WO2009072917A1

WO2009072917A1 - Bivalent mechanism for vertically stabilizing a stairlift

Info

Publication number: WO2009072917A1
Application number: PCT/RO2007/000025
Authority: WO
Inventors: Mihai Petrachioiu
Original assignee: Mihai Petrachioiu
Priority date: 2007-12-03
Filing date: 2007-12-10
Publication date: 2009-06-11

Abstract

The invention relates to a bivalent mechanism for vertically stabilizing the position of a stairlift intended for older persons or for persons having locomotive disabilities, said lift in turn having a mechanism of the type of a deformable parallelogram required for obtaining the stabilization, where three of the sides have a fixed length, the length designed according to the construction by the distance between three of the joints thereof, and one of the sides having variable length, made of an adjustable arm (25), the length thereof being adjustable. The mechanism encloses within the assembly of the parallelogram thereof, as a base element, two gears, an upper (1) and a lower (2), engaged with each other, wherein the upper (1) is fixed in a T-shape to an upper plate (3) supporting an assembly (B) of known support and guide rollers at the upper part, wherein the lower (2) is fixed to a lower plate (5) supporting an assembly (C) of known stabilizing rollers. Both gears (1, 2) are attached to a base plate (16), the upper by means of a cylindrical bushing (T) and the lower (2) by means of a screw axis (18), an axis also being supported in the interior of the cylindrical bushing (T) supporting a drive pinion on the end thereof, engaged with the gear rack mounted below the upper guide track.

Description

Bivalent mechanism for vertical stabilization of a stairlift

The present invention relates to a bivalent mechanism for vertical stabilization of the position of a stairlift intended for elderly persons or persons with locomotor dysfunctions, provided with a lift, in turn, with a mechanism of the type deformable parallelogram necessary to obtain the stabilization. By bivalent mechanism, in the present case, we mean a mechanism that, without significant changes, can perform vertical stabilization of a stairlift, whether operating on some taxiways, located on the left or right side of the staircase. More specifically, the invention relates to a bivalent mechanism of vertical stabilization of the position of a stairlift moving in two taxiways spaced apart with a certain value related to the angle of inclination of the staircase concerned and to the geometrical elements of the deformable parallelogram comprising the Identify mechanism, determined.

The description of the invention patent DE 10106187 A1, published patent application of 02.10.2001, Lift de scara, (stairlift) represents a stairlift, in which the vertical position during the movement along two taxiways, by means of a mechanism of the type deformable parallelogram performs. The angle of inclination of the stairs, including the taxiways, along with the geometric elements of the deformable parallelogram determine the distance between the two taxiways at a given moment. (See in this sense the study of the lecturer Dr. Ing. Mircea DREUCEAN and lecturer Dr. Ing. Carmen STICLARU of the University of Politehnica from Timsoara, Faculty of Mechanics, Department of Mechatronics). As follows very simple, even from the analysis of the kinematic scheme of a parallelogram mechanism which occurs in the composition of the mechanism for vertical stabilization, such devices function well up to inclinations of the taxiway, from about 60-65 Graα to the horizontal. Above this angle, some parts of the parallelogram type of mechanism bump into each other and the mechanism can no longer function. Nevertheless, these mechanisms are simple and relatively safe in operation. In some mechanisms, one of the longitudinal sides is by toothing between a toothed Teilrad or a Vollrad and a toothed cutout - neck swinging left-right about a rotation axis, which is at the same time also axle pad of the totality of the stabilizing rollers, depending on the inclination angle Both taxiways - carried out, knowing that the distance between two toothed, cylindrical wheels remains constant on the entire Vezahnungsbogen. (US 6,712,192; RO 119940; RO 121201). The gear with which the toothed cut toothed, is fixed so that it has the possibility of free rotation about the axis of the pinion, axis which in turn is toothed with the rack attached to the upper part of rolling. The wheel in question is driven in rotational motion, in one direction or the other, by a plate which supports the trolley or, in other words, by the support and guide roller group which rolls on the upper taxiway and the direction in which the lift moves ,

