CN1582873B

CN1582873B - Pneumatic wheeled chair for going on stairs

Info

Publication number: CN1582873B
Application number: CN 03126318
Authority: CN
Inventors: 贾荣显
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-22
Filing date: 2003-08-22
Publication date: 2010-04-28
Anticipated expiration: 2023-08-22
Also published as: CN1582873A

Abstract

A pneumatically boosted wheelchair able to go upstairs or downstairs has a boost system composed of air storage tank, air distribution unit and cylinder, and the compressed air generated by air compressor is used as power source and has two working pressure (1.6 MPa and 2.5 MPa) respectively for lifting up the wheelchair or filling the air in cylinder for vibration damping.

Description

But the wheel Wheel-chair of air assisted stair activity

Technical field

But the present invention relates to a kind of wheel Wheel-chair of air assisted stair activity, belong to the equipment that transports patient or make things convenient for patient.

Technical background

Stay in handicapped in the building of no electric up-down ladder and hinder the patient, needing stair activity to go to accept the diagnosis and treatment meeting meets difficulty, they thirst for often being not being met to the requirement of outdoor activities, but the wheelchair device of known stair activity, as CN2259884Y and the disclosed technology of CN2320234Y, the former realizes its function by motor-driven hydraulic pressure actuating device, the latter realizes its function by the motor-driven mechanical driving device, the two structure is comparatively complicated, and the latter adopts crawler type walking mechanism, when in residential building, using, might give to turn to because of the landing area is narrow and small and bring difficulty.Also have the disclosed technology of CN2451090Y, this utility model be 8 screw mandrel branches of a kind of usefulness do two groups in orbit alternately displacement can stair activities wheelchairs, it is only replied common wheelchair state and just can turn to packing up this stair climbing device.

US Patent specification US4569409A discloses a kind of wheelchair (STAIR CLIMBING WHEELCHAIR) of climbing stair, this invention is done power with accumulator with by the compressed air that its driven air compressor produces, its ingredient is except that seat and framework, accumulator box is arranged, air compressor and incidental gas tank thereof, 10 cylinders, 8 wheels, 8 cover power-jdriven gears and 8 cover detectors, also have steering link gear and a controller that comprises little processing computer, mechanism is complete, and just its steering capability fails correspondingly to make improvements at the specific environment for use of stair climbing wheelchair.

Summary of the invention

The object of the present invention is to provide a kind of compressed air that utilizes to do power, has elevating function, transport the wheel Wheel-chair of hindering patient's stair activity for the nursing staff, and on the level land, if occupant's both hands can autonomic activities, the handwheel Wheel-chair travels voluntarily, improves ability to act, or carries out rehabilitation training.

Above-mentioned purpose is achieved in that the axis of setting up two ends belt wheel below the vehicle frame of wheel Wheel-chair, establish a cylinder between this axle and the vehicle frame, cylinder block installs with vehicle frame, and the affixed axis of the external part of piston rod, like this, but cylinder elevate a turnable ladder wheel Wheel-chair, again can translation under the nursing staff promotes behind the elevate a turnable ladder, when travelling on the level land, cylinder is mentioned axis, make breast wheel keep suitably crack, be beneficial to turn to and improve trafficability characteristic; The wheel Wheel-chair has gas tank and air distributing device, and both and cylinder are formed the air assisted system altogether; The axial line of cylinder is in vertical symmetrical plane of wheel Wheel-chair, and distance parallel with the gravity vertical of wheel Wheel-chair center of gravity under nominal load capacity should be as much as possible little, consider that occupant's body weight difference can make position of centre of gravity change, so axis flatly stretches out a T shape support forward, adorn two universal wheels on this support, gravity vertical drops within breast wheel and four formed tetragons of fulcrum of universal wheel during with assurance wheel Wheel-chair elevate a turnable ladder, establishing guide post above the T shape support rotates with limited piston, make jackshaft and hind axle keeping parallelism, piston rod is also answered overstriking, improves rigidity so that overcome because of increasing the moment of flexure that T shape support brings; The compressed air of gas tank output accesses P through two pressure regulators ₁And P ₂Two kinds of operating pressures, P ₁Greater than P ₂, in the time of upstairs, pressure is P ₁Gas make cylinder produce thrust to take turns Wheel-chair with elevate a turnable ladder, pressure is P ₂Gas make cylinder produce pulling force for piston reset, piston reset is added the consumption that thick piston rod can reduce gas with lower pressure, and the speed when reducing to take turns Wheel-chair and falling after rise, in the time of downstairs, is P with pressure ₂Gas send into the cylinder piston top, piston moves down breast wheel is landed, but the thrust of cylinder is not enough to the wheel Wheel-chair is risen, move forward the wheel Wheel-chair this moment, breast wheel at first drops to next step from a last step, and when trailing wheel moved to the top of next step, the weight of car load was fallen on the breast wheel, gas in the cylinder is compressed, when gas pressure surpasses operating pressure P ₂After the certain numerical value, the overflow valve that is provided with in the pipeline is opened, and trailing wheel gently falls; Cylinder is selected adjustable bounce cylinder for use, and gas delivery realizes by several reversal valves, and is furnished with the exhausting silencer throttle, does not have impact to guarantee the lifting of wheel Wheel-chair; The floor projection distance of the axial line of the diameter of trailing wheel and breast wheel and axis and hind axle can be in the width of a step earth point of trailing wheel and breast wheel together through suitably selecting; Two front-wheels are contained on separately the front fork, front fork can rotate around the vertical shaft of a lengthening, and vertical shaft passes through from a brake, and it can be fixed on the optional position, it can be shifted up and down during releasing of brake, like this, stretch under the vertical shaft during stair activity and make vehicle body keep level, to guarantee safety, and can reset behind the arrival level land, also have, the distance between the front and rear wheel axial line can be adjusted, with the step width of the stair that adapt to the user residence; Hand-cranking running gear is established in one or both sides at wheel Wheel-chair handrail, this device connects by clutch and trailing wheel or hind axle, and under clutch was in bonding state, occupant's steerable wheel Wheel-chair was movable on the level land, travel as promoting this moment, clutch can be placed released state; The wheel Wheel-chair is furnished with the compressor that uses single phase poaer supply, and its output gas pressure can reach 1.6MPa to 2.5MPa, and compressor is installed on the vehicle frame, connects with gas tank with articulation, can unload easily after the inflation.

