CN2917606Y

CN2917606Y - Wheelchairs that can go up and down stairs

Info

Publication number: CN2917606Y
Application number: CN 200620060817
Authority: CN
Inventors: 张铁坚; 李丽金; 李克天; 刘吉安; 尹映霞
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2006-06-26
Filing date: 2006-06-26
Publication date: 2007-07-04
Anticipated expiration: 2016-06-26

Abstract

The utility model discloses a wheelchair that can go up and down stairs. The walking wheels are installed on both sides of the vehicle frame, the universal wheels are installed on the rear bottom of both sides of the vehicle frame, horizontal guide rails are respectively installed on the upper sides of the vehicle frame, and the connecting plate passes through the wheelchair. The horizontal slider is connected with the horizontal guide rail; the vertical guide rail and the screw support seat are installed on the vertical direction of the connecting plate, and the screw support seat is equipped with a screw rod, and the seat is respectively connected with the vertical guide rail and the screw rod on the connecting plate through the vertical slide block and the nut; The lower ends of the screw rods are respectively equipped with sprockets and connected by chains; the lifting hand wheel is connected to the upper end of the right screw rod, the motor drive device is installed on the connecting plate, the clutch device is installed at the end of the right screw rod and connected to the motor drive device through a belt. The front bottom of the frame is equipped with a bendable front wheel frame, and the bendable front wheel frame is equipped with front wheels; it realizes the function of wheelchair climbing stairs, which can be driven manually or by motor, which is safe and comfortable, saving time and effort.

Description

Wheelchair that can stair activity

Technical field

This utility model relates to a kind of can walking on the level land, wheelchair that also can stair activity.

Background technology

For old person and lower limb the disabled, wheelchair is their requisite walking-replacing tool.But, because common wheelchair does not have the function of stair climbing, thereby having limited the range of activity of its user widely, the degree of depth and the range that make it participate in society are influenced deeply.The patent of at present domestic existing many kinds of stair climbing wheelchairs, the wheelchair of 00244147.0 1 kinds of energy stair activities of Chinese patent is made up of upper body that can relatively move in the horizontal direction and lower body; Upper and lower car body respectively has 4 steamboat bar moving up and down/supporting leg bar and seat bar, adds the alternately lifting of 8 steamboat bar/supporting leg bars and seat bar owing to slide in upper and lower car body front and back in the horizontal direction, and wheelchair just can be finished the action of upper and lower stair.Chinese patent 02251782.0 stair activity multifunctional wheelchair comprises wheelchair, stair activity mechanism, direction control mechanism and chain drive system, hydraulic pressure support system, stair activity mechanism is made of planet circular system, by clutch from the function conversion that realizes level walking and stair activity, be provided with direction control mechanism, can when stair activity, realize direction control, the rotation of supporting leg before and after the hydraulic system of wheelchair can realize, the length and the gradient of regulating wheelchair.Chinese patent 93209301.9 manual stair climbing wheelchairs comprise wheelchair, the vehicle frame supporting system, cat ladder bar and drive mechanism, the cat ladder bar is that two respectively has one: the rigid member of " foot ", the wheelchair both sides respectively have one, pass through crank, hinge pin and framework link and are connected into parallelogram lindage, form a cover auxiliary supporting system, during stair climbing, synchronous rotation along with crank, two cover supporting systems take turns to land (step surface), and take turns another set of supporting system raised and deliver to step to a new level, until having climbed one section step, the occupant can walk on level land and slope, can lean on bimanualness stair activity alone again and so forth.

In sum, at present domestic and international said apparatus specifically can be divided into three kinds of mechanisms: a kind of is the rubber caterpillar type transmission, stair are used as approximate inclined-plane, but structure is huge, and load capacity is not strong, and function singleness, only is fit to go upstairs, and is not suitable for the level land and walks.Second kind is the pocket-wheel structure, and stability is bad, and the problem of vertical tremor is arranged.The third is a hoisting type, utilize lifting drive and guide rail driving device, by last, slide and add the alternately lifting of 8 support bars in the front and back of lower body on the wheelchair direction of advance, finish, the action of going downstairs, though solved the to tilt problem of certain angle of chair when going upstairs like this, but to control the rising or the decline of 4 support bars wherein simultaneously, complex structure not only, use eight lifting drives, the control difficulty, mechanical quality of fit requires high, when level road is walked, 8 support bars not only are in the way, no matter influence attractive in appearancely, and still be the occupant to the nursing staff, all exists potential safety hazard.

