CN2464304Y

CN2464304Y - Wheel chair capable of going up/down stairs

Info

Publication number: CN2464304Y
Application number: CN 01205624
Authority: CN
Inventors: 师建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-19
Filing date: 2001-02-19
Publication date: 2001-12-12
Anticipated expiration: 2011-02-19

Abstract

The utility model relates to a wheel chair which is used for disabled people, and concretely, is a wheel chair which is provided with a special mechanism and can go up and down stairs under the action of external force. A bearing wheel is connected with a rack of the wheel chair by a clamp head which can be loaded and unloaded quickly; the rack of the wheel chair is provided with two groups of auxiliary supporting devices with supporting racks and supporters which are driven by a rack and a gear wheel and an auxiliary supporting device which is positioned by a pin of a guide bar and a positioning notch of a guide pipe, and is provided with wheels. When the disabled people go up and down stairs, the two groups of auxiliary supporting devices with the supporting racks and the supporters support the wheel chair and the loading alternately.

Description

But a kind of wheelchair of stair activity

This utility model relates to the wheelchair that uses for a kind of people with disability, is a kind of special entity that has more exactly, can pedal the wheelchair of going upstairs under external force.

The many wheelchairs that can climb the building are disclosed in the prior art.A kind of manual stair-climbing wheel chair of polypody was once disclosed as Chinese utility model patent 93209301.9.This patent is except that complex structure, cost height being arranged, use useless power, taking the deficiency such as discomfort, wheelchair length is long also to have a strong impact on its use, because present stage, the stair in ordinary residence building were all narrower, its width can not adapt to this patent wheel chair sport, and because the restriction of length can't be turned it at all in stair-corridor.As the improvement to this technology, designer of the present utility model had once designed a kind of new stair-climbing wheel chair, promptly Chinese utility model patent 99218014.7 disclosed " but wheelchair of stair activity ".This patent is the seat with wheelchair, backrest is arranged on first and second auxiliary support apparatus, on second auxiliary support apparatus, be fixed with the 3rd auxiliary support apparatus and the pivoted arm of band support wheel with hinge, the axle of the wheel of band rotating turret schedules on the pivoted arm with hinges fixing, described first, at least be provided with two groups of supplemental support wheels in second auxiliary support apparatus, the center of gravity of wheelchair and load is positioned at first, in wantonly two groups of support wheels of second auxiliary support apparatus, on wheelchair, also be provided with and drive the driving device that two auxiliary support apparatus move along short transverse respectively, in the stair activity operation, arbitrary cover auxiliary support apparatus is when short transverse is moved, and another set of auxiliary support apparatus is carrying the all-mass of wheelchair.See in from disclosed file, going back in addition that the driving device that this patent moves up and down seat is to adopt pulley and soft rope, and all bracing or strutting arrangements wherein comprise that auxiliary support apparatus has all used wheel.Because the restriction of structure itself, particularly each bracing or strutting arrangement is wheel, make this patent can not effectively avoid wheelchair from sliding automatically when stair activity meets accident upstairs, so the safety of its use is poor; In addition as the main BOGEY WHEEL of wheelchair, though promptly the bull wheel of being sayed in the patent is located at position upwards by rotating shaft when stair activity, but still the length that has prolonged wheelchair makes the motion of wheelchair at stair, and particularly motion is restricted at the stair turning; The elevating mechanism that pulley that this patent adopts and soft rope constitute was both unbecoming, also not really reliable.

The purpose of this utility model provides a kind of prior art deficiency that overcomes, and can turn in comparatively narrow stair road, can prevent wheelchair under the unexpected situation from the stair voluntarily under the landing, the wheelchair of safer stair activity reliably.

Feature of the present utility model is: is connected with the dop that can load and unload fast between its BOGEY WHEEL and wheelchair frame, the dop that can load and unload fast described here be meant existing sports bicycle take turns with between centers can load and unload fast be connected dop.In the three cover auxiliary support apparatus that on wheelchair frame, are provided with, first auxiliary support apparatus is by the tooth bar of vertical fixing on wheelchair frame, fixed supporter constitutes on the tooth bar overhanging end, wherein the area of fixed supporter should be enough big on the tooth bar overhanging end, can guarantee to make wheelchair and on load be positioned within the area of this supporter; Second auxiliary support apparatus is by the gear being located in the rigidity casing and being meshed with tooth bar, be fixed in described rigidity casing and respectively carry two supports of two rollers and which is provided with two guide grooves, and the shaped as frame structure that this guide groove matches with aforementioned roller, and the vertical support frame that is fixed on edge of shaped as frame structure constitutes with the inclination bracing frame that has one section horizontal shore on being fixed in relative edge, following condition should be satisfied in the angle of inclination of its medium dip bracing frame, when second auxiliary support apparatus is in any Support Position wheelchair and on the center of gravity of load all be positioned within vertical support frame and the inclination bracing frame; The 3rd auxiliary support apparatus by: be fixed in two conduits on the wheelchair frame and the guide rod that is slidingly matched in conduit constitutes, wherein the upper end of guide rod and a conduit are provided with the limitation locking mechanism that cooperatively interacts, and are fixed with supplemental support in the lower end of guide rod and take turns.When this utility model uses, when transmitting gear, can drive the relative tooth bar of second auxiliary support apparatus and move up and down, and shaped as frame structure guide groove thereon makes it do transverse movement by relative tooth bar with cooperation between roller.

