A magnetic transmission with a braking mechanism

Abstract

A magnetic transmission with a braking mechanism comprises a fixed bracket and a transmission, wherein the transmission is fixed by the fixed bracket; the transmission mainly comprises an input bracket, an output bracket, a conversion bracket, N active magnetic blocks, N centrifugal blocks, M passive magnetic blocks and a braking mechanism; a braking mechanism is arranged on the fixed bracket, and the output rod on the output bracket is rotated to hit the shifting block to open the braking mechanism and release the fixed passive magnetic block. Since the active magnetic block on the output rod is very close to the corresponding passive magnetic block fixed by the braking mechanism, a strong repulsive force is generated to push the conversion bracket to rotate quickly, thereby realizing non-contact acceleration and helping to reduce energy loss during the speed change process.

Description

Technical Field

[0001] The invention relates to a magnetic transmission with a braking mechanism, and belongs to the optimization technology of the transmission. Background Art

[0002] In the field of automation, the transmission is a commonly used component. The transmission is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or step-by-step manner. It is also called a gearbox. The transmission consists of a speed transmission mechanism and an operating mechanism. Some cars also have a power output mechanism. Most transmission mechanisms use ordinary gear transmissions, and some use planetary gear transmissions. The transmission mainly changes the speed by the engagement between gears of different diameters. The engagement between gears is a rigid connection. The friction between components will consume part of the energy. Especially when acceleration is required, the energy loss leads to a decrease in acceleration performance. Therefore, it is necessary to find a transmission with better acceleration performance.

[0003] In the magnetic transmission applied by me with application number 2020102088756, the power gear is driven counterclockwise by the power shaft of the motor, and the power gear drives the input gear with a smaller diameter than the power gear to rotate clockwise to achieve the first acceleration, and the input gear drives the input bracket, the output bracket, the active magnetic block and the centrifugal block to rotate synchronously clockwise. The centrifugal block generates centrifugal force during the rotation to accelerate the rotation, and then when one end of the active magnetic block in the clockwise direction approaches the passive magnetic block with the same magnetic property during the rotation, the same magnetic property generates a strong repulsive force to push the passive magnetic block and the conversion bracket fixedly connected to the passive magnetic block to rotate clockwise, the distance between the passive magnetic block and the center of the conversion bracket is less than the distance between the active magnetic block and the center of the input bracket, the speed of the conversion bracket is higher than the speed of the input bracket, the conversion bracket rotates clockwise to drive the conversion gear engaged with it to rotate, and the conversion gear then drives the output gear with a smaller diameter to rotate to achieve multiple accelerations, and the output gear rotates at the same speed as the output shaft engaged with it, and the active magnetic block and the passive magnetic block close to the rotation process generate a relief force to drive the conversion bracket to rotate to achieve non-contact acceleration, which helps to reduce energy loss during the speed change process. The disadvantage is that when the active magnetic block rotates clockwise and approaches the passive magnetic block with the same magnetic properties, the passive magnetic block rotates clockwise due to the magnetic effect of like-pole repulsion. When the distance between the active magnetic block and the passive magnetic block is still far, the repulsive force generated is obviously smaller than when the distance between the active magnetic block and the passive magnetic block is close. Therefore, in order to make the repulsive force generated when the active magnetic block approaches the passive magnetic block greater, the speed of the passive magnetic block rotation will be faster. Therefore, it is necessary to find a way to make the passive magnetic block start to rotate when the active magnetic block is closer to the passive magnetic block. Summary of the invention

[0004] The purpose of the present invention is to provide a braking mechanism for the passive magnetic block, which releases the passive magnetic block only when the active magnetic block is very close to the passive magnetic block, so that the repulsive force generated between the active magnetic block and the passive magnetic block is larger, thereby improving the acceleration performance of the magnetic transmission.

