CN205698283U - A kind of wheelchair servo steering device - Google Patents

Abstract

The purpose of this utility model is to provide a wheelchair power steering device, the handle tube and the long vertical tube are connected by pin shafts, the handle tube and the long vertical tube are arranged on the right side tube of the wheelchair frame, and the long vertical tube is installed The first synchronous pulley, the second synchronous pulley and the third synchronous pulley are installed on the intermediate shaft, the fourth synchronous pulley is installed on the extension shaft of the reduction motor, and the first synchronous pulley and the second synchronous pulley are wound on the first synchronous pulley. One synchronous belt, the third synchronous pulley and the fourth synchronous pulley are wound with the second synchronous belt, the first end of the long connecting rod is connected to the steering plate, the steering plate is connected to the intermediate shaft, and the second end of the long connecting rod is connected to the steering rod , the steering rod is connected with the steering rudder, the two ends of the steering rudder are respectively connected with the first short link and the second short link, the first short link is connected with the first front caster, and the second short link is connected with the second front caster . The utility model reduces the effort of the patient when using it, and improves the steering safety and flexibility.

Description

Wheelchair power steering device

technical field

The utility model relates to an auxiliary appliance for the disabled, specifically a wheelchair device.

Background technique

According to incomplete statistics, in 2006, the total number of all kinds of disabled people in my country was about 82.96 million, accounting for 6.34% of the total population of the country. There are a large number of elderly and disabled people with inconvenient lower limbs in today's society, which makes the design of handicapped tools for the purpose of improving their quality of life increasingly important. Electric wheelchair is a good auxiliary tool for people with lower limb disabilities to travel, and it is a necessary equipment to improve their freedom of movement and enable them to better integrate into the lives of healthy people. Due to the limited space, small size and certain speed of the electric wheelchair, the requirements for steering control during the wheelchair are very high. What the existing design steering mechanism adopted is the mode of steering wheel follow-up, drive wheel differential drive or realizes steering control by manpower rotating handle. Most of the current designs not only make the steering of electric wheelchairs deficient in flexibility and smoothness, but also greatly increase the operational burden of the disabled. When the wheelchair travels faster, the requirements for its steering flexibility, ease of operation and safety are higher.

At present, there are many related patents at home and abroad, and the functions are similar. A wheelchair steering mechanism (Patent No. 01105514.6) proposes a wheelchair steering mechanism that utilizes a pair of self-locking worm gears and a four-bar drive train, but the steering mechanism is very laborious for the user. There is no relevant power-assisted mechanism, and the rotation angle controlled by the hand lever cannot be enlarged at the front fork, and the space for the hand lever to rotate is relatively large, which is not conducive to the use of the patient and the safety during use; the electric rehabilitation wheelchair (patent number 201320895698.9 ), proposed a quasi-four-bar steering mechanism based on guide electric push rod control. This mechanism has a simple structure, but it cannot be controlled manually. If the electric cylinder loses power or loses control, it will have an extremely harmful effect on the steering of the wheelchair.

Contents of the invention

The purpose of the utility model is to provide a wheelchair power-assisted steering device which reduces the effort of the patient and improves the steering safety and flexibility.

The purpose of this utility model is achieved in that:

The utility model is a wheelchair power-assisted steering device, which is characterized in that it includes a wheelchair frame, a handle pipe, a long vertical pipe, a long connecting rod, an intermediate shaft, a reduction motor, a steering rudder, a synchronous mechanism, a handle pipe and a long vertical pipe Connected by a pin shaft, the hand grip tube and the long vertical tube are arranged on the right side tube of the wheelchair frame, the hand grip tube is located on the upper layer of the right side tube, and the lower end of the long vertical tube is installed on the right side tube through a bearing. On the lower floor, the first synchronous pulley is installed on the long vertical pipe, the second synchronous pulley and the third synchronous pulley are installed on the intermediate shaft, the fourth synchronous pulley is installed on the extension shaft of the reduction motor, the first synchronous pulley and the second synchronous pulley The first synchronous belt is wound on the second synchronous pulley, the second synchronous belt is wound on the third synchronous pulley and the fourth synchronous pulley, the first end of the long connecting rod is connected to the steering plate, the steering plate is connected to the intermediate shaft, and the long connecting rod The second end of the steering rod is connected to the steering rod, and the steering rod is connected to the steering rudder. The two ends of the steering rudder are respectively connected to the first short link and the second short link. The connecting rod is connected with the second front caster, and the rear caster is installed at the rear of the wheelchair frame.

