CN204978075U

CN204978075U - Stair climbing wheelchair

Info

Publication number: CN204978075U
Application number: CN201520346387.6U
Authority: CN
Inventors: 杨祖成
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-27
Filing date: 2015-05-27
Publication date: 2016-01-20
Anticipated expiration: 2025-05-27

Abstract

The utility model discloses a stair climbing wheelchair adopt climb stair lead slide and cover above that climb the stair piston shoes climb the stair device. On when going downstairs, climb the intersection line contact of stair piston shoes and the horizontal plane and the facade in ladder step, the stair of fixing on the automobile body of climbing are led the slide and are slided on climbing the stair piston shoes, whole automobile body will use the point of intersect in stair ladder step to rotate for supporting simultaneously, its motion is synthetic to be in the slant or oblique decurrent motion to the supporter of automobile body shifts between stair piston shoes and the wheel climbing, makes it constantly rise or descend to accomplishing and climb stair work, thereby has the stair of climbing function. The utility model has the characteristics of the excellent stair function of climbing, motion stationary, strike little, laborsaving, simple structure, convenient to use etc.

Description

Stair climbing wheelchair

Technical field

The utility model relates to the manpower facility with stair climbing function, especially relates to the wheelchair with stair climbing function.

Background technology

A large amount of handicapped person is had in the elderly of current China, disabled person and patient, these people constitute the wheelchair demand colony of substantial amounts, huge demand facilitates China's wheelchair industry and in recent years comparatively fast develops, and electric wheelchair and manpower wheelchair enter huge numbers of families in a large number, improve quality of the life.But no matter be that electric wheelchair or manpower wheelchair all run into a difficult problem of going upstairs, and most domestic people still lives in and does not have in the multi-storey building of elevator now, upper downstairs by stair, constrains the popularization of wheelchair to a certain extent.For this reason, wheelchair has stair climbing function becomes the problem of urgently capturing, and relevant manufacturers drops into a large amount of manpower and materials and researches and develops, and the electric wheelchair having many moneys to have stair climbing function at present emerges, but expensive; And the manpower wheelchair with stair climbing function is developed very undesirable, scheme is many, but more successfully only has the stair climbing wheelchair of star wheel structure, but this type of wheelchair exists very large defect, and bumpy motion, impact greatly, and are required great effort, so use few, cannot promote.

Summary of the invention

In order to solve the deficiency in above-mentioned technology, the purpose of this utility model is to provide stable movement, impacts the little and laborsaving stair climbing wheelchair with stair climbing function.

For convenience, in the following description to facade and the horizontal surface of stair ladder step in three dimensional space, can describe with the perpendicular line of the stair ladder step in two dimensional surface view and horizon, in other words these two kinds of statements are of equal value; The facade that in same three dimensional space, stair ladder walks and the external corner intersection of horizontal surface, and the statement of the perpendicular line that in two dimensional surface view, stair ladder walks and horizontal intersection point is of equal value, and claim this intersection point to be the intersection point that ladder walks; In three dimensional space, in each arc-shaped surface of stair climbing slide plate and stair climbing piston shoes and two dimensional surface view, two kinds of each circular arc of stair climbing slide plate and stair climbing piston shoes state equivalence.For stair climbing piston shoes and wheel, what its projection did not refer to projecting plane is all for projecting plane with place, the side plane of casing or car body (frame).

In order to solve the problems of the technologies described above, stair climbing wheelchair of the present utility model, comprises wheelchair frame, wheel, brake gear, and seat such as to lean at the part, wheel has two big wheels and two trundles, and wheelchair frame comprises two side framves be parallel to each other, and each side frame is respectively provided with a big wheel and a trundle, big wheel is parallel with side frame, and seat to be formed on wheelchair frame by stretching tight with flexible fabric, stair climbing wheelchair is provided with stair-climbing device, this device is primarily of stair climbing slide plate and stair climbing piston shoes composition, the projection of stair climbing slide plate is fan-shaped, stair climbing piston shoes be projected as partial circle shape, all circular arcs on stair climbing slide plate and stair climbing piston shoes are all concentric circles circular arcs, stair climbing piston shoes are parallel to each other by two and the rigid body that forms of the piston shoes side plate of symmetry and a piston shoes arc block, piston shoes side plate is partial circle shape, there are great circle arc and small arc-shaped, piston shoes arc block also has great circle arc and small arc-shaped, the large circular arc radius of the partial circle shape of piston shoes side plate is equal with the radius of the great circle arc of piston shoes arc block, arbitrary radial section of stair climbing piston shoes is " U " shape, and it is through along fan-shaped circumference, the both sides of " U " shape are piston shoes side plate, the base of " U " shape is piston shoes arc block, and the top of each piston shoes side plate, namely there is a circumferentially through arc chute side of small end, on described stair climbing piston shoes, the arc chute of each piston shoes side plate is in inner side, the radius of the small arc-shaped of piston shoes arc block is slightly larger than the radius of the fan-shaped circular arc of stair climbing slide plate, and the thickness of piston shoes arc block is slightly larger than the thickness of stair climbing slide plate, respectively there is the circular arc feather key of an evagination the fan-shaped small end both sides of stair climbing slide plate, the small arc-shaped radius of this circular arc feather key is slightly larger than the radius of the small arc-shaped of arc chute, and the large circular arc radius of circular arc feather key is less than the radius of the great circle arc of arc chute, the height of circular arc feather key and the deep equality of arc chute, stair climbing piston shoes are sleeved on stair climbing slide plate, the small arc-shaped of the piston shoes arc block on stair climbing piston shoes and the fan-shaped circular arc of stair climbing slide plate suitable, the arc chute of each piston shoes side plate on stair climbing piston shoes and the circular arc feather key of stair climbing slide plate respective side suitable, stair climbing piston shoes and stair climbing slide plate relatively can be made suitable, conter clockwise and slide.

Stair climbing slide plate is fixed on the inner side of side frame of wheelchair frame, or be fixed on the outside of side frame of wheelchair frame, namely between big wheel and side frame, stair climbing slide plate and on the plane of movement of stair climbing piston shoes and big wheel place plane be parallel to each other not at same plane, stair climbing piston shoes slide and do not interference with other components on stair climbing slide plate; Described stair climbing wheelchair forms stair-climbing device two groups of stair climbing slide plates and on stair climbing piston shoes symmetrical.

