CN2540939Y

CN2540939Y - Anti-tilt device for electric wheelchair

Info

Publication number: CN2540939Y
Application number: CN 02207439
Authority: CN
Inventors: 伍必翔
Original assignee: Pihsiang Machinery Mfg Co Ltd
Current assignee: Pihsiang Machinery Mfg Co Ltd
Priority date: 2002-03-12
Filing date: 2002-03-12
Publication date: 2003-03-26
Anticipated expiration: 2012-03-12

Abstract

The invention discloses an anti-tilt device for an electric wheelchair, the anti-tilt device comprising: a bracket pivotally connected to a frame; a pair of anti-tilt wheels pivotally connected to a plate respectively; and an elastic member arranged between the bracket and the frame, which is deformed when each anti-tilt wheel is pushed due to the tilt of the frame, so that the bracket rotates relative to the frame to tilt backward, thereby changing the relative position between the two and preventing the frame from tipping over. In particular, when the electric wheelchair climbs platforms of different heights, the electric wheelchair can be more environmentally adaptable due to the deformation of the elastic member. When the electric wheelchair falls from the platform, the elastic member can be used to absorb the impact force of the fall to reduce the discomfort of the passengers.

Description

The anti-tilt device of electric wheelchair

Technical field

This utility model relates to a kind of electric wheelchair, particularly relates to a kind of anti-tilt device of electric wheelchair, in order to improve the advance safety of electric wheelchair on bad road surface.

Background technology

Because the raising of science and technology and medical level, make people's life-span constantly increase, simultaneously due to wound and residual person's survival rate also improves much, therefore there are comparatively the old and the weak disabled of inconvenience of quite a lot of action in society now, but also because the prosperity of science and technology, handicapped personages such as these the old and the weak and disability still can possess the ability of action quite voluntarily by suitable instrument, now disability the old and the weak personage's range of activity has been different from and only can be confined in the past near the shelter etc. in the limited zone, in disability welfare gradually valued today, the utensil of the various disabled's of helping autonomic activitieses is also constantly weeded out the old and bring forth the new, wherein common and important with wheelchair especially, help by wheelchair, disability the old and the weak personage can enlarge its range of activity effectively, to improve its quality of life.Yet early stage wheelchair is based on manually, and the promotion that must be helped by other people just can be taken action, and so the activity for disability the old and the weak personage just causes sizable inconvenience, otherwise disabled must perfect above the waist, promotes wheelchair voluntarily with hands and moves.For unsound or comparatively for the weakling above the waist, the real non-suitable selection of wheelchair.

Electric wheelchair or electronic representative car then are disabled or the preferable selection of physical weakness personage on short distance is ridden instead of walk, because electric wheelchair or the power-actuated drive system of electric bicycle configuration itself, it is movable voluntarily to be very beneficial for user, do not add external force, What is more, can cause environmental pollution because driven by power is different from the driving device of fossil fuel, therefore be the user's favorite.Generally speaking, the electric wheelchair of four-wheel often is the old and the weak personage's selected vehicles when the short distance outdoor activities, and this type of electric wheelchair has multiple different drive system, or is the front-wheel transmission, or be the trailing wheel transmission, middle transmission person is also arranged, no matter but its kind of drive how, be the safety that ensures user, most electric wheelchairs all has the setting of anti-tip wheel, when its purpose is to prevent that electric wheelchair from passing through rugged road surface,, cause the injury of rider's body because of jolting to overturning.

Generally speaking, because outdoor ground, no matter whether be to lay good road surface, all can have the situation that height rises and falls, therefore have the possibility of climbing high platform of the scalariform of going up on the stage or projection road surface sometimes, and climbing immediately, because front-wheel is climbed up Gao Tai earlier, and trailing wheel still is positioned at lower position, perhaps when moving Xia Gaotai, front-wheel drops to low road surface earlier, and trailing wheel is still stayed on the high platform, so all can cause electric wheelchair to tilt forward and back, in high low head bigger following time of situation, this kind inclination promptly may cause electric wheelchair because of centre-of gravity shift to the scope of electric wheelchair chassis to overturning, cause occupant's injury.

So as mentioned above, most electric wheelchair all can add anti-tip wheel, to prevent that above-mentioned vehicle from overturning situation and taking place.The electric wheelchair that is provided with existing anti-tip wheel that is shown in Figure 15.This existing electric wheelchair is indicated with Ref. No. 10, it includes a vehicle frame 12, set up a seat 14 on it, take for personnel's (not being shown among the figure), and on two sides below the vehicle frame 12, be provided with a pair of main wheel 16, driven by Vidacare corp 18 respectively and driven electric wheelchair 10 and move ahead or retreat.Vidacare corp 18 can be any suitable Vidacare corp, generally speaking is electro-motor, and these electro-motors are fixed on the vehicle frame 12, and are controlled with control device 20 by the occupant.On two sides of the bottom surface, the place ahead of vehicle frame 10, be provided with a pair of front jocket wheel 22 in addition, move in order to the steady of this electric wheelchair 10 to be provided, and if needed also in order to control the moving direction of electric wheelchair 10.

