CN210843885U

CN210843885U - Wheelchair with bidirectional power supply composite power

Info

Publication number: CN210843885U
Application number: CN201920967456.3U
Authority: CN
Inventors: 卢妃
Original assignee: Jinhua Radio And Television University
Current assignee: Jinhua Radio And Television University
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-26
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a wheelchair with bidirectional power supply composite power, which adopts the technical proposal that the wheelchair comprises a wheelchair body, a moving mechanism, a battery module and a controller, wherein the battery module comprises a lithium battery, a super capacitor and a bidirectional direct-current power supply converter DC/DC; the moving mechanism comprises a driving wheel and a following wheel which are rotatably connected to the bottom of the wheelchair body, and a crawler body which is rotatably connected to the driving wheel and the following wheel, the number of the driving wheel is two, the two driving wheels are respectively positioned at the front end and the rear end of the wheelchair body, at least two following wheels are arranged, each following wheel is positioned between the two driving wheels, the bottom of the wheelchair body is rotatably connected with a swinging arm for mounting the driving wheel, one end of the swinging arm is hinged with the wheelchair body, the other end of the swinging arm is rotatably connected with the following wheel, and a first driver for driving the swinging arm to rotate around the hinged part of the wheelchair body is arranged between; the wheelchair can effectively guarantee the use safety and reliability of a rider.

Description

Wheelchair with bidirectional power supply composite power

Technical Field

The utility model relates to a wheelchair, more specifically, it relates to a wheelchair with two-way power supply combined power.

Background

China is the country with the largest population in the world, and aging and disability are major problems which we have to face. For elderly people and disabled persons who may affect leg movements due in part to disability, the walking ability of the person may suffer from a progressive weakening if the person is not effectively trained. In order to provide safe, reliable and superior travel tools for old people and disabled people, help the old people and the disabled people to improve the freedom of movement and be re-integrated into the society, the intelligent wheelchair applying the intelligent robot technology to the electric wheelchair attracts more and more attention and attention of the whole society, and basic research and development of product equipment in the aspect are important subjects of future economic development of China.

At present, wheelchair products seen in the market of China mainly include a manual wheelchair and an electric wheelchair, wherein the manual wheelchair is favored by the market due to low price, but the use of the manual wheelchair is mainly concentrated in the youth and vigorous range of upper limbs, so that the use of old people and a part of disabled people is limited, and the electric wheelchair becomes the inevitable choice of the old people and the disabled people under the condition of permission of economic conditions. However, the electric wheelchairs sold in the market at present are generally only provided with a power source and a control unit on the basis of manual wheelchairs, and the problem that the old people do not have physical self-propelled wheelchairs to travel is solved, but the existing electric wheelchairs not only need to have a flat ground walking function, but also have a stair climbing function of crossing grooves, sills and going up and down stairs, so that the power source of the traditional electric wheelchairs does not adapt to the use requirement; and the electric wheelchair can inevitably meet obstacles such as low-lying objects, stones and the like when running outdoors, and because the reaction capability of the old and the disabled is poorer, if the accidents are easily caused by untimely treatment, the practical requirements of the old and the disabled cannot be fully met in the aspects of safety, reliability and functionality.

Therefore, the safe and reliable electric wheelchair product is researched and developed, and a superior travel tool is provided for the old and the disabled, so that the life quality of the crowd is improved, the social harmony development is promoted, and the electric wheelchair has important significance and can generate great social benefits.

SUMMERY OF THE UTILITY MODEL

The wheelchair comprises a wheelchair body, a power supply and a power supply, wherein the power supply is connected with the power supply through the power supply, and the power supply is connected with the power supply.

In order to achieve the above purpose, the utility model provides a following technical scheme: a wheelchair with bidirectional power supply composite power comprises a wheelchair body, a moving mechanism capable of driving the wheelchair body to move, a battery module used for supplying power to the moving mechanism, and a controller used for controlling the moving mechanism, wherein the battery module comprises a lithium battery, a super capacitor used as an auxiliary power supply of the lithium battery, and a bidirectional direct-current power supply converter DC/DC connected between the lithium battery and the super capacitor;

