CN203493840U

CN203493840U - Wheelchair capable of walking up and down stairs

Info

Publication number: CN203493840U
Application number: CN201320481177.9U
Authority: CN
Inventors: 王啸风
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-05
Filing date: 2013-08-05
Publication date: 2014-03-26
Anticipated expiration: 2023-08-05

Abstract

The utility model provides a wheelchair capable of walking up and down stairs. The end socket of a telescopic top shaft of the wheelchair is divided into a flat surface and an arc-shaped surface and can automatically extend out of a sleeve by virtue of pressing the limit of a passing slot through a handle in the sleeve under the tension force of a spring at the rear end of the top shaft; when the telescopic top shaft is assembled on a pike pole which takes an axle shaft as a supporting point, the flat surface can transfer a kinetic force used for pulling the pike pole to a spoke so as to drive wheels to rotate forward, and the arc-shaped surface can collide with the spoke under the effect of an opposite acting force, so that the top shaft overcomes the tension force of the spring so as to rebound into the sleeve, and thus the pike rod returns; when the telescopic top shaft is reversely assembled on a wheel stand, the arc-shaped surface collides with the spoke so as to rebound to be matched with forward rotating of the wheels, and the flat surface can automatically clamp the spoke when the wheels slide backward; when the telescopic top shaft is assembled on a diversion trench base, the end socket can be inserted into a flat plate of the wheel stand so as to enable the wheels to be orientated; when not in use, the telescopic top shaft retracts into the sleeve in a fixed manner; the front ends of lugs of lug bevel angle rubber tires of the wheelchair are provided with upward bevel angles which are clamped into stairs in the process of walking up stairs; due to the structural design of the wheel stand, the wheelchair can not incline backward and turnover laterally on the stairs; two sides of the wheelchair can be folded inward.

Description

A kind of wheelchair that can stair activity

Technical field

The current building that there is no an elevator is still most common people's shelter, this also means wherein that part is lost ability to act and the people that lives upstairs has regarded a kind of extravagant hope as on garden downstairs, street, quality of life has a greatly reduced quality, because still do not have so far a kind of can be at the apparatus of common building stair activity, this patent proposes a kind of wheelchair that can stair activity for this reason, as the addendum to market disappearance demand.

Technical background

China enters senescence society in advance, therefore stay in do not have elevator upstairs and the number of having lost ability to act also increasing sharply, but on the stair of common building, by household, help the apparatus of manned stair activity to possess: the 1. power of coupling and relatively little counterweight; 2. can comfortablely take advantage of seat and on stair up and down and the low-angle portable structure of turning; 3. on the inclined-plane of stair, there is the security performance and relative cheap price of turning over after anti-to fall with side, because above demand restricts mutually, so still there is no in the world a kind of apparatus that can use on the narrow stair of common building at present.

Summary of the invention

A kind of wheelchair that can stair activity: the flexible apical axis of ripping bar of its both sides forms and is all arranged on ripping bar lower end by ripping bar sleeve pipe installing rack, flexible apical axis during the flexible apical axis of ripping bar forms is movably arranged in limit casing, and axle body is longitudinally vertically equipped with apical axis operating grip, and apical axis spring is housed after axle, on limit casing tube wall, drawn apical axis and stretched out position and the axle position of retracting, as the apical axis operating grip of passage by groove except by apical axis operating grip to flexible apical axis flexible carry out spacing, also can make apical axis operating grip arrive and stretch out position or retract position, when apical axis operating grip is when apical axis stretches out, flexible apical axis front end is under the tension force of apical axis spring, press the locating dimension auto-extending of apical axis operating grip by groove outside limit casing, now upwards pull and lean on the ripping bar that axletree rotates, ripping bar lower end drives limit casing by ripping bar sleeve pipe installing rack, the apical axis plane of stretching out the flexible apical axis front end outside limit casing is by the arbitrary spoke upper side that prizes it and encounter, by prizing spoke, drive front-wheel to rotate along axletree, wheelchair is with upper lattice stair by the rotational angle of front-wheel thus, when upwards pulling the angle of ripping bar, be finished need pull ripping bar downwards and make flexible apical axis again be returned to acting point time, pull the active force of ripping bar downwards and the apical axis arc surface that makes flexible apical axis termination is encountered to the downside of run into spoke, spoke pushes apical axis arc surface under reverse active force, force flexible apical axis in limit casing, to push backward apical axis spring, after the tension force that has overcome spring, flexible apical axis front end is retracted in limit casing, the flexible apical axis composition of ripping bar relies on ripping bar lower end to be leaned on axletree and oppositely by spoke, gets back to the acting point needing, and flexible apical axis by after spoke under the tension force of apical axis spring, locating dimension by apical axis operating grip by groove stretches out outside limit casing automatically again, the ripping bar that now can continue upwards to pull the fulcrum rotation of leaning on axletree drives wheelchair to go up lattice stair by the rotational angle of front-wheel again, repeatable operation like this, wheelchair has just possessed the function of going upstairs, wheelchair is when going downstairs or level land is used, without using the flexible apical axis of ripping bar, form, can along the apical axis operating grip in limit casing, by the groove apical axis that will stretch, be retracted into the apical axis position of retracting by apical axis operating grip, apical axis front end is retracted in limit casing and no longer ejects, the flexible apical axis composition of ripping bar no longer plays a role under this state.

A kind of wheelchair that can stair activity: be that the wheelchair that prevents from going upstairs glides, the flexible apical axis of wheel carrier has been installed in the design on the wheel carrier sleeve pipe installing rack of wheelchair trailing wheel to be formed: the principle that the flexible apical axis of wheel carrier forms and structure and the flexible apical axis of ripping bar form in full accord, but being arranged on the flexible apical axis of wheel carrier on wheel carrier sleeve pipe installing rack forms when its apical axis operating grip is when the apical axis of limit casing stretches out, the apical axis plane of flexible apical axis front end and apical axis arc surface towards, form at the flexible apical axis of ripping bar with same pieces towards just in time contrary, therefore when trailing wheel is gone upstairs by front-wheel drive, what the spoke upper side of trailing wheel was encountered is the apical axis arc surface of flexible apical axis during the flexible apical axis of wheel carrier forms, active force forces flexible apical axis in limit casing, to push backward apical axis spring, after the tension force that has overcome spring, flexible apical axis front end is retracted in limit casing, when the flexible apical axis composition of wheel carrier is able to by spoke, therefore trailing wheel has also rotated the angle identical with front-wheel under front-wheel drives above stair, when but the angle of upwards pulling ripping bar when front-wheel is finished and need pulls ripping bar downwards and the flexible apical axis of ripping bar is formed being again returned to acting point, the power that wheelchair makes progress on stair disappears, wheel can be with the gravity down sliding of wheelchair on stair inclined-plane, when this slip produces, the spoke of trailing wheel is in rotation backward, what its downside was encountered is the apical axis plane of the flexible apical axis during the flexible apical axis of wheel carrier forms, apical axis plane will be blocked spoke rotation backward, the motion that wheelchair glides on stair is formed automatically and stops by the flexible apical axis of wheel carrier, the active force gliding is further passed to rear wheel support by wheel carrier sleeve pipe installing rack and axletree, then by oneself, possesses backward the friction on the Jiao Taiyu ground, projection oblique angle on the trailing wheel of one-way stop automatically, stoped the downslide of wheelchair on stair, making front-wheel pull ripping bar downwards forms and is again returned to acting point by the flexible apical axis of ripping bar, and then upwards pull ripping bar and drive front-wheel continue upwards to turn an angle moving being continued of upper new lattice stair to carry out, wheelchair is when going downstairs or level land is used, without using the flexible apical axis of wheel carrier, form, can along the apical axis operating grip in limit casing, by the groove apical axis that will stretch, be retracted into the apical axis position of retracting by its apical axis operating grip, apical axis front end is retracted in limit casing and no longer ejects, the flexible apical axis composition of wheel carrier also no longer plays a role under this state.

A kind of wheelchair that can stair activity: when wheelchair is used on level land, because front-wheel and vehicle frame are fixing, can not turn to, for convenience of level land, use, wheelchair trailing wheel can turn to by rear wheel support, but wheelchair is when stair activity, because active force strengthens, therefore trailing wheel does not allow again to turn to when stair activity in case wheel lateral deviation under gravity, the design has installed the flexible apical axis composition in location on wheel carrier groove seat for this reason: the principle that the flexible apical axis in location forms and structure are also in full accord with the flexible apical axis composition of ripping bar, because the turning function of both sides trailing wheel is that wheel carrier back shaft by load-bearing on rear wheel support is through the flat board in wheel carrier side plate and flat board, wheel carrier horizontal bearing, the lower frid of wheel carrier groove seat is realized: it is that shaft core driving rear-axle steering rotates that the wheel carrier side plate under wheel carrier groove seat and the flat board in flat board rely on wheel carrier back shaft, and the flexible apical axis composition in location is arranged on wheel carrier groove seat, owing to leaving concentric holes on the lower frid at wheel carrier groove seat and the flat board in wheel carrier side plate and flat board, flexible apical axis during this bore dia forms with the flexible apical axis in location is identical, therefore when the apical axis operating grip of the flexible apical axis composition in location is dialled apical axis at limit casing and is stretched out, the external part of flexible apical axis is under the tension force of apical axis spring, to inject in the lower frid and the dull and stereotyped concentric holes in wheel carrier side plate and flat board of wheel carrier groove seat simultaneously, wheel carrier side plate and flat board can not rotate under wheel carrier groove seat again, the turning function of trailing wheel is terminated, thereby ensured the safety of wheelchair stair activity, when wheelchair is used on level land, the apical axis operating grip during the flexible apical axis in location is formed is dialled in apical axis retraction position by groove along the apical axis operating grip of limit casing, and the front end of flexible apical axis is retracted in limit casing, and the turning function of trailing wheel can recover.

