TWM635056U - Electric assisted bicycle - Google Patents

Abstract

The present invention relates to an electric auxiliary bicycle, which includes a frame, a motor body, a first gear box, a second gear box, a battery and a controller. The motor body system is installed near the bottom of the standpipe The first gearbox has a drive shaft and a reduction gear set, the drive shaft is combined with the reduction gear set and connected with the rotor of the motor body, and a transmission shaft is arranged on the reduction gear set, the second The gear box is connected with the drive shaft of the first gear box. The second gear box includes a steering gear set, a five-way spindle and a torque sensor. The steering gear set is connected with the drive shaft with a one-way device. , the torque sensor is arranged between the steering gear set and the bottom bracket axle, the controller is arranged inside the vehicle frame, the battery is arranged in the lower tube of the vehicle frame and is electrically connected with the controller.

Description

electric assist bike

The present invention relates to a bicycle, in particular to an electrically assisted cyclist.

Bicycles have both transportation and sports and leisure functions, so the rider needs to step on the bicycle pedal to advance. However, in some road sections such as climbing, human-driven bicycles often cause considerable physical exertion to the rider. burden, so the existing bicycles driven by electric power can solve the difficulty of driving completely by manpower, so that the bicycle can move forward smoothly on roads such as climbing, and how to install electric equipment such as motors in the limited space of bicycles, It is a very important subject.

Therefore, the author specially developed a new model that can improve existing deficiencies through continuous research and testing in order to improve the existing bicycle structure and problems in use.

The main purpose of the present invention is to provide an electric assisted bicycle, which can achieve the purpose of improving the smoothness and comfort of bicycle riding.

In order to achieve the above-mentioned purpose, the present model mainly provides an electric auxiliary bicycle, which includes a vehicle frame, which includes a standpipe and a lower pipe; a motor body, which is installed near the bottom of the standpipe. The body has a rotor; a first gear box, the first gear box is connected with the motor body, and has a drive shaft and a reduction gear set, the drive shaft is combined with the reduction gear set and connected with the rotor of the motor body connected, and a transmission shaft coaxial with the drive shaft is arranged on the reduction gear set; A second gear box is connected with the drive shaft of the first gear box. The second gear box includes a steering gear set, a five-way spindle and a torque sensor. The steering gear set is connected to the drive shaft in a one-way The bottom bracket shaft is connected with the steering gear set and rotates laterally. The torque sensor is installed between the steering gear set and the bottom bracket shaft to detect the rotational torque of the bottom bracket shaft. and rotating speed; a controller, the controller is arranged inside the vehicle frame, and the controller is electrically connected with the motor body; and a battery, the battery is arranged in the down tube of the vehicle frame and electrically connected with the controller, In order to provide the power source for the action of the controller and the motor body.

Said electric assisted bicycle, wherein the reduction gear set is a planetary gear set with small tooth difference, which includes an eccentric part, two driving parts, an internal tooth part, an upper bracket, a plurality of output rings, and a plurality of fixing parts And the lower bracket, the eccentric part is integrally formed at the bottom end of the drive shaft relative to the drive shaft in an eccentric shape, the two driving parts are ring-shaped on the eccentric part, and the peripheral edges of each driving part are formed with tooth parts, the inner tooth parts are The rings are arranged around the two driving parts, and form an internal tooth part that meshes with the tooth parts of the two driving parts. The upper bracket and the lower bracket are respectively arranged on the upper and lower sides of the two driving parts. Two driving parts, each fixing part runs through the upper bracket and the driving ring and is fixedly combined with the lower bracket, so that the lower bracket can rotate with the driving parts and rotate through the upper bracket and the output ring. bottom of bracket.

In the electric assisted bicycle, the total tooth height of the reduction gear set is 0.6 to 1.5 times the modulus, the difference in the number of teeth is a multiple of 2, and the pressure angle is 12° to 30°.

Wherein, a keyway combined with the rotor of the motor body is recessed on the driving shaft.