Summary of the invention

The purpose of this utility model provides a kind ofly both can be used on level road, but the also wheelchair of stair activity.This utility model is achieved through the following technical solutions, a kind of wheelchair that can stair activity, road wheel is installed in the back bottom that vehicle frame both sides, universal wheel are installed in the vehicle frame both sides, and horizontal guide rail respectively is equipped with in the top of vehicle frame both sides, and connecting plate is connected with horizontal guide rail by cross sliding clock; Connecting plate moves forward and backward along horizontal guide rail by cross sliding clock; Vertical guide rail and Screw rod bearings seat are housed on the vertical direction of connecting plate; The Screw rod bearings seat is equipped with screw rod, seat by vertical slipper and nut respectively with connecting plate on vertical guide rail be connected with screw rod, the two screw rods lower end is equipped with sprocket wheel respectively and is connected by chain; The lifting handwheel is connected with right side screw rod upper end, motor driver is installed on the connecting plate, clutch apparatus is installed in the terminal of right side screw rod and is connected with motor driver by belt, and bent front wheel carrier is equipped with in the bottom before the vehicle frame, and bent front wheel carrier is equipped with front-wheel.But above-mentioned bent front wheel carrier is the four-bar mechanism of self-locking.The bottom is and the corresponding concave shaped of stair before the above-mentioned vehicle frame.Above-mentioned seat is equipped with press button.On the above-mentioned connecting plate regulating wheel is installed, the regulating wheel tension chain.

The beneficial effects of the utility model are, utilize bolt and nut to drive seat and vertically move, and horizontal guide rail and cross sliding clock make seat move horizontally, and realize the function of wheelchair stair climbing.Utilize the self-lock mechanism of four-bar mechanism, make front-wheel that the bending function be arranged, switch when making things convenient for level walking and stair climbing, but this wheelchair can be manually also motor-driven.

Description of drawings

Fig. 1 is this utility model perspective view when implementing to go upstairs;

Fig. 2 is a front-view schematic diagram of the present utility model;

Fig. 3 is that this utility model is looked sketch map in a left side when implementing to go upstairs;

Fig. 4 is a perspective view of the present utility model;

Fig. 5 is the inner perspective view of this utility model.

1, lifting handwheel 2, seat 3, road wheel 4, connecting plate 5, front-wheel 6, bent front wheel carrier 7, vehicle frame 8, horizontal guide rail 9, vertical guide rail 10, Screw rod bearings seat 11, motor driver 12, clutch apparatus 13, screw rod 14, press button 15, nut 16, universal wheel 17, sprocket wheel chain 18, regulating wheel 19, cross sliding clock 20, vertical slipper

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Bent front wheel carrier stretched when level road was walked, front-wheel land and common wheelchair as broad as long.

When going upstairs, 1, seat 2 slides into the forefront of vehicle frame 7, lifting handwheel 1 or motor driver 11 rotating screw bolts 13 descend seat 2 and land, and vehicle frame 7 and universal wheel 16 are risen.2, vehicle frame 7 is to the front slide one-level stair degree of depth.3, drive screw 13 backward rotation land the vehicle frame 7 of the one-level stair that risen, continue the height that backward rotation makes seat 2 rising one-level stair.4, seat 2 is to the front slide one-level stair degree of depth.5, seat 2 descends and lands, and finishes a circulation of going upstairs, and so continues circulation, just can reach the purpose of going upstairs step by step.Behind the stair top layer, universal wheel 16 is landed 6 stretching, extensions of bent front wheel carrier last, wheelchair just can move on the level land again.When going downstairs, can be with each the reverse enforcement of above-mentioned mistake.

Claims

1. A wheelchair that can go up and down stairs. The walking wheels are installed on both sides of the frame, and the universal wheels are installed on the rear bottom of both sides of the frame. It is characterized in that horizontal guide rails and connecting plates are installed on both sides of the frame It is connected with the horizontal guide rail through the horizontal slider; the vertical guide rail and the screw support seat are installed on the vertical direction of the connecting plate, and the screw support seat is equipped with a screw rod, and the seat is respectively connected with the vertical guide rail and the screw rod on the connecting plate through the vertical slide block and the nut; The lower ends of the two screws are respectively equipped with sprockets and connected by chains; the lifting handwheel is connected with the upper end of the right screw, the motor drive device is installed on the connecting plate, the clutch device is installed at the end of the right screw rod and connected with the motor drive device through a belt, The front bottom of the vehicle frame is provided with a bendable front wheel frame, and the bendable front wheel frame is equipped with a front wheel.

2. The wheelchair capable of going up and down stairs according to claim 1, wherein the bendable front wheel frame is a self-locking four-bar mechanism.

3. The wheelchair capable of going up and down stairs according to claim 1, characterized in that: the front bottom of the vehicle frame is in a concave shape corresponding to the stairs.

4. The wheelchair capable of going up and down stairs according to claim 1, characterized in that: said seat is equipped with a button switch.

5. The wheelchair capable of going up and down stairs according to claim 1, characterized in that: a tensioning wheel is installed on the connecting plate, and the tensioning wheel tightens the chain.