TWM614076U - Torque sensing device of electrically assisted bicycle - Google Patents

Abstract

The model relates to a torsion sensing device for an electric bicycle, which includes a torsion sensor which is attached to a connecting sleeve provided on a large chainring of the vehicle body, and the connecting sleeve is then provided with At one end of a bottom bracket shaft, it is used to sense the input torque of the pedal; a speed sensor is attached to the car body to sense the speed of the bottom bracket shaft; a circuit board, It is installed on the vehicle body to provide electrical connection or coupling to the torque sensors and speed sensors, and output the sensed torque and speed signals to the outside; by the controller of the electric bicycle Receive the torque and rotational speed signals output from the circuit board as a control to control the output of the motor.

Description

Torque sensing device for electric bicycle

The present invention relates to the field of bicycles, in particular to the technical category of input torque sensing devices for electric-assisted bicycles.

For the needs of environmental protection and ease and comfort of riding, there are many different electric bicycles on the market. The electric bicycle system can be divided into front wheel, rear wheel and center system according to the position of the electric motor. The motor can provide appropriate auxiliary torque at any time, and the torque sensing device is a very important device for electric bicycles.

There are many different torque sensors. Most of them are pedal crankshafts, pedals, pedal rods, rear axles, and front chainrings that install sensors on electric bicycles. , Chain or rear frame.

However, these torsion sensing devices often have some of the following deficiencies, such as: resulting in a complex structure of the frame that is not easy to assemble, unstable torsion signals, and susceptibility to external force interference. Therefore, it is often inconvenient in actual use and the torque control is not accurate.

In view of this, in view of the above-mentioned problems with the torque sensing devices on the existing electric bicycles, the creator of the present invention has worked hard to develop the new electric bicycle torque sensing devices, so the main purpose of the present invention is to provide: A torsion sensing device for electric bicycles that is easier to assemble and can reduce assembly costs; the secondary purpose of the present model is: a torsion sensing device for electric bicycles with wide applicability; another purpose of the present invention is to: provide A torsion sensing device for electric bicycles with more accurate torque control.

In order to achieve the above-mentioned purpose, the new model uses the following technical means: A torque sensing device for electric bicycles, which includes: a torque sensor attached to a connecting sleeve provided on a large chainring of the car body , And the connecting sleeve is connected to one end of a bottom bracket shaft to sense the input torque of the pedal; a speed sensor is connected to the car body to sense the bottom bracket The rotational speed of the shaft; a circuit board is attached to the car body to provide electrical connection or coupling to the plurality of torque sensors and rotational speed sensors to output the sensed torque and rotational speed signals to the outside ; The electric bicycle controller receives the torque and speed signals output by the circuit board as a control to control the motor output.

The torque sensor further includes a plurality of strain gauges and a signal processing circuit board, wherein the plurality of strain gauges are attached to the connecting sleeve, and the signal processing circuit board is attached to the inner one. On the cover body, the inner cover body is further assembled on the connecting sleeve.

The rotational speed sensor further includes a Hall IC device and a multi-pole magnetic ring, wherein the multi-pole magnetic ring is connected to the inner cover, and the Hall IC device is connected to the circuit board, The circuit board is then connected to an outer cover body on a five-way tube provided on the vehicle body, and the outer cover body corresponds to the inner cover body, so that the Hall IC device corresponds to a multi-pole magnetic ring.

The torque sensor is set as a multi-pole magnetic ring and is connected to a magnetizing block of the connecting sleeve, and the circuit board is connected to a box body, and the box body is further The knot is set on a five-way pipe set in the car body.

The circuit board is an integrated circuit board, and the integrated circuit board is provided with a magnetic induction coil and a Hall IC device, and both the magnetic induction coil and the Hall IC device correspond to the multi-pole magnetic ring.

The circuit board is configured to output torque and rotational speed signals in a wired or wireless manner.

The torque sensor is a piezoelectric sensor, a capacitance sensor or an optical sensor.

This new model uses the above technical means to achieve the following effects: 1. The new type of torque and rotation speed sensing device uses fewer components and has a simple structure, which is easier to install and can reduce manufacturing costs. 2. The new type of torque and rotational speed sensing device can be applied to car bodies with general front and rear motors, or car bodies with central motors, and has a wide range of applicability. 3. The new model uses the torque and speed signals output by the torque and speed sensing devices to control the motor output, which can achieve more precise assist control.

The invention relates to a torque sensing device for electric bicycles. It mainly provides electric bicycles. According to the torque and speed signals output by the torque and speed sensing devices, the motor output can be accurately controlled to achieve smooth roads, uphill roads or encounters. The wind resistance can be appropriately compensated for the motor output, so as to provide a comfortable ride; here is based on different types of electric bicycles such as the general electric bicycle as shown in Figure 1 and the center-mounted motor type in Figure 4, and the use of different For various types of torque and rotational speed sensing devices, several implementations are listed, and the descriptions are as follows.

