WO2020108504A1

WO2020108504A1 - Exercise bike

Info

Publication number: WO2020108504A1
Application number: PCT/CN2019/121117
Authority: WO
Inventors: 李荣春; 肖乐; 张培真
Original assignee: 李荣春
Priority date: 2018-11-28
Filing date: 2019-11-27
Publication date: 2020-06-04
Also published as: US20220023710A1; CN209204556U

Abstract

The utility model relates to an exercise bike, comprising a bike frame, a pedal device mounted on the bike frame, a head device mounted above the front of the bike frame and a seat device mounted above the rear of the bike frame, wherein, the pedal device comprises a pulley, two pedal bars drivingly connected to the pulley through a pulley shaft, and two pedals respectively connected to the ends of the two pedal bars, further comprising a hub-shaped permanent magnet synchronous motor, a control circuit and an energy consuming device, the rotating shaft of the permanent magnet synchronous motor is mounted on the bike frame through a bearing, the pulley is drivingly connected to the permanent magnet synchronous motor through a transmission belt, the permanent magnet synchronous motor is electrically connected to the energy consuming device, the control circuit is electrically connected to the permanent magnet synchronous motor and is capable of controlling the current passing through the permanent magnet synchronous motor, to solve the problem that the resistance adjustment effect of the resistance device of the exercise bike in the prior art is not good.

Description

Exercise bike

Technical field

The utility model relates to the field of fitness equipment, in particular to a fitness vehicle.

Background technique

Exercise bikes are called "power bikes" in the field of sports science. They are typical aerobic fitness equipment that simulates outdoor sports. They are also known as cardioviscular training equipment, which can improve the body's physical fitness. Of course, it is accompanied by fat consumption. And long-term consumption of fat will have the effect of weight loss and weight loss.

Exercise bikes increase the motion load through resistance devices. Existing resistance devices are generally divided into two categories, namely, magnetron resistance devices and friction resistance devices.

Among them, the magnetron resistance device is a structure in which the outer circle of the cast iron flywheel is covered with aluminum or copper skin, and then several sets of ferrite magnets are placed in the outer circumferential direction. When the flywheel rotates, the magnetic field generated by the aluminum or copper skin cutting the ferrite magnet The eddy current is generated in the aluminum skin or the copper skin, and the eddy current interacts with the magnetic field to generate resistance, and then the resistance is adjusted by adjusting the distance between the magnet and the flywheel. Since the method of resistance adjustment is a mechanical method, the magnet is usually pulled by hand or motor, so it has the following defects:

1. High failure rate: the cable or rod is used. The cable or rod is easily rusted and cannot be adjusted, and the magnet and the flywheel are easily rubbed to cause it to fall off;

2. The resistance adjustment accuracy is poor, and the adjustment is often not in place;

3. The resistance adjustment response is slow, and adjustment requires a long reaction process;

4. The aluminum skin or copper sheet is covered, the process is complicated and the cost is high.

The friction resistance device is to directly press the brake pads on the flywheel. The brake pads are usually made of leather and wool felt materials, and then cooperate with an adjustable depression knob to change the resistance through pressure changes. This method of resistance adjustment Has the following defects:

1. The noise is large, and the brake pads are consumables, and the brake pads need to be replaced regularly;

3. The resistance adjustment response is slow, and adjustment requires a long reaction process.

Utility model content

The utility model aims to provide an exercise bike. The resistance device of the exercise bike is realized by a permanent magnet synchronous motor, so as to solve the problem that the resistance adjustment effect of the resistance device of the existing exercise bike is not good.

The specific plan is as follows:

An exercise bike includes a frame, a treading device mounted on the frame, a head device mounted above the front of the frame, and a seat device mounted above the rear of the frame. The treading device includes a pulley, Two pedal rods connected to the pulley drive through the pulley shaft and the two pedals respectively connected to the ends of the two pedal rods also include a hub-shaped permanent magnet synchronous motor, a control circuit and an energy-consuming device. The permanent magnet synchronous motor The rotating shaft is mounted on the frame through bearings, the pulley is connected to the permanent magnet synchronous motor through the transmission belt, the permanent magnet synchronous motor is electrically connected to the energy dissipation device, and the control circuit is electrically connected to the permanent magnet synchronous motor and The current through the permanent magnet synchronous motor can be controlled.

Further, it also includes an inertia wheel, which is nested on the permanent magnet synchronous motor.

Further, the energy consuming device is a power resistor.

Further, it also includes an upper computer, which is signal-connected to the control circuit to send the resistance control command issued by the upper computer to the control circuit.

Further, the upper computer is a controller provided on the handlebar of the head and head device, and the controller can set resistance.

Further, the upper computer is an intelligent terminal, and the intelligent terminal has an application program, and the application program can set resistance.

Compared with the prior art, the exercise bike provided by the utility model has the following advantages: the resistance device of the exercise bike provided by the utility model is controlled by controlling the current through the permanent magnet synchronous motor, which has electronic adjustment, real-time, and precise Features of controllable resistance.

BRIEF DESCRIPTION

Figure 1 shows a perspective schematic view of an exercise bike.

Figure 2 shows a side view of the exercise bike.

detailed description

To further illustrate the various embodiments, the present invention is provided with drawings. These drawings are part of the disclosure content of the utility model, which are mainly used to explain the embodiment, and can explain the operation principle of the embodiment in conjunction with the relevant description of the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and advantages of the present invention. The components in the figure are not drawn to scale, and similar component symbols are usually used to indicate similar components.

The present invention will be further described with reference to the drawings and specific embodiments.