Wheelchair that can stair activity: in the design can stair activity a wheelchair, the front-wheel of its both sides and trailing wheel are all comprised of projection oblique angle glue tire, wheel frame, spoke, wheel hub, wheel shaft; Its each projection front end of the projection oblique angle glue tire of the front and rear wheel unique design of wheelchair all possesses oblique angle upwards, ensure that when wheelchair is gone upstairs, each projection can block the right angle that each lattice stair tread forms in time at the volley with the larger elevation angle, and utilize its frictional force that projection oblique angle glue the form of the foetus is become, make the kinetic force that wheelchair is gone upstairs drive front-wheel to rotate to stair top; And wheelchair is taken turns preceding mode while going downstairs afterwards, each projection of projection oblique angle glue tire all rolls across whole oblique angle then with the first kiss the earth of the top of the horn of upper end, oblique angle, relatively strengthened the stability of front and rear wheel and ground contact point, wheelchair safety under the control of brake gear is gone downstairs.

A kind of wheelchair that can stair activity: the front-wheel of wheelchair is large, so radius size is also large, to utilize the larger radius of the relative stair lattice of front-wheel height to go upstairs; Trailing wheel is little, makes wheelchair stop the unidirectional auto-stopping disorder of internal organs center of gravity gliding from stair relatively to reduce.

Wheelchair that can stair activity: wheelchair both sides front-wheel when going upstairs is that first drivewheel, wheelchair front-wheel when going upstairs contacts stair, power is preposition acts in the function that wheelchair goes upstairs power completely, has avoided pushing the loss of colliding with to power.

A kind of wheelchair that can stair activity: it is characterized in that: ripping bar is all equipped with in left and right sides front-wheel outside: ripping bar is comprised of ripping bar lower end, ripping bar installing rack, ripping bar upper end, screens heading, ripping bar handle, ripping bar folding and unfolding draw-in groove, termination, ripping bar lower end is provided with the flexible apical axis of ripping bar by ripping bar sleeve pipe installing rack and forms, ripping bar installing rack is arranged on the wheel shaft of front-wheel and leans on the motion fulcrum into ripping bar, because fulcrum is coaxial with front-wheel, therefore the flexible apical axis of ripping bar that install termination, ripping bar lower end forms the acting point that can arrive the arbitrary needs of front wheel spider in the circular motion up and down of ripping bar, prizes front-wheel and rotates forward, in the bar cylinder of ripping bar lower end, be set with ripping bar upper end, before the moving ripping bar of plate, first extract ripping bar upper end out need lengthening length, by screens, head a ball automatically fixing, length from ripping bar handle to ripping bar installing rack center line just can significantly lengthen like this, the length that this of ripping bar is lengthened out is in use equivalent to the force side of lever, and being equivalent to the acting of lever, the radius size of the front-wheel being prized holds, both sizes differ greatlyr, according to lever principle, pull ripping bar hands handle, and to take the ripping bar installing rack being arranged on front-wheel wheel shaft be motion fulcrum, drive front-wheel just less to the power of rotating required use on stair, with this, make the power that wheelchair is gone upstairs be able to effective realization.

A kind of wheelchair that can stair activity: rotate forward separately because the ripping bar of left and right sides prizes respectively the front-wheel of left and right sides, so when wheelchair enters stair corner, the ripping bar of only pulling a side drives corresponding front-wheel to rotate forward, the front-wheel of opposite side can not rotate admittedly because of unpowered, there is thus the monolateral kinestate turning in wheelchair, wheelchair has been realized the turning of wide-angle whereby, to adapt to the actual needs that in reality, wheelchair is gone upstairs in turning; In addition, at wheelchair when using ripping bar, can be by the bar cylinder of ripping bar upper end indentation ripping bar lower end, after head a ball and automatically fixes by screens, ripping bar can folding and unfolding enter to be arranged in the ripping bar folding and unfolding draw-in groove in rear wheel frame raker beam, and Convenient wheelchair is gone downstairs or the use on level land.

A kind of wheelchair that can stair activity: it is characterized in that: front-wheel support is all housed on the axletree of both sides front-wheel; Rear wheel support is also housed on the axletree of both sides trailing wheel, rear wheel support is by vertical brace plate, wheel carrier sleeve pipe installing rack, wheel carrier side plate and flat board, wheel carrier back shaft, and the parts such as wheel carrier horizontal bearing, wheel carrier groove seat, rear wheel frame raker beam, rear wheel frame support beam, cart handle beam, handle support beam form; Between the front and rear wheel of both sides, all rely on tie-beam under tie-beam in front and back wheel, front and back wheel, handrail beam to form and connect, center of gravity reach when this body frame structure for automotive has guaranteed wheelchair heavy burden stair activity, reclining backward while preventing wheelchair stair activity; In addition, the front end of the upper and lower tie-beam of front and rear wheel and handrail beam is all connected with the outer panel of front-wheel support, rear end is all connected with rear wheel frame support beam with the rear wheel frame raker beam of rear wheel support inner side, therefore the width between the wheelchair both sides trailing wheel after assembling is greater than the width that square crossing sliding seat forms, and guarantee wheelchair can not turned on one's side in use.

A kind of wheelchair that can stair activity: between both sides trailing wheel nave boss and vertical brace plate, by axletree, hub band brake dish is housed, brake lever, brake installing plate are housed on cart handle beam, by brake steel wire, connect the skidding function that hub band brake dish is realized wheelchair: wheelchair is controlled the rhythm of going downstairs by brake function when going downstairs, during turning, by monolateral brake, help to turn to.

Wheelchair that can stair activity: between the angle that wheelchair forms at two side handrail beams and rear wheel frame support beam, a protection network is housed, prevents that wheelchair from going upstairs and encounter rider's hands arm while using ripping bar; Wheelchair is equipped with handrail base plate, handrail foreskin on two side handrail beams.

A kind of wheelchair that can stair activity: it is characterized in that: symmetrical wheelchair both sides can inwardly be received folded, is conveniently putting middle saving space, the folded main dependence level intersection activity retraction rack of receipts of wheelchair has formed: the handle base plate of its retraction handles forms cross with the frid top board of rotation positioning groove plate and is fixedly connected with, connecting portion is also fixedly equipped with rotation pulling shaft, and the other end activity of pulling shaft is through in pulling shaft sleeve pipe, pulling shaft sleeve pipe is fixedly mounted on the termination between upper and lower linkage board two plates, after pulling shaft sleeve pipe, trailing wheel left and right sides intersection activity push rod is also housed between two plates of upper and lower linkage board, the left and right sides termination of movable push rod is overlapping up and down, and leave installing hole on the overlapping central point of two bars, by push rod movable bolt, trailing wheel left and right sides overlapping between upper and lower linkage board and two plates is intersected to the activity of movable top rod end head and be worn together, trailing wheel left and right sides intersection activity push rod another termination is separately flexibly connected with the push rod mounting groove that is arranged on rear wheel frame raker beam inner side, and locates by mounting groove movable bolt, the other end of upper and lower linkage board is installed with the upper and lower overlapping front-wheel left and right sides intersection activity push rod in termination between two plates by push rod movable bolt with the same manner, front-wheel left and right sides intersection activity push rod another termination separately is flexibly connected with the push rod mounting groove that is arranged on front-wheel support inner side, is also to locate by mounting groove movable bolt, front-wheel left and right sides intersection activity push rod outboard beam is equipped with push rod spacer with it mutually, level intersection activity retraction rack forms when wheelchair is used, upper and lower overlapping rear, front-wheel left and right sides intersection activity push rod, be all horizontal alignment shape, thereby wheelchair is strutted to Breadth Maximum, now rotate locating slot also horizontal, its afterbody has withstood upper and lower two the overlapping terminations of trailing wheel left and right sides intersection activity push rod, make these two push rods under the state of alignment can not after move, and front-wheel left and right sides intersection activity push rod is because its outboard beam is equipped with supporting push rod spacer with it mutually, these two push rods can not be moved forward under the state of alignment, because afterwards, front-wheel left and right sides intersection activity push rod is upper and lower, all there is the linkage from top to bottom plate being flexibly connected by push rod movable bolt to be connected as a single entity, because of after this, front-wheel left and right sides intersection activity push rod interacts after horizontal alignment, can not after move and can not move forward, stably by wheelchair support to Breadth Maximum, when wheelchair, finish using and need to receive when folded, retraction handles is rotated to 45° angle, by the frid top board driven rotary positioning groove plate being fixedly connected with handle base plate, also rotate 45° angle, frid is vertical configuration, its afterbody is also because rotation displacement has been decontroled being the support of two overlapping terminations of the trailing wheel left and right sides intersection activity push rod of horizontal alignment shape, and can only blocking front-wheel left and right sides intersection activity push rod mutually, push rod spacer can not move forward, after movable push rod, move unrestricted, so now pull back retraction handles, on handle drives, after lower linkage board is synchronous, move, linkage board again by roof movement bolt cause upper and lower overlapping after, front-wheel left and right sides intersection activity push rod is cross transposition backward, the other end of each movable push rod mounting groove movable bolt and push rod mounting groove separately by separately under active force pulls the trailing wheel raker beam of both sides and the front-wheel support of both sides to come closer, wheelchair is reached narrow the object of width, reuse before wheelchair, promote retraction handles forward until front-wheel left and right side intersection activity push rod is encountered the outboard beam push rod spacer of dress and can not be again during to reach mutually with it mutually, afterwards, front-wheel left and right sides intersection activity push rod is that oneself is horizontal alignment, again retraction handles is rotated to 45° angle, make to rotate positioning groove plate afterbody and withstand behind two upper and lower overlapping terminations of trailing wheel left and right sides intersection activity push rod, wheelchair recovers to use.