The setting height(from bottom) in the center of circle that stair climbing slide plate is fan-shaped is higher than the height intending the highest ladder step of climbing; When the angle of stair climbing wheelchair and horizontal surface is the angle of stair activity, the height of the great circle arc end points of the fan-shaped end points of stair climbing slide plate and stair climbing piston shoes is higher than the height intending the highest ladder step of climbing, the contact point that stair climbing piston shoes walk with ladder, be less than with the projection of stair climbing piston shoes and the intersection point distance in the horizontal direction of high-wheeled projection the least depth intended stair climbing ladder and walk, so just can climb the stair within the scope of this; Some is overlapping for the projection and high-wheeled projection of stair climbing piston shoes, a part for the great circle arc projection of stair climbing piston shoes is in the outside of high-wheeled projection, and stair climbing piston shoes climb the outside being projected in high-wheeled projection of the contact point that the highest ladder walks with plan, active section on the great circle arc of stair climbing piston shoes must in the outside of high-wheeled projection, and the contact point that in other words stair climbing piston shoes and ladder walk will in the outside of high-wheeled projection to the segmental arc between the projection and the intersection point of high-wheeled projection of stair climbing piston shoes; The nadir of the great circle arc of stair climbing piston shoes is higher than the nadir of big wheel wheel rim, and the nadir of the great circle arc of stair climbing piston shoes is positioned at high-wheeled projection, and near the projection of stair climbing piston shoes and the intersection point of high-wheeled projection, also near high-wheeled nadir; Make the distance of the intersection point of the projection of stair climbing piston shoes and high-wheeled projection and horizontal surface less like this, thus stair climbing wheelchair can easily be crossed by big wheel.The arc length of the fan-shaped circular arc of stair climbing slide plate is greater than the arc length of corresponding position circular arc on stair climbing piston shoes, the slide guide when arc length of the fan-shaped circular arc of stair climbing slide plate meets the slip work of stair climbing piston shoes and support.The stair-climbing device of device on stair climbing wheelchair of the present utility model, stair climbing piston shoes can be slided on the stair climbing slide plate being connected in wheelchair, except stair climbing piston shoes, whole stair climbing wheelchair can slide on stair climbing piston shoes equally, makes wheelchair utilize big wheel speeling stairway to be substantially converted into the slip on the inclined-plane along mistake stair intersection point like this.Wheel speeling stairway resisting moment is the product acting on the car body gravity at wheel shaft center and the vertical distance of fulcrum (stair intersection point), and kinetic moment is the product acting on the external force at wheel shaft center and the vertical distance of fulcrum (stair intersection point), the arm of force (vertical distance of fulcrum) that height along with stair ladder step increases its resisting moment increases, and power arm reduces, so ladder step will be climbed need larger power, as climbed highly for the stair ladder of 100mm walks, required external force is greater than the gravity of whole wheelchair, and the force-bearing situation of the stair-climbing device of star wheel structure is similar.And utilize stair-climbing device to be converted into the slip on inclined-plane, external force just mainly overcomes downslide component and the friction force of car body, and the gradient of stair is generally at about 30 degree, so external force needed for stair climbing wheelchair speeling stairway of the present utility model will much smaller than the gravity of whole stair climbing wheelchair, thus very laborsaving.Meanwhile, this slip makes stair climbing wheelchair speeling stairway more steady, impacts less.When stair activity, the supporter of stair climbing wheelchair car body shifts between stair climbing piston shoes and big wheel, when supporter transfers to big wheel, stair climbing piston shoes reset on the one hand, on the other hand, very little to the distance of horizontal surface by the strong point due to what transfer on big wheel, stair climbing wheelchair can be climbed very like a cork.

The one of stair climbing wheelchair of the present utility model is improved, and stair climbing piston shoes are parallel to each other by two and the piston shoes side plate of symmetry, the rigid body of at least two small sheaves and at least two large pulley compositions, the thickness of the piston shoes side plate small end of stair climbing piston shoes is less than the thickness of large end, its interface is arc surface, form step, and step plane is parallel with piston shoes side plate planar, the arc radius of the step on this piston shoes side plate is greater than the large circular arc radius of circular arc feather key, the height of step is equal with the height of circular arc feather key, step plane is at least fixed with two small sheaves, its rotational plane is parallel with step plane, the width of small sheave is equal with the height of step, small sheave is distributed in the plane of step, the center of circle of the internal common tangent circle of each small sheave is on the symmetric line of piston shoes plate portion annular arrangement, its internal common tangent circle center of circle is slightly in the top in the concentric circles center of circle of each circular arc, internal common tangent circle radius equals the radius of the small arc-shaped of circular arc feather key, thus make there is gap between the small arc-shaped of the internal common tangent circle of each small sheave and circular arc feather key, work when ensureing that small sheave is different from large pulley, two large pulleys are had at least to be evenly fixed between the large end of two piston shoes side plates, the width of large pulley is slightly larger than the thickness of stair climbing slide plate, its rotational plane is parallel with piston shoes side plate planar, the outer common tangent circle of each large pulley and the circle of other circular arcs are concentric circles, and its outer common tangent circle radius equals the radius of the fan-shaped circular arc of stair climbing slide plate, stair climbing piston shoes are sleeved on stair climbing slide plate, large pulley on stair climbing piston shoes contacts with the fan-shaped arc surface of stair climbing slide plate, and the small sheave of each piston shoes side plate on stair climbing piston shoes contacts with the small arc surface of the circular arc feather key of stair climbing slide plate respective side, stair climbing piston shoes and stair climbing slide plate relatively can be made suitable, conter clockwise and slide, and in other words, the slid clockwise that the relative stair climbing slide plate of stair climbing piston shoes is done, the conter clockwise being exactly the relative stair climbing piston shoes of stair climbing slide plate slides, and vice versa.Owing to have employed pulley, its friction drag is reduced, laborsaving further.

The another kind of stair climbing wheelchair of the present utility model improves, and stair-climbing device has a counter weight device, comprises ring-shaped weight, cylindricality counterweight, guide pipe and two flexible strand; Guide pipe is by large guide pipe, and reducer union is fixedly connected with little guide pipe order coaxial line; Reducer union is annulus post block, and external diameter is equal with large guide pipe external diameter, and internal diameter is equal with little guide pipe internal diameter; The external diameter of cylindricality counterweight is slightly less than the internal diameter of little guide pipe, and the external diameter of ring-shaped weight is slightly less than the internal diameter of large guide pipe and is greater than the internal diameter of reducer union, and its internal diameter is less than the external diameter of cylindricality counterweight; The weight sum of ring-shaped weight and cylindricality counterweight is greater than the weight of stair climbing piston shoes, and the weight of cylindricality counterweight is less than the weight of stair climbing piston shoes; Mode of operation for large guide pipe upper and little guide pipe under, ring-shaped weight is loaded in large guide pipe, cylindricality counterweight is contained in the below of ring-shaped weight, one end of every root flexible strand is connected with the upper face center of cylindricality counterweight, the other end is through the inner circle of ring-shaped weight, go out large guide pipe, then walk around the track adjusting wheel be fixed on the side frame of wheelchair frame, be connected with the end face of a piston shoes side plate of stair climbing piston shoes symmetrically respectively; Balance position, the lower surface of ring-shaped weight contacts with the upper surface of reducer union, and the upper surface of cylindricality counterweight contacts with the lower surface of ring-shaped weight, and one end that stair climbing piston shoes are connected with flexible strand raises up.Stair climbing piston shoes under external force slid clockwise will mention cylindricality counterweight and ring-shaped weight, after spreading external force, under cylindricality counterweight and the gravity of ring-shaped weight and the gravitational difference effect of stair climbing piston shoes, cylindricality counterweight and ring-shaped weight come downwards to ring-shaped weight and only contact with reducer union, and flexible strand traction stair climbing piston shoes conter clockwise slides and resets; Stair climbing piston shoes under external force conter clockwise slide, only have cylindricality counterweight descending, spread after external force under the gravitational difference effect of stair climbing piston shoes and cylindricality counterweight, stair climbing piston shoes slid clockwise, flexible strand traction cylindricality counterweight goes upward to and only contacts with cylindricality counterweight, and stair climbing piston shoes reset.This counter weight device is that stair climbing piston shoes provide another kind of reset mode, effectively can shorten the circumferential size of stair climbing piston shoes.

