ES1170083U - Elevator traction device (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Traction device for elevators, being applicable to any type of lift of loads and/or people, such as elevators of any kind, lifts for people with reduced mobility, forklifts, mopeds and the like, it is characterized because it is constituted by the functional association of a rack and a screw that meshes longitudinally on it and associated with the corresponding drive motor, with the special feature that the rack is constituted by a toothed bar where the pitch of the endless screw is coincident with the toothing of the zipper itself; defining this a fraction of the perimetral and complementary thread of the screw. (Machine-translation by Google Translate, not legally binding)

Description

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TRACTION DEVICE FOR ELEVATORS

DESCRIPTION

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OBJECT OF THE INVENTION

The present invention relates to a traction device for elevators, whether they are cargo and / or people, based on a longitudinal, toothed, zipper-like element and an endless end with a double direction of rotation and driven by a motor, to carry out the ascent and / or descent of the elevator itself.

The object of the invention is to provide the market with an economical device, functionally reliable and also silent, being applicable to any type of elevator, whether 15 conventional elevators, inclined elevators, reduced speed elevators, elevators for people with reduced mobility, forklifts, vehicle mounts, etc.

BACKGROUND OF THE INVENTION

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There are currently different traction systems used to move the cabin of an elevator:

1. Through cables, chains or belts, a drive pulley and an electric motor. In this case 25 we have two options:

to. By winding the cables, chains or tape on the drive pulley. This system is not very efficient, so it is currently only used with low loads, low speed and low height (around 10 meters of travel).

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b. By adhesion of the cables, chains or tapes on the drive pulley. The cabin and its supporting elements are weighted. We get the movement of it thanks to the adhesion (friction) of the cables, chains or tapes with the grooves of the drive pulley. It is the most used current system since it combines low costs and energy efficiency. The

Maximum height is limited to approximately 75 meters because the weight of the cable unbalances the system and produces malfunction and excessive power increase.

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2.

Through an oleodynamic pusher. An oleodynamic drive system blows oil under pressure into a piston and it pushes the cabin, either directly, or by means of a hoist. It is a very reliable traction system and with many advantages in high load elevators and / or few stops (approximately 20 meters of maximum travel).

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With nut and screw. System used in platforms for low height (up to 2 or 3 stops). In this system we have the great advantage that the screw travel is precisely the elevator travel, which allows us to minimize the pit and the flight of the elevator. The main disadvantage is its very high cost, since the screw has a lot of technical difficulty in its preparation.

Four.

With rack and pinion. System used for industrial elevators as used for works, hydrocarbon deposits and windmills. The system is relatively cheap to manufacture but has the disadvantage of generating a lot of noise during its operation. As main advantages are its need for pit and very small escapes as in the screw-nut system, and that there is no limitation in height.

DESCRIPTION OF THE INVENTION

The traction device for elevators that is recommended can be considered as a combination of concepts between what is the screw / nut system and what is the pinion / rack system, achieving the great advantage of space and height of buildings of screw / nut system but with much lower costs and less noise.

For this and more specifically, the device of the invention is constituted by two elements functionally associated with each other, one consisting of an endless end associated with a motor and a cogwheel bar similar to a rack, although with the difference that said Toothed bar is really the fourth or fifth part of the contour of a nut, with a thread that can be normal or trapezoidal,.

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With this, greater ease is achieved in the technical realization of the rack, that is to say of the toothed bar, ultimately reducing production costs.

For its part, that rack-like bar is complemented by the aforementioned endless end that slides on it, according to a direction of double rotation and operable by a motor to carry out the lifting / lowering of the elevator.

The fact that the endless end slides on the rack means that no hitting occurs, as is the case with the rack / pinion systems, so the noise level 10 emitted is very low.

In short, it is a rack-like bar but it works like a nut, on which a screw acts with the same thread pitch and by means of the drive of the corresponding motor, so that to raise or lower the elevator

15 only the direction of rotation of the motor will have to be selected.

The advantages derived from the described device can be summarized in the following:

-It's very quiet.

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-It is very safe in its operation, since the cabin or platform of the elevator cannot move if the motor does not turn, so that the motor cannot rotate due to the weight of the cabin, even if it is more than allowed.

25 -No braking or parachute system required as traditionally occurs.

-There is no height limit

-It is much cheaper to manufacture, since the manufacturing of the zipper can be done by a simple machine where it can be achieved up to two meters long

or even more, in a fully automated way.

-Structural simplicity and easy to assemble.

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DESCRIPTION OF THE DRAWINGS

To complement the description that will then be made and in order to help

5 a better understanding of the features of the invention, according to a preferred example of practical realization thereof, is accompanied as an integral part of said description, a plan where illustrative and not limiting, the following has been represented:

Figure 1.- Shows a representation corresponding to a perspective view of a traction device for elevators, made in accordance with the object of the present invention.

15 PREFERRED EMBODIMENT OF THE INVENTION

As can be seen in the above-mentioned figure, the lifting device for elevators of the invention is constituted by the functional association of a kind of rack (1) and a screw (2), rack (1) that is constituted by a bar with a jagged (3) that

20 may be of a normal or trapezoidal tooth, and that corresponds to a quarter or a fifth of the perimeter thread of a nut.

On the teeth (3) of said bar or rack (1), a screw (2) is longitudinally engaged through which the lifting and / or lowering of the lift is carried out

25, its axis being associated with the axis of a double-turn motor, not shown in the figure, so that its drive in one direction or another causes the upward or downward displacement of the endless (2).

Obviously, the thread pitch of the teeth (3) will be the same as the thread pitch (4) of the

30 own endless (2), to allow it to slide along the zipper itself (1).

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Claims (1)

image 1 1st.-Traction device for elevators, being applicable to any type of freight elevator and / or people, such as elevators of any type, elevators for people with reduced mobility, forklifts, vehicle mounts and the like, is characterized by it constitutes by means of the functional association of a rack and a screw that gears longitudinally on it and associated with the corresponding drive motor, with the special feature that the rack is constituted by a toothed bar where the endless thread pitch is coinciding with the teeth of the rack itself; 10 defining this a fraction of the perimeter and complementary screw thread. image2