The utility model can also include:

1. The steering rudder is arc-shaped.

2. Wheelchair cushions and backrests are installed on the wheelchair frame.

The advantage of the utility model is that: the utility model has a two-stage synchronous belt drive, which realizes the enlargement of the rotation angle of the hand lever and has the function of motor assistance. When the patient uses it, it only needs to rotate the handle tube at a relatively small angle. The wheelchair can turn at a certain large angle, and at the same time, with the help of the power-assisted mechanism, it can turn effortlessly, which greatly improves the comfort of the wheelchair; the hand-operated lever mechanism and the angle-magnifying power-assisted mechanism are arranged on the right side of the wheelchair body. and under the seat cushion, which is convenient for users to control and improves the safety of wheelchair use; and the mechanical steering can be controlled by manpower, eliminating the problem that the equipment cannot be used normally due to the loss of control or power failure of the electronic control equipment caused by the electronic control steering , which greatly improves the safety of wheelchair use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a detailed diagram of each mechanism of the power steering device of the present invention;

Figure 3 is a schematic diagram of the installation of the secondary synchronous belt drive;

Figure 4 is a schematic diagram of the installation of the front casters.

detailed description

The utility model is described in more detail below in conjunction with accompanying drawing example:

Combining Figures 1 to 4, and Figures 1 and 2, the hand-operated lever mechanism is composed of a handle tube 6 and a long vertical tube 19. The right side tube of the frame 2, the center of the vertical tube held by the hand is far away from the rotation center of the hand lever, the long vertical tube 19 passes through the bearing with seat in the side tube of the vehicle frame 2 and is bound to the right tube of the wheelchair frame 2 , its upper end is affixed to the handle bar 6 by a pin, and the lower end is constrained on the wheelchair frame 2 by a bearing with seat in the frame tube.

In conjunction with Fig. 1, Fig. 2 and Fig. 3, the described angle magnification booster mechanism is mainly composed of the first synchronous pulley 11, the second synchronous pulley 14, the third synchronous pulley 15, the fourth synchronous pulley 18 and the intermediate shaft 13 It is composed of a worm gear reducer motor 17, wherein the first synchronous pulley 11 is fixed on the long vertical pipe 19 through set screws, and the second synchronous pulley 14 and the third synchronous pulley 15 are fixed on the intermediate shaft 13 in the same way Above, the fourth synchronous pulley 18 is connected with the extension shaft of the worm gear motor 17, and the intermediate shaft 13 has an extension end, which is connected with a similar four-bar mechanism, and is arranged under the wheelchair cushion 4. The quasi-four-bar mechanism is mainly composed of a long connecting rod 7, a steering rudder 8, and a short connecting rod 9. The quasi-four-bar steering mechanism is hinged with the extended end of the power steering intermediate shaft 13 through a long connecting rod 7, and the steering rudder 8 It is designed in an arc shape, and is hinged to the short connecting rod 9 fixed on the front casters 10, and drives the two front casters 10 to rotate under the action of the power steering mechanism. The first synchronous pulley 11 is fixed on the long vertical pipe through set screws, and the second synchronous pulley 14 is fixed on the top of the intermediate shaft 13 in the same way. The first synchronous pulley 11 and the second synchronous pulley 14 is driven by the first synchronous belt 12. The fourth synchronous pulley 18 is fixed on the lower part of the intermediate shaft 13 through set screws, the third synchronous pulley 15 is connected to the worm gear reducer motor 17 to extend the shaft, the third synchronous pulley 15 and the fourth synchronous pulley 18 is driven by the second synchronous belt 16.

The utility model is mainly composed of a wheelchair body, a hand lever mechanism, an angle magnifying booster mechanism, and a similar four-bar steering mechanism.

The wheelchair body is driven by the rear axle motor arranged at the rear of the wheelchair, and the rear large wheels are installed on both sides of the rear axle motor to realize the moving function of the wheelchair. The steering function of the wheelchair body.

The hand lever mechanism is composed of a hand grip tube and a long vertical tube. The two are fixedly connected by a pin passing through the two tubes. They are both arranged on the right side tube of the wheelchair body. For larger distances, the long standpipe passes through the bearing with seat in the frame tube and is constrained to the right side tube of the wheelchair frame. .

The angle magnifying booster mechanism is mainly composed of the first-fourth synchronous pulleys, the intermediate shaft and the worm gear reducer motor. The synchronous pulleys are all fixedly connected on the intermediate shaft in the same way, and the fourth synchronous pulley is connected with the extension shaft of the worm gear motor, and the intermediate shaft has an extended end, which is connected with the four-bar mechanism, and is arranged under the wheelchair seat cushion.

The quasi-four-bar mechanism is mainly composed of a long connecting rod, a steering rudder, and a short connecting rod. The quasi-four-bar steering mechanism is hinged with the extended end of the intermediate shaft of the power steering mechanism through a long connecting rod. The steering rudder is designed in an arc shape and is hinged on the The short link fixed on the front casters drives the two front casters to rotate under the action of the power steering mechanism.

