阅读说明：本技术 一种电动自行车动力控制装置及其控制方法 (Power control device and control method for electric bicycle ) 是由 刘建国 金华良 于 2021-09-02 设计创作，主要内容包括：本发明涉及电动自行车领域,尤其涉及一种电动自行车动力控制装置及其控制方法,包括有固定圆盘、定子固定座、动力轴、支撑管等；固定圆盘固定安装在电动自行车车架后方,固定圆盘右侧固定安装有定子固定座,固定圆盘中央转动式连接有动力轴,动力轴上转动式连接有支撑管,支撑管与电动自行车车架固接。通过设置的电压调节杆,电动自行车行驶速度超过变频器中的预设值时,能够调节电压调节杆以改变变频器中的电源频率,从而改变铁芯定子中的电压,进而改变转子的转速,使轮毂转动速度降低,使电动自行车减速,避免电动自行车行驶速度过快。(The invention relates to the field of electric bicycles, in particular to a power control device of an electric bicycle and a control method thereof, which comprises a fixed disc, a stator fixed seat, a power shaft, a supporting tube and the like; fixed disc fixed mounting has the stator fixing base at electric bicycle frame rear, fixed disc right side fixed mounting, and fixed disc central authorities rotary type is connected with the power shaft, and the last rotation type of power shaft is connected with the stay tube, stay tube and electric bicycle frame rigid coupling. Through the voltage regulation pole that sets up, when electric bicycle speed of traveling exceeded the default in the converter, can adjust the power frequency of voltage regulation pole in order to change the converter to change the voltage in the iron core stator, and then change the rotational speed of rotor, make wheel hub slew velocity reduce, make electric bicycle slow down, avoid electric bicycle speed of traveling too fast.)

1. The utility model provides an electric bicycle power control device, including fixed disc (1), fixed disc (1) fixed mounting is at electric bicycle frame rear, its characterized in that still including:

the stator fixing seat (11) is fixedly arranged on the right side of the fixed disc (1); the center of the fixed disc (1) is rotatably connected with the power shaft (2), and the power shaft (2) is used for transmitting power;

the power shaft (2) is rotatably connected with a supporting pipe (3), and the supporting pipe (3) is fixedly connected with the frame of the electric bicycle;

the sealing disc (4) is rotatably connected to the supporting tube (3), a hub (5) is fixedly connected to the left side of the sealing disc (4), and the hub (5) is used for transmitting power to the wheels of the electric bicycle;

the planetary reduction driving assembly (6), the supporting tube (3) is provided with the planetary reduction driving assembly (6), the planetary reduction driving assembly (6) is used for driving an electric bicycle, the planetary reduction driving assembly (6) comprises an iron core stator (61), a rotor (62), a fixed tripod (63), a rotating shaft (64), a power gear (65), a transmission gear (66) and a fixed gear ring (67), the iron core stator (61) is fixedly installed on a stator fixing seat (11), the rotor (62) is fixedly connected to the middle of a power shaft (2), the rotor (62) is positioned in the iron core stator (61), the fixed tripod (63) is fixedly connected to the left end of the supporting tube (3), the rotating shaft (64) is rotatably connected to the fixed tripod (63) in a triangular distribution mode, the power gear (65) is fixedly connected to the power shaft (2), the transmission gear (66) is fixedly connected to the rotating shaft (64), the power gear (65) is meshed with the three transmission gears (66), a fixed gear ring (67) is fixedly connected in the hub (5), and the fixed gear ring (67) is meshed with the three transmission gears (66);

overspeed limiting assembly (7), fixed disc (1) left side fixed mounting have overspeed limiting assembly (7), and overspeed limiting assembly (7) are used for slowing down electric bicycle when its speed of travel surpasses the default in the converter.

2. The power control device of the electric bicycle according to claim 1, wherein the overspeed limiting assembly (7) comprises a fixed housing (71), a frequency converter (72), a voltage regulating rod (73), a lifting convex rod (74), a compression spring (75), a fixed groove block (76), a centrifugal sliding block (77) and a tension spring I (78), the fixed housing (71) is fixedly installed on the left side of the fixed disc (1), the frequency converter (72) is arranged in the fixed housing (71), the voltage regulating rod (73) is slidably connected on the frequency converter (72), the lifting convex rod (74) is slidably connected on the right side of the frequency converter (72), the lifting convex rod (74) penetrates through the fixed disc (1), the lifting convex rod (74) and the voltage regulating rod (73) are in contact with each other, the compression spring (75) is connected between the lifting convex rod (74) and the frequency converter (72), the compression spring (75) also penetrates through the fixed disc (1), the middle part of the power shaft (2) is fixedly connected with a fixed groove block (76), the fixed groove block (76) is connected with a centrifugal sliding block (77) in a sliding mode, and a tension spring I (78) is connected between the centrifugal sliding block (77) and the fixed groove block (76).

