CN216272558U - Electromagnetic device for elevator brake, elevator brake and elevator system - Google Patents

Abstract

The application discloses an electromagnetic device for an elevator brake, an elevator brake and an elevator system. The electromagnetic devices are configured for providing at least two in an elevator brake, wherein each electromagnetic device comprises: a stationary member fixed relative to the elevator power plant and provided with at least one electromagnetic member for providing an electromagnetic force upon energization; a moving member disposed between the fixed member and a braking member of the elevator brake and provided to be movable relative to the fixed member; and a reset member configured to provide a reset force to the moving member in a direction opposite to the electromagnetic force; under the action of the resultant force of the electromagnetic force and the reset force, the moving part moves towards the fixed part in a driven mode to execute the releasing operation, or the moving part moves towards the braking part in a driven mode to execute the braking operation. According to the electromagnetic device, the elevator brake and the elevator system, the mandatory requirements of national standards are met, and the safety and reliability of the elevator system applying the electromagnetic device and the elevator brake are further improved.

Description

Electromagnetic device for elevator brake, elevator brake and elevator system

Technical Field

The present application relates to the field of elevator technology, and more particularly, to an electromagnetic device for an elevator brake, an elevator brake and an elevator system.

Background

Passenger conveyors are common in everyday life as a means of improving passenger walking between floors or reducing passenger walking distance. By way of example, it is particularly common to use escalators, elevators and travelators, which are commonly used between floors of commercial buildings and in large airports.

For elevator systems, there is an elevator car that typically runs in a dedicated hoistway. The elevator car performs a lifting motion along the hoistway under traction by the hoisting machine apparatus. However, in this process, if an accident occurs, a safety problem such as dropping of the elevator car may occur. Therefore, national standards in the industry dictate that elevator systems must be provided with elevator brakes. As a safety brake device in the elevator, the safety brake device plays a key role in the aspects of ensuring the safe operation of the elevator, the personal safety of passengers and the like. In practical applications, it is possible to install an elevator power plant, such as a hoisting machine, an elevator brake, etc., in a suitable location, such as an elevator machine room, and then connect the elevator power plant with the elevator car by means of ropes in order to power the latter for driving it in a lifting movement in the elevator shaft and stop the elevator car at the destination floor to which the passenger is going by operating the elevator brake. In addition, when an abnormal situation such as an equipment failure, an emergency accident, or the like occurs, the safety braking of the elevator car can be achieved by the elevator brake.

With the increasing safety requirements, in order to ensure that there are back-up measures for the brakes, the newer national standards also require that brakes driven by electromagnetic force have at least two sets of electromechanical braking devices (all the mechanical parts of the brake (including the electromagnet moving and stationary core and the parts guiding the moving core) that take part in the application of braking force to the brake wheel (disc) are installed in at least two sets, and for passenger and freight elevators the electromechanical brakes, the electromagnet coils should also be installed in two sets). In such a situation, it is desirable to improve the brake so as to satisfy the national standard, and further optimize the working performance, the system redundancy, the safety and reliability, and the like of the brake.

Disclosure of Invention

In view of the above, the present application provides an electromagnetic device for an elevator brake, an elevator brake and an elevator system, whereby one or more of the above-mentioned problems and other problems in the prior art may be solved or at least alleviated, or alternative solutions may be provided for the prior art.

To achieve at least one object of the present application, according to one aspect of the present application, there is provided an electromagnetic device for an elevator brake, wherein the electromagnetic device is configured for providing at least two in the elevator brake, wherein each electromagnetic device comprises: a stationary member fixed relative to the elevator power plant and provided with at least one electromagnetic member for providing an electromagnetic force upon energization; a moving member disposed between the fixed member and a braking member of the elevator brake and provided to be movable relative to the fixed member; and a reset member configured to provide a reset force to the moving member in a direction opposite to the electromagnetic force; under the action of the resultant force of the electromagnetic force and the reset force, the moving part moves towards the fixed part in a driven mode to execute releasing operation, or the moving part moves towards the braking part in a driven mode to execute braking operation.

