SU1517961A1 - Wheel-chair - Google Patents

Abstract

The invention relates to equipment for moving sick and disabled people. The purpose of the invention is to reduce the effort in overcoming step obstacles. The wheelchair consists of a base 1 with a seat 2, driven wheels 3, driving wheels 4 connected to the drive 5 and devices for lifting the driving wheels which are mounted on the lateral sides of the base and are made in the form of a rocker arm 6, one shoulder of which is the handle 7, and the other is provided with a roller 8. The drive wheels 4 are made of variable rolling radius of three identical convex arcs 18, which are coupled to each other. 4 il.

Description

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The invention relates to medical technology, in particular to equipment for the movement of patients and disabled people.

The aim of the invention is to reduce the force in overcoming step obstacles.

FIG. 1 shows a general view of a wheelchair; in fig. 2 - section A-.A in FIG. one; in fig. 3 - a wheel chair with the working position of the rollers of the rocker arms, providing the lifting of the drive wheels; in fig. 4 - moving the wheelchair to the stairs.

The wheelchair consists of a base I with a seat 2. The driven wheels 3, leading to xxtes 4, connected to the drive 5 and devices for lifting the driving wheels 4, which are mounted on the lateral sides of the base I and are made in the form of a rocker arm 6 with one arm, Handle 7, and the other shoulder, equipped with a roller 8. Driven wheels 3 fixed sleeves on rotary sleeves 9, on which gear cone wheels 10 are mounted, which are in engagement with fixed sleeves on the base 1 toothed tapered wheels 11, which allows, 1 t 3, the rotation of driven wheels in a vertical plane. To ensure that the seats rotate, such as. 1, in the process of driving, fastened P1K driven wheels 3 on rotary sleeves 9 installed axially 12 axles 12 mounted on brackets 13 driven Ko, iec 3 and having sprockets 14 connected by a chain gear 15 with an asterisk which is fixed on base 1 and on It is equipped with a steering shaft of 17. L, 1 I movement on stepped surfaces of the main wheel 4 are made of variable rolling radius of three identical convex arches 18, which are matched to each other.

Wheelchair ska works as follows.

When descending from a single stepped obstacle, for example from a curbstone, one of the driven wheels 3 is turned by rotating the toothed bevel wheel 1 1 towards the drive wheels. In order to reduce the controls, this rotation of the wheel 3 can be carried out by the steering shaft 17, which must be made removable and in this case mounted on the toothed conical wheel 11. Then, with another driven wheel 3, it slides off the curb stone and it hangs.

five

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its design transition from one

flat surface

since the wheelchair begins to rest on the rotated driven wheel 3. After that, the wheel 3 rotates from the curb and the wheelchair smoothly descends from the obstacle, since the first wheel 3 was already at a lower height from the surface curbstone. Then rotated the driven wheel 3 is set to its original position. The curbstone entry is made by turning one of the driven wheels 3 forward.

Movement on the stairs is made in reverse. In this case, both driven wheels 3 can be rotated forward,

forming a kind of skid that slides down the steps of the stairs. The drive wheels 4 move smoothly, steps to another. When driving on

0, the knobs 7 rotate the rocker arms 6 and the wheelchair is mounted on the rollers 8. In this case, the drive wheels 4 are raised, however, movement can occur due to the drive 5 by touching the surfaces of the drive wheel 4 when they grow. Such an installation of the wheelchair on the rollers 8 makes it possible to turn it almost on one place. If the movement occurs along the street, where the surface is not as smooth as in the rooms, then the movement is carried out on the driving wheels 4.

The rotation of the wheelchair is made by rotating the sprocket 16, which turns the driven wheels 3 along with the axles 12.

Claims (1)

5 Formula of Invention A wheelchair cushion containing a base with a seat, driven wheels that can be rotated in a vertical n, ioccios by means of a manual mechanism, driving wheels, a drive and devices for lifting the driving wheels that are articulated on the sides, differing from By the fact that, in order to reduce the effort in overcoming the stepped obstacles, the driving wheels are made of variable rolling radius of three identical convex arcs mated to each other, and the devices for lifting the driving wheels are rocker arms , with one of the shoulders of each beam 0 is made in the form of a handle, and the other is equipped with a roller. t 12 L P .L