CN201042485Y

CN201042485Y - Electric wheelchair

Info

Publication number: CN201042485Y
Application number: CN 200720140110
Authority: CN
Inventors: 郑明权
Original assignee: GUOMU INDUSTRY Co Ltd
Current assignee: GUOMU INDUSTRY Co Ltd; Merits Health Products Co Ltd
Priority date: 2007-03-27
Filing date: 2007-03-27
Publication date: 2008-04-02
Anticipated expiration: 2017-03-27

Abstract

An electric wheelchair is formed by pivot-connecting a front wheel seat and a middle wheel seat to a pivot-connecting end of a frame, and arranging a flexible element among the connections to provide buffer for the front wheel seat and the middle wheel seat relative to the frame. The utility model has the advantages of smart elements, easy design and production, low production cost, convenient assembling and maintenance, and long service life.

Description

Electric wheelchair

Technical field

This utility model is relevant with electric wheelchair, but is meant the electric wheelchair of a kind of smooth-ride in uneven road surface in detail.

Background technology

Known electric wheelchair is held before, during and after vehicle frame and is disposed two front-wheels, two driving wheels and two trailing wheels in regular turn, and left and right two sides of this vehicle frame dispose a preceding wheel seat and a driving wheel seat that one connects molding respectively, wheel seat and this driving wheel seat also link with this front-wheel and this driving wheel respectively before being somebody's turn to do, yet, because the rigid structure that wheel seat and this driving wheel seat are formed in one before being somebody's turn to do will be so will cause electric wheelchair can't smoothly and hug the road in the road surface of jolting; For improving above-mentioned defective, have the dealer with preceding wheel seat with drive wheel seat and be hubbed at the be separated by position of a specific range of two of vehicle frame respectively, and between this preceding wheel seat and this driving wheel seat, a linked component is set, thus, when this electric wheelchair travelled on uneven road surface, preceding wheel seat/driving wheel seat is this vehicle frame pivot pendulum relatively, and drove driving wheel seat/preceding wheel seat pivot pendulum by this linked component, so that can keeping with the road surface simultaneously with this driving wheel, this front-wheel contacts, to keep vehicle body steady; And this preceding wheel seat and this driving wheel seat are provided with shock-absorbing materials such as buffer stopper respectively between itself and vehicle frame, in order to absorbing vibration so that drive take more comfortable.

Yet, the preceding wheel seat of above-mentioned electric wheelchair with drive between wheel seat and must be connected by the linked component of complexity, begin to impel front-wheel and driving wheel to keep in touch with the road surface simultaneously, it is right because known linked component is most connecting rods different in size interconnects and form, therefore each member is quite complicated in design and assembly, cost is also higher, and stress concentrates on the junction of those connecting rods easily, causes car body to can't bear life-time service; Moreover, because the above-mentioned buffer stopper that is located between preceding wheel seat/driving wheel seat and the vehicle frame, all near driver seat, after so those buffer stoppers must treat that shaking force is passed to the nearly driver seat of vehicle frame place, can bring into play damping capaicty,, cause to drive and take advantage of uncomfortable on the seat so shock-absorbing effect is limited.

The utility model content

The purpose of this utility model is to provide a kind of electric wheelchair, so that preceding wheel seat and middle wheel seat are articulated in the vehicle frame same position respectively, be connected rigid structure to replace known preceding wheel seat with the one that drives wheel seat, and between preceding wheel seat and middle wheel seat, an elastic component is set, to replace the linked component of known complexity, with provide this preceding wheel seat and should in the buffering of relative this vehicle frame pivot pendulum of wheel seat, have that member exquisiteness, design are produced easily, cost of manufacture is low, the assembling maintenance reaches advantages such as durable easily.