In the electric assisted bicycle, the torsion sensor is ring-shaped and arranged around the bottom bracket axle.

In the electric assisted bicycle, the controller is arranged in the standpipe of the frame.

In the electric assisted bicycle, the controller is arranged in an upper tube of the vehicle frame.

In the electric assisted bicycle, the controller is arranged in the down tube of the vehicle frame.

In the electric assisted bicycle, the controller is arranged in a front fork tube of the vehicle frame.

With the above-mentioned technical means, this new model can use the torque sensor to detect the change of the torque of the output shaft, and link the controller to start the motor assembly, so that the motor assembly can be used to provide the rider with auxiliary power, so as to improve the riding quality of the bicycle. The effect of smoothness and comfort.

10: Frame

12: Riser

14: down tube

20: Motor body

22: rotor

30: The first gearbox

32: drive shaft

321: Eccentric part

322: keyway

33: Driving parts

331: teeth

34: Internal gear

341: Internal teeth

35: lower bracket

351: drive shaft

40:Second gearbox

42: one-way device

44: Bottom bracket arbor

46:Torque sensor

50: Controller

60: battery

Fig. 1 is the side view schematic diagram of the present invention.

Fig. 2 is the three-dimensional schematic view of the vehicle frame of the present invention.

Fig. 3 is a perspective view of the new motor.

Fig. 4 is a three-dimensional exploded view of the new motor.

Fig. 5 is an exploded side view of the motor of the present invention.

Fig. 6 is a three-dimensional exploded view of the new reduction gear set.

This new model mainly provides an electric assisted bicycle, please refer to Fig. 1 and Fig. 2, it can be seen from the figure that the electric assisted bicycle of this new type mainly includes a frame 10, a motor body 20, and a first gear box 30 , a second gear box 40, a controller 50 and a battery 60, wherein the structure of the vehicle frame 10 can be roughly the same as that of an existing bicycle, and generally includes a stand pipe 12, a down pipe 14, an upper pipe, a front fork pipe and a rear fork tube, etc., and its detailed structure will not be repeated here.

Please refer to FIG. 3 to FIG. 5 again. The motor body 20 is mounted on the bottom end of the standpipe 12 near the five-way pipe, and a rotor 22 is arranged in the motor body 20 .

This first gearbox 30 is connected with the motor body 20, and has a drive shaft 32 and a reduction gear set, the drive shaft 32 is combined with the reduction gear set and connected with the rotor 22 of the motor body 20, so that the drive The shaft 32 can rotate with the rotor of the motor body 20, wherein a keyway 322 combined with the rotor 22 of the motor body 20 can be recessed on the drive shaft 32, and the speed of the drive shaft 32 can be reduced to Predetermined low speed, a power transmission shaft 351 coaxial with the drive shaft 32 is arranged on the reduction gear set.

Please refer to Fig. 5 and Fig. 6 again, wherein the reduction gear set can be a planetary gear set with a small tooth difference or a harmonic reduction gear set, etc. The present invention takes a planetary gear set with a small tooth difference as an example, which includes a It includes an eccentric part 321, two driving parts 33, an internal tooth part 34, an upper bracket 31, a plurality of output rings 36, a plurality of fixing parts and a lower bracket 35. The eccentric part 321 is eccentrically shaped relative to the drive shaft 32. It is integrally formed on the bottom end of the drive shaft 32, and the two driving parts 33 are ring-mounted on the eccentric part 321, and a tooth part 331 is formed on the periphery of each driving part 33. Preferably, the two driving parts are two planetary gears, and The eccentric part 321 can be provided with two bearings corresponding to the driving parts 33 respectively, so as to improve the smoothness of the transmission between the eccentric part 321 and the driving part 33. The inner tooth part 34 is arranged around the two driving parts 33, And form an internal tooth portion 341 meshed with the tooth portion 331 of the two driving parts 33, wherein the internal tooth portion 34 can be integrally formed on the casing of the first gear box 30, or be fixed on the first gear box as an independent component. Inside the box body of the gear box 30, the upper bracket 31 and the lower bracket 35 are respectively arranged on the upper and lower sides of the two driving parts 33, and each output ring 36 runs through the two driving parts 33, and each fixing part runs through the upper bracket 31 respectively. And the output ring 36 and fixedly combined with the lower bracket 35, so that the lower bracket 35 can rotate with the driving part 33 and rotate through the transmission of the upper bracket 31 and the output ring 36, wherein each driving part 33 can be respectively provided with a ring for output. The ring 36 runs through a through hole whose diameter is larger than that of the output ring 36 , and the drive shaft 351 protrudes from the bottom of the lower bracket 35 .

