CN101204343A - Manual wheelchair system capable of going up-down stairs - Google Patents

Abstract

The invention discloses an up-and-down stair system for a manual wheelchair, which comprises a wheelchair body, a frame and wheels. An up-and-down stair device is arranged on each side of the frame; the two up-and-down stair devices are transmitted through the connection of the transmission shaft. The wheelchair always keeps a horizontal status when going up and down the stairs, and the trailing wheel always touches the land, but the front wheel is in air. The motion trail is centered on the tops of the steps of the staircase and reaches the vertex of the circular arc which is drawn with the radius of the trailing wheel as the radius; and motion of a sidestep is completed when the trailing wheel of a wheelchair touches the vertical surface of the previous step length of the straight line of which is determined by the width of the steps;. The invention has the advantages of simple operation, easy use, and that the wheelchair taker can go up and down the stairs without helping.

Description

A kind of manual wheelchair system capable of going up-down stairs

One, technical field

The invention belongs to the wheelchair technical field, especially relate to a kind of manual wheelchair system capable of going up-down stairs.

Two, background technology

The present common Wheel-chair of taking turns; only suitable level walking; the problem of stair activity step also can't realize settling a dispute by the parties concerned themselves; bring inconvenience for home-bound patient and old wheelchair occupant's daily routines; need many people to lift wheel Wheel-chair stair activity when running into stairway step, thereby bring inconvenience for the family activity of going out of user.

Three, summary of the invention

The objective of the invention is to improve the deficiency of prior art and provide that a kind of stranger of need not helps, occupant stair activity, manual wheelchair system capable of going up-down stairs simple to operate, easy to use voluntarily.

The object of the present invention is achieved like this, a kind of manual wheelchair system capable of going up-down stairs, be by the wheelchair body, vehicle frame and wheel are formed, the both sides that are characterized in vehicle frame respectively are provided with a cover stair activity device, two cover stair activity devices connect transmission by power transmission shaft, power transmission shaft is provided with two-way ratchet, ratchet is with length-adjustable drive rod outward, the clamping plate of the inside and outside both sides of running gear constitute a pair, fixedly connected with vehicle frame in the outside of clamping plate, the inboard of two clamping plate is provided with the operation slideway of arch support lower limb, the arch support lower limb can move along slideway in clamping plate, be fixed with the rolling bearing of power transmission shaft on two clamping plate, wherein the rolling bearing on the clamping plate of the outside is the single direction ratchet swivel bearing; Driven wheel, commutation turriform gear, the commutation idle wheel, the limited roller axle is fixed between two clamping plate, the clutch of control friction driving wheel and wheel clutch is installed on the outside power transmission shaft of outside clamping plate, clutch handle connects solenoidoperated cluthes by pull bar, be fixed with the identical duplex main drive gear of the number of teeth on the inside power transmission shaft of two clamping plate, the gear of main drive gear both sides respectively with the commutating tooth wheel shaft on the gear wheel of two commutation turriform gears mesh all the time, the gear wheel of commutation turriform gear can or be thrown off with the driven wheel engagement, the pinion of two commutation turriform gears respectively with the commutation axle of carrier pulley on the engagement of two commutation idle wheels or throw off, the commutation idle wheel meshes with driven wheel all the time, tooth bar on driven wheel and the arch support lower limb remains engagement, be provided with adjustable telescopic leg in the arch support lower limb, the tail end of telescopic leg is fixed with two lacing wires, article two, an end of lacing wire is inserted by the connector at the tangent position place of going up both sides the wire spool garden week of adjusting the foot handle respectively, steel wire in the lacing wire is intertwined and connected on wire spool, article two, the other end of lacing wire is then inserted by the rear portion of arch support lower limb, article one, the steel wire in the lacing wire is directly connected on the locking key of adjusting the foot afterbody, and the steel wire in another lacing wire is then walked around from the forward pulley of arch support lower limb and is connected on the locking key of adjusting the foot afterbody.

Compared with the prior art the present invention has following distinguishing feature and good effect: wheelchair remains level during stair activity step of the present invention, the trailing wheel of wheelchair lands all the time, and front-wheel soars, its movement locus is that the upper edge with stairway step is the center of circle 0, radius with trailing wheel is after radius is drawn the summit of arc arrival circular arc, after touching the vertical plane of upper level step by the length of the width of stairway step decision straight line portion up to the wheelchair trailing wheel, finish the motion of single order step, its arc radius of front portion that the strong point of the arc Retractive leg of the present invention's design is positioned at wheelchair is identical with the radius of trailing wheel, and can be according to the height of the height adjustment feet of step, like this when arc supporting leg when to be the center of circle with the trailing wheel radius be the radius motion with 0 ', thereby remain level with the identical wheelchair that guaranteed of movement locus of trailing wheel, have simple to operate, easy to use, need not the stranger and help the characteristics of stair activity voluntarily.

