CN201375623Y

CN201375623Y - Electric wheelchair

Info

Publication number: CN201375623Y
Application number: CN 200920003511
Authority: CN
Inventors: 师建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-14
Filing date: 2009-01-14
Publication date: 2010-01-06
Anticipated expiration: 2019-01-14

Abstract

The utility model relates to a wheelchair driven by electricity, in particular to a wheelchair which is driven by storage batteries and used for disabled people and people incapable of walking by the leg. The wheelchair consists of a vehicle frame, a chair, two back load bearing wheels, two front guide wheels, a battery, a motor, a steering device and a motor controller, wherein the planes of the front guide wheels can freely rotate; the front guide wheels can freely rotate around the axial line parallel to the planes of the wheels; one back load bearing wheel and one front guide wheel are electrically driven wheels; and in addition, the front guide wheel which is electrically driven is provided with the steering device.

Description

A kind of electric wheelchair

Technical field

It is electrically driven (operated) that this utility model relates to a kind of usefulness, particularly use battery-driven, the wheelchair that has obstacle to use for people with disability and action.Two front jockey wheels, battery, motor, transfer and motor control assemblies that wheelchair of the present utility model can be rotated arbitrarily by BOGEY WHEEL, wheel plane behind the vehicle frame, seat, two are formed, wherein front jockey wheel can rotate the just common universal deflecting roller of saying arbitrarily around being parallel to the planar axis of wheel.

Background technology

The comparatively common relative maturation with technology of driving device is to adopt gear drive and adopt box of tricks in the electric wheelchair, as Chinese invention patent 01145209.9 disclosed a kind of electrodynamic type wheelchair, wherein comprise wheel Wheel-chair and electric device, wheelchair one side handrail the place ahead dress breeches pipe, adorn turning-bar in the breeches pipe, joystick is established in the turning-bar upper end, the lower end is connected with the steamboat front fork; The direct current generator of electric device has been contained in the turning-bar steamboat wheel hub, and the crawl gauge tap is located on the joystick, and charger, battery panel are contained in the electric cabinet at wheelchair rear portion.Though this wheelchair result of use is reliable, its actuating device adopts the gear drive that has differential attachment, and its structure is comparatively complicated, and manufacturing cost is also higher.Drive the machine driving that replaces the gear class for addressing this problem in recent years wheel hub motors that adopted more, turn to the driving wheel speed discrepancy that causes for solving wheelchair, the electronic-controlled installation of passing through is also arranged in the prior art, promptly adopt electronics to pitch the technical scheme of fast device, for example existing more of home make high gear wheelchairs, perhaps some high-grade wheelchairs of import now, Chinese ordinary consumer can not accept but the electronic-controlled installation cost of this class wheelchair remains.China's utility model patent 00234457.2 disclosed electric wheelchair structure comprises wheel Wheel-chair and electric device, and wheelchair one side handrail the place ahead dress breeches pipe is adorned turning-bar in the breeches pipe, and joystick is established in the turning-bar upper end, the lower end is connected with the steamboat front fork; The direct current generator of electric device has been contained in the turning-bar steamboat wheel hub, and the crawl gauge tap is located on the joystick, and charger, battery panel are contained in the electric cabinet at wheelchair rear portion.This wheelchair is electrically driven (operated) to be the steamboat that turning-bar is housed, just driven is the front jockey wheel of being said usually, similarly more in the prior art with the technical scheme of motor-driven front jockey wheel, but because this class wheelchair load is mainly by BOGEY WHEEL, just the bull wheel of existing wheelchair bears, therefore the normal pressure that acts on the directive wheel is less, this has caused driving wheel frictional force deficiency, make this wheelchair handling capacity extreme difference, when motion, its efficient is extremely low when divertical motion especially, and existing this electric driving wheel chair is almost without any climbing capacity, the slopes that require electric wheelchair should be able to ascend 8 degree according to national standard, and in fact existing this class to be the wheelchair of driving wheel with the front jockey wheel showing also unusual difficulty of wet and slippery ground motion slightly, and powerless especially to the road surface that a gradient is arranged slightly.

Summary of the invention

This utility model provides a kind of prior art deficiency that overcomes, and both can reduce cost, and need not to adopt comparatively expensive machinery to pitch fast mechanism or electronic-controlled installation again, and the electric driving wheel chair of handling capacity and climbing capacity preferably can be arranged.

This utility model is that two wheels in four wheels of existing wheelchair are made electrically driven wheel, be about to one after BOGEY WHEEL and a front jockey wheel be set to electrically driven wheel, and on electrically driven (operated) front jockey wheel, transfer is set.Two electrically driven wheels of the present utility model can be arranged on the same side.

