CN205515253U - Building wheelchair is climbed to two tracks of single section based on swing of walking wheel - Google Patents

Abstract

The utility model discloses a single-section double-track stair climbing wheelchair based on the swing of walking wheels. The crawler climbing mechanism described above is a left-right symmetrical double crawler mechanism, which is composed of crawler mechanisms on both sides, a crawler drive motor and a second reduction device; the large wheel swing arm mechanism can realize the smooth conversion of the motion state. The utility model cleverly combines the hand push wheelchair with the crawler climbing mechanism. The external dimension is the same as that of the ordinary hand push wheelchair. The crawler stair climbing mechanism can be installed under the wheelchair seat to meet the requirements of the center of gravity when climbing stairs, and at the same time reduce the overall center of gravity when climbing stairs, making the occupants feel safer.

Description

A single-section double-track stair climbing wheelchair based on the swing of the walking wheel

technical field

The utility model relates to a stair-climbing wheelchair, in particular to a mechanical structure of a wheel-shoe compound stair-climbing wheelchair.

Background technique

The current four-wheeled wheelchair is an indispensable means of transportation for the elderly, infirm and those with lower limb disabilities. However, the four-wheeled wheelchair cannot go up and down stairs, which limits the scope of use. Wheelchair users living in buildings without elevators cannot go up and down stairs, which affects their Go out and participate in social activities. my country has rapidly entered an aging society, and the travel problems of the elderly have become increasingly prominent.

In order to solve the problems referred to above, split and integrated wheel-track composite stair-climbing wheelchairs have appeared on the market.

The split-type structure is to fix the ordinary wheelchair on the crawler for climbing stairs. For example, Chinese patent CN201020122939.2 discloses an electric crawler stair climbing vehicle. Go up and down stairs or outside steps together in a wheelchair. It is to set the wheelchair carrier frame at the rear of the rectangular crawler chassis. The wheelchair carrier frame includes a longitudinal beam and a load bar. The lower end of the longitudinal beam is connected to the chassis in rotation; Cross at right angles. The defects of this patent are: firstly, it is necessary to repeatedly disassemble and assemble the stair climbing car and wheelchair when walking on flat ground or climbing stairs, which is bulky; when going out, it needs to be carried by others; secondly, when the platform turns, the wheelchair is backward Tilting, the front-to-back distance is too long, and the operator behind the wheelchair needs standing space, which makes it very difficult for the entire wheelchair to turn on the platform; the third is: the whole process needs to be followed by an accompanying person, and the disassembly and assembly process requires others to operate, and climbing Others are also operating the stairs, especially at the half-floor platform of the stairs. Since there is no anti-tilt device, people need to support the crawlers slowly from the stairs to the flat ground.

The one-piece crawler stair climbing wheelchair has the following options:

1. The stair-climbing wheelchair disclosed in Chinese patent CN201210590075.0 can only be lifted or lowered as a whole because the crawler belt cannot be folded, so that the front and rear dimensions of the wheelchair are relatively large, resulting in poor passability of the wheelchair at the half-floor platform of the stairs.

2. In the stair climbing wheelchair disclosed in Chinese patent CN201320833460.3, the large walking wheels are installed in the forward position and cannot be used on flat ground, and cannot be operated independently by the operator.

3. The stair-climbing wheelchair disclosed in Chinese patent CN201510048349.7 cannot pass through the obtuse angle (angle greater than 90 degrees and less than 180 degrees) and the reflex angle (angle greater than 180 degrees) of the stairs under the operator's own operation .

4. The stair-climbing wheelchair disclosed in Chinese patent 201510594011.1 has a complex structure, and does not mention the passage method at the superior corner of the stairway, and the stair-climbing scheme is poor in feasibility.

5. An Italian one-piece wheel-track composite stair-climbing wheelchair named "Explorer Stair Climbing Car" can climb stairs smoothly and flexibly and walk peacefully under the independent operation of the occupant, but it has more than 4 moving mechanisms, and the structure Complex, bulky, and poor corridor passability, it is difficult to apply to ordinary residential buildings, and the cost is high, so it is not easy to promote and use.