[0005] The technical solution of the present invention is: a magnetic transmission with a braking mechanism, including a fixed bracket and a transmission, the transmission is fixed by the fixed bracket; the transmission mainly includes an input bracket 1, an output bracket 2, a conversion bracket 3, N active magnetic blocks 4, N centrifugal blocks 5, M passive magnetic blocks 6 and a braking mechanism 7; the input bracket and the output bracket have the same structure and size and are arranged oppositely, the input bracket is provided with N input rods, and the output bracket is provided with corresponding N output rods, and an active magnetic block 4 and a centrifugal block 5 are fixed in sequence in a clockwise direction at the end away from the center of each input rod and the corresponding output rod, so that the input bracket and the output bracket are locked together; the input bracket includes a connecting frame, an input bearing, a connecting bearing and an output bearing. The passive magnetic block 6 is placed on the conversion bracket 3; the conversion bracket is fixed to the fixed bracket through the connecting frame; the magnetic properties of the counterclockwise end of the active magnetic block are the same as the magnetic properties of the clockwise end of the passive magnetic block; the input gear is fixed to the middle of the outward end surface of the input bracket, and the input gear is meshed with the power gear; the diameter of the input gear is smaller than the diameter of the power gear; the output bracket 2 also includes an output shaft 21, an output bearing 22, an output fixing frame 23, an output gear 24 and a turntable bearing 25; an output hole is provided in the center of the output bracket, and the output bearing 22 is placed in the output hole, and an output bracket protruding outward is provided on the side of one end of the output fixing frame 23, and a rotating shaft hole is provided at the other end, and the output fixing frame is fixed by the output bracket On the fixed bracket, the output frame is provided with an output shaft hole that passes through the output fixed frame, and the output shaft can rotate in the output shaft hole; the output shaft is provided with an output key that matches the keyway in the center hole of the output gear, and the output shaft is inserted into the output shaft hole of the output fixed frame, so that the output key of the output shaft enters the corresponding keyway in the center hole of the output gear, and the output frame of the output fixed frame is inserted into the center through hole of the output bearing, so that the output bracket can rotate around the output frame under the action of external force, and the turntable bearing 25 is placed in the shaft hole; when the output gear rotates, it will drive the output shaft engaged with it to rotate to output power; the brake mechanism 7 includes a base 71, a shift block 72, a small gear 73, a large gear 74, a small gear shaft rod 75, a large gear shaft rod 76, a pressure The spring adjustment plate 77, spring, movable seat 78, friction plate 79 and adjustment screw are composed. The brake mechanism is fixed to the lower end of the output fixed frame through the base; it is usually welded directly to the output fixed frame by welding; a fixed block 711 is provided on one side of the base 71, and a buckle is provided at the end of the fixed block; an upper connecting ear 712 protruding outward is provided on the upper part of the other side of the base, and a lower connecting ear 713 protruding outward is provided on the lower part; a movable column 781 protruding toward the base is provided on the side of the movable seat 78 close to the upper connecting ear and the lower connecting ear, and a movable through hole is provided on the movable column, and a baffle 782 protruding away from the base is provided on the side of the movable column close to the fixed block, and the friction plate 79 is fixed on the movable seat between the baffle and the movable column;The movable seat presses the spring and the compression spring adjustment plate onto the base, so that the buckle is pressed onto the movable seat outside the baffle. A large tooth screw hole corresponding to the large tooth shaft rod is provided on the upper connecting ear, and a small tooth screw hole corresponding to the small tooth shaft rod is also provided on the upper connecting ear; accordingly, a large tooth hole corresponding to the large tooth shaft rod and a small tooth hole corresponding to the small tooth shaft rod are provided on the lower connecting ear; a large tooth tongue protruding outward is provided on one side of the large gear, and a corresponding movable groove is provided on the edge of the movable through hole; the threaded end of the large gear shaft rod passes through the large tooth hole, the large gear, and the movable through hole from bottom to top in sequence, and then is screwed on the large tooth screw hole, so that the large tooth tongue on the large gear enters the movable groove to form an engagement; the threaded end of the small shaft screw passes through the small tooth hole, the small gear, and the shift block in sequence, and then is screwed on the small tooth screw hole, so that the small gear and the shift block form an engagement; the large gear and the small gear engage with each other. ;

[0006] The braking mechanism also includes an adjusting screw. An adjusting screw hole is provided on the base. The adjusting screw is screwed into the adjusting screw hole so that the end of the adjusting screw passes through the base and rests against the back of the compression spring adjustment plate. By rotating the adjusting screw to change the length of the end of the adjusting screw passing over the base, the compression program of the spring can be changed, thereby changing the initial prestress of the spring.