For achieving the above object, the electric wheelchair that this utility model provides, it comprises:

One vehicle frame, this vehicle frame have a front end and a rear end, and two sides have a pivot end respectively about it;

Wheels before a pair of, be positioned at this vehicle frame front end two sides, and a wheel seat and a front-wheel before it has one respectively, should have one first binding end and one second binding end by preceding wheel seat, this first binding end is compared this second binding end near this vehicle frame, the pivot end of this first binding end and this vehicle frame articulates, and this second binding end and this front-wheel connect to be established;

One centering wheels, two sides between this vehicle frame front and back ends, and it has respectively in one takes turns in the wheel seat and, should have one first link and one second link by middle wheel seat, this first link is compared this second link near wheels before being somebody's turn to do, the pivot end of this first link and this vehicle frame articulates, this second link with should in wheel connect and establish;

The pair of rear wheels group is positioned at this vehicle frame rear end two sides; And

Pair of resilient members, it is located at this preceding wheel seat respectively and is somebody's turn to do between the middle wheel seat, this preceding wheel seat is provided and is somebody's turn to do the buffering that relative this vehicle frame pivot of middle wheel seat is put.

Described electric wheelchair, wherein respectively two ends of this elastic component reach and should middle wheel seat activity articulate with this preceding wheel seat respectively.

Described electric wheelchair, wherein should comprise a stand and a driving member by middle wheel seat, this first link is the one first hole portion that is formed at this stand, the pivot end of this vehicle frame is a body, this body passes this first hole portion and forms with this stand and to articulate, and passes this first binding end and form with this preceding wheel seat and to articulate; This driving member is fixed on this stand, and has a power transmission shaft, this power transmission shaft constitute this second link and with this in take turns and be coupling.

Described electric wheelchair, wherein should between this first link and this second link, be provided with one second hole portion by middle wheel seat, should be provided with one the 3rd hole portion by preceding wheel seat between this first binding end and this second binding end, two ends of this elastic component are arranged in this second hole portion and the 3rd hole portion respectively.

Described electric wheelchair, wherein this stand has two parallel side plates and a top board that is connected this two side plate, respectively this side plate has a perforation, this two perforation constitutes the first hole portion of this stand, and this driving member and at least one this side plate are affixed, and this top board has two parallel axis holes, this two axis hole constitutes the second hole portion of this stand, should have a sleeve pipe between this two side plate by preceding wheel seat, this sleeve pipe constitutes this first binding end, and the pivot end of this vehicle frame passes this two perforation and this sleeve pipe.

Described electric wheelchair, wherein should have wheel carrier telescopic joint and that extend towards this vehicle frame the place ahead by preceding wheel seat with this, this wheel carrier front end constitutes this second binding end and connects with this front-wheel to be established, and this wheel carrier is outstanding between this first, second binding end to be formed with a bogie side frame, and this bogie side frame has the 3rd hole portion.

Described electric wheelchair, wherein respectively this elastic component has a bolster and a compression spring, this bolster has a sleeve and a piston, this sleeve one end is articulated in wheel seat in this, and have one and support portion, this piston one end is articulated in this preceding wheel seat, and end stretches into this sleeve and can move relative to this sleeve in addition, and two ends of this compression spring are this telescopic portion and this piston of supporting of contact respectively.

Described electric wheelchair, wherein this sleeve has an external screw thread face, and this bolster has an adjustment part, and spiral shell advances or spiral shell moves back but this adjustment part spiral shell is located on this telescopic external screw thread face, and this adjustment part constitutes the portion that should support.

Described electric wheelchair comprises a seat group, and this vehicle frame is provided with an axial stay pipe between its front and back ends, and this stay pipe is compared the pivot end of this vehicle frame near these back wheels, and this seat is mounted on this straight tube.

Put it briefly, a kind of electric wheelchair that this utility model provides for achieving the above object comprises a vehicle frame, and this vehicle frame has a front end and a rear end, and two sides have a pivot end respectively about it; Wheels before a pair of, be positioned at this vehicle frame front end two sides, and its etc. have a wheel seat and a front-wheel before one respectively, should have one first binding end and one second binding end by preceding wheel seat, this first binding end is compared this second binding end near this vehicle frame, the pivot end of this first binding end and this vehicle frame articulates, and this second binding end and this front-wheel connect to be established; One centering wheels, two sides between this vehicle frame front and back ends, and its etc. have in one wheel in the wheel seat and respectively, should have one first link and one second link by middle wheel seat, this first link is compared this second link near wheels before being somebody's turn to do, the pivot end of this first link and this vehicle frame articulates, this second link with should in wheel connect and establish; The pair of rear wheels group is positioned at this vehicle frame rear end two sides; And pair of resilient members, its grade is located at this preceding wheel seat respectively and is somebody's turn to do between the middle wheel seat, this preceding wheel seat is provided and is somebody's turn to do the buffering that relative this vehicle frame pivot of middle wheel seat is put.