3. The power control device of the electric bicycle according to claim 2, further comprising a brake assembly (8), the brake assembly (8) is disposed at the rear side of the fixed housing (71), the brake assembly (8) comprises an extension plate (81), a piston cylinder (82), a brake pull rod (83), a piston extrusion rod (84), a piston push rod (85), a brake pad (86) and a tension spring II (87), the extension plate (81) is fixedly connected to the rear side of the fixed housing (71), the piston cylinder (82) is disposed on the extension plate (81), the brake pull rod (83) is slidably connected to the extension plate (81), the piston extrusion rod (84) is slidably connected to the piston cylinder (82), the piston extrusion rod (84) is fixedly connected to the brake pull rod (83), the piston push rod (85) is slidably connected to the piston cylinder (82), the brake pad (86) is fixedly connected to the right side of the piston push rod (85), a tension spring II (87) is connected between the brake pull rod (83) and the rear side of the fixed shell (71).

4. The power control device of an electric bicycle according to claim 3, wherein the brake pad (86) is composed of a steel plate, an adhesive heat-insulating layer and a friction block, and plays a decisive role in braking effect, and the electric bicycle is decelerated and braked due to the friction effect.

5. The power control device of the electric bicycle according to claim 3, further comprising a brake deceleration assembly (9), wherein the brake deceleration assembly (9) is arranged on the fixed housing (71), the brake deceleration assembly (9) comprises a connecting convex rod (91), a lifting speed limiting rod (92) and a voltage pause button (93), the connecting convex rod (91) is fixedly connected to the left side of the brake pad (86), the lifting speed limiting rod (92) is slidably connected to the fixed housing (71), the lifting speed limiting rod (92) is in contact with the voltage regulation rod (73), the lifting speed limiting rod (92) is in contact with the connecting convex rod (91), the voltage pause button (93) is fixedly mounted at the rear side of the fixed housing (71), and the connecting convex rod 91 is in contact with the voltage pause button 93 when moving.

6. The power control device of the electric bicycle according to claim 5, further comprising an internal brake assembly (10), wherein the internal brake assembly (10) is disposed in the fixed disc (1), the internal brake assembly (10) comprises a fixed guide ring (101), a braking arc-shaped magnet block (102), an extrusion spring (103), a movable rod (104) and an electromagnet (105), the fixed guide ring (101) is disposed in the fixed disc (1), the braking arc-shaped magnet block (102) is symmetrically and slidably connected to the fixed guide ring (101), the braking arc-shaped magnet block (102) is in contact with the power shaft (2), the extrusion spring (103) is connected between the braking arc-shaped magnet block (102) and the fixed guide ring (101), the movable rod (104) is symmetrically and rotatably connected to the fixed disc (1), and the electromagnet (105) is fixedly connected to the movable rod (104), the two electromagnets (105) and the two braking arc-shaped magnet blocks (102) are mutually adsorbed.

7. The power control device of the electric bicycle as claimed in claim 6, wherein the arc surface of the braking arc magnet block (102) is wave-shaped, the braking arc magnet block (102) can increase the friction between itself and the power shaft (2), and the braking arc magnet block (102) can sufficiently clamp the power shaft (2) to promote the power shaft (2) to stop moving.

8. The power control device of the electric bicycle according to claim 6, further comprising an adjusting assembly (12), wherein the adjusting assembly (12) is fixedly connected to the movable rod (104), the adjusting assembly (12) comprises a fixed spring shifting piece (121) and a rotating handle (122), the fixed spring shifting piece (121) is fixedly connected to the movable rod (104), the fixed spring shifting piece (121) is in contact with the fixed disc (1), and the rotating handle (122) is fixedly connected to the fixed spring shifting piece (121).

9. The power control device of an electric bicycle according to claim 8, wherein the fixed spring finger (121) has high elastic limit, fatigue limit, impact toughness and good heat treatment performance, and the fixed spring finger (121) supports the movable rod (104) by friction between itself and the fixed disc (1) when the device is operated.

10. A control method of a power control device of an electric bicycle is characterized by comprising the following working steps:

s1: driving the electric bicycle: the current in the battery is transmitted to a coil winding on an iron core stator (61) through a frequency converter (72), so that the iron core stator (61) generates an alternating magnetic field, a rotor (62) rotates by means of electromagnetic induction, the rotor (62) drives a power shaft (2) and an upper device thereof to rotate at a high speed, a power gear (65) drives a fixed gear ring (67) and a hub (5) to rotate through a transmission gear (66), and power is provided for the electric bicycle so that the electric bicycle runs forwards;

s2: electric bicycle speed reduction: when the rotating speeds of the rotor (62) and the power shaft (2) exceed a preset value in the frequency converter (72), the fixed groove block (76) rotates at a high speed to generate centrifugal force, so that the centrifugal sliding block (77) pushes the lifting convex rod (74) and the voltage adjusting rod (73) to move upwards, and the voltage adjusting rod (73) changes the power frequency through the frequency converter (72), thereby changing the voltage in the iron core stator (61), further changing the rotating speed of the rotor (62), reducing the rotating speeds of the rotor (62) and the power shaft (2), and reducing the speed of the electric bicycle;

