CN214761869U

CN214761869U - Adjustable multifunctional wheelchair

Info

Publication number: CN214761869U
Application number: CN202120305127.XU
Authority: CN
Inventors: 李威; 李福军
Original assignee: Suzhou Maisijie Intelligent Technology Co ltd
Current assignee: Suzhou Maisijie Intelligent Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-11-19
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to the technical field of nursing instruments and discloses an adjustable multifunctional wheelchair, which comprises a wheelchair base, wheels, a backrest, a seat cushion, leg supports and foot supports, wherein the seat cushion is arranged on the wheelchair base; the gravity center adjusting mechanism comprises a slide rail supporting plate arranged on the wheelchair base and a pair of slide rails symmetrically arranged on the slide rail supporting plate, and the seat cushion is connected to the slide rails in a sliding manner. The lifting adjusting mechanism comprises 4 electric push rods, a wheelchair frame is arranged on the upper surface of the wheelchair base, and the lifting rods of the 4 electric push rods are rotatably connected onto the wheelchair frame. Compared with the prior art, the utility model discloses set up focus adjustment mechanism and lift adjustment mechanism on the wheelchair, be convenient for carry out the focus as required and adjust, prevent that the wheelchair from turning on one's side, reduced the potential safety hazard of wheelchair.

Description

Adjustable multifunctional wheelchair

Technical Field

The utility model relates to the technical field of nursing equipment, concretely relates to adjustable multi-functional wheelchair.

Background

The wheelchair is a special walking tool for the lower limb disabled. The wheelchair can be divided into a motorized wheelchair and a hand-operated wheelchair according to the driving mode; the hand tricycle can adapt to running on various roads due to the large wheel diameter, is mainly used as a long-distance travel tool outdoors, and can be loaded with goods properly; it has the characteristics of high running speed, labor saving and the like. Motorized wheelchair vehicles are equipped with a backrest, armrests and seat belt restraints to keep the user's body stable, and have short range hand-shifting devices to allow manual movement to safe or unobstructed traffic areas in the event of a failure. Strong maneuverability, convenient fuel supplement, convenient operation and the like.

With the development of times and the improvement of the technological level, the motorized wheelchair has been made into various forms in the existing market, the market using requirements are met, but the prior art still has a plurality of technical defects in consideration of comfort, convenience in use, safety and the like: (1) in the wheelchair in the prior art, the backrest, the seat cushion and the push support can be flatly placed and then butted with a bed, or the angles among the backrest, the leg supports and the seat cushion of the wheelchair are directly adjusted, but in the process of flatting, the wheelchair can be turned over due to the problems of center of gravity movement and the like, and great potential safety hazards exist; (2) the center of gravity of the wheelchair is unbalanced in the climbing process, and the phenomenon of side turning occurs; (3) when the wheelchair is butted with a bed, the wheelchair is difficult to be butted with bed bodies with different heights.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the problem that exists among the prior art, the utility model provides an adjustable multi-functional wheelchair sets up focus adjustment mechanism and lift adjustment mechanism on the wheelchair, is convenient for carry out the focus as required and adjusts, prevents that the wheelchair from turning on one's side, has reduced the potential safety hazard of wheelchair.

The technical scheme is as follows: the utility model provides an adjustable multifunctional wheelchair, which comprises a wheelchair base, wheels, a backrest, a seat cushion, leg supports and foot supports, wherein the wheels are rotationally connected to the wheelchair base;

the gravity center adjusting mechanism comprises a slide rail supporting plate arranged on the wheelchair base and a pair of slide rails symmetrically arranged on the slide rail supporting plate, a second driving motor is arranged on the slide rails, and the seat cushion is connected with the slide rails in a sliding manner.

The lifting adjusting mechanism comprises 4 electric push rods, a wheelchair frame is arranged on the upper surface of the wheelchair base, and 4 lifting rods of the electric push rods are rotatably connected onto the wheelchair frame.