Another of the stair-climbing device of stair climbing wheelchair of the present utility model is improved, the both sides of stair climbing slide plate to be respectively connected a backplate near stair climbing piston shoes small end, the upper, middle and lower of its projection is three positions is circular arc, middle arc radius is less than the radius of piston shoes side plate small arc-shaped on stair climbing piston shoes, and following arc radius is greater than the radius of piston shoes side plate small arc-shaped on stair climbing piston shoes; Radial section is " Z " shape, its height is slightly larger than the thickness of piston shoes side plate on stair climbing piston shoes, one end of backplate is fixed on stair climbing slide plate, unsettled and the small end that the is cover part piston shoes side plate all the time when the slip work of stair climbing piston shoes of the other end, on backplate, the unsettled face of relative stair climbing piston shoes is plane and piston shoes side plate outside face on parallel stair climbing piston shoes.Ensure that stair climbing piston shoes are enclosed within slip work on stair climbing slide plate, avoid piston shoes side plate on stair climbing piston shoes to come off.

Stair climbing wheelchair of the present utility model adopts the stair-climbing device of stair climbing slide plate and cover stair climbing piston shoes thereon, and structure is very simple.During stair activity, the horizontal surface that stair climbing piston shoes walk with ladder contacts with the intersection line of facade, the stair climbing slide plate be fixed on stair climbing wheelchair will slide on stair climbing piston shoes, simultaneously whole stair climbing wheelchair by with the intersection point of stair ladder step for support rotating, the motion that its motion synthesis makes stair climbing wheelchair substantially do obliquely or obliquely, and the supporter of wheelchair car body shifts between stair climbing piston shoes and big wheel, make stair climbing wheelchair constantly increase or the stair climbing work that declined, make it have stair climbing function; Due to the stair climbing piston shoes of stair climbing wheelchair of the present utility model and big wheel project between overlap, ensure that supporter shifts steady, greatly reduce or avoid impact, stable movement in stair climbing process, laborsaving, solve the problems existed in manpower wheelchair stair-climbing ladder.

Thus stair climbing wheelchair of the present utility model has excellent stair climbing function, and stable movement, impacts little, and structure is simple, the laborsaving and feature such as easy to use.

Accompanying drawing explanation

Be described in further detail below in conjunction with accompanying drawing and embodiment of the present utility model:

Fig. 1 is the two and three dimensions schematic diagram of the stair-climbing device structure be made up of stair climbing slide plate and stair climbing piston shoes (two piston shoes side plates and a piston shoes arc block).

Fig. 2 is the exploded perspective view of stair climbing piston shoes three-dimensional structure and stair-climbing device three-dimensional structure.

Fig. 3 is that stair climbing piston shoes make schematic three dimensional views that is suitable, conter clockwise slip relative to stair climbing slide plate.

Fig. 4 is that stair climbing piston shoes are made up of two piston shoes side plates, multiple small sheave and multiple large pulley, its piston shoes side plate three-dimensional structure, piston shoes side plate and pulley and stair climbing slide plate three-dimensional mounting structure, and the exploded perspective view of the stair-climbing device three-dimensional structure formed.

Fig. 5 is the stair-climbing device three-dimensional structure schematic diagram that stair climbing piston shoes are made up of two piston shoes side plates, multiple small sheave and multiple large pulley.

Fig. 6 is that the stair climbing piston shoes be made up of two piston shoes side plates, multiple small sheave and multiple large pulley make schematic three dimensional views that is suitable, conter clockwise slip relative to stair climbing slide plate.

Fig. 7 is that stair-climbing device is provided with counter weight device, and stair climbing piston shoes and counterweight are in the schematic diagram of balance position.

Fig. 8 is that stair-climbing device is provided with counter weight device, when slid clockwise made by stair climbing piston shoes and the schematic diagram of counterweight relation.

Fig. 9 is that stair-climbing device is provided with counter weight device, and stair climbing piston shoes are done when conter clockwise slides and the schematic diagram of counterweight relation.

Figure 10 is the guard board structure schematic diagram of stair climbing piston shoes.

Figure 11 is that the two dimension master of stair climbing wheelchair structure of the present utility model is depending on looking schematic diagram with the right side.

Figure 12 is that stair climbing wheelchair of the present utility model is gone upstairs one of schematic diagram.

Figure 13 is that stair climbing wheelchair of the present utility model is gone upstairs schematic diagram two.

Figure 14 is that stair climbing wheelchair of the present utility model is gone upstairs schematic diagram three.

Figure 15 is that stair climbing wheelchair of the present utility model is gone upstairs schematic diagram four.

Figure 16 is that stair climbing wheelchair of the present utility model is gone downstairs one of schematic diagram.

Figure 17 is that stair climbing wheelchair of the present utility model is gone downstairs schematic diagram two.

Figure 18 is that stair climbing wheelchair of the present utility model is gone downstairs schematic diagram three.

Figure 19 is that stair climbing wheelchair of the present utility model is gone downstairs schematic diagram four.

Figure 20 is that stair climbing wheelchair of the present utility model is gone downstairs schematic diagram five.

Detailed description of the invention

Stair climbing wheelchair of the present utility model, comprises wheelchair frame, wheel, brake gear, and seat such as to lean at the part; Wheel has two big wheels 1 and two trundles, wheelchair frame comprises two side framves be parallel to each other, each side frame is respectively provided with a big wheel 1 and a trundle, big wheel 1 is parallel with side frame, and seat stretches tight by the fabric of general flexibility and to be formed on wheelchair frame.

From Fig. 1-Fig. 3, stair climbing wheelchair of the present utility model is provided with stair-climbing device, and this device forms primarily of stair climbing slide plate 31 and stair climbing piston shoes 32.The projection of stair climbing slide plate 31 is fan-shaped, stair climbing piston shoes 32 be projected as partial circle shape, as shown in Figure 1; All circular arcs on stair climbing slide plate 31 and stair climbing piston shoes 32 are all concentric circles circular arcs.Stair-climbing device of the present utility model selects light specific gravity, and intensity is high, the engineering plastics manufacture that wear-resistant self-lubricating performance is good.