s3: braking of the electric bicycle: a rider presses a brake handle, the brake handle pulls a brake pull rod (83) and a piston extrusion rod (84) to move in a direction away from a fixed shell (71) through a brake cable, the piston extrusion rod (84) applies pressure to piston compression oil in a piston cylinder (82), and the piston compression oil transmits the pressure to a piston push rod (85), so that a brake pad (86) and a hub (5) are rubbed to play a role in braking;

s4: braking and decelerating: the brake pad (86) drives the connecting convex rod (91) to move towards the direction close to the hub (5), the connecting convex rod (91) pushes the voltage regulating rod (73) to move upwards through the lifting speed limiting rod (92), so that the rotating speed of the hub (5) is reduced, the safety accident rate can be reduced by reducing the speed when the electric bicycle is braked, and meanwhile, the abrasion degree of the brake pad (86) can be reduced;

s5: emergency braking: the rider presses the brake handle to the bottom, the connecting convex rod (91) can press the voltage pause button (93), the voltage pause button (93) controls the frequency converter (72) to stop outputting current, and the coil winding on the iron core stator (61) loses current to enable the rotor (62) and the upper device thereof to stop rotating, so that the hub (5) does not rotate any more to brake the electric bicycle;

s6: auxiliary braking: the coil winding on the iron core stator (61) loses current to enable the electromagnet (105) to be powered off and lose magnetism, the compressed extrusion spring (103) resets to drive the braking arc-shaped magnet block (102) to move oppositely to clamp the power shaft (2), the power shaft (2) and the upper device thereof are prevented from continuously rotating under the action of inertia, and the braking effect of the electric bicycle is improved;

s7: and (3) foot pedal driving: when the battery of the electric bicycle is dead, a rider manually rotates the rotating handle (122), the rotating handle (122) drives the fixed spring shifting piece (121) and the upper device thereof to rotate, the electromagnet (105) pushes the two braking arc-shaped magnet blocks (102) to move relatively, so that the braking arc-shaped magnet blocks (102) no longer limit the power shaft (2), and the rider can drive the bicycle by pedaling.

Technical Field

The invention relates to the field of electric bicycles, in particular to a power control device of an electric bicycle and a control method thereof.

Background

The electric bicycle is a mechatronic personal transportation tool which takes a storage battery as auxiliary energy and is provided with an electric motor, a controller, the storage battery, a rotating handle brake handle and other operation parts and a display instrument system on the basis of a common bicycle.

However, in the prior art, the size and space of the wheel of the electric bicycle are limited, the hub motor cannot be effectively arranged, and meanwhile, the hub motor cannot be effectively protected, so that the hub motor is inconvenient to apply to the electric bicycle, the unsprung mass is increased, the braking pressure is higher, the heat generated by the motor in operation is larger, a large amount of electric energy is consumed for maintaining the operation of a braking system, the requirement on the braking performance is high, the electric braking performance of the existing hub motor is limited, the existing electric bicycle is easy to wear a brake pad after being used for a long time, the electric bicycle is difficult to brake, and great potential safety hazards exist.

Disclosure of Invention

Therefore, in order to solve the above problems, it is necessary to provide an electric bicycle power control apparatus and a control method thereof, which can decelerate the electric bicycle when the running speed of the electric bicycle exceeds the preset value in the inverter, stop the electric bicycle in emergency braking, reduce the occurrence rate of safety accidents, and improve the braking effect of the electric bicycle, so as to solve the problems of limited electric braking performance of the existing hub motor, easy abrasion of the brake pad after long-term use, difficulty in braking the electric bicycle, and large potential safety hazard in the background art.

The technical scheme is as follows: the utility model provides an electric bicycle power control device and control method thereof, includes fixed disc, and fixed disc fixed mounting is in electric bicycle frame rear, still includes:

the stator fixing seat is fixedly arranged on the right side of the fixed disc;

the center of the fixed disc is rotatably connected with a power shaft which is used for transmitting power;

the power shaft is rotatably connected with a support pipe which is fixedly connected with the frame of the electric bicycle;

the sealing disc is rotatably connected to the supporting tube, a hub is fixedly connected to the left side of the sealing disc and is used for transmitting power to the wheels of the electric bicycle;

the planetary reduction driving assembly comprises an iron core stator, a rotor, a fixed tripod, a rotating shaft, a power gear, a transmission gear and a fixed gear ring, the iron core stator is fixedly installed on a stator fixing seat, the rotor is fixedly connected to the middle of a power shaft, the rotor is located in the iron core stator, the fixed tripod is fixedly connected to the left end of the supporting tube, the rotating shaft is rotatably connected to the fixed tripod in a triangular distribution mode, the power gear is fixedly connected to the power shaft, the transmission gear is fixedly connected to the rotating shaft, the power gear is meshed with the three transmission gears, the fixed gear ring is fixedly connected to the inside of a hub, and the fixed gear ring is meshed with the three transmission gears;

overspeed limiting assembly, fixed disc left side fixed mounting have overspeed limiting assembly, and overspeed limiting assembly is used for slowing down electric bicycle when its speed of travel surpasss the default in the converter.

