CN105496669A - Adjustable wheelchair active driving device - Google Patents

Abstract

The invention discloses an adjustable wheelchair active driving device, which comprises: a main shaft, the two ends of which are respectively connected with the rear wheel of a wheelchair; a drive shaft, which is longitudinally arranged on the wheelchair in a rotatable manner and located One side of the driving shaft, the upper end of the driving shaft corresponds to the height of the armrest of the seat; the hand wheel is fixedly arranged on the upper end of the driving shaft; the driven shaft is arranged on the wheelchair in parallel with the main shaft above; the driven shaft is located below the drive shaft, and one end of the driven shaft is connected to the lower end of the drive shaft through a pair of bevel gear mechanism or worm gear mechanism; and the transmission mechanism, the driven shaft It is connected with the main shaft through the transmission mechanism to drive the main shaft to rotate. The invention can make it convenient for the person with difficulty in walking to manually control the hand wheel to drive the wheelchair to move.

Description

An adjustable wheelchair active drive device

technical field

The invention relates to the field of wheelchairs, in particular to an adjustable wheelchair active driving device.

Background technique

Nowadays, the number of special groups of people with inconvenient walking due to old age, illness or accidents remains high, and these special groups of people with inconvenient walking need help from others in daily life to complete some daily activities. Wheelchairs are one of the most important assistive tools for people with walking disabilities. Wheelchairs bring great convenience to them and the people who care for them.

Existing wheelchairs mainly need other people to push and control them through the handles in the process of moving. When no one is looking after them, they still have the ability to operate wheelchairs for people with only inconvenient legs and feet but normal upper limbs. However, existing wheelchairs can only be controlled by these people by directly turning the wheels with their hands. The operation is cumbersome, laborious and easy to dirty hands. Therefore, it is difficult for these people to control the wheelchair for a long time or over a long distance.

The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art.

Contents of the invention

The purpose of the present invention is to provide an adjustable active driving device for wheelchairs, so as to overcome the disadvantages that people with walking disabilities need to turn the wheels by hand when they control the wheelchair to move forward, which makes the operation more troublesome, laborious and easy to dirty hands.

In order to achieve the above object, the present invention provides an adjustable wheelchair active drive device, which includes: a main shaft, each of which is connected to a rear wheel of a wheelchair at both ends; a drive shaft, which is longitudinally arranged on the On the wheelchair and on one side of the seat, the upper end of the drive shaft corresponds to the height of the armrest of the seat; the hand wheel is fixed on the upper end of the drive shaft; the driven shaft is parallel to the main shaft is arranged on the wheelchair; the driven shaft is located below the driving shaft, and one end of the driven shaft is connected to the lower end of the driving shaft through a pair of bevel gear mechanism or worm gear mechanism; and the transmission mechanism , the driven shaft is connected with the main shaft through the transmission mechanism to drive the main shaft to rotate.

Preferably, in the above technical solution, the transmission mechanism includes: a driven shaft gear, which is fixedly sleeved on the driven shaft; a first transmission shaft, which is arranged on the wheelchair in parallel with the driven shaft , and the first transmission shaft is located at the rear and lower side of the driven shaft; two first transmission gears are arranged on the first transmission shaft, one of the first transmission gears meshes with the driven shaft gear connection; the second transmission shaft, which is arranged on the wheelchair parallel to the driven shaft; the second transmission shaft is located at the rear and lower side of the first transmission shaft, and the second transmission shaft is located at the The upper front; the second transmission shaft is provided with two second transmission gears, one of which is meshed with the other first transmission gear; and the main shaft gear is fixedly sleeved on the On the main shaft, the main shaft gear is meshed with another second transmission gear.

Preferably, in the above technical solution, the diameter of the first transmission gear meshing with the driven shaft gear is smaller than the diameter of the other first transmission gear; the second transmission gear meshing with the main shaft gear The diameter is greater than the diameter of the other said second transmission gear.

Compared with the prior art, the present invention has the following beneficial effects:

The invention can make it convenient for the person with difficulty walking to manually control the hand wheel to drive the wheelchair to move.

Description of drawings

Fig. 1 is a structural schematic diagram of an adjustable wheelchair active driving device installed on a wheelchair according to the present invention.

Fig. 2 is a schematic structural view of the adjustable wheelchair active driving device according to the present invention.

Explanation of main reference signs:

1-wheelchair, 11-seat, 12-armrest, 13-rear wheel; 2-main shaft, 21-main shaft gear; 3-driving wheel, 31-worm, 32-worm gear; 4-hand wheel; 5-driven shaft , 51-driven shaft gear; 6-first transmission shaft, 61-first transmission gear; 7-second transmission shaft, 71-second transmission gear.

detailed description

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

Fig. 1 to Fig. 2 have shown the structure schematic diagram of adjustable wheelchair active driving device according to the preferred embodiment of the present invention, and this adjustable wheelchair active driving device comprises main shaft 2, driving shaft 3, hand wheel 4, driven shaft 5 and transmission mechanism .

Referring to Fig. 1, the two ends of the main shaft 2 are respectively connected with the rear wheels 13 of a wheelchair 1, the rotation of the main shaft 2 can drive the two rear wheels 13 to rotate to realize the walking of the wheelchair 1, and the front wheels of the wheelchair 1 can change direction. The drive shaft 3 is longitudinally arranged on the wheelchair 1 in a rotatable manner and is located on one side of the seat 11. The upper end of the drive shaft 3 corresponds to the height of the armrest 12 of the seat 11. The hand wheel 4 is fixedly arranged on the upper end of the drive shaft 3. , so that the handwheel 4 is corresponding to the height of the handrail 12, the person who has difficulty walking sits on the wheelchair 1 and just can manually turn the handwheel 4 to make the drive shaft 3 rotate positively and negatively.