Stair climbing piston shoes 32 are parallel to each other by two and the rigid body that forms of three parts such as the piston shoes side plate 33 of symmetry and a piston shoes arc block 34, piston shoes side plate 33 is partial circle shape, there are great circle arc and small arc-shaped, the top of piston shoes side plate 33, namely there is a circumferentially through arc chute 35 side of small end, and the circular arc feather key 36 that the hierarchy structure of groove and stair climbing slide plate 31 match is correlated with; Piston shoes arc block 34 also has great circle arc and small arc-shaped, the airline radius of the partial circle shape of piston shoes side plate 33 is equal with the radius of the great circle arc of piston shoes arc block 34, and the large 5mm of radius of the fan-shaped circular arc of the radius ratio stair climbing slide plate 31 of the small arc-shaped of piston shoes arc block 34, the large 3mm of thickness of the Thickness Ratio stair climbing slide plate 31 of piston shoes arc block 34; On stair climbing piston shoes 32, the arc chute 35 of two piston shoes side plates 33 is all towards inner side, piston shoes arc block 34 is placed between the large end of two piston shoes side plates 33, the airline face of two piston shoes side plates 33 and the great circle cambered surface of piston shoes arc block 34 coplanar, and it is fixedly connected to form stair climbing piston shoes 32 rigid body with bolt, as shown in Figure 2, arbitrary radial section of stair climbing piston shoes 32 is " U " shape, and it is through along fan-shaped circumference, obviously the both sides of " U " shape are piston shoes side plate 33, and the base of " U " shape is piston shoes arc block 34.

Respectively there is the circular arc feather key 36 of an evagination the fan-shaped small end both sides of stair climbing slide plate 31, the large 5mm of radius of the small arc-shaped of the small arc-shaped radius ratio arc chute 35 of this circular arc feather key 36, and the large circular arc radius of circular arc feather key 36 15mm less of the radius of the great circle arc of arc chute 35, the height of circular arc feather key 36 and the deep equality of arc chute 35.

Stair climbing piston shoes 32 are sleeved on stair climbing slide plate 31, the small arc-shaped of the piston shoes arc block 34 on stair climbing piston shoes 32 and the fan-shaped circular arc of stair climbing slide plate 31 suitable, for the driving surface of stair-climbing device during stair activity, the fan-shaped arc surface of stair climbing slide plate 31 the upper and small arc surface of piston shoes arc block 34 under, and two arc surfaces contact; The arc chute 35 of each piston shoes side plate 33 on stair climbing piston shoes 32 is suitable with the circular arc feather key 36 of stair climbing slide plate 31 respective side, when without External Force Acting, namely the small arc surface being in arc chute 35 under free state the upper and small arc surface of circular arc feather key 36 under, and to contact with each other; Stair climbing piston shoes 32 and stair climbing slide plate 31 relatively can be made suitable, conter clockwise and slide; As shown in Figure 2,3.The radius of each circular arc contacted in theory should be equal, but consider that friction reason should be variant, due to the radius slightly difference of arc surface matched, make the segmental arc that contacts shorter, thus friction is also less.

It is the structural representation of a kind of improvement of the stair-climbing device of stair climbing wheelchair of the present utility model by Fig. 4-Fig. 6, stair climbing piston shoes 32 are wherein parallel to each other by two and the piston shoes side plate 33 of symmetry, the rigid body that at least two small sheaves 38 and at least two large pulleys 39 form, the utility model adopts three small sheaves 38 and four large pulleys 39.The thickness of piston shoes side plate 33 small end of stair climbing piston shoes 32 is less than the thickness of large end, its interface is arc surface, form step 37, the thickness difference at two ends and the height of step 37 equal with the height of circular arc feather key 36, and step 37 plane and piston shoes side plate 33 plane parallel, the arc radius 15mm larger than the large circular arc radius of circular arc feather key 36 of the step 37 on this piston shoes side plate 33, step 37 plane is fixed three small sheaves 38, the rotational plane of pulley and step 37 plane parallel, the width of small sheave 38 is equal with the height of step 37, small sheave 38 is distributed in the plane of step 37, the center of circle of the internal common tangent circle of each small sheave 38 is on the symmetric line of piston shoes side plate 33 partial circle shape, its internal common tangent circle center of circle is 5mm on the concentric circles center of circle of each circular arc, internal common tangent circle radius equals the radius of the small arc-shaped of circular arc feather key 36, thus makes there is 5mm gap between the small arc-shaped of the internal common tangent circle of small sheave 38 and circular arc feather key 36.Four large pulleys 39 are evenly fixed between the large end of two piston shoes side plates 33, the width 3mm larger than the thickness of stair climbing slide plate 31 of large pulley 39, its rotational plane and piston shoes side plate 33 plane parallel, each outer common tangent circle of large pulley 39 and the circle of other circular arcs are concentric circles, and this outer common tangent circle radius is equal with the radius of the fan-shaped circular arc of stair climbing slide plate 31.Four large pulleys 39 are placed in two piston shoes side plates 33 that three small sheaves 38 are respectively housed greatly between end, step 37 is positioned at inner side, and is fixedly connected to form stair climbing piston shoes 32 rigid body with bolt, certainly in order to ensure that the rigidity of stair climbing piston shoes 32 can increase tie bolt; Stair climbing piston shoes 32 are sleeved on stair climbing slide plate 31, four large pulleys 39 on stair climbing piston shoes 32 are suitable with the fan-shaped circular arc of stair climbing slide plate 31, during stair activity work, the fan-shaped arc surface of stair climbing slide plate 31 upper and large pulley 39 under, four large pulleys 39 on stair climbing piston shoes 32 contact with the fan-shaped arc surface of stair climbing slide plate 31; Three small sheaves 38 of each piston shoes side plate 33 on stair climbing piston shoes 32 are suitable with the small arc-shaped of the circular arc feather key 36 of stair climbing slide plate 31 respective side, when without External Force Acting, namely to be under free state small sheave 38 the upper and small arc surface of circular arc feather key 36 under, three small sheaves 38 on piston shoes side plate 33 contact with the small arc surface of the circular arc feather key 36 of stair climbing slide plate 31 respective side, as shown in Figure 4, Figure 5.Stair climbing piston shoes 32 and stair climbing slide plate 31 relatively can be made suitable, conter clockwise and slide, as shown in Figure 6.Consider the contaminated problem of large pulley 39 possibility of this structure in actual use, an available arc plate is closed between the great circle arc of two piston shoes side plates 33.Owing to adopting pulley, friction is reduced further.

