CN109431700B

CN109431700B - Multifunctional wheelchair

Info

Publication number: CN109431700B
Application number: CN201811297944.4A
Authority: CN
Inventors: 管中林
Original assignee: Dingyuan County Zhonglin Machinery Technology Co ltd
Current assignee: Anhui jinbaihe Medical Equipment Co.,Ltd.
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2020-04-24
Anticipated expiration: 2038-11-02
Also published as: CN109431700A

Abstract

The invention discloses a multifunctional wheelchair, which comprises a chair seat, a chair seat suspension frame, wheels and wheel suspension beams, wherein the chair seat is fixedly connected with the chair seat suspension frame through an L-shaped support beam; the upper surface of the chair seat suspension frame is provided with an oscillating rod, a steering pulley block, a motor and a rotating base, a screw rod of the motor is sleeved in a sliding sleeve of the oscillating rod, and one end of the oscillating rod is connected with a movable pulley through a clip-shaped support; the chair seat is provided with a fixed pulley, the wheel suspension beam is provided with a steel cable fixed point, a fixed pulley, a steering pulley block and a movable pulley which are connected in series through a steel cable. The suspension system of the wheels and the suspension system of the seat are independent from each other, the two suspension systems run independently in the inclined mode, when the wheels bump, the seat basically keeps in the horizontal direction, all the wheels can land on the ground, the stress of all the wheels is balanced, and the suspension of the wheels and the overturning risk caused by the suspension of the wheels can be avoided.

Description

Multifunctional wheelchair

Technical Field

The invention relates to the technical field of wheelchairs, in particular to a multifunctional wheelchair.

Background

The wheelchair is an indispensable travel tool for the old, the weak and the disabled with the disabled lower limbs, is also an important tool for the rehabilitation of the sick and wounded, and more importantly, enables the old, the weak and the disabled with the disabled lower limbs to perform physical exercises and participate in social activities by means of the wheelchair. Wheelchairs are generally divided into common wheelchairs and special wheelchairs, the common wheelchairs generally consist of four parts, namely a wheelchair frame, wheels, a brake device and a seat rest, and the common wheelchairs do not have the functions of climbing stairs and crossing obstacles, so that the application range of the wheelchairs is greatly limited.

Therefore, technicians at home and abroad propose a plurality of special wheelchairs for climbing stairs and crossing obstacles, the types of related devices and patents are various, the wheelchairs mainly comprise three categories, namely a crawler type wheelchair, a wheel set wheelchair, a multi-foot wheelchair and the like, and the functions and application characteristics of the wheelchairs are also beneficial and disadvantageous. When the crawler-type wheelchair turns, the steel ring and the crawler belt have great damage to the ground; when the multi-foot wheelchair walks, the pressure of each wheel (or supporting leg) to the ground is more uniform, but the chair seat fluctuates and bumps along with the wheels (or supporting legs), the gravity center of a rider is continuously changed, and the comfort level is poorer; the wheel set type wheelchair has good running performance in an obstacle-free environment on a flat road surface, but the change of the gravity center is large when going up and down stairs or crossing obstacles, so that passengers feel uncomfortable.

When the special wheelchair climbs a building or crosses obstacles, the mode needs to be switched, the structure of the wheelchair is complex, and the price is expensive. Meanwhile, the seat suspension and the wheel suspension are generally designed in an integrated manner, which means that when the wheels bump, the seat bumps along with the wheels, the center of gravity is easy to shift, so that the comfort level is poor, and the safety is poor when the seat turns, gets over obstacles or goes upstairs or downstairs.

Although some techniques incorporate gyroscopes into the wheelchair structure to increase the balance of the wheelchair. For example, patent CN 106943248A proposes "a multifunctional wheelchair", which uses a gyroscope to measure the inclination of the seat, and uses a transmission structure of chains, gears, worm gears and worms to make the seat ascend or descend on a suspension frame, thereby ensuring the horizontal direction of the seat to a certain extent; however, because the wheels and the seat are on the same suspension structure, only two front wheels or rear wheels can cross obstacles simultaneously, when a single front wheel or rear wheel crosses an obstacle, the operation mode of the gyroscope can be disordered, so that the other front wheel is suspended, and the risk of overturning is caused.