In addition or alternatively to one or more of the above features, in a further embodiment, the restoring member is disposed between the fixed member and the movable member and is configured to provide a restoring force of adjustable magnitude.

In addition or alternatively to one or more of the above features, in a further embodiment, the fixing member is provided with an adjustment hole extending therethrough in an axial direction; the adjusting hole at least partially accommodates the reset piece at one side facing the moving piece and at least partially accommodates the adjusting piece at one side facing away from the moving piece; the adjusting piece can move in the adjusting hole in a controlled mode so as to push the resetting piece and adjust the length of the resetting piece extending out of the adjusting hole.

In addition to or as an alternative to one or more of the above features, in further embodiments the adjustment member is threaded with the adjustment aperture or the adjustment member and the adjustment aperture are keyed to the slider block by a sliding slot.

In addition or alternatively to one or more of the above features, in a further embodiment, the electromagnetic device further comprises an active release assembly disposed through the stationary member and coupled to the moving member; when the active release assembly is applied with external force, the resultant force of the electromagnetic force and the reset force is overcome to pull the moving part to the fixed part.

In addition or alternatively to one or more of the above features, in a further embodiment the active release assembly comprises: a pull rod which is screwed to a pull rod mounting hole which axially penetrates through the fixed member, and a first end of which is connected to the movable member; and the handle is arranged on one side of the fixed piece, which is far away from the movable piece, and is connected to the second end of the pull rod.

In addition or alternatively to one or more of the above features, in a further embodiment the fixed member has an arcuate plate-like configuration and the moving member has an arcuate plate-like configuration matching the fixed member.

In addition or alternatively to one or more of the features described above, in a further embodiment, the electromagnetic member is configured as an electromagnetic coil; the fixed part is provided with one or more ring grooves on one side facing the moving part, and the ring grooves are used for accommodating one or more electromagnetic coils.

In addition or alternatively to one or more of the above features, in a further embodiment the contour of the ring groove corresponds to the contour of the circumferential outer edge of the fixing element, or the ring groove is configured in a circular, oval, racetrack or polygonal shape.

In addition or alternatively to one or more of the above features, in a further embodiment, the electromagnetic device further includes a state detection switch for detecting whether the moving member performs a releasing operation or a braking operation, the state detection switch being provided on a circumferential outer edge of the fixed member.

In addition to or as an alternative to one or more of the above features, in a further embodiment the fixed member is fixedly connected to the elevator power unit via a connector member passing through a connector member mounting hole in the moving member.

In addition to or as an alternative to one or more of the above features, in a further embodiment a guide sleeve is provided between the connector and the connector mounting hole.

To achieve at least one of the objects of the present application, according to another aspect of the present application, there is also provided an elevator brake including: at least two electromagnetic devices for an elevator brake as described above; and a braking member disposed between the elevator power unit and the moving member.

In addition or alternatively to one or more of the above features, in a further embodiment, each of the electromagnetic devices is arranged in a plane parallel to an outer surface of the brake member adjacent to the mover and uniformly arranged along a circumferential direction of the brake member.

In addition or alternatively to one or more of the above features, in a further embodiment, when one of at least two of the electromagnetic devices is operated, the moving member is driven to move toward the fixed member to perform a releasing operation or the moving member is driven to move toward the braking member to perform a braking operation under a resultant force of the electromagnetic force and the resetting force; or when all of at least two electromagnetic devices are operated, under the action of the resultant force of the electromagnetic force and the reset force, the moving part in each electromagnetic device is driven to move towards the fixed part at the same time to execute the releasing operation, or the moving part in each electromagnetic device is driven to move towards the braking part at the same time to execute the braking operation.

To achieve at least one of the objects of the present application, according to yet another aspect of the present application, there is also provided an elevator system including an elevator brake as described above.

