CN201189940Y - Pedal capable of sensing pedaling force - Google Patents

Abstract

A pedal capable of sensing pedal force is installed in a pedal transmission mechanism of an electric power-assisted bicycle. The pedal transmission mechanism receives pedal force and drives a crank to rotate. The pedal comprises: an axle rod combined with one end of the crank to drive the crank to rotate; a first plate body and a second plate body connected to the axle rod for pedaling, and a narrow gap is formed between the first and second plate bodies; and a magnetic induction group comprises a magnetic induction element and a magnetic body, which are respectively compressed by the first plate body and the second plate body to change the distance between the two and to make the magnetic induction element generate a pedal force sensing signal. Therefore, the utility model can improve the riding safety of the electric power-assisted bicycle, and the sensing of pedal force is more accurate.

Description

Force-sensing pedals

technical field

The utility model relates to an electric power-assisted bicycle, in particular to a pedal which can sense pedal force.

Background technique

By the way, under the influence of rising oil prices, energy-saving vehicles have become the focus of the public. Among them, electric-powered electric bicycles have the advantages of no pollution and low energy consumption. Therefore, in recent years, electric bicycles, regardless of It is used for fitness, leisure or short-distance transportation, and it has become increasingly popular in the market.

Generally speaking, electric assist bicycles determine the power supply of the motor according to the user's pedaling force and the assist ratio mode set by the system, so electric assist bicycles must be equipped with a pedaling force sensing system to sense the user's pedaling force In the known technology, the industry mainly installs various sensors on the drive gear or the rear wheel axle to sense the gear speed or the bearing pressure of the axle, and then convert the sensing signal to the control system to determine the motor assist.

However, there are still some shortcomings in the above-mentioned sensing mode. In terms of sensing the rotational speed of the driving gear, when the user does not apply any pedal force, the driving gear will still continue to rotate. When stepping on the bicycle, the system will not immediately stop supplying the power of the motor, which is relatively easy to cause danger; on the other hand, in terms of sensing the bearing pressure of the wheel shaft, the mechanical structure of its installation is relatively complicated, and relatively difficult to maintain. Inconvenient; therefore, the known technology still needs to be improved.

Utility model content

The purpose of the utility model is to provide a pedal that can sense the pedaling force, so as to improve the safety of riding an electric assist bicycle, and the user's pedaling force sensing is more reliable, and the structure is simple, which is convenient for replacement and maintenance.

In order to achieve the above purpose, the utility model provides a pedal that can sense pedaling force, which is installed on an electric assist bicycle. The bicycle includes a vehicle body, a battery, a driving motor, a main controller and a pedal transmission mechanism. The controller is electrically connected to the battery and the drive motor, and the pedal transmission mechanism bears the power of the pedal to drive a crank to rotate; wherein, the pedal includes:

a shaft, compounded at one end of the crank, to drive the crank to rotate;

A first board and a second board are connected to the shaft for stepping on, and there is a slit between the first and second boards; and

A magnetic sensing group, which has a magnetic sensing element and a magnetic body, respectively pressed by the first plate body and the second plate body, so that the distance between them changes, and the magnetic sensing element produces a pedal force sensing Signal.

The pedal that can sense the stepping force also includes a circuit module, which has a power supply and a microprocessor, and the microprocessor is electrically connected to the power supply and the magnetic induction group, and it receives and processes the sensor sensed by the magnetic induction The measured pedal force sensing signal.

In the pedal that can sense the pedaling force, a wireless transmission part is also arranged in the microprocessor of the circuit module to transmit the pedaling force sensing signal to the main controller.

In the pedal that can sense pedaling force, the power supply part of the circuit module is a gold capacitor.

In the stepping force-sensing pedal, the power supply part of the circuit module is a generator, which is installed on the shaft, so as to use the rotation of the shaft to generate electricity.

The pedal that can sense pedal force, wherein the magnetic sensor of the magnetic sensor group is a Hall sensor (HallSensor).

The pedal that can sense pedaling force, wherein the magnetic induction group also has a clip body, which is connected to the shaft rod, and the clip body has two separated ears, and the outer surfaces of the two ears are respectively attached to the The first and second plates, and the magnetic sensor and the magnetic body are respectively arranged on the inner surface of the two ears.