Further, overspeed limitation subassembly is including fixed shell, the converter, the voltage regulation pole, the protruding pole that goes up and down, compression spring, the fixed slot piece, centrifugal sliding block and tension spring one, fixed disc left side fixed mounting has fixed shell, be provided with the converter in the fixed shell, the sliding connection has the voltage regulation pole on the converter, the sliding connection has the protruding pole that goes up and down on the converter right side, the protruding pole that goes up and down passes fixed disc, the protruding pole that goes up and down and voltage regulation pole mutual contact, be connected with compression spring between protruding pole and the converter that goes up and down, compression spring passes fixed disc equally, power shaft middle part rigid coupling has the fixed slot piece, the sliding connection has centrifugal sliding block on the fixed slot piece, be connected with tension spring one between centrifugal sliding block and the fixed slot piece.

Further, still including brake assembly, the fixed shell rear side is provided with brake assembly, brake assembly is including extending the board, the piston tube, the brake pull rod, the piston extrusion pole, the piston catch bar, brake block and tension spring two, fixed shell rear side fixedly connected with extends the board, be provided with the piston tube on the extension board, sliding connection has the brake pull rod on the extension board, sliding connection has the piston extrusion pole on the piston tube, piston extrusion pole and brake pull rod rigid coupling, piston catch bar sliding connection is on the piston tube, piston catch bar right side rigid coupling has the brake block, be connected with tension spring two between brake pull rod and the fixed shell rear side.

Furthermore, the brake block comprises steel sheet, bonding insulating layer and clutch blocks, plays decisive role to the brake effect, because the friction makes electric bicycle slow down the brake.

Further, still including brake slow-down subassembly, be equipped with brake slow-down subassembly on the fixed shell, brake slow-down subassembly is including connecting the nose bar, go up and down speed limit pole and voltage pause button, brake block left side fixedly connected with connects the nose bar, the sliding connection has the lift speed limit pole on the fixed shell, go up and down speed limit pole and voltage regulation pole mutual contact, go up and down speed limit pole and connect the nose bar mutual contact, voltage pause button fixed mounting is in fixed shell rear side, contact with voltage pause button when connecting the nose bar motion.

Further, still including inside braking subassembly, be provided with inside braking subassembly in the fixed disc, inside braking subassembly is including fixed guide ring, braking arc magnet piece, the extrusion spring, movable rod and electro-magnet, be provided with fixed guide ring in the fixed disc, the last symmetry slidingtype of fixed guide ring is connected with braking arc magnet piece, braking arc magnet piece and power shaft contact each other, be connected with the extrusion spring between braking arc magnet piece and the fixed guide ring, the symmetry rotary type is connected with the movable rod in the fixed disc, the rigid coupling has the electro-magnet on the movable rod, two electro-magnets and two braking arc magnet pieces adsorb each other.

Furthermore, the cambered surface of the braking arc-shaped magnet block is in a wavy tooth shape, the braking arc-shaped magnet block can increase the friction force between the braking arc-shaped magnet block and the power shaft, and the braking arc-shaped magnet block can sufficiently clamp the power shaft to enable the power shaft to stop moving.

Furthermore, the adjustable spring support device further comprises an adjusting assembly, the movable rod is fixedly connected with the adjusting assembly, the adjusting assembly comprises a fixed spring shifting piece and a rotating handle, the movable rod is fixedly connected with a fixed spring shifting piece, the fixed spring shifting piece is in mutual contact with the fixed disc, and the fixed spring shifting piece is fixedly connected with the rotating handle.

Furthermore, the fixed spring shifting piece has high elastic limit, fatigue limit, impact toughness and good heat treatment performance, and supports the movable rod through friction between the fixed spring shifting piece and the fixed disc when the equipment runs.

