CN211023589U

CN211023589U - Wheelchair lifting device

Info

Publication number: CN211023589U
Application number: CN201921962675.9U
Authority: CN
Inventors: 章国潇; 潘琼洲; 杜龙龙; 王荣扬
Original assignee: Huzhou Vocational and Technical College
Current assignee: Huzhou Vocational and Technical College
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-07-17
Anticipated expiration: 2029-11-14

Abstract

The utility model belongs to the technical field of the wheelchair, a wheelchair hoisting device is disclosed, it includes wheelchair frame, front wheel carrier, a pair of front wheel and a pair of rear wheel, the rear wheel rotates to be connected in the wheelchair frame, the front wheel rotates to be connected in the front wheel carrier tip, its characterized in that, the wheelchair hoisting device still includes first driving piece and strutting arrangement, the front wheel carrier rotates to be connected in the wheelchair frame, the first driving piece sets up on the wheelchair frame and its output connects the front wheel carrier, in order to drive the front wheel carrier around the swing of wheelchair frame; the supporting device comprises a first electric push rod, and the fixed end of the first electric push rod is hinged to the wheelchair frame and is located behind the rear wheel. The wheelchair lifting device can facilitate the wheelchair to cross steps, and the moving range of the wheelchair is enlarged.

Description

Wheelchair lifting device

Technical Field

The utility model relates to a wheelchair technical field especially relates to a wheelchair hoisting device.

Background

The wheelchair brings great convenience to patients and the lower limb disabled, in particular to an electric wheelchair. However, most electric wheelchairs in the market are only suitable for running on flat ground, and have poor obstacle crossing capability. When a user drives the electric wheelchair to travel on a pedestrian path of a city and wants to do business or shop, the user keeps the electric wheelchair out of the pedestrian path in front of doors of offices and shops indiscriminately. When a person sitting on the wheelchair encounters a place without a slope and with steps, the person with inconvenient legs and feet is difficult to lift the front wheel into the wheelchair and can cross the steps to enter the wheelchair by the aid of outsiders. If nobody helps him, he cannot get inside. There is also a limit to where people with impaired legs and feet can reach with a wheelchair. It is difficult to leave access for the disabled to wheelchair users in these societies for a long time according to national laws. Only wheelchairs which can cross steps are expected to expand the range of movement of wheelchair users. Generally, the steps in front of the peripheral shop doors or other public places are mostly only one step and are not very high, and the height is generally about 10 cm. The range of motion, the handling capacity and the quality of life of the wheelchair user can be increased by times in a breakthrough way as long as the wheelchair user crosses the step. The use value of the wheelchair is greatly improved.

Accordingly, there is a continuing need for a wheelchair lifting device that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wheelchair hoisting device can make things convenient for the wheelchair to stride across the step, increases the home range of wheelchair.

To achieve the purpose, the utility model adopts the following technical proposal: a wheelchair lifting device comprises a wheelchair frame, a front wheel frame, a pair of front wheels and a pair of rear wheels, wherein the rear wheels are rotationally connected with the wheelchair frame; the supporting device comprises a first electric push rod, and the fixed end of the first electric push rod is hinged to the wheelchair frame and is located behind the rear wheel.

Preferably, the wheelchair lifting device further comprises a controller and a switch, the first driving piece and the first electric push rod are both electrically connected with the controller, and the switch is electrically connected with the controller.

Preferably, the supporting device further comprises a supporting leg hinged to the free end of the first electric push rod.

Preferably, the bottom of the supporting leg is provided with a rubber non-slip mat, and the bottom surface of the rubber non-slip mat is provided with anti-slip patterns or anti-slip bulges.

Preferably, the first driving member is a motor.

Preferably, the wheelchair lifting device further comprises an auxiliary wheel assembly including a wheel coupled to the wheelchair frame in a liftable and lowerable manner, the auxiliary wheel assembly being configured to support the wheelchair frame when the front wheel frame swings forward.

Preferably, the auxiliary wheel assembly is located between the front wheel and the rear wheel, and adjacent to the front wheel.

