CN202505628U

CN202505628U - Engaging and disengaging type electrically powered wheelchair driver

Info

Publication number: CN202505628U
Application number: CN2012200187654U
Authority: CN
Inventors: 周拥军
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-16
Filing date: 2012-01-16
Publication date: 2012-10-31
Anticipated expiration: 2022-01-16

Abstract

The utility model discloses an engaging and disengaging type electrically powered wheelchair driver which comprises a motor and a reduction box, wherein a connecting rod, an output shaft and a worm wheel are arranged in the reduction box; the output shaft adopts a hollow structure; the output shaft is movably sheathed with the worm wheel; the worm wheel is meshed with a worm connected with a motor shaft; the connecting rod is glidingly sheathed in the output shaft; a flat key is movably installed at one end of the connecting rod; a through groove for the flat key to move is correspondingly formed on the output shaft; the flat key penetrates through the through groove and is in key connection with worm wheel; the other end of the connecting rod is exposed to the exterior of the output shaft and connected with a handle; the connecting rod is connected with an elastic mechanism enabling the flat key to be propped against the interior of a key groove of the worm wheel; a positioning pin is vertically arranged on the side wall of the connecting rod; and a limiting mechanism for limiting the positioning pin is arranged on the output shaft. When the driver is required to be switched into a manual mode, a spring is compressed under the effect of external force, so that the flat key is separated from the key groove on the worm wheel, the rotation of the output shaft does not drive the worm wheel, the worm and the motor to be operated at the same time, and the driver is labor-saving when being operated in the manual mode.

Description

But a kind of disengaging type electric wheelchair driver

Technical field

This utility model relates to electric wheelchair, but particularly relates to a kind of disengaging type electric wheelchair driver.

Background technology

Mostly electric wheelchair on the existing market is pure electrodynamic type; Be to be difficult to manually promote under the situation that does not have electricity; Because it will drive worm and gear and motor rotates simultaneously, efficient is low during the worm and gear engagement will drive motor rotation cutting magnetic line in addition, so will there be very big thrust to overcome the resistance that when wheel rotates, produces; So the people will be very tired when manual state, that also is irrational naturally.

The also light-weight electric wheelchair Drive Structure of some disengaging type on the market in addition; But complex structure, difficult installation, manufacturing cost height; Do not reach the effect of torch one lightweight wheelchair driver, so do not accepted by market, that can not win client's favor naturally.

Summary of the invention

This utility model is to the deficiency that exists in the above-mentioned prior art; Provide a kind of function can satisfy pure electronic and manual two states; When the wheel Wheel-chair maybe need switch to manual state when not having electricity, only need separate clutch can easily realize, and when manual state is worked labour-saving electric wheelchair driver very.

The technical scheme of this utility model is achieved in that

But a kind of disengaging type electric wheelchair driver comprises motor, reduction box, in reduction box, is provided with connecting rod, output shaft and worm gear; Output shaft is a hollow core structures, described output shaft and worm gear pivot bush unit, worm gear and the worm engaging that is connected motor shaft; The connecting rod slip cap is connected in the output shaft, and flat key is equipped with in an end activity of connecting rod, the corresponding groove that supplies flat key to move that has on output shaft; Flat key passes groove and is connected with the worm gear key; The other end of connecting rod exposes outside the output shaft and is connected with handle, and described connecting rod is connected with and makes flat key be against the elastic body in the worm gear keyway, on link sidewalls, vertically is provided with alignment pin; Described alignment pin is slidingly arranged in the chute on the output shaft inner hole wall, on output shaft, is provided with alignment pin is carried out spacing position-limit mechanism.

As preferably; Described connecting rod is divided into two sections on thin bar, thick bar, and the endoporus of output shaft is equipped with steady pin increase the formation step near handle place diameter on step; Described elastic body comprises spring; Spring housing is located on the thin bar, and an end and the steady pin of spring offset, and the other end of spring offsets with thick bar.

As preferably, described position-limit mechanism is the draw-in groove that is arranged on the output shaft inner hole wall, and described draw-in groove and chute are perpendicular, and an end of draw-in groove links to each other with this end near handle of chute.

As preferably, described chute, draw-in groove are groove, and alignment pin is exposed to outside the chute.

Adopted the principle and the beneficial effect of this utility model of technique scheme to be:

The characteristics of this utility model are: worm gear is installed on the output shaft and is slidingly matched with axle, and the axle center is opened groove and flat key is installed and relies on telescopic spring and worm gear cooperating.

When the wheel Wheel-chair during in the work of pure motoring condition spring press flat key and itself and keyway on the worm gear be connected with output shaft be integrally formed, thereby promptly be exactly the drive worm gear realization driver drives that works asynchronously with output shaft when the driven by motor worm screw is worked.

When needs switch to manual state, thereby spring is shunk make flat key to separate with keyway on the worm gear, worm gear was static relatively when output shaft rotated; Worm gear is only with its worm engaging but do not work; That is to say that the output shaft rotation does not drive worm and gear and motor is worked simultaneously, and its mate and output shaft are thrown off fully when the moving state of wheelchair driver was worked; That is naturally because of engagement and resistance that cutting magnetic line produced, so very laborsaving naturally during manual state work.

The utlity model has simple in structure, light, production cost is low, the torch one is switched freely, meets the requirement of market to lightweight electric wheelchair driver, can cater to market and produce bigger economic benefit social benefit.