[0007] A buffer pad is arranged on the wall surface of the baffle facing the friction plate.

[0008] An inwardly recessed spring pit is arranged on the wall surface of the movable seat facing the base, and the end of the spring facing the movable seat enters the spring pit to prevent the spring from axial displacement during use.

[0009] A spring seat is arranged on the compression spring adjustment plate, and the spring sleeve on the spring seat is not prone to deflection and axial displacement.

[0010] Beneficial Effects

[0011] 1. By setting a brake mechanism on the fixed bracket, the output rod on the output bracket rotates and hits the shift block to open the brake mechanism to release the fixed passive magnetic block. Since the active magnetic block on the output rod is very close to the corresponding passive magnetic block fixed by the brake mechanism, a strong repulsive force is generated to push the conversion bracket to rotate quickly, realizing non-contact acceleration and helping to reduce energy loss during the speed change process;

[0012] 2. The motor drives the power gear to rotate counterclockwise through the power shaft, and the power gear drives the input gear with a smaller diameter than the power gear to rotate clockwise to achieve the first acceleration. The input gear drives the input bracket, the output bracket, the active magnetic block and the centrifugal block to rotate synchronously clockwise. The centrifugal block generates centrifugal force during the rotation to accelerate the rotation. Then, when one end of the active magnetic block in the clockwise direction approaches the passive magnetic block with the same magnetic property locked by the braking mechanism during the rotation, an output rod of the output bracket hits the shift block to open the locked conversion bracket. The corresponding active magnetic block on the output rod generates a strong repulsive force due to its proximity to the passive magnetic block locked by the braking mechanism. This repulsive force pushes the passive magnetic block and the conversion bracket fixedly connected to the passive magnetic block to rotate clockwise. The rotation speed of the conversion bracket is higher than the rotation speed of the input bracket. The clockwise rotation of the conversion bracket drives the conversion gear engaged with it to rotate, and the conversion gear then drives the output gear with a smaller diameter to rotate to achieve multiple accelerations. The output gear will rotate at the same speed as the output shaft engaged with it to output power. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A three-dimensional schematic diagram of the appearance of the present invention;

[0014] Figure 2 It is a partial cross-sectional schematic diagram of the present invention;

[0015] Figure 3 for Figure 2 Schematic diagram of partial explosion;

[0016] Figure 4 Schematic diagram of explosion of the present invention;

[0017] Figure 5 is a schematic diagram of the output bracket and the braking mechanism of the present invention;

[0018] Figure 6 for Figure 5 Schematic diagram of explosion;

[0019] Figure 7 An exploded view of the brake mechanism of the present invention;

[0020] Figure 8 A three-dimensional view of a braking mechanism of the present invention from one angle;

[0021] Fig. 9 is a schematic diagram of the braking mechanism of the present invention from another angle;

[0022] Fig.10 is a schematic diagram of a base of the present invention;

[0023] Fig.11 It is a schematic diagram of the movable seat of the present invention. DETAILED DESCRIPTION

[0024] like Figures 1 to 11 As shown, a magnetic transmission with a braking mechanism includes a fixed bracket and a transmission, and the transmission is fixed by the fixed bracket.

[0025] The fixed bracket includes a base, an input seat and an output seat, the input seat and the output seat are fixed on the base, and the transmission is placed between the input seat and the output seat; the power gear is fixed on the input seat, the power shaft of the engine is engaged with the central through hole of the power gear, and when the engine is working, the power shaft drives the power gear to rotate in the same direction and speed.

[0026] The structure of the magnetic transmission with a braking mechanism is the same as that of the magnetic transmission with application number 2020102088756 except for the braking mechanism.

