EA029894B1 - Device for moving wheelchair over steps of stairway - Google Patents

Abstract

The invention relates to a device for moving a wheelchair with a disable human sitting therein over steps of a stairway. The device for moving a wheelchair over steps of a stairway comprises a caterpillar unit with a support frame that carries a gear motor, an undercarriage with caterpillar belts, a steering column linked to the caterpillar unit and to the back support of the wheelchair wheels, and provided with a post with components that control movement of the caterpillar unit. A novel feature is that the support frame is non-detachable, and the steering column base is provided with a box device that is widened as compared to the steering column post and is linked fixedly to said post and said back support, the latter being connected to two opposite walls of the box device. The technical result consists in higher reliability of the device.

Description

The invention relates to a device for moving along the steps of a staircase of a wheelchair in which a person with disabilities may be located. The device for moving a wheelchair along the steps of a flight of stairs contains a crawler assembly with a carrying frame on which a gear motor is installed, a running gear with crawler ribbons, a steering column connected to the crawler assembly and a rear wheel support for the wheels of a wheelchair, while equipped with a rack with elements control the movement of the tracked unit. New is that the supporting frame is made permanent, and the base of the steering column is equipped with a box-shaped device, made extended with respect to the rack of the steering column and fixedly connected to the said rack and rear support, the latter of which is connected to two opposite walls of the box-shaped device. The technical result is to increase the reliability of the device.

029894 Β1

029894 Β1

029894

Technical field

The invention relates to a device for moving along the steps of a staircase of a wheelchair in which a person with disabilities may be located.

Prior art

A significant and urgent problem is the creation of a habitat accessible in society for all people, especially for people with disabilities. One of the aspects of creating an accessible habitat is the movement of people with disabilities in wheelchairs along the steps of staircases. Currently known devices that allow people with disabilities to navigate the steps of the flight of stairs. The mentioned devices differ from each other both in adaptation to a person and in their design, which makes it possible to apply them, especially with regard to their universality and mobility.

The closest to the claimed technical solution is a device for moving a wheelchair on the feet of a flight of stairs (the closest analogue is the catalog of the Italian company U1MES, represented on the Internet by AirTestCy.gi / Topype-Royetshkt). The device contains a carrier frame, an autonomous power source, a steering column and a working mechanism. The working mechanism consists of an electric motor, a gearbox, tracked thrusters, a wheel for fast movement in a straight section, an electrical system and a charging device for a battery. The above-described device is operational, while it has relatively small dimensions, i.e. made compact.

The disadvantages of the above-described device include the implementation of a detachable support frame, since its elements are connected to each other by a detachable connection. Such attachment reduces the rigidity of the carrier frame, which leads to instability of the geometry of the entire device in the process of assembling it, and also reduces stability in the process of moving the wheelchair along the steps of the flight of stairs. The steering column is fixed on the frame elements of the carrier frame, has three closely spaced attachment points. The rear support is installed on the rack of the steering column by means of a horizontal C-shaped bracket and has insufficient rigidity due to the short attachment length. Insufficient rigidity of the power circuit caused by gaps and movements in the zone of return deformations of structural elements, for example, a backrest lock and steering column, rear support and carrier frame, reduces the stability of the device and generates a sense of danger (anxiety) in the user.

DISCLOSURE OF INVENTION

The objective of the invention is aimed at creating a reliable and sustainable device for lifting and moving a wheelchair along the steps of a flight of stairs.

The technical result is to increase the reliability of the device designed to move a wheelchair along the steps of a flight of stairs.

To achieve a technical result, the device for moving a wheelchair along the steps of a flight of stairs contains a crawler assembly with a carrying frame on which a gear motor is installed, a running gear with crawler ribbons, a steering column connected to the crawler assembly and a rear wheel support for the wheels of a wheelchair, equipped with a rack with elements of motion control of a caterpillar assembly according to the invention, the supporting frame is made permanently, and the base of the steering column is provided with a box-shaped device, you complete extended with respect to the rack of the steering column and fixedly connected with said rack and rear support, the latter of which is connected with two opposite walls of the box-shaped device.

The rear support can be installed in the holes of the opposite walls of the box-like device and fixedly connected to the said walls by means of a welding joint.

The box-shaped device of the base of the steering column can be equipped with a protrusion at the top for connection with the upright steering column.

The supporting frame can be made of aluminum plates and profiles.

The box-shaped device can be provided with a latch, made with the possibility of fixing the box-shaped device relative to the supporting frame.

Brief description of explanatory figures

FIG. 1 is a schematic representation of the proposed device for moving a wheelchair along the steps of a flight of stairs.