According to the electromagnetic device, the elevator brake and the elevator system, the at least two electromagnetic devices are matched with each other, and the fixed parts and the moving parts are installed in the electromagnetic devices in a grouping mode, so that the requirements of national standards are met, and the safety and reliability of the elevator system using the electromagnetic devices are further improved.

Drawings

The technical solutions of the present application will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that the drawings are designed for illustrative purposes only and are intended to conceptually illustrate the structural configurations described herein, and are not necessarily drawn to scale.

Fig. 1 is a schematic view from a first perspective of one embodiment of a solenoid for an elevator brake of an elevator system, wherein the solenoid is in an assembled state.

Fig. 2 is a second perspective schematic view of an embodiment of a solenoid for an elevator brake of an elevator system, wherein the solenoid is in an assembled state.

Fig. 3 is a schematic view of an embodiment of an electromagnetic device for an elevator brake of an elevator system, wherein the electromagnetic device is in an incompletely assembled state.

Fig. 4 is a schematic view of an embodiment of an arrangement of electromagnets of an electromagnetic device for an elevator brake of an elevator system.

Fig. 5 is a schematic view of another embodiment of the arrangement of the electromagnet of the electromagnetic device for the elevator brake of the elevator system.

Fig. 6 is a schematic view of yet another embodiment of an arrangement of electromagnets of an electromagnetic device for an elevator brake of an elevator system.

Fig. 7 is a schematic perspective view of one embodiment of an elevator brake assembled in an elevator system.

Fig. 8 is a plan view schematic of an embodiment of an elevator brake assembled in an elevator system.

Fig. 9 is a schematic view of an embodiment of an arrangement of electromagnetic devices of an elevator brake fitted in an elevator system.

Fig. 10 is a schematic view of another embodiment of an arrangement of electromagnetic devices fitted to an elevator brake in an elevator system.

Fig. 11 is a schematic view of yet another embodiment of an arrangement of electromagnetic devices of an elevator brake fitted in an elevator system.

Detailed Description

The present application will be described in detail below with reference to exemplary embodiments in the drawings. It should be understood, however, that the present application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the application to those skilled in the art.

Furthermore, to any single feature described or implicit in an embodiment or shown or implicit in the drawings, the present application still allows any combination or permutation to continue between the features (or their equivalents) without any technical impediment, thereby achieving more other embodiments of the present application that may not be directly mentioned herein. In addition, for the sake of brevity, general matters which have been well known to those skilled in the art, such as the basic principles regarding elevator power devices, electromagnetic forces, electromagnetic fields, etc., will not be described in detail herein.

The present application describes herein, by way of example, an electromagnetic device, an elevator brake, and their arrangement in connection with an elevator system in connection with fig. 1-11. Fig. 1 to 6 show several exemplary embodiments of an electromagnetic device. Fig. 7 to 11 show the application of the elevator brake fitted in an elevator system.

Referring to fig. 1-4 and 7-8, one embodiment of an electromagnetic device 100 for an elevator brake is shown. And such electromagnetic devices 100, when applied in an elevator brake 200, will have at least two installed. For example, the electromagnetic device 100 includes a fixed element 110, a moving element 120, a reset element 130, and an electromagnetic element 140. Wherein the fixture 110 can be fixed relative to the elevator power plant 300, for example, the fixture 110 can be directly attachedly connected to a base 330 of the elevator power plant 300 (e.g., a traction machine, etc.), such as a housing, an internal frame, or any other suitable structure thereof, optionally via one or more attachment members 180, such as bolts, so that the fixture 110 can remain stationary relative to the base 330.

The stationary member 110 may be constructed in any feasible shape structure according to different applications, and one or more electromagnetic members 140 may be provided thereon, so as to provide an electromagnetic force, which will be applied to the moving member 120, by forming an electromagnetic field after supplying power to the electromagnetic members 140, if necessary, as will be described later.