Please cooperate with the one shown in Figure 2, which is the first embodiment of the new model, which mainly adopts a general torsion sensing device in the form of strain gauges, in which several strain gauges 1 are attached to a large tooth of the car body 7. The disc 75 is provided with a connecting sleeve 751, and the connecting sleeve 751 is connected to one end of a bottom bracket shaft 74; in addition, a signal processing circuit board 11 is connected to an inner cover 76 , And the inner cover 76 is connected to the connecting sleeve 751 again.

In particular, the plurality of strain gauges 1 are electrically connected to the signal processing circuit board 11, and a signal transmitter 111 provided on the signal processing circuit board 11 wirelessly transmits the torque sensed by the plurality of strain gauges 1 to the outside. The torsion sensing device formed by the strain gauge 1 and the signal processing circuit board 11 will rotate with the bottom bracket shaft 74 together.

Finally, a multi-pole magnetic ring 2 is connected to the inner cover 76, and a circuit board 5 with a Hall IC device 3 is connected to an outer part of a five-way tube 71 provided on the car body 7. The cover body 72 and the outer cover body 72 correspond to the inner cover body 76, so that the Hall IC device 3 corresponds to the multi-pole magnetic ring 2, and then the five-way rotating shaft 74 (that is, the large chainring 75) is sensed The speed signal is transmitted to the circuit board 5; here, the circuit board 5 further includes a signal receiver 51 and a transmission interface 52. The signal receiver 51 can receive the torque signals of the plurality of strain gauges 1.

In the foregoing first embodiment, the rider's feet are first applied to a set of pedal rods 741 of the vehicle body 7, and the pedal rods 741 then transmit force to the bottom bracket shaft 74, and the bottom bracket shaft 74 again The power is transmitted to the connecting sleeve 751, and the connecting sleeve 751 transmits the power to the large chainring 75. In addition, the large chainring 75 bears the load of the road when passing through the chain 753 and the rear wheel. Therefore, the connection sleeve 751 will be deformed, so that the several strain gauges 1 will sense the torque signal of the input torque of the step rod 741, and wirelessly transmit the signal to the outside through the signal transmitter 111 of the signal processing circuit board 11.

Please cooperate with the one shown in Fig. 3. When the circuit board 5 receives the torque signal 12 of the strain gauge 1 and the rotational speed signal 13 of the Hall IC device 3, it is output to the electric bicycle through the transmission interface 52. A controller 77 is equipped with a microprocessor 771, which calculates the load value of the electric bicycle according to the aforementioned torque signal 12 and speed signal 13, as a control for controlling the output of the motor 78; It should be mentioned that the motor 78 of the aforementioned first embodiment is installed in the wheel drum of the front wheel or the wheel drum of the rear wheel of the electric bicycle.

Please cooperate with the one shown in FIG. 4, which is the second embodiment of the new type, which mainly adopts the general torsion sensing device of the magnetic induction method, and a multi-pole magnetic ring 2 is connected to the large chainring 75. The connecting sleeve 751 at the inner end is provided on a magnetizing block 752, and an integrated circuit board 6 used therein is integrated in a box body 73, and the box body 73 is then connected to the car body 7 A five-way tube 71 is provided; further, the integrated circuit board 6 is provided with a magnetic induction coil 61 and a Hall IC device 62, and the magnetic induction coil 61 and the Hall IC device 62 correspond to the multi-pole magnetic ring 2. The torque signal 12 and the speed signal 13 are sensed separately and simultaneously, and the integrated circuit board 6 transmits the torque signal 12 and the speed signal 13 to the microprocessor of the controller 77 of the electric bicycle 771, as a control to control the output of the motor 78.

Please cooperate with Figures 5 and 6, which is the third embodiment of the new model, which is a mid-mounted motor-type torque sensing device adopting a strain gauge method. This third embodiment is essentially the second embodiment of the new model. The main difference between the two embodiments is the difference in the motor installation position. The third embodiment uses a mid-mounted motor 711. The so-called mid-mounted motor 711 is to install the motor on the fifth part of the vehicle body 7. In the tube 71, the remaining chip gauge 1, the signal processing circuit board 11, the signal transmitter 111, the multi-pole magnetic ring 2, the Hall IC device 3, the circuit board 5, the signal receiver 51, The position where the transmission interface 52 and other components are installed on the vehicle body 7 and their functions are the same as those of the aforementioned first embodiment.

For the same reason, please cooperate with Fig. 7, which is the fourth embodiment of the new model, which is a mid-mounted motor-type torque sensing device adopting magnetic induction method. This fourth embodiment is essentially the second embodiment of the new model. The main difference between the two implementation aspects is the difference in the motor mounting position. The fourth implementation aspect uses a mid-mounted motor 711. The so-called mid-mounted motor 711 is the bottom bracket of the vehicle body 7. In the tube 71, the other components such as the multi-pole magnetic ring 2, the integrated circuit board 6, the induction coil 61, the Hall IC device 62, the transmission interface 52, etc. are installed on the vehicle body 7 at the same positions as the aforementioned second The implementation is the same.

