TWI646016B - A bicycle drive unit - Google Patents

Abstract

The invention relates to an electric assist bicycle driving device, which comprises a motor with a hollow inner shaft as a hollow shaft, a star-shaped gear train transmission unit on the right side of the motor, a bicycle crank shaft and a crank on both sides suspended through the hollow shaft of the inner rotor. The bicycle large toothed disc, a sensing member, and an arc-shaped adapter member for replacing the bicycle five-way, the outer arc is welded with the bicycle lower tube and the seat tube, and the inner arc is screwed to the device. The crankshaft is a pedal shaft, and the central hollow shaft of the planetary bracket is a motor power output shaft, and each of the different one-way one-way clutches is interlocked, and the interaction is a master shaft and a driven shaft, so that the pedal and the motor power are separately actuated, and the crankshaft is respectively actuated. (Pedal axis) and a plurality of magnetic poles connected thereto are control units for starting the motor or de-energizing the motor.

Description

Electric assist bicycle drive

The invention relates to an electric assist bicycle driving device, which provides a bicycle electric power driving device which is simpler in power output, more compact and light in components, and more stable in center of gravity.

The conventional electric assist bicycle, which was first mounted on the frame with a motor as a chain link, is currently equipped with a motor front or rear hub motor in the front or rear wheel hub, and a motor at the hub side. Wheel motor. More advanced ones have a device that connects the crankshaft at the bicycle five-way, and the motor is placed in the lower or middle tube to connect the crankshaft. The advanced ones such as the Republic of China patent II523794 electric bicycle hybrid drive: the sun wheel is connected by a pedal crank, the motor is connected to the planet carrier, and the power input end is the power output end, the ring gear is connected to the chain as the power output end, the maximum output is in the outermost ring, and the center of gravity is less. Stability; I473745 bicycle drive unit: the motor is assembled on one side of the structure, the speed reduction mechanism is assembled on the other side of the structure, and the outer rotor rotates, the mechanism is large and the center of gravity is unbalanced; the latter is like the I426035 clutch bicycle power drive and its clutch type Driver: The motor is installed in the seat tube or the lower tube. There is heat dissipation problem. The motor is above the five-way crankshaft and the center of gravity is high. Between the vertical input shaft and the horizontal output shaft, an umbrella-type transmission mechanism is installed to increase the load of the vehicle.

Electric assist bicycles, in addition to being used as mass transit vehicles, are also sports, leisure, and transportation tools for those who are older and weaker; simple, lightweight, and easy to quantify as the focus of demand, the above-mentioned known electric bicycles of various types The driving device is still insufficient in the volume, the assembly and the center of gravity; the invention is centered on the crankshaft, the center of gravity is stable, and the riding stability is increased; the star-shaped gear train transmission unit with the motor linkage enables the driving device to be less The components are composed, the structure is simple, the mass production is facilitated and the cost is reduced, and the electric assist bicycle becomes a popular sports and leisure vehicle; and the conventional one-way clutch component is used as the output of the configuration pedal and the motor power, and the interaction is the active shaft and the slave. The moving shaft allows the pedal to be separately actuated from the motor power, and the crankshaft (the pedal shaft) and the connected sensing member are the control unit for starting the motor or de-energizing the motor, and enjoy the riding pleasure. The invention relates to an electric assist bicycle driving device, which comprises a motor with an inner rotor as a hollow shaft and a right side of a motor. Gear transmission unit, a bicycle crankshaft and two side cranks suspended by the hollow shaft of the inner rotor, a bicycle large toothed disc, a sensing member, and an arc-shaped adapter member replacing the bicycle five-way, the outer arc In order to be welded with the bicycle lower tube and the seat tube, the inner arc is screwed to the device. The crankshaft is a pedal shaft, and the central hollow shaft of the planetary bracket in the star gear train is a motor power output shaft; the right side of the crankshaft has an annular buckle ring, and the central hollow shaft of the planetary bracket is respectively fixed on the outer side of the large toothed disc and One-way clutch on the inner side, interacting with the active shaft and the driven shaft, allowing the foot The stepping and the motor power are respectively actuated, and the crankshaft (foot shaft) and the plurality of magnetic poles connected thereto are control units for starting the motor or de-energizing the motor.