To sum up, the pedals provided by the utility model that can sense pedaling force are installed in the pedal transmission mechanism of an electric power-assisted bicycle, and the pedal transmission mechanism receives the power of the pedals to drive a crank to rotate; wherein, the pedal includes There are: a shaft is compounded at one end of the crank to drive the crank to rotate; a first board and a second board are connected to the shaft for stepping on, and there is a A slit; and a magnetic induction group has a magnetic induction element and a magnetic body, which are respectively pressed by the first plate body and the second plate body, so that the distance between the two changes, and the magnetic induction element generates A pedal force sensing signal.

Summing up the above description, it can be known that the application of the utility model on electric power-assisted bicycles makes the detection of pedaling force more reliable, and the utility model can also be used as a safety switch to further improve the safety of riding, and the utility model The new structure is simple, which makes installation or maintenance more convenient.

Description of drawings

Fig. 1 is a three-dimensional exploded view of a preferred embodiment of the present invention.

Fig. 2 is a three-dimensional combined view of a preferred embodiment of the utility model.

Fig. 3 is a partial cross-sectional view of some components of a preferred embodiment of the present invention.

Fig. 4 is a partial exploded view of another preferred embodiment of the present invention.

Explanation of main component symbols in the attached drawings:

Shaft 10

Shaft joint 11

circuit module 20

Power unit 22

The first board body 30&30A

Junction 32

tread part 34

Second board 40&40A

Junction 42

Stepped part 44

Magnetic induction group 50&50A

clip body 52

ear 522

Magnetic sensor 54&54A

Magnetic body 56&56A

Slit C

Detailed ways

In order to better understand the features and effects of the present utility model, the following examples are given together with the accompanying drawings for description.

Firstly, the utility model is a pedal that can sense pedaling force, which is installed on a bicycle body (not shown in the figure), and includes a battery, a driving motor, a main controller and a pedal transmission mechanism. Among them, the battery is used to provide the electric power required by the bicycle. The main controller is electrically connected to the battery and the drive motor to control the power output of the drive motor. The force of pedaling drives a crank (not shown) to rotate, and the crank is combined with a chainring group (not shown) at the same axis. The chainring group is composed of several chainrings and chains, which are also connected to the drive motor; Therefore, when the user pedals, the crank rotates under the pedal force, or the main controller can control the drive motor to output power, and then the chainring group can drive the force to make the bicycle move forward.

Further, the pedal of the present invention is applied to the crank of the pedal transmission mechanism for the user to step on. Please refer to FIG. 1 to FIG. A board body 30 , a second board body 40 and a magnetic induction group 50 .

The shaft 10 has a shaft joint 11, which is combined with one end of the crank of the pedal transmission mechanism. The shaft 10 can rotate relative to the crank and drive the crank to rotate.

The circuit module 20 is sleeved on the shaft 10, and has a power supply 22 and a microprocessor (not shown in the figure). The rotation of the shaft 10 generates electricity, and the microprocessor is electrically connected to the power supply unit 22. There is a wireless transmission unit inside, which can transmit the signal generated by the microprocessor to the main controller, so as to further control the power output of the drive motor ; Among them, the microprocessor and the power supply unit 22 are combined into the same module assembly in this embodiment with a modular design.

The first and second plates 30 & 40 both have two joints 32 & 42, which are respectively connected to both sides of the power supply part 22 of the circuit module 20, and contact each other up and down. Each joint 32 & 42 extends forward to form a stepping part 34 & 44, each There is a slit C between the stepping parts 34 & 44 , each stepping part 34 & 44 can be stepped on by the user, and then the shaft 10 drives the crank to rotate.

The magnetic induction group 50 has a clip body 52, a magnetic induction part 54 and a magnetic body 56. The clip body 52 is connected to the power supply part 22 of the circuit module 20, and it has two separated ears 522. The outer parts of each ear part 522 are The side surfaces are attached to the inner surfaces of the stepping parts 34 & 44 of the first and second plate bodies 30 & 40, the magnetic induction parts 54 and the magnetic bodies 56 are respectively arranged on the inner surfaces of the ear parts 522, and the magnetic induction parts 54 are electrically connected to the circuit module 20 A microprocessor can sense the change of the magnetic flux of the magnetic body 56 to generate a pedaling force sensing signal, wherein the magnetic sensor 54 is a Hall Sensor in this embodiment.