Utility model content

The purpose of this utility model is in order to solve the above-mentioned problem, has proposed a kind of single section double crawler belt stair-climbing wheelchair based on the swing of walking wheel.

The purpose of this utility model is achieved by the following technical solutions:

A single-section double-track stair-climbing wheelchair based on the swing of walking wheels, which includes a wheelchair main body, two large walking wheels and a crawler-track stair climbing mechanism; Two universal wheels are installed on the front bottom of the wheelchair frame; it is characterized in that it also includes a large wheel swing arm mechanism, wherein:

The main body of the wheelchair is directly installed and fixed on the crawler mechanism; the crawler climbing mechanism is a symmetrical double crawler mechanism, which is composed of crawler mechanisms on both sides, a crawler drive motor and a second reduction device. The second deceleration device is installed on the crawler mechanism through the mounting bracket, and realizes transmission with the driving wheel shaft of the crawler mechanism. When the crawler drive motor is running, it drives the crawler to rotate to achieve the purpose of climbing stairs;

The two walking bull wheels are installed on the bull wheel swing arm mechanism and are located at the rear and lower part of the wheelchair frame; the bull wheel swing arm mechanism includes a swing arm motor and a first speed reduction device fixed on the crawler climbing mechanism, The output shaft of the first deceleration device is a crankshaft structure. The crankshaft is mounted on the outer fixed plate through bearings and bearing housings. Two large traveling wheels are installed at both ends of the crankshaft. When the swing arm motor is running, the two large traveling wheels are driven to swing up and down. The two big walking wheels can walk on the flat ground when they swing up, and can leave the ground when they are swinging up so that the rubber track can walk on the stairs. The big walking wheels are equipped with hand wheel rings.

Further, the crawler mechanism includes: an outer fixed plate, an inner fixed plate, a driving wheel and a driven wheel; the bottom surfaces of the outer fixed plate and the inner fixed plate are welded together with a track support plate, and the driving wheel is installed on the drive wheel of the crawler mechanism. On the wheel shaft, the driven wheel is installed on the driven wheel shaft of the crawler mechanism, and the driven wheel shaft is provided with a tensioning device;

Further, the rear parts of the outer fixed plate and the inner fixed plate are upturned, and the upturned inner arc is provided with an arc-shaped plate fixing frame and an arc-shaped plate, and the arc-shaped plate makes the rubber track 7 close to the driven wheel, avoiding Open the back of the wheelchair seat.

Further, the crankshaft structure of the bull wheel swing arm mechanism is that the output shaft of the first reduction gear is the swing arm drive shaft, the two ends of the swing arm drive shaft are fixedly connected to the upper swing arm lever, and the swing arm lever is provided with a large walking wheel. axle.

Further, the tensioner device includes a moving block, a fixed block and a screw rod, the moving block is installed on the driven wheel shaft through the shaft hole gap connection, and the distance between the brake block and the fixed block is controlled by rotating the screw rod, so as to achieve the tension of the track. tight purpose.

The work method of the utility model up and down the stairs is:

1. The process of climbing stairs:

1. When the rider rotates the big walking wheel with both hands to reach the stairs, first adjust the direction so that the big walking wheel faces backward and leans against the edge of the first step, and then operates the big wheel swing arm mechanism to swing the big walking wheel to the Leaving the ground, the wheelchair gradually tilts back until the crawler climbing mechanism rests on the edge of the first step, and then operates the crawler climbing mechanism to switch to the reverse normal stair climbing state after crossing the second step;

2. When climbing to the last step, in order to avoid a sudden backward tilt, the crawler climbing should be temporarily stopped, and the passenger simultaneously operates the big wheel swing arm mechanism to make the walking big wheel swing backwards just to land on the ground, and then operate the crawler climbing mechanism Continue to climb the stairs, complete the transition of the center of gravity from the stairs to the flat ground, until the crawler climbing mechanism is completely separated from the last step edge, and then operate the large wheel swing arm mechanism to turn the two walking large wheels on both sides to walk on flat ground or pass half a platform of the stairs.