In order to obtain a more accurate adjustment of the position of the elevator chair, the parallelogram mechanism is provided with an arm adjustable in length - which forms the longer side of the deformable parallelogram mechanism - being made of two parts which are screwed one in the other and which one then attaches to the position with the help of an obstructing nut. The adjustable arm is attached to one of the end portions at a moving point located at the toothed cutout, the other end usually being fixed to a fixed point on the support plate of the drive motor reducer. To ensure a firm and correct movement, the toothed cutout, guided and limited, oscillates between two plates, correspondingly removed from each other, by means of some distance bushes. The position of the adjustable arm of the Parallelogrammmechanismusses, in the context of the mechanism for vertical stabilization, changes with respect to the location of the two taxiways along the stairs, so as they are located on the left or right side. At the same time, some of the parts of the rectangular mechanism or, in other words, the deformable parallelogram, namely the toothed cutout and the support plate of the engine reducer must be made "in the mirror" so that the adjustable arm of the rectangle can be placed on one or the other side, as the case may be other side of the imaginary axis is installed, which connects the axis of rotation of the toothed cutout with the axis of rotation of the drive pinion.

The disadvantage is not too big, you just have to replace the relevant parts - the toothed cutout and possibly, the mounting plate of the electric motor - if the lift concerned, for example, in operation until a given moment, on the left side For a different reason, a staircase had to work on the right side of the same staircase or staircase.

A bivalent mechanism for vertical stabilization of a stairlift is also known in which the toothed cutout is made by assembling three different parts, namely a toothed cutout segment, a block on which the segment fastens, on one or the other side, by means of a few screws , depending on the staircase side on which the lift must work, as well as a supporting element for the lower end of the adjustable arm mentioned above, arm, which, as we have already shown, one of the large sides of the deformable parallelogram represents. The support element is attached to the block on one side or the other, depending on the staircase side where the lift must be put into operation.

The proposed mechanism is still provided with a plate to which both the upper end of the adjustable arm, and the motor reducer group of the lift drive attached. Since one has symmetrically designed fasteners, allowed by the rotation of 180 degrees of the relevant plate, the positioning of the striker on one side or the other side of the axis of the drive motor, so for lifts which work on the left side or on the right side of the access staircase , Thus, when mounting a lift from the left to the right of a staircase, all you have to do is to rotate the mounting plate of the strike end from the left to the right and, in the mirror, the elements that make up the toothed cutout , change.

The technical problem solved by the invention is the execution of a bivalent mechanism for vertical stabilization of a stairlift, which allows, without any change, the installation of the same lift on each side of the staircase, without the replacement of an inner part with others, executed "in Mirror "or the change of position of a part of the composition of Mechanismusses is necessary.

The bivalent mechanism for vertical stabilization of a stairlift, according to the invention, eliminates the above-mentioned drawbacks and solves the proposed technical problem by incorporating in the composition of its parallelogram, between a pair of gears, a top and a bottom, instead of a gear and a toothed cutout which are interlocked with each other, wherein the upper is fixed to a top plate which carries at its upper end the entirety of the support and guide rollers, which is known and the other, the lower, fixed to a plate, which is the whole the stabilizer rolls, which one also knows.

For the accurate storage of the upper wheels and the drive axle of the lift, the mechanism includes a cylindrical bushing, in the interior of which two radial-axial roller bearings are mounted, which are mutually removed by a distance bushing. A drive axle is also mounted within these bushes, by means of two radial-axial roller bearings and at the end of which a drive pinion is arranged which a toothed rack arranged under the upper taxiway of the lift, in a known manner, toothed.

The upper plate, support plate, is mounted outside the cylindrical bushing, by means of the body of the upper wheel, to which, with screws, the wheel is mounted mounted on the outside of the cylinder liner. The inner wheel is supported on a screw axis fixed to a base plate and a closure plate, both in turn mounted on the outside of the cylindrical sleeve. An arm adjustable in length is also supported with its lower end to the lower end of the lower plate near the point of attachment of the set of stabilizing rollers to this plate, with its upper end provided at a fixed point on the mounting plate of the entire Mechanismusses the lift housing is mounted.