The another kind of the stair-climbing device of stair climbing wheelchair of the present utility model shown in Figure 10 improves, respectively to be connected a backplate 42 near stair climbing piston shoes 32 small end in the both sides of stair climbing slide plate 31, the upper, middle and lower of its projection is three circular arcs, arc radius in the middle of it is less than the radius of piston shoes side plate 33 small arc-shaped on stair climbing piston shoes 32, and following arc radius is greater than the radius of piston shoes side plate 33 small arc-shaped on stair climbing piston shoes 32.Radial section is " Z " shape, the large 2mm of thickness of piston shoes side plate 33 on its aspect ratio stair climbing piston shoes 32, one end of backplate 42 is fixed on stair climbing slide plate 31, the other end unsettled and when stair climbing piston shoes 32 slide work the small end of piston shoes side plate 33 on cover part stair climbing piston shoes 32 all the time, the unsettled relative unsettled face of stair climbing piston shoes 32 of backplate 42 is plane and the outside face of piston shoes side plate 33 on parallel stair climbing piston shoes 32.Stair climbing piston shoes 32 are made to work more reliable at stair climbing slide plate 31.

The stair climbing wheelchair structure of the present utility model of Figure 11 display, in the diagram for giving prominence to the installation site of stair-climbing device and wheelchair, avoid the interference of the relative elements of big wheel 1, several steel wires are only drawn, and with long and two-short dash line signal big wheel 1 profile, several figure below also use this kind express.This structure is that stair-climbing device installed by common wheelchair, this stair-climbing device comprises stair climbing slide plate 31 and cover stair climbing piston shoes 32 thereon, generally in fan-shaped, working part has stair climbing piston shoes 32 and stair climbing slide plate 31, and the great circle arc of stair climbing piston shoes 32 is exactly the maximum circular arc of stair-climbing device.The radius of the installation site of stair-climbing device on stair climbing wheelchair and stair climbing piston shoes 32 great circle arc is subject to intending the height of stair climbing ladder step and the impact (in this figure, stair are illustrated with long and two-short dash line) of the degree of depth, too little its great circle arc termination height that makes of the radius of stair climbing piston shoes 32 great circle arc highly then can not realize stair climbing function lower than ladder step, make again too greatly the contact point that stair climbing piston shoes 32 walk with ladder, the terraced degree of depth walked is greater than with the intersection point distance in the horizontal direction of the projection of stair climbing piston shoes 32 and the projection of big wheel 1, thus stair climbing piston shoes 32 can not be returned to original state when occurring upstairs, thus stair climbing again cannot be continued, so the large circular arc radius of its installation site and stair climbing piston shoes 32 should make the height of its curved line end points be greater than ladder step height, make the contact point that stair climbing piston shoes 32 walk with ladder again, the terraced degree of depth walked is less than with the intersection point projector distance in the horizontal direction of the projection of stair climbing piston shoes 32 and the projection of big wheel 1, stair climbing piston shoes 32 will be taken into account with the terraced contact point walked both in the outside that big wheel 1 projects in installation site simultaneously, again as far as possible near the projection of big wheel 1, and the intersection point of the projection of the projection of stair climbing piston shoes 32 and big wheel 1 is as far as possible near the nadir of big wheel 1, and the nadir of stair climbing piston shoes 32 should in the projection of big wheel 1, the intersection point of the close projection of stair climbing piston shoes 32 and the projection of big wheel 1 as far as possible again.

Because the fan-shaped center of circle of stair-climbing device also not all overlaps with the center of circle of big wheel 1, and stair climbing wheelchair upper downstairs time whole car body need around big wheel 1 central rotation angle, thus the great circle arc of stair climbing piston shoes 32 and the contact point that walks of ladder, with the intersection point distance in the horizontal direction of the projection of the great circle arc of stair climbing piston shoes 32 and the projection of cart roller 1, with stair climbing wheelchair upper downstairs time relevant with the angle of horizontal surface, larger then its projector distance of angle is less, but this change is little, this angle general is at about 70 degree, in order to reduce the impact of this change, the influence factor of this angle is considered when installing stair-climbing device, by stair climbing wheelchair upper downstairs time and horizontal surface angle state based on determine the installation site of stair-climbing device, Figure 11 is the state of the stair climbing wheelchair walking in a horizontal state installing stair-climbing device, and with the profile of long and two-short dash line signal stair, only for illustration of the structure of stair climbing wheelchair.

Stair-climbing device installation site is determined by the installation site of stair climbing slide plate 31, the installation site of stair climbing slide plate 31 both can be arranged on the inner side of side frame of wheelchair frame, also can be arranged on the outside of side frame of wheelchair frame, namely, between big wheel 1 and side frame, stair climbing slide plate 31 is preferably arranged on the inner side of side frame of wheelchair frame by stair climbing wheelchair of the present utility model.Stair climbing slide plate 31 and on the plane of movement of stair climbing piston shoes 32 and big wheel 1 place plane be parallel to each other not in same plane, stair climbing piston shoes 32 slide and do not interference with other components on stair climbing slide plate 31.Stair climbing wheelchair forms stair-climbing device two groups of stair climbing slide plates 31 and on stair climbing piston shoes 32 symmetrical.

Stair-climbing device installation site should meet: the setting height(from bottom) in the center of circle that stair climbing slide plate 31 is fan-shaped is higher than the height intending the highest ladder step of climbing, when the angle of stair climbing wheelchair and horizontal surface is the angle of stair activity, the height of the great circle arc end points of the fan-shaped end points of stair climbing slide plate 31 and stair climbing piston shoes 32 is higher than the height intending the highest ladder step of climbing, the height that stair climbing wheelchair of the present utility model preferably intends climbing the highest ladder step is 200mm, the contact point that stair climbing piston shoes 32 walk with ladder, the least depth intended stair climbing ladder and walk is less than with the intersection point projector distance in the horizontal direction of the projection of stair climbing piston shoes 32 and the projection of big wheel 1, stair climbing wheelchair of the present utility model preferably this horizontal throw is that 200mm(is according to building code, the height of general stair is not more than 175mm, the degree of depth is not less than 260mm), thus these group data are selected can to guarantee to climb most stair.And the distance of the intersection point of the projection of the projection of stair climbing piston shoes 32 and big wheel 1 and horizontal surface is little as far as possible, preferably this is highly about 40mm to the utility model, and the ladder that about 40mm crossed by general wheelchair is very easily.Some is overlapping for the projection of stair climbing piston shoes 32 and the projection of big wheel 1, a part for the great circle arc projection of stair climbing piston shoes 32 is in the outside of the projection of big wheel 1, certain stair climbing piston shoes 32 climb the outside being projected in the projection of big wheel 1 of the contact point that the highest ladder walks with plan, active section on the great circle arc of obvious stair climbing piston shoes 32 must in the outside of the projection of big wheel 1, so-called active section is exactly the contact point that stair climbing piston shoes 32 walk with ladder, and the segmental arc between the intersection point of the projection of the projection of stair climbing piston shoes 32 and big wheel 1; Simultaneously the nadir of the great circle arc of stair climbing piston shoes 32 is higher than the nadir of big wheel 1 wheel rim, the nadir of the great circle arc of stair climbing piston shoes 32 is positioned at the projection of big wheel 1, and the intersection point of the close projection of stair climbing piston shoes 32 and the projection of big wheel 1, also near the nadir of big wheel 1; The arc length of the fan-shaped circular arc of stair climbing slide plate 31 is greater than the arc length of corresponding position circular arc on stair climbing piston shoes 32, the arc length of the fan-shaped circular arc of stair climbing slide plate 31 meet stair climbing piston shoes 32 slide work time slide guide and support.And when the angle of stair climbing wheelchair and horizontal surface is the angle of stair activity, the two ends of the fan-shaped circular arc of stair climbing slide plate 31 are basic with high, and when stair climbing wheelchair walking in a horizontal state, the fan-shaped circular arc roller chair back end of stair climbing slide plate 31 raises up.

