CN214713095U

CN214713095U - Gravity center adjustable folding wheelchair

Info

Publication number: CN214713095U
Application number: CN202120305168.9U
Authority: CN
Inventors: 李威; 王占山
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: 2021-11-16
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to the technical field of nursing equipment, and discloses a gravity center adjustable folding wheelchair, which comprises a wheelchair base, wheels, a backrest, a seat cushion and 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, and the seat cushion is connected to the slide rails in a sliding manner. 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

Gravity center adjustable folding wheelchair

Technical Field

The utility model relates to the technical field of nursing equipment, in particular to folding wheelchair of focus adjustable.

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: the backrest, the seat cushion and the push support of the wheelchair in the prior art can be flatly placed and then butted with a bed, or the angles between the backrest, the leg supports and the seat cushion of the wheelchair are directly adjusted, but in the process of flatting, the wheelchair is likely to turn over due to the problems of center of gravity movement and the like, and great potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the problem that exists among the prior art, the utility model provides a focus adjustable folding wheelchair sets up focus adjustment mechanism on the wheelchair, and the disease of being convenient for carries out the wheelchair 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 a gravity center adjustable folding 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 third driving motor is arranged on the slide rails, and the seat cushion is connected with the slide rails in a sliding manner.

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, 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 the 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

Furthermore, a pair of shock absorbers is respectively arranged at the front and the back of the wheelchair base.

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

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 patient's adjustment wheelchair angle, can adjust the seatpad position on the wheelchair through the slide rail according to the weight of disease on the wheelchair and focus position, adjust it to balanced state, prevent that the condition of wheelchair rollover from appearing.

3. 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.

4. 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 structural diagram of the gravity center adjusting mechanism 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.

The wheelchair comprises a center-of-gravity adjusting mechanism 1, a 2-wheelchair, a 201-wheelchair base, a 202-rear wheel, a 203-front wheel, a 204-backrest, a 205-seat cushion, a 206-leg support and foot support, a 207-armrest, a 208-first angle adjuster, a 209-second angle adjuster, a 210-sliding rail support plate, a 211-sliding rail, a 212-sliding rail base groove, a 213-sliding strip, a 214-shock absorber, a 215-anti-roll wheel, a 216-first driving motor, a 217-driving gear, a 218-driven gear, a 219-chain, a 220-second driving motor, a 3-roller piece, a 301-roller, a 302-roller support, a 303-roller spindle, a 304-bearing and a 4-wheel main body.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model discloses a focus adjustable folding 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 and adds foot support 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 adds between the foot support 206 and rotate through second angle modulation ware 209 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 foot support 206. 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 220. During actual use, the slide bar 212 of the slide rail 211 can be controlled by the second driving motor 220 to drive the seat cushion 205 to move, the distance that the current seat cushion 205 needs to move is determined according to the center of gravity, and the slide rail 211 is controlled by the third driving motor to drive the seat cushion 205 to move to meet the requirement.

The wheelchair base 201 is also provided with a pair of shock absorbers 214 at the front and rear thereof, respectively. The vibration of the wheelchair during travel can be reduced by the shock absorber 214, 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 215, the anti-tilting wheels 215 are arranged on the wheelchair 2 through supporting rods, the anti-tilting wheels 215 are rotatably connected to the supporting rods, and when the wheelchair 2 moves forwards or backwards on a road surface, the front and the rear anti-tilting wheels 215 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 embodiment, a pair of front wheels 203 of the wheelchair 2 are provided as omni-directional wheels, and include a roller member 3 and a wheel main body 4, and the roller member 3 includes a roller 301, a roller bracket 302 and a roller main shaft 303; a plurality of rollers 301 are arranged and are fixedly arranged on the wheel main body 4 through corresponding roller brackets 302; the roller 301 is in the shape of a truncated cone (the wheel is large on both sides and small on one side) and is rotatably connected to a roller spindle 303. A pair of bearings 304 are fixedly provided at both ends inside the roller 301, and the roller spindle 303 is fixedly provided at one end thereof to the roller holder 302 and at the other end thereof to the inside of the bearings 304, so that the roller 301 is rotatably provided to the roller holder 302.

In the present embodiment, the number of roller members 3 is 12 in total, and each roller member is fixedly attached to the wheel main body 4 at an inclination angle of 45 ° with respect to the wheel main body 4.

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 gravity center adjusting mechanism 1 is controlled as follows:

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

S2: the controller starts the second driving motor 222 to level the seat cushion 205, the backrest 204 and the leg support 206, the gyroscope sensor and the acceleration sensor detect the gravity center position of the wheelchair 2 in real time in the leveling process, and when the gravity center is shifted, the controller simultaneously controls the third driving motor to drive the seat cushion 205 to slide on the slide rail 211 until the gravity center is within the range meeting the requirement.

S3: the controller starts the second driving motor to control the angles between the lifting seat cushion 205 and the backrest 204 and the leg support and foot support 206, in the lifting 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 third driving motor to drive the seat cushion 205 to slide on the sliding rail 211 to the gravity center range meeting the requirements.

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. A folding wheelchair with an adjustable gravity center comprises a wheelchair base (201), wheels, a backrest (204), a seat cushion (205) and leg support and foot support (206), wherein the wheels are rotationally connected to the wheelchair base (201), the seat cushion (205) is arranged on the wheelchair base (201), and the backrest (204), the leg support and foot support (206) are rotationally connected with the seat cushion (205), and is characterized in that a gravity center adjusting mechanism (1) is further arranged on the wheelchair;

the gravity center adjusting mechanism (1) comprises a sliding rail supporting plate (210) arranged on a wheelchair base (201) and a pair of sliding rails (211) symmetrically arranged on the sliding rail supporting plate (210), a second driving motor (220) is arranged on the sliding rails (211), and a seat cushion (205) is connected with the sliding rails (211) in a sliding mode.

2. The folding wheelchair with the adjustable gravity center 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 center-of-gravity adjustable folding 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 center-of-gravity adjustable folding wheelchair as claimed in claim 2, wherein the front wheel (203) is provided as an omni-wheel, comprising a roller member (3) and a wheel main body (4), the roller member (3) comprising a roller (301), a roller support (302) and a roller main shaft (303); a plurality of rollers (301) are arranged and are fixedly arranged on the wheel main body (4) through corresponding roller brackets (302); the roller (301) is in a circular truncated cone shape and is rotatably connected to the roller spindle (303).

5. The center-of-gravity adjustable folding wheelchair as claimed in claim 4, characterized in that the roller members (3) are each fixedly mounted on the wheel body (4) at an angle of inclination to the wheel body (4).

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

7. The folding wheelchair with the adjustable center of gravity 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 center-of-gravity adjustable folding wheelchair as claimed in any one of claims 1 to 7, wherein a pair of shock absorbers (214) are respectively provided at the front and rear of the wheelchair base (201).

9. The center-of-gravity adjustable folding wheelchair as claimed in any one of claims 1 to 7, wherein a pair of anti-tipping wheels (215) are respectively arranged at the front and the rear of the wheelchair base (201).