By applying the invention, the following advantages are obtained:

- the same lift is used either on the left or on the right side of the staircase, the installation of which can be carried out at the location, without any internal changes

- It is no longer possible to overturn the chair when exceeding the maximum permissible load or incorrectly placing a load on it; - It is relatively easy to carry out from the technological point of view and, of course, is much more reliable.

There is further provided an example for carrying out the invention in conjunction with Figures 1 to 5, which illustrate:

Fig. 1, general front view of a stairlift body, provided with a stabilizing mechanism, according to the invention;

- Fig. 2, axonometric view, from the front, in the direction of arrow I, a stabilizing mechanism according to the invention;

- Fig. 3, front view of a stabilization mechanism, according to the invention;

- Fig. 4, section // - II, through the front view of Fig. 3, the axes of the two gears enclosed;

- Fig. 5, section through the plane HI-III of Fig. 4, through the two gears of the Mechanismusses.

Figure 1 shows an overall view of a stairlift provided with a bivalent mechanism A for vertical stabilization of a stairlift, according to the invention. This is fixed to the metal housing of the lift by means of a fixed plate, further presented and is with a totality ß of supporting and Guide rollers and provided with a totality C of vertical stabilizing rollers.

The actual stabilizing mechanism A, according to the invention, includes, in the composition of its parallelogram, as basic elements, two gears, one at the top f, and the other at the bottom 2, interlocked with each other, the top, 1, fixed to a top plate 3, in T-shape, which carries at its upper part a set S of supporting and guiding rollers, which are known, wherein the figures 2, 3 and 4, only the two rollers 4, support rollers represent. By means of the plate 3, the roll unit 4 actually supports the entire weight of the lift, including the weight of the person carried. The other wheel, the lower, 2 is fixed to a lower plate 5, which is approximately trapezoidal, plate which carries the entirety C of the stabilizing rollers, which are known, wherein the figures 2, 3 and 4 represent only the holder 6 of the respective roles , Thus, one translates each rotation of the upper plate 1 due to the angular variation of the upper roller path, by the opposite rotation of the lower plate 5 which carries the entirety C of the stabilizing rollers. As a result, instead of a gear and a toothed cutout, two gears of the same diameter but of completely different shapes are now used, and it is known that from a technological point of view it is easier to make a toothed wheel than a toothed cut which is precision of execution of course bigger. But, through an integral redesign of this mechanism, one also considered something else.

Thus - to ensure a good gearing between the two wheels and to obtain a mechanism that works with the greatest care and certainly in very severe conditions, for example, if its load is much above the normal load, as it would be the case since he - despite the reminders - not only used for the transport of persons, but also for heavy loads; In order to ensure independent operation and operation under optimum conditions of the upper wheel and the drive pinion, the mechanism includes a cylindrical main sleeve 7 provided with flanges a at one end portion thereof, flanges within the two radial-axial rolling bearings 8, 9, respectively are stored away from each other by means of a removal sleeve 10 which is disposed between the upper rings of the two rolling bearings. A drive shaft 11, which belongs to a Motorred uktorgruppe for driving the lift, which was not shown, is also mounted within the bushing 7, by means of two radial-axial rolling bearings 8, 9 respectively. The axle 11 carries at its end a drive pinion 12, insured by an elastic ring 13, pinion which has been toothed with an unillustrated rack, arranged under the upper taxiway of the lift, in the manner already known.