Furthermore, the wheels comprise a pair of front wheels and a pair of rear wheels, the front wheels and the rear wheels are rotatably connected to the wheelchair base, and the pair of rear wheels and the pair of front wheels are provided with driving mechanisms for driving the wheelchair to move back and forth.

Furthermore, the driving mechanism comprises a first driving motor arranged on the pair of rear wheels, a driving gear fixed on an output shaft of the first driving motor, a driven gear fixed on a central shaft of the pair of front wheels, and a chain meshed between the driving gear and the driven gear.

Further, the front wheel is set as an omnidirectional wheel and comprises a roller piece and a wheel main body, wherein the roller piece comprises a roller, a roller bracket and a roller main shaft; the rollers are arranged in a plurality and are fixedly arranged on the wheel main body through the corresponding roller supports; the roller is in a circular truncated cone shape and is rotatably connected to the roller spindle.

Further, the roller pieces are fixedly mounted on the wheel main body at a certain inclination angle with the wheel main body.

Further, the inclination angle is 30~ 60.

Furthermore, a pair of shock absorbers are respectively arranged at the front and the back of the wheelchair base (201).

Furthermore, a pair of anti-tilting wheels is respectively arranged at the front and the back of the wheelchair base.

Furthermore, the backrest is rotatably connected with the seat cushion through a first angle adjuster, the seat cushion is rotatably connected with the leg support and foot support through a second angle adjuster, and the first angle adjuster and the second angle adjuster are both connected with a third driving motor.

Has the advantages that:

1. the utility model discloses a first angle modulation ware, second angle modulation ware realize seatpad and back, leg hold in the palm with the foot hold in the palm the angle modulation between, when actual installation uses, can drive first, second angle modulation ware automatically realize that the wheelchair is set level into the bed body or the bed body is folding for the operation of wheelchair, the patient of being convenient for oneself carries out wheelchair angle modulation.

2. The utility model discloses set up focus adjustment mechanism on the wheelchair base, when the wheelchair was set level or was become the wheelchair like this, can adjust the seatpad position on the wheelchair through the slide rail according to the weight of disease on the wheelchair and focus position with it, adjust it to balanced state, prevent that the condition of wheelchair from turning over from appearing.

3. The utility model discloses set up lift adjustment mechanism on the wheelchair base, through the altitude mixture control when lift adjustment mechanism realizes wheelchair angle modulation and wheelchair and the butt joint of the bed body, through lift adjustment mechanism, can make the wheelchair dock the not bed body subassembly of co-altitude, adjust 4 electric putter's height according to actual need. The height of the whole wheelchair can be adjusted through the lifting adjusting mechanism, and the gravity center unbalance condition when the wheelchair climbs can be caused by adjusting the heights of the two electric push rods at the front end or the two push rods at the back. When the wheelchair climbs a slope, the height of the wheelchair can be adjusted upwards through the two electric push rods at the rear side, so that the gravity center of the wheelchair can move forwards, and the phenomenon of overturning can not occur. When the wheelchair is in downhill, the height of the wheelchair can be adjusted through the two electric push rods on the front side, the gravity center of the wheelchair moves backwards, and the phenomenon of overturning is avoided.

4. The utility model discloses set up wheel hub driving motor in the rear wheel position of wheelchair to realize the front and back wheel simultaneous drive through the sprocket subassembly.

5. The utility model arranges the omnidirectional wheel on the front wheel, which can have better climbing force (or ground grabbing force); the wheel can be smooth go on comparatively complicated road surface (for example mud face, sandy beach, rugged road surface etc.), and roller spare is whole forms 30~60 angles with vertical face in the installation, and the roller can rotate round bearing self simultaneously, adopts such combination mode, can make the wheel have level and two kinds of movements of wheel rotation. The wheel adopting the design scheme can meet three running modes of transverse running, longitudinal running and self-rotation of the wheel under the control of the control motor.