Extend a pair of separated pole 24 at the rear of vehicle frame 12, the end of each pole 24 is provided with an anti-tip wheel 26.On flat road surface when mobile, anti-tip wheel 26 does not contact with ground, therefore unlikelyly influence moving of electric wheelchair 10, and when electric wheelchair 10 is climbed riser station and is caused vehicle to recede, this each anti-tip wheel 26 can touch ground, limit this electric wheelchair 10 sweptback angles, therefore can prevent effectively that electric wheelchair 10 from overturning because of over-tilting.

But the anti-tip wheel of this kind is fixed with respect to the relative position of vehicle frame and can't be adjusted, and the high platform height that can climb for electric wheelchair can limit to some extent, thereby the mobility of restriction electric wheelchair.Therefore real have and need a kind of electric wheelchair anti-tilt device can be arranged, and it has the function that can adjust voluntarily in response to different height, to help to improve the mobility of electric wheelchair.

In addition, existing electric wheelchair can fall high platform colliding surface because of the moment of main wheel the occupant is caused discomfort when moving down on step-like high platform.So need to have a kind of electric wheelchair can when Zi Gaotai is descending, absorb the energy that clashes into, with provide the occupant more comfortable take environment.

Moreover existing electric wheelchair is that the power that relies on CD-ROM drive motor is fully advanced when climbing, and therefore can comparatively require great effort when climbing.So it also has needs that a kind of auxiliary device can be arranged,, can provide more convenient and effectively control to help climbing riser station at electric wheelchair.

The utility model content

The purpose of this utility model is to provide a kind of anti-tilt device of electric wheelchair, it includes anti-tip wheel, link together with vehicle frame by elastic component, therefore anti-tip wheel is to adjust voluntarily because of the high platform situation that electric wheelchair climbs with respect to the relative position of vehicle frame, thereby can enlarge the active ability of electric bicycle, more effectively prevent the situation that electric wheelchair topples.

Another purpose of the present utility model is to provide a kind of electric wheelchair with impact force absorption plant, it mainly includes elastic component, when electric wheelchair was fallen on high platform, its elastic component can absorb the impact force of whereabouts, thereby electric wheelchair occupant's ride comfort sense is provided.

A purpose more of the present utility model is to provide a kind of electric wheelchair, include by elastic component and be connected to anti-tip wheel on the vehicle frame, therefore when climbing riser station, its elastic component can be because of being compressed storage power in it, the final stage that this energy stored is climbed at electric wheelchair, can discharge because of the recovery of flexible member, thereby can electric wheelchair be pushed on the paramount platform in moment, can be more favourable for controlling of electric wheelchair.

The purpose of this utility model is to realize like this, a kind of anti-tilt device of electric wheelchair promptly is provided, and wherein said electric wheelchair includes a vehicle frame, which is provided with a pair of in order to drive the main wheel that electric wheelchair moves, described anti-tilt device includes: a support is pivoted on the described vehicle frame; A pair of anti-tip wheel is pivoted to respectively on the described plate; One elastic component is arranged between described support and described vehicle frame, produces distortion when described each anti-tip wheel is urged because of vehicle frame tilts, so that described support, changes the relative position of the two with respect to described vehicle frame hypsokinesis and turn, prevents that vehicle frame from toppling over.

Specifically, the anti-tilt device of electric wheelchair described in the utility model, wherein the vehicle frame of this electric wheelchair is provided with a seat, take for personnel, and it nextly is provided with a pair of main wheel, driven and driven this electric wheelchair and move by electro-motor, other is provided with actuation means, for the running of passenger control electro-motor.In addition, be provided with front jocket wheel,, and make the running of electric wheelchair more firm in order to the direct of travel of control electric wheelchair in the place ahead of vehicle frame.Rear at vehicle frame is provided with anti-tilt device with respect to front jocket wheel, and it includes a support, and its front side end is pivoted to the place, rear of vehicle frame, then is provided with at least one anti-tip wheel on its rear side end.In addition between the rear side end of this support and vehicle frame, be provided with at least one elastic component, it can be because of the rotation compression of support with respect to vehicle frame, thereby change the relative position between anti-tip wheel and vehicle frame, so when this electric wheelchair climbs the high platform of differing heights, can make this electric wheelchair have more environmental suitability because of the distortion of elastic component.The compression that this elastic component is produced when climbing is storage power within it, and the moment of this energy on electric wheelchair climbs paramount platform can discharge because of the reinstatement of elastic component, thereby make electric wheelchair can more successfully climb up Gao Tai.In addition, when this elastic component falls on platform at electric wheelchair, can be in order to absorb the impact force of whereabouts, to lower the discomfort of passenger.