In sum, the design of wheels, middle wheels and elastic component three's serial verb construction can replace the preceding wheel seat and be rigidly connected structure and the complicated interlock overhung construction that drive wheel seat of known electric wheelchair before of the present utility model, so that member is more simplified, design production is easy, cost of manufacture is low, the assembling maintenance reaches advantages such as durable easily and have.

Description of drawings

Fig. 1 is the side view of the electric wheelchair of this utility model one preferred embodiment.

Fig. 2 is the preceding wheel seat of the electric wheelchair of the above-mentioned preferred embodiment of this utility model, middle wheel seat and elastic component three's a combination stereogram.

Fig. 3 is the three-dimensional exploded view of Fig. 2.

Sketch map when Fig. 4 travels on flat road surface for the electric wheelchair of above-mentioned preferred embodiment.

Sketch map when Fig. 5 travels on the projection road surface for the front-wheel of the electric wheelchair of above-mentioned preferred embodiment.

Sketch map when Fig. 6 travels on the projection road surface for the middle wheel of the electric wheelchair of above-mentioned preferred embodiment.

The specific embodiment

Fig. 1 to Fig. 6 is the electric wheelchair 100 of this utility model one preferred embodiment, and this electric wheelchair 100 includes a vehicle frame 10, one centering wheels 20, a pair of preceding wheels 30, pair of rear wheels group 40 and pair of resilient members 50, wherein:

This vehicle frame 10 has a front end 10a and a rear end 10b, and two sides extend outwardly respectively and form a pivot end 11 about the vehicle frame 10 front end 10a bottom of present embodiment, and this pivot end 11 is a hollow tube; Again, this vehicle frame 10 is provided with an axial stay pipe 12 in these pivot end 11 rears, establishes a seat group 13 in order to group;

Respectively should in wheels 20 have the middle wheel 22 that wheel seat 21 and in is arranged in wheel seat in this, in present embodiment, wheels 21 are the driving wheels in this, its framework includes a stand 23 and a driving member 24; Please cooperate with reference to Fig. 3, wherein:

This stand 23 has a top board 232 and the base plate 233 that two parallel side plates 231, connect this two side plate 231; Respectively this side plate 231 has a perforation 23a, in present embodiment, this two perforation 23a is the one first hole portion that is positioned at these stand 23 bottoms, first link of wheel seat 21 during this first hole portion constitutes, for the pivot end 11 of this vehicle frame 10 and formation articulate, make this stand 23 relatively these vehicle frame 10 pivots put; Again, the side plate 231 in the outside has three fixing hole 23b; This top board 233 has two axis hole 23c, and this two axis hole 23c constitutes the one second hole portion that is positioned at these stand 23 tops;

This driving member 24 has a mutual group of motor 25 of establishing and a gear-box 26, wherein this gear-box 26 passes those fixing holes 23b by most bolts (figure do not show) and affixed with side plate 231, this gear-box 26 has second link of the middle wheel seat 21 that a power transmission shaft 261 constituted, this power transmission shaft 261 with should in wheel 22 connect and establish, in order to drive should in wheel 22 rotate; This power transmission shaft 26 1 is positioned at perforation 23a rear, so that middle wheel 22 can this pivot end 11 be that fulcrum is toward vehicle frame 10 front end 10a direction pivots pendulum;

Respectively should have the front-wheel 32 that a preceding wheel seat 31 and is arranged in this preceding wheel seat 31 by preceding wheels 30; Should have first binding end that a sleeve pipe 33 is constituted by preceding wheel seat 31, and the wheel carrier 34 that extends toward these vehicle frame 10 the place aheads of this sleeve pipe 33 certainly, these wheel carrier 34 front ends constitute second binding end of this preceding wheel seat 31 and articulate with this front-wheel 32, during assembling, this sleeve pipe 33 is between this two side plate 231, make the pivot end 11 of this vehicle frame 10 be passed the perforation 23a of this two side plate 231 and this sleeve pipe 33 and form with this preceding wheel seat 31 and to articulate, so that be somebody's turn to do preceding wheels 30 this vehicle frame 10 pivots pendulum relatively, again, these wheel carrier 34 middle sections are towards these vehicle frame 10 inboard outstanding bogie side frames 35 that form, and this bogie side frame 35 has one the 3rd hole portion 36;