Figure 12-Figure 15 is the signal of process upstairs of stair climbing wheelchair of the present utility model, and the handle 2 of stair climbing wheelchair is at front and big wheel 1 rear, and stair climbing wheelchair upside down away.The angle of stair climbing wheelchair and horizontal surface is the angle of stair activity, when the stair climbing piston shoes 32 of the stair-climbing device of stair climbing wheelchair of the present utility model just walk contact with stair ladder, the great circle arc center of circle of stair climbing piston shoes 32 and great circle arc end points are on this ladder step height, a bit contacting of the circular arc that the intersection point that this ladder walks is following with great circle arc end points, now the supporter of stair climbing wheelchair car body is big wheel 1, and the horizontal surface being supported for previous stair ladder step of whole stair climbing wheelchair, as shown in figure 12, after this under the effect dragging tractive force, the supporter of stair climbing wheelchair car body becomes stair climbing piston shoes 32, as shown in figure 13, and whole stair climbing wheelchair be supported for by the intersection point of this stair ladder step climbed, this point is exactly the strong point of whole stair climbing wheelchair, corresponding point on the great circle arc of the stair climbing piston shoes 32 be in contact with it are by the strong point, under the effect of external force, stair climbing slide plate 31 will do conter clockwise slip along stair climbing piston shoes 32, stair climbing wheelchair car body is driven to rotate counterclockwise around the center of circle of stair climbing piston shoes 32, simultaneously because the height of operator is constant, thus in process upstairs, the height of handle 2 is substantially constant, so whole stair climbing wheelchair will rotate clockwise around the intersection point of stair ladder step, the result of its motion synthesis is that stair climbing wheelchair car body does oblique upward movement, stair climbing wheelchair is made to increase, be equivalent to slide on inclined-plane, in the process, constant by the relative position of the strong point on stair climbing piston shoes 32.When the big wheel 1 of climbing on stair climbing wheelchair car body go upward to great circle arc on stair climbing piston shoes 32 by the strong point, during the critical spot namely overlapped with the projection of great circle arc on stair climbing piston shoes 32 and the projection intersection point of big wheel 1, as shown in figure 14, the supporter continuing stair climbing wheelchair car body more a little just becomes big wheel 1 from stair climbing piston shoes 32, now, stair climbing piston shoes 32 are by the effect of gravity, and stair climbing piston shoes 32 conter clockwise slides under gravity, the state until affranchise, realizes automatically reseting of stair climbing piston shoes 32, meanwhile also be transferred on big wheel 1 by corresponding point stair climbing piston shoes 32 walking the strong point with ladder by the strong point and walk the corresponding point of the strong point with ladder, under the effect of external force, big wheel 1 will rotate clockwise around the strong point, the wheel shaft of big wheel 1 is up thereupon rotating, thus stair climbing wheelchair car body is also up, until the horizon that big wheel 1 just walks with this ladder is tangent, or the intersection point that stair climbing piston shoes 32 walk with one, top stair ladder again contacts, stair climbing wheelchair climbs up this stair ladder step, so far climbing of a ladder step is completed, as shown in figure 15, so repeatedly complete whole stair climbing work.Stair climbing wheelchair handle 2 can be lengthened in practice, more convenient operation.

Figure 16-Figure 20 is the signal of process downstairs of stair climbing wheelchair of the present utility model, and in the process, the big wheel 1 of stair climbing wheelchair is at front and handle 2 rear, and stair climbing wheelchair forward moves ahead.The initial state that stair climbing wheelchair is gone downstairs is promoted shown in Figure 16, the facade that the vertical plane surface crossing wheel shaft of big wheel 1 just walks with stair ladder overlaps, the strong point of stair climbing wheelchair is the intersection point of this ladder step, and point corresponding with it on big wheel 1 is by the strong point, under the effect of thrust and gravity, big wheel 1 rotates counterclockwise around the strong point, and the wheel shaft of big wheel 1 rotates and declines, and makes stair climbing wheelchair car body descending, in the process, constant by the relative position of the strong point on big wheel 1, big wheel 1 shown in Figure 17 around the strong point rotate make stair climbing wheelchair car body come downwards on big wheel 1 by the strong point, with great circle arc in the projection of big wheel 1 and stair climbing piston shoes 32 project the position of intersection point overlap time, be in the critical of the supporter transfer of stair climbing wheelchair car body, give External Force Acting again, the supporter of stair climbing wheelchair car body just becomes stair climbing piston shoes 32 from big wheel 1, also be transferred on stair climbing piston shoes 32 by corresponding point big wheel 1 walking the strong point with ladder by the strong point simultaneously and walk the corresponding point of the strong point with ladder, under the effect of external force, slid clockwise made by the relative stair climbing piston shoes 32 of stair climbing slide plate 31, stair climbing wheelchair car body is rotated clockwise around the center of circle of stair climbing piston shoes 32, simultaneously because hand is almost constant in the process the height of 2, whole stair climbing wheelchair will rotate counterclockwise around the intersection point (strong point) of stair ladder step, the synthesis of its motion makes stair climbing wheelchair car body make oblique downward movement, as shown in figure 18.In the process, constant by the relative position of the strong point on stair climbing piston shoes 32, until big wheel 1 drops to the plane contact walked with next one ladder, supporter shifts as big wheel 1 again, as shown in figure 19.Motion stair climbing piston shoes 32 rotate clockwise under gravity a little again, automatically reset, as shown in figure 20.So far this stair ladder step complete under stair climbing wheelchair, completes the decline of a ladder step.So repeatedly complete whole process downstairs.