Description of drawings

Fig. 1 is the axonometric chart of electronic step car first embodiment of the present utility model;

Fig. 2 is the three-dimensional exploded view of this utility model first embodiment electric wheelchair;

Fig. 3 is the side view of this utility model electric wheelchair in the phase I of climbing riser station;

Fig. 4 is the side view of this utility model electric bicycle in the second stage of climbing riser station;

Fig. 5 is the stereo appearance figure of Fig. 4;

Fig. 6 is the side view of this utility model electric wheelchair in the phase III of climbing riser station;

Side view when Fig. 7 falls on Zi Gaotai for this utility model electric wheelchair;

Fig. 8 is the three-dimensional exploded view of this utility model second embodiment electric wheelchair;

Fig. 9 is the axonometric chart of the 3rd embodiment of electric wheelchair of the present utility model;

Figure 10 is the three-dimensional exploded view of this utility model the 3rd embodiment electric wheelchair;

Figure 11 is the three-dimensional exploded view of this utility model the 4th embodiment electric wheelchair;

Figure 12 is the axonometric chart of the 5th embodiment of electric wheelchair of the present utility model;

Figure 13 is the three-dimensional exploded view of this utility model the 5th embodiment electric wheelchair;

Figure 14 is the three-dimensional exploded view of this utility model the 6th embodiment electric wheelchair;

Figure 15 is the axonometric chart with electric wheelchair of existing anti-tip wheel.

The specific embodiment

At first see also Fig. 1 and Fig. 2, wherein demonstrate first embodiment of electric wheelchair of the present utility model, it is indicated with Ref. No. 100, it includes a vehicle frame 112, set up a seat 114 on it, take for personnel's (not being shown among the figure), and on two sides below the vehicle frame 112, be provided with a pair of main wheel 116, can be driven and drive electric wheelchair 100 by Vidacare corp 118 and move.Vidacare corp 118 can be any suitable Vidacare corp, for example electro-motor shown in the figure.This electro-motor 118 is fixed on the vehicle frame 112, and is controlled by the control device 120 that is arranged on the seat 114.On two sides of the bottom surface, the place ahead of vehicle frame 112, be provided with a pair of front jocket wheel 122 in addition, in order to steadily moving of this electric wheelchair 100 to be provided, also in order to control the route of electric wheelchair 100.

Vehicle frame 112 includes and a kind ofly rearward extends and mutually separated L shaped bar portion 128 with respect to front jocket wheel 122, this each L shaped bar portion 128 includes the horizontal position that extend horizontally away or is called the first position 128A and extends and vertical position that approximate vertical makes progress or be called the second position 128B from horizontal position 128A end on vehicle frame 112.Between vertical position 128B, set up a cross bar 130.Be provided with two separated perforation 132 on cross bar 130, its function will further be illustrated hereinafter.

Anti-tilt device of the present utility model includes a supporting structure, and it is indicated with Ref. No. 134, is arranged at the rear of vehicle frame 112.This supporting structure 134 includes a plate 136, and its width can be for placing between this each L shaped bar portion 128, and two sides of this plate 136 stretch out a vertical sidewall 138 respectively downwards, are provided with a pair of first perforation 140 on sidewall 138, are aligned with each other haply.With respect to this two perforation 140, on the horizontal position 128A of L shaped bar portion 128, respectively be provided with a hole 142, be aligned in perforation 140, can penetrate for an axostylus axostyle 144, on the horizontal position 128A that plate 136 is pivoted to L shaped bar portion 128.

On two side sidewalls 138 of plate 136, be provided with a pair of second perforation 146 in addition, aligned with each other haply, can supply one 148 to penetrate, these two side ends of 148 are to protrude into outside the sidewall 138, and are respectively equipped with an anti-tip wheel 150 thereon.For 138 of sidewalls avoiding anti-tip wheel 150 and plate 136 produce unnecessary friction, and for adjusting the spacing of anti-tip wheel 150, be provided with a sleeve pipe 152 between each anti-tip wheel 150 and the sidewall 138 relative with it, it is sheathed on the axle 148, anti-tip wheel 150 and sidewall 138 can be kept apart.

Preferably when this electric wheelchair 100 was mobile on flat road surface, anti-tip wheel 150 did not touch this road surface to the size of this each anti-tip wheel 150, and promptly on normal flat road surface when mobile, anti-tip wheel 150 is suspended in and contacts with the road surface in the air and not.

Anti-tilt device of the present utility model also includes a pair of elastic component 154, it is helical spring in the present embodiment, be set up between plate 136 and the cross bar 130, strain function by elastic component 154, plate 136 can rotate with respect to vehicle frame 112, thereby change the spatial relationship of anti-tip wheel 150, can change the relative position of the two with respect to vehicle frame 112.Skilled personnel recognize, though be to be that example illustrates this utility model with the helical spring in this embodiment, but other elastically deformable and the elastic component of storage power all can be applicable on this utility model, and can not break away from creation spirit of the present utility model.