Respectively these back wheels 40 are fixed in this vehicle frame 10 rear end 10b two sides in present embodiment; Certainly, these back wheels 40 mode that can also articulate is connected with this vehicle frame 10;

Respectively this elastic component 50 is made of a bolster 51 and a compression spring 52 in present embodiment, this bolster 51 has a sleeve 53, a piston 54 and an adjustment part 55, wherein these sleeve 53 1 ends are articulated in the second hole portion (i.e. two axis hole 23c of this top board 232) of wheel seat 21 in this, and stack shell has an external screw thread face 531; These piston 54 1 ends are articulated in the 3rd hole portion 36 of this bogie side frame 35, and end stretches into this sleeve 53 and can move relative to this sleeve 531 in addition; Spiral shell advances or spiral shell moves back but these adjustment part 55 spiral shells are located on the external screw thread face 531 of this sleeve 53, to constitute this sleeve 53 in order to meet the portion that supports to this compression spring 52, two ends of this compression spring 52 are this adjustment part 55 and this piston 54 of contact respectively, with the buffering of wheel seat 21 relative these vehicle frame 10 pivots pendulum in this preceding wheel seat 31 being provided and being somebody's turn to do.

More than be electric wheelchair 100 each member of present embodiment and the explanation of relevant position thereof, the start of then narrating electric wheelchair 100 is in the back:

Please refer to Fig. 5, shown in Figure 6, when the car of riding instead of walk travels when jolting the road surface, with the thrust on the road surface 101 is example, the front-wheel 32 of car 100 of riding instead of walk can contact with this thrust 101 earlier, at this moment, continue to be subjected to the propelling of wheel 22 in this because of car body, so the preceding wheel seat 31 of these preceding wheels 30 will be that fulcrum upwards lifts with the pivot end 11 of this vehicle frame 10, climb up this thrust 101 to drive this front-wheel 32, and affect this elastic component 50 upwards to lift simultaneously, piston 54 will stretch into sleeve 53 and push this compression spring 52 this moment, be subjected to thrust 101 ballistic energy to absorb front-wheel 32, and the concussion when suppressing bounce-back after these compression spring 52 shock-absorbings, with the impact that slows down bounce-back and the balance of maintenance vehicle body, and, should in wheel seat 21 also the gesture of the bottom will be arranged by these elastic component 50 interlocks, make in this wheel 22 and this front-wheel 32 are closely against the road surface simultaneously, to keep vehicle body steady, and the earth-grasping force of wheel 22 in can increasing, wheel 22 is made smooth advances in making; When front-wheel 32 is climbed up this thrust 101 by this thrust 101 and middle wheel 22 (with reference to Fig. 6), middle wheel seat 21 will upwards lift, and by this elastic component 50 absorb should in wheel 22 be subjected to these thrust 101 ballistic energy and interlock should before wheels 30 downward pivots put, make front-wheel 32 be tight against the road surface, to keep vehicle body steady, promote the comfortableness of driver on taking.

What another was carried is that user can to adjust the elastic force of this compression spring 52, with in response to different drivers and driving road conditions, still be possessed best stationarity by the adjustment part 55 on moving this bolster 51 of spiral shell when this electric wheelchair 100 is travelled.

From the above, this utility model is by the pivot end 11 that preceding wheel seat 31 and middle wheel seat 21 is hubbed at vehicle frame 10 respectively, to improve known preceding wheel seat and to drive the existing disappearance of the banded rigid structure of wheel seat one, and this utility model is provided with an elastic component 50 between this preceding wheel seat 31 and middle wheel seat 21, with provide this preceding wheel seat 31 and should in the buffering of relative this vehicle frame 10 pivots pendulum of wheel seat 21, and need not as between the preceding wheel seat of the known car of riding instead of walk and the driving wheel seat in the mode of the mutual interlock of linked component of complexity; Electric wheelchair 100 of the present utility model has the member exquisiteness, is designing under the prerequisite of advantages such as producing easily, cost of manufacture is low, the assembling maintenance is easy and durable, still but smooth-ride is on the road surface of jolting, and this elastic component 50 is not direct contact or close this seat group 13, therefore, this elastic component 50 can be before shaking force be passed to vehicle frame 10 nearly seat groups 13, be about to this shaking force fast Absorption, drive the comfortableness of taking to increase.