Further, the control method of the power control device of the electric bicycle further comprises the following working steps:

s1: driving the electric bicycle: the current in the battery is transmitted to a coil winding on an iron core stator through a frequency converter, so that the iron core stator generates an alternating magnetic field, a rotor rotates by means of electromagnetic induction, the rotor drives a power shaft and a device on the power shaft to rotate at a high speed, a power gear drives a fixed gear ring and a hub to rotate through a transmission gear, and the power gear provides power for the electric bicycle to enable the electric bicycle to run forwards;

s2: electric bicycle speed reduction: when the rotating speed of the rotor and the power shaft exceeds a preset value in the frequency converter, the fixed groove block rotates at a high speed to generate centrifugal force, so that the centrifugal sliding block pushes the lifting convex rod and the voltage adjusting rod to move upwards, the voltage adjusting rod changes the power frequency through the frequency converter, the voltage in the iron core stator is changed, the rotating speed of the rotor and the power shaft is reduced, and the electric bicycle is decelerated;

s3: braking of the electric bicycle: the rider presses the brake handle, the brake handle pulls the brake pull rod and the piston extrusion rod to move in the direction away from the fixed shell through the brake cable, the piston extrusion rod applies pressure to piston compression oil in the piston cylinder, and the piston compression oil transmits the pressure to the piston push rod, so that the brake pad and the hub are rubbed to play a braking role;

s4: braking and decelerating: the brake pad drives the connecting convex rod to move towards the direction close to the hub, and the connecting convex rod can push the voltage adjusting rod to move upwards through the lifting speed limiting rod, so that the rotating speed of the hub is reduced, the safety accident rate can be reduced by reducing the speed when the electric bicycle is braked, and meanwhile, the abrasion degree of the brake pad can be reduced;

s5: emergency braking: the rider presses the brake handle to the bottom, the connecting convex rod can press the voltage pause button, the voltage pause button controls the frequency converter to stop outputting current, and the coil winding on the iron core stator loses current to enable the rotor and the device on the rotor to stop rotating, so that the hub does not rotate to brake the electric bicycle;

s6: auxiliary braking: the coil winding on the iron core stator loses current to enable the electromagnet to be powered off and lose magnetism, the compressed extrusion spring is reset to drive the braking arc-shaped magnet blocks to move oppositely to clamp the power shaft, the power shaft and the device on the power shaft are prevented from continuing to rotate under the action of inertia, and the braking effect of the electric bicycle is improved;

s7: and (3) foot pedal driving: when the storage battery of the electric bicycle is powered off, a rider manually rotates the rotating handle, the rotating handle drives the fixed spring shifting piece and the device on the fixed spring shifting piece to rotate, the electromagnet pushes the two braking arc-shaped magnet blocks to move relatively, the braking arc-shaped magnet blocks no longer limit the power shaft, and the rider can drive the bicycle through the pedal.

The beneficial effects are that:

1. through the arranged voltage adjusting rod, when the running speed of the electric bicycle exceeds a preset value in the frequency converter, the voltage adjusting rod can be adjusted to change the power supply frequency in the frequency converter, so that the voltage in the iron core stator is changed, the rotating speed of the rotor is further changed, the rotating speed of the hub is reduced, the electric bicycle is decelerated, and the phenomenon that the running speed of the electric bicycle is too high is avoided;

2. when a rider brakes, the voltage adjusting rod can be adjusted, so that the rotating speed of the hub is reduced, the safety accident rate can be reduced by reducing the speed when the electric bicycle is braked, the safety accident caused by brake failure when the hub rotates at a high speed is avoided, the use frequency of the brake pad can be reduced, the abrasion degree of the brake pad is reduced, and the service life of the brake pad is prolonged;

3. the voltage pause button can control the frequency converter to stop outputting current through the arranged voltage pause button, and when a rider performs emergency braking, the voltage pause button can be pressed, so that the hub does not rotate any more, the electric bicycle stops, and traffic accidents are avoided;

4. through the electromagnet that sets up, when voltage pause button control electric bicycle went to stop, the electromagnet outage lost magnetism, and the extrusion spring of compressed resets and drives braking arc magnet piece and move in opposite directions and press from both sides the power shaft tight, avoids power shaft and device on it to continue to rotate because of inertial action, improves electric bicycle's braking effect.

Drawings

FIG. 1 is a schematic perspective view of a first embodiment of the present invention;

FIG. 2 is a schematic perspective view of a second embodiment of the present invention;

FIG. 3 is a third perspective view of the present invention;

FIG. 4 is a schematic view of a fourth embodiment of the present invention;

FIG. 5 is a schematic view of a first partially unitary construction of the planetary reduction drive assembly of the present invention;

FIG. 6 is a schematic partially disassembled perspective view of the planetary reduction drive assembly of the present invention;

FIG. 7 is a schematic view of a second partial body construction of the planetary reduction drive assembly of the present invention;

FIG. 8 is a schematic diagram of a fifth three-dimensional structure according to the present invention;

FIG. 9 is a schematic perspective view, partially broken away, of the overspeed limiting assembly of this invention;

FIG. 10 is a schematic view of a first partially assembled body of the overspeed limiting assembly of this invention;

FIG. 11 is a perspective view of a portion of the brake assembly of the present invention;

FIG. 12 is a schematic perspective view, partially in section, of the brake assembly of the present invention;

FIG. 13 is a schematic view of a second partially assembled body of the overspeed limiting assembly of this invention;

FIG. 14 is a perspective view of the internal brake assembly of the present invention;

FIG. 15 is a schematic perspective view of an adjustment assembly of the present invention;

FIG. 16 is a flow chart illustrating the operation steps of the present invention.