FIG. 2 is a schematic representation of the proposed device with a wheelchair attached to it with a person.

FIG. 3 shows the main components of the proposed device.

FIG. 4 shows the main components of the proposed device with a platform assembly.

FIG. 5- shows an explosion diagram of a tracked unit.

FIG. 6 shows the main components of the steering column and platform.

FIG. 7 shows a local section of the base of the steering column (section A-A of FIG. 3, enlarged view).

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FIG. 8 shows a local section of the base of the steering column (section BB of Fig. 3, enlarged view).

The figures represent:

1 - a device for moving a wheelchair along the steps of a flight of stairs;

2 - wheelchair;

3 - steps of a flight of stairs;

4 - steering column;

5 - base of the steering column;

6 - tracked unit;

7 - protective casing;

8 - bearing frame;

9 - gear motor;

10 - rechargeable battery;

11 - shaft;

12 - driving pulleys;

13 - tracked belts;

14 - supporting rollers;

14a — axis of the support rollers;

15 - tension pulleys;

16 - supporting pulleys;

17 - axis;

18 - wheels;

19 - stand;

20 - ledge;

21 - box device;

21a — wall of box device;

21b — box wall device;

22 - rear support;

22a - the central portion of the rear support;

22b — peripheral region;

22c — peripheral portion;

23 - wheelchair wheel;

24 - handles;

25 - retainer;

26 - people with disabilities;

27 - platform;

28 - tubular device;

29 - accompanying person;

30 - spring latch.

Description of the technical solution

The device 1, designed to lift and move the wheelchair 2 along the steps 3 of a flight of stairs, contains a steering column 4 connected through its base 5 with a track-mounted aggregate 6.

The caterpillar unit 6 is made according to a closed scheme, inside of which the working mechanism is placed with an electric drive, closed with a protective cover 7. The caterpillar unit 6 contains a supporting frame 8, on which a gear motor 9 is installed, equipped with a DC motor and a worm gearbox; battery 10; tracked undercarriage 13.

The crawler assembly 6 is set in motion by transferring the torque of the gearmotor 9 to the chassis, namely via the shaft 11 and the driving pulleys 12 onto the crawler belts 13 located on opposite sides of the supporting frame 8. Fastening the gearmotor 9 flange and driving pulleys 12 is carried out using detachable connections. In the process of movement of the device 1, the track belts 13 move through the drive pulleys 12, the support rollers 14, the tension 15 and the support 16 pulleys mounted on the base frame 8. The tension adjustment of the track 13 is ensured by the fact that the pulleys 15 are mounted on the axis 17, which by means of the threaded connection has the ability to move in the direction of increasing the length of the track 13.

For fast movement on flat horizontal surfaces in the caterpillar unit 6 wheels 18 are provided that are fixed on the balance bar axis.

Bearing frame 8 is made one-piece and made of alloy metal plates and profiles, non-detachable interconnected by means of a welding joint, which increases the rigidity of the carrier frame 8, thereby leading to a stable geometry of the device 1 during assembly and operation, to increase the stability of the device 1 the process of lifting and moving a wheelchair 2 up the stairs 3 of a flight of stairs. In a specific example of execution, the carrier

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frame 8 is made of aluminum plates and profiles.

The steering column 4, which performs the function of controlling the movement of the device 1, contains a rack 19 mounted on a corresponding response protrusion 20 fixedly connected, for example, with a welding joint, to a box-shaped device 21 of the base 5. In this case, the post 19 covers said protrusion 20 and tightly without clearance it mates. The rack 19 and the protrusion 20 are additionally fixed relative to each other by a threaded connection preventing their separation along the longitudinal axis δ of the rack 19. In the specific example of execution, the protrusion 20 and the rack 19 are tubular with a transverse rectangular profile, which prevents their mutual turning during the operation of the device 1. And as a threaded connection can be used screw. The box-shaped device 21 is fixedly connected to the stand 19 by means of a protrusion 20.

The box-shaped device 21 is made volumetric and expanded with respect to the rack 19. At the same time, the box-shaped device 21 in cross section (across the longitudinal axis δ) has larger dimensions than the said rack 19.

The steering column 4 is provided with a rear support 22 for the wheels 23 of the wheelchair 2. The rear support 22 is fixedly connected to the box-shaped device 21, namely to its two opposite walls 21a and 21b. In a specific example of execution, said opposite walls 21a and 21b are provided with openings in which rear support 22 is located, while the central portion 22a of the rear support 22 is located inside the box-shaped device 21, and the oppositely located two peripheral sections 22b and 22c of the rear support 22 are located outside a box-shaped device 21 with the possibility of the wheels 23 of the wheelchair 2 being supported therein. The rear support 22 is permanently connected along the circumference of the holes in which it is installed with the walls 21a and 21b, for example, arched junction.