In general, to ensure the adaptability of special wheel chairs for obstacle crossing to various terrains, the wheel suspension and the seat suspension are separated from each other, so that the inclination mode of the wheels and the inclination mode of the seat operate independently, i.e. when the wheels bump, the seat basically keeps horizontal, thereby ensuring the comfort and safety of the wheel chair, which is one of the important issues in the field of wheel chairs.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a multifunctional wheelchair.

In order to achieve the purpose, the invention adopts the following technical scheme:

a multifunctional wheelchair comprises a seat, a seat suspension frame, wheels and wheel suspension beams, wherein the seat suspension frame is a horizontally-placed 'king' frame consisting of three beams and a batten, a vertical groove is fixedly connected outside the seat suspension frame, an L-shaped support beam is fixedly connected to the bottom of the seat, one end, away from the seat, of the L-shaped support beam is sleeved in the vertical groove, the vertical groove is fixedly connected with the L-shaped support beam through bolts, a suspension beam shaft is movably connected inside the middle beam of the seat suspension frame in a penetrating manner, a bearing hole corresponding to the suspension beam shaft is formed in the center of each wheel suspension beam, two ends of each suspension beam shaft are respectively connected in bearing holes of the two wheel suspension beams in a penetrating manner, and two ends of each wheel suspension beam are connected with the wheels through wheel shafts;

the upper surface of the middle cross beam of the chair seat suspension frame is provided with a swing rod, one end of the swing rod is connected with one end of the middle cross beam of the chair seat suspension frame through a swing rod shaft, the other end of the swing rod is connected with two movable pulleys through a clip support, the two movable pulleys are respectively positioned at two sides of the swing rod, the middle part of the swing rod is sleeved with a sliding sleeve, screw holes are arranged at the corresponding positions of the sliding sleeve and the swing rod, a screw rod is sleeved on the screw hole of the sliding sleeve, the screw rod is connected with a motor, the bottom of the motor is provided with a rotating base, and the rotating base is placed on a;

the upper surface of seat support suspension frame both sides crossbeam all is equipped with the steering pulley group, is equipped with fixed pulley on the lateral wall of seat support, and two wheels hanging beam's both ends all are equipped with the cable wire fixed point, and fixed pulley is total 4, and the steering pulley group is total 4 groups, and the cable wire fixed point is total 4, and cable wire fixed point, fixed pulley, steering pulley group and removal pulley are direct to connect gradually through the cable wire, and the connection order of cable wire is: connecting one of the cable fixing points on one wheel suspension beam to a fixed pulley, then connecting a group of steering pulley blocks, then connecting one of the movable pulleys, then connecting another group of steering pulley blocks on the same beam, and then connecting to one cable fixing point on the other wheel suspension beam;

the seat is provided with a handrail, the handrail is provided with a rocker controller, the seat suspension frame is also provided with a driving system and a balance adjusting system, the balance adjusting system consists of a solid-state precise gyroscope, an acceleration sensor and a servo control system, the driving system comprises a transmission rod and a motor, the balance adjusting system is a balance adjusting system used by the existing common FGHGF model balance car, the driving system is a driving system used by the existing common BZ-6401 model electric wheelchair, and the connection structure is not repeated.

Preferably, the steering pulley block comprises at least one horizontal pulley and one vertical pulley, and the horizontal pulley and the vertical pulley are connected to the seat suspension frame through the door-shaped support.

Preferably, the fixed pulley is also connected to the seat by a portal frame.

Preferably, the sliding sleeve, the swinging rod and the screw rod are made of high-strength hard alloy steel.

Preferably, the steel cord is made of a bundle of high strength abrasion resistant steel wires.

Preferably, the servo control system is electrically connected with the motor, and the transmission rod is connected with the wheel shaft. The driving system, the balance adjusting system and the motor are electrically connected with the rocker controller.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts the pulley combination of the fixed pulley, the steering pulley block and the movable pulley, connects the chair seat, the chair seat suspension frame and the wheel suspension beam through the steel cable, measures the inclination signal of the chair seat through the balance adjusting system when climbing stairs or crossing obstacles, adjusts the swinging direction of the swinging rod through the motor and the screw rod according to the inclination signal, leads the steel cable at the front part and the rear part of the wheelchair to be in a loose state and a tensioned state respectively, adjusts the vertical distance between the chair seat and the front and rear wheels, realizes the forward tilting or backward tilting action of the chair seat, keeps the chair seat and the chair seat suspension frame to be basically kept in the horizontal direction, ensures the stability of the center of gravity, and further improves the comfort level and the safety when climbing stairs and crossing obstacles. The biggest improvement of the invention is that the suspension system of the wheels, the wheel suspension beam, the suspension system of the seat and the seat suspension frame are independent, the inclination modes of the suspension system of the wheels and the seat suspension frame are independent, when the wheels bump, the seat is basically horizontal, all the wheels can safely land, the stress of all the wheels is relatively balanced, and the suspension of the wheels and the overturning risk caused by the suspension of the wheels can not occur.

