CN2119911U

CN2119911U - Electric wheelchair

Info

Publication number: CN2119911U
Application number: CN 92205826
Authority: CN
Inventors: 陈万利
Original assignee: Runsheng Enterprise Co ltd
Current assignee: Runsheng Enterprise Co ltd
Priority date: 1992-03-28
Filing date: 1992-03-28
Publication date: 1992-10-28

Abstract

The utility model is mainly and respectively provided with a driving wheel on two corresponding sides of the center of a base of a wheelchair, and is respectively provided with a free wheel on the front and the back sides of the center. The phase of a power supply is supplied through the change of the direction of a steering control rod, and the power supply is conveyed to direct-current electromotors which are arranged on both sides of the center of the base and are respectively connected with two driving wheels to make the electromotor turn forward or reversely, and drive a reduction gear connected with each direct-current electromotor. Therefore, the wheelchair drives the driving wheel to be connected with the reduction gear by means of the power output from the output terminal of the reduction gear, to make the wheelchair move forward or backward, or uses the center of the base as a rotating center to rotate by the minimum rotating radius.

Description

Electric wheelchair

This utility model relates to a kind of power wheel middle electric wheelchair, relate to a kind of two respective side more precisely drivewheel is set respectively in the seat support chassis of wheelchair central part, with rotation by means of the d.c. motor that is connected with each drivewheel of control, provide drivewheel to rotate the power of institute's palpus, make wheelchair under the radius of turn of minimum, finish the purpose of running break-in.

Rotating mechanism according to the various wheelchair of routine, as shown in Figure 1, general all is two respective side that drivewheel 31 are arranged at wheel seat base 32 trailing edges respectively, and in the two bottom sides of the leading edge locus of this base one freewheel 33 is set respectively: the rotating mechanism of this wheelchair makes it when doing the rotation running, required radius of turn is bigger, so, be unsuitable in narrower activity space, finishing spinning movement, in addition, because this wheelchair is when doing rotation, the center of its deviation of gravity center radius of turn is quite far away, so, when wheelchair rotates, will produce the phenomenon of wagging the tail of big radian, this not only big spoke has reduced this wheelchair stability when rotated, also is an impediment to the activity of wheelchair.

Main purpose of the present utility model provides a kind of power wheel middle electric wheelchair with minimum radius of turn, this wheelchair be by means of two respective side of its seat support chassis central part the drivewheel that is provided with respectively, and the freewheel that is provided with respectively in the front and rear edge bottom on this chassis, make wheelchair when rotated, can with the central part on this chassis the rotation that rotary middle point is made minimum radius of turn, so, in narrow activity space, still have great slewability.

Secondary objective of the present utility model provides a kind of two electric DC motors independently that utilize, drive respectively wheelchair seat support chassis central part two respective side the drivewheel that is provided with respectively, so that power to be provided, make two drivewheels can produce forward or reverse rotation respectively, make wheelchair following, the motion that can in minimum radius of turn, do break-in rapidly, advance or retreat assisting of power.

Another purpose of the present utility model is with the central part of the position of centre of gravity of seat support design on the seat support chassis of wheelchair, when making the rotation of this wheelchair, its center of gravity remains near the central part that is projected in the seat support chassis, promptly near the central point of radius of turn, so, wheelchair is when rotating, the central point that its position of centre of gravity of reason is not excessively departed from radius of turn, and produce the phenomenon of wagging the tail, so, the stability that this wheelchair rotates break-in can effectively be improved.

Fig. 1 is the floor map of rotating mechanism on the seat support chassis of conventional wheelchair;

Fig. 2 is the exploded view of this utility model embodiment;

Fig. 3 is the floor map of rotating mechanism on the seat support chassis of this utility model embodiment;

Fig. 4 is the upright figure of the group of this utility model embodiment.

Consult shown in the accompanying drawing 2,3, this utility model is a kind of power wheel middle electric wheelchair structure, mainly comprises elements such as chair body 1, chair body back shaft 2, freewheel 3,4, drivewheel 5,6,

electric DC motor

9,10, reduction gearing 11,12, seat support chassis 14, battery 13, charging device 15 and chassis lid 10; Wherein two respective side of these seat support chassis 14 central parts are provided with a drivewheel 5,6 respectively, and the root edge of the front and back respective side of these chassis 14 central parts then is provided with a freewheel 3,4 respectively; This freewheel 3,4 is connected with the one group of reduction gearing 11,12 and a direct current electro-

motor

9,10 of back shaft 2 both sides of being located at these chassis 14 central parts respectively, this