3. Continue to repeat the above steps 1 and 2 until the desired floor is reached.

Second, the process of going downstairs:

1. When the occupant rotates the large walking wheel with both hands to reach the stairs, first operate the large wheel swing arm mechanism, swing the large walking wheel until the swing arm is parallel to the seat, and at the same time operate the stair climbing mechanism to run downstairs. After the center of gravity crosses the first step edge, stop the crawler climbing mechanism, and operate the big wheel swing arm mechanism to swing the big wheel to the position of the climbing state, and then drive the crawler climbing mechanism to run smoothly down the stairs;

2. When the crawler climbing mechanism is about to break away from the last step, stop the crawler climbing, first operate the large wheel swing arm mechanism to make the large wheel swing down to the ground, and continue to swing down to the position of the flat ground, and walk on the flat ground or pass Stairs half landing.

3. Continue to repeat the above steps 1 and 2 until the desired floor is reached.

The positive effect of the present utility model is,

1. Cleverly combine the hand push wheelchair with the crawler climbing mechanism, no need to disassemble when walking on flat ground or going up and down stairs, and it is more convenient to go out with the characteristics of large walking wheels and flexible turning;

2. The external dimension is the same as that of ordinary hand-push wheelchairs, so it has good corridor passability and can be applied to ordinary residential buildings with relatively narrow spaces;

3. The utility model only needs to use the large wheel swing arm mechanism to realize the smooth transition of the motion state and the anti-overturning at the superior angle. The utility model has a simple structure and relatively low cost, and has good promotion value.

4. The stair-climbing wheelchair of the utility model is a single-section crawler, which does not need to be disassembled on flat ground. It is the same as ordinary hand-push wheelchairs and has good corridor passability.

5. The arc-shaped plate installed in the utility model enables the crawler climbing mechanism to be installed under the wheelchair seat, which meets the requirements of the center of gravity when climbing stairs, and also reduces the overall center of gravity when climbing stairs, making the occupant feel more comfortable. Safety.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the walking state of the utility model on level ground;

Fig. 2 is a three-dimensional schematic diagram of the state of climbing stairs of the utility model;

Fig. 3 is a three-dimensional schematic diagram of the wheelchair main body;

Fig. 4 is a three-dimensional schematic diagram of the crawler mechanism;

Fig. 5 is a three-dimensional schematic view of the tensioning device;

Fig. 6 is a three-dimensional schematic diagram of a large wheel swing arm mechanism;

Fig. 7 is a schematic diagram of the state of the stair climbing process.

Legend, 1-wheelchair body, 2-crawler climbing mechanism, 3-big wheel swing arm mechanism, 4-seat, 5-universal wheel, 6-pedal, 7-rubber track, 8-installation frame, 9-drive motor and second reduction device, 10-drive wheel shaft, 11-drive wheel, 12-outer fixed plate, 13-inner fixed plate, 14-track support plate, 15-arc plate fixing frame, 16-arc Plate, 17-driven wheel, 18-tensioning device, 19-driven wheel shaft, 20-fixed block, 21-screw, 22-moving block, 23-swing arm drive shaft, 24-swing arm motor and first reduction device , 25-arm swing lever, 26-walking bull wheel.

detailed description

Below in conjunction with accompanying drawing, the example of the utility model is further described:

As shown in Figures 1-6: a single-section double-track stair-climbing wheelchair based on the swing of the walking wheels, which includes a wheelchair main body 1, two large walking wheels 26 and a crawler-track stair-climbing mechanism 2; the wheelchair main body 1 is shown in Figure 3 As shown, it is provided with a chair back, a seat seat 4 and a pedal 6 on the wheelchair frame, and two universal wheels 5 are installed on the front and lower part of the wheelchair frame; On the mechanism 2; the crawler climbing mechanism 2 is a symmetrical double crawler mechanism, which is composed of crawler mechanisms on both sides, a drive motor and a second speed reduction device 9, and the drive motor and the second speed reduction device 9 are installed through the mounting frame 8 On the crawler mechanism, and realize transmission with the drive wheel shaft 10 of the crawler mechanism, the crawler drive motor drives the rubber crawler belt 7 to rotate to achieve the purpose of climbing stairs;