Description of drawings

Fig. 1 is the structural representation of this utility model change speed gear box;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the syndeton sketch map of connecting rod, output shaft and worm gear;

Fig. 4 is the syndeton sketch map of connecting rod and output shaft;

Fig. 5 is the connecting rod of another angle and the syndeton sketch map of output shaft.

The specific embodiment

The specific embodiment of the present invention is following:

Embodiment: but a kind of disengaging type electric wheelchair driver shown in Fig. 1～5, comprises motor 1, reduction box 2; In reduction box 2, be provided with connecting rod 3, output shaft 4 and worm gear 5, output shaft 4 is a hollow core structures, described output shaft 4 and worm gear 5 pivot bush units; Worm gear 5 and the worm screw that is connected motor shaft 6 engagements, connecting rod 3 slip caps are connected in the output shaft 4, and flat key 7 is equipped with in an end activity of connecting rod 3; The corresponding groove 8 that supplies flat key 7 to move that has on output shaft 4, flat key 7 passes groove 8 and is connected with worm gear 5 keys, and the other end of connecting rod 3 exposes outside the output shaft 4 and is connected with handle 9; Described connecting rod 3 is connected with and makes flat key 7 be against the elastic body in the worm gear keyway, and described connecting rod 3 is divided into 11 two sections on thin bar 10, thick bar, and the endoporus of output shaft 4 forms step 12 increasing near handle 9 places' diameters; Steady pin 13 is housed on step 12, and described elastic body comprises spring 14, and spring 14 is set on the thin bar 10; One end and the steady pin 13 of spring 14 offset, and the other end of spring 14 offsets with thick bar 11.

On connecting rod 3 sidewalls, vertically be provided with alignment pin 15, described alignment pin 15 is slidingly arranged in the chute 16 on output shaft 4 inner hole walls, on output shaft 4, is provided with alignment pin 15 is carried out spacing position-limit mechanism; Described position-limit mechanism is the draw-in groove 17 that is arranged on output shaft 4 inner hole walls, and described draw-in groove 17 is perpendicular with chute 16, and an end of draw-in groove 17 links to each other with this end near handle 9 of chute 16; Described chute 16, draw-in groove 17 are groove, and alignment pin 15 is exposed to outside chute 16, the draw-in groove 17.

The work process of this utility model electric wheelchair driver is following:

(1), when driver was in pure electronic work, the flat key 7 on the connecting rod 3 was filled in the keyway of worm gear 5 under the effect of spring 14; The relative length of spring 14 extends the longest; Make connecting rod 3 and output shaft 4, worm gear 5 form an integral body like this, when working under the drive of worm screw 6 at motor, start working with the worm gear 5 of its engagement; Realize driving thereby drive the running of this overall operation, show as the output shaft running of starting working outside.

(2); When driver is in manual state when work, spur handle 9 under external force, the alignment pin on the connecting rod 3 15 is moved to the end and rotary handle 9 is stuck in the draw-in groove 17 of output shaft 4 alignment pin 15 along chute 16; Make spring 14 be contracted to the shortest relatively position; Flat key 7 on the connecting rod 3 separates with worm gear 5, when motor does not drive worm screw 6 with worm gear 5 work, under the effect of output shaft in given external force, can rotate freely; Not separated fully by the influence of inner engagement, thereby realize manual function with it.

The utility model has the advantages that: it can realize torch one function; Especially drive system is separated with output shaft fully when manual state is worked; Not because of the resistance that meshes and cutting magnetic line produced; Laborsaving and simple in structure, light during promotion, production cost is low, is the lightweight electric wheelchair driver of a practicality.

Claims

1. but a disengaging type electric wheelchair driver is characterized in that: comprise motor, reduction box, in reduction box, be provided with connecting rod, output shaft and worm gear; Output shaft is a hollow core structures, described output shaft and worm gear pivot bush unit, worm gear and the worm engaging that is connected motor shaft; The connecting rod slip cap is connected in the output shaft, and flat key is equipped with in an end activity of connecting rod, the corresponding groove that supplies flat key to move that has on output shaft; Flat key passes groove and is connected with the worm gear key; The other end of connecting rod exposes outside the output shaft and is connected with handle, and described connecting rod is connected with and makes flat key be against the elastic body in the worm gear keyway, on link sidewalls, vertically is provided with alignment pin; Described alignment pin is slidingly arranged in the chute on the output shaft inner hole wall, on output shaft, is provided with alignment pin is carried out spacing position-limit mechanism.

2. but a kind of disengaging type electric wheelchair driver according to claim 1; It is characterized in that: described connecting rod is divided into two sections on thin bar, thick bar, and the endoporus of output shaft is equipped with steady pin increase the formation step near handle place diameter on step; Described elastic body comprises spring; Spring housing is located on the thin bar, and an end and the steady pin of spring offset, and the other end of spring offsets with thick bar.

3. but a kind of disengaging type electric wheelchair driver according to claim 1; It is characterized in that: described position-limit mechanism is the draw-in groove that is arranged on the output shaft inner hole wall; Described draw-in groove and chute are perpendicular, and an end of draw-in groove links to each other with this end near handle of chute.

4. but a kind of disengaging type electric wheelchair driver according to claim 3, it is characterized in that: described chute, draw-in groove are groove, and alignment pin is exposed to outside the chute.