With continued reference to fig. 1 to 4 and 7 to 8, in the illustrated electromagnetic device 100, the moving member 120 is disposed between the fixed member 110 and a braking member 210 mounted on a driving shaft of the elevator brake 200, which is capable of moving relative to the fixed member 110. There are a plurality of power sources capable of driving the moving member 120, and for example, in addition to the electromagnetic member 140, the reset member 130 may be included, which is provided to provide a reset force to the moving member 120 in a direction opposite to the direction of the electromagnetic force. At this time, the moving member 120 may be drivingly moved toward the fixed member 110 to perform a releasing operation or the moving member 120 may be drivingly moved toward the braking member 210 to perform a braking operation, under the resultant force of the electromagnetic force provided by the electromagnetic member 140 and the resetting force provided by the resetting member 130.

It should be noted that, the term "resultant force" refers to the magnitude and direction of the resultant force obtained by vector-estimating the two opposite forces, and when the force drives the moving element 120 to move towards the fixed element 110, it is characterized in that the electromagnetic device 100 is performing the releasing operation; when the force drives the moving member 120 toward the braking member 210, it is characterized that the electromagnetic device 100 is performing a braking operation. In this process, it is not required that both the reset force and the electromagnetic force for forming the resultant force must exist, and especially for the electromagnetic force, the resultant force may also assume a state of 0, that is, the reset force itself is the resultant force of the two, which can also urge the moving element 120 to move toward the direction in which the reset force is applied. Accordingly, embodiments of these forces fall within the scope of the "resultant forces" described herein, as long as they do not prevent the achievement of the objectives of the present invention.

Under the arrangement, according to the electromagnetic device, at least two electromagnetic devices are matched with each other, and the fixing piece, the moving piece, the resetting piece and the electromagnetic piece are arranged in each electromagnetic device in a grouping mode, so that the electromagnetic device meets the mandatory requirements of national standards, and the safety and reliability of an elevator system using the electromagnetic device are further improved.

The construction of the various components of the electromagnetic device and their connections will be described further below. In addition, for further improvement of reliability, practicability, economy or other aspects, additional parts may be added, as also exemplified below.

For example, as an example of the restoring member 130, it may be disposed between the fixed member 110 and the movable member 120 and configured to provide a restoring force with an adjustable magnitude. At this time, it can be adapted to different magnitudes of electromagnetic force provided by the electromagnetic element by adjustment; alternatively, it may be adjusted to resume providing a stable reset force when the reset force decays as the component ages.

Specifically, referring to fig. 1 to 4, in order to realize such an arrangement, an adjusting hole 111 may be formed in the fixing member 110 to penetrate in the axial direction. The reset member 130 is partially fitted into the adjustment hole 111 from a side of the fixed member 110 toward the moving member 120. In addition, an adjusting member 150 is additionally provided to be fitted into the adjusting hole 111 from the side of the fixed member 110 facing away from the movable member 120 so that it can abut against the reset member. At this time, since the adjusting member 150 can move in the adjusting hole 111 in a controlled manner and is fixed when being installed in the adjusting hole 111 at different depths, accordingly, the end position of the resetting member 130 abutting against the adjusting member will be kept at different depths in the adjusting hole 111, that is, the resetting member 130 has different lengths extending out of the adjusting hole 111, so as to provide resetting forces of different magnitudes. For example, when the restoring member 130 is a spring, the compressed length thereof can represent the elastic restoring force provided by the restoring member.

As can be seen from the above description, the installation manner between the adjusting member 150 and the adjusting hole 111 should be able to achieve the functions of adjusting the length and keeping the fixing at the same time. As several application examples, the adjusting member 150 and the adjusting hole 111 may be screwed, that is, the adjusting member may be adjusted by different screwing depths. Alternatively, the adjusting element 150 and the adjusting hole 111 are connected by a sliding groove and a sliding block key, that is, the sliding block key arranged on the adjusting element 150 or the adjusting hole 111 is matched with the sliding groove with different depth on the other, thereby realizing the adjustment of the reset element.