Four, description of drawings

Below in conjunction with drawings and Examples the present invention is described in further detail.

Fig. 1 is a kind of structural representation of the present invention.

Fig. 2 looks up structural representation for Fig. 1 of the present invention.

Five, specific embodiments

Embodiment 1, a kind of manual wheelchair system capable of going up-down stairs, with reference to Fig. 1, Fig. 2, be that vehicle frame 17 is provided with wheelchair body 16 and wheel 18 is formed, the both sides of vehicle frame 17 respectively are provided with a cover running gear, two cover running gears connect transmission by power transmission shaft 13, power transmission shaft 13 is provided with two-way ratchet 12, be with length-adjustable drive rod 19 outside the ratchet 12, running gear is that the clamping plate 4 of inside and outside both sides constitute a pair, fixedly connected with vehicle frame 17 in the outside of the clamping plate 4 in the outside, the inboard of two clamping plate 4 is provided with the operation slideway of arch support lower limb 20, arch support lower limb 20 can move along slideway in clamping plate 4, is fixed with the rolling bearing 14 of power transmission shaft 13 on two clamping plate 4, and wherein the rolling bearing 14 on the clamping plate 4 of the outside is the single direction ratchet swivel bearing; Driven wheel 8, commutation turriform gear 7, commutation idle wheel 9,10 of limited rollers are fixed on 4 on two clamping plate, the clutch of control friction driving wheel 15 is installed on the outside power transmission shaft 13 of outside bottom plate 4, pulls the clutch of clutch handle 2 by pull bar 3 control friction driving rollers; The centre of power transmission shaft 13 is equipped with two-way ratchet 12, ratchet is with length-adjustable drive rod 19 outward, pull drive rod 19 and drive power transmission shaft 13 by ratchet and do forward and reverse rotation, the identical duplex main drive gear 6 of the number of teeth is housed on the inside power transmission shaft 13 of the both sides bottom plate 4 of power transmission shaft 13 and fixedlys connected with power transmission shaft 13; The gear of main drive gear 6 both sides respectively with the commutating tooth wheel shaft that is installed on the bottom plate 4 on the gear wheel of two commutation turriform gears 7 mesh all the time; The gear wheel of commutation turriform gear 7 can mesh with the driven wheel 8 on the driving shaft that is installed on the bottom plate 4, also can throw off, the pinion of two commutation turriform gears 7 respectively with the commutation axle of carrier pulley that is installed on the bottom plate 4 on two commutation idle wheels 9 engagements, also can throw off simultaneously, when the gear wheel of commutation turriform gear 7 meshes with driven wheel 8, pinion necessarily is in disengaged condition when the pinion of commutation turriform gear 7 meshes with commutation idle wheel 9, gear wheel necessarily is in and driven wheel 8 disengaged condition, the gear wheel and the driven wheel 8 of commutation turriform gear 7 are in disengaged condition during neutral gear position, and pinion is in disengaged condition with commutation idle wheel 9; Commutation idle wheel 9 meshes with driven wheel 8 all the time; Tooth bar on driven wheel 8 and the arch support lower limb 20 remains engagement, thereby arch support lower limb 20 moves at the drive lower edge of tooth bar slideway and drives wheelchair and do arc and move when driven wheel 8 forward and reverse rotations, when wheelchair is gone up the upper level step by the level land, height distance between arch support lower limb 20 and the step just need be adjusted according to the height of step by the adjustable telescopic leg 5 in the arch support lower limb 20, pull the adjustment foot handle 11 that is installed on the wheelchair frame front part sides and adjust the extension elongation of telescopic leg 5 by two lacing wires 1 on each supporting leg 20, article two, an end of lacing wire 1 is inserted by the connector at the tangent position place of going up both sides the wire spool garden week of adjusting foot handle 11 respectively, steel wire in the lacing wire 1 is intertwined and connected on wire spool, article two, the other end of lacing wire 1 is then inserted by the rear portion of arch support lower limb 20, article one, the steel wire in the lacing wire 1 is directly connected on the locking key of adjusting foot 5 afterbodys, steel wire in another lacing wire 1 is then walked around from arch support lower limb 20 forward pulleys and is connected on the locking key of adjusting foot 5 afterbodys, steel wire in pulling when adjusting foot handle 11 lacing wire 1 retracts, steel wire in another lacing wire 1 is sent, thereby drive is connected in the positive and negative both direction of locking key of adjusting foot 5 afterbodys and moves to drive and adjust stretching out and regaining of foot 5, it is motionless to adjust foot 5 pinnings when locking key is not mobile, and this constitutes a kind of structure of the present invention.

