is slidably connected to the inside of the slide cylinder 32. The spring 33 is located inside the slide cylinder 32. One end of the spring 33 is fixedly connected to the slide plate 31, and the other end of the spring 33 is fixedly connected to the inner wall of the slide cylinder 32. The vertical plate 34 is fixedly connected to the outer wall of the slide cylinder 32. The vertical plate 34 and the slide cylinder 32 are distributed in an L shape. The inner groove 35 is opened on the first threaded rod 14, and the limit block 36 is inserted into the inner groove 35. The limit block 36 is fixedly connected to the vertical plate 34. The wall surface of the inner groove 35 is polygonal. When the limit block 36 is inserted into the inner groove 35, the vertical plate 34 rotates synchronously with the first threaded rod 14.

[0043] When installing the pulley 3, the operator removes the first pressing plate 18 together with the limiting assembly, and then inserts the pulley 3 into the outside of the rotating shaft 2, the pulley 3 corresponds to the position of the slider 5, and the key teeth 6 correspond to the key groove of the pulley 3. The first pressing plate 18 and the limiting assembly are set as a movable structure, which does not affect the installation of the pulley 3 into the outside of the rotating shaft 2.

[0044] Then insert the second square plate 16 into the square groove 15, rotate the second threaded rod 17, drive the first pressure plate 18 to move toward the pulley 3, and make the first pressure plate 18 fit on the outer wall of one side of the pulley 3, and at the same time rotate the third threaded rod 20 to drive the second pressure plate 21 to move toward the pulley 3, and make the pulley 3 fit on the outer wall of the other side of the pulley 3, the first pressure plate 18 cooperates with the second pressure plate 21 to axially position the pulley 3, and the distance between the first pressure plate 18 and the second pressure plate 21 is adjustable, which is suitable for pulleys 3 of different thicknesses.

[0045] When the two slip rings 9 move toward each other, the second square plate 16 and the third square plate 19 move toward each other synchronously, thereby reducing the number of rotations of the second threaded rod 17 and the third threaded rod 20 .

[0046] In addition, the radial positioning and axial positioning of the pulley 3 are concentrated on the inner ring of the pulley 3, that is, the connection between the rotating shaft 2 and the pulley 3, which improves the stability of the connection without affecting the coordination between the pulley 3 and the belt and other structures.

[0047] When in use, the slide 32 is pulled on the slide plate 31 in the direction away from the U-shaped card 30, and then the U-shaped card 30 is inserted into the outer groove 29, and the limit block 36 corresponds to the position of the inner groove 35, and then the slide 32 is released, and the return elastic force of the spring 33 causes the slide 32 and the vertical plate 34 to move toward the U-shaped card 30, and the limit block 36 is inserted into the inner groove 35 to achieve a self-locking effect.

[0048] If the first threaded rod 14 shows a tendency to rotate in the opposite direction, that is, the two slip rings 9 may move in opposite directions, but the limit block 36, the vertical plate 34 and the second threaded rod 17 and other structures cooperate to prevent the first threaded rod 14 from rotating in the opposite direction; similarly, the second threaded rod 17 is also unable to rotate in the opposite direction, thereby achieving the effect of synchronous self-locking of radial positioning and axial positioning.

[0049] Furthermore, the elastic supporting force of the spring 33 is appropriate, and when the shaft 2 drives the pulley 3 to rotate at a high speed, the spring 33 will not be deformed, thereby preventing the U-shaped card 30, the slide cylinder 32 and other structures from being thrown out.

[0050] By setting structures such as the slider 5, the first pressure plate 18 and the second pressure plate 21, it is suitable for pulleys 3 with different inner diameters. At the same time, the pulley 3 is radially positioned and axially positioned, and the radial positioning and axial positioning are synchronously self-locked, thereby improving the applicability of the battery-driven motor.

