CN214073918U

CN214073918U - Lorentz brake system of electric wheelchair

Info

Publication number: CN214073918U
Application number: CN202022001314.7U
Authority: CN
Inventors: 刘泽华; 张明兴
Original assignee: Tianjin Taisite Instrument Co ltd
Current assignee: Tianjin Taisite Instrument Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-08-31
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses an electronic wheelchair lorentz braking system, including motor I and motor II, still include lorentz brake control box body, lorentz brake control box body is assembled motor output end direction of motion is opposite with magnetic force direction. The utility model discloses a power-driven wheelchair lorentz braking system who provides relies on the lorentz force that coil cutting magnetic line of force produced the electric current and arouses to realize the effect of similar brake, and this equipment structure is simple, uses portably, and the electronic wheelchair braking system of switching that can be direct fast makes it carry out manual switching circuit, the operation of being convenient for.

Description

Lorentz brake system of electric wheelchair

Technical Field

The utility model relates to an oil diffusion booster pump technical field relates to an electronic wheelchair lorentz braking system particularly.

Background

If the wheelchair is in a moving state and stops, the wheelchair can be inertially rushed forward for a long distance and then stops under the action of friction force; if the slope is inclined, the slope can slide down at an accelerated speed due to gravity, and the risk is quite high.

When a part of the closed circuit cuts magnetic lines of force in a magnetic field, current can be generated in the conductor, moving charges can generate Lorentz force to prevent the conductor from moving, the Lorentz force is the force of the moving charges in the magnetic field, namely the acting force of the magnetic field on the moving charges, and the Lorentz brake system is developed by utilizing the electromagnetic phenomenon.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem that prior art exists, an aspect of the utility model aims at providing an electronic wheelchair lorentz braking system, aims at utilizing the lorentz force, ampere force brake motor realizes slowing down promptly.

Technical scheme

In order to realize the above-mentioned purpose, the utility model provides a pair of electronic wheelchair lorentz braking system, including motor I and motor II, still include lorentz brake control box body, lorentz brake control box body includes switch head, lid, switch guard shield and circuit board and drain pan, switch head fixed mounting in the recess of lid, the switch guard shield install in on the button of circuit board to protruding stretching to the inside of switch head, the lid install in the top of drain pan.

Preferably, a single-pole double-throw switch I, a single-pole double-throw switch II, a relay I and a relay II are integrated on the circuit board, the single-pole double-throw switch I and the relay I form a group, and the single-pole double-throw switch II and the relay II form a group.

Preferably, the port of the relay I is connected with L11, L12 and L13, and L11, L12 and L13 are connected with three-way output ends of a coil winding in the motor I;

the port of the relay II is connected with L21, L22 and L23, and L21, L22 and L23 are connected with the three-way output end of a coil winding in the motor II. And the V + and V-joint wheelchair controller operates an enabling port, when the wheelchair moves, the port has DC24V direct current output, and the coils of the relay 1 and the relay 2 are DC12V and are electrified and attracted at the same time. When the wheelchair stops moving, the coils of the enabling port power-off relay 1 and the relay 2 are powered off and disconnected. L11, L12 and L13 correspond to three paths of output ends of a coil winding of the motor No. 1 output from the wheelchair controller; l21, L22 and L23 correspond to three output ends of a coil winding of a No. 2 motor in the wheelchair controller.

Preferably, the L12 and the L13 are connected to a normally closed point of the relay I, and the L22 and the L23 are connected to a normally closed point of the relay II.

Advantageous effects

Compared with the prior art, the utility model provides a pair of electronic wheelchair lorentz braking system possesses following beneficial effect: the device has simple structure and convenient use, can quickly and directly switch the electric wheelchair brake system, can manually switch the circuit and is convenient to operate.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

FIG. 1 is a schematic diagram of the explosion structure of the Lorentz brake control box of the present invention;

FIG. 2 is a schematic diagram of the circuit matching structure in the non-braking state of the present invention;

fig. 3 is the schematic diagram of the circuit matching structure of the brake function state of the present invention.

The main reference numbers:

1. a switch head; 2. a box cover; 3. a switch shield; 4. a circuit board; 5. a bottom shell.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

Referring to fig. 1-3, a lorentz brake system of an electric wheelchair includes a motor I, a motor II and a lorentz brake control box, wherein the lorentz brake control box includes a switch head 1, a box cover 2, a switch shield 3, a circuit board 4 and a bottom shell 5, the switch head 1 is fixedly installed in a groove of the box cover 2, the switch shield 3 is installed on a button of the circuit board 4 and protrudes into the switch head 1, and the box cover 2 is installed on the top of the bottom shell 5.

