RU2275892C1 - Castor wheel - Google Patents

Abstract

FIELD: medical engineering.

SUBSTANCE: device has two identical ball halves rotatable relative to a member placed between them and having supporting prop. The member is fixed on axle having its ends mounted in bearings built-in into each of the ball halves. The axle is manufactured as double-armed lever turned with its convex part or sharp bend upward. The convex part or sharp bend matches supporting prop orientation so that curvature radius or axis break in the highest point makes maximum gap (not less than corresponding member and supporting prop size) in the highest point of the wheel and makes maximum gap (allowing relative rotation of the ball halves) in the lowest point of the wheel.

EFFECT: improved wheelchair usability features.

2 cl, 1 dwg

Description

The invention relates to vehicles, in particular to the chassis of two-wheeled wheelchairs with parking supports, mainly with electric drive and servo control for the disabled, deprived of limbs or their mobility.

Closest to the invention in technical essence and the achieved result is a wheel-vehicle [1], consisting of two identical halves of the ball with the possibility of rotation relative to the element placed between them in the form of a disk, rigidly fixed to an axis, the ends of which are mounted in bearings, mounted in each of the halves of the ball.

It is inconvenient to use the wheel-vehicle [1] as a self-orientating wheel of the support of the parking chassis of a two-wheeled wheelchair, operated by a disabled person in snowy winters, long roads and the traditionally bad roads and sidewalks of today's Russia.

The purpose of the invention is to improve the ease of use by a disabled person of a two-wheeled wheelchair with parking supports.

The purpose of the invention is achieved in that in a self-orientating wheel consisting of two identical halves of the ball with the possibility of their rotation relative to the element placed between them with a support column, rigidly fixed to the axis, the ends of which are mounted in bearings mounted in each of the halves of the ball, the axis is made the form of a symmetrical two-arm lever, oriented convex or kink up, coinciding or coinciding with the orientation of the rack element; while the radius of curvature or kink of the axis at the upper point allows a maximum clearance (not less than the corresponding size of the element with the support column) at the top of the wheel and a minimum clearance (allowing relative rotation of the ball halves) at the bottom of the wheel.

A self-orientating wheel with an electric drive can be performed according to the PM type No. 19517 according to the application No. 20011111679/20 dated 05/04/2001.

The proposed technical solution of the self-orientating wheel for the chassis of a two-wheeled wheelchair with parking supports has a particular advantage both in passive maneuvering of the wheel and in maneuvering in the mode with autonomous electric drive during the movement of the carriage along natural and artificial road irregularities, in snowy winters, etc. n., thereby improving the ease of use of a wheelchair by a disabled person.

The self-orientating wheel (see drawing) consists of two identical halves 1 of the ball and is located between the element 2 and the support column 3. Element 2 is made in the form of a symmetrical spherical wedge, on the flat surfaces of which are mounted in axle 4 bearings on which (or around which) half of 1 ball can rotate. In this case, the axis of rotation of the axes 4 intersect with the kink at an angle γ at the upper point O. In the embodiment of the self-orientating wheel shown in the drawing, each of the halves 1 of the ball is mounted on the output shaft (axis 4) of the electric drive 5, mounted on the flat surface of the element 2.

Electric drives 5 are designed to provide independent rotation with reverse half 1 ball:

a) rotation in one direction - when the wheelchair is moving forward (or backward);

b) rotation in different directions - during the turns and turns of a wheelchair having parking supports with the claimed self-orientating wheel.

The source of information

1. Utility model No. 19517 by application No. 2001111679/20 of 05/04/2001.

Claims (2)

1. Self-orientating wheel, consisting of two identical halves of the ball with the possibility of rotation relative to the element placed between them with a support column, rigidly mounted on an axis, the ends of which are mounted in bearings mounted in each of the halves of the ball, characterized in that the axis is made in the form symmetrical two-armed lever, oriented convex or kink up, coinciding or coinciding with the orientation of the support pillar of the element. 2. The self-orientating wheel according to claim 1, characterized in that the radius of curvature or kink at the upper point allows a maximum clearance (not less than the corresponding size of the element with a support column) at the upper point of the wheel and a minimum clearance (allowing relative rotation of the ball halves) at the lower point wheels.