The motor is axially fixed on the right side of the star-shaped gear train. The left side of the hollow shaft of the inner rotor of the motor has no gear structure. The left side of the hollow shaft of the inner rotor is fixed on the central hole of the bearing on the central perforation of the left outer cover of the motor; the right end of the inner rotor of the motor is external. The gear structure is a sun gear of a star-shaped gear train. When the ring gear is fixed, the sun gear is linked with a plurality of planetary gears of the star gear system, and at the same time, the central hollow shaft of the planetary carrier is decelerated in the same direction, and the central hollow shaft of the planetary carrier The motor power output shaft; the central hollow shaft of the planetary bracket is unidirectionally coupled to the one-way clutch fixed on the inner side of the bicycle large gear; the right and left ends of the crank shaft are respectively fixed to the bicycle crank, and the crank shaft is interlocked when the crank is cranked, the crank shaft After the crankshaft is suspended through the hollow shaft of the inner rotor, the right side of the crankshaft is then consolidated through the central hole of the inner hollow shaft bearing of the coaxial planet carrier, and then fixed through the annular buckle ring. The buckle is connected to the one-way clutch fixed on the outer side of the bicycle large toothed disc, and the large toothed disc is unidirectionally coupled; the crank shaft is consolidated and passed through the annular buckle, and the right end is consolidated from the right end. The right crank of the vehicle; the left side of the crankshaft is fixed through the center hole of the inner bore of the base of the sensing member, and then consolidated through the central perforation of the disc having a plurality of magnetic poles and suspended through the central perforation of the cap, left end The left crank of the bicycle is further consolidated; a plurality of magnetic pole induction sensing coils drive the plurality of magnetic poles to rotate or stop when the crankshaft is rotated or stopped, and the sensing coil is sensed to control the starting and powering of the motor. The invention is centered on the crankshaft, the center of gravity is stable, and the stability of riding and riding is increased; meanwhile, the star gear train transmission list The utility model can make the driving device be composed of fewer components, has a simple structure, is advantageous for mass production and reduces cost, and makes the electric assist bicycle become a popular sports and leisure vehicle.

The crankshaft is a pedal shaft, the central hollow shaft of the planetary bracket is a motor power output shaft, and each of the different one-way clutches is connected in the same direction; the crankshaft annular buckle is interlocked with the one-way clutch fixed to the outside of the large toothed disc; the planetary bracket The central hollow shaft is interlocked with the one-way clutch fixed to the inner side of the large toothed disc; when the pedal-driven bicycle advances clockwise, the crank shaft is the driving shaft, and the annular buckle is interlocked with the one-way clutch fixed to the outside of the large toothed disc. Pushing the needle in the one-way clutch to make it fit, and driving the large toothed disc to rotate in the same direction, and at the same time driving the chain to rotate in the same direction to advance the vehicle; at this time, the central hollow shaft of the planetary bracket is the driven shaft, and is consolidated. The needle in the one-way clutch in the same direction inside the large toothed disc is pushed apart, in a separated state, without interlocking, there is no possibility that the motor is towed, and the foot load is increased, and the riding can be started briskly; after the vehicle is started a plurality of magnetic poles rotate along the crank shaft, and the sensing coils are fixed on the sensing coil of the sensing member to start the motor power output; after the motor rotates, the inner rotor hollow shaft sun gear is linked to the star gear system The star wheel and the central hollow shaft of the planetary bracket at the same time become the driving shaft, and the one-way clutch fixed on the inner side of the large toothed disc is pushed to push the needle in the one-way clutch to make the large toothed disc rotate. At the same time, the chain is driven to rotate in the same direction to advance the vehicle; at this time, the crankshaft is a driven shaft, and the needle is fixed in the one-way clutch in the same direction on the outer side of the large toothed disc, and is separated, and the crank of the pedal is in a state of separation. Free state, no There are cases where the feet are dragged and rotated; when the pedal riding is continued, the motor power is continuously output, which achieves the function of assisting riding; when the foot stops stepping, the plurality of magnetic poles on the crankshaft do not sense the sensing coil, The motor is powered off and the power output is stopped. The invention adopts a conventional one-way clutch element as an output for configuring the pedal and the motor power, and the crank shaft (the pedal shaft) and the plurality of magnetic poles connected thereto are the control unit for starting the motor or de-energizing the motor, and more preferably Enjoy the fun of riding.