The first synchronous pulley is fixed on the long vertical pipe through set screws, the second synchronous pulley is fixed on the upper part of the intermediate shaft in the same way, and the first synchronous pulley and the second synchronous pulley are driven by a synchronous belt.

The fourth synchronous belt pulley is fixedly connected to the lower part of the intermediate shaft through a set screw, the third synchronous belt pulley is connected to the extension shaft of the worm gear reduction motor, and the third synchronous belt pulley and the fourth synchronous belt pulley are driven by a synchronous belt.

The utility model relates to a wheelchair power-assisted steering device, which comprises a hand-operated lever mechanism, an angle magnifying power-assisted mechanism, a quasi-four-bar steering mechanism, and a wheelchair body. Among them, the hand lever mechanism is arranged on the right side tube of the wheelchair body, the center of the handle tube is far away from the rotation center of the hand lever, and the long vertical tube passes through the bearing with seat and is bound to the right tube of the wheelchair frame. , the upper end of which is connected to the hand lever, the lower end is constrained on the wheelchair frame through a bearing with a seat, and the first synchronous pulley is fixedly connected to the lower end; the wheelchair body consists of a wheelchair frame, a wheelchair seat cushion, a wheelchair back cushion, and a rear axle motor. The rear large wheel and the front caster are composed of; the angle magnification power-assisted mechanism is connected between the hand lever mechanism and the similar four-bar steering mechanism, in which the second synchronous pulley and the third synchronous pulley are fixedly connected The synchronous pulley is connected with the extension shaft of the worm gear reducer motor, the first synchronous pulley and the second synchronous pulley are driven by the synchronous belt, the third synchronous pulley and the fourth synchronous pulley are driven by the synchronous belt, and are arranged on the wheelchair seat cushion Below; the similar four-bar steering mechanism is hinged with the intermediate shaft of the power steering mechanism through a long connecting rod. The front casters swivel.

The fourth synchronous pulley is affixed to the extension shaft of the worm gear motor, the first synchronous pulley is affixed to the long vertical pipe in the hand lever mechanism, the second synchronous pulley and the third synchronous pulley are respectively affixed to the The intermediate shaft is a two-stage synchronous belt drive composed of the first synchronous pulley, the second synchronous pulley, the third synchronous pulley and the fourth synchronous pulley, which realizes the enlargement of the rotation angle of the hand lever and has a motor-assisted Function, the patient only needs to turn the handle tube at a relatively small angle to turn the wheelchair at a certain large angle when using it, and at the same time, with the help of the power-assisted mechanism, the turning action can be performed with less effort, which greatly improves the comfort of the wheelchair.

The hand lever mechanism and the angle magnifying booster mechanism are arranged on the right side tube of the wheelchair body and under the seat cushion, which is convenient for the user to control and improves the safety of the wheelchair. The mechanical steering can be controlled by manpower, which eliminates the problem that the equipment cannot be used normally due to the loss of control or power failure of the electronic control equipment caused by the electronic control steering, and greatly improves the safety of the wheelchair.

Claims (3)

1. a wheelchair servo steering device, is characterized in that: include wheelchair frame, hold pipe, long vertical tube, Long connecting rod, jackshaft, reducing motor, turn to rudder, lazy-tongs, hold Guan Yuchang vertical tube by bearing pin phase Even, hold pipe and long vertical tube is arranged on the right edge pipe of wheelchair frame, hold pipe and be positioned at the upper of right edge pipe Layer, the bottom of long vertical tube is arranged on the lower floor of right edge pipe by bearing, and long vertical tube is installed the first synchronization Belt wheel, jackshaft is installed the second synchronous pulley and the 3rd synchronous pulley, and the projecting shaft of reducing motor is installed The first Timing Belt, the 3rd Timing Belt it is wound around on 4th synchronous pulley, the first synchronous pulley and the second synchronous pulley Wheel and the 4th synchronous pulley on be wound around the second Timing Belt, long connecting rod first end connect direction turning piece, direction turning piece with Jackshaft is connected, and the second end of long connecting rod connects turning-bar, and turning-bar is connected with turning to rudder, turns to the two of rudder Individual end connects the first short connecting rod and the second short connecting rod respectively, and the first short connecting rod connects the first front truckle, and second Short connecting rod connects the second front truckle, and rear truckle is installed at the rear of wheelchair frame.

A kind of wheelchair servo steering device the most according to claim 1, is characterized in that: described turns to Rudder is circular arc.

A kind of wheelchair servo steering device the most according to claim 1 and 2, is characterized in that: wheel-chair Wheel chair cushions and backrest are installed on frame.