[0027] The transmission mainly includes an input bracket 1, an output bracket 2, a conversion bracket 3, N active magnetic blocks 4, N centrifugal blocks 5, M passive magnetic blocks 6 and a braking mechanism 7; the input bracket and the output bracket have the same structure and size and are arranged opposite to each other, the input bracket is provided with N input rods, and the output bracket is provided with corresponding N output rods. An active magnetic block 4 and a centrifugal block 5 are fixed in sequence in a clockwise direction at the end away from the center of each input rod and the corresponding output rod, so that the input bracket and the output bracket are locked together; the input bracket includes a connecting frame, an input bearing, a connecting bearing and an input gear; the passive magnetic block 6 is placed on the conversion bracket 3.

[0028] By arranging a braking mechanism on the fixed bracket, the output rod on the output bracket is used to hit the shift block when it rotates to open the braking mechanism and release the fixed passive magnetic block. Since the active magnetic block on the output rod is very close to the corresponding passive magnetic block fixed by the braking mechanism, a strong repulsive force is generated to push the conversion bracket to rotate quickly, thereby realizing non-contact acceleration and helping to reduce energy loss during the speed change process.

[0029] The conversion bracket is fixed on the input seat through the connecting frame; the magnetic properties of the counterclockwise end of the active magnetic block are the same as the magnetic properties of the clockwise end of the passive magnetic block;

[0030] The end of the conversion key shaft in the center of the conversion bracket facing the output fixed frame is inserted into the turntable bearing, so that the conversion bracket can rotate in the shaft hole on the output fixed frame under the action of external force; there are two conversion brackets, the two conversion brackets are parallel and connected by a conversion column with a conversion hole in the center, the inner wall of the conversion hole is provided with a keyway, and correspondingly, the central through hole of the conversion gear is also provided with a keyway identical to the conversion hole, the outside of the conversion key shaft is provided with a key matching the conversion hole and the central through hole of the conversion gear, the conversion key shaft is inserted into the conversion hole and the central through hole of the conversion gear, so that the conversion bracket, the conversion key shaft and the conversion gear shaft are engaged with each other; each conversion bracket includes M outwardly protruding conversion rods, the conversion rods are eccentrically arranged, the angle between two adjacent conversion rods is 360 degrees divided by M degrees, and a passive magnetic block is fixed to the ends of the two conversion rods at the same position with screws.

[0031] The input gear is fixed at the middle of the outward end surface of the input bracket, and the input gear is meshed with the power gear; the diameter of the input gear is smaller than the diameter of the power gear. ;

[0032] The output bracket 2 further includes an output shaft 21 , an output bearing 22 , an output fixing frame 23 , an output gear 24 and a turntable bearing 25 .

[0033] An output hole is provided at the center of the output bracket, and the output bearing 22 is arranged in the output hole. An output bracket protruding outward is provided on the side of one end of the output fixing bracket 23, and a rotating shaft hole is provided at the other end. The output fixing bracket is fixed to the fixing bracket through the output bracket, and an output shaft hole penetrating the output fixing bracket is provided on the output bracket, and the output shaft can rotate in the output shaft hole; the output shaft is provided with an output key matching the keyway in the center hole of the output gear, and the output shaft is inserted into the output shaft hole of the output fixing bracket so that the output key of the output shaft enters the corresponding keyway in the center hole of the output gear, and the output bracket of the output fixing bracket is inserted into the center through hole of the output bearing, so that the output bracket can rotate around the output bracket under the action of external force, and the turntable bearing 25 is arranged in the rotating shaft hole; when the output gear rotates, it will drive the output shaft engaged with it to rotate to output power.

[0034] The brake mechanism 7 includes a base 71, a shift block 72, a small gear 73, a large gear 74, a small gear shaft 75, a large gear shaft 76, a compression spring adjustment plate 77, a spring, a movable seat 78, a friction plate 79 and an adjustment screw. The brake mechanism is fixed to the lower end of the output fixing frame through the base; it is usually welded directly to the output fixing frame.