Reference numerals: 1_ fixed disk, 11_ stator fixed seat, 2_ power shaft, 3_ support tube, 4_ seal, 5_ hub, 6_ planetary reduction drive assembly, 61_ iron core stator, 62_ rotor, 63_ fixed tripod, 64_ rotating shaft, 65_ power gear, 66_ transmission gear, 67_ fixed ring gear, 7_ overspeed limiting assembly, 71_ fixed housing, 72_ frequency converter, 73_ voltage regulating rod, 74_ lifting convex rod, 75_ compression spring, 76_ fixed slot block, 77_ centrifugal sliding block, 78_ tension spring one, 8_ brake assembly, 81_ extension plate, 82_ piston cylinder, 83_ brake pull rod, 84_ piston squeeze rod, 85_ piston push rod, 86_ brake pad, 87_ tension spring two, 9_ brake deceleration assembly, 91_ connecting convex rod, 92_ lifting limiting rod, 93_ voltage pause button, 10_ internal brake assembly, 101_ fixed guide ring, 102_ brake arc magnet block, 103_ pressing spring, 104_ movable rod, 105_ electromagnet, 12_ adjusting component, 121_ fixed spring plectrum, and 122_ rotating handle.

Detailed Description

In order to make the technical solution and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

A power control device of an electric bicycle and a control method thereof are disclosed, as shown in figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 13, comprising a fixed disc 1, a stator fixing seat 11, a power shaft 2, a support pipe 3, a sealing disc 4, a hub 5, a planetary reduction drive assembly 6 and an overspeed limiting assembly 7, wherein the fixed disc 1 is fixedly arranged behind the frame of the electric bicycle, the stator fixing seat 11 is fixedly arranged at the right side of the fixed disc 1, the power shaft 2 for transmitting power is rotatably connected at the center of the fixed disc 1, the support pipe 3 for supporting the device is rotatably connected on the power shaft 2, the support pipe 3 is connected with the frame of the electric bicycle, the sealing disc 4 is rotatably connected on the support pipe 3, the hub 5 is arranged at the left side of the sealing disc 4, the planetary reduction drive assembly 6 is arranged on the support pipe 3, the planetary reduction driving assembly 6 is used for driving the electric bicycle, and the overspeed limiting assembly 7 used for reducing the speed of the electric bicycle is fixedly installed on the left side of the fixed disc 1.

The planetary reduction driving assembly 6 comprises a stator 61 with iron core, a rotor 62, a fixed tripod 63 and a rotating shaft 64, the power gear 65, the transmission gear 66 and the fixed gear ring 67 are fixedly mounted on the stator fixing seat 11, the iron core stator 61 is located in the hub 5, the rotor 62 is fixedly connected to the middle of the power shaft 2, the rotor 62 is located in the iron core stator 61, the iron core stator 61 is used for generating an alternating magnetic field to enable the rotor 62 to rotate, the fixed tripod 63 is fixedly connected to the left end of the support tube 3, the rotating shaft 64 for power transmission is rotatably connected to the fixed tripod 63 in a triangular distribution mode, the power gear 65 is fixedly connected to the power shaft 2, the transmission gear 66 is fixedly connected to the rotating shaft 64, the power gear 65 is meshed with the three transmission gears 66, the fixed gear ring 67 is fixedly connected to the hub 5, the fixed gear ring 67 is meshed with the three transmission gears 66, and the power gear 65, the transmission gear 66 and the fixed gear ring 67 are used for reducing the rotating speed in the power transmission process.

The overspeed limiting assembly 7 comprises a fixed shell 71, a frequency converter 72, a voltage regulating rod 73, a lifting convex rod 74, a compression spring 75, a fixed groove block 76, a centrifugal sliding block 77 and a tension spring I78, the fixed shell 71 is fixedly installed on the left side of the fixed disc 1, the frequency converter 72 is arranged in the fixed shell 71 and used for outputting current, the voltage regulating rod 73 is connected to the frequency converter 72 in a sliding manner and used for changing the power supply frequency, the lifting convex rod 74 is vertically connected to the right side of the frequency converter 72 in a sliding manner and penetrates through the fixed disc 1, the lifting convex rod 74 is contacted with the voltage regulating rod 73, the lifting convex rod 74 is used for pushing the voltage regulating rod 73 to move upwards, the compression spring 75 is connected between the lifting convex rod 74 and the frequency converter 72, the compression spring 75 also penetrates through the fixed disc 1, the fixed groove block 76 is fixedly connected to the middle part of the power shaft 2, the fixed slot block 76 is slidably connected with a centrifugal sliding block 77, the centrifugal sliding block 77 is used for pushing the lifting convex rod 74 to move upwards, and a tension spring 78 is connected between the centrifugal sliding block 77 and the fixed slot block 76.