Drawings

FIG. 1 is a schematic view of the structure and connection of a multifunctional wheelchair according to the present invention;

FIG. 2 is a schematic view of a seat of the multi-function wheelchair according to the present invention;

FIG. 3 is a first side view of a multi-function wheelchair in accordance with the present invention;

FIG. 4 is a second side view of the multi-function wheelchair of the present invention;

FIG. 5 is a schematic view of the connection of the movable pulley of the multifunctional wheelchair according to the present invention;

FIG. 6 is a schematic view of the connection of the steering pulley block of the multifunctional wheelchair according to the present invention;

FIG. 7 is a schematic view of the operation of a multi-functional wheelchair in accordance with the present invention;

in the figure: the device comprises a seat 1, a seat 2 suspension frame, wheels 3, wheel 4 suspension beams, a vertical groove 5, a support beam 6L, a suspension beam shaft 7, a wheel shaft 8, a swing rod 9, a swing rod shaft 10, a square support 11, a movable pulley 12, a sliding sleeve 13, a screw 14, a motor 15, a rotating base 16, a fixed pulley 17, a steel cable fixing point 18, a steel cable 19, a handrail 20, a rocker controller 21, a door-shaped support 22 and a steering pulley block 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-6, a multifunctional wheelchair comprises a seat 1, a seat suspension frame 2, wheels 3 and wheel suspension beams 4, wherein the seat suspension frame 2 is a horizontally-placed 'king' frame composed of three cross beams and a batten, a vertical groove 5 is fixedly connected to the outside of the seat suspension frame 2, an L-shaped support beam 6 is fixedly connected to the bottom of the seat 1, one end of the L-shaped support beam 6, which is far away from the seat 1, is sleeved in the vertical groove 5, the vertical groove 5 is fixedly connected with the L-shaped support beam 6 through a bolt, a suspension beam shaft 7 is movably connected to the inside of a middle cross beam of the seat suspension frame 2 in a penetrating manner, a bearing hole corresponding to the suspension beam shaft 7 is formed in the center of each wheel suspension beam 4, two ends of each suspension beam 7 are respectively connected to bearing holes of two wheel suspension beams 4 in a penetrating manner, and two ends of each wheel suspension beam 4 are connected with the wheels 3 through a wheel shaft 8; the upper surface of the middle cross beam of the seat suspension frame 2 is provided with a swing rod 9, one end of the swing rod 9 is connected with one end of the middle cross beam of the seat suspension frame 2 through a swing rod shaft 10, the other end of the swing rod 9 is connected with two movable pulleys 12 through a clip support 11, the two movable pulleys 12 are respectively positioned at two sides of the swing rod 9, the middle part of the swing rod 9 is sleeved with a sliding sleeve 13, screw holes are formed in the corresponding positions of the sliding sleeve 13 and the swing rod 9, a screw rod 14 is sleeved on the screw hole of the sliding sleeve 13, the screw rod 14 is connected with a motor 15, the bottom of the motor 15 is provided with a rotating base 16, and the rotating base 16 is placed on a batten of the; the upper surface of 2 both sides crossbeams of seat support suspension frame all is equipped with steering pulley block 23, is equipped with fixed pulley 17 on the lateral wall of seat support 1, and two of two wheel suspension beam 4 all are equipped with cable wire fixed point 18, and fixed pulley 17 is 4 total, and steering pulley block 23 is 4 groups total, and cable wire fixed point 18 is 4 total, and cable wire fixed point 18, fixed pulley 17, steering pulley block 23 and movable pulley 12 directly connect gradually through cable wire 19, and the connection order of cable wire 19 is: from one of the cable fixing points 18 on one wheel suspension beam 4 to one fixed pulley 17, to a further set of diverting pulley blocks 23, to one of the moving pulleys 12, to a further set of diverting pulley blocks 23 on the same beam, to a further cable fixing point 18 on the other wheel suspension beam 4; the seat 1 is provided with a handrail 20, the handrail 20 is provided with a rocker controller 21, the seat suspension frame 2 is further provided with a driving system and a balance adjusting system, the balance adjusting system consists of a solid-state precise gyroscope, an acceleration sensor and a servo control system, the driving system comprises a transmission rod and a motor, the balance adjusting system is a balance adjusting system used by a conventional balance car, the driving system is a driving system used by a conventional electric wheelchair, and the connection structure is not repeated.