[0035] A fixing block 711 is provided on one side of the base 71, and a buckle is provided at the end of the fixing block; an upper ear 712 protruding outward is provided on the upper part of the other side of the base, and a lower ear 713 protruding outward is provided on the lower part; a movable column 781 protruding toward the base is provided on the side of the movable seat 78 close to the upper and lower ears, and a movable through hole is provided on the movable column; a stopper 782 protruding away from the base is provided on the side of the movable column close to the fixing block, and a friction plate 79 is fixed on the movable seat between the stopper and the movable column; the movable seat presses the spring and the compression spring adjustment plate on the base, so that The buckle is pressed on the movable seat on the outer side of the baffle, and a large tooth screw hole corresponding to the large tooth shaft is provided on the upper ear, and a small tooth screw hole corresponding to the small tooth shaft is also provided on the upper ear; accordingly, a large tooth hole corresponding to the large tooth shaft and a small tooth hole corresponding to the small tooth shaft are provided on the lower ear; a large tooth tongue protruding outward is provided on one side of the large gear, and a corresponding movable groove is provided on the edge of the movable through hole; the threaded end of the large gear shaft passes through the large tooth hole, the large gear, and the movable through hole from bottom to top in turn, and is screwed on the large tooth screw hole, so that the large tooth tongue on the large gear enters the movable groove to form a bite.

[0036] The threaded end of the small shaft screw passes through the small tooth hole, the small gear, and the shift block in sequence and is screwed on the small tooth screw hole, so that the small gear and the shift block are meshed; the large gear and the small gear are meshed with each other.

[0037] The braking mechanism also includes an adjusting screw. An adjusting screw hole is provided on the base. The adjusting screw is screwed into the adjusting screw hole so that the end of the adjusting screw passes through the base and rests against the back of the compression spring adjustment plate. By rotating the adjusting screw to change the length of the end of the adjusting screw passing over the base, the compression program of the spring can be changed, thereby changing the initial prestress of the spring.

[0038] A buffer pad is arranged on the wall surface of the baffle bar facing the friction plate to prevent a rigid collision between the conversion bracket and the baffle bar.

[0039] A spring pit is provided on the wall of the movable seat facing the base, and the end of the spring facing the movable seat enters the spring pit to prevent the spring from axial displacement during use. The spring is preferably a cylindrical spring.

[0040] A spring seat is arranged on the compression spring adjustment plate, and the spring sleeve on the spring seat is not prone to deflection and axial displacement.

[0041] When there are four conversion rods, the conversion bracket is not cross-shaped, but is staggered as shown in the attached figure, so that the extension lines of two opposite conversion rods will not intersect, but ensure that the angle between all adjacent conversion rods is 90 degrees.

[0042] The distance between the passive magnetic block and the center of the conversion bracket is smaller than the distance between the active magnetic block and the center of the input bracket.

[0043] Corresponding snap rings are pressed into the snap ring grooves at both ends of the exposed conversion key shaft to prevent the conversion key shaft from escaping from the conversion gear and the conversion hole.

[0044] When the motor is working, the power shaft drives the power gear to rotate counterclockwise, and the power gear drives the input gear meshed with it to rotate clockwise. The input gear then drives the input bracket fixed with it through the input pin to rotate synchronously clockwise, thereby driving the output bracket fixed with the input bracket, as well as the active magnetic block and the centrifugal block to rotate clockwise. In the process of the centrifugal block rotating clockwise with the input bracket and the output bracket, the centrifugal block is affected by gravity to generate centrifugal force, and the centrifugal force accelerates the clockwise rotation of the input bracket and the output bracket. When the active magnetic block rotates clockwise to approach a passive magnetic block on a conversion bracket, a repulsive force is generated due to the same magnetic properties of the two. The repulsive force pushes the conversion bracket to rotate clockwise, and the rotation of the conversion bracket drives the conversion gear to rotate clockwise. The clockwise rotation of the conversion gear then drives the output gear meshed with it to rotate counterclockwise, and the output gear then drives the output shaft meshed with it to rotate counterclockwise to output power.