the moving mechanism comprises a driving wheel and a following wheel which are rotatably connected to the bottom of the wheelchair body, and a crawler body which is rotatably connected to the driving wheel and the following wheel, the driving wheel and the following wheel are axially arranged in parallel, the two driving wheels are respectively positioned at the front end and the rear end of the wheelchair body, at least two following wheels are arranged, each following wheel is positioned between the two driving wheels, the bottom of the wheelchair body is rotatably connected with a swing arm for mounting the driving wheel, one end of the swing arm is hinged with the wheelchair body, the other end of the swing arm is rotatably connected with the following wheel, and a first driver for driving the swing arm to rotate around the hinged part of the swing arm and the wheelchair body is arranged between the swing arm and the wheelchair body; when the swing arm is unfolded downwards, the track body positioned between the driving wheel and the follow-up wheel can form an included angle with the ground; when the swing arm is folded upwards, the track body positioned between the driving wheel and the follow-up wheel can be attached to the ground.

The utility model discloses further set up to: at least one driving wheel is connected on the wheelchair body in a sliding mode, the sliding direction of the driving wheel on the wheelchair body is the length direction of the wheelchair body, a second driver used for driving the driving wheel to slide is arranged on the wheelchair body, the second driver drives the driving wheel to approach to another driving wheel to slide after the swing arm is unfolded downwards, and the second driver drives the driving wheel to keep away from the other driving wheel to slide after the swing arm is folded upwards.

The utility model discloses further set up to: the first driver is including rotating the cylinder of connecting between swing arm and wheelchair body, the second driver is including setting up the actuating arm on the swing arm and connecting the linking arm between actuating arm and drive wheel, the actuating arm is fixed into the contained angle setting with the swing arm, the both ends of linking arm are connected with actuating arm and drive wheel rotation respectively, and the actuating arm can drive the drive wheel and be close to another drive wheel and slide through pulling the linking arm when the swing arm is launched downwards, and the actuating arm can drive the drive wheel and keep away from to slide to another drive wheel through promoting the linking arm when the swing arm upwards draws in.

The utility model discloses further set up to: the wheelchair comprises a wheelchair body, a swinging arm, a mounting frame, at least two follow-up wheels and at least two wheels, wherein the end, far away from the wheelchair body, of the swinging arm is rotatably connected with the mounting frame, the mounting frame is used for the follow-up wheels to be rotatably connected, the middle of the mounting frame is rotatably connected with the end part of the swinging arm, and the mounting frame is at least rotatably connected.

The utility model discloses further set up to: the wheelchair comprises a wheelchair body and is characterized in that a pressing arm capable of pressing on an installation frame after a swinging arm is folded upwards is arranged on the wheelchair body, and an elastic pressing block is arranged at the end part of the pressing arm.

To sum up, the utility model discloses following beneficial effect has: the super capacitor is added into the battery module and serves as an auxiliary power supply of the lithium battery, and the super capacitor is connected with the power battery through the bidirectional direct-current power converter DC/DC. The super capacitor can reduce the impact of impact current on the battery under complex working conditions, and the service life of the battery is prolonged.

The moving mechanism has two working forms, when the first driver drives the swing arm to be in an upward folded state, the crawler body positioned between the driving wheel and the driven wheel is attached to the ground, at the moment, the contact area of the crawler body and the ground is largest, so that obstacles such as low-lying obstacles, stones and the like can be easily coped with, the trafficability of the wheelchair and the driving safety degree are greatly improved, the movement is stable, the accident caused by the toppling of the wheelchair can be effectively avoided, and the use safety and the reliability of a rider can be effectively guaranteed; or drive the swing arm when first driver and be in under the state of expanding downwards, the track body that is located between drive wheel and the trailing wheel becomes the contained angle setting with ground, not only can keep the area of contact on track body and ground, can also raise the wheelchair body, increase the opening at track body both ends, thereby conveniently make the track body correspond obstacles such as stone, steps, the trafficability characteristic of wheelchair has been improved widely, and the safety degree of traveling, and it is steady to remove, can effectively avoid the wheelchair to empty and cause the accident, thereby can effectively ensure person's of taking safety in utilization and reliability.

Drawings

FIG. 1 is a schematic structural view of a wheelchair;

FIG. 2 is a schematic structural view of the swing arm of the moving mechanism in an unfolded state;

fig. 3 is a schematic structural view of the moving mechanism in a state that the swing arms are folded.

