Improved torsion force indicator

Abstract

An improved torsional force detector for the pedal of electric bicycle has a torsional force sensing axle in the the 5-way tube of frame at the position of drive disk gear. Its both ends are connected with the pedals. A crank joint block, elastic steel plate and torsional force detector group are positioned on the inner surface of said drive disk gear. A deformation amplifier is contained by saidtorsional force detector group for outputting the torsional deformation signal.

Description

technical field [0001] The present invention is an improvement of a torque detector, especially used in the auxiliary power of electric bicycles, and the pedal force is used to make a crank of the crank coupling block press the elastic steel plate to deform, and the elastic steel plate is pressed The deformation degree of the resistance strain gauge in the deformation amplifier provides the electrical signal output of the relative torque deformation amount to be rotated when the torque sensing shaft is rotated under force, so as to achieve a stable detection effect. Background technique [0002] By the way, electric bicycles are one of the most popular means of transportation at present, especially under the environmental trend that the concept of environmental protection is generally deeply rooted in the hearts of the people, electric bicycles have gradually replaced bicycles and become the mainstream of light-weight means of transportation in the future. However, in the st...

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Problems solved by technology

[0004] In addition, the above-mentioned conventional auxiliary power output torque control of the electric bicycle, because the input control signal is a simple on-off type, and the input auxiliary power torque is also the largest, cannot automatically consider the actual pedal of the electric bicycle. In addition to easily causing unnecessary waste of electricity and manpower, in the process of driving the electric bicycle, it is also very easy to produce the situation that the auxiliary power is put in or cut off instantly, such as starting and stopping. , because the auxiliary transmission power comes from the momentary input torque changes too fast, causing the electric bicycle to shake or vibrate unstable, and it is impossible to make the electric bicycle produce the effect of human-vehicle integration

[0005] Furthermore, there may be manufacturers who have made improvements to control the auxiliary power input of the auxiliary transmission power source in the electric bicycle with the structure and operation method of the refueling handle. Of course, it can be slightly improved compared to the above-mentioned conventional control method of pressing the switch. The input of the auxiliary power and torque, but to operate the input of the auxiliary transmission power source in the way of one-hand refueling, the input of the auxiliary transmission power source must be controlled by turning the refueling handle according to the driver's visual state and experience judgment. Therefore, it is impossible to fully achieve the proper power and torque of the electric bicycle depending on the road conditions and the actual torque demand state, especially when driving for a long time, it is easy to make the muscles of the hands tense and tired or tense and out of control due to sudden situations , if the refueling handle is rotated to the maximum, it cannot be returned immediately, resulting in loss of control in operation and resulting in accidental disasters

[0006] In addition, in terms of relevant previous patent technical documents, such as Taiwan's new patent application No. 84215538 "Pedal Drive Electric Auxiliary Power Motor Device", it discloses a power of an auxiliary power motor The disadvantage of the input control method is the same as that of the above-mentioned electric bicycles controlled by the refueling handle. It cannot really achieve the effect of properly outputting auxiliary power according to different situations and actual torque requirements; in addition, in US Patent No. 5,900,703, It also discloses that a number of magnets are installed on the chainring driven by the pedal, and a detection structure of a magnetic reed switch is installed on the corresponding position of the frame, so as to be used according to the magnets on the tooth plate and the magnets on the frame. The distance sensing signal between the reed switches is used to control the start (on) of the auxiliary transmission power or cut off (off) the auxiliary transmission power, but its disadvantage is that the auxiliary transmission power source, such as the uniform output power of the motor, cannot input different power requirements depending on the actual road conditions Therefore, in the state where there is no need to input high power and torque, but the input of auxiliary transmission power is still required, it is necessary to frequently use mechanical brakes to match and control, correspondingly, causing more consumption of ineffective power, resulting in the travel of the electric bicycle Reduced range and poorer efficiency of auxiliary drive power

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