[0045] The output bracket is fixed on the fixed bracket and will not rotate. When a conversion rod of the conversion bracket rotates to the brake pad, it rubs against the surface of the brake pad and forces braking, causing the conversion bracket to slow down and stop rotating. If the brake pad fails to completely stop the conversion bracket from rotating, the conversion rod will hit the baffle bar at the end of the brake pad to achieve braking. When the input bracket and the output bracket continue to drive the active magnetic block to rotate close to the stationary passive magnetic block, the output bracket hits the shift block, and the rotation of the shift block drives the small gear to rotate clockwise, thereby driving the large gear meshed with the small gear to rotate counterclockwise, thereby driving the compression spring of the movable seat meshed with the large gear to deform in the direction of the base, causing the movable seat to leave the conversion rod braked by it, and the conversion bracket is about to be released. At this time, the passive magnetic block fixed on the conversion rod generates a repulsive force due to the repulsion of the active magnetic block, driving the conversion bracket to rotate clockwise, and the rotation of the conversion bracket drives the conversion gear to rotate clockwise. The clockwise rotation of the conversion gear drives the output gear meshed with it to rotate counterclockwise, and the output gear drives the output shaft meshed with it to rotate counterclockwise to output power.

[0046] When the brake mechanism releases the conversion bracket, the spring will generate a reset force due to compression to push the movable seat to reset, driving the large gear to rotate clockwise, and then driving the small gear to rotate counterclockwise to reset. When the brake mechanism is reset, any conversion rod in the conversion bracket will be braked when it reaches the brake mechanism, causing the conversion bracket to stop rotating until an output rod on the output bracket hits the shift block on the brake mechanism again, thereby opening the brake mechanism again to release the conversion bracket. The conversion bracket is driven by the repulsive force generated by a group of active magnetic blocks and passive magnetic blocks that are close to each other to rotate quickly to output power, and this cycle repeats until the motor stops working.

[0047] The conversion bracket rotates faster than the input bracket and the output bracket to achieve speed change. When the output bracket rotates again until the conversion rod reaches the braking mechanism, it will be braked again until the output bracket rotates to the toggle block to open the braking mechanism. The conversion bracket rotates again under the influence of the repulsive force between the passive magnetic block and the active magnetic block, and this cycle is repeated to achieve speed change.

[0048] The instantaneous rotation speed of the conversion bracket will be greater than the rotation speed of the input bracket. The rotation speed of the input bracket is constant, while the conversion bracket rotates rapidly in an instant, stops in an instant, and rotates rapidly again in the next instant, and each rotation amplitude is less than or equal to 90 degrees.

[0049] The motor drives the power gear to rotate counterclockwise through the power shaft, and the power gear drives the input gear with a smaller diameter than the power gear to rotate clockwise to achieve the first acceleration. The input gear drives the input bracket, the output bracket, the active magnetic block and the centrifugal block to rotate synchronously clockwise. The centrifugal block generates centrifugal force during the rotation to accelerate the rotation. Then, when one end of the active magnetic block in the clockwise direction approaches the passive magnetic block with the same magnetic properties locked by the braking mechanism during the rotation, an output rod of the output bracket hits the shift block to open the locked conversion bracket. The corresponding active magnetic block on the output rod generates a strong repulsive force due to its proximity to the passive magnetic block locked by the braking mechanism. This repulsive force pushes the passive magnetic block and the conversion bracket fixedly connected to the passive magnetic block to rotate clockwise. The rotation speed of the conversion bracket is higher than the rotation speed of the input bracket. The clockwise rotation of the conversion bracket drives the conversion gear engaged with it to rotate, and the conversion gear then drives the output gear with a smaller diameter to rotate to achieve multiple accelerations. The output gear rotates at the same speed as the output shaft engaged with it to output power to achieve multi-stage speed change.

[0050] The centrifugal block can speed up the rotation speed of the active magnetic block, and can make up for the energy loss caused by the engagement between the power gear and the input gear and the engagement between the conversion gear and the output gear.

[0051] The above embodiments are only used to illustrate the purpose of the present invention, and are not intended to limit the present invention. A person skilled in the art can make various changes or substitutions within the essential scope of the present invention, which should also fall within the scope of protection of the present invention.