A kind of wheelchair that can stair activity: it is characterized in that: wheelchair both sides can inwardly fold, but softened when wheelchair parts are used is to be flexibly connected to Breadth Maximum, and wheelchair stair activity often occur that single wheel is first gone up or first under situation, cause the one-sided load-bearing of wheelchair, stability for reinforcement level intersection activity retraction rack composition, must design hard-caked sediment seat stacked to be received to meet the inhomogeneous needs of wheelchair both sides load-bearing, the design's square crossing sliding seat composition is achieved in that Wheelchair support inner side is provided with seat front mounting plate before both sides, installing plate after seat being installed in the trailing wheel raker beam of both sides, before the seat of both sides, between rear installing plate, be set with chair mounted axle, between the chair mounted axle of both sides, the seat right side load-bearing number pair of having hung seat left side bearing strip and pairing is worn in symmetrical activity, every pair of left side, a left side for right side bearing strip, termination, right side all by installing hole movable set on a left side, in right-side seat installation shaft, the other end of bearing strip is all through on seat active plate and is flexibly connected by seat bearing strip movable axis symmetry, when wheelchair is used, seat is left, right side bearing strip is left behind equal level when relative, be connected edges of boards lid with the seat of seat active plate one and blocked a seat left side, side slat body on the bearing strip of right side, under the support of seat bearing strip movable axis, the symmetrical seat of installing is left, right side bearing strip can not continue to sink, therefore square crossing sliding seat forms and can seat people use, and rider's weight has been pushed down a seat left side, right side bearing strip makes it keep level, further the auxiliary level intersection activity retraction rack composition of having consolidated struts its both sides the stability of Breadth Maximum when wheelchair is used, when rider's wheelchair that gets off is finished using, when need the inside receipts in wheelchair both sides be folded by level intersection activity retraction rack composition, every a pair of seat left and right side bearing strip is all under the active force shrinking, left and right sides chair mounted axle be take as center of circle rotation in one end, the other end utilizes the square crossing on seat active plate of seat bearing strip movable axis upwards to rotate mutually, completes upwards folding that square crossing sliding seat forms, square crossing sliding seat is equipped with the seat cushion with backrest cushion one on forming.

A kind of wheelchair that can stair activity: it is characterized in that: the square crossing step of wheelchair forms also and can square crossing draw in, and can further receive backward folded: the step motion bar of both sides is movably arranged on the inner side wheel shaft of front-wheel by installing hole, acutangulate with step motion bar shape is connecting rod in step, and the step connecting rod of support that connection motion bar and upper connecting rod angle form is arranged on the back side of this two rod ends head, like this when square crossing step composition puts down preparation step, pull lower step motion bar, motion bar drives in step connecting rod and step connecting rod of support to take wheel shaft and rotates forward as the center of circle, when forwarding the angle needing to, the step connecting rod of support that is arranged on the link end back side in step motion bar and step has just in time withstood the medial branch fagging of front-wheel support, and with this, forms square crossing step and form the stress point bear step gravity and not drop, when when using step to form, mention that square crossing step forms and to pusher, step motion bar still be take wheel shaft as the center of circle, drive whole square crossing step to form to plough under that the square crossing sliding seat of wheelchair forms is received backward folded below, square crossing step step form except can receive backward folded, the square crossing that makes progress of its both sides receives that folded principle and structure are basic to be formed consistent with the square crossing sliding seat of wheelchair: the angle front end of connecting rod formation in the step motion bar of square crossing step composition both sides and step, installing plate after step axle front mounting plate and step axle is all housed, before, step installation shaft is all housed between rear installing plate, between both sides step installation shaft, step left side bearing strip and step right side load-bearing number pair have been installed in symmetrical activity, a left side for every pair of bearing strip, termination, right side is all worn and is hung in left and right sides step installation shaft by installing hole activity, step is left, another termination of right side bearing strip is through on step active plate and is flexibly connected by step bearing strip movable axis correspondence, when in using, the equal level of step left and right side bearing strip is relative, blocked side slat body on step left and right side bearing strip with the step connecting plate upper cover of step active plate one, under the support of step bearing strip movable axis, the symmetrical step left and right side bearing strip of installing can not continue to sink, therefore square crossing step forms can load-bearing step, and the gravity of step has been pushed down step left and right side bearing strip, make it keep level, when wheelchair is finished using, when need the inside receipts in wheelchair both sides be folded by level intersection activity retraction rack composition, every a pair of step left and right side bearing strip all under the active force shrinking one end take left and right sides step installation shaft and rotate as the center of circle, the other end utilizes the square crossing on step active plate of step bearing strip movable axis upwards to rotate mutually, completes upwards folding that square crossing step forms.

Accompanying drawing explanation

Fig. 1 is the design's overall schematic; Fig. 2 is that the flexible apical axis composition of A-A ripping bar (1) of Fig. 1 turns to enlarged drawing; Fig. 3 is the right view of Fig. 1; Fig. 4 is the left view of Fig. 1; Fig. 5 is that the B-B level intersection activity retraction rack of Fig. 1 forms the schematic diagram of (50); Fig. 6 is that the C-C square crossing sliding seat of Fig. 1 forms the schematic diagram of (64); Fig. 7 is that the D-D square crossing step of Fig. 1 forms the schematic diagram of (75).

In figure: 1. the flexible apical axis of ripping bar forms, 2. the flexible apical axis of wheel carrier forms, 3. the flexible apical axis in location forms, 4. apical axis stretches, 5. apical axis plane, 6. apical axis arc surface, 7. apical axis behaviour does hands handle, 8. apical axis spring, 9. limit casing, 10. apical axis stretches out position, 11. apical axis retraction positions, 12. apical axis behaviour make handle and pass through groove, 13. ripping bar sleeve pipe installing racks, 14. front-wheels, 15. trailing wheels, 16. projection oblique angle glue tires, 17. take turns frame, 18. spokes, 19. wheel hubs, 20. wheel shafts, 21. ripping bars, 22. ripping bar lower ends, 23. ripping bar installing racks, 24. ripping bar upper ends, 25. screens headings, 26. ripping bar hands handles, 27. ripping bar folding and unfolding draw-in grooves, 28 front-wheel supports, 29. rear wheel supports, 30. vertical brace plates, 31. wheel carrier sleeve pipe installing racks, 32. wheel carrier side plate and flat boards, 33. wheel carrier back shafts, 34. wheel carrier horizontal bearings, 35. wheel carrier groove seats, 36. rear wheel frame raker beam, 37. rear wheel frame support beams, 38. cart handle beams, 39. handle support beams, tie-beam in 40. front and back wheels, tie-beam under 41. front and back wheels, 42. handrail beams, 43. handrail base plates, 44. handrail foreskins, 45. brake levers, 46. brake installing plates, 47. brake steel wires, 48. hub band brake dishes, 49. protection networks, 50. level intersection activity retraction racks form, 51. retraction handles, 52. handle base plates, 53. rotation positioning groove plates, 54. frid top boards, 55. rotation pulling shafts, 56. pulling shaft sleeve pipes, 57. linkage from top to bottom plates, 58. trailing wheel left and right sides intersection activity push rods, 59. push rod movable bolts, 60. push rod mounting grooves, 61. mounting groove movable bolts, 62. front-wheel left and right sides intersection activity push rods, 63. push rod spacers, 64. square crossing sliding seats form, 65. seat front mounting plates, installing plate after 66. seats, 67 chair mounted axles, 68. seat left side bearing strips, 69. seat right side bearing strips, 70. seat bearing strip movable axis, 71. seat active plates, 72. seats connect edges of boards lid, 73. seat cushions, 74. backrest cushions, 75. square crossing steps form, 76. step motion bars, connecting rod in 77. steps, 78. step connecting rod of supports, 79. step axle front mounting plates, installing plate after 80. step axles, 81. step installation shaft, 82. step left side bearing strips, 83. step right side bearing strips, 84. step bearing strip movable axis, 85. step active plates, 86. steps connect edges of boards lid.