Drawings

FIG. 1 is a schematic view of the overall structure of the wheelchair of the present invention;

FIG. 2 is a schematic view of the wheelchair base of the present invention;

FIG. 3 is a schematic structural view of a driving mechanism of the wheelchair of the present invention;

FIG. 4 is a schematic view of the structure of the backrest, the seat cushion, the leg support and the foot support of the wheelchair of the present invention;

FIG. 5 is a schematic view of the center of gravity adjusting mechanism on the wheelchair base of the wheelchair of the present invention;

FIG. 6 is a schematic view of the structure of the lifting adjustment mechanism of the wheelchair base of the present invention;

FIG. 7 is a schematic view of the overall structure of an omni-directional wheel used on the wheelchair of the present invention;

fig. 8 is a perspective view of the roller of the present invention.

Wherein, 1-a gravity center adjusting mechanism, 2-a wheelchair, 201-a wheelchair base, 202-a rear wheel, 203-a front wheel, 204-a backrest, 205-a seat cushion, 206-a leg support and a foot support, 207-an armrest, 208-a first angle adjuster, 209-a second angle adjuster, 210-a slide rail supporting plate, 211-a slide rail, 212-a slide rail base groove, 213-a slide bar, 214-an electric push rod, 215-a wheelchair frame, 216-a first driving motor, 217-a driving gear, 218-a driven gear, 219-a chain, 220-a shock absorber, 221-an anti-tilting wheel, 222-a second driving motor, 3-a lifting adjusting mechanism, 4-a roller piece, 401-a roller, 402-a roller support, 403-a roller spindle and 404-a bearing, 5-wheel body.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

The utility model discloses an adjustable multi-functional wheelchair, this wheelchair 2 includes wheelchair base 201, a pair of rear wheel 202, a pair of front wheel 203, back 204, seatpad 205, the leg holds in the palm with the foot and holds in the palm 206 and a pair of handrail 207, a pair of rear wheel 202 all rotates with a pair of front wheel 203 and connects on wheelchair base 201, seatpad 205 is located on wheelchair base 201, rotate through first angle modulation ware 208 between back 204 and the seatpad 205 and be connected, seatpad 205 holds in the palm with the leg and rotates through second angle modulation ware 209 between holding in the palm 206 and be connected, first angle modulation ware 208, second angle modulation ware 209 is connected with the third driving motor respectively, through the first angle modulation ware 208 of third driving motor drive, back 204 is adjusted to second angle modulation ware 209, the leg holds in the palm the angle that adds the foot and holds in the palm 206, a flat wheelchair for put. The armrest 207 is rotatably connected to the backrest 204, and a driving mechanism is provided on the pair of rear wheels 202 and the pair of front wheels 203 to drive the wheelchair 2 to move forward and backward. The driving mechanism includes a first driving motor 216 disposed on the pair of rear wheels 202, a driving gear 217 fixed to an output shaft of the first driving motor 216, a driven gear 218 fixed to a central shaft of the pair of front wheels 203, and a chain 219 engaged between the driving gear 217 and the driven gear 218, wherein the first driving motor 216 drives the driving gear 217 to rotate the driven gear 218 through the chain 219. Thus, the entire wheelchair 2 only requires a drive mechanism on the rear wheels 202 and the simultaneous movement of the front and rear wheels is ensured.

The upper surface of the wheelchair base 201 is further provided with a gravity center adjusting mechanism 1, the gravity center adjusting mechanism 1 comprises a slide rail support plate 210 arranged on the wheelchair base 201 and a pair of slide rails 211 symmetrically arranged on the slide rail support plate 210, the slide rails 211 comprise slide rail base grooves 212 fixed on the wheelchair base 201 and slide bars 212 fixed on the lower surface of the seat cushion 205, and the slide bars 212 are slidably connected in the slide rail base grooves 212. The slide rail 211 is provided with a second driving motor 222. In practical use, the second driving motor 222 controls the slide bar 212 of the slide rail 211 to drive the seat cushion 205 to move, the distance that the seat cushion 205 needs to move is determined according to the center of gravity, and the slide rail 211 is controlled by the motor to drive the seat cushion 205 to move to meet the requirement.