Further, continuing with fig. 1-4, to facilitate maintenance and servicing of electromagnetic apparatus 100, an active release assembly 160 may also be provided that is disposed through stationary member 110 and coupled to moving member 120. In this arrangement, the active releasing assembly 160 can be manually or externally connected with a mechanical tool to apply a force to overcome the resultant force of the electromagnetic force and the reset force, so as to pull the moving element 120 toward the fixed element 110. As a specific implementation, the active release assembly 160 includes a pull rod 161 and a handle 162. Wherein the tie rod is threadedly mounted to a tie rod mounting hole 112 axially penetrating the fixing member 110, thereby allowing it to move and remain fixed relative to the fixing member 110. The first end of the pull rod is connected to the movable member, and the second end of the pull rod is connected to a handle 162 disposed on a side of the fixed member 110 away from the movable member, so that the maintenance process can be actively performed by screwing the handle 162, and whether each component is aged or working normally is confirmed by the operation of the process, thereby determining the next maintenance measure.

For another example, in order to meet the requirement of installing two sets of electromagnetic devices 100 in the national standard and simultaneously reduce the structural modification of the existing elevator brake 200 as much as possible, it may be considered that the fixing member 110 and the moving member 120 matched therewith are both configured to have an arcuate plate-shaped structure (e.g., a semicircular shape), and as long as the fixing member and the moving member are designed to have the same radius as that of the previous circular integrated fixing member, the fixing member and the moving member may be completely suitable for the installation space of the previous circular integrated fixing member and moving member, and the equipment may be modified less, and corresponding parts in the existing elevator system may also be directly replaced for application, thus having a wider application range.

It should be understood that the term "arcuate" is used herein to describe a geometric arc, i.e., a shape formed by a chord (straight line segment) and an arc (arc segment) corresponding thereto.

As still another example, as shown in fig. 1, the electromagnetic device 100 further includes a state detection switch 170 (which may be a microswitch, for example) for detecting whether the moving member 120 has performed a releasing operation or a braking operation, and the state detection switch 170 is provided on a circumferential outer edge of the fixed member 110. At this time, in order to facilitate the installation of the state detection switch 170, a corresponding installation plane may be further cut on the fixing member 110 configured in an arcuate plate-shaped structure. Compared with the original design mode of axially arranging the state detection switch on the back of the fixing piece, the state detection switch arranged in the mode can effectively save the axial design space of the brake static plate assembly.

In addition, in order to connect the fixed member 110 to the elevator power unit 300, a connector mounting hole is formed on the moving member 120 having a matching profile, and the connector 180 is fixedly connected to the elevator power unit after passing through the connector mounting hole of the moving member 120. Further, a guide sleeve 190 can be arranged between the connecting piece 180 and the connecting piece mounting hole to improve the stability of relative movement between the two.

On the other hand, the connection mode between the connector 180 and the fixing member 110 may be an integrated structure, or the fixing member 110 may be further provided with a connector mounting hole, so that the connector 180 sequentially passes through the connector mounting holes of the two to realize the fixed connection with the elevator power unit.

The arrangement, number, size, type, material used, etc. of the above-mentioned connecting elements 180, guide sleeves 190, etc. allow for flexible selection and adjustment according to different application requirements, for example, in some embodiments, several identical connecting elements 180 may be used at the same time, and in other embodiments, several connecting elements 180 different from each other may be used in combination, which is also shown in the different figures of the present application as an example.

Referring next to fig. 4-6, the electromagnetic member 140 may be configured as a common electromagnetic coil, and in practical applications, the electromagnetic coil may be directly wound on the fixing member 110, or a prefabricated electromagnetic coil may be mounted on the fixing member 110, and the electromagnetic coils may be arranged symmetrically or asymmetrically with respect to each other on the fixing member 110. Of course, the present application also allows the electromagnetic member 140 to adopt any other form of electromagnetic component, module or device capable of outputting electromagnetic force after being electrified.