Helical spring 154 can be fixed on plate 136 and the cross bar 130 in any suitable manner, in this embodiment, this each helical spring 154 is sheathed on respectively on the support bar 156, the upper extremity of each support bar 156 is passed each perforation 132 on the

cross bar

130, and 160 be fixed on the cross bar 130 by a pin, then be provided with a through hole 162 on another end of this support bar 156, can run through for axle 148, in this embodiment, it is that bar 156 mutually perpendicular tubulose positions therewith are set on this end of support bar 156, in order to the relative end of fixing helical spring 154, and this through hole 162 promptly is arranged in this tubulose position.Knowing those skilled in the art should recognize, it also can not be provided with this tubulose position, and directly is provided with the portion of expanding in the end of bar 156, and offers through hole 162 get final product in it.Offer slotted eye 164 on the plate 136, be bonded to for support bar 156 passes on the axle 148.

For reducing the unnecessary friction and the wearing and tearing of tube interdigit of support bar 156, between two tubulose positions, can add a sleeve pipe 166, separating the two, yet this is not to be imperative, only is the selection of design.

Cooperate and consult Fig. 3 to Fig. 6, wherein demonstrate electric wheelchair 100 rises to the three phases on the step-like high platform 170 from smooth road surface 168 situation among Fig. 3, Fig. 4 and Fig. 6 respectively, Fig. 5 then is the stereo appearance figure of Fig. 4.As shown in Figure 3, when this electric wheelchair 100 is climbed riser station, its front jocket wheel 122 can touch the lateral margin 171 of high platform 170 earlier, and because of the thrust of CD-ROM drive motor 118 and occupant's the climbing that makes progress of controlling, at this moment because the upwards climbing of front jocket wheel 122 is mobile, will cause vehicle frame 112 and on seat 114 recede, thereby make anti-tip wheel 150 touch road surface 168.

As Fig. 4 and shown in Figure 5, when front jocket wheel 122 continues to climb when rising on the high platform 170, because anti-tip wheel 150 itself contacts with each other with road surface 168, and owing to be pivoted on the vehicle frame 112 in order to the plate 136 that supports anti-tip wheel 150, and supported by elastic component 154, so vehicle frame 112 recedes further and can cause the compression of elastic component 154.Compression by elastic component 154, anti-tip wheel 150 can change with respect to the relative position of vehicle frame 112, and can allow front jocket wheel 122 to continue to move up on paramount 170, yet main wheel 116 still can keep contacting with road surface 168 at the same time, guarantees the easy motion process of electric wheelchair 100.

After front jocket wheel 122 climbed on paramount 170, electric wheelchair 100 continued to move forward to main wheel 116 and touches the lateral margin 171 of high platform 170 and upwards climb, as shown in Figure 6.In this process, elastic component 154 is kept its state that is compressed distortion always, therefore be about to climb paramount 170 the time when main wheel 116, the elastic component 154 of anti-tip wheel 150 can be because of the effect of the strength that no longer is subjected to receding, so can discharge the stored energy of its distortion on the contrary, and anti-tip wheel 150 moved back to its original position with respect to vehicle frame 112, this releases in the process of energy, its elasticity strength will act between the vehicle frame 112 and anti-tip wheel 150 of electric wheelchair 100, form a power-assisted amount of comforting that upwards raises, thereby electric wheelchair 100 is also pushed on paramount 170 rapidly.

Cooperate shown in Figure 7 again, when electric wheelchair 100 will be moved downward on the lower road surface 172 on high platform 170, when main wheel 116 moves to high platform 170 lateral margins, 173 places and plunks down, anti-tip wheel 150 can touch on the surface of high platform 170, and because elastic component 154 has the event of compressible deformability, the potential energy and the impact force that fall on the road surface 172 to be disengaged from high platform 170 of vehicle frame 112 can be absorbed by elastic component 154, thereby can reduce occupant's discomfort effectively, and owing to the compression reason also disappears, the energy that elastic component 154 is absorbed also can promptly be disengaged, this act of releasing energy can have one component that pushes away forward, can help advancing forward of electric wheelchair 100.

Please refer to Fig. 8, wherein demonstrate second embodiment of the present utility model, the support element of this utility model anti-tilt device also can constitute by another frame mode, and supporting structure is indicated with Ref. No. 190 in this article, and it is arranged at the rear as embodiment one vehicle frame 112.This supporting structure 190 is the cubic frame body framves 192 that become by a body, and its width is can be for placing between this each L shaped bar portion 128, and two side sidewalls 194 of this cubic frame body frame 192 are provided with a pair of first perforation 196, and it is aligned with each other haply.With respect to this two perforation 196, on the horizontal position 128A of L shaped bar portion 128, also respectively be provided with a hole 142, be aligned in perforation 196, can penetrate for an axostylus axostyle 144, on the horizontal position 128A that cubic frame body frame 192 is pivoted to L shaped bar portion 128.On two side sidewalls 194 of cubic frame body frame 192, be provided with a pair of second perforation 198 in addition, also be aligned with each other haply, can 148 penetrate for axle, these two side tip end projects of 148 and are respectively equipped with an anti-tip wheel 150 thereon to cubic frame body frame 192.For fear of the unnecessary friction of 194 generations of sidewall of anti-tip wheel 150 and cubic frame body frame 192, also for adjusting the spacing of anti-tip wheel 150, between each anti-tip wheel 150 and cubic frame body frame 192 sidewalls 194 relative, be provided with a sleeve pipe 152 with it, it is sheathed on the axle 148, anti-tip wheel 150 and cubic framework frame 192 can be kept apart.