In this way, when the rotor 22 of the motor body 20 drives the driving shaft 32 to rotate, and the two driving parts 33 engage with the internal tooth part 341 of the internal tooth part 34 through the tooth part 331, the two driving parts 33 can be integrally formed on the driving shaft 32 The eccentric portion 321 at the bottom rotates and yaws, so when the two driving parts 33 are deflected, they can be moved through the upper support. Frame 31, each output ring 36 and fixing parts drive the lower bracket 35 to rotate, and then make the transmission shaft 351 rotate, and achieve the effect of deceleration. In addition, the full tooth height of the reduction gear set can be 0.6 to 1.5 times the modulus. The difference in the number of teeth is a multiple of 2, and the pressure angle can be from 12° to 30°, among which 30° is preferred.

The second gear box 40 is connected with the first gear box 30, and the second gear box 40 includes a steering gear set, a five-way spindle 44 and a torque sensor 46, and the steering gear set is connected to the transmission shaft 351 with a The one-way device 42 is connected, and connects the five-way spindle 44 of horizontal rotation, in order to turn the rotation axis of transmission shaft 351 to the horizontal five-way spindle 44, and utilizes this five-way spindle 44 to connect and drive two Pedals, to provide bicycle riders with auxiliary riding power, wherein the steering gear set can be a bevel gear set or a face gear set, and its detailed structure will not be described here. The torque sensor 46 is arranged on the steering gear set Between the bottom bracket spindle 44 , the torque sensor 46 can be ring-shaped and set around the bottom bracket spindle 44 , so as to detect the rotational torque and rotational speed of the bottom bracket spindle 44 .

The controller 50 is arranged inside the vehicle frame 10, and it can be arranged on the standpipe 12, the upper pipe, the lower pipe 14 or the front fork pipe. and the torque sensor 46 are electrically connected, and the battery 60 is arranged in the lower tube 14 of the vehicle frame 10 and is electrically connected with the controller 50 so as to provide a power source for the motor body 20 to operate.

Thereby, when the bicycle is ridden on a general plane or a downhill section, because the rider does not need to exert too much effort on the pedals, the rotational torque transmitted from the pedals to the bottom bracket axle 44 will not be too large At this time, the torque sensor 46 will not start the motor body 20, and the motor body 20 will not provide auxiliary power temporarily, and when the bicycle is riding on a more strenuous section such as an uphill, the rider will apply more power to the pedals , so the pedals will cause a larger rotational torque of the bottom bracket 44. At this time, when the torque sensor 46 detects that the rotation torque of the bottom bracket 44 exceeds a predetermined value, the controller 50 will be linked to start the motor. The main body 20 drives the drive shaft 32 to rotate, and drives the bottom bracket spindle 44 to rotate through the reduction gear set of the first gear box 30 and the steering gear set of the second gear box 40 to assist the rotation of the pedals, thereby An electric auxiliary power is provided to the pedals to assist the bicycle to move forward smoothly on strenuous roads such as uphill.

Therefore, the present invention can use the rider's own power to ride on ordinary road sections, and when encountering strenuous road sections such as uphill, the torque sensor 46 can be used to detect the change of the torque of the bottom bracket shaft 44 to start the motor. The main body 20 is to use the motor main body 20 to provide auxiliary power for the rider, so as to improve the smoothness and comfort of riding the bicycle.

