RU2468946C2 - Suspended staircase elevator - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: proposed elevator may be used for transfer of invalids over staircases. Elevator comprises tubular guide, carriage with top and bottom semi-rollers, and suspension with armchair. Bottom semi-rollers are engaged with drive and equipped with friction liners to interact with guides while top and bottom semi-rollers can perform angular displacement relative to each other. Tubular guide is attached by ledge with shaped slot made in guide top section. Note here that lateral surfaces of said guide can interact with flanges on top semi-rollers.

EFFECT: simplified design.

2 cl, 4 dwg

Description

The invention relates to lifting devices and can be used for lifting wheelchairs on flights of stairs.

Known stair lift containing the leading and supporting rollers moving along the guides [1].

Also known staircase elevator containing upper and lower tubular guides and four drive rollers driven from a common drive, and the rotation of the rollers is carried out by gears [2].

This scheme greatly complicates the design, increases the complexity of manufacturing and requires high maintenance costs.

Also known is a suspended stair lift, including a guide that interacts with the rollers: upper and lower. The rollers are mounted on rolling bearings in the carriage housing, the lower roller being driven from the drive [3].

The disadvantage of this device is that when passing curved sections of the track, the upper and lower rollers, having the same linear speed, travel different distances along the guide with slipping on its surfaces, which reduces the reliability of the structure and leads to an increase in drive power.

With lateral vibrations of the suspension due to inertial forces, it is possible to shift the position of the rollers relative to the guide, which also reduces the reliability and leads to an increase in drive power.

The technical result of the invention is to increase the reliability of its operation and reduce the energy consumption of the drive.

The specified technical result is achieved by the fact that the lower half-rollers are connected to the drive and are equipped with friction linings that interact with the guide, and the upper and lower half-rollers are mounted with the possibility of angular movement relative to each other, the device for fastening the tubular guide is made in the form of a protrusion with a profile groove in the upper part guide, and the side surfaces of the protrusion are arranged to interact with the flanges of the upper half-rollers.

Figure 1 shows a general diagram of a suspended stair lift, figure 2 is a section aa of figure 1, figure 3 is a kinematic diagram of the location of the upper and lower half rollers on the guide when passing a vertical turn of the route, figure 4 is a kinematic the arrangement of the upper half-rollers on the guide when passing the horizontal turn of the track (view B of figure 1).

The suspended staircase elevator consists of a permanently installed suspended tubular guide 1, in the upper part of which there is a protrusion 2 with a profile groove, a drive carriage 3 with a drive 4 mounted on it and two pairs of half-rollers - upper load-carrying 5 and lower leading 6. Friction mounted on the lower half-rollers pads 7 interacting with the tubular guide 1. The lower half rollers 6 are connected to the drive 4 and mounted on the cases of the upper half rollers 5. The half rollers 5 and 6 are mounted with the possibility of angular displacement relative to each other. The upper half rollers 5 are mounted on rolling bearings 8 in the housing 9 of the carriage 3, to which on the axes 10 an earring 11 is mounted for mounting the suspension bracket 12 of the wheelchair. Screws 13 are installed in the upper bearing supports of the half-rollers 5, which are screwed into the housing 9 of the carriage 3. The electric motor of the power unit receives power from the batteries installed on the wheelchair or included in the carriage 3.

Overhead stair lift works as follows.

To transport a wheelchair, for example, from the lower landing to the upper, the disabled person moves in a carriage to a vertical section 14 of the tubular guide 1, takes out an individual drive carriage 3 with a drive 4 and a suspension bracket 12 from a regular place of the wheelchair, connects the housing of the drive carriage to the carrier wheelchair suspension, and drive 4 with a power supply (electric motor with batteries). Then he inserts half rollers 5 and 6 of the drive carriage 3 into the cone-shaped tip 15 of the tubular guide 1 until they contact its side surfaces and turns on the electric motor from the control panel included in the drive carriage set. In this case, the half rollers 6 due to the friction forces between the friction linings 7 and the tubular guide 1 move the carriage along the vertical section 14, and then along the curved section 16 of the tubular guide until the stroller is separated from the floor of the landing. After that, the drive carriage 3 switches to a section of the tubular guide 1 parallel to the flight of stairs 1. The lower driving half rollers 6 transmit the pulling force to the load-bearing upper half rollers 5 and transport the wheelchair with a disabled person over the steps of the flight of stairs. The rolling friction between the upper load-bearing half-rollers 5 and the upper side surfaces of the guide 1 reduces the friction force, and thereby reduces the traction force on the leading lower half-rollers 6, and, therefore, reduces the power consumption of the electric motor.

When moving along curved sections of the track, the upper half rollers 5 mounted individually on the rolling bearings, and due to the possibility of rotation relative to the lower half rollers 6, move with the same angular velocity without slipping along the tubular guide 1.

When the friction linings 7 are worn by rotation of the screws 13, the upper half rollers 5 are moved together with the upper bearings of the bearings 8 downward, ensuring reliable contact of the friction linings 7 with the tubular guide 1.

With lateral vibrations of the suspension with the carriage 3 or when the carriage moves along a helical path, the flanges of the upper half rollers 5 interact with the surfaces of the protrusion 2, stabilizing the position of the carriage and half rollers.

When approaching the upper landing, the drive carriage 3 goes to the curved section 16 of the second end of the guide and lowers the wheelchair with a disabled person to the landing. Next, the drive carriage 3, moving idle along the vertical section 14 of the second end of the guide 1, is out of engagement with the guide. The disabled person removes and stacks the drive carriage 3, which carries the suspension of the wheelchair 6 to regular places in the wheelchair, and moves under its own power in the right direction. Transportation of a disabled person to the next floor or down from the top floor is carried out in the same way.

Information sources

1. Patent of Russia RU 2317936.

2. Europatent EP 0525141 B.

3. Patent OG 2431145 A.

Claims (2)

1. A suspended stair lift, including a tubular guide, a drive, a carriage with upper and lower half-rollers, the upper half-rollers mounted on the rolling bearings in the carriage housing, and the lower half-rollers mounted on the upper half-casings, characterized in that the lower half-rollers are connected to the drive and provided friction linings interacting with the guide, and the upper and lower half-rollers are installed with the possibility of angular movement relative to each other. 2. Suspended stair lift according to claim 1, characterized in that the device for attaching the tubular guide is made in the form of a protrusion with a profile groove in the upper part of the guide, and the side surfaces of the protrusion are arranged to interact with the flanges of the upper half rollers.

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