Claims

1. A magnetic transmission with a braking mechanism, comprising a fixed bracket and a transmission, wherein the transmission is fixed by the fixed bracket; characterized in that: The transmission mainly comprises an input bracket (1), an output bracket (2), a conversion bracket (3), N active magnetic blocks (4), N centrifugal blocks (5), M passive magnetic blocks (6) and a brake mechanism (7); the input bracket and the output bracket have the same structure and size and are arranged opposite to each other, the input bracket is provided with N input rods, and the output bracket is provided with corresponding N output rods, and an active magnetic block (4) and a centrifugal block (5) are fixed in sequence in a clockwise direction at the ends away from the center of each input rod and the corresponding output rod, so that the input bracket and the output bracket are locked together; the input bracket comprises a connecting frame, an input bearing, a connecting bearing and an input gear; the passive magnetic block (6) is arranged on the conversion bracket (3); the conversion bracket is fixed by the connecting frame On the fixed bracket; the magnetism of the counterclockwise end of the active magnetic block is the same as the magnetism of the clockwise end of the passive magnetic block; the input gear is fixed to the middle of the outward end surface of the input bracket, and the input gear is meshed with the power gear; the diameter of the input gear is smaller than the diameter of the power gear; the output bracket (2) also includes an output shaft (21), an output bearing (22), an output fixed frame (23), an output gear (24) and a turntable bearing (25); an output hole is provided at the center of the output bracket, and the output bearing (22) is arranged in the output hole; an output frame protruding outward is provided on the side of one end of the output fixed frame (23), and a rotating shaft hole is provided at the other end; the output fixed frame is fixed to the fixed bracket through the output frame, and the output frame is provided with an output shaft penetrating the output fixed frame The output shaft is capable of rotating in the output shaft hole; the output shaft is provided with an output key matching the keyway in the center hole of the output gear; the output shaft is inserted into the output shaft hole of the output fixing frame so that the output key of the output shaft enters the corresponding keyway in the center hole of the output gear; the output frame of the output fixing frame is inserted into the center through hole of the output bearing so that the output bracket can rotate around the output bracket under the action of external force; the turntable bearing (25) is arranged in the rotating shaft hole; when the output gear rotates, it drives the output shaft engaged therewith to rotate and output power; the braking mechanism (7) comprises a base (71), a shifting block (72), a small gear (73), a large gear (74), a small gear shaft rod (75), a large gear shaft rod (76), a compression spring adjustment plate (77), a spring, and a movable seat (78), a friction plate (79) and an adjusting screw, the braking mechanism is fixed to the lower end of the output fixing frame through a base; it is usually directly welded to the output fixing frame by welding; a fixing block (711) is provided on one side of the base (71), and a buckle is provided at the end of the fixing block; an upper connecting ear (712) protruding outward is provided on the upper part of the other side of the base, and a lower connecting ear (713) protruding outward is provided on the lower part; a movable column (781) protruding toward the base is provided on the side of the movable seat (78) close to the upper connecting ear and the lower connecting ear, and a movable through hole is provided on the movable column, and a blocking bar (782) protruding away from the base is provided on the side of the movable column close to the fixed block, and the friction plate (79) is fixed on the movable seat between the blocking bar and the movable column;The movable seat presses the spring and the compression spring adjustment plate onto the base, so that the buckle is pressed onto the movable seat outside the baffle. A large tooth screw hole corresponding to the large tooth shaft rod is provided on the upper connecting ear, and a small tooth screw hole corresponding to the small tooth shaft rod is also provided on the upper connecting ear; accordingly, a large tooth hole corresponding to the large tooth shaft rod and a small tooth hole corresponding to the small tooth shaft rod are provided on the lower connecting ear; a large tooth tongue protruding outward is provided on one side of the large gear, and a corresponding movable groove is provided on the edge of the movable through hole; the threaded end of the large gear shaft rod passes through the large tooth hole, the large gear, and the movable through hole from bottom to top in sequence, and then is screwed on the large tooth screw hole, so that the large tooth tongue on the large gear enters the movable groove to form an engagement; the threaded end of the small shaft screw passes through the small tooth hole, the small gear, and the shift block in sequence, and then is screwed on the small tooth screw hole, so that the small gear and the shift block form an engagement; the large gear and the small gear engage with each other. ; 2. The magnetic transmission with a braking mechanism according to claim 1, characterized in that: The braking mechanism also includes an adjusting screw. An adjusting screw hole is provided on the base. The adjusting screw is screwed into the adjusting screw hole so that the end of the adjusting screw passes through the base and rests against the back of the compression spring adjustment plate. By rotating the adjusting screw to change the length of the end of the adjusting screw passing over the base, the compression program of the spring can be changed, thereby changing the initial prestress of the spring.