The present invention comes down to the process in building about the wheel Wheel-chair is decomposed into the motion of vertical and horizontal both direction, lean on the strength elevate a turnable ladder in the time of upstairs, lean on gravity fall in the time of downstairs, moving of horizontal direction then realized by manpower, occupant and care-giver all wear seat belt and take turns Wheel-chair and be tied during use, to guarantee safety.

The present invention adopts strength to drive, and is simple in structure, and handiness is safeguarded easily, can adopt standardized component, is beneficial to manufacturing; Air energy-storage device reliable operation, the life-span is long, and the pressurising required time is short, and is convenient; It is low to do power cost with compressed air, pollution-free, safety.Its deadweight of wheel Wheel-chair and the overall dimensions that use present technique to make are less, not only are suitable for medical institutions' use, and make it enter family to become possibility.

Description of drawings

The present invention is further detailed explanation below in conjunction with drawings and embodiments.

But Fig. 1 is the wheelchair bassinet structure sketch map of air assisted stair activity of the present invention.

But Fig. 2 is the wheel Wheel-chair pneumatic system diagram of air assisted stair activity of the present invention.

Fig. 3, Fig. 4 are respectively that but the wheel Wheel-chair of air assisted stair activity of the present invention is gone upstairs, the process of going downstairs substep sketch map.

The specific embodiment

As shown in Figure 1, support plate 33 is arranged on the vehicle frame 16, fixing cylinder 15 on it, the external part of piston rod 10 is connected with axis 9, there is the T shape support 7 of a horizontal expansion at the middle part of axis 9, have guide post 31 and 6, two breast wheels 8 of two universal wheels to be loaded on the two ends of axis 9 on the T shape support 7, breast wheel 8 and universal wheel 6 keep certain distance with ground when travelling on the level land.Supply with compressed air by gas tank 17 during cylinder 15 work, the centre needs through air distributing device 18, and user is handled the function of valve to realize going downstairs in the air distributing device 18.Compressor 32 can reach the compressed air of 1.6MPa to 2.5MPa to gas tank 17 voltage supply power, and it uses single phase poaer supply, is snap-fit on the vehicle frame 16, is connected with gas tank 17 usefulness articulations.Front-wheel 1 connects with front fork 41 by front axle 2, and front fork 41 can rotate around vertical shaft 35, vertical shaft 35 from brake 36 by and explained watts 38 and checked, pulling pin handle 37 unclamps brake shoe 38, vertical shaft 35 can be free vertically movable.Brake 36 usefulness bolts 39 are fixed on the column 34 that vehicle frame 16 stretches out forward, and one group of through hole 40 is arranged on the column 34, change the distance that bolt 39 and combining of through hole 40 can be adjusted front axle 2 and hind axle 12.29, manage usefulness when keeping supplying the building before each side establish the front portion of vehicle frame 16, precedingly on 29, control handle 30 is housed, handle valve in the air distributing device 18 and the pin handle 37 in the brake 36 respectively.Manage usefulness when supplying downstairs after two to 20, two control handles 19 are identical with the effect of control handle 30.Power transmission shaft 22 passes through from vehicle frame 16 forward standpipes 21, one section of its nearly upper end has spline 23, the circle hole sleeve of crank 26 1 ends is on spline 23, crank 26 is a hollow, mandrel 25 is housed therebetween, the flat tongue 24 of mandrel 25 heads embeds in the teeth groove of spline 23, rotates crank 26 and can drive power transmission shaft 22 rotations.Can make mandrel 25 displacements by hyposphene head pin 27, flat tongue 24 withdraws from the teeth groove of spline 23, and the relative position that can adjust crank 26 and power transmission shaft 22 this moment unclamps wedge head pin 27, and spring 28 resets mandrel 25.Power transmission shaft 22 lower ends connect with decelerator 3 can drive drive sprocket 4 rotations, and drive sprocket 4 passes through chain 5, driven trailing wheels 11 and rotate together by movable sprocket 14, movable loose tongue 13.Movable loose tongue 13 is in unbound state usually with trailing wheel 11, makes crank 26 rotations when being pushed to prevent the wheelchair car.