Instead of the bicycle five-way arc type adapter member, the outer arc can be welded with the bicycle lower tube and the seat tube, and the inner arc can be screwed with the device.

A‧‧‧Motor

A1‧‧‧ inner rotor hollow shaft

A2‧‧‧Outer coil stator

A3‧‧‧Motor housing

A41‧‧‧Right cover

A411‧‧‧Central Perforation

A412‧‧‧ bearing

A413‧‧‧Center hole

A42‧‧‧ left cover

A421‧‧‧Central Perforation

A422‧‧‧ bearing

A423‧‧‧Center hole

1‧‧‧ crankshaft

11‧‧‧Right crank

12‧‧‧ Left crank

13‧‧‧Actual buckle

2‧‧‧Spindle

20‧‧‧Central Perforation

21‧‧‧First one-way clutch

211‧‧‧needle needle

22‧‧‧Second one-way clutch

221‧‧‧needle needle

3‧‧‧Sensing components

30‧‧‧Base

301‧‧‧Central Perforation

302‧‧‧ bearing

303‧‧‧ center hole

31‧‧‧ disc

311‧‧‧Central Perforation

32‧‧‧Cap

321‧‧‧Central Perforation

33‧‧‧Multiple magnetic poles

34‧‧‧Sensor coil

B‧‧‧Star Gear System

B11‧‧‧ star gear system cover

B111‧‧‧Central Perforation

B112‧‧‧ bearing

B113‧‧‧ center hole

B12‧‧‧ planetary gear

B13‧‧‧ Planetary bracket

B131‧‧‧Central hollow shaft

B132‧‧‧ Bearing

B133‧‧‧Center hole

B14‧‧‧ ring gear

B141‧‧‧Ring gear housing

B15‧‧‧Sun Wheel

The first figure is a schematic exploded perspective view of a first embodiment of the present invention.

The second figure is a detailed exploded perspective view of the first embodiment of the present invention.

The third figure is a cross-sectional view of the first embodiment of the present invention.

FIG. 4 is an axial cross-sectional view showing the operation of the one-way clutch and the large toothed disc when the crankshaft is the driving shaft when the foot is stepped according to the first embodiment of the present invention, mainly showing that the crankshaft is the driving shaft and the one-way clutch is tightly fitted. The state of action.

The fifth figure is the first embodiment of the present invention, the crank shaft is the driving shaft, the central hollow shaft of the planetary bracket is the driven shaft, the central hollow shaft of the planetary bracket and the one-way clutch are axially cut, mainly showing the one-way clutch. Actuated in a state of separation from the central hollow shaft of the planet carrier.

FIG. 6 is an axial cross-sectional view showing the central hollow shaft of the planetary carrier rotating, the central hollow shaft of the planetary carrier being the driving shaft, and the one-way clutch and the large toothed disc, which mainly shows the center of the planetary bracket, when the motor is started according to the first embodiment of the present invention. The hollow shaft and the one-way clutch are in a state of being in a tight state.

7 is an axial cross-sectional view showing the planetary carrier as the driving shaft, the crank shaft being the driven shaft, and the crank shaft and the one-way clutch being actuated when the motor is started according to the first embodiment of the present invention, showing that the one-way clutch and the crankshaft are separated. Actuate the situation.

The following embodiments are used to illustrate the structure and function of the present invention in view of the drawings.

Referring to Figures 1 to 3, the present invention relates to an electric assist bicycle driving device comprising a motor A having an inner rotor as a hollow shaft, and a star-shaped gear train B driving unit on the right side of the motor A, suspended through the inner rotor hollow The bicycle crankshaft 1 of the shaft A1 and the cranks 11 and 12 on both sides, a bicycle large toothed disc 2, a sensing member 3, and an arc-shaped adapter member C (not shown) replacing the bicycle five-way, the outer arc In order to be welded with the bicycle lower tube and the seat tube, the inner arc is screwed to the device. The crankshaft 1 is a pedal shaft, the central hollow shaft B131 of the planetary carrier B13 in the star gear train B is a motor A power output shaft, the crankshaft 1 has an annular buckle 13 on the right side, and the central hollow shaft B131 of the planetary bracket B13 respectively Through the one-way clutches 21 and 22 fixed to the outer side and the inner side of the large toothed disc 2, the interaction is the active shaft and the driven shaft, and the pedal and the horse A power are respectively actuated, and the crank shaft 1 (foot shaft) and The plurality of magnetic poles 33 on the associated disc are control units for starting the motor A or deactivating the motor A.

