CN101869522A

CN101869522A - Step-striding device used on wheelchair

Info

Publication number: CN101869522A
Application number: CN200910138553A
Authority: CN
Inventors: 胡达广
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-27
Filing date: 2009-04-27
Publication date: 2010-10-27
Anticipated expiration: 2029-04-27
Also published as: CN101869522B

Abstract

Most of wheelchairs are only suitable for running on the flat ground, and the capability to stride over steps is low. By careful observation, one can see that the steps in public places and in front of business stores only have one step and the height thereof is about 10cm, and only by striding over the step, the range of movement of users can be greatly increased. The invention designs a set of mechanical arm device which can lift up the wheelchair and reach on the steps. The device is composed of a front and a rear mechanical arm, a jockey pulley and the like. The front and the rear mechanical arms are respectively installed with a group of jockey pulleys, wherein the front group is driven wheels and the rear group is driving wheels driven by a motor. When the wheelchair runs to the front edge of the steps, the user starts a power system to drive the front and rear mechanical arms to extend outwards and downwards, so as to lift up the wheelchair slowly and vertically; and the lifting amplitude can reach the height of the steps. As the front jockey pulleys tread on the step surface to lift up the wheelchair, at the time, if the driving motors of the rear group of jockey pulleys of the wheelchair are started, the wheelchair can be driven to run forwards to the steps.

Description

The step-striding device of used on wheelchair

One, technical field

Belong to the aids for the disabled classification

Two, background technology

Wheelchair has brought very big convenience, particularly electric wheelchair for patient and lower limb disability people.Yet blemish in an otherwise perfect thing is that the exhausted major part of electric wheelchair on the market only is adapted at travelling on the level land, and the ability of their leaping over obstacles is very low very low.Opening these electric wheelchairs when user and travelling and want to handle affairs on the street crossing in the city or during shopping, office, shop step in front of the door but unfeelingly their retaining in the outside.Slight step allows them hope and sighs.One time was wanted society to go up these places all to leave handicapped only by the state's laws regulation to use this to the wheelchair user be very difficult.The range of activity that enlarges the wheelchair user is only hoped the wheelchair that can cross over step.

Our urban environment is observed in carefulness, the periphery the shop in front of the door or the step overwhelming majority in other public places have only one-level and also the height and not really high, generally about 10cm.All breakthrough being multiplied can be arranged as long as stride across this one-level step wheelchair user's range of activity, capax negotii and quality of life.The use value of wheelchair self also improves greatly.Retrieve relevant patent, claim that patented invention clog-free or even the energy stair climbing is all a lot, but be exactly that almost neither one can the practicability commercialization.Have in these patents and use the having of crawler belt to use wheel of all kinds, can their design has their own characteristics each but why do not have practicability? trace it to its cause I feel they all ignore the ratio of height that any is exactly a wheelchair and front and rear wheel wheelbase too big and the ratio of shoulder height is too little in front of the door the front and rear wheel wheelbase of wheelchair and shop, mainly be that forward and backward wheelbase has been lacked very much and added user and take the height situation of seat and will become more abominable.Therefore wheelchair can influence use because of the too many crank safety that tilts is difficult to guarantee behind the first half climb steps of these " patent wheelchairs " or stair.If this situation can obtain improvement to a certain degree when increasing considerably the front and rear wheel wheelbase certainly, use but can lose its motility because the volume of wheelchair increases greatly even be difficult to like this, this is again worthless.I estimate that above-mentioned reason does not have at present to cross over the reason place of the wheelchair of step just in the city.