The wheelchair base 201 is further provided with a lifting adjusting mechanism 3, the lifting adjusting mechanism 3 comprises 4 electric push rods 214, the upper surface of the wheelchair base 201 is provided with a wheelchair frame 215, and the lifting rods of the 4 electric push rods 214 are rotatably connected to the wheelchair frame 215. The slide rail support plate 210 of the center of gravity adjusting mechanism 1 is provided on the wheelchair frame 215, and the seat cushion 205 is slidably connected to the pair of slide rails 211 of the slide rail support plate 210.

The wheelchair base 201 is also provided with a pair of shock absorbers 220 at the front and rear thereof, respectively. The vibration of the wheelchair during traveling can be reduced by the damper 220, and the vibration can be reduced when the wheelchair travels on a complex road surface. The front end and the rear end of the wheelchair base 201 are respectively provided with a pair of anti-tilting wheels 221, the anti-tilting wheels 221 are arranged on the wheelchair 2 through struts, the anti-tilting wheels 221 are rotatably connected to the struts, and when the wheelchair 2 moves forwards or backwards on a road surface, the front and rear anti-tilting wheels 221 of the wheelchair base 201 are respectively contacted with the ground.

In order to facilitate the wheelchair 2 to rotate in situ at a small angle or to facilitate the wheelchair 2 to climb and go on a complex road, in the present embodiment, a pair of front wheels 203 of the wheelchair 2 are provided as omni-directional wheels, and include a roller member 4 and a wheel main body 5, the roller member 4 includes a roller 401, a roller bracket 402 and a roller main shaft 403; a plurality of rollers 401 are arranged and are fixedly arranged on the wheel main body 5 through corresponding roller brackets 402; the roller 401 is in the shape of a truncated cone (the wheels are larger on both sides and smaller on both sides) and is rotatably attached to a roller spindle 403. A pair of bearings 404 is fixedly provided at both ends inside the roller 401, and the roller spindle 403 is fixedly provided at one end in the roller holder 402 and at the other end in the bearing 404, so that the roller 401 is rotatably provided on the roller holder 402.

In the present embodiment, the number of roller members 4 is 12 in total, and each roller member is fixedly attached to the wheel main body 5 at an inclination angle of 45 ° with respect to the wheel main body 5.

The omnidirectional wheel of the utility model can run on various complex road surfaces, and is smooth and unobstructed; meanwhile, the wheel can rotate transversely, longitudinally and automatically, various driving modes of the wheel are met, and small-angle rotation of the wheel is achieved.

The working principle is as follows:

still set up gyroscope sensor and acceleration sensor on this wheelchair 2, gyroscope sensor and acceleration sensor all are connected with a controller, and the controller is connected with first driving motor 216, second driving motor 222, third driving motor and 4 electric putter 214 respectively.

The control method of the gravity center adjusting mechanism 1 comprises the following steps:

s1: the controller activates the first drive motor 216 to drive the wheelchair 2 forward or backward.

S2: the controller starts the third driving motor to adjust the angles of the seat cushion 205, the backrest 204 and the leg support and foot support 206, in the adjusting process, the gyroscope sensor and the acceleration sensor detect the gravity center position of the wheelchair 2 in real time, and when the gravity center shifts, the controller simultaneously controls the second driving motor 222 to drive the seat cushion 205 to slide on the slide rail 211 to the gravity center range meeting the requirements.

S3: the controller starts a third driving motor to control and adjust the angles between the seat cushion 205 and the backrest 204 and the leg support and foot support 206, in the adjusting process, the gyroscope sensor and the acceleration sensor detect the gravity center position of the wheelchair 2 in real time, and when the gravity center shifts, the controller simultaneously controls the second driving motor to drive the seat cushion 205 to slide on the slide rail 211 to the gravity center range meeting the requirements.

The control method of the lifting adjusting mechanism 3 comprises the following steps:

a1: the controller activates the first drive motor 216 to drive the wheelchair up or down a hill.