Motor A axially fixed star gear system B transmission unit, motor A inner rotor hollow shaft A1 left end gearless structure, inner rotor hollow shaft A1 left end is fixed to motor A left outer cover A42 central perforation A421 on the center of bearing A422 Inside the hole A423; the right end of the inner rotor hollow shaft A1 of the motor A is an external gear structure, which is a sun gear B15 of the star gear system B. When the ring gear B14 is fixed, the sun gear B15 links a plurality of planets of the star gear system B. Wheel B12, simultaneously interlocking the planet The central hollow shaft B131 of the bracket B13 is decelerated and rotated in the same direction, the central hollow shaft B131 of the planetary bracket B13 is the motor A power output shaft; the central hollow shaft B131 of the planetary bracket B13 is unidirectionally coupled to the second one-way clutch fixed inside the bicycle large chain gear 2 twenty two.

The right and left ends of the crankshaft 1 respectively fix the bicycle cranks 11, 12, the crankshafts 11 and 12 are connected to the crankshaft 1, and the crankshaft 1 is the pedal axle; after the crankshaft 1 is suspended through the inner rotor hollow shaft A1, The right side of the crankshaft 1 is then consolidated through the central hole B133 of the bearing B132 in the central hollow shaft B131 of the coaxial planet carrier B13, and then fixed through the annular buckle 13 and the annular buckle 13 is further coupled to the bicycle. The first one-way clutch 21 on the outer side of the toothed disc 2 unidirectionally interlocks the large toothed disc 2; after the crankshaft 1 is fixed through the annular buckle 13 , the right end of the bicycle is fixed to the left crank 11; the left side of the crank shaft 1 is consolidated After passing through the central hole 303 of the bearing 302 in the central through hole 301 of the base 30 of the sensing member 3, the central through hole 311 of the disk 31 having a plurality of magnetic poles 33 is fixed and suspended through the central through hole 321 of the cap 32. The left end re-consolidates the bicycle left crank 12; the plurality of magnetic poles 33 sense the sensing coil 34, and when the crank shaft 1 is rotated or stopped, the plurality of magnetic poles 33 on the disc 31 are rotated or stopped, and the sensing coil 34 is sensed. Control motor A to start and power off.

Please refer to the second, third and fifth to seventh diagrams; the right and left ends of the crankshaft 1 respectively fix the bicycle cranks 11, 12, the crankshaft 1 is interlocked when the cranks 11 and 12 are stepped, and the crankshaft 1 is the pedal axle; The central hollow shaft B131 of the planetary bracket B13 is a power output shaft of the motor A, and each of the different one-way clutches is connected in the same direction; the annular buckle 13 of the crankshaft 1 is interlocked with the first one-way clutch 21 fixed to the outer side of the large toothed disc 2, song After the arbor 1 is fixed through the annular buckle 13 , the right end of the crankshaft 1 is re-consolidated; the left side of the crankshaft 1 is fixed through the central hole 303 of the bearing 302 in the central through hole 301 of the base 30 of the sensing member 3; After re-consolidating through the central perforation 311 of the disc 31 having a plurality of magnetic poles 33 and floating through the central perforation 321 of the cap 32, the left end re-consolidates the bicycle left crank 12; when the foot drives the bicycle to advance clockwise, the crank The shaft 1 is a driving shaft, and the first one-way clutch 21 fixed to the outside of the large toothed disc 2 is interlocked, and the needle roller 211 of the first one-way clutch 21 is pushed to be in a tight state, and the large toothed disc 2 is driven to rotate. At the same time, the chain is rotated in the same direction to advance the vehicle; at this time, the central hollow shaft B131 of the planetary bracket B13 is a driven shaft, and when the second one-way clutch 22 that is fixed in the same direction inside the large toothed disc 2 rotates clockwise, When the central hollow shaft B131 of the planetary bracket B13 is driven, the needle 221 of the second one-way clutch 22 fixed inside the large toothed disc 2 is pushed counterclockwise to be separated, without interlocking the planetary bracket. B13's central hollow shaft B131, without the motor, there will be no motor A Dragging the situation, and increasing the load on the foot, you can start riding easily.