As shown in Figure 2, compressor 32 connects with gas tank 17 by articulation 42, and compressed air is at stop valve 43 and enters air distributing device 18 under the opening and be divided into two-way, and one the tunnel transfers to pressure P through first pressure regulator 44 ₁, another road second pressure regulator 45 transfers to pressure P ₂, first reversal valve 46 is P with pressure ₁Gas circuit connect, it is a normally closed type, it is P with pressure that the first exhausting silencer choke valve, 50, the second reversal valves 47 are housed on it ₂Gas circuit connect, it is a normal opened type, and the second exhausting silencer choke valve 51 is housed on it, when the handle of the 3rd reversal valve 48 was in position I, pressure was P ₂The pulling force chamber of air admission cylinder 15, make breast wheel 8 built on stilts, if this moment control linkage 52, make second reversal valve 47 cut off gas circuits, first reversal valve 46 is connected gas circuits, cylinder 15 pulling force chambeies communicate with the air vent of second reversal valve 47, pressure is P ₁The thrust chamber of air admission cylinder 15, piston rod 10 promotes axis 9 and moves down the wheel Wheel-chair is risen.If first reversal valve 46 and second reversal valve 47 are in state shown in the figure, to position II, then cylinder 15 pulling force chambeies communicate with the air vent of first reversal valve 46 with the handle wrench of the 3rd reversal valve 48, and pressure is P ₂The thrust chamber of air admission cylinder 15, piston moves down breast wheel 8 is landed, because pressure P ₂Less than P ₁, so the wheel Wheel-chair can not be lifted, but when piston rod 10 be subjected to air that the external force effect makes cylinder 15 thrust intracavity by compression and pressure greater than P ₂During certain numerical value, overflow valve 49 is opened, and piston is brought to and moves.

But the wheel Wheel-chair of air assisted stair activity shown in Figure 3 is stepped on the building process: (a) lifting vehicle body, and front-wheel descends; (b) translation vehicle body, trailing wheel enters rank; (c) vehicle body falls, and axis is packed up; (d) translation vehicle body, axis enters rank; (e) lifting vehicle body, front-wheel falls again; (f) translation vehicle body, trailing wheel enters rank.

But the wheel Wheel-chair process of going downstairs of air assisted stair activity shown in Figure 4 is: (p) cylinder charge, and axis falls; (q) translation vehicle body, front-wheel descends; (r) translation vehicle body, front-wheel falls again; (s) translation vehicle body, axis falls; (t) translation vehicle body, the trailing wheel depression of order; (u) translation vehicle body, axis falls.

Claims

1. but the wheel Wheel-chair of an air assisted stair activity, it is made up of vehicle frame, wheel, gas tank, air distributing device and cylinder, it is characterized in that two breast wheels (8) are loaded on the two ends of axis (9), the external part fixed connection of the piston rod (10) of the middle part of axis (9) and cylinder (15) and cross out a T shape support (7) has guide post (31) and two universal wheels (6) on the T shape support (7).

2. but the wheel Wheel-chair of air assisted stair activity according to claim 1 is characterized in that air distributing device (18) has first pressure regulator (44) and second pressure regulator (45), and compressed air is P by first pressure regulator (44) back air pressure ₁, be P by second pressure regulator (45) back air pressure ₂, and P ₁Greater than P ₂

3. but the wheel Wheel-chair of air assisted stair activity according to claim 1, the vertical shaft (35) that it is characterized in that front-wheel (1) can also can be checked by the brake shoe on it (38) in brake (36) in displacement vertically, brake (36) is fixed on the forward column of vehicle frame (16) (34) with bolt (39), one group of through hole (40) is arranged on this column (34), and bolt (39) can be fixing with brake (36) by any through hole (40).

4. but the wheel Wheel-chair of air assisted stair activity according to claim 1, it is characterized in that having and can drive the driven by shaking mechanism that trailing wheel (11) rotates, this mechanism comprises crank (26), wedge head pin (27), mandrel (25), spring (28), power transmission shaft (22), decelerator (3), drive sprocket (4), chain (5), by movable sprocket (14) and movable loose tongue (13).