It also includes a bull wheel swing arm mechanism 3, and the two walking bull wheels 26 are installed on the bull wheel swing arm mechanism 3 and at the back and below of the wheelchair frame; the bull wheel swing arm mechanism 3 as shown in Figure 6, it includes The swing arm motor and the first deceleration device 24 fixed on the crawler climbing mechanism 2, the output shaft of the first deceleration device is a crankshaft structure, the crankshaft is installed on the outer fixed plate 12 by bearings and bearing seats, and then the above two Two walking bull wheels 26 are installed on crankshaft two ends, drive two walking bull wheels 26 to swing up and down when the swing arm motor is running, two walking bull wheels 26 can walk on the flat ground when they swing down, and can leave the ground to make the rubber track 7 when swinging up. Walk along the stair steps.

Further, described crawler mechanism as shown in Figure 4, it comprises: outside fixed plate 12, inside fixed plate 13, driving wheel 11 and driven wheel 17; Together, the drive wheel 11 is mounted on the drive wheel shaft 10 of the crawler mechanism, the driven wheel 17 is mounted on the driven wheel shaft 19 of the crawler mechanism, and the driven wheel shaft 19 is provided with a tensioning device 18;

Further, the rear parts of the outer fixing plate 12 and the inner fixing plate 13 are upturned, and the inner arc of the upturning is provided with an arc-shaped plate fixing frame 15 and an arc-shaped plate 16, and the arc-shaped plate 16 makes the rubber track 7 Close to driven wheel 17.

Further, the crankshaft structure of the bull wheel swing arm mechanism 3 is that the output shaft of the first reduction gear is the swing arm drive shaft 23, and the two ends of the swing arm drive shaft 23 are fixedly connected to the upper swing arm lever 25, and the swing arm lever 25 is provided with Have the wheel axle that walking bull wheel 26 is installed, see Fig. 6.

Further, the tension member device 18 is shown in Fig. 5, it includes a moving block 22, a fixed block 20 and a screw 21, the moving block 22 is installed on the driven wheel shaft 19 through a gap connection of the shaft hole, and the locking block is controlled by rotating the screw rod 21 22 and the distance between the fixed block 20, so as to achieve the purpose of track tensioning.

The upstairs and downstairs work method of the present utility model is (referring to Fig. 7):

1. The process of climbing stairs:

1. When the occupant rotates the large walking wheel 26 with both hands to reach the stairs, first adjust the direction so that the large walking wheel 26 faces backward and leans against the edge of the first step, and then operates the large wheel swing arm mechanism 3 to make the large walking wheel 26. Swing up until it is off the ground, and the wheelchair is gradually tilted back until the crawler climbing mechanism 2 is placed on the edge of the first step, and then the crawler climbing mechanism 2 is operated to switch to the reverse normal stair climbing state after crossing the second step. ;

2. When climbing to the last step, in order to avoid sudden backward leaning, the crawler climbing should be temporarily stopped, and the passenger simultaneously operates the big wheel swing arm mechanism 3 to make the walking big wheel 26 swing backwards just to land on the ground, and then operate the crawler to climb. The building mechanism 2 continues to climb the stairs, completes the transition of the center of gravity from the stairs to the flat ground, until the crawler climbing mechanism 2 completely breaks away from the last step edge, and then operates the large wheel swing arm mechanism 3 to turn the two side walking large wheels 26 to walk on flat ground or pass the stairs Half level platform.