In connection with the illustrated embodiment, one or more annular grooves 113 may be provided on the side of the stationary member 110 facing the moving member 120 for receiving the electromagnetic coils. The arrangement of the electromagnetic coil in the annular groove of the fixing member can be arranged in various structural forms, and the main consideration in the design process is as follows: the maximum magnetic flux is achieved by using the minimum winding amount; and the structure can be matched with the structure of the fixing piece, and does not interfere with other parts on the fixing piece. In view of the foregoing, the ring grooves and the electromagnetic coils 140a disposed therein may be configured in two circles (as shown in fig. 4) connected in series with each other or in an elliptical or racetrack shape or polygonal shape, not shown. Or the contour of the ring groove is set to correspond to the contour of the circumferential outer edge of the fixing member 110 (as shown in fig. 5), and the electromagnetic coil 140b is accordingly disposed therein. On the basis of this, the ring groove is subdivided into a plurality of segments, each of which corresponds to the contour of the circumferential outer edge of the fixing element 110 (as shown in fig. 6), and the electromagnetic coil 140c is arranged therein accordingly.

It will be appreciated that since the electromagnetic device according to the present application may be formed as a modular, self-contained unit, it can be manufactured, used, sold, etc. separately. The elevator car is compact in structure, convenient to manufacture, transport, install and maintain and low in overall cost, and therefore the elevator car is very suitable for popularization and application in the field of elevators. For example, once a failure of a particular solenoid in the elevator brake is detected during use, it is possible to replace the partially failed solenoid with a new solenoid very easily, quickly and inexpensively, so that the entire fixing, moving and/or solenoid in the elevator brake no longer needs to be replaced as in the prior art.

One embodiment of an elevator brake is also described herein in connection with fig. 7-11. The elevator brake 200 includes the electromagnetic device 100 of any of the foregoing embodiments or combinations thereof, and thus has various effects, which are not described herein again. The mating relationship of the other components of the elevator brake 200 with the electromagnetic device 100 will be described in greater detail below. Specifically, the brake 200 generally further includes a braking member 210, the braking member 210 being disposed between the elevator power unit 300 and the moving member 120, and may be mounted (e.g., by splines) on a drive shaft 310 of the elevator power unit 300. Brake pads (not shown) may also be provided on both sides of the brake 210, which are in rotational motion consistent and associated with the drive shaft 310. The brake lining disk has a floating space in the axial direction. When the moving member 120 is pushed to press against the brake lining disc on one side of the braking member 210 and the braking member 210 itself to perform a braking operation, the braking member 210 is displaced in the axial direction, and the brake lining disc on the other side of the braking member 210 is pushed to press against the base 330, thereby forming an effect that the brake lining discs on both sides of the braking member 210 are stressed. On the contrary, when the force application is stopped or the force application is reversed, the brake member 210 and the brake lining discs on both sides thereof are not pressed any more, thereby performing the releasing operation.

In application, as shown in fig. 9 to 11, a plurality of electromagnetic devices 100 can be simultaneously arranged in a parallel manner in a plane parallel to the outer surface of the braking member 210 facing the moving member 120, and the electromagnetic devices 100 can be uniformly arranged along the circumferential direction of the braking member 210, which is beneficial to providing an overall uniform electromagnetic force, and promoting more stable and reliable working performance of the elevator brake.