As shown in FIGS. 1 and 2, the present invention provides an exercise bike, which includes a frame 1, a treading device 2 installed on the frame, a head device 3 installed above the front of the frame, and The seat device 4 installed above the rear of the frame, wherein the role of the frame 1 is to provide a stable support for the exercise bike.

Wherein, the stepping device 2 includes a pulley 20, two pedal rods 22 drivingly connected to the pulley 20 through the pulley shaft 200, and two pedals 24 respectively connected to the ends of the two pedal rods 22 to drive the belt through the pedal 24 The wheel 20 rotates, and also includes a hub-shaped permanent magnet synchronous motor 26, a control circuit (not shown in the figure) and an energy dissipation device (not shown in the figure), the hub-shaped permanent magnet Synchronous motor 26 refers to designing the shell shape of the existing permanent magnet synchronous motor into the shape of a hub. Its internal structure is the same as that of the existing permanent magnet synchronous motor, and also has a stator and a rotor. The rotating shaft of the permanent magnet synchronous motor 26 passes through The bearing is mounted on the frame 1, and the pulley 20 is connected to the permanent magnet synchronous motor 26 through a transmission belt 28. That is, when the pulley 20 drives the permanent magnet synchronous motor 26, the rotor of the permanent magnet synchronous motor 26 is fixed. The housing of the permanent magnet synchronous motor 26 and the stator inside the housing rotate with the pulley 20.

The permanent magnet synchronous motor 26 is electrically connected to the energy dissipation device. Since the stator winding cuts the magnetic field when the exercise bike is performing exercise, the induced current is generated. The permanent magnet synchronous motor 26 is used as a generator, so the exercise is riding The current generated by the time is consumed by the energy dissipation device; the control circuit (the control circuit is in the prior art, which will not be repeated here) is electrically connected to the permanent magnet synchronous motor 26 and can control the current passing through the permanent magnet synchronous motor. When the permanent magnet synchronous motor 26 needs to increase the motion load, the permanent magnet synchronous motor 26 will generate resistance to hinder riding when it is energized. The permanent magnet can be changed by controlling the amount of current passing through the permanent magnet synchronous motor 26 The size of the electromagnetic torque of the synchronous motor 26 can be adjusted to hinder the resistance of the ride, thereby adjusting the load added during exercise, and the current-controlled electromagnetic torque control method of the permanent magnet synchronous motor can be through the field-oriented control system ( FOC) to achieve. That is, the permanent magnet synchronous motor 26 serves as the resistance device of the exercise bike, and it realizes resistance adjustment through the magnitude of the current, that is, through electronic adjustment, so it has the advantages of real-time, precise and controllable.

Referring to FIGS. 1 and 2, in this embodiment, an inertia wheel 260 is further included. The inertia wheel 260 is nested on the permanent magnet synchronous motor 26, that is, on the outer casing of the permanent magnet synchronous motor 26. One inertia wheel 260.

In this embodiment, preferably, the energy dissipation device is a power resistor, that is, the current generated by the permanent magnet synchronous motor 26 is dissipated in the form of thermal energy through the power resistor during riding.

In this embodiment, preferably, it also includes an upper computer, which is connected to the control circuit signal to send the resistance control command issued by the upper computer to the control circuit, and the control circuit sets the motor corresponding to the resistance The current value of resistance (the current value is based on the resistance current meter calibrated by the motor). Among them, the host computer can be a controller 50 provided on the handlebar of the front device, the controller 50 can set resistance, and the control circuit can be connected to the controller 50 through a universal wired interface, such as: UART, CAN, 485, etc. In order to receive the resistance control command of the controller 50; then according to the characteristics of the electromechanical energy conversion of the motor, through FOC control, real-time, accurate and smooth resistance output can be achieved, and accurate power measurement can be achieved. In addition, the host computer can also be a smart terminal, such as a smart phone, a tablet computer, etc. The smart terminal can be connected to the control circuit signal through a wireless connection, such as WiFi, Bluetooth, etc., and the smart terminal has a corresponding application program ( APP), the application can set resistance, and then send resistance control commands to the control circuit through wireless transmission. The control circuit can realize real-time, accurate and smooth control through FOC according to the characteristics of motor electromechanical energy conversion. Resistance output, and can achieve accurate power measurement.

Although the present invention has been specifically shown and introduced in conjunction with the preferred embodiment, those skilled in the art should understand that the form and details can be made without departing from the spirit and scope of the present invention as defined by the appended claims Various changes made to the utility model are within the protection scope of the utility model.

Claims

An exercise bike includes a frame, a stepping device installed on the frame, a head device installed above the front of the frame, and a seat device installed above the rear of the frame, characterized in that the stepping device includes It includes a pulley, two pedals connected to the pulley drive through the pulley shaft, and two pedals respectively connected to the ends of the two pedals. It also includes a hub-shaped permanent magnet synchronous motor, a control circuit, and an energy-consuming device. The rotating shaft of the permanent magnet synchronous motor is mounted on the frame through a bearing, the pulley is connected to the permanent magnet synchronous motor through a transmission belt, the permanent magnet synchronous motor is electrically connected to an energy-consuming device, and the control circuit is synchronized with the permanent magnet The motor is electrically connected and can control the current through the permanent magnet synchronous motor.
The exercise bike according to claim 1, further comprising an inertia wheel nested on the permanent magnet synchronous motor.
The exercise bike of claim 1, wherein the energy consuming device is a power resistor.
The exercise bike according to claim 1, further comprising an upper computer, which is signal-connected to the control circuit to send the resistance control command issued by the upper computer to the control circuit.
The exercise bike according to claim 4, wherein the upper computer is a controller provided on the handlebar of the head device, and the controller can set resistance.
The exercise bike according to claim 4, wherein the upper computer is an intelligent terminal, and the intelligent terminal has an application program, and the application program can set resistance.