Machine and support assembly for elevators

Abstract

 The invention relates to an operation device for elevators, comprising a motor - ratiomotor assembly (1), provided with an output shaft (2) projecting from both sides of the engine, pulley means (3) and support means (4), symmetrically placed on said output shaft (2), upper support means (7), to which said support means (4) are coupled, and having at least a fixing point (8) for said motor - ratiomotor assembly (1), said device being fixed above to the self-bearing structure comprised of the guides of the elevator car and by the counterweight.

Description

[0001] The present invention relates to an improved operation device for elevators.

[0002] More specifically, the invention concerns a device of the above kind for the electrical operation of an elevator.

[0003] The invention described in the following is directed to electrical operation elevators.

[0004] As it is well known, known electrical operation elevators use motors or winch - motor assembly, suitably realised for the elevators.

[0005] More specifically, they are studied since they must support heavy radial loads due to the ropes and to the car - counterweight assembly.

[0006] In view of the above, the Applicant has realised a device allowing to use an industrial kind ratiomotor, not exploiting the casing of the machine as second support element of the slow shaft of the traction pulley, but a real support, in such a way that the ratiomotor only has to transmit the torque.

[0007] Another peculiar feature of the device according to the present invention is that of providing a solution that allows to fraction the rope loading on two pulleys symmetrically laterally placed with respect to the ratiomotor.

[0008] By this kind of technical choice, it is possible to reduce the dimensions of the shaft and consequently those of the ratiomotor, thus making it possible to position the same ratiomotor within the room, without penalising the dimension of the same with respect to a traditional system.

[0009] In this way, reduced dimensions of the machinery are obtained, the latter being a basic requirement that must be born in mind to avoid that the advantage obtained freeing the required spaces for the machine room are frustrated by the need of larger dimensions for the stroke room.

[0010] It is therefore specific object of the present invention an operation device for elevators, comprising a motor - ratiomotor assembly, provided with an output shaft projecting from both sides of the engine, pulley means and support means, symmetrically placed on said output shaft, upper support means, to which said support means are coupled, and having at least a fixing point for said motor - ratiomotor assembly, said device being fixed above to the self-bearing structure comprised of the guides of the elevator car and by the counterweight.

[0011] Preferably, according to the invention, said upper support means are comprised of a structure resting on the guides.

[0012] Furthermore, according to the invention, it is provided the fixing of the motor - ratiomotor group, in order to prevent the rotation.

[0013] Always according to the invention, said support means are comprised of plates.

[0014] Still according to the invention, said motor - ratiomotor assembly is an industrial kind assembly.

[0015] The present invention will be now described, for illustrative but not limitative purposes, according to its preferred embodiments, with particular reference to the figures of the enclosed drawings, wherein:

figure 1 schematically shows an elevator provided with a device according to the invention;

figure 2 is a perspective view of a device according to the invention; and

figure 3is a lateral view of the device of figure 2.

[0016] Observing the figures of the enclosed drawings, the device according to the invention provides a motor - ratiomotor assembly 1 of the industrial kind, having a shaft, projecting from both sides.

[0017] Pulleys 3 and two supports 4 are symmetrically inserted on said shaft 2.

[0018] Said supports 4 are fixed by the plates 5, 6 to an upper cross member 7.

[0019] Said upper cross member 7 centrally provides a fixing point 8, to which the assembly 1 of the device according to the invention is coupled in order to prevent its rotation.

[0020] All the assembly 1, along with the relevant support frame 7, is fixed at the top of the self-bearing structure comprised of the car 10 guides 9 and of the counterweight.

[0021] By the device according to the invention, it is possible a ratiomotor of the industrial kind, not exploiting the casing of the machinery as second support element of the slow shaft of the traction pulley, but a real support, in such a way that the ratiomotor must only transmit the torque.

[0022] Another basic feature of the device according to the invention is that of fraction the rope loads on the two pulleys 3, that are symmetrically laterally placed on the ratiomotor 1.

[0023] The fractioning allows reducing the dimensions of the shaft 2, and consequently those of the ratiomotor 1, thus making it possible its positioning within the room without penalising the dimensions of the same with respect to a traditional system.

[0024] The present invention has been described for illustrative but not limitative purposes, according to its preferred embodiments, but it is to be understood that modifications and/or changes can be introduced by those skilled in the art without departing from the relevant scope as defined in the enclosed claims.

Claims

1. Operation device for elevators, characterised in that it comprises a motor - ratiomotor assembly, provided with an output shaft projecting from both sides of the engine, pulley means and support means, symmetrically placed on said output shaft, upper support means, to which said support means are coupled, and having at least a fixing point for said motor - ratiomotor assembly, said device being fixed above to the self-bearing structure comprised of the guides of the elevator car and by the counterweight.

2. Operation device for elevators according to claim 1, characterised in that said upper support means are comprised of a structure resting on the guides.

3. Operation device for elevators according to claim 1 or 2, characterised in that it is provided the fixing of the motor - ratiomotor group, in order to prevent the rotation.

4. Operation device for elevators according to one of the preceding claims, characterised in that said support means are comprised of plates.

5. Operation device for elevators according to one of the preceding claims, characterised in that said motor - ratiomotor assembly is an industrial kind assembly.

6. Operation device for elevators according to each one of the preceding claims, substantially as illustrated and described.

Drawing