Reference numerals: 1. a wheelchair body; 2. a moving mechanism; 21. a drive wheel; 22. a follower wheel; 23. a track body; 24. a swing arm; 241. a drive arm; 25. a cylinder; 26. a connecting arm; 27. a mounting frame; 28. pressing the arm; 281. an elastic pressing block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1-3, a wheelchair with bidirectional power supply hybrid power comprises a wheelchair body 1, a moving mechanism 2 capable of driving the wheelchair body 1 to move, a battery module for supplying power to the moving mechanism 2, and a controller for controlling the moving mechanism 2, wherein the battery module comprises a lithium battery, a super capacitor for serving as an auxiliary power supply of the lithium battery, and a bidirectional direct-current power supply converter DC/DC connected between the lithium battery and the super capacitor; the controller is a known technology and adopts a common design, wherein the anode materials for the power lithium battery in the battery module mainly comprise lithium manganate, lithium nickelate, lithium iron phosphate and the like, and the materials all have the problems of unsatisfactory high-rate charge-discharge cycle performance and the like, and particularly the service life of the controller is seriously shortened by absorbing and releasing instantaneous large current. Super capacitors have a higher specific power and a longer service life than batteries, but their specific energy is lower and cannot store enough energy. The power lithium battery and the super capacitor hybrid battery pack which combine the advantages and the disadvantages of two power supplies are reasonable devices for solving high power and high energy density. The super capacitor is added into the battery module and serves as an auxiliary power supply of the lithium battery, and the super capacitor is connected with the power battery through the bidirectional direct-current power converter DC/DC. The super capacitor can reduce the impact of impact current on the battery under complex working conditions, and the service life of the battery is prolonged.

When the electric quantity of the super capacitor is insufficient, the lithium battery drives the motor to supplement by using the output redundant electric power, the lithium battery drives the super capacitor to only provide peak power required by vehicle acceleration and climbing, and meanwhile, braking energy is recovered. The high-power lithium battery and the high-voltage super capacitor are connected together through the bidirectional switch, so that the characteristics of the super capacitor can be fully exerted, and the high energy and the high power are well combined. The high energy density and the high cycle service life of the lithium power battery are fully utilized, and the high power density and the extraordinary charging and discharging times of the super capacitor are fully utilized. The portable hybrid battery pack has high power and large energy output capability. Considerable fluctuations in charging voltage and current can be tolerated. Because the super capacitor can be used as energy filtering, instantaneous power grid fluctuation and fluctuation current fed back by the energy of the electric vehicle are completely stored by the capacitor. The power lithium battery can be effectively protected, and the overall safety of the battery pack is improved. The stability and convenience of electric energy supply can be fully ensured. Due to the presence of the super capacitor, variations to the load or fluctuations in voltage can be completely overcome. The start-up process, or the process of connecting to the grid, can reach full power output in a matter of tens of seconds.

When the load gradually reduces the power or suddenly stops working, the load can send current to charge the battery and the capacitor. Therefore, by arranging the bidirectional direct-current power supply converter DC/DC, the dynamic response of system charge and discharge is improved, the charge and discharge voltage and current parameters are conveniently and flexibly adjusted, and the impact of impact current on the battery under complex working conditions is reduced; the bidirectional power supply dynamic response current limiting system is adopted, so that the currents of the battery module in a discharging state and a charging state can be respectively limited, the battery module is better protected, and the service life of the battery module is prolonged.

The moving mechanism 2 comprises a driving wheel 21 and a following wheel 22 which are rotatably connected to the bottom of the wheelchair body 1, and a track body 23 which is rotatably connected to the driving wheel 21 and the following wheel 22, the driving wheel 21 and the following wheel 22 are axially arranged in parallel, two driving wheels 21 are arranged, the two driving wheels 21 are respectively arranged at the front end and the rear end of the wheelchair body 1, at least two following wheels 22 are arranged, each following wheel 22 is arranged between the two driving wheels 21, the bottom of the wheelchair body 1 is rotatably connected with a swing arm 24 for mounting the driving wheel 21, one end of the swing arm 24 is hinged to the wheelchair body 1, the other end of the swing arm is rotatably connected with the following wheel 22, and a first driver for driving the swing arm 24 to rotate around the hinged part of the wheelchair body 1 is arranged between the swing; when the swing arm 24 is unfolded downwards, the track body 23 between the driving wheel 21 and the follower wheel 22 can be arranged at an included angle with the ground; when the swing arm 24 is folded upward, the track body 23 between the driving wheel 21 and the follower wheel 22 can be disposed to be in contact with the ground.