3. The magnetic transmission with a braking mechanism according to claim 1, characterized in that: A buffer pad is arranged on the wall surface of the baffle facing the friction plate.

4. The magnetic transmission with a braking mechanism according to claim 1, characterized in that: An inwardly recessed spring pit is arranged on the wall surface of the movable seat facing the base, and the end of the spring facing the movable seat enters the spring pit to prevent the spring from axial displacement during use.

5. The magnetic transmission with a braking mechanism according to claim 1, characterized in that: A spring seat is arranged on the compression spring adjustment plate, and the spring sleeve on the spring seat is not prone to deflection and axial displacement.

6. The magnetic transmission with a braking mechanism according to claim 1, characterized in that: When the motor is working, the power shaft drives the power gear to rotate counterclockwise, and the power gear drives the input gear engaged with it to rotate clockwise. The input gear then drives the input bracket fixed with it through the input pin to rotate synchronously clockwise, thereby driving the output bracket fixed with the input bracket, as well as the active magnetic block and the centrifugal block to rotate clockwise. In the process of the centrifugal block rotating clockwise with the input bracket and the output bracket, the centrifugal block is affected by gravity to generate centrifugal force, and the centrifugal force accelerates the clockwise rotation of the input bracket and the output bracket. When the active magnetic block rotates clockwise to approach a passive magnetic block on a conversion bracket, the two have the same magnetic properties and generate displacement. The repulsive force pushes the conversion bracket to rotate clockwise, and the rotation of the conversion bracket drives the conversion gear to rotate clockwise. The clockwise rotation of the conversion gear drives the output gear engaged with it to rotate counterclockwise, and the output gear drives the output shaft engaged with it to rotate counterclockwise to output power; the output fixed bracket is fixed on the fixed bracket and will not rotate. When a conversion rod of the conversion bracket rotates to the brake pad, it rubs against the surface of the brake pad to force braking, causing the conversion bracket to slow down and stop rotating. If the brake pad fails to completely stop the conversion bracket from rotating, the conversion rod will hit the baffle at the end of the brake pad to achieve braking, and the input bracket and the output bracket continue to drive the active magnetic block to rotate until they are close to the brake pad. When the passive magnetic block is close to being stationary, the output bracket hits the shift block, and the rotation of the shift block drives the small gear to rotate clockwise, thereby driving the large gear meshing with the small gear to rotate counterclockwise, thereby driving the compression spring of the movable seat meshing with the large gear to deform in the direction of the base, so that the movable seat leaves the conversion rod braked by it, and releases the conversion bracket. At this time, the passive magnetic block fixed on the conversion rod generates a repulsive force due to the repulsion of the active magnetic block, driving the conversion bracket to rotate clockwise, and the rotation of the conversion bracket drives the conversion gear to rotate clockwise. The clockwise rotation of the conversion gear then drives the output gear meshing with it to rotate counterclockwise, and the output gear then drives the output shaft meshing with it to rotate counterclockwise. The brake mechanism releases the conversion bracket, and the spring will generate a reset force due to compression, pushing the movable seat to reset, driving the large gear to rotate clockwise, and then driving the small gear to rotate counterclockwise to reset; when the brake mechanism is reset, any conversion rod in the conversion bracket will be braked when it rotates to reach the brake mechanism, causing the conversion bracket to stop rotating, until an output rod on the output bracket hits the shift block on the brake mechanism again, thereby opening the brake mechanism again to release the conversion bracket, and the conversion bracket is driven by the repulsive force generated between a group of active magnetic blocks and passive magnetic blocks close to each other to quickly rotate to output power, and this cycle is repeated until the motor stops working.

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