RU2623957C1 - Wheelchair - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: in wheelchair including a supporting frame, on which are mounted a chair, batteries, side drive wheels, pairs of side belt pulleys covered by a belt, a mechanism for orienting and fixing the chair in relation to the supporting frame, the drive wheel is made without a hub in the form of a rim with a pneumatic tire, the side parts of the supporting frame, interconnected by the mechanism of orientation and fixation of the chair, are made in the form of two triangular frames adjacent to the pneumatic tire, connected by three pairs of shafts, on the inner ones of which roller bearings for the rim are mounted, and on the outer ones of which friction rollers in the form of single-sheeted hyperboloids for the pneumatic tire are mounted, toothed belt pulleys covered by a belt with double moulded teeth are additionally mounted on the lower outer shafts at least on one side of the pneumatic tire, the chair orientation mechanism is made according to the scheme of a four-hinged anti-parallellogram supporting the chair with its upper part.

EFFECT: simplifying the design and reducing the cost of a wheelchair allowing to overpass stair flights of common use.

2 cl, 2 dwg

Description

The invention relates to a means of transportation - wheelchairs, providing the ability to overcome public flights of stairs.

Known / cm. WO 2008/041043 dated 04/10/2008 / a wheelchair including a support frame on which a seat is mounted, batteries, inboard drive wheels, a pair of inboard belt pulleys covered by a belt, an orientation and fixing mechanism of the seat in relation to the support frame, and containing other devices and mechanisms.

The well-known wheelchair is excessively multicomponent, structurally complicated and, as a result, can be too expensive for a wheelchair user of the Russian Federation.

In order to eliminate the noted drawbacks in a wheelchair, including a supporting frame, on which a seat is mounted, batteries, on-board drive wheels, a pair of on-board belt pulleys covered by a belt, the mechanism of orientation and fixing of the chair in relation to the supporting frame, the drive wheel is made stepless in in the form of a rim with a pneumatic tire, the side parts of the supporting frame, interconnected by the mechanism of orientation and fixation of the chair, are made in the form of two triangular frames adjacent to the pneumatic tire, connected by three pairs in Alloys, on the inner of which roller bearings are mounted under the rim, on the outer ones of which friction rollers are mounted in the form of single-cavity hyperboloids for a pneumatic tire, toothed belt pulleys covered by a double belt are additionally mounted on at least one side of the pneumatic tire molded tooth, the mechanism of orientation of the chair is made according to the scheme of the four-hinged antiparallelogram carrying the upper part of the chair.

At the same time, at least one of the two lower friction rollers and one of the two belt pulleys of each on-board drive wheel-pneumatic tires are equipped with an electric drive.

The technical solution proposed by the invention is illustrated in FIG. 1, 2. In FIG. 1 shows the proposed wheelchair (general side view). In FIG. 2 simplifies the mechanism of orientation of the chair, made according to the scheme of the four-hinged antiparallelogram carrying the upper part of the chair (side view):

a) for movement on a horizontal plane;

b) with an overturned chair back to move up the stairs;

c) with an overturned chair forward to move, for example, through the curb.

The wheelchair according to the invention includes a supporting frame on which a chair is mounted, batteries, on-board drive wheels, a pair of on-board belt pulleys covered by a belt, an orientation and fixing mechanism for the chair in relation to the supporting frame. In this case, the drive wheel is made endless in the form of a rim with a pneumatic tire 1, the side parts of the bearing frame, interconnected by the mechanism of orientation and fixation of the chair, are made in the form of two triangular frames 2 adjacent to the pneumatic tire 1, connected by three pairs of shafts, on the inner of which roller supports 3 under the rim, on the external of which friction rollers 4 are mounted in the form of single-cavity hyperboloids for the pneumatic tire 1, on the lower external shafts are additionally mounted at least on one side of the pneumatic tire 1 toothed belt pulleys 5, covered by a belt with a double molded tooth 6, the chair orientation mechanism (see FIG. 2) is made according to the scheme of the four-joint ABCD antiparallelogram carrying the upper part of the sun chair (not shown).

At the same time, at least one of the two lower friction rollers 4 and one of the two belt pulleys 5 of each side drive wheel-pneumatic tires 1 are equipped with an electric drive (not shown).

The design of the wheelchair proposed by the invention is simpler than the prototype wheelchair. The chair’s orientation mechanism, made according to the scheme of the four-joint ABCD antiparallelogram, which carries the upper part of the aircraft, which orientes and fixes (the locking mechanism is not shown) the chair with respect to the pairs of side belt pulleys 5 covered by belts 6, and not vice versa, simplifies the design of the wheelchair, reduces the cost of the latter.

Climbing the public flight of stairs on the proposed wheelchair is planned with the back up (in the direction of travel - ascent), the descent - face down - in the direction of travel, as safer options for overcoming flights of stairs.

Thus, according to the applicant, the invention is new, has an inventive step and is industrially applicable.

Claims (2)

1. Wheelchair, including a bearing frame on which a chair is mounted, batteries, on-board drive wheels, a pair of on-board belt pulleys covered by a belt, a mechanism for orienting and fixing the chair in relation to the carrier frame, characterized in that the drive wheel is made stepless in in the form of a rim with a pneumatic tire, the side parts of the supporting frame, interconnected by the mechanism of orientation and fixation of the chair, are made in the form of two triangular frames adjacent to the pneumatic tire, connected by three pairs of shafts, on the inner and of which the roller bearings are mounted under the rim, on the external of which friction rollers are mounted in the form of single-cavity hyperboloids for the pneumatic tire, toothed belt pulleys covered by a belt with a double molded tooth are additionally mounted on at least one side of the pneumatic tire, an orientation mechanism armchairs made according to the scheme of the four-joint antiparallelogram carrying the upper part of the armchair. 2. Wheelchair according to claim 1, characterized in that at least one of the two lower friction rollers and one of the two belt pulleys of each side drive wheel-pneumatic tires are equipped with an electric drive.

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