Another of Fig. 7-Figure 9 shows that stair-climbing device of stair climbing wheelchair of the present utility model is improved, and this stair-climbing device is provided with a counter weight device, comprises ring-shaped weight 40, cylindricality counterweight 41, guide pipe 42 and two flexible strand.Guide pipe 42 is by large guide pipe, and reducer union is fixedly connected with little guide pipe order coaxial line, and reducer union is annulus post block, and external diameter is equal with large guide pipe external diameter, and internal diameter is equal with little guide pipe internal diameter.The external diameter 5mm less of the internal diameter of little guide pipe of cylindricality counterweight 41, the external diameter 5mm less of the internal diameter of large guide pipe of ring-shaped weight 40, its internal diameter 15mm less of the external diameter of cylindricality counterweight 41.Ring-shaped weight 40 is greater than the weight of stair climbing piston shoes 32 with the weight sum of cylindricality counterweight 41, and the weight of cylindricality counterweight 41 is less than the weight of stair climbing piston shoes 32, and the material of ring-shaped weight 40 and cylindricality counterweight 41 is the metal that proportion is larger; Mode of operation be large guide pipe upper little guide pipe under, ring-shaped weight 40 is loaded in large guide pipe, cylindricality counterweight 41 is contained in the below of ring-shaped weight 40, one end of every root flexible strand is connected with the upper face center of cylindricality counterweight 41, the other end is through the inner circle of ring-shaped weight 40, go out large guide pipe, then walk around the track adjusting wheel be fixed on the side frame of wheelchair frame, be connected with the end face of a piston shoes side plate 33 of stair climbing piston shoes 32 symmetrically respectively; During balance position, the lower surface of ring-shaped weight 40 contacts with the upper surface of reducer union, and the upper surface of cylindricality counterweight 41 contacts with the lower surface of ring-shaped weight 40, and one end that stair climbing piston shoes 32 are connected with flexible strand raises up, as shown in Figure 7.When stair climbing wheelchair upstairs time, slid clockwise made by stair climbing piston shoes 32 relatively stair climbing slide plate 31, traction flexible strand moves down, and by flexible strand promote ring-shaped weight 40 and cylindricality counterweight 41 up, once the supporter transfer of going upstairs, stair climbing piston shoes 32 are without External Force Acting, at this moment because the weight of ring-shaped weight 40 and cylindricality counterweight 41 is greater than the weight of stair climbing piston shoes 32, thus ring-shaped weight 40 and cylindricality counterweight 41 decline and draw the slip of stair climbing piston shoes 32 conter clockwise, until ring-shaped weight 40 contact with reducer union can not be descending, and cylindricality counterweight 41 draws motionless stair climbing piston shoes 32, it is pulled to contact with ring-shaped weight 40 by stair climbing piston shoes 32 on the contrary, stair climbing piston shoes 32 also draw motionless ring-shaped weight 40 and cylindricality counterweight 41, this is balance position, stair climbing piston shoes 32 are resetted, as shown in Figure 8.When stair climbing wheelchair is gone downstairs, conter clockwise slip done by stair climbing piston shoes 32 relatively stair climbing slide plate 31, traction flexible strand is moved, make cylindricality counterweight 41 descending, once the supporter transfer of going downstairs, stair climbing piston shoes 32 are without External Force Acting, at this moment because the weight of cylindricality counterweight 41 is less than the weight of stair climbing piston shoes 32, thus stair climbing piston shoes 32 slid clockwise traction cylindricality counterweight 41 is up, until cylindricality counterweight 41 contacts with ring-shaped weight 40, then can not pull, be balance position, stair climbing piston shoes 32 are resetted, as shown in Figure 9.

Abundant description is done to the utility model herein; do not deviating from utility model spirit and scope situation in this paper; can do some amendments to the utility model and improve, this has the people of ordinary skill one be apparent, but all falls into the utility model protection domain.

Claims

1. a stair climbing wheelchair, comprises wheelchair frame, wheel, brake gear, and seat such as to lean at the part, wheel has two big wheels (1) and two trundles, wheelchair frame comprises two side framves be parallel to each other, each side frame is respectively provided with a big wheel (1) and a trundle, big wheel (1) is parallel with side frame, and seat to be formed on wheelchair frame by stretching tight with flexible fabric, it is characterized in that: described stair climbing wheelchair is provided with stair-climbing device, this device is primarily of stair climbing slide plate (31) and stair climbing piston shoes (32) composition, the projection of described stair climbing slide plate (31) is fan-shaped, stair climbing piston shoes (32) be projected as partial circle shape, all circular arcs on stair climbing slide plate (31) and stair climbing piston shoes (32) are all concentric circles circular arcs, described stair climbing piston shoes (32) are parallel to each other by two and the rigid body that forms of the piston shoes side plate (33) of symmetry and a piston shoes arc block (34), piston shoes side plate (33) is partial circle shape, there are great circle arc and small arc-shaped, piston shoes arc block (34) also has great circle arc and small arc-shaped, the large circular arc radius of the partial circle shape of piston shoes side plate (33) is equal with the radius of the great circle arc of piston shoes arc block (34), arbitrary radial section of described stair climbing piston shoes (32) is " U " shape, and it is through along fan-shaped circumference, the both sides of " U " shape are piston shoes side plate (33), the base of " U " shape is piston shoes arc block (34), and the top of each piston shoes side plate (33), namely there is a circumferentially through arc chute (35) side of small end, the arc chute (35) of the upper each piston shoes side plate (33) of described stair climbing piston shoes (32) is in inner side, the radius of the small arc-shaped of described piston shoes arc block (34) is slightly larger than the radius of the fan-shaped circular arc of stair climbing slide plate (31), and the thickness of piston shoes arc block (34) is slightly larger than the thickness of stair climbing slide plate (31), respectively there is the circular arc feather key (36) of an evagination the fan-shaped small end both sides of stair climbing slide plate (31), the small arc-shaped radius of this circular arc feather key (36) is slightly larger than the radius of the small arc-shaped of arc chute (35), and the large circular arc radius of circular arc feather key (36) is less than the radius of the great circle arc of arc chute (35), the height of circular arc feather key (36) and the deep equality of arc chute (35), described stair climbing piston shoes (32) are sleeved on stair climbing slide plate (31), the small arc-shaped of the piston shoes arc block (34) on stair climbing piston shoes (32) and the fan-shaped circular arc of stair climbing slide plate (31) suitable, the arc chute (35) of each piston shoes side plate (33) on stair climbing piston shoes (32) and the circular arc feather key (36) of stair climbing slide plate (31) respective side are suitable, and described stair climbing piston shoes (32) and stair climbing slide plate (31) relatively can be made suitable, conter clockwise and slide,

Described stair climbing slide plate (31) is fixed on the inner side of side frame of wheelchair frame, or is fixed on the outside of side frame of wheelchair frame, namely between big wheel (1) and side frame; Stair climbing slide plate (31) and on the plane of movement of stair climbing piston shoes (32) and big wheel (1) place plane be parallel to each other not in same plane, stair climbing piston shoes (32) do not interference with other components upper slip of stair climbing slide plate (31); Described stair climbing wheelchair forms stair-climbing device two groups of stair climbing slide plates (31) and on stair climbing piston shoes (32) symmetrical;