3. Continue to repeat the above steps 1 and 2 until the desired floor is reached.

Second, the process of going downstairs:

1. When the occupant rotates the big wheel 26 with both hands to reach the stairs, first operate the big wheel swing arm mechanism 3, swing the big wheel 26 up to the swing arm lever 25 parallel to the seat 4, and operate the crawler climbing mechanism 2 at the same time Run downstairs, after the overall center of gravity crosses the first step edge, stop the crawler climbing mechanism 2, and operate the bull wheel swing arm mechanism 3 to swing the walking bull wheel 26 to the position of the stair climbing state, and then drive the crawler climbing mechanism 2 run down the stairs smoothly;

2. When the crawler climbing mechanism 2 is about to break away from the last step, stop the crawler climbing, first operate the big wheel swing arm mechanism 3 to make the walking big wheel 26 swing down to the ground, and continue to swing down to the position of the flat state to walk on the flat ground Proceed to or via stairs to a half-level landing.

3. Continue to repeat the above steps 1 and 2 until the desired floor is reached.

Claims (5)

1. A single-section double-track stair-climbing wheelchair based on the swing of the walking wheel, which includes a wheelchair main body, two large walking wheels and a crawler-track stair climbing mechanism; the wheelchair main body is provided with a chair back, a seat and a pedal on the wheelchair frame Plate, two universal wheels are installed on the front bottom of the wheelchair frame; it is characterized in that it also includes a large wheel swing arm mechanism, wherein: The main body of the wheelchair is directly installed and fixed on the crawler mechanism; the crawler climbing mechanism is a symmetrical double crawler mechanism, which is composed of crawler mechanisms on both sides, a crawler drive motor and a second reduction device. The second deceleration device is installed on the crawler mechanism through the mounting bracket, and realizes transmission with the driving wheel shaft of the crawler mechanism. When the crawler drive motor is running, it drives the crawler to rotate to achieve the purpose of climbing stairs; The two large walking wheels are installed on the large wheel swing arm mechanism and are located at the rear and lower part of the wheelchair frame; The large wheel swing arm mechanism includes a swing arm motor and a first reduction device fixed on the crawler climbing mechanism, the output shaft of the first reduction device is a crankshaft structure, and the crankshaft is installed on the outer fixed plate through the bearing and the bearing seat , Install two large walking wheels at both ends of the crankshaft. When the swing arm motor is running, the two large walking wheels are driven to swing up and down. When the two large walking wheels swing down, they can walk on the flat ground, and when they swing up, they can leave the ground to make the rubber crawler carry the stairs. Walking on steps, with a hand wheel ring on the big walking wheel. 2. The single-section double-track stair-climbing wheelchair based on the swing of the walking wheels as claimed in claim 1, wherein the crawler mechanism comprises: an outer fixed plate, an inner fixed plate, a driving wheel and a driven wheel; an outer fixed plate The bottom surface of the inner fixed plate is welded together with a track support plate, the driving wheel is installed on the driving wheel shaft of the track mechanism, and the driven wheel is installed on the driven wheel shaft of the track mechanism, and the driven wheel shaft is provided with a tensioning device. 3. The single-section double-track stair-climbing wheelchair based on the swing of the walking wheels as claimed in claim 1, wherein the rear parts of the outer fixed plate and the inner fixed plate are upturned, and the inner arc of the upturned An arc-shaped plate fixing frame and an arc-shaped plate are provided, and the arc-shaped plate makes the rubber track 7 close to the driven wheel and avoids the wheelchair seat rear. 4. The single-section double-crawler stair-climbing wheelchair based on the swing of the walking wheels as claimed in claim 1, wherein the crankshaft structure of the bull wheel swing arm mechanism is that the output shaft of the first reduction gear is the swing arm drive shaft , the two ends of the drive shaft of the swing arm are fixedly connected to the upper swing arm rod, and the swing arm rod is provided with an axle for installing the large walking wheel. 5. The single-section double-track stair-climbing wheelchair based on the swing of the walking wheels as claimed in claim 2, wherein the tensioning device comprises a moving block, a fixed block and a screw rod, and the moving block is installed on the On the driven wheel shaft, the distance between the brake block and the fixed block is controlled by rotating the screw, so as to achieve the purpose of track tension.