RU2688289C1 - Stroller with function of climbing stairs for people with disabilities in walking - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to transport machine building and can be used in design and manufacture of small-sized motor vehicles intended for movement of disabled people in walking both on horizontal and, in particular, inclined and stepped surfaces, including stairs. Stroller with function of lifting on stairs for people with limited abilities in walking contains two driven wheels made in the form of "star", two driving wheels with pushers, two drives of pushers, hold-down pusher assembly.

EFFECT: disclosed is a stroller with a function of climbing stairs for people with disabilities in walking.

1 cl, 8 dwg

Description

The invention relates to the transport industry and can be used in the design and manufacture of small-sized mechanical vehicles designed for the movement of people with disabilities in walking on both horizontal and, in particular, inclined and stepped surfaces, including stairs.

When reviewing the technical literature, a number of constructive solutions related to the specified problems were revealed.

Known chassis for movement on various supporting surfaces with wheel-stepper propellers, each of the wheels of which is made in the form of supports fixed to the hub, equipped with shoes and made with the possibility of changing its length to be able to move along different flights of stairs; each of the wheel-stepper thrusters consists of three pillars fixed on a common shaft symmetrically with respect to the axis of rotation of the shaft and inclined towards each other, forming lateral edges of an imaginary pyramid; the shaft is angled to the supporting surface so that the supporting surface touches no more than two supports from each wheel-stepper propulsion device simultaneously, is fixed with the possibility of transverse movements and is kinematically connected with an oscillation compensator mounted on the chassis (patent for invention RU 2626285, cl. B62D 57/02, B62D 57/032, published on August 15, 2017, Bull. No. 23)

The disadvantages of this chassis are:

the complexity of the design, due to the necessity of using the device to compensate for chassis oscillations while ensuring its smoothness when moving along horizontal and inclined surfaces;

the difficulty of moving the chassis over surfaces that do not have a hard coating (for example, on a dirt surface), caused by a high specific load from the supports on these surfaces;

the lack of devices that prevent the chassis from tipping over with the person leaning on the back of the seat back when climbing stairs due to the shift of the chassis center of gravity.

A multifunctional wheelchair is known, containing a frame with a chair, a backrest, armrests, one front wheel that performs the function of a guide, and two supporting shape-changing "wheels" capable of taking the shape of a "star", a worm gearbox, a special actuator for transferring the support wheels from “wheel” type in the “star” type (patent for invention RU 2611875, class A61G 5/00, publ. 03/01/2017, bull. No. 7).

The disadvantages of this wheelchair are:

the complexity of the design, due to the need to equip each support wheel with several (according to the number of "rays" "stars") movable elements made in the form of special metal blades with rubber coating, and the same number of special rods for opening and folding the blades when changing the shape of the wheel;

limited opportunities for the use of support wheels when moving on surfaces that do not have a hard coating (for example, on a ground surface), since the penetration of soil between the blade and the “star” beam will hamper the operation of a special actuator when converting the wheel into a star shape or prevent such a transformation;

the difficulty of controlling the movement of the wheelchair when climbing stairs, as this involves the direction of its movement forward by the back of the chair.

Closest to the claimed invention is a vehicle for persons with disabilities, containing upper and lower semi-frames, each of which is equipped with supporting wheel pairs for moving on a horizontal surface and pairs of supporting elements of a star shape to overcome the stair steps, curbs, ups and downs, the mechanism for its translation from one driving mode to another with a compensatory device, a brake to prevent arbitrary rolling down from a ladder under the action of gravity, a floor correction mechanism gears with an angular displacement relative to the steps, or when rays of the supporting elements hit the destroyed part of the steps, or when moving along steps of various heights and widths, gears located on the hubs of the driving wheels (patent for invention RU 2306127, cl. A61G 5/06, A61G 5/02, published on 20.09.2007, Bull. No. 26).

The disadvantages of this vehicle for persons with disabilities are:

large dimensions of the vehicle, making it difficult to maneuver in a confined space;

high probability of a vehicle tipping over with a person leaning on the seat back, back when climbing stairs due to a shift in the center of gravity of the stroller.

The problem solved in the invention is to eliminate these drawbacks by applying a technical solution that ensures the simplicity and reliability of the operation of the stroller with the function of climbing stairs for people with disabilities while walking, both on horizontal and inclined surfaces with hard and unpaved surfaces, and on stepped surfaces, including stairs.

The technical result of the invention is to develop the design of the stroller with the function of climbing stairs for people with disabilities in walking, realizing the possibility of its rise on stepped surfaces, including stairs.