The moving mechanism 2 has two working states, when the first driver drives the swing arm 24 to be in an upward folding state, the crawler body 23 between the driving wheel 21 and the follow-up wheel 22 is attached to the ground, at the moment, the contact area of the crawler body 23 and the ground is the largest, so that obstacles such as low-lying obstacles, stones and the like can be easily coped with, the passing performance of the wheelchair and the driving safety degree are greatly improved, the movement is stable, the accident caused by the toppling of the wheelchair can be effectively avoided, and the use safety and the reliability of a rider can be effectively guaranteed; or when first driver drives swing arm 24 and is in under the state of expanding downwards, the track body 23 that is located between drive wheel 21 and the trailing wheel 22 becomes the contained angle setting with ground, not only can keep the area of contact of track body 23 and ground, can also raise wheelchair body 1, increase the opening at track body 23 both ends, thereby conveniently make track body 23 reply obstacles such as stone, step, the trafficability characteristic of wheelchair has been improved widely, and the safety degree of traveling, and it is steady to remove, can effectively avoid the wheelchair to topple over and cause the accident, thereby can effectively ensure the safety in utilization and the reliability of person of taking.

At least one driving wheel 21 is connected on the wheelchair body 1 in a sliding manner, the sliding direction of the driving wheel 21 on the wheelchair body 1 is the length direction of the wheelchair body 1, a second driver for driving the driving wheel 21 to slide is arranged on the wheelchair body 1, when the swing arm 24 is unfolded downwards, the second driver drives the driving wheel 21 to approach to another driving wheel 21 to slide, and when the swing arm 24 is folded upwards, the second driver drives the driving wheel 21 to move away from the other driving wheel 21 to slide. Swing arm 24 has changed the mode of setting of track body 23 when changing into the state of upwards drawing in from the downward expansion, and track body 23 is in lax state this moment, for avoiding track body 23 to drop, consequently sets up the second driver and drives drive wheel 21 and remove to the direction of keeping away from another drive wheel 21 to can realize the tensioning with track body 23, effectively avoid track body 23 to drop, be favorable to improving the operation stability of moving mechanism 2 when swing arm 24 upwards draws in.

In addition, the design structure for avoiding the falling of the crawler body 23 can also be used for avoiding the falling of the crawler body 23 by performing a limiting anti-falling design at the joint of the driving wheel 21 and the crawler body 23.

The first driver comprises a cylinder 25 which is rotatably connected between a swing arm 24 and the wheelchair body 1, the second driver comprises a driving arm 241 arranged on the swing arm 24 and a connecting arm 26 connected between the driving arm 241 and the driving wheel 21, the driving arm 241 and the swing arm 24 are fixed to form an included angle, two ends of the connecting arm 26 are respectively rotatably connected with the driving arm 241 and the driving wheel 21, when the swing arm 24 is unfolded downwards, the driving arm 241 can drive the driving wheel 21 to approach to another driving wheel 21 to slide by pulling the connecting arm 26, and when the swing arm 24 is folded upwards, the driving arm 241 can drive the driving wheel 21 to move away from the other driving wheel 21 to slide by pushing the connecting. Above-mentioned structural design is ingenious, can do effective combination with first driver and second driver, realizes that two kinds of operation forms of swing arm 24 and two kinds of operation forms of drive wheel 21 are effective combination to only need a cylinder 25 just can realize, not only be favorable to improving moving mechanism 2's the stable degree of use, also greatly reduced moving mechanism 2's assembly cost and cost of maintenance.

The end of the swing arm 24 far away from the wheelchair body 1 is rotatably connected with a mounting frame 27 for rotatably connecting the follower wheels 22, the middle part of the mounting frame 27 is rotatably connected with the end part of the swing arm 24, and at least two follower wheels 22 are rotatably connected on the mounting frame 27 along the length direction thereof. The mounting bracket 27 is provided to increase the number of the follower wheels 22 while reducing the number of the swing arms 24, which is advantageous for improving the stability of the traveling mechanism 2 during operation.