Three, summary of the invention

Can't this slight step really be crossed over? not of course not, as long as we change thinking and find ways of addressing this issue surely with regard to one.High these factors of the short relative altitude of the little front and rear wheel wheelbase of the upright projection area of wheelchair be doomed it will be steadily safely climb steps only walk this road of vertical lifting.In order to make the present invention of wheelchair vertical lifting design a cover, be used for a wheelchair vertical lift by the mechanical arm that power set drive.This robot arm device divides by forearm, postbrachium, preceding jockey pulley and back jockey pulley etc. and forms as shown in Figure 1, and these two mechanical arms drive synchronization action by different power set.One group of jockey pulley (about each one) respectively is installed at forearm with above the postbrachium, one group of jockey pulley of front (jockey pulley down together before being called for short) is a driven pulley, next one group of jockey pulley (be called for short back jockey pulley down with) be drivewheel by second driving device of motor-driven as wheelchair, they are to be collected in suitable local normally the travelling of wheelchair that at all do not influence at ordinary times.When wheelchair goes to the step forward position as shown in Figure 2, user starts power set and drives forward and backward arm and be contained in two groups of jockey pulleys above it and outwards stretch out downwards wheelchair vertical lift at leisure, the four wheels built on stilts of wheelchair and it is toward rising, and the height that the amplitude of its rising can reach step as shown in Figure 3.So because preceding jockey pulley is to step on step surface wheelchair is lifted the high wheel that it does not hinder wheelchair to overtake.At this moment start the drive motors of the one group of jockey pulley in wheelchair back, drive wheelchair and just in time reach step as shown in Figure 4 forward.So just reached steady purpose up the steps.Pack up two mechanical arms and jockey pulley, wheelchair just can freely travel on step.In the time will getting out of a predicament or an embarrassing situation, earlier wheelchair is reached the forward position of step, starting the corresponding driving device then puts down the forearm of wheelchair and preceding jockey pulley to greatest extent to previous crops, put to such an extent that be lower than the about 7-10cm in plane of step, postbrachium and back jockey pulley are also done an amount of Shen backward and are gone out as shown in Figure 5 simultaneously.At this moment when wheelchair continues to overtake, at first fall earthward be the wheelchair front preceding jockey pulley as shown in Figure 6, its drop also significantly reduced when the drop point of wheelchair front extended forward owing to send as an envoy in the downward forward in advance Shen of preceding jockey pulley, and wheelchair inclination at this moment is just in complete acceptable safety range like this.Again to overtake when the trailing wheel of wheelchair is crossed the forward position of step user allow wheelchair follow trailing wheel to fall at leisure by brake unit, after when wheelchair is fallen to a certain degree jockey pulley also fall on the step surface and the later half weight of bearing wheelchair as shown in Figure 6, start another driving device this moment and drive postbrachium and the upwards rise (relative wheelchair self) at leisure of back jockey pulley, therefore wheelchair also can fall to the ground as shown in Figure 7 reposefully.Packing up forward and backward arm and jockey pulley after wheelchair falls earthward just can recover normally to travel.

Four, description of drawings:

Fig. 1, front view

Fig. 2, wheelchair arrive step forward position sketch map

Fig. 3, forward and backward arm and jockey pulley are with wheelchair vertical lift sketch map

Fig. 4, wheelchair steadily reach the step sketch map

Fig. 5, when getting out of a predicament or an embarrassing situation before jockey pulley put down sketch map

The trailing wheel of Fig. 6, the wheelchair edge sketch map of walking to get out of a predicament or an embarrassing situation

Fig. 7, back jockey pulley rise wheelchair are put down sketch map

Forward and backward arm and the jockey pulley sketch map that resets is finished in Fig. 8, the action of getting out of a predicament or an embarrassing situation

Among the figure: follow arm before 1 front-wheel, 2, jockey pulleys, 4 forearms, 5 hydraulic jacks, 6 power arms, 7 seats, 8 car shells, 9 vehicle frames, 10 postbrachiums, 11 heels are followed the arm fulcrum before with arm, 12 trailing wheels, 13 back jockey pulleys, 14 back power arms, 15 back swing arm fulcrums, 16 power arm fulcrums, 17 before 3.

Five, the specific embodiment

So step-striding device the right and left of used on wheelchair of the present invention symmetry only just can illustrate its operation principle with side view.This device mainly by the jockey pulley of forward and backward each group every group two (about each), support two groups of jockey pulleys forearm 4 and postbrachium 10, power arm 6, follow arm 11 etc. and form.Preceding jockey pulley 3 and back jockey pulley 13 are installed in respectively on forearm 4, the postbrachium 10, and preceding jockey pulley 3 is driven pulleys, and back jockey pulley 13 is that drivewheel is equipped with drive motors on it.Forearm 4 with before follow that arm 2 is hinged to be promoted by oil cylinder 5.Postbrachium 10 and power arm 6, heel are hinged with arm 11, back power arm 14.Three independently power set under the control of circuit, drive oil cylinder 5, power arm 6 and back power arm 14 respectively and carry out separately task.When the wheelchair that apparatus of the present invention are housed sails to the step forward position as shown in Figure 2, user start-up control circuit control power set drive hydraulic jack 5 promote forward forearm 4, preceding jockey pulley 3 and before follow arm 2, follow before making and follow arm fulcrum 17 swing counterclockwise before arm 2 centers on, preceding follow arm 2 swing to place restrictions on after forearm 4, preceding jockey pulley 3 step under the promotion of hydraulic jack 5 that the first half wheelchair lifts on step.Power arm 6 is swung around power arm fulcrum 16 counter-clockwise direction under the driving of power set simultaneously, along with cooperating heel again, the swing of the counter-clockwise direction of power arm 6 also stretches out downwards backward at leisure, just the latter half of built on stilts that also lifts of wheelchair with the synchronous swing postbrachium 10 and the back jockey pulley 13 of arm 11.Dynamical system stops as shown in Figure 3 under the control of control circuit automatically when the increasing degree of wheelchair reaches shoulder height.So because preceding jockey pulley is that jockey pulley does not hinder wheelchair to advance before stepping on the step plane this moment that wheelchair is lifted, back jockey pulley 13 does not equally at this moment hinder it to march forward backmost at wheelchair at all.This moment, user promoted wheelchair forward as long as the drive motors driving back jockey pulley 13 of startup back jockey pulley 13 clockwise rotates, and wheelchair reaches step as shown in Figure 4 like this reposefully.Wheelchair just can be free movable on step after packing up two groups of jockey pulleys.