The task is solved, and the technical result is achieved as a result of the fact that, according to the invention, the wheelchair with the function of climbing stairs for people with disabilities in walking contains a frame, a seat, two driven wheels, made in the shape of a "star" with three evenly distributed circles with “rays”, at the ends of which two support wheels are installed, two drive wheels rigidly mounted on the drive shaft, two of the plunger mounted on the inner side of each drive wheel, each of which is made n from a gear rack with sliding plates rigidly attached to its side surfaces; two drives mounted on the drive shaft on the inner side of each drive wheel, each of which is axially displaced from the neutral position to the working position and back using a clamping unit fitted rigidly a clamping cup attached to the drive with a clamping lever movably attached to it, rigidly mounted on the drive shaft a gear sleeve ensuring the transmission of torque from the drive the shaft on the drive, two radially moved limiters fixed on the support, the drive is equipped with leading and rigidly interconnected and mounted gears on the common axis, as well as a clamping collar with a clamping roller movably fixed in it, providing constant gear coupling of the executive gear with a pusher with at different angles of the pusher relative to the support surface of the stairs.

The invention is illustrated in FIG. 1-8.

FIG. 1 depicts a stroller with a function of climbing stairs for people with disabilities in walking, in the position before the start of movement on a stepped surface, side view (phase I).

FIG. 2 depicts a stroller with a function of climbing stairs for people with disabilities in walking, while it is moving on a stepped surface, side view (phase II).

FIG. 3 shows the wheel drive stroller with the function of climbing stairs for people with disabilities in walking, view from the outside on the side (phase I).

FIG. 4 depicts a wheel drive stroller with the function of climbing stairs for people with disabilities in walking, view from the outside from the side (phase II).

FIG. 5 depicts a wheel drive stroller with the function of climbing stairs for people with disabilities in walking, view from the outside from the side (phase III).

FIG. 6 shows the drive of the device for climbing the wheel of the wheel of the stroller with the function of climbing the stairs for people with disabilities in walking in a cross-section (in the neutral position).

FIG. 7 shows the drive of the device for climbing the wheel of the wheel drive stroller with the function of climbing the stairs for people with disabilities in walking in cross section (in the working position).

FIG. 8 shows the drive of the device for climbing the wheel of the wheelchair of the stroller with the function of climbing the stairs for people with disabilities in walking, view in longitudinal section.

FIG. 1-8 the following notation is used:

1 - drive wheel;

2 - driven wheel;

3 - seat;

4 - pusher;

5 - drive shaft;

6 - drive;

7 - clamping clamp;

8 - spring;

9 - pressure roller;

10 - leading gear;

11 - driven gear;

12 - executive gear;

13 - axis;

14 - plate slip;

15 - a gear rack;

16 - gear sleeve;

17 - support;

18 - pressure cup;

19 - clamping lever;

20 - plain bearing;

21 - limiter;

22 - sleeve;

23 - frame;

24 - support wheel.

Stroller with the function of climbing stairs for people with disabilities in walking works as follows.

On the drive shaft 5, at an equal distance from its ends, fix the thruster (not shown). On each side of the drive shaft 5, a clamping unit is installed so that it can be axially moved along shaft 5. At the same time, the clamping cup 18 is installed with the clamping lever 19 movably attached to it, the first bearing with respect to the propulsion unit (not shown) 20 axial movement on the shaft 5, fix on it the first half of the drive housing 6 with respect to the propeller (not shown) and rigidly attach the pressure cup 18 to it, in the first cavity of the first relative to the propulsion (not shown) floors The drive housing 6 fixes the axis 13 with the driven gear 11 and the executive 12 mounted on it, rigidly interconnected, and a pressure clamp 7 in which the pressure roller 9 is pre-installed, made with the boards at a distance from each other equal to the total width of the pusher 4 of the two sliding plates 14 and the toothed rack 15. The drive shaft 5 is mounted with the possibility of axial movement of the sleeve 22, fixedly connecting it with the first half of the drive housing 6 with respect to the drive mechanism (not shown), and the driving gear 10, fixedly connecting it with the sleeve 22. Then the gear sleeve 16 is rigidly fixed on the drive shaft, the second sliding bearing 20 with the possibility of its axial movement on the shaft 5 and the second half of the drive body 6 is fixed on it, both halves of the drive body 6 are fastened between by myself.

The drive shaft 5 is fixed on the support 17 with two limiters 21 of the radial movement of the actuator 6, which is rigidly fixed on the frame 23, previously attached to it, and the drive wheel 1 is mounted.