The frequency converter 72 is connected with the battery jar in the equipment, when the electric bicycle is used, the current in the battery jar of the electric bicycle is transmitted to the coil winding on the iron core stator 61 through the frequency converter 72, the alternating current in the coil winding can generate alternating magnetic flux in the iron core stator 61, the alternating magnetic field in the iron core stator 61 enables the rotor 62 to rotate by means of electromagnetic induction, the rotor 62 drives the power shaft 2 and the upper device to rotate at high speed, the power gear 65 drives the fixed gear ring 67 and the hub 5 to rotate through the transmission gear 66, so that the electric bicycle is driven to move forwards by providing power for the electric bicycle, the number of teeth of the power gear 65, the transmission gear 66 and the fixed gear ring 67 can be known, the rotating speed can be gradually reduced in the process, the rotating speed of the fixed gear ring 67 and the hub 5 is reduced, and the electric bicycle can move in a set value range.

When the rotating speeds of the rotor 62 and the power shaft 2 exceed the preset value in the frequency converter 72, the fixed slot block 76 rotates at a high speed to generate centrifugal force, the centrifugal sliding block 77 moves towards the direction away from the power shaft 2, the fixed slot block 76 drives the centrifugal sliding block 77 to rotate so as to enable the centrifugal sliding block to be in contact with the lifting convex rod 74, the centrifugal sliding block 77 pushes the lifting convex rod 74 to move upwards, the lifting convex rod 74 pushes the voltage adjusting rod 73 to move upwards, the voltage adjusting rod 73 changes the power supply frequency through the frequency converter 72, thereby changing the voltage in the iron core stator 61, further changing the rotating speed of the rotor 62, reducing the rotating speeds of the rotor 62 and the power shaft 2, reducing the rotating speed of the hub 5, reducing the speed of the electric bicycle, and avoiding the driving speed of the electric bicycle from being too high.

After the electric bicycle is decelerated, the stretched tension spring I78 is reset to drive the centrifugal sliding block 77 to move towards the direction close to the power shaft 2, the centrifugal sliding block 77 is not contacted with the lifting convex rod 74 any more, and the compressed compression spring 75 is reset to drive the lifting convex rod 74 and the voltage adjusting rod 73 to move downwards, so that the frequency converter 72 controls the power supply frequency to return to a normal value.

Example 2

On the basis of embodiment 1, as shown in fig. 11 and 12, the electric bicycle further includes a brake assembly 8, the brake assembly 8 is disposed at the rear side of the fixed housing 71, the brake assembly 8 is used for braking the electric bicycle, the brake assembly 8 includes an extension plate 81, a piston cylinder 82, a brake pull rod 83, a piston extrusion rod 84, a piston push rod 85, a brake pad 86 and a tension spring 87, the extension plate 81 is fixedly connected to the rear side of the fixed housing 71, the piston cylinder 82 is disposed on the extension plate 81, the piston cylinder 82 is used for storing piston compression oil, the brake pull rod 83 is slidably connected to the extension plate 81, the brake pull rod 83 is used for pulling the piston extrusion rod 84, the piston extrusion rod 84 is slidably connected to the piston cylinder 82, the piston extrusion rod 84 is fixedly connected to the brake pull rod 83, the piston extrusion rod 84 is used for extruding the piston compression oil in the piston cylinder 82, the piston push rod 85 is slidably connected to the piston cylinder 82, the right side of the piston push rod 85 is fixedly connected with a brake pad 86, the brake pad 86 is used for being in contact friction with the hub 5 to play a braking role, and a tension spring II 87 is connected between the brake pull rod 83 and the rear side of the fixed shell 71.

Piston compression oil is stored in the piston cylinder 82, when a rider presses the brake handle, the brake handle pulls the brake pull rod 83 and the piston extrusion rod 84 to move towards the direction away from the fixed shell 71 through a brake cable, the piston extrusion rod 84 extrudes the piston compression oil in the piston cylinder 82, the piston compression oil pushes the piston push rod 85 and the brake pad 86 to move towards the direction close to the hub 5, and the brake pad 86 and the hub 5 are in contact friction with each other to play a role in braking. When the rider releases the brake handle, the brake cable does not pull the brake pull rod 83 any more, the compressed tension spring II 87 is reset to drive the brake pull rod 83 to move towards the direction close to the fixed shell 71, and the piston compressed oil in the piston cylinder 82 does not apply pressure to the piston push rod 85 any more.