The above-described construction of the box-like device 21, with respect to the design of the closest analogue, allows increasing the distance b between the connection sections of the rear support 22 with the walls 21a and 21b, which increases the reliability of the connection of the rear support 22 with the steering column 4, eliminates gaps in the above-mentioned connection zones and improves stability the device 1 in the process of raising and moving the wheelchair 2 along the steps 3 of a flight of stairs. At the same time, the wheelchair 2, relying on the back support 22, occupies a reliable stable position.

The base 5 of the steering column 4 performs the function of an intermediate device between the caterpillar unit 6 and the rack 19 of the steering column 4, on which two handles 24 are fixed with the controls for the movement of the caterpillar unit 6.

The box-shaped device 21 of the base 5 of the steering column 4 is connected to the caterpillar assembly 6 by means of a bracket covering the axis 14a of the support roller 14 and having quick-detachable elements in the form of a wing nut. The said axis 14a is fixedly connected, for example, by a welding connection, to the carrier frame 8. In the back part of the device 1, a spring latch 30 is installed, mounted on the box-shaped device 21 with the possibility of fixing the latter relative to the carrier frame 8 in the working position of the device 1. For carrying out the service works the latch 30 can be released and the box-shaped device 21 can be folded forward and disconnected from the tracked unit 6. The device 1 can be equipped with a lock 25 for a wheelchair 2 and a seat belt, mounted on the rack 19 of the steering column 4, which increases the safety of the person 26 with disabilities, transported in a wheelchair 2.

The device 1 can also be equipped with a platform 27 for mounting a wheelchair 4. The platform 27 consists of two flattened or lamellar horizontally elongated elements that a wheelchair 2 can drive into with wheels 23. In a specific example of execution, platform 27 is connected to a curved tubular device 28 connected threaded connection with the base 5 of the steering column 4. This design allows you to disconnect the platform 27 from the steering column 4 as needed.

Device 1 operates as follows.

A wheelchair 2 with a disabled person 26 is placed above the crawler assembly 6 and the wheelchair 2 is moved until the wheels 23 of the rear support 22 are touched. Then the backrest 25 secures the back of the wheelchair 2 to the column 19 of the steering column 4. Next, the accompanying person 29, located behind the wheelchair 2 and holding the control handles 24, tilts the device 1 with the wheelchair 2 installed and, using the wheels 18, moves the device 1 to the steps 3 of the flight of stairs. The switch sets the mode of movement up or down, and when the mode is "down", the track belts 13 are lowered until they come into contact with the steps 3. The control button located on the handles 24 turns on the gearmotor 9 and moves the wheelchair 2 down the steps 3 of a flight of stairs .

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Industrial Applicability

The invention relates to a device 1 for moving along the steps 3 of a flight of stairs of a wheelchair 2, in which there can be a person 26 with disabilities. The above-described design of the device 1 is characterized by increased stability and ensures the stability of the wheelchair 2 mounted on it in the process of its lifting and moving along the steps 3 of the flight of stairs. In General, is achieved by improving the reliability of the device 1.

Claims (4)

CLAIM 1. A device for moving a wheelchair along the steps of a flight of stairs, comprising a crawler unit (6) with a carrier frame (8) on which a gearmotor (9), a running gear with crawler belts (13), a steering column (4) are installed, associated with the crawler assembly (6) and the rear support (22) for the wheels (23) of the wheelchair (2), while equipped with a pillar (19) with controls for the movement of the caterpillar assembly (6), characterized in that the supporting frame (8) made one-piece, and the base (5) of the steering column (4) is equipped with a box-shaped device (21), complete extended with respect to the column (19) of the steering column (4) and fixedly connected to said column (19) and rear support (22), while the box-shaped device (21) is provided with a projection (20) at the top for connection with the column (19) the steering column (4) and spring latch (30), made with the possibility of fixing the box-shaped device (21) relative to the supporting frame (8). 2. A device for moving a wheelchair along the steps of a flight of stairs according to claim 1, characterized in that the rear support (22) is fixedly connected to the two opposite walls of the box-shaped device (21). 3. A device for moving a wheelchair along the steps of a flight of a staircase according to claim 2, characterized in that the rear support (22) is installed in the openings of the opposite walls (21a, 21b) of the box-like device (21) and is fixedly connected to the said walls (21a, 21b a) by welding. 4. A device for moving a wheelchair along the steps of a flight of stairs according to claim 1, characterized in that the supporting frame (8) is made of aluminum plates and profiles. - 4 029894