Referring to fig. 1, 5 and 6, the steering pulley block 23 at least comprises a horizontal pulley and a vertical pulley, the horizontal pulley and the vertical pulley are connected to the seat suspension frame 2 through the door-shaped support 22, the fixed pulley 17 is also connected to the seat 1 through the door-shaped support 22, the groups of pulleys are fixed through a simple support structure, the fixing mode can adopt a spot welding mode, and meanwhile, the groups of pulleys are positioned on the door-shaped support 22 or the clip-shaped support 11, so that the pulleys are prevented from falling off.

Referring to fig. 1, the sliding sleeve 13, the swinging rod 9 and the screw 14 are made of high-strength hard alloy steel, and the steel cable 19 is made of high-strength wear-resistant steel wires in a bundling manner, so that the structural stability and the service life of the wheelchair are improved.

Referring to fig. 1, the servo control system is electrically connected to the motor 15, and the transmission rod is connected to the wheel shaft 8. The driving system, the balance adjusting system and the motor 15 are electrically connected with the rocker controller 21.

The working principle of the invention is as follows: the connection mode of the steel cable 19 is as follows: cable fixing point 18-fixed pulley 17-diverting pulley block 23-moving pulley 12-another diverting pulley block 23-another fixed pulley 17-another cable fixing point 18. As shown in fig. 7-a, when going upstairs, the two front wheels are lifted, at the moment that the seat 1 and the seat suspension frame 2 are tilted backward, the solid-state precision gyroscope and the acceleration sensor automatically measure the tilt angle and the tilt speed, the generated tilt signal is transmitted to the servo control system, the rotation direction and the rotation speed of the motor 15 and the screw 14 are adjusted according to the tilt signal, the screw 14 moves in the swinging rod 9 and the sliding sleeve 13 to drive the swinging rod 9 to swing towards the rear wheel, the cable length between the movable pulley 12 and the steering pulley block 23 of the rear half part of the wheelchair is reduced, correspondingly, the cable length between the steering pulley block 23 and the fixed pulley 17 is increased, the cable 19 of the rear half part of the wheelchair is in a loose state, the cable length between the seat 1 of the rear half part of the wheelchair and the cable fixing point 18 is also increased, the vertical distance between the rear half part of the wheelchair and the rear wheel is increased, and the corresponding vertical distance, namely, the movement mode that the seat 1 inclines forwards is realized, the gravity center of a passenger also shifts forwards, and the safety of going upstairs is improved; as shown in fig. 7-c, when going downstairs, the two front wheels descend, and the principle is similar to the above-mentioned principle, except that the swing rod 9 swings towards the front wheels, so as to realize the motion mode that the seat 1 tilts backwards, and the center of gravity of the passenger shifts backwards, thereby improving the safety of going downstairs; as shown in fig. 7-d, when one front wheel meets an obstacle, the swing rod 9 swings towards the rear wheel, so as to realize the forward-tilting movement mode of the seat 1, and simultaneously, the two fixed pulleys 17 of the front half part of the wheelchair and the corresponding cable fixing points 18 are mutually adjusted in a way that: the vertical distance between the front half part of the wheelchair on one side of the lifted front wheel and the front wheel is reduced, and the vertical distance between the front half part of the wheelchair on one side of the non-lifted front wheel and the front wheel is increased, so that the front half part of the wheelchair is inclined forwards, and the inclined mode from one side of the non-lifted front wheel to one side of the lifted front wheel is also adopted, so that the chair seat 1 and the chair seat suspension frame 2 are basically kept in the horizontal direction in the obstacle crossing process, and through the connection mode of the pulley steel cable, all the wheels can land when the obstacle crossing, and the overturning risk caused by the suspension of the wheels is avoided; as shown in fig. 7-b, when driving on level ground, without tilting, the oscillating lever 9 is stationary and travels like a normal wheelchair.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A multifunctional wheelchair comprises a seat (1), a seat suspension frame (2), wheels (3) and wheel suspension beams (4), and is characterized in that the seat suspension frame (2) is a horizontally-placed 'king' shaped frame consisting of three cross beams and a ribbon board, a vertical groove (5) is fixedly connected outside the seat suspension frame (2), an L-shaped supporting beam (6) is fixedly connected at the bottom of the seat (1), one end, far away from the seat (1), of the L-shaped supporting beam (6) is sleeved in the vertical groove (5), the vertical groove (5) is fixedly connected with the L-shaped supporting beam (6) through bolts, a suspension beam shaft (7) is movably connected in the middle cross beam of the seat suspension frame (2) in a penetrating manner, bearing holes corresponding to the suspension beam shaft (7) are formed in the central part of the wheel suspension beams (4), and two ends of the suspension beam shaft (7) are respectively connected in bearing holes of the two wheel suspension beams (4), both ends of each wheel suspension beam (4) are connected with wheels (3) through wheel shafts (8);