[0051] In order to prevent the second pressing plate 21 from rotating in the opposite direction, and considering that there is a certain gap between the outer wall of the rotating shaft 2 and the inner ring of the pulley 3, a first through hole 22 is provided on the first pressing plate 18, and the first through hole 22 is provided in multiple numbers, and the multiple first through holes 22 are evenly distributed. A second through hole 23 is provided on the second pressing plate 21, and the second through hole 23 is provided in multiple numbers, and the multiple second through holes 23 are evenly distributed. A first round rod 24 is provided on the outside of the rotating shaft 2, and the number of the first through holes 22 and the second through holes 23 is appropriately set, so that one end of the first round rod 24 is inserted into one of the first through holes 22, and the other end of the first round rod 24 is inserted into the corresponding second through hole 23, and a through slot 27 for the first round rod 24 to pass through is provided on the second square plate 16.

[0052] One end of the first round rod 24 close to the second square plate 16 is fixedly connected to a rotating rod 25, and the second round rod 26 is rotatably connected to the rotating rod 25. A torsion spring 28 is sleeved on the outside of the rotating rod 25, and one end of the torsion spring 28 is fixedly connected to the rotating rod 25, and the other end of the torsion spring 28 is fixedly connected to the second round rod 26.

[0053] Before installing the U-shaped card 30, the slide cylinder 32 and other structures, one of the first through hole 22 and the second through hole 23 corresponds to the position of the through slot 27. The first round rod 24 and the second round rod 26 are passed through the through slot 27, the gap between the outer wall of the rotating shaft 2 and the inner ring of the pulley 3, and one end of the first round rod 24 is inserted into the first through hole 22, and the other end of the first round rod 24 is inserted into the second through hole 23 (refer to Figure 6 ), the first pressing plate 18 and the second pressing plate 21 can only rotate synchronously to complete the positioning of the second pressing plate 21 and improve the stability of the positioning of the pulley 3.

[0054] When the second round rod 26 passes through the through slot 27, the operator controls the second round rod 26 to rotate on the rotating rod 25 so that the axis direction of the rotating rod 25 is consistent with the axis direction of the first round rod 24, so as to facilitate passing through the through slot 27. After passing through the through slot 27, the operator releases the second round rod 26, and the restoring elastic force of the torsion spring 28 causes the second round rod 26 to reset and present a certain tilt angle. The end of the second round rod 26 close to the second square plate 16 is staggered from the through slot 27, and under the limiting action of the second square plate 16 and the third plate 19, during the operation of the motor body 1, when the rotating shaft 2 drives the pulley 3 to rotate at high speed, the first round rod 24 and the second round rod 26 will not be directly thrown out.

[0055] The present invention further provides a motor drive system, which is applied to the above-mentioned battery-driven motor and also includes: a battery, a control circuit and a power circuit.

[0056] The battery provides electrical energy and is the energy source for the motor drive system.

[0057] ‌Control circuit‌: Responsible for outputting control signals and adjusting current and voltage by controlling the power switch, thereby achieving control over the operation of the motor.

[0058] Power circuit: Converts the control signal output by the control circuit into actual power output to drive the motor to operate.

[0059] Working principle: The operator removes the first pressure plate 18 together with the limiting assembly, and then inserts the pulley 3 into the outside of the rotating shaft 2, the pulley 3 corresponds to the position of the slider 5, and the key tooth 6 corresponds to the key groove of the pulley 3.

[0060] Insert the second square plate 16 into the square groove 15; then rotate the first threaded rod 14. Since the threads at both ends of the first threaded rod 14 are in opposite directions, and the threaded tube 12 cooperates with the first threaded rod 14, and under the limiting action of the first square plate 11 and the third party plate 19, the two threaded tubes 12 move toward each other, so that the two slip rings 9 move toward each other, and the gas between the two slip rings 9 enters the corresponding first slide groove 4 through the air hole 13, pushing multiple sliders 5 to slide outward at the same time and abut against the inner ring of the pulley 3, wherein the key teeth 6 are inserted into the key groove of the pulley 3 to radially position the pulley 3, and the distance that the slider 5 slides outward is adjustable, which is suitable for different inner rings. The pulley 3 has a diameter; then the second threaded rod 17 is rotated to drive the first pressure plate 18 to move toward the pulley 3, and the first pressure plate 18 is fitted on the outer wall of one side of the pulley 3. At the same time, the third threaded rod 20 is rotated to drive the second pressure plate 21 to move toward the pulley 3, and the pulley 3 is fitted on the outer wall of the other side of the pulley 3. The first pressure plate 18 cooperates with the second pressure plate 21 to axially position the pulley 3, and the distance between the first pressure plate 18 and the second pressure plate 21 is adjustable, which is suitable for pulleys 3 of different thicknesses. In addition, the radial positioning and axial positioning of the pulley 3 are concentrated on the inner ring of the pulley 3, which does not affect the coordination between the pulley 3 and the belt and other structures.