The pusher 4 is assembled, successively rigidly interconnecting the first sliding plate 14, the rack 15 and the second sliding plate 14. The pusher 4 is installed in the space between the executive gear 12 and the pressure roller 9, providing a constant gear connection of the executive gear 12 to the pusher 4. At the bottom the end part of the pusher 4 install the Shoe (not shown), to the pusher 4. At the height of the pusher 4, equal to about 0.5 of the radius of the drive wheel 1, attach the spring 8, the second end of which is fixed on the body Yes 6. On the frame 23 install the driven wheel 2 and seat 3.

Leading 10 and Executive 12 gears are made with the same radius, the driven gear 11 is made radius twice smaller than the radius of the pinion gear 10. The driving gear 10 is performed with internal teeth, which when the drive 6 is switched into working position engage with the gear sleeve 16. The angle of inclination of the actuator 6 together with the pusher 4 installed therein is taken from the condition in which the shoe (not shown) of the pusher 4 must be at a distance approximately equal to 0.5 of the radius of the drive wheel 1 from the conditional vertical plane passing along the axis of the drive shaft 5. To ensure the stable position of the wheelchair on the stair steps and when climbing along them, the drive wheel 1 is made with a diameter not exceeding 0.85 of the depth of the stair step. The required length of the pusher 4 is taken to be approximately 2.3 of the diameter of the drive wheel 1. The size of the driven wheel 2 and the support wheels 24 installed on it are taken from the condition that the distance between the centers of the adjacent support wheels 24 is approximately 1.10 of the ladder depth.

To ensure the movement of the stroller on a horizontal surface, the clamping lever 19 is shifted to a neutral position by means of a control panel (not shown), in which the pinion gear 10 does not engage with the gear sleeve 16, and the rotational force from the propulsion unit (not shown) is transmitted only to the leading wheels 1.

To ensure the movement of the stroller on stepped surfaces, including stairs, after the first wheel 24 of each of the driven wheels 2 touches the risers of the first step, the presser lever 19 is moved to the operating position at which each drive 6 under the influence of the pressure cup 18 on the sliding bearings 20 moves along the drive shaft 5 towards the drive wheel 1. Under the influence of the sleeve 22, the drive gear 10 engages with the gear in Street 16, and the rotational force from the propeller (not shown) begins to flow on the pinion gear 10, then - on the driven gear 11 and the actuating gear 12 attached to it, which rotates on the axis 13, through the gear rail 15 drives the pusher 4, the position which relative to the longitudinal section of the executive gear 12 is fixed using plates slip 14 and the sides of the pressure roller 9.

Under the influence of the force generated by the pusher 4, the lifting of the drive wheel 1 and the frame 23 with the seat 3 begin, and the clamping collar 7 is gradually moving radially on the axis 13.

After lifting the drive wheel 1 to the next step of the ladder, it is brought into contact with the surface of the riser of the next step of the ladder, by means of the clamping lever 19 and the clamping cup 18, the actuator 6 is moved to the side opposite to the installation location of the gear sleeve 16, the pinion gear 10 comes out of the gearing with the gear sleeve 14, the pusher 4 under the influence of the spring 8 moves to the highest position, with the result that the actuator 6 is moved to the neutral position.

With the further rise of the stroller, these processes are repeated.

Thus, as a result of the implementation of the proposed technical solution, it is possible to climb it on stepped surfaces, including stairs.

Claims (1)

Stroller with the function of climbing stairs for people with disabilities in walking, containing a frame, seat, two driven wheels, made in the shape of a "star" with three evenly distributed circumferentially "rays", at the ends of which two support wheels are installed, two rigidly mounted on the drive shaft of the drive wheel, two pusher mounted on the inner side of each drive wheel, each of which is made of a gear rack with sliding plates rigidly attached to its side surfaces, two drives, a mouth mounted on the drive shaft on the inner side of each drive wheel, each of which is adapted to axially move from the neutral position to the operating position and back using a clamping unit provided with a clamping cup rigidly attached to the drive with a clamping lever fixedly mounted on it the shaft is a gear sleeve that provides the transmission of torque from the drive shaft to the drive, two rigidly mounted on the support limiter radial movement of the drive, the drive is supplied n leading and rigidly interconnected and mounted on a common axis driven and executive gears, as well as a clamping clamp with a movably fixed pressure roller, providing a constant gear linkage of the executive gear with the pusher at different angles of the plunger relative to the support surface of the ladder.

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