the upper surface of the middle cross beam of the seat suspension frame (2) is provided with a swing rod (9), one end of the swing rod (9) is connected to one end of the middle cross beam of the seat suspension frame (2) through a swing rod shaft (10), the other end of the swing rod (9) is connected with two movable pulleys (12) through a clip-shaped support (11), the two movable pulleys (12) are respectively positioned at two sides of the swing rod (9), the middle part of the swing rod (9) is sleeved with a sliding sleeve (13), screw holes are formed in corresponding positions of the sliding sleeve (13) and the swing rod (9), a screw rod (14) is sleeved with the screw hole of the sliding sleeve (13), the screw rod (14) is connected with a motor (15), the bottom of the motor (15) is provided with a rotating base (16), and the rotating base (16) is placed on a batten of the seat suspension frame (2);

the upper surface of seat support suspension frame (2) both sides crossbeam all is equipped with steering pulley block (23), be equipped with fixed pulley (17), two on the lateral wall of seat support (1) the both ends of wheel mounted beam (4) all are equipped with cable wire fixed point (18), fixed pulley (17) are total 4, steering pulley block (23) are total 4, cable wire fixed point (18), fixed pulley (17), steering pulley block (23) and movable pulley (12) are direct to connect gradually through cable wire (19), the connection order of cable wire (19) is: from one of the cable fixing points (18) on one wheel suspension beam (4) to a fixed pulley (17), to a further set of diverting pulley blocks (23), to one of the moving pulleys (12), to a further set of diverting pulley blocks (23) on the same beam, to a further cable fixing point (18) on the other wheel suspension beam (4);

the chair is characterized in that a handrail (20) is arranged on the chair seat (1), a rocker controller (21) is arranged on the handrail (20), a driving system and a balance adjusting system are further arranged on the chair seat suspension frame (2), the balance adjusting system is composed of a solid-state precise gyroscope, an acceleration sensor and a servo control system, and the driving system comprises a transmission rod and a motor.

2. Multifunction wheelchair in accordance with claim 1, characterized in that the diverting pulley set (23) comprises at least one horizontal and one vertical pulley, which are connected to the seat suspension frame (2) by means of a portal frame (22).

3. Multifunction wheelchair in accordance with claim 1 or 2, characterized in that the fixed pulley (17) is connected to the seat (1) by means of a portal frame (22).

4. Multifunction wheelchair in accordance with claim 1, characterized in that the sliding sleeve (13), the rocking lever (9) and the screw (14) are made of high strength hard alloy steel.

5. Multifunction wheelchair in accordance with claim 1, characterized in that the wire cables (19) are made of bundles of high strength wear resistant steel wires.

6. Multifunction wheelchair in accordance with claim 1, characterized in that the servo control system is electrically connected to an electric motor (15) and the transmission rod is connected to the wheel axle (8); the driving system, the balance adjusting system and the motor (15) are electrically connected with the rocker controller (21).