A BOGEY WHEEL and a front jockey wheel that is positioned at offside after its electrically driven (operated) two wheels preferably are one respectively in the most preferred embodiment of the present utility model.

Front jockey wheel adopts wheel hub motor to drive in the most preferred embodiment of this utility model electric wheelchair.

Electric wheelchair of the present utility model, its electrically driven (operated) front jockey wheel is fixed on the steering fork, and on steering fork, be fixed with turning-bar, turning-bar is provided with a control device according to turning-bar rotational angle control back load-bearing wheel speed, when turning-bar rotates and rotational angle during less than first design angle to electrically driven (operated) back BOGEY WHEEL side, the rotating speed of back BOGEY WHEEL is constant, when turning-bar to electrically driven (operated) back BOGEY WHEEL side rotate and when the turning-bar rotational angle greater than the first design angle degree during less than second design angle after the load-bearing wheel speed be zero, when turning-bar rotates and when turning-bar rotation rotational angle during greater than second design angle, back BOGEY WHEEL backward rotation to electrically driven (operated) back BOGEY WHEEL side; When turning-bar electrically driven (operated) back load-bearing wheel speed when non-electrically driven (operated) back BOGEY WHEEL side is rotated does not change.

This utility model is because BOGEY WHEEL and front jockey wheel driving after adopting, be driven the wheel and ground between frictional force much larger than prior art, therefore can overcome fully that prior art exists because of only driving front jockey wheel, make frictional force too small and cause the deficiency of capacity of road difference; Also overcome in the prior art and to drive the back BOGEY WHEEL and need box of tricks, caused its complex structure, the deficiency that cost is too high.According to the test of reality, wheelchair of the present utility model moves on wet and slippery ground and is not subjected to any obstruction, and can be evenly by 12 slopes of spending.

When in the wheelchair of the present utility model electrically driven (operated) be one after BOGEY WHEEL and be a front jockey wheel of diagonal position with it, when brake, can avoid taking place the phenomenon of sideslip.

This utility model is arranged to wheel hub motor with electrically driven (operated) front jockey wheel and is driven, and the structure of whole wheelchair is more simplified, and particularly can avoid influences the deficiency that this front jockey wheel rotates greatly because of the drive mechanism volume of other type.

This utility model is pressed: its electrically driven (operated) front jockey wheel is fixed on the steering fork, and on steering fork, be fixed with turning-bar, turning-bar is provided with a control device setting according to turning-bar rotational angle control back load-bearing wheel speed, and when turning-bar rotational angle during less than first design angle, the rotating speed of back BOGEY WHEEL is constant, when the turning-bar rotational angle greater than first design angle during less than second design angle after the load-bearing wheel speed be zero, when turning-bar rotational angle during greater than second design angle, back BOGEY WHEEL backward rotation, can make wheelchair that best turning effect is arranged like this, particularly can when a direction is turned, realize the original place rotation.

This utility model structure is very simple, does not need complicated steering mechanism, does not also need to pitch steady, the proper motion that fast mechanism can realize wheelchair as the complexity of prior art.In addition, this utility model is also had a manoeuvrable, reliable advantage.

Description of drawings

Fig. 1 is the sketch map of wheelchair head-down position of the present utility model, Fig. 2 is the upward view of Fig. 1, Fig. 3 is the vertical view of Fig. 1, Fig. 4 is the sketch map of deflecting roller (just by a power-actuated front jockey wheel) assembly of wheelchair of the present utility model, and it has comprised front jockey wheel, steering arm, steering handle and can control the devices such as switch of back load-bearing wheel speed according to the turning-bar rotational angle.

The specific embodiment

Accompanying drawing provides most preferred embodiment of the present utility model, below in conjunction with accompanying drawing this utility model is carried out detailed explanation:

Referring to Fig. 1 to 4, this utility model is by vehicle frame, is installed on seat 6 on the vehicle frame, has the back backrest 3 of handle, pedal 5 and front jockey wheel 10, back BOGEY WHEEL 7 constitutes, and two front jockey wheels 10 respectively are installed on respectively on the universal bogie, can make the plane of wheel 10 do the rotations of 360 degree.These mechanisms almost are identical with prior art.But, one of them BOGEY WHEEL in this utility model (being the wheel that indicates 7b that is arranged in the lower right side among Fig. 1) and be respectively electrically driven (operated) wheel with the front jockey wheel (Fig. 1 upper left side indicates the wheel of 10a) of its offside, wherein front jockey wheel 10a is the wheel of belt wheel hub motor.On the BOGEY WHEEL 7b of back, be fixed with the installing plate 8 that motor and reducing gear are set, also can directly adopt wheel hub motor directly to drive back BOGEY WHEEL 7b certainly, so can form another embodiment of the present utility model.In vehicle frame, be positioned at under-seat and be provided with battery case 11, also be provided with the electric control box 16 and the parts 15 that are used for fixing control box 16 of wheelchair.Be fixed with a turning-bar 14 on electrically driven (operated) front jockey wheel 10a steering fork 12, the top of turning-bar 14 has a bandy control handle 4, constitutes transfer.This handle 4 has adopted the electric bicycle control handle of existing market sale in embodiment of the present utility model, and by the control of this electric bicycle control handle realization to the wheelchair actuating speed.Be also shown in from Fig. 4 in addition, on turning-bar 14, also be provided with the control device that constitutes by

assembly

18 and 19 according to turning-bar rotational angle control back load-bearing wheel speed, among the embodiment of the present utility model be directly with the electric bicycle control of existing market sale in control element change the outfit on turning-bar 14.For making drawing succinct, do not represent being connected of handle 4 and

assembly

18,19 formations in the accompanying drawings according to the control device of turning-bar rotational angle control back load-bearing wheel speed and the electric wiring of 16 of electric control box.

In the present embodiment, adopt the electric bicycle drive motors of 250W and 120W to drive back BOGEY WHEEL 7b and front jockey wheel 10a respectively, and the motor of the used 120W of front jockey wheel is a wheel hub motor.First design angle of determining in this embodiment is 45 degree in addition, second design angle is 60 degree, when the turning-bar rotational angle is spent less than 45, setting back BOGEY WHEEL 7b rotating speed does not change, when the turning-bar rotational angle is spent less than 60 greater than 45 degree, the speed setting of back BOGEY WHEEL 7b is zero, and when when the turning-bar rotational angle is spent greater than 60, the speed setting of back BOGEY WHEEL 7b is reversing.

The ruuning situation of present embodiment is as follows: when keeping straight on, protection turning-bar 14 is in the position of not rotating, and at this moment wheelchair travels forward under the effect of front jockey wheel 10a and back BOGEY WHEEL 7b, can change the speed that wheelchair moves by turning handle 4 simultaneously; During swing handle 4, wheelchair promptly produces steering moment to the right, and wheelchair is turned right along clockwise direction; Counterclockwise during swing handle 4, wheelchair promptly produces steering moment left, and wheelchair is turned left, and: the turning-bar rotational angle is during less than 45 angles, and the rotating speed of back BOGEY WHEEL is constant, and the center of rotation of this moment roughly is positioned at non-electrically driven (operated) BOGEY WHEEL place afterwards; The load-bearing wheel speed is zero after when the turning-bar rotational angle is spent less than 60 greater than 45 angles, and this moment, center position was roughly still at BOGEY WHEEL place, non-electrically driven (operated) back; When the turning-bar rotational angle is spent greater than 60, back BOGEY WHEEL backward rotation, this moment center of rotation roughly in the center of seat, can realize that the wheelchair original place spins.

Actual test result is, the wheelchair of present embodiment can be crossed the slope of 12 degree very like a cork, on wet and slippery road surface without any difficulty in walking, and be that two motors of 250W are when only driving front jockey wheel with power, it is the situation of the wheelchair of prior art, on wet and slippery ground, can't normally walk at all, can not cross slope less than 8 degree.And show that through experiment and Theoretical Calculation the drive motors power of the required usefulness of this utility model can be more a little bit smaller, but can't do further test because of the restriction that is subjected to condition.

Claims

1, a kind of electric wheelchair, form by two front jockey wheels, battery, motor, transfer and motor control assemblies that BOGEY WHEEL, wheel plane behind the vehicle frame, seat, two can be rotated arbitrarily, BOGEY WHEEL and a front jockey wheel are electrically driven wheel after it is characterized in that one, and electrically driven (operated) front jockey wheel is provided with transfer.

2, a kind of electric wheelchair according to claim 1 is characterized in that electrically driven (operated) two wheels are respectively BOGEY WHEELs and a front jockey wheel that is positioned at offside after.

3, a kind of electric wheelchair according to claim 2 is characterized in that front jockey wheel adopts wheel hub motor to drive.

4, according to claim 2 or 3 described a kind of electric wheelchairs, it is characterized in that electrically driven (operated) front jockey wheel is fixed on the steering fork, and on steering fork, being fixed with turning-bar, turning-bar is provided with a control device according to turning-bar rotational angle control back load-bearing wheel speed.