To fix the upper plate 3 to the upper gear 1, the gear has the form of a bush provided with a flange b at one of its end parts, toothed flanges peripherally and radially provided with holes through which some recessed screws 14 pass, which fasten the two parts together, so the plate 3 with the wheel. 1

At the same time, the entirety of the upper support plate 3 - upper wheel 1, on the outside of the cylindrical bushing 7, mounted, by means of the part in female form of the upper gear. 1

The lower gear 2, fixed to the lower plate 5, by means of some screws 15. Thus, one translates each rotation of the upper plate 3 to the cylindrical sleeve 7 by a rotation with a different character of the lower Plate 5 which carries at its end the entirety C of stabilizing rollers. For this purpose, the lower wheel 2 are fixed together with the lower plate 5, so that they can swing freely, without friction, between a base plate 16, polygonal shape, and a closure plate 17, all of which are fixed to the position by means of a screw, Axis 18, insured with a nut, shown but not positioned, around which these swing.

The base plate 16 is mounted around the cylindrical bushing 7 by means of a roller bearing 19. The Veschlussplatte 17 is oval-shaped and is provided with one hole c and d at each end. With the hole c, the plate is mounted on the cylindrical sleeve 7, wherein the game shaft - bore is relatively small and by means of a short cylindrical sleeve 20 pressed in the hole c is set. To maintain a constant distance between the base plate 16 and the closure plate 17, the latter is provided on each of the two sides, each with a hole e, through which passes a screw 21, which the closure plate to the base plate at a certain distance, by means of a respective Removal sleeve 22 attached. The length of the distance bushing must allow the free rotation of the entirety of the lower wheel 2 - upper plate 5. Nevertheless, in order to obtain an even more accurate guidance of this whole, the lower plate 5 is mounted by means of a cylindrical bushing with flanges 23, fixed to the relevant plate by means of a few recessed screws 24th

The setting of the deformable parallelogram is obtained by a movable arm 25, adjustable in length and known so that we can not describe it any longer, arm attached with the lower end to the lower plate 5, which is movable, as previously seen. by means of a connecting piece 26 being fastened at the upper end to another fixed plate 27 by means of another connecting piece 28.

The fixed plate 27 serves to attach the stabilizing mechanism to the lift body. In this sense, it is attached to the bushing flanges 7 by means of a few screws inserted and to the lift housing by means of some screws attached to its corners. At the free end of the drive axle 11, the motor reducer group is coupled to drive the entire lift.

When placing a load on the elevator chair, subjects its weight to a bending moment, by means of the cylindrical sleeve 7 which carries the upper wheel 1, all parts stored inside and outside this socket. The axial forces followed by the decomposition of this bending moment are absorbed by a pressure roller 29 attached to a fork 30, fork disposed between the base plate 16 and the lower plate 5 and fixed to the latter by means of a centering pin 31 and a screw 32. This roller rotates with each relative movement of one of the two plates relative to the other.

Claims

Bivalent mechanism for vertical stabilization of a stairlift demands

1. Bivalent mechanism for vertical stabilization of a stairlift, executed in the form of a deformable parallelogram, three of the sides have a fixed length, length made from the constructional point of view by the distance between three of its joints, and a side of variable length, consisting of an adjustable arm ( 25) whose length one can change, characterized in that it includes in the composition of its parallelogram, as a basic element, two gears, an upper (1), and a lower one (2), which are interlocked with each other, wherein the upper (1) , fixed to an upper plate (3), in T-shape, which carries at the upper part a set (β) of supporting and guiding rollers, which are known, and the lower (2) fixed to a lower plate (5 ), which carries a set of (C) stabilizing rolls which are known, both wheels (1, 2) being fixed to a base plate (16), the upper (1) being cylindrical a bush (7) and the lower (2) by means of a screw - axis (18), and in the interior of the cylindrical bush (7) also an axis (11) is mounted, which carries at its end a drive pinion (12), which toothed with the rack fastened under the upper guide way becomes.

2. mechanism according to claim 1, characterized in that the movable arm, (25), with the lower end to the lower plate (5), by means of a connecting piece (26) and with the upper end to another, fixed plate ( 27) is fastened by means of another connecting piece (28), the plate (27) being fastened both to the cylindrical bushing (7) and to the lifting housing.

3. Mechanism according to claim 1, characterized in that between the base plate (16) and the lower plate (5) a pressure roller (29) is arranged, fixed in a fork (30), to take over the torsional moment owes the loads arranged on the lift body ,