In summary of the various implementation aspects of the present invention, the present invention relates to a "torque sensor for electric bicycles", and the torque sensor of the present invention can be set as a strain gauge, an electromagnetic sensor, a piezoelectric sensor, Capacitive sensors or optical sensors, and their structure has never been seen in books or publicly used, and sincerely meets the requirements of a patent application, I sincerely ask Jun Bureau to approve the patent as soon as possible. I really pray;

For those who need to be clarified, the above are the specific embodiments of the patent application and the technical principles used. If the concept of the patent application is changed, the resulting function still does not exceed the specification and drawings. All the spirits covered should be stated within the scope of this patent application.

1: Should be film regulation 11: Signal processing circuit board 111: Signal Transmitter 12: Torque signal 2: Multi-pole magnetic ring 3: Hall IC device 5: Circuit board 51: signal receiver 52: Transmission interface 6: Integrated circuit board 61: induction coil 62: Hall IC device 63: Speed signal 7: Car body 71: Five-way tube 711: Center Motor 72: Outer cover 73: Box body 74: Five-way shaft 741: step 75: large chainring 751: connecting sleeve 752: Magnetizing Block 753: chain 76: inner cover 77: Controller 78: Motor

[Figure 1] The three-dimensional exploded view of the new general torsion sensing device. [Figure 2] The cross-sectional schematic diagram of the general torsion sensing device of the new type adopting the strain gauge method. [Figure 3] Schematic diagram of the power assist control block diagram of the new electric assisted bicycle. [Figure 4] The cross-sectional schematic diagram of the general torsion sensing device of the new type adopting the magnetic induction method. [Figure 5] The three-dimensional exploded view of the new center-mounted motor torque sensing device. [Figure 6] The cross-sectional schematic diagram of the new type of center-mounted motor torque sensing device using strain gauge method. [Figure 7] The cross-sectional schematic diagram of the new type of central motor-type torque sensing device adopting the magnetic induction method.

1: Should be film regulation

11: Signal processing circuit board

111: Signal Transmitter

2: Multi-pole magnetic ring

3: Hall IC device

5: Circuit board

51: signal receiver

52: Transmission interface

71: Five-way tube

72: Outer cover

74: Five-way shaft

741: step

75: large chainring

751: connecting sleeve

76: inner cover

Claims (7)

A torque sensing device for electric bicycles, which includes: A torque sensor is attached to a connecting sleeve provided on a large chainring of the car body, and the connecting sleeve is attached to one end of a bottom bracket shaft to provide sensing the input torque of the pedal. ； A rotational speed sensor, which is attached to the vehicle body to provide sensing of the rotational speed of the bottom bracket shaft; A circuit board is tied to the car body to provide electrical connection or coupling to the plurality of torque sensors and speed sensors, and output the sensed torque and speed signals to the outside; The controller of the electric bicycle receives the signals of torque and speed output from the circuit board as a control for controlling the output of the motor. According to claim 1, the torque sensor device for an electric bicycle, wherein the torque sensor further includes a plurality of strain gauges and a signal processing circuit board, wherein the plurality of strain gauges are connected to the connecting sleeve, and The signal processing circuit board is connected to an inner cover body, and the inner cover body is connected to the connecting sleeve. The torque sensor device for an electric bicycle according to claim 2, wherein the speed sensor further includes a Hall IC device and a multi-pole magnetic ring, wherein the multi-pole magnetic ring is connected to the inner cover, The Hall IC device is connected to the circuit board, and the circuit board is connected to an outer cover on a five-way tube provided in the car body, and the outer cover corresponds to the inner cover, resulting in The Hall IC device corresponds to a multi-pole magnetic ring. The torque sensor device for an electric bicycle according to claim 1, wherein the torque sensor is configured as a multi-pole magnetic ring and is connected to a magnetizing block of the connecting sleeve, and the circuit board is The knot is arranged in a box body, and the box body is arranged on a five-way pipe arranged in the car body. According to claim 4, the torsion sensor device for electric bicycles, wherein the circuit board is an integrated circuit board, and the integrated circuit board is provided with a magnetic induction coil and a Hall IC device, and the magnetic induction coil and the Hall IC devices all correspond to the multi-pole magnetic ring. The torque sensing device for an electric bicycle according to claim 1, wherein the circuit board is configured to output torque and rotational speed signals in a wired or wireless manner. According to claim 1, the torque sensor device for an electric bicycle, wherein the torque sensor is a piezoelectric sensor, a capacitance sensor, or an optical sensor.

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