In this utility model, the fixed position of tooth bar should be located at 1/2 to 1/4 place of wheelchair near the chair back.

On the tooth bar in this utility model, at least be fixed with two guide rails that are oppositely arranged along its face that vertically and not has tooth, in rigidity casing of the present utility model, be provided with the guide wheel that matches with described guide rail, between rigidity casing and tooth bar, produce constraint by the interaction between guide wheel and guide rail, can guarantee that the rigidity casing moves up and down along tooth bar, can avoid simultaneously producing horizontal position between casing and tooth bar or reversing.

In this utility model, between two relative edges, also answer at least one guide rail of vertical fixing, on described support, can respectively be fixed with two horizontal location wheels, and these two pairs of horizontal location wheels all are stuck in described guide rail both sides.

Guide rod in this utility model and locking mechanism between conduit are to be located at the evagination bayonet lock of guide rod upper end and to match with bayonet lock, are positioned at set locating notch on the conduit.

Also be respectively arranged with spring reset mechanism on the edge of the shaped as frame structure in this utility model.

The utlity model has following advantage:

1, BOGEY WHEEL of the present utility model adopted the sports bicycle wheel with spool quick loading and unloading be connected dop, before going upstairs, this utility model can unload BOGEY WHEEL rapidly, when needs use big BOGEY WHEEL, can be installed on the wheelchair easily rapidly again, this structure can reduce the length of wheelchair simultaneously, Convenient wheelchair is turned in the stair corner, the many negative effects that can avoid big BOGEY WHEEL to produce when stair activity again;

2, elevating drive mechanism of the present utility model has adopted rack-and-pinion and corresponding mechanism, both guaranteed that the rigidity casing moved up and down along tooth bar, avoided again producing horizontal displacement between casing and tooth bar or reversing, make its reliability during operation be better than soft rope pulley mechanism of the prior art, safety and stability during use strengthen greatly;

3, because auxiliary support apparatus of the present utility model has adopted two groups of bracing frames that alternately land, to replace supplemental support wheel of the prior art, in use these bracing frames can not resemble and rotate the support wheel of the prior art, so just avoided the phenomenon that wheelchair moves downward automatically when the wheelchair stair activity meets accident fully, make wheelchair safer when last going downstairs, in addition, since in this utility model two groups of auxiliary support apparatus be provided with all can make wheelchair and on the center of gravity of load be in stable position, so its safety and riding comfort are fabulous;

4, to compare prior art more simple for structure of the present utility model.

Description of drawings

Fig. 1 is a structural representation of the present utility model.Fig. 2 is the sketch map of Figure 1A-A position.Fig. 3 is the sketch map of utility model when pedaling stair.

Below in conjunction with description of drawings:

See Fig. 1, on wheelchair frame 3, be fixed with seat 2, BOGEY WHEEL 1 and directive wheel 8.But on BOGEY WHEEL 1 wherein and the wheelchair frame 3 set axle with Fast Installation set on the existing sports bicycle and unload connect the dop connection.Vertical fixing has tooth bar 9 below the seat of installing on wheelchair frame 32, and the fixed position of tooth bar 9 on wheelchair should be positioned at 1/2 to 1/4 place near the chair back.At tooth bar 9 overhanging ends, just be fixed with supporter 23, and constitute a cover auxiliary support apparatus of the present utility model by tooth bar 9 and following set supporter 23 thereof in the lower end of tooth bar 9.Supporter 23 in this utility model can be plate shaped, or it is rectangular box-like, or be I-shaped, and the Area of bearing of supporter 23 should be enough big, make wheelchair and on the load center of gravity all be within the Area of bearing, with the stable support wheelchair and on load, and unlikely generation turning over phenomenon.On wheelchair frame 3, be fixed with two conduits 4 and 26, in conduit 4 and 26, be sliding combined with guide rod 5, be fixed with supplemental support wheel 27 in the lower end of guide rod 5, constitute another set of auxiliary support apparatus thus.Be provided with an outwardly directed bayonet lock (annotating: do not express overhanging bayonet lock in the drawings) in the upper end of guide rod 5, and on conduit 4, be provided with up and down two locating notches, the guide rod bayonet lock upstairs the time be with conduit 4 on set following locating notch complement each other to form the limitation locking mechanism of guide rod; And when normal the use, guide rod 5 is pulled out and is utilized the last locating notch of establishing on the conduit that bayonet lock is blocked to form and fixes, and the support wheels 27 under it are not contacted with ground.Be also shown in by Fig. 1 and be combined with casing 10 on tooth bar 9, shaped as frame structure 28 has matched with casing 10.Be provided with the gear 22 that matches with tooth bar 9 in casing 10, referring to Fig. 2, the axle 21 of gear 22 is provided with spline, to match with the crank (not expressing the peripheral hardware crank among the figure) of peripheral hardware.For guaranteeing cooperating of casing 10 and 9 of tooth bars, can make simultaneously casing 10 relative tooth bar motions again, two anodontia faces that incline are fixed with the guide rail 29a and the 29b of two positioned opposite on tooth bar 9, simultaneously in casing 10 with tooth bar on guide rail 29 touching positions and the back side of tooth bar 9 respectively be provided with the roller 17 (being directly to use bearing in the present embodiment) that matches as roller, this structure both can have been avoided producing horizontal position between casing and tooth bar or reversing, guaranteed also that simultaneously rigid box physical ability freedom moves up and down along tooth bar, has stability preferably when wheelchair is moved up and down.At casing 10 external fixation two support 11a and 11b are arranged, all be fixed with roller 15 in the outer end of each support.Roller 15 matches with fixed guide groove 12 on shaped as frame structure 28, and guide groove 12 the simplest structures can be the structures of ∏ shape.As can be seen from Figure 2 because the effect of 12 of roller 15 and guide grooves, make shaped as frame structure 28 can with the perpendicular plane of tooth bar 9 in transverse movement; Simultaneously since in the casing 10 with the fixed structure of 9 of tooth bars and gear 22 with make the whole shaped as frame structure 28 also can vertically moving up and down cooperating of 9 of tooth bars along tooth bar 9.On the limit of shaped as frame structure 28 18a (being the left side of guide groove 12 among Fig. 1), be fixed with downward vertical support frame 24, and fixedly have the inclination bracing frame 25 of one section horizontal shore downwards at limit 18b place, in general, the length of bracing frame 25 is greater than bracing frame 24, difference in height between the two should equal the height of one deck step substantially, the inclination angle of being located at the downward inclination bracing frame 25 in 18b place, limit in addition should be enough big, with guarantee when bracing frame 24 and 25 when the extreme position that is in Fig. 3 supports, wheelchair and the center of gravity that goes up load thereof are still between 24 and 25.Constitute another cover auxiliary support apparatus of the present utility model by tooth bar, gear and mount structure 28 etc.In embodiment of the present utility model, nearly 1/2 place near the chair back is located in the fixed position of tooth bar 9, and the center of supporting wheels 27 also is about same position, can guarantee like this wheelchair and on the center of gravity of load always be within the wheelchair Support Position, avoid taking place forward or after the danger toppled over.

For prevent promote frame 28 make its do with the perpendicular plane of tooth bar in motion the time, be out of shape the resistance of motion that produces owing to inclination thrust generation frame, also vertical fixing has guide rail 14 between two opposite side 18a of structural frames 28 and 18b, on support 11a and 11b, respectively be fixed with two horizontal location wheels 16, and two pairs of horizontal location wheels 16 respectively are stuck in guide rail 14 both sides, so just can effectively overcome the additional drag that produces because of incline direction promotion framework 28.

From Fig. 2, be also shown in, on two opposite side 18a of shaped as frame structure 28 and 18b, be separately installed with spring reverse motion 13.When frame 28 moves to when contacting with casing 10, the effect by means of device 13 can make it reset fast.

For making this utility model use more convenient, on backrest behind the wheelchair, can be provided for placing the axle (this axle does not clearly show in the drawings) of support wheel 1, referring to Fig. 3 temporarily.

Operation when this utility model is pedaled stair is as follows:

