RU2788211C1 - Wheelchair chassis - Google Patents

Abstract

FIELD: off-road vehicles.

SUBSTANCE: invention relates to off-road vehicles and can be used as a wheelchair chassis for climbing public stairs. The wheelchair chassis consists of a system of three side wheels located at the ends of one of the three radial assembly brackets rotating on the central axis, and a wheel drive mechanism. Each assembly wheel is made rimless in the form of a hub, on which a multilayer ring with a convex-concave three-wave contour is mounted.

EFFECT: simplification and unification of wheelchair chassis manufacturing technology for overcoming obstacles in the form of ditches, thresholds, curbs, scarps, including flights of stairs for general use.

2 cl, 1 dwg

Description

The invention relates to transport engineering, in particular to off-road vehicles, and can be used as the chassis of wheelchairs to overcome the last flight of stairs in general use.

Known chassis / see. Pat. USA No. 3348518 dated 10/24/1967/, consisting of two on-board pairs of propellers, each of which consists of three low-pressure pneumatic satellite rollers located at the ends of one of the three radial assembly brackets, and the sun gear of the satellite roller drive mechanism in wheel mode ; to move the chassis in wheel-walking mode, there is an additional drive.

With all the advantages of the design scheme of the known prototype chassis, which can be used as a wheelchair chassis for movement on hard surfaces (asphalt, concrete, etc.) with obstacles in the form of ditches, thresholds, curbs, scarps, including flights of stairs general use, it can be improved in order to simplify and unify the technology for manufacturing wheelchair chassis to overcome the latter obstacles in the form of ditches, thresholds, curbs, scarps, including flights of stairs for general use.

The stated goal is achieved by the fact that in the wheelchair chassis, consisting of a system of three side wheels located at the ends of one of the three radial assembly brackets rotating on the central axis, and the wheel drive mechanism, each wheel of the assembly is made rimless in the form of a hub, on which a multilayer ring with a convex-concave three-wave contour was mounted.

In this case, the multilayer ring can be made according to the ring-in-ring scheme and/or with one tape wound many times.

The technical solution proposed by the invention is illustrated in Fig. (wheelchair chassis, side view).

The wheelchair chassis proposed by the invention consists of a system of three side wheels 1 located at the ends of one of the three radial brackets 2 of the assembly, rotating on the central axis 3, and a wheel drive mechanism 1. Each wheel 1 of the assembly is made rimless in the form of a hub, on which mounted a multilayer ring with a convex-concave three-wave contour.

In this case, the multilayer ring can be made according to the ring-in-ring scheme and/or with one tape wound many times.

The best material for the manufacture of multilayer rings, according to the applicant, may be carbon fiber, given its elastic characteristics and low specific energy consumption for the production of products from it.

The best option for performing multilayer rings for the ring-in-ring scheme, according to the applicant, may be prototyping.

The drive mechanism of the three-wheel side assembly can be made, for example, by a variant of the author's patent No. 2758958 (cl. A61G 5/06) dated 01/26/2021.

The wheelchair with the proposed chassis is able to move forward - backward, repeating the movements of wheelchairs on wheeled, caterpillar and wheeled-caterpillar tracks, is able to turn - turn around on a caterpillar track without an unreasonably complicated wheel drive mechanism, thereby expanding the functionality of the wheelchair chassis when driving on hard surfaces (asphalt, concrete, etc.) with overcoming obstacles in the form of ditches, thresholds, curbs, scarps, including flights of stairs for general use.

Thus, according to the applicant, the technical solution proposed by the invention is new, has an inventive step and is industrially applicable, including as a chassis of wheelchairs for overcoming the last flights of stairs for general use.

Claims (2)

1. Chassis of a wheelchair, consisting of a system of three side wheels located at the ends of one of the three radial assembly brackets rotating on the central axis, and a wheel drive mechanism, characterized in that each assembly wheel is made rimless in the form of a hub on which it is mounted multilayer ring with a convex-concave three-wave contour. 2. The wheelchair chassis according to claim 1, characterized in that the multilayer ring can be made according to the ring-in-ring scheme and / or with one tape wound many times.

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