For example, referring to fig. 9, there are two electromagnetic devices 100, which are spliced together to form a substantially circular shape, so that a perfect replacement of the past integrated circular electromagnetic devices can be achieved. At this time, it should be noted that, considering the existence of the driving shaft 310 of the motor, the electromagnetic device 100 should be provided with the corresponding shaft mounting hole 114 to form an escape space. At this time, when one electromagnetic device 100 is operated, under the resultant force of the electromagnetic force and the reset force, the moving element 120 may be driven to move toward the fixed element 110 to perform the releasing operation, or the moving element 120 may be driven to move toward the braking element 210 to perform the braking operation, while the other electromagnetic device 100 may be present as a backup device, which satisfies the requirements of safety and reliability. Alternatively, when both the electromagnetic devices 100 are operated, the moving member 120 in each electromagnetic device 100 is simultaneously driven to move toward the fixed member 110 to perform the releasing operation or the moving member 120 in each electromagnetic device 100 is simultaneously driven to move toward the braking member 210 to perform the braking operation under the resultant force of the electromagnetic force and the restoring force, thereby providing a greater electromagnetic force and braking force.

With continued reference to fig. 10, there are three electromagnetic devices 100 connected end-to-end to form a generally petaloid structure, and the gap existing therein can be directly used as an escape space for the drive shaft 310 of the motor. Meanwhile, due to the existence of more electromagnetic devices 100, larger electromagnetic force and braking force can be provided in a cooperation state, and the electromagnetic devices can be mutually standby in an independent working state to form more security.

Similarly, referring to fig. 11, there are four electromagnetic devices 100, connected end to end, generally forming a petaloid structure, while the gap present therein can be used directly as an escape space for the drive shaft 310 of the motor. Meanwhile, due to the existence of more electromagnetic devices 100, larger electromagnetic force and braking force can be provided in a cooperation state, and the electromagnetic devices can be mutually standby in an independent working state to form another guarantee.

Further, an embodiment of an elevator system is described herein with continued reference to fig. 7-8. The elevator system comprises the brake in any of the above embodiments or combinations thereof, so that various effects brought by the brake can be achieved, and the description is omitted.

The construction and connection in which the various components are modified to accommodate the brake will be described below in connection with an elevator system and brake. In addition, for further improvement of reliability, practicability, economy or other aspects, additional parts may be added, as also exemplified below.

For example, the elevator power plant 300 of the elevator system comprises a motor for powering the elevator, a base 330 for mounting the motor, and a drive shaft 310 pivoted to the base 330 for transmission. The brake member 210 (e.g., a brake lining disk) is fitted on the driving shaft 310 from one side and rotates therewith.

Specifically, under control of the elevator system, when the electromagnetic device 100 is energized, the coil located in the ring groove 113 of the fixed member 110 is energized, which attracts the moving member 120 (e.g., armature) against the reset force provided by the reset member 130 and toward the fixed member 110; at this time, if the elevator power unit 300 is in motion all the time, the braking member 210 coupled (e.g., splined) to the driving shaft 310 is still not subjected to the braking pressure, and can rotate as the driving shaft 310 rotates. If the elevator power plant 300 has been braked before, when the moving part 120 of the elevator brake is released and no longer presses the braking part 210, the braking part 210 and the drive shaft 310 associated therewith resume rotation and the elevator is released from braking.

Furthermore, when the electromagnetic device 100 is powered off, the coil in the ring groove 113 of the stationary member 110 is powered off, and it no longer attracts the moving member 120, and thus the restoring member 130 is no longer obstructed, and its applied restoring force will urge the moving member 120 to move toward the braking member 210 on the side of the elevator power device 300 until the braking member 210 is pressed; at this time, the braking member 210 coupled to the driving shaft 310 is subjected to the braking pressure, and thus the driving shaft 310 can be braked, so that the elevator is braked, thereby preventing a safety hazard.

The above examples mainly illustrate the electromagnetic device for an elevator brake, the elevator brake and the elevator system of the present application. Although only a few embodiments of the present application have been described, those skilled in the art will appreciate that the present application may be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present application as defined in the appended claims.