[0061] At this time, one of the first through hole 22 and the second through hole 23 corresponds to the position of the through slot 27. The first round rod 24 and the second round rod 26 pass through the through slot 27, and one end of the first round rod 24 is inserted into the first through hole 22, and the other end of the first round rod 24 is inserted into the second through hole 23 (refer to Figure 6 ), the first pressing plate 18 and the second pressing plate 21 can only rotate synchronously; when the second round rod 26 passes through the through slot 27, the operator controls the second round rod 26 to rotate on the rotating rod 25, and the axis direction of the rotating rod 25 is consistent with the axis direction of the first round rod 24, which is convenient for passing through the through slot 27. After passing through the through slot 27, the operator releases the second round rod 26, and the reset elastic force of the torsion spring 28 resets the second round rod 26, presenting a certain inclination angle, and the end of the second round rod 26 close to the second square plate 16 is staggered from the through slot 27, and under the limiting action of the second square plate 16 and the third party plate 19, during the operation of the motor body 1, when the rotating shaft 2 drives the pulley 3 to rotate at a high speed, the first round rod 24 and the second round rod 26 will not be directly thrown out.

[0062] Then, the slide 32 is pulled on the slide plate 31 in the direction away from the U-shaped card 30, and then the U-shaped card 30 is inserted into the outer groove 29, and the position of the limit block 36 corresponds to the position of the inner groove 35, and then the slide 32 is released, and the return elastic force of the spring 33 makes the slide 32 and the vertical plate 34 move toward the U-shaped card 30, and the limit block 36 is inserted into the inner groove 35 to achieve a self-locking effect. If the first threaded rod 14 tends to rotate in the opposite direction, that is, the two slip rings 9 may move in opposite directions, but the limit block 36, the vertical plate 34 and the second threaded rod 17 and other structures cooperate to prevent the first threaded rod 14 from rotating in the opposite direction; similarly, the second threaded rod 17 cannot rotate in the opposite direction, thereby achieving a synchronous self-locking effect of radial positioning and axial positioning.

Claims

1. A battery-driven motor, comprising a motor body (1), characterized in that: The motor body (1) is provided with a rotating shaft (2) which cooperates with the pulley (3); An air cavity (8) is arranged inside the rotating shaft (2), a first slide groove (4) is arranged on the outer wall of the rotating shaft (2), an air hole (13) is arranged on the inner wall of the first slide groove (4), the first slide groove (4) is connected with the air cavity (8) through the air hole (13), a slider (5) for radially positioning the pulley (3) is slidably arranged inside the first slide groove (4), a first threaded rod (14) is rotatably arranged on the rotating shaft (2), slip rings (9) are slidably arranged on both sides of the air cavity (8), the first threaded rod (14) rotates to drive the two slip rings (9) to move towards each other, and the gas inside the air cavity (8) enters the first slide groove (4) through the air hole (13), pushing the slider (5) to slide outward and abut against the inner ring of the pulley (3); A first pressing plate (18) is provided on the side of the pulley (3) facing away from the motor body (1), and a second pressing plate (21) is provided on the side of the pulley (3) close to the motor body (1), and the first pressing plate (18) and the second pressing plate (21) move towards each other to position the pulley (3) axially; When the first pressing plate (18) abuts against the outer wall of the pulley (3), the first threaded rod (14) is limited by the limiting assembly to prevent the first threaded rod (14) from rotating in the opposite direction.