After the vehicle is started, the plurality of magnetic poles 33 on the disc 31 of the sensing member 3 rotate along with the crank shaft 1 to inductively fix the sensing coil 34 on the cap 32 of the sensing member 3 to start the motor A power output; After the motor A rotates, the right inner sun shaft B15 of the inner rotor hollow shaft A1 is linked with the planetary gear B12 of the star gear system B, and the central hollow shaft B131 of the planetary bracket B13 that is interlocked becomes the driving shaft, and is interlocked and fixed on the inner side of the large toothed disc 2 The two-way clutch 22 pushes the needle roller 221 in the second one-way clutch 22 to rotate in the same direction, so as to be in a tight state, and the large toothed disc 2 is driven. Rotating, at the same time, driving the chain to rotate in the same direction to advance the vehicle; at this time, the crank shaft 1 is a driven shaft, and the first one-way clutch 21, which is fixed to the outside of the large toothed disc 2, rotates clockwise, on the crank shaft 1 In the case of the slave, the needle 211 in the first one-way clutch 21 that is fixed to the outside of the large toothed disc 2 is pushed away in the counterclockwise direction, and is in a disengaged state, and the cranks 11 and 12 of the foot are in a free state. There will be no situation in which both feet are dragged and rotated; when the pedaling is continued, the motor A power is continuously outputted to achieve the effect of assisting riding; when the foot stops stepping, the sensing member 3 is on the disk 31 The plurality of magnetic poles 33 do not sense the sensing coil 34, and the motor A is powered off to stop the power output.

Please refer to the second, third and fourth figures, and further describe the technical features and actions of the present invention as follows: The present invention relates to an electric assist bicycle driving device comprising a motor A having an inner rotor as a hollow shaft, wherein the inner rotor hollow shaft A1 The right end is an external gear structure, the gear structure becomes the sun gear B15 of the star gear system B; the motor outer coil stator A2 is fixed in the motor casing A3, and the outer coil stator A2 is electrically connected to the controller (not shown in the figure) The motor A has a right outer cover A41, the right outer cover A41 has a central perforation A411, a central through hole A411 is fixed with a bearing A412, the left outer cover A42 has a central perforation A421, and a central through hole A421 is fixed with a bearing A422. The sun gear B15 of the right outer gear structure of the inner rotor hollow shaft A1 is fixed to the center hole A413 of the bearing A412 of the right outer cover A41 of the motor A, and is interlocked with the planetary gear B12 of the star gear train B; the inner rotor hollow shaft A1 The left end has no gear structure, and the left side of the inner rotor hollow shaft A1 is fixed to the left of the motor A. The cover A42 is centrally perforated in the central hole A423 of the bearing A422 on the A421.

A motor A has a star-shaped gear train B drive unit and is separated from the motor cover A41. The star gear system B has a right outer cover B11, a plurality of planetary wheels B12, a planetary support B13 connecting a plurality of planetary wheels B12, and a ring. The gear B14 and its outer casing B141, and the right end of the inner rotor hollow shaft A1 are the outer gear structure sun gear B15.

The star gear system cover B11 has a central perforation B111 coaxial with the crankshaft 1, and a bearing B112 is fixed on the perforation; the central support B13 has a central hollow shaft B131 coaxial with the crankshaft 1 and a central hollow shaft B131. After passing through the central hole B113 of the bearing B112 in the central perforation B111 of the star gear system cover B11, the second one-way clutch 22 fixed to the inner side of the bicycle large toothed disc 2 is unidirectionally coupled to the bicycle large toothed disc 2; Motor A inner rotor hollow shaft A1 right end outer gear structure sun wheel B15 linked to the planet carrier B13 central hollow shaft B131 is the motor A power output shaft.

The motor A and the right star gear system B are devices that can be screwed into each other: the motor A outer coil stator A2 is fixed in the motor casing A3, and the right outer cover A41 of the motor A is between the star gear train B and the star gear train B. The partition plate; the outer casing B141 and the outer cover B11 of the star-shaped gear train B-ring gear B14 and the motor casing A3 and the right and left outer covers A41 and A42 are devices that can be screwed to each other.