Anti-tilt device of the present utility model further also includes a pair of elastic component 154, it is helical spring in this enforcement, be set up between cubic framework frame 192 and the cross bar 130, by elastic component 154 strain functions, four directions framework frame 192 can rotate with respect to vehicle frame 112, thereby change the spatial relationship of anti-tip wheel 150, can change the relative position of the two with respect to vehicle frame 112.

Helical spring 154 can be fixed on cubic framework frame 192 and the cross bar 130 in any suitable manner, in this embodiment, this each helical spring 154 is sheathed on respectively on the support bar 156, the upper extremity of each support bar 156 is passed perforation 132 on the

cross bar

130, and 160 be fixed on the cross bar 130 by a pin, then be provided with a through hole 162 on another end of this support bar 156, run through for axle 148, in this embodiment, it is provided with bar 156 mutually perpendicular tubulose positions therewith on this end of support bar 156, in order to the relative end of fixing helical spring 154, and this through hole 162 promptly is arranged in this tubulose position, knows those skilled in the art and should recognize, it also can not be provided with this tubulose position, and directly be provided with the portion of expanding, and in it, offer through hole 162 and get final product in the end of bar 156.

The manner of execution of the electric wheelchair 100 of this second embodiment is identical with the electric wheelchair 100 of aforementioned first embodiment, therefore no longer heavily covers explanation at this.

Please refer to Fig. 9 and Figure 10 below, wherein demonstrate the 3rd embodiment of the present utility model, shown with Ref. No. 200, include a vehicle frame 212, set up a seat 214 on it, take for people's (not being shown among the figure), and on two sides below the vehicle frame 212, be provided with a pair of main wheel 216, can be driven and drive electric bicycle 200 by Vidacare corp 218 and move ahead or retreat.

To first embodiment shown in Figure 7, this Vidacare corp 21 can be any suitable Vidacare corp, for example electro-motor as Fig. 1.This electro-motor 218 is fixed on the vehicle frame 212, and controlled by the control device 220 that is arranged on the seat 214, on two sides of the bottom surface, the place ahead of vehicle frame 212, be provided with a pair of front jocket wheel 222 in addition, in order to steadily moving of this electric wheelchair 200 to be provided, also in order to control the route of electric wheelchair 200.

The rear of vehicle frame 212 is provided with a pair of rearward the extension and separated mutually L shaped bar portion 228.This each L shaped bar portion 228 includes the horizontal position that extend horizontally away or is referred to as the first position 228A and extends and vertical position that approximate vertical makes progress or be referred to as the second position 228B from horizontal position 228A end on vehicle frame 212.Between vertical position 228B, set up a cross bar 230, on cross bar 230, be provided with two separated perforation 232.

Be provided with a supporting structure 234 at the rear of vehicle frame 212, it comprises a plate 236, and its width can be for placing between this each L shaped bar portion 228, and two sides of this plate 236 stretch out a vertical sidewall 238 respectively downwards, on sidewall 238, be provided with a pair of first perforation 240, aligned with each other haply.With respect to this two perforation 240, on the horizontal position 228A of L shaped bar portion 228, respectively be provided with a hole 242, be aligned in perforation 240, can penetrate for an axostylus axostyle 244, plate 236 is pivoted to the horizontal position 228A of L shaped bar portion 228.

On two side sidewalls 238 of plate 236, be provided with a pair of second perforation 246 in addition, aligned with each other haply, can penetrate for one 248, these two side tip end projects of 248 and are respectively arranged with an anti-tip wheel 250 thereon to sidewall 238.Be 238 unnecessary friction and abrasions of generation of sidewall of avoiding anti-tip wheel 250 and plate 246, reach between the sidewall 238 relative at each anti-tip wheel 250 and be provided with a sleeve pipe 252 that it is sheathed on the axle 248, anti-tip wheel 250 and sidewall 238 can be kept apart with it.

Anti-tilt device of the present utility model further includes a pair of elastic component 254, its in the present embodiment with identical shown in first embodiment be helical spring, be set up between plate 236 and the cross bar 230, strain function by elastic component 254, plate 236 can rotate with respect to vehicle frame 212, thereby changes the relative position of anti-tip wheel 250 with respect to vehicle frame 212.

Helical spring 254 is sheathed on respectively on the support bar 256, and the below end of each support bar 256 is provided with a tubulose position (not indicating), is provided with a perforation 262 in it, and its direction is vertical haply with support bar 256, runs through for axle 248.On plate 236, offer two slotted eyes 264, can pass for this two support bar 256, to combine with axle 248.

Anti-tilt device of the present utility model further includes an adjusting device, it has a tab 276, offer two holes 278 on it, the upper extremity of this each support bar 256 runs through via hole 278 earlier, and further extend and pass perforation 232 on the cross bar 230, and be fixed on the cross bar 230 by a pin 260.Elastic component 254 is between the tubulose position of tab 276 and support bar 256.

