CN112773622A

CN112773622A - Adjustable multifunctional wheelchair

Info

Publication number: CN112773622A
Application number: CN202110147814.8A
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: 2021-05-11

Abstract

The invention 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, a leg support and a foot support, 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 center of gravity adjusting mechanism and the lifting adjusting mechanism are arranged on the wheelchair, so that the center of gravity can be adjusted conveniently according to needs, the wheelchair is prevented from turning over, and the potential safety hazard of the wheelchair is reduced.

Description

Adjustable multifunctional wheelchair

Technical Field

The invention relates to the technical field of nursing instruments, in particular to an adjustable multifunctional 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.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides an adjustable multifunctional wheelchair, wherein a gravity center adjusting mechanism and a lifting adjusting mechanism are arranged on the wheelchair, so that the gravity center can be adjusted conveniently according to the requirement, the side turning of the wheelchair is prevented, and the potential safety hazard of the wheelchair is reduced.

The technical scheme is as follows: the invention 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.

The invention also discloses a control method of the adjustable multifunctional wheelchair, wherein the control method is based on the adjustable multifunctional wheelchair structure, the wheelchair is also provided with a gyroscope sensor and an acceleration sensor, the gyroscope sensor and the acceleration sensor are both connected with a controller, and the controller is respectively connected with a first driving motor, a second driving motor, a third driving motor and 4 electric push rods;

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

s1: the controller starts a first driving motor to drive the wheelchair to move forward or backward;

s2: the controller starts a third driving motor to adjust the angles between the seat cushion and the backrest and between the seat cushion and the leg support, a gyroscope sensor and an acceleration sensor detect the gravity center position of the wheelchair in real time in the adjusting process, and when the gravity center is shifted, the controller simultaneously controls a second driving motor to drive the seat cushion to slide on the sliding rail until the seat cushion slides to the gravity center range meeting the requirements;

s3: the controller starts a third driving motor to adjust the angles between the seat cushion and the backrest and between the seat cushion and the leg support, a gyroscope sensor and an acceleration sensor detect the gravity center position of the wheelchair in real time in the adjusting process, and when the gravity center is shifted, the controller simultaneously controls a second driving motor to drive the seat cushion to slide on the sliding rail until the seat cushion slides to the gravity center range meeting the requirements;

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

a1: the controller starts the first driving motor to drive the wheelchair to climb or descend;

a2: the gravity center position of the wheelchair is detected in real time by a gyroscope sensor and an acceleration sensor, and when the gravity center shift occurs during climbing, the controller controls a pair of electric push rods positioned at the rear side of the wheelchair to ascend or controls one electric push rod positioned at the front side of the wheelchair to descend, so that the gravity center of the wheelchair is adjusted;

a3: when the center of gravity shifts when descending a slope, the controller controls the pair of electric push rods positioned on the front side of the wheelchair to ascend or the electric push rod positioned on the rear side of the wheelchair to descend, and then the center of gravity of the wheelchair is adjusted.

Has the advantages that:

1. the angle adjustment between the seat cushion and the backrest and between the seat cushion and the leg support and the foot support is realized through the first angle adjuster and the second angle adjuster, and when the wheelchair is actually installed and used, the first angle adjuster and the second angle adjuster are driven by the driving motor to automatically realize the operation that the wheelchair is laid flat into a bed body or the bed body is folded into the wheelchair, so that the wheelchair angle adjustment can be conveniently carried out by a patient.

2. According to the wheelchair, the gravity center adjusting mechanism is arranged on the wheelchair base, so that when the wheelchair is laid flat or turned into a wheelchair, the position of a seat cushion on the wheelchair can be adjusted to be in a balanced state through the sliding rail according to the weight and the gravity center position of a patient on the wheelchair, and the condition that the wheelchair is overturned is prevented.