2. A battery-driven motor according to claim 1, characterized in that: The first sliding grooves (4) are arranged in plurality, and the plurality of first sliding grooves (4) are evenly distributed around the rotating shaft (2).

3. A battery-driven motor according to claim 2, characterized in that: One of the sliders (5) is fixedly connected with a key tooth (6) that matches the key groove of the pulley (3).

4. A battery-driven motor according to claim 1, characterized in that: Both ends of the air cavity (8) are provided with circular grooves (7), and the outer wall of the rotating shaft (2) is provided with a second slide groove (10), and the second slide groove (10) is provided with two, and the two second slide grooves (10) are respectively distributed on both sides of the air cavity (8), and the second slide groove (10) is communicated with the air cavity (8) through the corresponding circular groove (7), and the inside of the circular groove (7) is slidably connected with a threaded cylinder (12), and the threaded cylinder (12) is fixedly connected to the corresponding slip ring (9), and the threaded cylinder (12) cooperates with the first threaded rod (14), wherein a first square plate (11) is slidably arranged in a second slide groove (10) away from the motor body (1), and the first square plate (11) is fixedly connected to the corresponding threaded cylinder (12), and the first square plate (11) is provided with a square groove (15), and a third party plate (19) is slidably arranged in the other second slide groove (10), and the third party plate (19) is fixedly connected to the corresponding threaded cylinder (12).

5. A battery-driven motor according to claim 4, characterized in that: The threads at both ends of the first threaded rod (14) are in opposite directions.

6. A battery-driven motor according to claim 4, characterized in that: The limiting assembly comprises a second square plate (16), a second threaded rod (17), an outer groove (29), a U-shaped clip (30), a slide plate (31), a slide tube (32), a spring (33), a vertical plate (34), an inner groove (35) and a limiting block (36); the second square plate (16) is inserted into the interior of the square groove (15); the second threaded rod (17) is threadedly connected to the second square plate (16); the first pressure plate (18) is fixedly connected to the second threaded rod (17); the outer groove (29) is provided at an end of the second threaded rod (17) away from the first pressure plate (18); the U-shaped clip (30) is plugged into and matched with the outer groove (29); the slide plate (31) One end of the slide plate (31) is fixedly connected to the U-shaped card (30), the other end of the slide plate (31) is slidably connected to the inside of the slide cylinder (32), the spring (33) is located inside the slide cylinder (32), one end of the spring (33) is fixedly connected to the slide plate (31), the other end of the spring (33) is fixedly connected to the inner wall of the slide cylinder (32), the vertical plate (34) is fixedly connected to the outer wall of the slide cylinder (32), the vertical plate (34) and the slide cylinder (32) are distributed in an L shape, the inner groove (35) is opened on the first threaded rod (14), the limit block (36) is inserted into the inside of the inner groove (35), and the limit block (36) is fixedly connected to the vertical plate (34).

7. A battery-driven motor according to claim 6, characterized in that: A third threaded rod (20) is threadedly connected to the third party plate (19), and the second pressing plate (21) is fixedly connected to the third threaded rod (20).

8. A battery-driven motor according to claim 7, characterized in that: The first pressing plate (18) is provided with a first through hole (22), the first through hole (22) is arranged in a plurality and the plurality of first through holes (22) are evenly distributed, the second pressing plate (21) is provided with a second through hole (23), the second through hole (23) is arranged in a plurality and the plurality of second through holes (23) are evenly distributed, a first round rod (24) is arranged outside the rotating shaft (2), one end of the first round rod (24) is inserted into one of the first through holes (22), and the other end of the first round rod (24) is inserted into the corresponding second through hole (23), and the second square plate (16) is provided with a through groove (27) for the first round rod (24) to pass through.

9. A battery-driven motor according to claim 8, characterized in that: One end of the first round rod (24) close to the second square plate (16) is fixedly connected to a rotating rod (25), the rotating rod (25) is rotatably connected to a second round rod (26), and a torsion spring (28) is sleeved on the outside of the rotating rod (25).

10. A motor drive system, characterized in that: The battery-driven motor as claimed in any one of claims 1 to 9 further comprises: a battery, a control circuit and a power circuit.

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