On cross bar 230, be provided with a screwed hole 280 in addition, can be for being screwed with a bolt 282, the end of this bolt 282 is provided with one and expands portion 284, contact with tab 276, can adjust the distance of tab 276 by swivel bolt 282, thereby can apply predeformation amount, to adjust the actuating range of elastic component 254 elastic component 254 with respect to plate 236, and can when elastic component 254 elastic fatigues, be adjusted.

For the tube interdigit that reduces support bar 256 unnecessary friction and wearing and tearing, between two tubulose positions, can add a sleeve pipe 266, separating the two, yet this is not to be imperative, only is the selection of design.

The manner of execution of the electric wheelchair 200 of this 3rd embodiment is identical with the electric wheelchair 100 of aforementioned first embodiment, therefore no longer heavily covers explanation at this.

Please refer to shown in Figure 11, wherein demonstrate the 4th embodiment of the present utility model, it is the simplification enforcement that second embodiment is applied to the 3rd embodiment, described with second embodiment, the support element of this utility model anti-tilt device also can constitute by another frame mode, supporting structure is indicated with Ref. No. 290 in this article, and it is arranged at the rear as embodiment one vehicle frame 212.This supporting structure 290 is the cubic frame body framves 292 that are made of a body, and its width can be for placing between this each L shaped bar portion 228, and two side sidewalls 294 of this cubic frame body frame 292 are provided with a pair of first perforation 296, and it is aligned with each other haply.

With respect to this two perforation 296, on the horizontal position 228A of L shaped bar portion 228, also respectively be provided with a hole 242, be aligned in perforation 296, can penetrate for an axostylus axostyle 244, on the horizontal position 228A that cubic frame body frame 292 is pivoted to L shaped bar portion 228.

Two side sidewalls 294 at cubic frame body frame 292 are provided with a pair of second perforation 298 in addition, also be aligned with each other haply, can 248 penetrate for axle, these two side tip end projects of 248 and are respectively equipped with an anti-tip wheel 250 thereon to cubic frame body frame 292.For the unnecessary friction of 294 generations of sidewall of avoiding anti-tip wheel 250 and cubic frame body frame 292, also for adjusting the spacing of anti-tip wheel 250, between each anti-tip wheel 250 and cubic frame body frame 292 sidewalls 294 relative, be provided with a sleeve pipe 252 with it, it is sheathed on the axle 248, the anti-tip wheel 250 and the sidewall 294 of cubic framework frame 292 can be kept apart.

The anti-tilt device of present embodiment further also includes a pair of elastic component 254, its in the present embodiment be all helical spring mutually shown in first embodiment, be set up between cubic frame body frame 292 and the cross bar 230, strain function by elastic component 254, four directions frame body frame 292 can rotate with respect to vehicle frame 212 hypsokinesis, thereby changes the relative position of anti-tip wheel 250 with respect to vehicle frame 212.

Helical spring 254 is sheathed on respectively on the support bar 256, and the below end of each support bar 256 is provided with a tubulose position, is provided with a through hole 262 in it, and its direction is vertical haply with support bar 256, can run through for axle 248.

Other members and the manner of execution thereof of this 4th embodiment electric wheelchair 200, identical with the electric wheelchair 200 of aforementioned the 3rd embodiment, therefore also no longer heavily cover explanation at this.

Please refer to Figure 12 and Figure 13 below, wherein demonstrate the 5th embodiment of electric wheelchair of the present utility model, the simplified embodiment of its first embodiment, indicated with Ref. No. 300, it includes a vehicle frame 312, sets up a seat 314 on it, takes for personnel's (not being shown among the figure), and on two sides below the vehicle frame 312, be provided with a pair of main wheel 316, can be driven and be driven electric wheelchair 300 by Vidacare corp 318 and move ahead or retreat.To first embodiment shown in Figure 7 or the 3rd embodiment shown in Fig. 9 and Figure 10, this Vidacare corp 318 can be any suitable Vidacare corp, for example electro-motor as Fig. 1.This electro-motor 318 is fixed on the vehicle frame 312, and is controlled by the control device 320 that is arranged on the seat 314.On two sides of the bottom surface, the place ahead of vehicle frame 312, be provided with a pair of front jocket wheel 322 in addition, in order to steadily moving of this electric bicycle 300 to be provided, also in order to control the route of electric wheelchair 300.

The rear of vehicle frame 312 is provided with a pair of rearward the extension and separated mutually L shaped bar portion 328, its each on the locus, be provided with respect to front jocket wheel 322.This each L shaped bar portion 328 includes the horizontal position that extend horizontally away or the first position 328A and extends and the vertical position or the second position 328B that approximate vertical makes progress from horizontal position 328A end on vehicle frame 312.Between vertical position 328B, set up a cross bar 330, on cross bar 330, be provided with a perforation 332.