When ending activity will be got out of a predicament or an embarrassing situation wheelchair capable to the step forward position stop open control circuit control power set drive hydraulic jack 5 promote forward forearm 4, preceding jockey pulley 3 and before follow arm 2, follow before making and follow arm fulcrum 17 swing counterclockwise before arm 2 centers on, before follow arm 2 swing to place restrictions on after forearm 4, preceding jockey pulley 3 continue forward under the promotion of hydraulic jack 5 and move downward the lower limit of maximum after stop, jockey pulley 3 has been parked on the position that is lower than the about 7-10cm of step surface before this moment.At this moment control circuit drives the swing of power arm 6 counter-clockwise direction, postbrachium 10 and the suitable backward Shen of back jockey pulley 13 is gone out a bit as shown in Figure 5 by power set again.Wheelchair begins to advance forward, and what fall earthward earlier is preceding jockey pulley 3, so since the amplitude of the actual whereabouts that falls in advance its sixth of the twelve Earthly Branches this moment not during Datong District because it is to stretch out forward, improve as shown in Figure 6 greatly so be equivalent to the very little safety of gradient that the strong point of wheelchair extends wheelchair this moment forward.Further to moving ahead, trailing wheel has arrived the forward position of step to wheelchair, and at this moment user falls the trailing wheel of wheelchair by brake unit at leisure, when trailing wheel drops to a certain degree after jockey pulley 13 begin to touch step surface and bear most weight of wheelchair.Control circuit drives back power arm 13 around back power arm fulcrum 15 clockwise directions swing by power set, makes postbrachium 10 and back jockey pulley 13 to rising (relative wheelchair self) by heel with arm 11 again.Wheelchair is just along with the swing of back power arm 13 is fallen on the ground as shown in Figure 7 at leisure smooth decreasing like this.The trailing wheel of wheelchair falls earthward, and the back user is packed up preceding jockey pulley 3, trailing wheel 13 chairs just can normally travel.

Claims

1. the step-striding device of a used on wheelchair belongs to the aids for the disabled classification.This device mainly by preceding jockey pulley (3), support before jockey pulley forearm (4), with forearm (4) hinged before follow arm (2); Back jockey pulley (13), support the postbrachium (10) of back jockey pulley, respectively with the hinged heel of postbrachium (10) with arm (11), power arm (6), back power arm (14) with carry out the compositions such as power set, control circuit of different task respectively.Preceding jockey pulley (3) is a driven pulley, and back jockey pulley (13) is that drivewheel is equipped with drive motors.

The step-striding device of used on wheelchair according to claim 1 be characterised in that its preceding jockey pulley (3) and support before the forearm (4) of jockey pulley be contained in the foremost of wheelchair, simultaneously its setting height(from bottom) is than step height, so as it can step on step, cooperate back jockey pulley (13) and support after the postbrachium (10) of jockey pulley together the wheelchair vertical lift and after lifting wheelchair, do not hinder the wheel of wheelchair self to reach step (as shown in Figure 3, Figure 4) again.It is the support that can effectively increase wheelchair that simultaneously preceding jockey pulley (3) is contained in top another effect of wheelchair, makes whole leap process more steady and safer.

The step-striding device of used on wheelchair according to claim 1 be characterised in that its preceding jockey pulley (3) and support before the forearm (4) of jockey pulley can be forward when wheelchair is got out of a predicament or an embarrassing situation and do downwards to greatest extent that the Shen goes out, the Shen goes out the back, and it highly is lower than the about 7-10cm of step surface, the gradient (as shown in Figure 5 and Figure 6) in the time of reducing wheelchair greatly and get out of a predicament or an embarrassing situation.Make being tilted in the complete acceptable safety range of wheelchair at this moment.

4. the step-striding device of used on wheelchair according to claim 1 is characterised in that its back jockey pulley (13) and the postbrachium (10) of support back jockey pulley have been contained in wheelchair backmost, it can be driven backward by power arm (6) and go out to cooperate preceding jockey pulley (3) and forearm (4) together the wheelchair vertical lift with downward Shen, and does not hinder the wheel of wheelchair self to reach step (as shown in Figure 3, Figure 4) after lifting wheelchair again.The effect that back jockey pulley stretches out backward can effectively increase the support scope to wheelchair, makes whole leap process more steady and safer.

5. the step-striding device of used on wheelchair according to claim 1 is characterised in that second power set that drive motors and reduction box become wheelchair is housed on its back jockey pulley (13), its role is to promote wheelchair ineffective the time and reach step when the wheelchair original driving device of built on stilts of being picked up.

6. the step-striding device of used on wheelchair according to claim 1 is characterised in that when wheelchair is got out of a predicament or an embarrassing situation and bears the latter half of weight of wheelchair by the postbrachium (10) of back jockey pulley (13) and support back jockey pulley, and is upwards risen by the postbrachium (10) that back power arm (14) drives back jockey pulley (13) and support back jockey pulley with arm (11) by heel.Wheelchair let-down (as shown in Figure 6 and Figure 7) on the ground under the step reposefully at leisure.