When this utility model is pushed into the stair place, the chair back that makes wheelchair earlier is near stair, push guide rod 5 support wheel 27 of its lower end is contacted with ground, simultaneously positioning clamping pin set on the guide rod 5 is stuck in the following locating notch set on the conduit 4, support wheel 27 just is fixed in ground location like this.Utilize fast quick-detach dop to take off support wheel 1, and support wheel 1 is positioned on the set axle of wheelchair back temporarily.Crank with peripheral hardware is enclosed within on the gear shaft 21, and the interior spline of the spline of axle on 21 and peripheral hardware crank handle sleeve barrel is meshed.Rotating behind the crank tooth bar 9 can move downward and supporter set on the tooth bar 9 23 is stablized with ground contact, after this being rotated further crank again can upwards lift mount structure 28, make the surface of arriving the last layer stairway step on the vertical support frame 24 on the mount structure 28, the Support Position of tilt stand 25 then is in the ground floor stairway step, be on the ground, promote mount structure 28 this moment, make its transverse movement, promptly to the motion of the left side of Fig. 1, left frame 18a up to mount structure contacts with second layer step, at this moment vertical support frame 24 contacts with second layer stairway step, supports and also produce reliably between inclination bracing frame 25 and ground.Oppositely shake the peripheral hardware crank again, gear 22 is acted on the tooth bar 19, and the load on whole wheelchair and the seat is raised up to the height of second layer stairway step by tooth bar, form state as shown in Figure 3, promote wheelchair frame 3 again, make supplemental support wheels 27 " pedal " second layer step, referring to Fig. 3.So repeating to make this utility model to pursue rank pedals and goes upstairs.Can make wheelchair pursue rank when moving more than the inverted running gets off from stair.

By above narration as can be known, when wheelchair frame 3 grades were lifted, whole wheelchair was not subjected to the load of horizontal direction, and casing 10 can contact with the spring reset mechanism 20 on the right simultaneously, and the effect by resetting-mechanism at this moment can promote wheelchair left very like a cork.

Be also shown in addition, in the process that wheelchair is gone upstairs, or by being fixed in vertical and inclination bracing frame Stabilization on the shaped as frame structure 28 on a certain step, or supporter 23 Stabilization that are fixed in the tooth bar lower end are on a certain step, problem to lower slider can not take place voluntarily, therefore the utlity model has higher safety.

Claims

1, but a kind of wheelchair of stair activity, the seat (2) that comprises wheelchair frame (3) and be fixed thereon, BOGEY WHEEL (1), directive wheel (8), and be located at three on the wheelchair and overlap auxiliary support apparatus, it is characterized in that being connected with the dop that can load and unload fast between BOGEY WHEEL (1) and wheelchair frame (3), in the three cover auxiliary support apparatus that on wheelchair frame, are provided with, by: the tooth bar (9) of vertical fixing on wheelchair frame, fixed supporter (23) constitutes a cover auxiliary support apparatus on tooth bar (9) overhanging end, by: be located at rigidity casing (10) and gear (22) interior and that be meshed with tooth bar (9) thereof, be fixed in described rigidity casing (10) and respectively carry two supports (11a) of two rollers (15) and (11b), the guide groove (12) that matches with roller (15), by guide groove (12) and frame (18a) and the shaped as frame structure (28) that (18b) constitutes, and be fixed on the vertical support frame (24) on limit (18a) of shaped as frame structure (28) and the inclination bracing frame (25) that has one section horizontal shore that is fixed in the limit (18b) of mount structure (28) constitutes a cover auxiliary support apparatus, by: be fixed in two conduits (4) and (26) on the wheelchair frame (3), guide rod (5) that is slidingly matched in conduit (4) and (26) and the supplemental support wheel (27) that is fixed in guide rod (5) lower end constitute another set of auxiliary support apparatus, wherein the upper end of guide rod (5) and conduit (4) are provided with the limitation locking mechanism that cooperatively interacts, can drive the relative tooth bar of second auxiliary support apparatus (9) when transmitting gear (22) and move up and down, and shaped as frame structure (28) guide groove (12) thereon makes it do transverse movement by relative tooth bar (9) with cooperation between roller (15).

But 2, the wheelchair of a kind of stair activity according to claim 1 is characterized in that the fixed position of tooth bar (9) on wheelchair should be positioned at 1/2 to 1/4 place near the chair back.

But 3, the wheelchair of a kind of stair activity according to claim 2, it is characterized in that on the tooth bar (9) in this utility model, at least be fixedly installed on two guide rails (29) along its vertical its face that does not have tooth, in rigidity casing of the present utility model (10), be provided with the guide wheel (17) that matches with described guide rail (29).

But 4, the wheelchair of a kind of stair activity according to claim 3, it is characterized in that on the limit of shaped as frame structure (28) (18a) and go back vertical fixing (18b) that guide rail (14) is arranged, respectively be fixed with two horizontal location wheels (16) at support (11a) with (11b), and two pairs of horizontal location wheels (16) all are stuck in guide rail (14) both sides.

But, it is characterized in that the locking mechanism between guide rod and conduit is a bayonet lock and the locating notch of being located on the conduit (4) up and down of being located at (5) guide rod upper end 5, according to the wheelchair of described any stair activity of claim 1 to 4.

But 6, the wheelchair of a kind of stair activity according to claim 5 is characterized in that being respectively arranged with spring reset mechanism (13) on the limit of shaped as frame structure (28) (18a) with (18b).