Anti-tilt device of the present utility model includes a supporting structure 334, is arranged at the rear of vehicle frame 312.This supporting structure 334 includes a plate 336, and its width can be for placing between this each L shaped bar portion 328, and two sides of this plate 336 stretch out a vertical sidewall 338 respectively downwards, are provided with a pair of first perforation 340 on sidewall 338, and are aligned with each other haply.With respect to this two perforation 340, on the horizontal position 328A of L shaped bar portion 328, respectively be provided with a hole 342, be aligned in perforation 340, can penetrate for an axostylus axostyle 344, on the horizontal position 328A that plate 336 is pivoted to L shaped bar portion 328.

Be provided with a pair of the 3rd perforation 346 on two side sidewalls 338 of plate 336 in addition, it is aligned with each other haply, can penetrate for one 348, and these two side tip end projects of 348 and are respectively arranged with an anti-tip wheel 350 thereon to sidewall 338.For avoiding the anti-tip wheel 350 and the sidewall 338 of plate 346 to produce unnecessary friction, reach between the sidewall 338 relative at each anti-tip wheel 350 and be provided with a sleeve pipe 352 with it, it is sheathed on the axle 348, anti-tip wheel 350 and sidewall 338 can be kept apart.

Anti-tilt device of the present utility model further includes an elastic component 354, it is to be helical spring with identical shown in first embodiment or second embodiment in the present embodiment, be set up between plate 336 and the cross bar 330, strain function by elastic component 354, plate 336 can rotate with respect to vehicle frame 312, thereby changes the relative position of anti-tip wheel 350 with respect to vehicle frame 312.

Helical spring 354 is sheathed on the support bar 356, then is provided with a tubulose position on the below end of support bar 356, is provided with a through hole 362 in it, and its direction is vertical haply with bar 356, can run through for axle 348.On plate 336, offer slotted eye 364, can pass for this support bar 356, to combine with axle 348.The upper extremity of support bar 356 then penetrates the perforation 332 on the cross bar 330, and is fixed on the cross bar 330 by a pin 360.On axle 348, be arranged with two sleeve pipes 366 in addition, lay respectively between two side flanges 338 of the tubulose position of support bar 356 and plate 336, to reduce unnecessary friction and wearing and tearing therebetween.

The manner of execution of the electric wheelchair 300 of this 5th embodiment also electric wheelchair 100 with aforementioned first embodiment is identical, does not therefore repeat them here.Please refer to shown in Figure 14, wherein demonstrate the 6th embodiment of the present utility model, it is the simplification enforcement that second embodiment is applied to the 5th embodiment, described with second embodiment, the support element of this utility model anti-tilt device also can constitute by another frame mode, supporting structure is indicated with Ref. No. 390 in this article, and it is arranged at the rear as embodiment one vehicle frame 312.The cubic frame body frame 392 that this supporting structure 390 is become by a body, its width can be for placing between this each L shaped bar portion 328, and two side sidewalls 394 of this cubic frame body frame 392 are provided with a pair of first perforation 396, and are aligned with each other haply.

With respect to this two perforation 396, on the horizontal position 328A of L shaped bar portion 328, also respectively be provided with a hole 342, be aligned in perforation 396, can penetrate for an axostylus axostyle 344, on the horizontal position 328A that cubic frame body frame 392 is pivoted to L shaped bar portion 328.On two side sidewalls 394 of cubic frame body frame 392, be provided with a pair of second perforation 398 in addition, also be aligned with each other haply, can 348 penetrate for axle, these two side tip end projects of 348 and are respectively equipped with an anti-tip wheel 350 thereon to cubic frame body frame 392.For the unnecessary friction of 294 generations of sidewall of avoiding anti-tip wheel 350 and cubic frame body frame 292, also for adjusting the spacing of anti-tip wheel 350, between each anti-tip wheel 350 and cubic frame body frame 392 sidewalls 394 relative, be provided with a sleeve pipe 352 with it, it is sheathed on the axle 348, the anti-tip wheel 350 and the sidewall 394 of cubic framework frame 392 can be kept apart.

The anti-tilt device of present embodiment further also includes a pair of elastic component 354, it is to be helical spring with identical shown in first embodiment in the present embodiment, it is set up between cubic frame body frame 392 and the cross bar 330, strain function by elastic component 354, four directions frame body frame 392 can rotate with respect to vehicle frame 312 hypsokinesis, thereby changes the relative position of anti-tip wheel 350 with respect to vehicle frame 312.

Helical spring 354 is sheathed on the support bar 356, then is provided with a tubulose position on the below end of support bar 356, is provided with a through hole 362 in it, and its direction is vertical haply with bar 356, can run through for axle 348.The upper extremity of support bar 356 then penetrates the perforation 332 on the cross bar 330, and is fixed on the cross bar 330 by a pin 360.

And other members and the manner of execution thereof of the electric wheelchair 300 of this 6th embodiment are identical with the electric wheelchair 300 of aforementioned the 5th embodiment, therefore no longer heavily cover explanation at this.