The specific embodiment

A kind of wheelchair that can stair activity: the flexible apical axis of ripping bar of its both sides forms (1) and is all arranged on ripping bar lower end (22) by ripping bar sleeve pipe installing rack (13), the flexible apical axis (4) that the flexible apical axis of ripping bar forms in (1) is movably arranged in limit casing (9), and axle body is longitudinally vertically equipped with apical axis operating grip (7), and apical axis spring (8) is housed after axle, on limit casing (9) tube wall, draw apical axis and stretched out position (10) and an axle retraction position (11), as the apical axis operating grip of passage by groove (12) except by apical axis operating grip (7) to flexible apical axis (4) flexible carry out spacing, also can make apical axis operating grip (7) arrive and stretch out position or retract position, when apical axis operating grip (7) is when apical axis stretches out position (10), flexible apical axis (4) front end is under the tension force of apical axis spring (8), press the locating dimension auto-extending of apical axis operating grip by groove (12) outside limit casing (9), now upwards pull the ripping bar (21) that partial axletree (20) rotates, ripping bar lower end (22) drives limit casing (9) by ripping bar sleeve pipe installing rack (13), the apical axis plane (5) of stretching out flexible apical axis (4) front end outside limit casing (9) is by arbitrary spoke (18) upper side that prizes it and encounter, by prizing spoke (18), drive front-wheel (14) to rotate along axletree (20), wheelchair is with upper lattice stair by the rotational angle of front-wheel (14) thus, when upwards pulling the angle of ripping bar (21), be finished need pull ripping bar (21) downwards and make flexible apical axis (4) again be returned to acting point time, the active force of pulling ripping bar (21) downwards will make the apical axis arc surface (6) of flexible apical axis (4) termination encounter the downside of run into spoke (18), spoke (18) pushes apical axis arc surface (6) under reverse active force, force flexible apical axis (4) in limit casing (9), to push backward apical axis spring (8), after the tension force that has overcome spring, flexible apical axis (4) front end is retracted in limit casing (9), the flexible apical axis composition of ripping bar (1) relies on ripping bar lower end (22) to be leaned on axletree (20) and oppositely by spoke (18), gets back to the acting point needing, and flexible apical axis (4) by after spoke (18) under the tension force of apical axis spring (8), locating dimension by apical axis operating grip by groove (12) stretches out automatically again outside limit casing (9), now can continue upwards to pull the ripping bar (21) that the fulcrum of partial axletree (20) rotates drives wheelchair to go up lattice stair by the rotational angle of front-wheel (14) again, repeatable operation like this, wheelchair has just possessed the function of going upstairs, wheelchair is when going downstairs or level land is used, without using the flexible apical axis of ripping bar, form (1), can along the apical axis operating grip in limit casing (9), by groove (12) apical axis (4) that will stretch, be retracted into the apical axis position (11) of retracting by apical axis operating grip (7), apical axis front end is retracted in limit casing (9) and no longer ejects, the flexible apical axis of ripping bar forms (1) and no longer plays a role under this state, for the wheelchair that prevents from going upstairs glides, the flexible apical axis of wheel carrier has been installed in the design on the wheel carrier sleeve pipe installing rack (31) of wheelchair trailing wheel (15) and has been formed (2): it is in full accord that the flexible apical axis of the principle of the flexible apical axis composition of wheel carrier (2) and structure and ripping bar has formed (1), but the flexible apical axis of wheel carrier being arranged on wheel carrier sleeve pipe installing rack (31) forms (2) when its apical axis operating grip (7) is when the apical axis of limit casing (9) stretches out position (10), the apical axis plane (5) of flexible apical axis (4) front end and apical axis arc surface (6) towards, with same pieces the flexible apical axis of ripping bar form (1) towards just in time contrary, therefore when trailing wheel (15) is gone upstairs by front-wheel (14) drive, what spoke (18) upper side of trailing wheel (15) was encountered is the apical axis arc surface (6) that the flexible apical axis of wheel carrier forms flexible apical axis (4) in (2), active force forces flexible apical axis (4) in limit casing (9), to push backward apical axis spring (8), after the tension force that has overcome spring, flexible apical axis (4) front end is retracted in limit casing (9), when the flexible apical axis composition of wheel carrier (2) is able to by spoke (18), trailing wheel (15) has therefore also rotated the angle identical with front-wheel to stair top under front-wheel (14) drives, when but the angle of upwards pulling ripping bar (21) when front-wheel (14) is finished and need pulls ripping bar (21) downwards and make the flexible apical axis of ripping bar form (1) to be again returned to acting point, the power that wheelchair makes progress on stair disappears, wheel can be with the gravity down sliding of wheelchair on stair inclined-plane, when this slip produces, the spoke (18) of trailing wheel (15) is in rotation backward, what its downside was encountered is the apical axis plane (5) that the flexible apical axis of wheel carrier forms the flexible apical axis (4) in (2), apical axis plane will be blocked spoke (18) rotation backward, the motion that wheelchair glides on stair is formed (2) by the flexible apical axis of wheel carrier and automatically stops, the active force gliding is further passed to rear wheel support (29) by wheel carrier sleeve pipe installing rack (31) and axletree (20), then by possessing backward the friction on projection oblique angle glue tire (16) on the trailing wheel (15) of one-way stop automatically and ground, stoped the downslide of wheelchair on stair, making front-wheel (14) pull ripping bar (21) downwards allows the flexible apical axis composition of ripping bar (1) again be returned to acting point, and then upwards pull ripping bar (21) and drive front-wheel (14) continue upwards to turn an angle moving being continued of upper new lattice stair to carry out, wheelchair is when going downstairs or level land is used, without using the flexible apical axis of wheel carrier, form (2), can along the apical axis operating grip in limit casing (9), by groove (12) apical axis (4) that will stretch, be retracted into the apical axis position (11) of retracting by its apical axis operating grip (7), apical axis front end is retracted in limit casing (9) and no longer ejects, the flexible apical axis of wheel carrier forms (2) and also no longer plays a role under this state, when wheelchair is used on level land, because front-wheel (14) and vehicle frame are fixing, can not turn to, for convenience of level land, use, wheelchair trailing wheel (15) can turn to by rear wheel support (29), but wheelchair is when stair activity, because active force strengthens, therefore trailing wheel (15) does not allow again to turn to when stair activity in case wheel lateral deviation under gravity, the design has installed and has located flexible apical axis composition (3) on wheel carrier groove seat (35) for this reason: the principle of the flexible apical axis composition in location (3) and structure are also in full accord with the flexible apical axis composition of ripping bar (1), because the turning function of both sides trailing wheel (15) is that wheel carrier back shaft (33) by the upper load-bearing of rear wheel support (29) is through the flat board in wheel carrier side plate and flat board (32), wheel carrier horizontal bearing (34), the lower frid of wheel carrier groove seat (35) is realized: the flat board in the wheel carrier side plate under wheel carrier groove seat (35) and flat board (32) relies on wheel carrier back shaft (33) for the rotation of shaft core driving rear-axle steering, and the flexible apical axis composition in location (3) is arranged on wheel carrier groove seat (35), owing to leaving concentric holes on the flat board in the lower frid at wheel carrier groove seat (35) and wheel carrier side plate and flat board (32), this bore dia is identical with the flexible apical axis (4) that the flexible apical axis in location forms in (3), therefore the apical axis operating grip that forms (3) when the flexible apical axis in location is dialled when the apical axis of limit casing (9) stretches out position (10), the external part of flexible apical axis (4) is under the tension force of apical axis spring (8), to inject in the lower frid and the dull and stereotyped concentric holes in wheel carrier side plate and flat board (32) of wheel carrier groove seat (35) simultaneously, wheel carrier side plate and flat board (32) can not be again in the lower rotations of wheel carrier groove seat (35), the turning function of trailing wheel (15) is terminated, thereby ensured the safety of wheelchair stair activity, when wheelchair is used on level land, the apical axis operating grip (7) that to locate in flexible apical axis composition (3) is dialled in apical axis retraction position (11) by groove (12) along the apical axis operating grip of limit casing (9), the front end of flexible apical axis (4) is retracted in limit casing (9), and the turning function of trailing wheel (15) can recover, in the design can stair activity wheelchair, the front-wheel of its both sides (14) and trailing wheel (15) are all comprised of projection oblique angle glue tire (16), wheel frame (17), spoke (18), wheel hub (19), wheel shaft (20), its each projection front end of the projection oblique angle glue tire (16) of the front and rear wheel of wheelchair (14) (15) unique design all possesses oblique angle upwards, ensure that when wheelchair is gone upstairs, each projection can block the right angle that each lattice stair tread forms in time at the volley with the larger elevation angle, and utilize its frictional force that projection oblique angle glue tire (16) is formed, make the kinetic force that wheelchair is gone upstairs drive front-wheel (14) to rotate to stair top, and wheelchair (15) the preceding mode of taking turns is afterwards when go downstairs, each projection of projection oblique angle glue tire (16) all rolls across whole oblique angle then with the first kiss the earth of the top of the horn of upper end, oblique angle, relatively strengthened the stability of front and rear wheel (14) (15) with ground contact point, wheelchair safety under the control of brake gear is gone downstairs, the front-wheel of wheelchair (14) is large, so radius size is also large, to utilize the larger radius of the relative stair lattice of front-wheel height to go upstairs, trailing wheel is little, makes wheelchair stop the unidirectional auto-stopping disorder of internal organs center of gravity gliding from stair relatively to reduce, wheelchair both sides front-wheel (14) when going upstairs is that first drivewheel, wheelchair front-wheel (14) when going upstairs contact stair, and power is preposition acts in the function that wheelchair goes upstairs power completely, has avoided pushing the loss of colliding with to power.