Preferably, the auxiliary wheel assembly comprises a second driving part and an auxiliary wheel, the second driving part is arranged on the wheelchair frame, the auxiliary wheel is rotatably connected to the output end of the second driving part, and the second driving part is configured to drive the auxiliary wheel to lift.

Preferably, the second driving member is a second electric push rod, and the auxiliary wheel is rotatably connected to a free end of the second electric push rod.

The utility model has the advantages that: the utility model provides a wheelchair lifting device, which is provided with a first driving piece and a supporting device, wherein a front wheel carrier is rotationally connected with a wheelchair frame, the first driving piece is arranged on the wheelchair frame, and the output end of the first driving piece is connected with the front wheel carrier so as to drive the front wheel carrier to swing around the wheelchair frame; the supporting device comprises a first electric push rod, and the fixed end of the first electric push rod is hinged to the wheelchair frame and is positioned behind the rear wheel. When the wheelchair encounters a step, the first electric push rod firstly descends to be close to the ground, the user leans backwards, the gravity center of the wheelchair falls at the position behind the rear wheel, and the wheelchair is supported through the rear wheel and the supporting device; meanwhile, the first driving piece drives the front wheel frame to swing forwards until the front wheel is raised to a proper height, and the length and the angle of the first electric push rod at the rear part are adjusted adaptively along with the lifting of the front wheel; the rear wheel drives the wheelchair to move forwards, the front wheel falls on the step and moves forwards along with the front wheel, the supporting device extends along the forward movement of the wheelchair and performs angle adjustment, and when the rear wheel moves to the step, the supporting device continuously extends to provide a backward and forward thrust for the rear wheel, so that the wheelchair can more easily cross the step. The wheelchair lifting device can facilitate the wheelchair to cross steps, and the moving range of the wheelchair is enlarged.

Drawings

FIG. 1 is a schematic view of a wheelchair lifting device provided in the present invention in a first state;

FIG. 2 is a schematic view of a wheelchair lifting device provided in the present invention in a second state;

FIG. 3 is a third state diagram of the wheelchair lifting apparatus provided by the present invention;

FIG. 4 is a fourth state diagram of the wheelchair lifting apparatus provided by the present invention;

fig. 5 is a schematic view of a fifth state of the wheelchair lifting apparatus provided by the present invention.

In the figure: 1. a wheelchair frame; 2. a front wheel carrier; 3. a front wheel; 4. a rear wheel; 5. a first driving member; 6. a support device; 61. a first electric push rod; 62. supporting legs; 63. a hinged seat; 7. a controller; 8. a switch; 9. an auxiliary wheel assembly; 91. a second driving member; 92. and (7) auxiliary wheels.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The present embodiment provides a wheelchair lifting device, as shown in fig. 1-5, the wheelchair lifting device includes a wheelchair frame 1, a front wheel frame 2, a pair of front wheels 3 and a pair of rear wheels 4, the rear wheels 4 are rotatably connected to the wheelchair frame 1, the front wheels 3 are rotatably connected to the end of the front wheel frame 2, the wheelchair lifting device further includes a first driving member 5 and a supporting device 6, the front wheel frame 2 is rotatably connected to the wheelchair frame 1, the first driving member 5 is disposed on the wheelchair frame 1, and the output end of the first driving member is connected to the front wheel frame 2, so as to drive the front wheel frame 2 to swing around the wheelchair frame 1; the supporting device 6 comprises a first electric push rod 61, and the fixed end of the first electric push rod 61 is hinged to the wheelchair frame 1 and is positioned behind the rear wheel 4.

When a step is met, the first electric push rod 61 firstly descends to be close to the ground, at the moment, a user leans backwards, the gravity center of the wheelchair falls at the position behind the rear wheel 4, and the wheelchair is supported by the rear wheel 4 and the supporting device 6; meanwhile, the first driving part 5 drives the front wheel frame 2 to swing forwards until the front wheel 3 is raised to a proper height, and the first electric push rod 61 at the rear part adaptively adjusts the length and the angle along with the lifting of the front wheel 3; then the rear wheel 4 is driven by the driving device to rotate, the wheelchair is driven to move forwards, the front wheel 3 falls on the step and moves forwards along with the step, the supporting device 6 extends along the forward movement of the wheelchair and carries out angle adjustment, and when the rear wheel 4 moves to the step, the supporting device 6 continuously extends to provide a thrust from back to front for the rear wheel 4, so that the wheelchair can more easily cross the step. The wheelchair lifting device can facilitate the wheelchair to cross steps, and the moving range of the wheelchair is enlarged.