Referring to FIG. 2 , the driven shaft 5 is arranged on the wheelchair 1 parallel to the main shaft 2 and is located under the seat 11 . The driven shaft 5 is located below the drive shaft 3, and one end of the driven shaft 5 is connected to the lower end of the drive shaft 3 through a pair of bevel gear mechanisms or worm gear mechanisms. When connecting through a pair of bevel gear mechanisms, one of the bevel gears is fixed on the lower end of the drive shaft 3, and the other bevel gear is fixed on the driven shaft 5. These two bevel gears are meshed and connected, so that the drive shaft 3 is driven Rotary transmission of axis 5. Preferably in the present invention, the driven shaft 5 and the driving shaft 3 are driven by a worm gear mechanism, so as to have good self-locking ability. The upper end of the worm 31 of the worm gear mechanism is fixedly connected with the lower end of the drive shaft 3, and the worm wheel 32 is fixedly sleeved on the driven shaft 3, and the worm wheel 32 is meshed with the worm 31, and the drive shaft 3 can drive the driven shaft 5 when it rotates. Make a turn.

Continuing to refer to FIG. 2 , the driven shaft 5 is connected to the main shaft 2 through a transmission mechanism to drive the main shaft 2 to rotate. Preferably, the transmission mechanism includes a driven shaft gear 51, a first transmission shaft 6, a second transmission shaft 7 and a main shaft gear 21, the driven shaft gear 51 is fixedly sleeved on the driven shaft 5, the first transmission shaft 6 and the driven shaft The driving shaft 5 is arranged on the wheelchair 1 in parallel, and the first transmission shaft 6 is located behind and below the driven shaft 5 . The first transmission shaft 6 is provided with two first transmission gears 61 , one of the first transmission gears 61 is meshed with the driven shaft gear 51 , and the rotation of the driven shaft 5 can drive the first transmission shaft 6 to rotate. The second transmission shaft 7 is arranged on the wheelchair 1 parallel to the driven shaft 5 , the second transmission shaft 7 is located behind the first transmission shaft 6 , and the second transmission shaft 7 is located above the front of the main shaft 2 . Two second transmission gears 71 are arranged on the second transmission shaft 7, and one of the second transmission gears 71 is meshed with the other first transmission gear 61. When the first transmission shaft 6 rotates, it can drive the second transmission shaft 7 Make a turn. The main shaft gear 21 is fixedly sleeved on the main shaft 2, and the main shaft gear 21 is engaged with another second transmission gear 71. When the second transmission shaft 7 rotates, it can drive the main shaft 2 to rotate. Preferably, the diameter of the first transmission gear 61 meshing with the driven shaft gear 51 is smaller than the diameter of the other first transmission gear 61; the diameter of the second transmission gear 71 meshing with the main shaft gear 21 is larger than that of the other second transmission gear. The diameter of the gear 71. The present invention carries out transmission through the gear mechanism, and its structure is compact, and transmission is stable.

The present invention can make it convenient for people who have trouble walking to manually control the hand wheel 4 to drive the drive shaft 3 to rotate, thereby causing the driven shaft 5 to rotate. The driven shaft 5 drives the main shaft 2 to rotate through gear transmission, and the main shaft 2 drives the two rear The wheel 13 rotates to drive the wheelchair 1 to move. Its structure is simple, easy to operate, labor-saving and hygienic, so that people with difficulty walking can move the wheelchair 1 alone for a long distance or for a long time, so that under certain circumstances, no one else is required to help Or look after, to further improve the convenience of wheelchair 1.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to make and use various exemplary embodiments of the invention, as well as various Choose and change. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (3)

1. an adjustable wheelchair active driving device, is characterized in that, comprising:

Main shaft, its two ends are respectively connected with the trailing wheel of a wheelchair;

Driving shaft, it to be rotatably longitudinally arranged on described wheelchair and to be positioned at the side of seat, and the upper end of this driving shaft is corresponding with the height of the handrail of described seat;

Handwheel, it is fixedly installed on the upper end of described driving shaft;

Driven shaft, is arranged on described wheelchair itself and described main axis parallel; This driven shaft is positioned at the below of described driving shaft, and one end of this driven shaft is connected with the lower end of described driving shaft by bevel-gear sett mechanism or worm-and-wheel gear; And

Drive mechanism, described driven shaft is connected by this drive mechanism with described main shaft, rotates to drive described main shaft.

2. adjustable wheelchair active driving device according to claim 1, is characterized in that, described drive mechanism comprises:

Driven shaft gear, its fixed cover is located on described driven shaft;

First power transmission shaft, itself and described driven shaft are arranged on described wheelchair abreast, and this first power transmission shaft is positioned at the back lower place of described driven shaft; This first power transmission shaft is provided with two the first travelling gears, the first travelling gear described in one of them and described driven shaft gear are connected with a joggle;

Second driving shaft, itself and described driven shaft are arranged on described wheelchair abreast; This second driving shaft is positioned at the back lower place of described first power transmission shaft, and this second driving shaft is positioned at the front upper place of described main shaft; This second driving shaft is provided with two the second travelling gears, the second travelling gear described in one of them and the first travelling gear described in another are connected with a joggle; And

Mainshaft gear, its fixed cover is located on described main shaft, and this mainshaft gear and the second travelling gear described in another are connected with a joggle.

3. adjustable wheelchair active driving device according to claim 2, is characterized in that, is less than the diameter of the first travelling gear described in another with the diameter that described driven shaft gear carries out described first travelling gear engaged; The diameter of the second travelling gear described in another is greater than with the diameter that described mainshaft gear carries out the second travelling gear engaged.