Wheelchair that can stair activity, is characterized in that: ripping bar (21) is all equipped with in left and right sides front-wheel (14) outside: ripping bar (21) is comprised of ripping bar lower end (22), ripping bar installing rack (23), ripping bar upper end (24), screens heading (25), ripping bar handle (26), ripping bar folding and unfolding draw-in groove (27), termination, ripping bar lower end (22) is provided with the flexible apical axis of ripping bar by ripping bar sleeve pipe installing rack (13) and forms (1), ripping bar installing rack (23) is arranged on the wheel shaft (20) of front-wheel (14) and goes up and lean on the motion fulcrum into ripping bar (21), because fulcrum is coaxial with front-wheel, therefore the flexible apical axis of ripping bar that install termination, ripping bar lower end (22) forms the acting point that (1) can arrive the arbitrary needs of front-wheel (14) spoke (18) in the circular motion up and down of ripping bar (21), prizes front-wheel (14) and rotates forward, in the bar cylinder of ripping bar lower end (22), be set with ripping bar upper end (24), plate moves the front length that need to lengthen of first ripping bar upper end (24) being extracted out of ripping bar (21), by screens head a ball (25) automatically fixing, length from ripping bar handle (26) to ripping bar installing rack (23) center line just can significantly lengthen like this, this length being lengthened out in use of ripping bar (21) is equivalent to the force side of lever, and the radius size of the front-wheel being prized (14) is equivalent to the acting end of lever, both sizes differ greatlyr, according to lever principle, pull ripping bar handle (26), and to take the ripping bar installing rack (23) being arranged on front-wheel (14) wheel shaft (20) be motion fulcrum, drive front-wheel (14) just less to the power of rotating required use on stair, with this, make the power that wheelchair is gone upstairs be able to effective realization, because the ripping bar of left and right sides (21) prizes respectively the front-wheel (14) of left and right sides and rotates forward separately, so when wheelchair enters stair corner, the ripping bar (21) of only pulling a side drives corresponding front-wheel (14) to rotate forward, the front-wheel of opposite side can not rotate admittedly because of unpowered, there is thus the monolateral kinestate turning in wheelchair, wheelchair has been realized the turning of wide-angle whereby, to adapt to the actual needs that in reality, wheelchair is gone upstairs in turning, in addition, at wheelchair when using ripping bar (21), can be by the bar cylinder of indentation ripping bar lower end, ripping bar upper end (24) (22), by screens head a ball (25) automatically fixing after, ripping bar (21) can folding and unfolding enter to be arranged in the ripping bar folding and unfolding draw-in groove (27) in rear wheel frame raker beam (36), and Convenient wheelchair is gone downstairs or the use on level land.

Wheelchair that can stair activity, is characterized in that: on the axletree (20) of both sides front-wheel (14), front-wheel support (28) is all housed; On the axletree (20) of both sides trailing wheel (15), rear wheel support (29) is also housed, rear wheel support (29) is by vertical brace plate (30), wheel carrier sleeve pipe installing rack (31), wheel carrier side plate and flat board (32), wheel carrier back shaft (33), and the parts such as wheel carrier horizontal bearing (34), wheel carrier groove seat (35), rear wheel frame raker beam (36), rear wheel frame support beam (37), cart handle beam (38), handle support beam (39) form; Between the front and rear wheel of both sides (14) (15), all relying on tie-beam (41) under tie-beam in front and back wheel (40), front and back wheel, handrail beam (42) to form connects, center of gravity reach when this body frame structure for automotive has guaranteed wheelchair heavy burden stair activity, reclining backward while preventing wheelchair stair activity; In addition, the front end of the upper and lower tie-beam of front and rear wheel (40) (41) and handrail beam (42) is all connected with the outer panel of front-wheel support (28), rear end is all connected with rear wheel frame support beam (37) with the rear wheel frame raker beam (36) of rear wheel support (29) inner side, therefore the width between the wheelchair both sides trailing wheels (15) after assembling is greater than the width that square crossing sliding seat forms (64), and guarantee wheelchair can not turned on one's side in use; Between both sides trailing wheel (15) nave boss (19) and vertical brace plate (30), by axletree (20), hub band brake dish (48) is housed, brake lever (45), brake installing plate (46) are housed on cart handle beam (38), by brake steel wire (47), connect the skidding function that hub band brake dish (48) is realized wheelchair: wheelchair is controlled the rhythm of going downstairs by brake function when going downstairs, during turning, by monolateral brake, help to turn to; Wheelchair is equipped with protection network (49) between the angle of two side handrail beams (42) and rear wheel frame support beam (37) formation, prevents from encountering when wheelchair from going upstairs use ripping bar (21) rider's hands arm; Wheelchair is equipped with handrail base plate (43), handrail foreskin (44) on two side handrail beams (42).

Wheelchair that can stair activity, is characterized in that: symmetrical wheelchair both sides can inwardly be received folded, is conveniently putting middle saving space, the folded main dependence level intersection activity retraction rack of receipts of wheelchair forms (50) to be completed: the handle base plate (52) of its retraction handles (51) forms cross with the frid top board (54) of rotation positioning groove plate (53) and is fixedly connected with, connecting portion is also fixedly equipped with rotation pulling shaft (55), and the other end activity of pulling shaft is through in pulling shaft sleeve pipe (56), pulling shaft sleeve pipe (56) is fixedly mounted on the termination between upper and lower linkage board (57) two plates, at pulling shaft sleeve pipe (56) afterwards, trailing wheel left and right sides intersection activity push rod (58) is also housed between two plates of upper and lower linkage board (57), the left and right sides termination of movable push rod is overlapping up and down, and leave installing hole on the overlapping central point of two bars, by push rod movable bolt (59), trailing wheel left and right sides intersection activity push rod (58) termination activity overlapping between upper and lower linkage board (57) and two plates is worn together, trailing wheel left and right sides intersection activity push rod (58) another termination is separately flexibly connected with the push rod mounting groove (60) that is arranged on rear wheel frame raker beam (36) inner side, and by mounting groove movable bolt (61) location, the other end of upper and lower linkage board (57) is installed with the upper and lower overlapping front-wheel left and right sides intersection activity push rod (62) in termination with the same manner by push rod movable bolt (59) between two plates, front-wheel left and right sides intersection activity push rod (62) another termination separately is flexibly connected with the push rod mounting groove (60) that is arranged on front-wheel support (28) inner side, is also to locate by mounting groove movable bolt (61), front-wheel left and right sides intersection activity push rod (62) outboard beam is equipped with push rod spacer (63) with it mutually, level intersection activity retraction rack forms (50) when wheelchair is used, upper and lower overlapping rear, front-wheel left and right sides intersection activity push rod (58) (62), be all horizontal alignment shape, thereby wheelchair is strutted to Breadth Maximum, now rotate locating slot (53) also horizontal, its afterbody has withstood upper and lower two the overlapping terminations of trailing wheel left and right sides intersection activity push rod (58), make these two push rods under the state of alignment can not after move, and front-wheel left and right sides intersection activity push rod (62) the push rod spacer (63) supporting because its outboard beam is equipped with it mutually, these two push rods can not be moved forward under the state of alignment, because rear, front-wheel left and right sides intersection activity push rod (58) (62) is upper and lower, all there is the linkage from top to bottom plate (57) being flexibly connected by push rod movable bolt (59) to be connected as a single entity, because of after this, front-wheel left and right sides intersection activity push rod (58) (62) interacts after horizontal alignment, can not after move and can not move forward, stably by wheelchair support to Breadth Maximum, when wheelchair, finish using and need to receive when folded, by retraction handles (51) rotation 45° angle, by frid top board (54) the driven rotary positioning groove plate (53) being fixedly connected with handle base plate (52), also rotate 45° angle, frid is vertical configuration, its afterbody is also because rotation displacement has been decontroled being the support of two overlapping terminations of the trailing wheel left and right sides intersection activity push rod (58) of horizontal alignment shape, and can only blocking front-wheel left and right sides intersection activity push rod (62) mutually, push rod spacer (63) can not move forward, after movable push rod, move unrestricted, so now pull back retraction handles (51), on handle drives, after lower linkage board (57) is synchronous, move, linkage board again by roof movement bolt (59) cause upper and lower overlapping after, front-wheel left and right sides intersection activity push rod (58) (62) is cross transposition backward, the other end of each movable push rod mounting groove movable bolt (61) and push rod mounting groove (60) separately by separately under active force pulls the trailing wheel raker beam (36) of both sides and the front-wheel support (28) of both sides to come closer, wheelchair is reached narrow the object of width, reuse before wheelchair, promote forward retraction handles (51) until front-wheel left and right side intersection activity push rod (62) is encountered the outboard beam push rod spacer (63) of dress and can not be again during to reach mutually with it mutually, afterwards, front-wheel left and right sides intersection activity push rod (58) (62) is that oneself is horizontal alignment, again by retraction handles (51) rotation 45° angle, make to rotate positioning groove plate (53) afterbody and withstand behind two upper and lower overlapping terminations of trailing wheel left and right sides intersection activity push rod (58), wheelchair recovers to use.