In this embodiment, the first driving member 5 may be a motor, or may be another driving member capable of rotating the front wheel frame 2 relative to the wheelchair frame 1.

In order to realize the electromotion of the wheelchair, the wheelchair lifting device further comprises a controller 7 and a switch 8, the first driving piece 5 and the first electric push rod 61 are both electrically connected with the controller 7, and the switch 8 is electrically connected with the controller 7. The controller 7 is also connected to the drive of the rear wheels 4. When the wheelchair encounters a step, a user can start the switch 8, and the control chip in the controller 7 controls the actions of the first driving part 5, the first electric push rod 61 and the driving device of the rear wheel 4 through the compiled program, so that the ordered actions of the step climbing process are realized.

The supporting device 6 needs to have an effective supporting function, in order to avoid the unsafety of using the wheelchair caused by the sliding between the supporting device 6 and the ground, the supporting device 6 further comprises a supporting leg 62, and the supporting leg 62 is hinged to the free end of the first electric push rod 61. The supporting foot 62 has a larger contact area with the ground, so that the friction between the supporting foot 62 and the ground can be increased, and the supporting foot can be prevented from sliding on the ground; and the supporting leg 62 is hinged to the free end of the first electric push rod 61 through a hinge base 63, so that the supporting leg 62 can always maintain an effective contact area with the ground when the angle of the first electric push rod 61 changes due to the movement of the wheelchair.

In order to further improve the anti-slip performance of the supporting feet 62, the bottom of the supporting feet 62 is provided with a rubber non-slip mat, and the bottom surface of the rubber non-slip mat is provided with anti-slip patterns or anti-slip bulges. The rubber non-slip mat plays effective antiskid on the one hand, and on the other hand, because rubber has certain elastic deformation ability, can make supporting legs 62 alleviate relative impact force between the two in the twinkling of an eye with ground contact, reduce user's uncomfortable and feel, protect supporting legs 62 and ground simultaneously.

When the wheelchair lifting device crosses a step, the center of gravity needs to be adjusted backwards firstly, and the supporting device 6 and the rear wheel 4 support together, so that the supporting force between the front wheel 3 and the ground is removed, and the front wheel frame 2 is convenient to lift forwards. However, in order to avoid the situation that the user does not lean backward in time and the center of gravity of the wheelchair is still in the forward position when the front wheel frame 2 is lifted forward, which causes the wheelchair to lean forward, in this embodiment, the wheelchair lifting device may further include an auxiliary wheel assembly 9, the auxiliary wheel assembly 9 includes a lifting/lowering connection to the wheelchair frame 1, and the auxiliary wheel assembly 9 is configured to support the wheelchair frame 1 when the front wheel frame 2 swings forward. The sub-wheel assembly 9 is located between the front wheel 3 and the rear wheel 4, and near the front wheel 3. The auxiliary wheel assembly 9 and the rear wheel 4 support together, the wheelchair is prevented from inclining forwards, the front wheel frame 2 is convenient to lift forwards, meanwhile, the supporting device 6 prevents the wheelchair from inclining backwards, and the auxiliary wheel assembly 9 and the supporting device 6 can effectively guarantee the stability of the wheelchair under the combined action.

Specifically, the auxiliary wheel assembly 9 includes a second driving member 91 and an auxiliary wheel 92, the second driving member 91 is disposed on the wheelchair frame 1, the auxiliary wheel 92 is rotatably connected to an output end of the second driving member 91, and the second driving member 91 is configured to drive the auxiliary wheel 92 to move up and down. The second driving member 91 is electrically connected to the controller 7. The second driving member 91 may be a second electric push rod, and the auxiliary wheel 92 is rotatably connected to a free end of the second electric push rod. Before the front wheel 3 is lifted, the controller 7 controls the second electric push rod to extend, so that the auxiliary wheel 92 is contacted with the ground and supports the wheelchair together with the rear wheel 4.