The wheelchair body 1 is provided with a pressing arm 28 which can be pressed against the mount frame 27 after the swing arm 24 is folded upward, and an elastic pressing block 281 is provided at an end of the pressing arm 28. The pressing arm 28 can be used for limiting the upward moving stroke of the mounting frame 27, so that the follower wheel 22 can be effectively abutted against the track body 23 in a state that the swing arm 24 is folded upwards, and the stability of the moving mechanism 2 in operation is improved; meanwhile, the elastic pressing block 281 can be made of rubber and can play a role in buffering and shock absorption.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a wheelchair with two way power supply combined power, including wheelchair body (1) and can drive moving mechanism (2) that wheelchair body (1) removed with be used for to the battery module of moving mechanism (2) power supply and be used for controlling the controller of moving mechanism (2), characterized by: the battery module comprises a lithium battery, a super capacitor used as an auxiliary power supply of the lithium battery, and a bidirectional direct-current power converter DC/DC connected between the lithium battery and the super capacitor;

the moving mechanism (2) comprises a driving wheel (21) and a following wheel (22) which are rotatably connected to the bottom of the wheelchair body (1) and a crawler body (23) which is rotatably connected to the driving wheel (21) and the following wheel (22), the driving wheel (21) and the following wheel (22) are axially arranged in parallel, the driving wheel (21) is provided with two driving wheels (21), the two driving wheels (21) are respectively arranged at the front end and the rear end of the wheelchair body (1), the following wheel (22) is at least provided with two following wheels, each following wheel (22) is arranged between the two driving wheels (21), the bottom of the wheelchair body (1) is rotatably connected with a swing arm (24) for mounting the driving wheel (21), one end of the swing arm (24) is hinged with the wheelchair body (1), the other end of the swing arm is rotatably connected with the following wheel (22), and a driving swing arm (24) is arranged between the swing arm (24) and the wheelchair body (1) and used for A first driver for rotating the hinge; when the swing arm (24) is unfolded downwards, the track body (23) between the driving wheel (21) and the follow-up wheel (22) can form an included angle with the ground; when the swing arm (24) is folded upwards, the track body (23) between the driving wheel (21) and the follow-up wheel (22) can be attached to the ground.

2. The wheelchair of claim 1 having bi-directional power source combined power, wherein: at least one drive wheel (21) is connected on wheelchair body (1) in a sliding manner, and the slip direction of drive wheel (21) on wheelchair body (1) is the length direction of wheelchair body (1), be provided with the second driver that is used for driving drive wheel (21) to slide on wheelchair body (1), second driver drives drive wheel (21) and is close to another drive wheel (21) and slides after swing arm (24) expand downwards, and the second driver drives drive wheel (21) and keeps away from to another drive wheel (21) and slides after swing arm (24) upwards draw in.

3. The wheelchair of claim 2 having bi-directional power source combined power, wherein: the first driver comprises a cylinder (25) which is rotatably connected between a swing arm (24) and the wheelchair body (1), the second driver comprises a driving arm (241) arranged on the swing arm (24) and a connecting arm (26) connected between the driving arm (241) and a driving wheel (21), the driving arm (241) and the swing arm (24) are fixed to form an included angle, two ends of the connecting arm (26) are respectively rotatably connected with the driving arm (241) and the driving wheel (21), when the swing arm (24) is unfolded downwards, the driving arm (241) can drive the driving wheel (21) to slide towards the other driving wheel (21) by pulling the connecting arm (26), and when the swing arm (24) is folded upwards, the driving arm (241) can drive the driving wheel (21) to move away from the other driving wheel (21) by pushing the connecting arm (26).

4. A wheelchair with a bi-directional power source hybrid according to any one of claims 1 to 3, wherein: one end, far away from the wheelchair body (1), of the swing arm (24) is rotatably connected with a mounting frame (27) for the follow-up wheels (22) to be rotatably connected, the middle of the mounting frame (27) is rotatably connected with the end part of the swing arm (24), and the mounting frame (27) is at least rotatably connected with the two follow-up wheels (22) along the length direction of the mounting frame.

5. The wheelchair of claim 4 having bi-directional power source combined power, wherein: the wheelchair comprises a wheelchair body (1), and is characterized in that a pressing arm (28) capable of pressing on a mounting frame (27) after a swinging arm (24) is folded upwards is arranged on the wheelchair body (1), and an elastic pressing block (281) is arranged at the end part of the pressing arm (28).