A2: the gyroscope sensor and the acceleration sensor detect the gravity center position of the wheelchair 2 in real time, and when the gravity center position is shifted during climbing, the controller controls the pair of electric push rods 214 positioned at the rear side of the wheelchair to ascend or the electric push rod 214 at the front side to descend, so that the gravity center of the wheelchair 2 is adjusted.

A3: when the center of gravity shifts when descending a slope, the controller controls the pair of electric push rods 214 positioned at the front side of the wheelchair 2 to ascend or the electric push rod 214 at the rear side to descend, thereby adjusting the center of gravity of the wheelchair 2.

When a patient needs to get on or off the wheelchair 2, the whole wheelchair frame 215 can be descended through the lifting adjusting mechanism 3, so that the patient can get on or off conveniently, and the safety risk is reduced.

When the wheelchair 2 needs to be in butt joint with beds of different heights, the controller adjusts the 4 electric push rods 214 to lift, so that the height of the wheelchair 2 is adjusted, and the butt joint with the beds is facilitated.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An adjustable multifunctional wheelchair is characterized in that a gravity center adjusting mechanism (1) and a lifting adjusting mechanism (3) are further arranged on the wheelchair (2);

the gravity center adjusting mechanism (1) comprises a slide rail supporting plate (210) arranged on a wheelchair base (201) and a pair of slide rails (211) symmetrically arranged on the slide rail supporting plate (210), a second driving motor (222) is arranged on the slide rails (211), and the seat cushion (205) is connected to the slide rails (211) in a sliding manner;

the lifting adjusting mechanism (3) comprises 4 electric push rods (214), a wheelchair frame (215) is arranged on the upper surface of the wheelchair base (201), and 4 lifting rods of the electric push rods (214) are rotatably connected onto the wheelchair frame (215).

2. The adjustable multifunctional wheelchair as claimed in claim 1, wherein the wheels comprise a pair of front wheels (203) and a pair of rear wheels (202), which are rotatably connected to the wheelchair base (201), and the pair of rear wheels (202) and the pair of front wheels (203) are provided with driving mechanisms for driving the wheelchair to move back and forth.

3. The adjustable multi-function wheelchair as claimed in claim 2, wherein the driving mechanism comprises a first driving motor (216) provided to the pair of rear wheels (202), a driving gear (217) fixed to an output shaft of the first driving motor (216), a driven gear (218) fixed to a central shaft of the pair of front wheels (203), and a chain (219) engaged between the driving gear (217) and the driven gear (218).

4. The adjustable multi-function wheelchair as claimed in claim 2, characterized in that the front wheel (203) is provided as an omni-wheel, comprising a roller piece (4) and a wheel body (5), the roller piece (4) comprising a roller (401), a roller bracket (402) and a roller spindle (403); a plurality of rollers (401) are arranged and are fixedly arranged on the wheel main body (5) through corresponding roller brackets (402); the roller (401) is in the shape of a circular truncated cone, and is rotatably connected to the roller spindle (403).

5. Adjustable multi-function wheelchair in accordance with claim 4, characterized in that the roller pieces (4) are each fixedly mounted on the wheel body (5) at an angle of inclination to the wheel body (5).

6. The adjustable multi-function wheelchair as claimed in claim 5, wherein the angle of inclination is 30-60 °.

7. The adjustable multifunctional wheelchair as claimed in claim 1, wherein the backrest (204) is rotatably connected with the seat cushion (205) through a first angle adjuster (208), the seat cushion (205) is rotatably connected with the leg support and foot support (206) through a second angle adjuster (209), and a third driving motor is connected to each of the first angle adjuster (208) and the second angle adjuster (209).

8. The adjustable multifunctional wheelchair as claimed in any one of claims 1 to 7, wherein a pair of shock absorbers (220) are further provided at the front and rear of the wheelchair base (201), respectively.

9. The adjustable multifunctional wheelchair as claimed in any one of claims 1 to 7, wherein a pair of anti-roll wheels (221) are further provided at the front and rear of the wheelchair base (201), respectively.