The setting height(from bottom) in the center of circle that described stair climbing slide plate (31) is fan-shaped is higher than the height intending the highest ladder step of climbing, when the angle of described stair climbing wheelchair and horizontal surface is the angle of stair activity, the height of the great circle arc end points of the fan-shaped end points of described stair climbing slide plate (31) and stair climbing piston shoes (32) is higher than the height intending the highest ladder step of climbing, the contact point that stair climbing piston shoes (32) walk with ladder, and the intersection point distance in the horizontal direction of the projection of the projection of stair climbing piston shoes (32) and big wheel (1) is less than the least depth intended stair climbing ladder and walk, some is overlapping for the projection of described stair climbing piston shoes (32) and the projection of big wheel (1), a part for the great circle arc projection of stair climbing piston shoes (32) is in the outside of the projection of big wheel (1), stair climbing piston shoes (32) are upper and intend the outside being projected in the projection of big wheel (1) of climbing the contact point that the highest ladder walks, and the active section on the great circle arc of stair climbing piston shoes (32) is in the outside of the projection of big wheel (1), the nadir of the great circle arc of stair climbing piston shoes (32) is higher than the nadir of big wheel (1) wheel rim, the nadir of the great circle arc of described stair climbing piston shoes (32) is positioned at the projection of big wheel (1), and the intersection point of the close projection of stair climbing piston shoes (32) and the projection of big wheel (1), also near the nadir of big wheel (1), the arc length of the fan-shaped circular arc of described stair climbing slide plate (31) is greater than the arc length of stair climbing piston shoes (32) upper corresponding position circular arc, the slide guide when arc length of the fan-shaped circular arc of stair climbing slide plate (31) meets stair climbing piston shoes (32) slip work and support.

2. stair climbing wheelchair according to claim 1, it is characterized in that: the stair climbing piston shoes (32) of described stair-climbing device are parallel to each other by two and the piston shoes side plate (33) of symmetry, the rigid body that at least two small sheaves (38) and at least two large pulleys (39) form, the thickness of piston shoes side plate (33) small end of described stair climbing piston shoes (32) is less than the thickness of large end, its interface is arc surface, form step (37), and step (37) plane and piston shoes side plate (33) plane parallel, the arc radius of the step (37) on this piston shoes side plate (33) is greater than the large circular arc radius of circular arc feather key (36), the height of step (37) is equal with the height of circular arc feather key (36), described step (37) plane is at least fixed with two small sheaves (38), its rotational plane and step (37) plane parallel, the width of small sheave (38) is equal with the height of step (37), small sheave (38) is distributed in the plane of step (37), the center of circle of the internal common tangent circle of each small sheave (38) is on the symmetric line of piston shoes side plate (33) partial circle shape, its internal common tangent circle center of circle is slightly in the top in the concentric circles center of circle of each circular arc, internal common tangent circle radius equals the radius of the small arc-shaped of circular arc feather key (36), two described large pulleys (39) are had at least to be evenly fixed between the large end of two piston shoes side plates (33), the width of large pulley (39) is slightly larger than the thickness of stair climbing slide plate (31), its rotational plane and piston shoes side plate (33) plane parallel, the outer common tangent circle of each large pulley (39) and the circle of other circular arcs are concentric circles, and this outer common tangent circle radius equals the radius of stair climbing slide plate (31) fan-shaped circular arc, the stair climbing piston shoes (32) of described stair-climbing device are sleeved on stair climbing slide plate (31), large pulley (39) on stair climbing piston shoes (32) contacts with the fan-shaped circular arc of stair climbing slide plate (31), small sheave (38) on each piston shoes side plate (33) on stair climbing piston shoes (32) contacts with the small arc-shaped of the circular arc feather key (36) of stair climbing slide plate (31) respective side, and described stair climbing piston shoes (32) and stair climbing slide plate (31) relatively can be made suitable, conter clockwise and slide.

3. stair climbing wheelchair according to claim 1, is characterized in that: described stair-climbing device has a counter weight device, comprises ring-shaped weight (40), cylindricality counterweight (41), guide pipe (42) and two flexible strand; Described guide pipe (42) is by large guide pipe, and reducer union is fixedly connected with little guide pipe order coaxial line; Reducer union is annulus post block, and external diameter is equal with large guide pipe external diameter, and internal diameter is equal with little guide pipe internal diameter; The external diameter of cylindricality counterweight (41) is slightly less than the internal diameter of little guide pipe, and the external diameter of ring-shaped weight (40) is slightly less than the internal diameter of large guide pipe and is greater than the internal diameter of reducer union, and its internal diameter is less than the external diameter of cylindricality counterweight (41); Ring-shaped weight (40) is greater than the weight of stair climbing piston shoes (32) with the weight sum of cylindricality counterweight (41), and the weight of cylindricality counterweight (41) is less than the weight of stair climbing piston shoes (32); Mode of operation for large guide pipe upper and little guide pipe under, ring-shaped weight (40) is loaded in large guide pipe, cylindricality counterweight (41) is contained in the below of ring-shaped weight (40), one end of every root flexible strand is connected with the upper face center of cylindricality counterweight (41), the other end is through the inner circle of ring-shaped weight (40), go out large guide pipe, then walk around the track adjusting wheel be fixed on the side frame of wheelchair frame, be connected with the end face of a piston shoes side plate (33) of stair climbing piston shoes (32) symmetrically respectively; Balance position, the lower surface of ring-shaped weight (40) contacts with the upper surface of reducer union, and the upper surface of cylindricality counterweight (41) contacts with the lower surface of ring-shaped weight (40), and one end that stair climbing piston shoes (32) are connected with flexible strand raises up.

4. stair climbing wheelchair according to claim 1, it is characterized in that: the both sides of described stair climbing slide plate (31) to be respectively connected a backplate (42) near stair climbing piston shoes (32) small end, the upper, middle and lower of its projection is three positions is circular arc, middle arc radius is less than the radius of upper piston shoes side plate (33) small arc-shaped of stair climbing piston shoes (32), and following arc radius is greater than the radius of upper piston shoes side plate (33) small arc-shaped of stair climbing piston shoes (32); Radial section is " Z " shape, its height is slightly larger than the thickness of the upper piston shoes side plate (33) of stair climbing piston shoes (32), one end of backplate (42) is fixed on stair climbing slide plate (31), unsettled and the small end that the is cover part piston shoes side plate (33) all the time when stair climbing piston shoes (32) slip work of the other end, the unsettled face of the upper relative stair climbing piston shoes (32) of backplate (42) is plane and the outside face of the upper piston shoes side plate (33) of parallel stair climbing piston shoes (32).