In addition, the present invention is connected with the motor body 20 through the drive shaft 32 on the first gear box 30, and the transmission shaft 351 on the first gear box 30 is connected with the second gear box 40 through a one-way device 42, so The motor body, the first gear box 30 and the second gear box 40 can be manufactured and assembled in a modular manner, which can greatly improve the efficiency of assembling the motor body 20, the first gear box 30 and the second gear box 40 on the vehicle frame 10. Convenience, thereby reducing the overall manufacturing and assembly costs of the electric assist vehicle.

10: Frame

12: Riser

14: down tube

20: Motor body

50: Controller

Claims (13)

An electrically assisted bicycle comprising: A frame, which includes a riser and a lower tube; A motor body, the motor body system is installed near the bottom end of the standpipe, and the motor body has a rotor; A first gear box, the first gear box is connected with the motor body, and has a drive shaft and a reduction gear set, the drive shaft system is combined with the reduction gear set and connected with the rotor of the motor body, and A transmission shaft coaxial with the drive shaft is arranged on the reduction gear set; A second gear box is connected with the drive shaft of the first gear box. The second gear box includes a steering gear set, a five-way spindle and a torque sensor. The steering gear set is connected to the drive shaft in a one-way The bottom bracket shaft is connected with the steering gear set and rotates laterally. The torque sensor is installed between the steering gear set and the bottom bracket shaft to detect the rotational torque of the bottom bracket shaft. and speed; a controller, the controller is arranged inside the frame, and the controller is electrically connected to the motor body; and A battery is arranged in the lower tube of the vehicle frame and is electrically connected with the controller so as to provide a power source for the controller and the motor body to operate. The electric assisted bicycle as described in Claim 1, wherein the reduction gear set is a planetary gear set with a small tooth difference, which includes an eccentric part, two driving parts, an internal tooth part, an upper bracket, a plurality of output rings, A plurality of fixing parts and a lower bracket, the eccentric part is integrally formed at the bottom end of the driving shaft in an eccentric shape relative to the driving shaft, the two driving parts are ring-shaped on the eccentric part, and a tooth part is formed on the periphery of each driving part. The inner gear rings are arranged around the two driving parts, and form an inner tooth part meshing with the teeth of the two driving parts. The upper bracket and the lower bracket are respectively arranged on the upper and lower sides of the two driving parts. Each output ring It is set through the two driving parts, and each fixing part is respectively penetrated through the upper bracket and the driving ring and fixedly combined with the lower bracket, so that the lower bracket can rotate with the driving part and rotate through the upper bracket and the output ring. It protrudes from the bottom of the lower bracket. The electric assisted bicycle as described in Claim 2, wherein the total tooth height of the reduction gear set is 0.6 to 1.5 times the modulus, the tooth number difference is a multiple of 2, and the pressure angle is 12° to 30°. The electric assisted bicycle as described in claim 2, wherein a keyway combined with the rotor of the motor body is recessed on the drive shaft. The electric assisted bicycle according to any one of claims 1 to 4, wherein the torque sensor is ring-shaped and arranged around the bottom bracket axle. The electric assist bicycle as described in claim 5, wherein the controller is installed in the seat pipe of the frame. The electric assist bicycle as described in claim 5, wherein the controller is arranged in an upper tube of the vehicle frame. The electric assist bicycle as described in claim 5, wherein the controller is arranged in the down tube of the vehicle frame. The electric assist bicycle as described in claim 5, wherein the controller is arranged in a front fork tube of the vehicle frame. The electric assisted bicycle according to any one of claims 1 to 4, wherein the controller is arranged in the stand pipe of the frame. The electric assist bicycle according to any one of claims 1 to 4, wherein the controller is arranged in an upper tube of the vehicle frame. The electric assist bicycle according to any one of claims 1 to 4, wherein the controller is arranged in the down tube of the vehicle frame. The electric assisted bicycle according to any one of claims 1 to 4, wherein the controller is arranged in a front fork tube of the vehicle frame.

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