electric DC motor

9,10 also is connected with charging battery 13 on being installed in this chassis 14, drives the required electric power of reduction gearing 11,12 and drivewheel 5,6 to provide by means of this charging battery 13; Again, the close position of this charging battery 13 is provided with a charging device 15, so that this accumulator 13 can be connected with power supply by this charging device 15 in power shortage or when exhausting, holds required electric power fully for accumulator 13; In addition, 14 central part place at the bottom of this seat support is installed with a chair body back shaft 2, and these back shaft 2 top flanges 17 are provided with a plurality of screws 18, so that user is required by means of the screw 19 or chair body liked 1 locking is on it; The top on this seat support chassis 14 is provided with a chassis lid 16 in addition, the trailing edge on the trailing edge of this chassis lid 16 and chassis 14 is articulated, its leading edge then opens and closes frame 23 by one and is articulated with this chassis, the top of its central part, offer a hole 20, back shaft 2 for chair body 1 is just wherein penetrable, and chair body 1 is locked on this back shaft 2; This chair handrail 21 positions on one's body are provided with a control stick 22, this control stick 22 is to be connected with two

electric DC motors

9,10 respectively by the power line (not shown), the power supply positive-negative phase of this

electric DC motor

9,10 changes to utilize these control stick 22 controls to supply with respectively, make respectively this

electric DC motor

9,10 do just reverse rotation respectively, to make wheelchair be accomplished advancing, retreat the action of rotation and break-in.

When operation, user is by controlling control stick 22 set on the chair body handrail 21, order supply electric power is just producing, minus phase changes, and send through the sub power source line supplementary biography and to give the set electric DC motor 9 in 14 central part both sides, seat support chassis, 10, the electric power that this two electric DC motor can be complied with supplied just, minus phase changes does forward or negative sense rotation, and with this rotational power on it the reduction gearing 11 that connect to be provided with respectively, 12, transfer to and this reduction gearing 11 respectively, 12 drivewheels that connected 5,6, make respectively this drivewheel 5,6 do forward or reverse rotation respectively according to indication, the action that makes wheelchair finish advancing or retreat, and the central part that is able to wheelchair is the central point of rotation, as shown in Figure 4, in the radius of turn scope of minimum, finish rotation break-in action.

In addition, each element of the present utility model is when being installed on seat support chassis 14, also make the proper projection in position of center of gravity of its monolithic wheel chair apparatus contiguous in the central part on this chassis 14 or its, so that this wheelchair when rotated, the central point of reason deviation of gravity center radius of turn produces the phenomenon of wagging the tail, so the degree of stability when the spoke degree improves this wheelchair and rotates greatly.

The above only is one of best specific embodiment of this utility model, structural feature of the present utility model is not limited thereto, and any technical staff who is familiar with this technology is in this utility model field, can think easily and the equivalence variation, should all belong to and not break away from characteristic range of the present utility model.

Claims

1, a kind of power wheel middle electric wheelchair mainly comprises elements such as a chair body back shaft, two freewheels, two drivewheels, two electric DC motors, two reduction gear boxes and a seat support chassis, it is characterized in that:

The central part place on this seat support chassis vertically is installed with a chair body back shaft, this back shaft is respectively arranged with one group of electric DC motor and reduction gearing on the two adjacent side positions on this chassis, this electric DC motor is connected with this reduction gear box and is integral, the outfan of this reduction gearing then is connected with the set drivewheel of this chassis central part lateral margin, again, the front and back side root edge of this seat support chassis central part then is respectively equipped with a freewheel.

2, a kind of power wheel middle electric wheelchair as claimed in claim 1 is characterized in that: this chair body back shaft top is provided with flange, and this flange is provided with screw, so that be integral to lock with chair body bottom for saturating this screw of screw.

3, a kind of power wheel middle electric wheelchair as claimed in claim 2, it is characterized in that: can be provided with a control stick or a plurality of button on the handrail of chair body, to change the phase place of supplying power supply by means of controlling this control stick or button, and by power line it is delivered to two electric DC motors respectively, with control respectively this two drivewheel just or reverse.

4, a kind of power wheel middle electric wheelchair as claimed in claim 1, it is characterized in that: this electric DC motor can be connected with a charging device and battery, to reach the additional required electric power of described electric DC motor that drives by this charging device and battery supplied.

5, a kind of power wheel middle electric wheelchair as claimed in claim 1, it is characterized in that: on this seat support chassis a chassis lid can be set, to be covered in the upper surface of whole chassis, this lid end face is provided with a perforate, so that penetrate wherein for this chair body back shaft.