Practice the above, this utility model provides a kind of improved electric wheelchair, and it not only can provide more steady and safe motor process, and can have quite simple structure, is very beneficial for producing in batches.

Claims

1. An anti-tilt device for an electric wheelchair, wherein the electric wheelchair includes a vehicle frame on which a pair of main wheels are arranged to drive the electric wheelchair to move, it is characterized in that the anti-tilt device includes: a bracket , pivotally connected to the frame; a pair of anti-rolling wheels, pivotally connected to the plate respectively; an elastic member, arranged between the bracket and the frame, between the anti-rolling wheels When the frame is tilted and pushed, it deforms, so that the bracket tilts backward relative to the frame and rotates, changing the relative position between the two, and preventing the frame from toppling.

2. The anti-rolling device for an electric wheelchair according to claim 1, wherein the support is a sheet body, and the two end edges of the sheet respectively have a side wall, and aligned holes are arranged on it, The frame includes two separate rods for the plates to be accommodated therebetween, and each frame rod is provided with holes aligned with the holes on the two side walls of the plates. A rod passes through the holes and holes to pivotally connect the plate to the frame.

3. The anti-rolling device for electric wheelchairs as claimed in claim 1, wherein the support is a square frame made of pipe fittings, and the two end edges of the square frame have side walls respectively, on which The holes are aligned, and the frame includes two separated rods for the square frame body to be accommodated therebetween, and each of the frame rods is provided with holes on the side walls of the two sides of the square frame body. For the aligned holes, a shaft passes through the holes and holes to pivotally connect the square frame body to the vehicle frame.

4. The anti-rolling device for an electric wheelchair according to claim 1, wherein the vehicle frame includes two separated L-shaped rods, which have a first portion extending from the rear of the vehicle frame, and a second Two parts, which extend vertically upward from the first part, a cross bar is arranged between the second parts, and the elastic member is arranged between the cross bar and the bracket.

5. The anti-tilt device for an electric wheelchair according to claim 4, wherein the elastic member is a coil spring, which is sleeved on a support rod, and the lower end of the support rod is fixed on the bracket , and its upper end is fixed on the cross bar.

6. The anti-rolling device for an electric wheelchair according to claim 5, wherein the upper part of the support rod passes through a hole provided on the cross bar, and is fixed by a pin.

7. The anti-tilt device for an electric wheelchair according to claim 5, wherein a shaft hole is provided under the support rod, and is sleeved on a shaft provided on the bracket.

8 . The anti-rolling device for an electric wheelchair according to claim 7 , wherein two ends of the shaft protrude beyond two sides of the bracket, and the two anti-rolling wheels are respectively coupled to the shafts.

9. The anti-rolling device for an electric wheelchair according to claim 8, wherein the support has two side walls, on which are provided holes aligned with each other for the two ends of the shaft to pass through.

10 . The anti-rolling device for electric wheelchairs according to claim 9 , wherein sleeves are sheathed on the two ends of the shaft respectively, and are arranged between each anti-rolling wheel and the opposite side wall of the bracket. 11 .

11. The anti-rolling device for an electric wheelchair according to claim 1, characterized in that it comprises two elastic members arranged between the vehicle frame and the bracket.

12. The anti-rolling device for an electric wheelchair according to claim 1, further comprising an adjusting device for adjusting the pre-deformation amount of the elastic member.

13. The anti-tilt device for an electric wheelchair according to claim 12, wherein the adjusting device includes a bolt screwed into a threaded hole provided on the vehicle frame, an enlarged portion is provided at the end of the bolt, A movable adjustment piece is engaged with the enlarged part, and the elastic member is arranged between the adjustment piece and the bracket.

14. The anti-rolling device for an electric wheelchair according to claim 13, wherein the vehicle frame includes two separated L-shaped rods, which have a first portion extending from the rear of the vehicle frame, and a second Two parts, which extend vertically upward from the first part, a cross bar is arranged between the second parts, the threaded hole is arranged on the cross bar, and its enlarged part is connected to the adjustment piece , the elastic member is disposed between the adjustment piece and the bracket.

15. The anti-rolling device for an electric wheelchair according to claim 14, characterized in that it comprises two elastic members disposed between the adjustment piece and the bracket.

16. The anti-tilt device for an electric wheelchair according to claim 15, wherein each of the elastic members is a coil spring, each of which is sleeved on a support rod, and the lower end of the support rod is pivotally connected to on the bracket, and its upper end is fixed on the cross bar.

17. The anti-rolling device for an electric wheelchair according to claim 16, wherein the upper part of the support rod passes through a hole provided on the cross bar and is fixed by a pin.

18. The anti-rolling device for an electric wheelchair according to claim 16, wherein the upper end of the support rod passes through a hole provided on the adjustment piece, and extends through the hole provided on the horizontal , and the helical spring sleeved thereon is fixed between the adjustment piece and the bracket.

19. The anti-rolling device for an electric wheelchair according to claim 1, wherein the bracket is extended from the vehicle frame to install wheels thereon, and is connected to the vehicle frame with springs.