Example 3

On the basis of the embodiment 2, as shown in fig. 13, the hub further comprises a brake deceleration component 9, the fixed housing 71 is provided with the brake deceleration component 9, the brake deceleration component 9 is used for decelerating the rotation speed of the hub 5, the brake deceleration component 9 comprises a connecting convex rod 91, the brake comprises a lifting speed limiting rod 92 and a voltage pause button 93, a connecting convex rod 91 is fixedly connected to the left side of a brake pad 86, the fixed shell 71 is slidably connected with the lifting speed limiting rod 92, the lifting speed limiting rod 92 is in contact with a voltage adjusting rod 73, the lifting speed limiting rod 92 is used for pushing the voltage adjusting rod 73 to move upwards, the lifting speed limiting rod 92 is in contact with the connecting convex rod 91, the connecting convex rod 91 is used for pushing the lifting speed limiting rod 92 to move upwards, the voltage pause button 93 is fixedly installed on the rear side of the fixed shell 71, the connecting convex rod 91 is in contact with the voltage pause button 93 when moving, and the connecting convex rod 91 is used for pressing the voltage pause button 93.

Brake block 86 is towards when being close to the motion of wheel hub 5 direction, brake block 86 can drive and connect protruding pole 91 towards being close to the motion of wheel hub 5 direction, thereby it can promote the ascending motion of lift speed limit pole 92 to connect protruding pole 91, and then lift speed limit pole 92 promotes voltage regulation pole 73 upward movement, make wheel hub 5 slew velocity reduce, avoid wheel hub 5 brake when high-speed rotation to take place the incident, can reduce brake block 86's frequency of use and reduce the degree of wear simultaneously, increase brake block 86 life.

Example 4

In addition to embodiment 3, as shown in fig. 14 and 15, the brake device further includes an internal brake assembly 10, the internal brake assembly 10 is disposed in the fixed disc 1, the internal brake assembly 10 is used for limiting the power shaft 2, the internal brake assembly 10 includes a fixed guide ring 101, a brake arc-shaped magnet block 102, an extrusion spring 103, a movable rod 104 and an electromagnet 105, the fixed disc 1 is fixedly connected with the fixed guide ring 101, the fixed guide ring 101 is symmetrically and slidably connected with the brake arc-shaped magnet block 102, the brake arc-shaped magnet block 102 is in contact with the power shaft 2, the brake arc-shaped magnet block 102 is used for limiting the power shaft 2, the extrusion spring 103 for resetting is connected between the brake arc-shaped magnet block 102 and the fixed guide ring 101, the fixed disc 1 is symmetrically and rotatably connected with the movable rod 104, the movable rod 104 is fixedly connected with the electromagnet 105, the electromagnet 105 is used for pushing the two brake arc-shaped magnet blocks 102 to move relatively, the two electromagnets 105 and the two braking arc-shaped magnet blocks 102 are attracted to each other.

When a rider performs emergency braking, the rider presses the brake handle to the bottom, the brake pad 86 is pulled by the brake cable in an emergency, the connecting convex rod 91 can press the voltage pause button 93, the voltage pause button 93 controls the frequency converter 72 to stop outputting current, the coil winding on the iron core stator 61 loses current, the rotor 62 and the device on the rotor stop rotating, and the hub 5 stops rotating to stop the electric bicycle.

When the device normally operates, the coil winding on the iron core stator 61 can transmit current to the electromagnet 105, the electromagnet 105 is electrified to generate magnetism, the electromagnet 105 generates a magnetic field to be mutually repelled with the braking arc-shaped magnet blocks 102, so that the two braking arc-shaped magnet blocks 102 move relatively, the braking arc-shaped magnet blocks 102 do not clamp the power shaft 2 any more, and the power shaft 2 can smoothly rotate. When the voltage pause button 93 controls the frequency converter 72 to stop outputting current, the coil winding on the iron core stator 61 loses current to enable the electromagnet 105 to be powered off, the electromagnet 105 loses power and loses magnetism, the compressed extrusion spring 103 resets to drive the braking arc-shaped magnet blocks 102 to move oppositely to clamp the power shaft 2, the power shaft 2 and the device on the power shaft are prevented from continuously rotating due to inertia, and the braking effect of the electric bicycle is improved.

Example 5

On the basis of embodiment 4, as shown in fig. 15, the brake device further includes an adjusting assembly 12, the adjusting assembly 12 is fixedly connected to the movable rod 104, the adjusting assembly 12 is used for adjusting the braking arc-shaped magnet block 102, the adjusting assembly 12 includes a fixed spring shifting piece 121 and a rotating handle 122, the movable rod 104 is connected to the fixed spring shifting piece 121, the fixed spring shifting piece 121 is in mutual contact with the fixed disk 1, the fixed spring shifting piece 121 is used for fixing the movable rod 104 by means of friction between the fixed spring shifting piece 121 and the fixed disk 1, and the rotating handle 122 convenient for manual rotation is fixedly connected to the fixed spring shifting piece 121.

When the battery of the electric bicycle is dead, a rider manually rotates the rotating handle 122, the rotating handle 122 drives the fixed spring shifting piece 121 and the upper device thereof to rotate, the electromagnet 105 pushes the two braking arc-shaped magnet blocks 102 to move relatively, the braking arc-shaped magnet blocks 102 no longer limit the power shaft 2, and the rider can drive the bicycle through the pedals.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.