A kind of wheelchair that can stair activity, it is characterized in that: wheelchair both sides can inwardly fold, but softened when wheelchair parts are used is to be flexibly connected to Breadth Maximum, and wheelchair stair activity often occur that single wheel is first gone up or first under situation, cause the one-sided load-bearing of wheelchair, stability for reinforcement level intersection activity retraction rack composition (50), must design hard-caked sediment seat stacked to be received to meet the inhomogeneous needs of wheelchair both sides load-bearing, the design's square crossing sliding seat forms (64) and is achieved in that Wheelchair support before both sides (28) inner side is provided with seat front mounting plate (65), installing plate (66) after seat being installed in both sides trailing wheel raker beam (36), before the seat of both sides, between rear installing plate (65) (66), be set with chair mounted axle (67), it is several right that between the chair mounted axle of both sides, the seat right side bearing strip (69) of having hung seat left side bearing strip (68) and having matched is worn in symmetrical activity, every pair of left side, a left side for right side bearing strip (68) (69), termination, right side all by installing hole movable set on a left side, in right-side seat installation shaft (67), the other end of bearing strip is all through on seat active plate (71) and is flexibly connected by seat bearing strip movable axis (70) symmetry, when wheelchair is used, seat is left, right side bearing strip (68) (69) is left behind equal level when relative, be connected edges of boards lids (72) with the seat of seat active plate (71) one and blocked a seat left side, the upper side slat body of right side bearing strip (68) (69), under the support of seat bearing strip movable axis (70), the symmetrical seat of installing is left, right side bearing strip (68) (69) can not continue to sink, square crossing sliding seat forms (64) therefore can seat people be used, and rider's weight has been pushed down a seat left side, right side bearing strip (68) (69) makes it keep level, further the auxiliary level intersection activity retraction rack composition (50) of having consolidated struts its both sides the stability of Breadth Maximum when wheelchair is used, when rider's wheelchair that gets off is finished using, when need the inside receipts in wheelchair both sides be folded by level intersection activity retraction rack composition (50), every a pair of seat left and right side bearing strip (68) (69) is all under the active force shrinking, left and right sides chair mounted axle (67) be take as center of circle rotation in one end, the other end utilizes seat bearing strip movable axis (70) upwards to rotate in the upper square crossing of seat active plate (71) mutually, completes square crossing sliding seat and forms the upwards folding of (64), seat cushion (73) with backrest cushion (74) one is housed on square crossing sliding seat composition (64).

A kind of wheelchair that can stair activity, it is characterized in that: the square crossing step of wheelchair forms (75) and also can square crossing draw in, and can further receive backward folded: the step motion bar (76) of both sides is movably arranged on the inner side wheel shaft (20) of front-wheel (14) by installing hole, acutangulate with step motion bar (76) shape is connecting rod in step (77), and the step connecting rod of support (78) that connection motion bar and upper connecting rod angle form is arranged on the back side of this two rod ends head, like this when square crossing step composition (75) puts down preparation step, pull lower step motion bar (76), motion bar drives in step connecting rod (77) and step connecting rod of support (78) to take wheel shaft (20) and rotates forward as the center of circle, when forwarding the angle needing to, the step connecting rod of support (78) that is arranged on connecting rod (77) back side, termination in step motion bar (76) and step has just in time withstood the medial branch fagging of front-wheel support (28), and with this, forms square crossing step and form (75) and bear step gravity and the stress point that do not drop, when forming without use step, mention that square crossing step forms (75) and to pusher, it is the center of circle that step motion bar (76) still be take wheel shaft (20), and what drive that whole square crossing step forms that (75) plough under that the square crossing sliding seat of wheelchair forms (64) is received folded below backward, square crossing step step form (75) except can receive backward folded, the square crossing that makes progress of its both sides is received folded principle and structure square crossing sliding seat basic and wheelchair to form (64) consistent: square crossing step forms the angle front end of connecting rod (77) formation in the step motion bar (76) of (75) both sides and step, installing plate (80) after step axle front mounting plate (79) and step axle is all housed, before, step installation shaft (81) is all housed between rear installing plate, between both sides step installation shaft (81) symmetrical activity step left side bearing strip (82) has been installed and step right side bearing strip (83) several right, a left side for every pair of bearing strip, termination, right side is all worn and is hung in left and right sides step installation shaft (81) by installing hole activity, step is left, another termination of right side bearing strip (82) (83) is through the upper flexible connection of step active plate (85) by step bearing strip movable axis (84) correspondence, when in using, the equal level of step left and right side bearing strip (82) (83) is relative, be connected edges of boards lids (86) with the step of step active plate (85) one and blocked the upper side slat body of step left and right side bearing strip (82) (83), under the support of step bearing strip movable axis (84), the symmetrical step left and right side bearing strip (82) (83) of installing can not continue to sink, square crossing step forms (75) therefore can load-bearing step, and the gravity of step has been pushed down step left and right side bearing strip (82) (83), make it keep level, when wheelchair is finished using, when need the inside receipts in wheelchair both sides be folded by level intersection activity retraction rack composition (50), every a pair of step left and right side bearing strip (82) (83) all under the active force shrinking one end take left and right sides step installation shaft (81) for center of circle rotation, the other end utilizes step bearing strip movable axis (84) upwards to rotate in the upper square crossing of step active plate (85) mutually, completes square crossing step and forms the upwards folding of (75).