Furthermore, a single-pole double-throw switch I, a single-pole double-throw switch II, a relay I and a relay II are integrated on the circuit board 4, the single-pole double-throw switch I and the relay I form a group, and the single-pole double-throw switch II and the relay II form a group. The port of the relay I is connected with L11, L12 and L13, L11, L12 and L13 are connected with three-way output ends of a coil winding in the motor I, the port of the relay II is connected with L21, L22 and L23, and L21, L22 and L23 are connected with three-way output ends of a coil winding in the motor II.

It should be noted that L12 and L13 are connected to the normally closed point of relay I, L22 and L23 are connected to the normally closed point of relay II, and further, as can be seen from fig. 2 and 3, the V + and V-joint wheelchair controller operates the enabling port, when the wheelchair moves, the port has DC24V DC power output, and the coil of relay 1 and relay 2 is DC12V and is powered on and attracted at the same time. When the wheelchair stops moving, the coils of the enabling port power-off relay 1 and the relay 2 are powered off and disconnected.

In the specific implementation process, as shown in fig. 1, no matter whether two relays are attracted to the controller, the coil winding output ends of two motors are kept in a non-communicated state, at the moment, the coil winding of the motors is in a non-closed state and cannot form a loop by itself, and at the moment, the wheelchair can be inertially moved forward for a long distance from a motion state to a stop state and then stops under the action of friction force; if the slope is inclined, the slope can slide down at an accelerated speed due to gravity, and the risk is quite high.

In the figure 2, when the wheelchair moves and operates, the relays are attracted and closed, and L11, L12 and L13 are not communicated with each other; l21, L22 and L23 are not communicated with each other, and the controller drives the motor to operate normally. When the wheelchair stops, the relay coils lose power, and the normally closed points of the relay 1 are connected with L12 and L13, and L12, L13 and L11 are communicated and shorted with each other as seen by the circuit in FIG. 2. Similarly, L22, L23 and L21 are short-circuited at this time, that is, L1, L2 and L3 are short-circuited in fig. 3, and a closed winding coil is formed at this time. When the wheelchair displaces under the action of inertia or gravity, the wheelchair wheel set can drive the speed change mechanism to rotate, the speed change mechanism can drive the motor to rotate, the winding coil of the motor can cut magnetic lines of force to generate current, the current flows in the closed loop to generate Lorentz force, the direction of the Lorentz force is opposite to the rotation direction of the winding of the motor, and the force can prevent the motor from rotating. The force for preventing the motor from moving is further amplified under the action of the speed change mechanism, so that the trend for preventing the wheelchair from continuously moving is generated, the wheelchair can rapidly decelerate and stop on a horizontal ground, and moves downwards at a very slow speed on a slope, so that the risks of inertial thrust forward and rapid slope sliding of the wheelchair are avoided, the battery power supply is not needed in the process, and the Lorentz force caused by the current generated by the magnetic lines of force cut by the coils is completely used for realizing the effect similar to braking.

L11, L12, L13, L22, L23 and L21 are specifically conductive wires.

It will be appreciated by those skilled in the art that other similar connections may be used to implement the present invention. Such as welding, bonding, or screwing.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

The above embodiments are merely exemplary embodiments of the present invention, which is not intended to limit the present invention, and the scope of the present invention is defined by the appended claims. Various modifications and equivalents may be made by those skilled in the art to the present invention without departing from the spirit and scope of the invention, and such modifications and equivalents should be considered to be within the scope of the invention.

Claims

1. The utility model provides an electronic wheelchair lorentz braking system, includes motor I and motor II, its characterized in that still includes lorentz brake control box body, lorentz brake control box body includes switch head (1), lid (2), switch guard shield (3) and circuit board (4) and drain pan (5), switch head (1) fixed mounting in the recess of lid (2), switch guard shield (3) install in on the button of circuit board (4) to protruding stretch to the inside of switch head (1), lid (2) install in the top of drain pan (5).

2. The lorentz brake system of an electric wheelchair according to claim 1, wherein a single-pole double-throw switch I, a single-pole double-throw switch II, a relay I and a relay II are integrated on the circuit board (4), the single-pole double-throw switch I and the relay I are in one group, and the single-pole double-throw switch II and the relay II are in one group.

3. The Lorentz brake system for the electric wheelchair as claimed in claim 2, wherein the ports of the relay I are connected with L11, L12 and L13, and L11, L12 and L13 are connected with the three-way output end of the coil winding in the motor I;

the port of the relay II is connected with L21, L22 and L23, and L21, L22 and L23 are connected with the three-way output end of a coil winding in the motor II.

4. The Lorentz brake system for electric wheelchair as claimed in claim 3, wherein the L12 and L13 are connected to the normally closed point of the relay I, and the L22 and L23 are connected to the normally closed point of the relay II.