3. According to the invention, the lifting adjusting mechanism is arranged on the wheelchair base, the wheelchair angle adjustment and the height adjustment of the wheelchair in butt joint with the bed body are realized through the lifting adjusting mechanism, the wheelchair can be in butt joint with bed body components with different heights through the lifting adjusting mechanism, and the heights of 4 electric push rods are adjusted according to actual requirements. 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. According to the invention, the hub driving motor is arranged at the rear wheel position of the wheelchair, and the front wheel and the rear wheel are driven simultaneously through the chain wheel assembly.

5. According to the invention, the omnidirectional wheels are arranged on the front wheels, so that the climbing force (or the ground grabbing force) is better; 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 view of the wheelchair drive mechanism of the present invention;

FIG. 4 is a schematic view of the back, seat cushion, leg rest and foot rest of the wheelchair of the present invention;

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

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

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

FIG. 8 is a perspective view of the construction of the roller element 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 invention is further described below 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 invention discloses an adjustable multifunctional wheelchair, wherein the wheelchair 2 comprises a wheelchair base 201, a pair of rear wheels 202, a pair of front wheels 203, a backrest 204, a seat cushion 205, a leg support and foot support 206 and a pair of handrails 207, the pair of rear wheels 202 and the pair of front wheels 203 are rotatably connected to the wheelchair base 201, the seat cushion 205 is arranged on the wheelchair base 201, the backrest 204 and the seat cushion 205 are rotatably connected through a first angle adjuster 208, the seat cushion 205 and the leg support and foot support 206 are rotatably connected through a second angle adjuster 209, the first angle adjuster 208 and the second angle adjuster 209 are respectively connected with a third driving motor, and the first angle adjuster 208 and the second angle adjuster 209 are driven by the third driving motor to adjust the angles of the backrest 204 and the leg support and foot support 206 for flatting the wheelchair. 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 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 merely illustrative of the technical concepts 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 implement the present invention, and not to 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 within 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.

10. A control method of an adjustable multifunctional wheelchair is based on the structure of the adjustable multifunctional wheelchair, the wheelchair is also provided with a gyroscope sensor and an acceleration sensor, the gyroscope sensor and the acceleration sensor are both connected with a controller, and the controller is respectively connected with a first driving motor (216), a second driving motor (222), a third driving motor and 4 electric push rods (214), and the control method is characterized by comprising a control method of a gravity center adjusting mechanism (1) and a control method of a lifting adjusting mechanism (3);

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

s1: the controller starts a first driving motor (216) to drive the wheelchair to move forwards or backwards;

s2: the controller starts a third driving motor to adjust the angles between the seat cushion (205) and the backrest (204) and between the leg support and the foot support (206), a gyroscope sensor and an acceleration sensor detect the gravity center position of the wheelchair (2) in real time in the adjustment process, and when the gravity center is displaced, the controller simultaneously controls a second driving motor (222) to drive the seat cushion (205) to slide on the sliding rail (211) until the gravity center is within the range meeting the requirement;

s3: the controller starts a third driving motor to adjust the angles between the seat cushion (205) and the backrest (204) and between the leg support and the foot support (206), a gyroscope sensor and an acceleration sensor detect the gravity center position of the wheelchair (2) in real time in the adjustment process, and when the gravity center is displaced, the controller simultaneously controls a second driving motor (222) to drive the seat cushion (205) to slide on the sliding rail (211) until the gravity center is within the range meeting the requirement;

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

a1: the controller starts a first driving motor (216) to drive the wheelchair to climb or descend;

a2: the gravity center position of the wheelchair is detected in real time by a gyroscope sensor and an acceleration sensor, and when the gravity center shift occurs during climbing, the controller controls a pair of electric push rods (214) positioned at the rear side of the wheelchair to ascend or controls one electric push rod (214) positioned 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 slopes, the controller controls the pair of electric push rods (214) positioned on the front side of the wheelchair (2) to ascend or the electric push rod (214) positioned on the rear side to descend, and then the center of gravity of the wheelchair (2) is adjusted.