Claims

One kind can stair activity wheelchair: the flexible apical axis of ripping bar of its both sides forms (1) and all by ripping bar sleeve pipe installing rack (13), is arranged on ripping bar lower end (22), the flexible apical axis (4) that the flexible apical axis of ripping bar forms in (1) is movably arranged in limit casing (9), and axle body is longitudinally vertically equipped with apical axis operating grip (7), and apical axis spring (8) is housed after axle, on limit casing (9) tube wall, draw apical axis and stretched out position (10) and an axle retraction position (11), as the apical axis operating grip of passage by groove (12) except by apical axis operating grip (7) to flexible apical axis (4) flexible carry out spacing, also can make apical axis operating grip (7) arrive and stretch out position or retract position, when apical axis operating grip (7) is when apical axis stretches out position (10), flexible apical axis (4) front end is under the tension force of apical axis spring (8), press the locating dimension auto-extending of apical axis operating grip by groove (12) outside limit casing (9), now upwards pull the ripping bar (21) that partial axletree (20) rotates, ripping bar lower end (22) drives limit casing (9) by ripping bar sleeve pipe installing rack (13), the apical axis plane (5) of stretching out flexible apical axis (4) front end outside limit casing (9) is by arbitrary spoke (18) upper side that prizes it and encounter, by prizing spoke (18), drive front-wheel (14) to rotate along axletree (20), wheelchair is with upper lattice stair by the rotational angle of front-wheel (14) thus, when upwards pulling the angle of ripping bar (21), be finished need pull ripping bar (21) downwards and make flexible apical axis (4) again be returned to acting point time, the active force of pulling ripping bar (21) downwards will make the apical axis arc surface (6) of flexible apical axis (4) termination encounter the downside of run into spoke (18), spoke (18) pushes apical axis arc surface (6) under reverse active force, force flexible apical axis (4) in limit casing (9), to push backward apical axis spring (8), after the tension force that has overcome spring, flexible apical axis (4) front end is retracted in limit casing (9), the flexible apical axis composition of ripping bar (1) relies on ripping bar lower end (22) to be leaned on axletree (20) and oppositely by spoke (18), gets back to the acting point needing, and flexible apical axis (4) by after spoke (18) under the tension force of apical axis spring (8), locating dimension by apical axis operating grip by groove (12) stretches out automatically again outside limit casing (9), now can continue upwards to pull the ripping bar (21) that the fulcrum of partial axletree (20) rotates drives wheelchair to go up lattice stair by the rotational angle of front-wheel (14) again, repeatable operation like this, wheelchair has just possessed the function of going upstairs, wheelchair is when going downstairs or level land is used, without using the flexible apical axis of ripping bar, form (1), can along the apical axis operating grip in limit casing (9), by groove (12) apical axis (4) that will stretch, be retracted into the apical axis position (11) of retracting by apical axis operating grip (7), apical axis front end is retracted in limit casing (9) and no longer ejects, the flexible apical axis of ripping bar forms (1) and no longer plays a role under this state, for the wheelchair that prevents from going upstairs glides, the flexible apical axis of wheel carrier has been installed in the design on the wheel carrier sleeve pipe installing rack (31) of wheelchair trailing wheel (15) and has been formed (2): it is in full accord that the flexible apical axis of the principle of the flexible apical axis composition of wheel carrier (2) and structure and ripping bar has formed (1), but the flexible apical axis of wheel carrier being arranged on wheel carrier sleeve pipe installing rack (31) forms (2) when its apical axis operating grip (7) is when the apical axis of limit casing (9) stretches out position (10), the apical axis plane (5) of flexible apical axis (4) front end and apical axis arc surface (6) towards, with same pieces the flexible apical axis of ripping bar form (1) towards just in time contrary, therefore when trailing wheel (15) is gone upstairs by front-wheel (14) drive, what spoke (18) upper side of trailing wheel (15) was encountered is the apical axis arc surface (6) that the flexible apical axis of wheel carrier forms flexible apical axis (4) in (2), active force forces flexible apical axis (4) in limit casing (9), to push backward apical axis spring (8), after the tension force that has overcome spring, flexible apical axis (4) front end is retracted in limit casing (9), when the flexible apical axis composition of wheel carrier (2) is able to by spoke (18), trailing wheel (15) has therefore also rotated the angle identical with front-wheel to stair top under front-wheel (14) drives, when but the angle of upwards pulling ripping bar (21) when front-wheel (14) is finished and need pulls ripping bar (21) downwards and make the flexible apical axis of ripping bar form (1) to be again returned to acting point, the power that wheelchair makes progress on stair disappears, wheel can be with the gravity down sliding of wheelchair on stair inclined-plane, when this slip produces, the spoke (18) of trailing wheel (15) is in rotation backward, what its downside was encountered is the apical axis plane (5) that the flexible apical axis of wheel carrier forms the flexible apical axis (4) in (2), apical axis plane will be blocked spoke (18) rotation backward, the motion that wheelchair glides on stair is formed (2) by the flexible apical axis of wheel carrier and automatically stops, the active force gliding is further passed to rear wheel support (29) by wheel carrier sleeve pipe installing rack (31) and axletree (20), then by possessing backward the friction on projection oblique angle glue tire (16) on the trailing wheel (15) of one-way stop automatically and ground, stoped the downslide of wheelchair on stair, making front-wheel (14) pull ripping bar (21) downwards allows the flexible apical axis composition of ripping bar (1) again be returned to acting point, and then upwards pull ripping bar (21) and drive front-wheel (14) continue upwards to turn an angle moving being continued of upper new lattice stair to carry out, wheelchair is when going downstairs or level land is used, without using the flexible apical axis of wheel carrier, form (2), can along the apical axis operating grip in limit casing (9), by groove (12) apical axis (4) that will stretch, be retracted into the apical axis position (11) of retracting by its apical axis operating grip (7), apical axis front end is retracted in limit casing (9) and no longer ejects, the flexible apical axis of wheel carrier forms (2) and also no longer plays a role under this state, when wheelchair is used on level land, because front-wheel (14) and vehicle frame are fixing, can not turn to, for convenience of level land, use, wheelchair trailing wheel (15) can turn to by rear wheel support (29), but wheelchair is when stair activity, because active force strengthens, therefore trailing wheel (15) does not allow again to turn to when stair activity in case wheel lateral deviation under gravity, the design has installed and has located flexible apical axis composition (3) on wheel carrier groove seat (35) for this reason: the principle of the flexible apical axis composition in location (3) and structure are also in full accord with the flexible apical axis composition of ripping bar (1), because the turning function of both sides trailing wheel (15) is that wheel carrier back shaft (33) by the upper load-bearing of rear wheel support (29) is through the flat board in wheel carrier side plate and flat board (32), wheel carrier horizontal bearing (34), the lower frid of wheel carrier groove seat (35) is realized: the flat board in the wheel carrier side plate under wheel carrier groove seat (35) and flat board (32) relies on wheel carrier back shaft (33) for the rotation of shaft core driving rear-axle steering, and the flexible apical axis composition in location (3) is arranged on wheel carrier groove seat (35), owing to leaving concentric holes on the flat board in the lower frid at wheel carrier groove seat (35) and wheel carrier side plate and flat board (32), this bore dia is identical with the flexible apical axis (4) that the flexible apical axis in location forms in (3), therefore the apical axis operating grip that forms (3) when the flexible apical axis in location is dialled when the apical axis of limit casing (9) stretches out position (10), the external part of flexible apical axis (4) is under the tension force of apical axis spring (8), to inject in the lower frid and the dull and stereotyped concentric holes in wheel carrier side plate and flat board (32) of wheel carrier groove seat (35) simultaneously, wheel carrier side plate and flat board (32) can not be again in the lower rotations of wheel carrier groove seat (35), the turning function of trailing wheel (15) is terminated, thereby ensured the safety of wheelchair stair activity, when wheelchair is used on level land, the apical axis operating grip (7) that to locate in flexible apical axis composition (3) is dialled in apical axis retraction position (11) by groove (12) along the apical axis operating grip of limit casing (9), the front end of flexible apical axis (4) is retracted in limit casing (9), and the turning function of trailing wheel (15) can recover, in the design can stair activity wheelchair, the front-wheel of its both sides (14) and trailing wheel (15) are all comprised of projection oblique angle glue tire (16), wheel frame (17), spoke (18), wheel hub (19), wheel shaft (20), its each projection front end of the projection oblique angle glue tire (16) of the front and rear wheel of wheelchair (14) (15) unique design all possesses oblique angle upwards, ensure that when wheelchair is gone upstairs, each projection can block the right angle that each lattice stair tread forms in time at the volley with the larger elevation angle, and utilize its frictional force that projection oblique angle glue tire (16) is formed, make the kinetic force that wheelchair is gone upstairs drive front-wheel (14) to rotate to stair top, and wheelchair (15) the preceding mode of taking turns is afterwards when go downstairs, each projection of projection oblique angle glue tire (16) all rolls across whole oblique angle then with the first kiss the earth of the top of the horn of upper end, oblique angle, relatively strengthened the stability of front and rear wheel (14) (15) with ground contact point, wheelchair safety under the control of brake gear is gone downstairs, the front-wheel of wheelchair (14) is large, so radius size is also large, to utilize the larger radius of the relative stair lattice of front-wheel height to go upstairs, trailing wheel is little, makes wheelchair stop the unidirectional auto-stopping disorder of internal organs center of gravity gliding from stair relatively to reduce, wheelchair both sides front-wheel (14) when going upstairs is that first drivewheel, wheelchair front-wheel (14) when going upstairs contact stair, and power is preposition acts in the function that wheelchair goes upstairs power completely, has avoided pushing the loss of colliding with to power.
2. a kind of wheelchair that can stair activity according to claim 1, is characterized in that: ripping bar (21) is all equipped with in left and right sides front-wheel (14) outside: ripping bar (21) is comprised of ripping bar lower end (22), ripping bar installing rack (23), ripping bar upper end (24), screens heading (25), ripping bar handle (26), ripping bar folding and unfolding draw-in groove (27), termination, ripping bar lower end (22) is provided with the flexible apical axis of ripping bar by ripping bar sleeve pipe installing rack (13) and forms (1), ripping bar installing rack (23) is arranged on the wheel shaft (20) of front-wheel (14) and goes up and lean on the motion fulcrum into ripping bar (21), because fulcrum is coaxial with front-wheel, therefore the flexible apical axis of ripping bar that install termination, ripping bar lower end (22) forms the acting point that (1) can arrive the arbitrary needs of front-wheel (14) spoke (18) in the circular motion up and down of ripping bar (21), prizes front-wheel (14) and rotates forward, in the bar cylinder of ripping bar lower end (22), be set with ripping bar upper end (24), plate moves the front length that need to lengthen of first ripping bar upper end (24) being extracted out of ripping bar (21), by screens head a ball (25) automatically fixing, length from ripping bar handle (26) to ripping bar installing rack (23) center line just can significantly lengthen like this, this length being lengthened out in use of ripping bar (21) is equivalent to the force side of lever, and the radius size of the front-wheel being prized (14) is equivalent to the acting end of lever, both sizes differ greatlyr, according to lever principle, pull ripping bar handle (26), and to take the ripping bar installing rack (23) being arranged on front-wheel (14) wheel shaft (20) be motion fulcrum, drive front-wheel (14) just less to the power of rotating required use on stair, with this, make the power that wheelchair is gone upstairs be able to effective realization, because the ripping bar of left and right sides (21) prizes respectively the front-wheel (14) of left and right sides and rotates forward separately, so when wheelchair enters stair corner, the ripping bar (21) of only pulling a side drives corresponding front-wheel (14) to rotate forward, the front-wheel of opposite side can not rotate admittedly because of unpowered, there is thus the monolateral kinestate turning in wheelchair, wheelchair has been realized the turning of wide-angle whereby, to adapt to the actual needs that in reality, wheelchair is gone upstairs in turning, in addition, at wheelchair when using ripping bar (21), can be by the bar cylinder of indentation ripping bar lower end, ripping bar upper end (24) (22), by screens head a ball (25) automatically fixing after, ripping bar (21) can folding and unfolding enter to be arranged in the ripping bar folding and unfolding draw-in groove (27) in rear wheel frame raker beam (36), and Convenient wheelchair is gone downstairs or the use on level land.