A bicycle crankshaft 1, the right and left ends of the crankshaft 1 respectively fix the bicycle cranks 11, 12, the crankshafts 11 and 12 are linked to the crankshaft 1, the crankshaft 1 is the pedal axle, and the crankshaft 1 is suspended on both sides. Through the motor A inner rotor hollow shaft A1; crank The right side of the shaft 1 is fixed and passed through the central hole B133 of the bearing B132 which is pivotally disposed in the central hollow shaft B131 of the planetary carrier B13, and then is fixed through the annular buckle 13 and the annular buckle 13 is interlocked and fixed on the bicycle teeth. The first one-way clutch 21 on the outer side of the disk 2 unidirectionally interlocks the large toothed disc 2, and after the crankshaft 1 is fixed through the annular buckle 13 , the right end of the bicycle is fixed to the left crank 11; the left side of the crankshaft 1 is fixedly worn. After passing through the central hole 303 of the bearing 302 in the central through hole 301 of the base 30 of the sensing member 3, the central through hole 311 of the disk 31 having a plurality of magnetic poles 33 is fixed and suspended through the central through hole 321 of the cap 32. Re-consolidate the bicycle left crank 12.

A bicycle large toothed disc 2 is disposed on the right side of the star gear train B transmission unit, the outer edge of the large toothed disc 2 is toothed to connect the chain, and the center has a central perforation 20 coaxial with the crank shaft 1 and the aperture is slightly smaller than the fixed The first and second one-way clutches 21, 22 on the outer and inner sides are larger than the outer diameter of the crankshaft 1; the outer side of the large-toothed disc 2 is fixed to the first one of the crankshaft 1 annular buckle 13 To the clutch 21, the second one-way clutch 22, which is interlocked with the central hollow shaft B131 of the right planet carrier B13, is fixed inside the large toothed disc 2.

a sensing member 3, the sensing member 3 is coaxial with the crankshaft 1, and includes a base 30, a disk 31 having a plurality of magnetic poles 33, and a cap 32 having a sensing coil 34; a central through hole 301, a bearing 302 is fixed in the hole, and a bearing hole 302 has a center hole 303 for the left side of the crank shaft 1 to be fixed; the base 30 is fixed to the outside of the left outer cover A42 of the motor A, and a circle is arranged outside the base 30. The disk 31 has a central through hole 311 for the crankshaft 1 to be fixedly passed through, and a plurality of magnetic poles 33 are disposed on the outer edge of the disk 31 in conjunction with the crankshaft 1; a cap 32 is provided on the outer side of the disk 31, and the cap is closed. 32 has a central through hole 321 for the crankshaft 1 to be suspended, the cap 32 has 1 to 3 sensing coils corresponding to the plurality of magnetic poles 33, and the outer edge of the cap 32 can be closely adhered to the outer edge of the base 30; a plurality of magnetic poles The inductive sensing coil 34 drives the plurality of magnetic poles 33 on the disc to rotate or stop when the crankshaft 1 is rotated or stopped, and the sensing coil 34 is sensed to control the starting and de-energizing of the motor A.

Instead of the bicycle five-way arc type adapter member C (not shown), the outer arc is welded to the bicycle lower tube and the seat tube, and the inner arc is screwed to the device.

Claims (1)

An electric assist bicycle driving device comprising a motor with a hollow inner shaft as a hollow shaft, a star-shaped gear train transmission unit on the right side of the motor, a bicycle crank shaft that suspends axially through the hollow shaft of the inner rotor, and a bicycle large toothed disc; The right end of the hollow shaft of the inner rotor of the motor is an external gear structure, which is a sun gear of the star gear system. When the ring gear is fixed, the sun gear links a plurality of planetary gears of the star gear train, and simultaneously interlocks the central hollow of the planetary carrier. The shaft rotates in the same direction, and the central hollow shaft of the planetary carrier is coupled to the second one-way clutch fixed on the inner side of the bicycle large gear, and the bicycle large gear is unidirectionally coupled; the crank shaft is suspended through the inner rotor hollow shaft After the right side is re-consolidated through the central hole of the inner hollow shaft bearing of the planetary bracket of the concentric core, the annular buckle is fixed, and the annular buckle is interlocked and fixed on the outer side of the bicycle large toothed disc. The clutch unidirectionally interlocks the large chainring.