With the above-mentioned components, when the user rides the bicycle, the pedaling force of the user will press on the pedaling parts 34 & 44 of the first board body 30 or the second board body 40, so that the slits C between the pedaling parts 34 & 44 are relatively narrowed, At the same time, the two ears 522 of the clip body 52 of the magnetic induction group 50 are pressed together, so the distance between the magnetic induction part 54 and the magnetic body 56 is also changed, and the magnetic induction part 54 can sense the change of the magnetic flux of its relative magnetic body 56. , to obtain the pedaling force sensing signal, and return the pedaling force sensing signal to the microprocessor of the circuit module 20, and then the microprocessor transmits it to the main controller; in other words, the utility model uses the pedaling force to compress The small distance change produced is then sensed by the magnetic sensor 54 and the magnetic flux change between the magnetic body 56 to obtain the pedaling force sensing signal. Thus, the main controller can control the bicycle to advance, that is, by the utility model The measured signal is used to control the output power of the driving motor.

Wherein, when the user's feet are not pressing on the first plate body 30 or the second plate body 40, the main controller can stop driving the motor, or when the user leaves the pedal due to an accident, the utility model The new model can also achieve the design function of the safety switch, so that the electric power-assisted bicycle can be powered off immediately; therefore, the utility model can make the pedal force detection of the electric-assisted bicycle more accurate by improving the sensing method and installation position of the pedal force , and the installation of the pedal of the utility model is also relatively simple, which makes maintenance more convenient.

What must be explained here is that in this embodiment, the circuit module 20 is sleeved on the shaft 10 in a modular design. The power part of the module is an object that can store electric energy, such as a battery (not shown) or a gold capacitor in the form of a capacitor battery (not shown), then the circuit module does not need to be arranged on the shaft 10, but can be installed On the first plate 30 or the second plate 40, and the first plate 30 and the second plate 40 can also be connected to the shaft 10, thus, the utility model can reduce the cost of modular production of the circuit module 20 cost.

In addition, the utility model can also be changed as follows, as shown in FIG. 4 , which is different from the previous embodiment in that: the magnetic sensor 54A and the magnetic body 56A of the magnetic sensor group 50A are installed on the first plate 30A and the second plate respectively. The second board 40A and the magnetic sensor 54A are also electrically connected to the circuit module (not shown in the figure), thus, the magnetic sensor 54A and the magnetic body 56A can also be pressed by the first board 30A and the second board 40A If the distance between the two is changed, the magnetic sensor 54A can sense the change of the magnetic flux. Therefore, the utility model can simplify the components and further reduce the production cost.

To sum up, the constituent components described in the foregoing embodiments of the present invention are only for illustration and are not intended to limit the scope of the present invention. The substitution or change of other equivalent components should also be included in the present invention. covered by the claims of the application.

Claims (7)

1. A pedal capable of sensing pedal force, installed on an electric power-assisted bicycle, characterized in that the bicycle includes a vehicle body, a battery, a driving motor, a main controller and a pedal transmission mechanism, the main controller Electrically connected to the battery and the drive motor, the pedal transmission mechanism receives the power of the pedal to drive a crank to rotate; wherein, the pedal includes: a shaft, compounded at one end of the crank, drives the crank to rotate; A first board and a second board are connected to the shaft for stepping on, and there is a slit between the first and second boards; and A magnetic sensing group, which has a magnetic sensing element and a magnetic body, respectively pressed by the first plate body and the second plate body, so that the distance between them changes, and the magnetic sensing element produces a pedal force sensing Signal. 2. According to claim 1, the pedal that can sense pedaling force is characterized in that it includes a circuit module with a power supply and a microprocessor, and the microprocessor is electrically connected to the power supply and the magnetic induction unit , receiving and processing the pedal force sensing signal sensed by the magnetic sensor. 3. The pedal with pedal force sensing according to claim 2, wherein the microprocessor of the circuit module is provided with a wireless transmission part for transmitting the pedal force sensing signal to the main controller. 4. The pedal force-sensing pedal according to claim 2, wherein the power supply of the circuit module is a gold capacitor. 5. The stepping force-sensing pedal according to claim 2, wherein the power supply part of the circuit module is a generator, which is installed on the shaft, and uses the rotation of the shaft to generate electricity. 6. The pedal with pedal force sensing according to claim 1, wherein the magnetic sensor of the magnetic sensor group is a Hall magnetic sensor. 7. The pedal according to claim 1, wherein the magnetic induction group further has a clip body connected to the shaft, and the clip body has two separated ears, the two The outer surfaces of the ear parts are attached to the first and second boards respectively, and the magnetic sensor and the magnetic body are respectively arranged on the inner surfaces of the two ear parts.

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