3. a kind of wheelchair that can stair activity according to claim 1, is characterized in that: on the axletree (20) of both sides front-wheel (14), front-wheel support (28) is all housed; On the axletree (20) of both sides trailing wheel (15), rear wheel support (29) is also housed, rear wheel support (29) is by vertical brace plate (30), wheel carrier sleeve pipe installing rack (31), wheel carrier side plate and flat board (32), wheel carrier back shaft (33), and the parts such as wheel carrier horizontal bearing (34), wheel carrier groove seat (35), rear wheel frame raker beam (36), rear wheel frame support beam (37), cart handle beam (38), handle support beam (39) form; Between the front and rear wheel of both sides (14) (15), all relying on tie-beam (41) under tie-beam in front and back wheel (40), front and back wheel, handrail beam (42) to form connects, center of gravity reach when this body frame structure for automotive has guaranteed wheelchair heavy burden stair activity, reclining backward while preventing wheelchair stair activity; In addition, the front end of the upper and lower tie-beam of front and rear wheel (40) (41) and handrail beam (42) is all connected with the outer panel of front-wheel support (28), rear end is all connected with rear wheel frame support beam (37) with the rear wheel frame raker beam (36) of rear wheel support (29) inner side, therefore the width between the wheelchair both sides trailing wheels (15) after assembling is greater than the width that square crossing sliding seat forms (64), and guarantee wheelchair can not turned on one's side in use; Between both sides trailing wheel (15) nave boss (19) and vertical brace plate (30), by axletree (20), hub band brake dish (48) is housed, brake lever (45), brake installing plate (46) are housed on cart handle beam (38), by brake steel wire (47), connect the skidding function that hub band brake dish (48) is realized wheelchair: wheelchair is controlled the rhythm of going downstairs by brake function when going downstairs, during turning, by monolateral brake, help to turn to; Wheelchair is equipped with protection network (49) between the angle of two side handrail beams (42) and rear wheel frame support beam (37) formation, prevents from encountering when wheelchair from going upstairs use ripping bar (21) rider's hands arm; Wheelchair is equipped with handrail base plate (43), handrail foreskin (44) on two side handrail beams (42).
4. a kind of wheelchair that can stair activity according to claim 1, is characterized in that: symmetrical wheelchair both sides can inwardly be received folded, is conveniently putting middle saving space, the folded main dependence level intersection activity retraction rack of receipts of wheelchair forms (50) to be completed: the handle base plate (52) of its retraction handles (51) forms cross with the frid top board (54) of rotation positioning groove plate (53) and is fixedly connected with, connecting portion is also fixedly equipped with rotation pulling shaft (55), and the other end activity of pulling shaft is through in pulling shaft sleeve pipe (56), pulling shaft sleeve pipe (56) is fixedly mounted on the termination between upper and lower linkage board (57) two plates, at pulling shaft sleeve pipe (56) afterwards, trailing wheel left and right sides intersection activity push rod (58) is also housed between two plates of upper and lower linkage board (57), the left and right sides termination of movable push rod is overlapping up and down, and leave installing hole on the overlapping central point of two bars, by push rod movable bolt (59), trailing wheel left and right sides intersection activity push rod (58) termination activity overlapping between upper and lower linkage board (57) and two plates is worn together, trailing wheel left and right sides intersection activity push rod (58) another termination is separately flexibly connected with the push rod mounting groove (60) that is arranged on rear wheel frame raker beam (36) inner side, and by mounting groove movable bolt (61) location, the other end of upper and lower linkage board (57) is installed with the upper and lower overlapping front-wheel left and right sides intersection activity push rod (62) in termination with the same manner by push rod movable bolt (59) between two plates, front-wheel left and right sides intersection activity push rod (62) another termination separately is flexibly connected with the push rod mounting groove (60) that is arranged on front-wheel support (28) inner side, is also to locate by mounting groove movable bolt (61), front-wheel left and right sides intersection activity push rod (62) outboard beam is equipped with push rod spacer (63) with it mutually, level intersection activity retraction rack forms (50) when wheelchair is used, upper and lower overlapping rear, front-wheel left and right sides intersection activity push rod (58) (62), be all horizontal alignment shape, thereby wheelchair is strutted to Breadth Maximum, now rotate locating slot (53) also horizontal, its afterbody has withstood upper and lower two the overlapping terminations of trailing wheel left and right sides intersection activity push rod (58), make these two push rods under the state of alignment can not after move, and front-wheel left and right sides intersection activity push rod (62) the push rod spacer (63) supporting because its outboard beam is equipped with it mutually, these two push rods can not be moved forward under the state of alignment, because rear, front-wheel left and right sides intersection activity push rod (58) (62) is upper and lower, all there is the linkage from top to bottom plate (57) being flexibly connected by push rod movable bolt (59) to be connected as a single entity, because of after this, front-wheel left and right sides intersection activity push rod (58) (62) interacts after horizontal alignment, can not after move and can not move forward, stably by wheelchair support to Breadth Maximum, when wheelchair, finish using and need to receive when folded, by retraction handles (51) rotation 45° angle, by frid top board (54) the driven rotary positioning groove plate (53) being fixedly connected with handle base plate (52), also rotate 45° angle, frid is vertical configuration, its afterbody is also because rotation displacement has been decontroled being the support of two overlapping terminations of the trailing wheel left and right sides intersection activity push rod (58) of horizontal alignment shape, and can only blocking front-wheel left and right sides intersection activity push rod (62) mutually, push rod spacer (63) can not move forward, after movable push rod, move unrestricted, so now pull back retraction handles (51), on handle drives, after lower linkage board (57) is synchronous, move, linkage board again by roof movement bolt (59) cause upper and lower overlapping after, front-wheel left and right sides intersection activity push rod (58) (62) is cross transposition backward, the other end of each movable push rod mounting groove movable bolt (61) and push rod mounting groove (60) separately by separately under active force pulls the trailing wheel raker beam (36) of both sides and the front-wheel support (28) of both sides to come closer, wheelchair is reached narrow the object of width, reuse before wheelchair, promote forward retraction handles (51) until front-wheel left and right side intersection activity push rod (62) is encountered the outboard beam push rod spacer (63) of dress and can not be again during to reach mutually with it mutually, afterwards, front-wheel left and right sides intersection activity push rod (58) (62) has been horizontal alignment, again by retraction handles (51) rotation 45° angle, make to rotate positioning groove plate (53) afterbody and withstand behind two upper and lower overlapping terminations of trailing wheel left and right sides intersection activity push rod (58), wheelchair recovers to use.
5. a kind of wheelchair that can stair activity according to claim 1, it is characterized in that: wheelchair both sides can inwardly fold, but softened when wheelchair parts are used is to be flexibly connected to Breadth Maximum, and wheelchair stair activity often occur that single wheel is first gone up or first under situation, cause the one-sided load-bearing of wheelchair, stability for reinforcement level intersection activity retraction rack composition (50), must design hard-caked sediment seat stacked to be received to meet the inhomogeneous needs of wheelchair both sides load-bearing, the design's square crossing sliding seat forms (64) and is achieved in that Wheelchair support before both sides (28) inner side is provided with seat front mounting plate (65), installing plate (66) after seat being installed in both sides trailing wheel raker beam (36), before the seat of both sides, between rear installing plate (65) (66), be set with chair mounted axle (67), it is several right that between the chair mounted axle of both sides, the seat right side bearing strip (69) of having hung seat left side bearing strip (68) and having matched is worn in symmetrical activity, every pair of left side, a left side for right side bearing strip (68) (69), termination, right side all by installing hole movable set on a left side, in right-side seat installation shaft (67), the other end of bearing strip is all through on seat active plate (71) and is flexibly connected by seat bearing strip movable axis (70) symmetry, when wheelchair is used, seat is left, right side bearing strip (68) (69) is left behind equal level when relative, be connected edges of boards lids (72) with the seat of seat active plate (71) one and blocked a seat left side, the upper side slat body of right side bearing strip (68) (69), under the support of seat bearing strip movable axis (70), the symmetrical seat of installing is left, right side bearing strip (68) (69) can not continue to sink, square crossing sliding seat forms (64) therefore can seat people be used, and rider's weight has been pushed down a seat left side, right side bearing strip (68) (69) makes it keep level, further the auxiliary level intersection activity retraction rack composition (50) of having consolidated struts its both sides the stability of Breadth Maximum when wheelchair is used, when rider's wheelchair that gets off is finished using, when need the inside receipts in wheelchair both sides be folded by level intersection activity retraction rack composition (50), every a pair of seat left and right side bearing strip (68) (69) is all under the active force shrinking, left and right sides chair mounted axle (67) be take as center of circle rotation in one end, the other end utilizes seat bearing strip movable axis (70) upwards to rotate in the upper square crossing of seat active plate (71) mutually, completes square crossing sliding seat and forms the upwards folding of (64), seat cushion (73) with backrest cushion (74) one is housed on square crossing sliding seat composition (64).
6. a kind of wheelchair that can stair activity according to claim 1, it is characterized in that: the square crossing step of wheelchair forms (75) and also can square crossing draw in, and can further receive backward folded: the step motion bar (76) of both sides is movably arranged on the inner side wheel shaft (20) of front-wheel (14) by installing hole, acutangulate with step motion bar (76) shape is connecting rod in step (77), and the step connecting rod of support (78) that connection motion bar and upper connecting rod angle form is arranged on the back side of this two rod ends head, like this when square crossing step composition (75) puts down preparation step, pull lower step motion bar (76), motion bar drives in step connecting rod (77) and step connecting rod of support (78) to take wheel shaft (20) and rotates forward as the center of circle, when forwarding the angle needing to, the step connecting rod of support (78) that is arranged on connecting rod (77) back side, termination in step motion bar (76) and step has just in time withstood the medial branch fagging of front-wheel support (28), and with this, forms square crossing step and form (75) and bear step gravity and the stress point that do not drop, when forming without use step, mention that square crossing step forms (75) and to pusher, it is the center of circle that step motion bar (76) still be take wheel shaft (20), and what drive that whole square crossing step forms that (75) plough under that the square crossing sliding seat of wheelchair forms (64) is received folded below backward, square crossing step step form (75) except can receive backward folded, the square crossing that makes progress of its both sides is received folded principle and structure square crossing sliding seat basic and wheelchair to form (64) consistent: square crossing step forms the angle front end of connecting rod (77) formation in the step motion bar (76) of (75) both sides and step, installing plate (80) after step axle front mounting plate (79) and step axle is all housed, before, step installation shaft (81) is all housed between rear installing plate, between both sides step installation shaft (81) symmetrical activity step left side bearing strip (82) has been installed and step right side bearing strip (83) several right, a left side for every pair of bearing strip, termination, right side is all worn and is hung in left and right sides step installation shaft (81) by installing hole activity, step is left, another termination of right side bearing strip (82) (83) is through the upper flexible connection of step active plate (85) by step bearing strip movable axis (84) correspondence, when in using, the equal level of step left and right side bearing strip (82) (83) is relative, be connected edges of boards lids (86) with the step of step active plate (85) one and blocked the upper side slat body of step left and right side bearing strip (82) (83), under the support of step bearing strip movable axis (84), the symmetrical step left and right side bearing strip (82) (83) of installing can not continue to sink, square crossing step forms (75) therefore can load-bearing step, and the gravity of step has been pushed down step left and right side bearing strip (82) (83), make it keep level, when wheelchair is finished using, when need the inside receipts in wheelchair both sides be folded by level intersection activity retraction rack composition (50), every a pair of step left and right side bearing strip (82) (83) all under the active force shrinking one end take left and right sides step installation shaft (81) for center of circle rotation, the other end utilizes step bearing strip movable axis (84) upwards to rotate in the upper square crossing of step active plate (85) mutually, completes square crossing step and forms the upwards folding of (75).