SEQUENTIAL ELECTROMECHANICAL BRAKE WITH ADVANCED EMERGENCY TRIPPING

Abstract

An electromechanical brake comprising mobile induced elements or sectors or frames (2), the number of mobile induced elements (2) or sectors being at least three, where one of the sectors acts faster than the rest, and where one of the sectors acts in a delayed manner with respect to the rest of the sectors in the case of an emergency, said time-delayed actuation being achieved by means of the antiparallel arrangement of a diode (6) on the coil (5) associated with said sector. Smooth and progressive stop is thus achieved in the case of an emergency.

Claims

1.-8. (canceled).

9. A sequential electromechanical brake with advanced emergency tripping comprising at least three mobile induced elements, sectors, or frames, wherein a first of the at least three mobile induced elements, sectors, or frames acts faster than a rest of the at least three mobile induced elements, sectors, or frames, wherein in an emergency a second of the at least three mobile induced elements, sectors, or frames acts in a delayed manner with respect to a rest of the at least three mobile induced elements, sectors, or frames.

10. The sequential electromechanical brake of claim 9 wherein the delayed manner with which the second of the at least three mobile induced elements, sectors, or frames acts is due to an antiparallel arrangement of a diode on a coil associated with the second of the at least three mobile induced elements, sectors, or frames.

11. The sequential electromechanical brake of claim 9 wherein a braking torque is twice a rated torque and is equally divided between the at least three mobile induced elements, sectors, or frames.

12. The sequential electromechanical brake of claim 9 wherein the at least three mobile induced elements, sectors, or frames actuate separately, wherein an actuating sequence of the at least three mobile induced elements, sectors, or frames depends on a load that the sequential electromechanical brake is braking.

13. The sequential electromechanical brake of claim 9 wherein two or more of the at least three mobile induced elements, sectors, or frames actuate together.

14. The sequential electromechanical brake of claim 13 wherein both an actuating sequence of the at least three mobile induced elements, sectors, or frames and a grouping of the two or more of the at least three mobile induced elements, sectors, or frames that actuate together depend on a load that the sequential electromechanical brake is braking.

15. The sequential electromechanical brake of claim 9 wherein faster actuation of the first of the at least three mobile induced elements, sectors, or frames is achieved by way of at least one of a different thickness of the first of the at least three mobile induced elements, sectors, or frames; perforations in the first of the at least three mobile induced elements, sectors, or frames that allow air to pass through the perforations and reach a surface of friction faster than the rest of the at least three mobile induced elements, sectors, or frames; a brake design having a different air gap; or an increased spring pressure in the first of the at least three mobile induced elements, sectors, or frames.

16. The sequential electromechanical brake of claim 9 configured to be installed in an elevator, an escalator, or a moving walkway.

17. The sequential electromechanical brake of claim 9 wherein each of the at least three mobile induced elements, sectors, or frames is a friction device, wherein the friction devices are disposed in a common plane.

18. The sequential electromechanical brake of claim 17 wherein the friction devices together form a circular ring shape.

19. The sequential electromechanical brake of claim 18 wherein the friction devices form unequal portions of the circular ring shape.

20. The sequential electromechanical brake of claim 9 further comprising a ferromagnetic disc.

21. The sequential electromechanical brake of claim 20 wherein each of the at least three mobile induced elements, sectors, or frames is a friction device, wherein the ferromagnetic disc includes cavities that receive coils for actuating the friction devices.

22. The sequential electromechanical brake of claim 21 further comprising a diode disposed antiparallel on one of the coils that is associated with the first of the at least three mobile induced elements, sectors, or frames.

23. The sequential electromechanical brake of claim 22 wherein the diode produces a delay effect in the one of the coils operating as an electromagnet, which delay effect causes an increase in a demagnetization time of the first of the at least three mobile induced elements, sectors, or frames.

Description

DESCRIPTION OF THE DRAWINGS

[0029] To complement the description that is being made and for the purpose of aiding to better understand the features of the invention according to a preferred practical embodiment thereof, a set of drawings is attached as an integral part of said description in which the following is depicted with an illustrative and non-limiting character:

[0030] FIG. 1 shows an electromechanical brake object of the invention.

[0031] FIG. 2 shows the exploded view of the electromechanical brake where the elements forming part of the brake are shown.

[0032] FIG. 3 shows a depiction of a possible embodiment for the delayed actuation of the last sector.

PREFERRED EMBODIMENT OF THE INVENTION

[0033] A preferred embodiment of the proposed invention is described below in view of the drawings.

[0034] FIG. 1 shows that the electromechanical brake comprises a ferromagnetic disc (1), mobile induced elements or sectors or frames (2), guiding elements (3) and a brake disc (4).

[0035] FIG. 2 shows how the mobile induced elements (2) comprise three friction devices (2.1), (2.2), (2.3), this being a possible embodiment, since one of the conditions is that the friction devices are more than two in number.

[0036] In a possible preferred but non-limiting embodiment, the friction devices (2.1), (2.2) and (2.3) are contained in one and the same plane, being able to adopt a circular ring shape together, so each of the friction devices corresponds to a circular ring sector, which do not need to be the same.

[0037] Furthermore, as a result of them being arranged on one and the same plane, the final size of the electromechanical brake is clearly smaller, favoring use thereof in smaller places.

[0038] On the other hand, the so-called ferromagnetic disc (1) has a series of kidney-shaped cavities (1.1) where coils (not depicted) for actuating on the friction devices (2.1) (2.2) and (2.3) would be housed. The shape of the cavities, and accordingly of the coils, entails better use of space, i.e., magnetization capacity with respect to a conventional square- or rectangular-shaped configuration is increased, having less amount of coils. This feature is also an additional factor contributing in, among other purposes, reducing the final volume of the electromechanical brake.

[0039] The embodiment shows a first sector (2.1) having a number of perforations (2.1.1) greater than the other two sectors (2.2) and (2.3) such that it will contact the brake disc (4) first after activating the signal for movement.

[0040] Given that the braking torque of the assembly must be twice the rated torque, in a possible embodiment, and if there are three sectors or frames, the three sectors can be equally divided such that each sector provides 2/3 of the rated torque.

[0041] To achieve time-delayed actuation of a sector, which will be the so-called last sector, a possible embodiment is shown in FIG. 3, in which a diode (6) has been arranged antiparallel on the coil (5) associated with said sector in order to further allow current circulation through the coil and to thus produce a delay effect when the coil works as an electromagnet, causing an increase in demagnetization time, and accordingly, a delayed intervention of the sector with which it is associated.

[0042] Therefore, smooth and progressive stop can occur in the case of an emergency stop as a result of the sector assembly of the electromechanical brake having, in addition to a fast actuating sector, a last actuating sector actuating after the rest of the sectors.

[0043] In the elevator with an electromechanical brake such as the one described above in normal operation, i.e., without emergency stop, the diode to delay the actuation of the last sector does not act, the rest of the sectors acting simultaneously, except for the first sector, since progressive actuation is unnecessary since the car is stopped by electrical means.

[0044] Having sufficiently described the nature of the present invention as well as the manner of putting it into practice, it is hereby stated that within its essential features, it could be carried out to practice in other embodiments differing in detail from that indicated by way of example, and such embodiments would also be covered by the protection that is sought provided that the fundamental principle thereof is neither altered, changed nor modified.