The specific working process of the wheelchair lifting device provided by the embodiment is as follows:

the wheelchair is supported by front wheels 3 and rear wheels 4 in an initial state, and the rear wheels 4 drive the wheelchair to move to a step position, which is shown in a state of reference figure 1; subsequently, referring to fig. 2, the user toggles the switch 8, the controller 7 controls the first electric push rod 61 to push out, the supporting leg 62 is supported on the ground to prevent the wheelchair from tilting backwards, and simultaneously the controller 7 controls the second electric push rod to push out, so that the auxiliary wheel 92 is supported on the ground to prevent the wheelchair from tilting forwards; then the controller 7 controls the first driving part 5 to drive the front wheel frame 2 to swing forwards, the front wheel 3 is lifted to a proper height, then the rear wheel 4 drives the wheelchair to move forwards until the front wheel 3 is supported on the step surface, the controller 7 controls the auxiliary wheel 92 to retract, the rear wheel 4 continuously rolls forwards, and the first electric push rod 61 extends along with the first electric push rod and adjusts the angle until the state shown in fig. 3; further, as shown in fig. 4, the rear wheel 4 rolls to jump up the steps, and the first electric push rod 61 continuously extends to provide a thrust from back to front for the rear wheel 4, so that the wheelchair can more easily jump over the steps; when the rear wheel 4 jumps up the step, as shown in fig. 5, the controller 7 controls the first driving member 5 to drive the front wheel frame 2 to swing backward to return to the initial position, the first electric push rod 61 retracts to the initial position, and the wheelchair can continue to move forward.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A wheelchair lifting device comprises a wheelchair frame (1), a front wheel frame (2), a pair of front wheels (3) and a pair of rear wheels (4), wherein the rear wheels (4) are rotatably connected to the wheelchair frame (1), the front wheels (3) are rotatably connected to the end part of the front wheel frame (2), the wheelchair lifting device is characterized by further comprising a first driving piece (5) and a supporting device (6), the front wheel frame (2) is rotatably connected to the wheelchair frame (1), the first driving piece (5) is arranged on the wheelchair frame (1), and the output end of the first driving piece is connected with the front wheel frame (2) so as to drive the front wheel frame (2) to swing around the wheelchair frame (1); the supporting device (6) comprises a first electric push rod (61), and the fixed end of the first electric push rod (61) is hinged to the wheelchair frame (1) and located behind the rear wheel (4).

2. The wheelchair lifting device according to claim 1, further comprising a controller (7) and a switch (8), wherein the first driving member (5) and the first electric push rod (61) are electrically connected with the controller (7), and the switch (8) is electrically connected with the controller (7).

3. Wheelchair lifting arrangement according to claim 1, characterized in that the support means (6) further comprise support feet (62), which support feet (62) are hinged to the free end of the first electric push rod (61).

4. Wheelchair lifting device according to claim 3, characterized in that the bottom of the supporting feet (62) is provided with a rubber non-slip mat, the bottom surface of which is provided with a non-slip pattern or a non-slip bulge.

5. Wheelchair lifting arrangement according to claim 1, characterized in that the first drive element (5) is an electric motor.

6. Wheelchair lifting device according to claim 1, further comprising an auxiliary wheel assembly (9), the auxiliary wheel assembly (9) comprising a liftable connection to the wheelchair frame (1), the auxiliary wheel assembly (9) being configured to support the wheelchair frame (1) when the front wheel frame (2) is swung forward.

7. Wheelchair lifting arrangement according to claim 6, characterized in that the auxiliary wheel assembly (9) is located between the front wheel (3) and the rear wheel (4) and close to the front wheel (3).

8. The wheelchair lifting device of claim 6, wherein the auxiliary wheel assembly (9) comprises a second driving member (91) and an auxiliary wheel (92), the second driving member (91) is arranged on the wheelchair frame (1), the auxiliary wheel (92) is rotatably connected to the output end of the second driving member (91), and the second driving member (91) is configured to drive the auxiliary wheel (92) to lift.

9. Wheelchair lifting device according to claim 8, characterised in that the second drive element (91) is a second electric push rod, the auxiliary wheel (92) being rotatably connected to the free end of the second electric push rod.