When using wheelchair up/down steps of the present invention, the wheelchair front and is stairway step dorsad when going upstairs step towards step when getting out of a predicament or an embarrassing situation.Wheelchair two trailing wheels are close to stairway step when going upstairs step, move down clutch operating handle 2 and make the trailing wheel friction pressing of left and right sides friction driving roller 15 and wheelchair, move telescopic adjustment foot handle 11, difference according to the height of stairway step locks the height of adjusting foot 20 voluntarily, thereby has guaranteed that wheelchair is in level all the time; Begin back and forth to move drive rod 19 then, thereby drive power transmission shaft 13 rotations by two-way ratchet 12 and drive main drive gear 6 rotations, by tumbler gear 7 commutation idle wheels 9 driven wheels 8 arch support lower limb 20 is moved reciprocatingly, friction driving roller 15 drives wheelchair trailing wheel 19 rolling rotation backward simultaneously, thereby makes the up/down steps of wheelchair one-level single order; When arch support lower limb 20 runs to the end, its commutation block promotes driving lever makes tumbler gear 7 be in the position of neutral, difference according to step width continues to move the operation that horizontal component is finished in drive rod 19 wheelchair trailing wheels rolling rotation, when the wheelchair trailing wheel touches the vertical plane of upper level step, the commutation driving lever of tumbler gear 7 promotes tumbler gear 7 commutations of arch support lower limb 20 simultaneously, main drive gear 6 and tumbler gear 7 like this, 9 engagements of commutation idle wheel, thereby driven wheel 8 engagements drive outwards motion of arch support lower limb 20, when its commutation block of arch support lower limb 20 operations one segment distance promotes tumbler gear 7 commutations that the tumbler gear driving lever promotes arch support lower limb 20, main drive gear 6 and tumbler gear 7, thereby driven wheel 8 engagements are inwardly moved arch support lower limb 20; When arch support lower limb 20 runs to the end, the commutation block promotes the commutation driving lever makes tumbler gear 7 be in neutral gear position, power transmission shaft 13 continues to drive friction driving wheel 15 and drives the rotation of wheelchair trailing wheel, and to till the vertical plane that touches the upper level step, thereby it is reciprocal to finish one action.

Claims (1)

1. manual wheelchair system capable of going up-down stairs, be by wheelchair body (16), vehicle frame (17) and wheel (18) are formed, the both sides that it is characterized in that vehicle frame (17) respectively are provided with a cover stair activity device, two cover stair activity devices connect transmission by power transmission shaft (13), power transmission shaft (13) is provided with two-way ratchet (12), the outer length-adjustable drive rod (19) that is with of ratchet (12), the clamping plate (4) of the inside and outside both sides of running gear constitute a pair, fixedly connected with vehicle frame (17) in the outside of clamping plate (4), the inboard of two clamping plate (4) is provided with the operation slideway of arch support lower limb (20), arch support lower limb (20) can move along slideway in clamping plate (4), be fixed with the rolling bearing (14) of power transmission shaft (13) on two clamping plate (4), wherein the rolling bearing (14) on the outside clamping plate (4) is the single direction ratchet swivel bearing; Driven wheel (8), commutation turriform gear (7), commutation idle wheel (9), limited roller (10) axle is fixed between two clamping plate (4), the clutch of control friction driving wheel (15) and wheel (18) clutch is installed on the outside power transmission shaft (13) of outside clamping plate (4), clutch handle (2) connects solenoidoperated cluthes by pull bar (3), be fixed with the identical duplex main drive gear (6) of the number of teeth on the inside power transmission shaft (13) of two clamping plate (4), the gear of main drive gear (6) both sides respectively with tumbler gear (7) axle on two the commutation turriform gears (7) gear wheel mesh all the time, the gear wheel of commutation turriform gear (7) can and driven wheel (8) engagement or throw off, the pinion of two commutation turriform gears (7) respectively with commutation idle wheel (9) axle on two commutation idle wheels (9) engagement or disengagement, commutation idle wheel (9) meshes with driven wheel (8) all the time, tooth bar on driven wheel (8) and the arch support lower limb (20) remains engagement, be provided with adjustable telescopic leg (5) in the arch support lower limb (20), the tail end of telescopic leg (5) is fixed with two lacing wires (1), article two, an end of lacing wire (1) is inserted by the connector at the tangent position place of going up both sides the wire spool garden week of adjusting foot handle (11) respectively, steel wire in the lacing wire (1) is intertwined and connected on wire spool, article two, the other end of lacing wire (1) is then inserted by the rear portion of arch support lower limb (20),, the steel wire in the lacing wire (1) is directly connected on the locking key of adjusting foot (5) afterbody, and the steel wire in another lacing wire (1) is then walked around from the forward pulley of arch support lower limb (20) and is connected on the locking key of adjusting foot (5) afterbody.

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