Certainly, electric wheelchair of the present utility model is not limited to middle wheel drive, also can be front-wheel or rear wheel drive; And, connection relationship between the elastic component of present embodiment, preceding wheels and the middle wheels three also can be applicable between back wheels and the middle wheels, and elastic component also can be selected the spring of other form for use, (Torsion spring) is example with torque spring, one end of this torque spring can connect and be butted on this preceding wheel seat, another termination is butted on wheel seat in this, so not only can absorb impulsive force and preceding wheel seat of interlock and middle wheel seat by this torque spring equally, and member will be simplified more on forming.

The above only is a preferable possible embodiments of the present utility model, uses the equivalent structure variation that this utility model description and claim scope are done such as, ought to be included in the claim scope of the present utility model.

Claims

1. an electric wheelchair is characterized in that, comprises:

Pair of resilient members, it is located at this preceding wheel seat respectively and is somebody's turn to do between the middle wheel seat, is this preceding wheel seat and the buffering of being somebody's turn to do relative this vehicle frame pivot pendulum of middle wheel seat.

2. electric wheelchair as claimed in claim 1 is characterized in that, wherein respectively two ends of this elastic component reach and should middle wheel seat activity articulate with this preceding wheel seat respectively.

3. electric wheelchair as claimed in claim 1, it is characterized in that, wherein should comprise a stand and a driving member by middle wheel seat, this first link is the one first hole portion that is formed at this stand, the pivot end of this vehicle frame is a body, this body passes this first hole portion and forms with this stand and to articulate, and passes this first binding end and form with this preceding wheel seat and to articulate; This driving member is fixed on this stand, and has a power transmission shaft, this power transmission shaft constitute this second link and with this in take turns and be coupling.

4. electric wheelchair as claimed in claim 3, it is characterized in that, wherein should between this first link and this second link, be provided with one second hole portion by middle wheel seat, should be provided with one the 3rd hole portion by preceding wheel seat between this first binding end and this second binding end, two ends of this elastic component are arranged in this second hole portion and the 3rd hole portion respectively.

5. electric wheelchair as claimed in claim 4, it is characterized in that, wherein this stand has two parallel side plates and a top board that is connected this two side plate, respectively this side plate has a perforation, this two perforation constitutes the first hole portion of this stand, this driving member and at least one this side plate are affixed, this top board has two parallel axis holes, this two axis hole constitutes the second hole portion of this stand, should have a sleeve pipe between this two side plate by preceding wheel seat, this sleeve pipe constitutes this first binding end, and the pivot end of this vehicle frame passes this two perforation and this sleeve pipe.

6. electric wheelchair as claimed in claim 5, it is characterized in that, wherein should have wheel carrier telescopic joint and that extend towards this vehicle frame the place ahead by preceding wheel seat with this, this wheel carrier front end constitutes this second binding end and connects with this front-wheel to be established, and this wheel carrier is outstanding between this first, second binding end to be formed with a bogie side frame, and this bogie side frame has the 3rd hole portion.

7. electric wheelchair as claimed in claim 2, it is characterized in that, wherein respectively this elastic component has a bolster and a compression spring, this bolster has a sleeve and a piston, this sleeve one end is articulated in wheel seat in this, and has one to portion, and this piston one end is articulated in this preceding wheel seat, end stretches into this sleeve and can move relative to this sleeve in addition, and two ends of this compression spring are this telescopic portion and this piston of supporting of contact respectively.

8. electric wheelchair as claimed in claim 7 is characterized in that, wherein this sleeve has an external screw thread face, and this bolster has an adjustment part, and spiral shell advances or spiral shell moves back but this adjustment part spiral shell is located on this telescopic external screw thread face, and this adjustment part constitutes the portion that should support.

9. electric wheelchair as claimed in claim 1 is characterized in that, comprises a seat group, and this vehicle frame is provided with an axial stay pipe between its front and back ends, and this stay pipe is compared the pivot end of this vehicle frame near these back wheels, and this seat is mounted on this straight tube.