Claims (16)

1. An electromagnetic device for an elevator brake, characterized in that the electromagnetic device is configured for providing at least two in an elevator brake, wherein each electromagnetic device comprises:

a stationary member fixed relative to the elevator power plant and provided with at least one electromagnetic member for providing an electromagnetic force upon energization;

a moving member disposed between the fixed member and a braking member of the elevator brake and provided to be movable relative to the fixed member; and

a reset member configured to provide a reset force to the moving member in a direction opposite to the electromagnetic force;

under the action of the resultant force of the electromagnetic force and the reset force, the moving part moves towards the fixed part in a driven mode to execute releasing operation, or the moving part moves towards the braking part in a driven mode to execute braking operation.

2. The electromagnetic device for an elevator brake of claim 1, wherein the reset element is disposed between the fixed element and the moving element and is configured to provide a reset force of adjustable magnitude.

3. The electromagnetic device for the elevator brake according to claim 2, wherein an adjustment hole is formed in the fixing member so as to extend therethrough in the axial direction; the adjusting hole at least partially accommodates the reset piece at one side facing the moving piece and at least partially accommodates the adjusting piece at one side facing away from the moving piece; the adjusting piece can move in the adjusting hole in a controlled mode so as to push the resetting piece and adjust the length of the resetting piece extending out of the adjusting hole.

4. The electromagnetic device for an elevator brake of claim 3, wherein the adjustment member is threaded with the adjustment hole or the adjustment member and the adjustment hole are keyed with a slider through a sliding slot.

5. The electromagnetic device for an elevator brake of claim 1, wherein the electromagnetic device further comprises an active release assembly disposed through the fixed member and connected to the moving member; when the active release assembly is applied with external force, the resultant force of the electromagnetic force and the reset force is overcome to pull the moving part to the fixed part.

6. The electromagnetic device for an elevator brake of claim 5, wherein the active release assembly comprises: a pull rod which is screwed to a pull rod mounting hole which axially penetrates through the fixed member, and a first end of which is connected to the movable member; and the handle is arranged on one side of the fixed piece, which is far away from the movable piece, and is connected to the second end of the pull rod.

7. The electromagnetic device for an elevator brake of claim 1, wherein the fixed member has an arcuate plate-like structure and the moving member has an arcuate plate-like structure that mates with the fixed member.

8. The electromagnetic device for an elevator brake of claim 7, wherein the electromagnetic member is configured as an electromagnetic coil; the fixed part is provided with one or more ring grooves on one side facing the moving part, and the ring grooves are used for accommodating one or more electromagnetic coils.

9. The electromagnetic device for an elevator brake of claim 7, wherein the contour of the ring groove corresponds to the contour of the circumferential outer edge of the fixing piece, or the ring groove is configured in a circle, an ellipse, a racetrack, or a polygon.

10. The electromagnetic device for an elevator brake according to claim 1, wherein the electromagnetic device further includes a state detection switch for detecting whether the moving member performs a releasing operation or a braking operation, the state detection switch being provided on a circumferential outer edge of the fixed member.

11. The electromagnetic device for an elevator brake of claim 1, wherein the fixed member is fixedly connected to the base of the elevator power unit via a connector passing through a connector mounting hole of the moving member.

12. The electromagnetic apparatus for an elevator brake of claim 11, wherein a guide bushing is disposed between the connector and the connector mounting hole.

13. An elevator brake, comprising: at least two electromagnetic devices for an elevator brake according to any of claims 1-12; and a braking member disposed between the elevator power unit and the moving member.

14. The elevator brake of claim 13, wherein each of the electromagnetic devices is disposed in a plane parallel to an outer surface of the braking member adjacent to the mover and uniformly disposed along a circumferential direction of the braking member.

15. The elevator brake of claim 13 wherein,

when one of at least two electromagnetic devices works, under the action of the resultant force of the electromagnetic force and the reset force, the moving part is driven to move towards the fixed part to execute a releasing operation, or the moving part is driven to move towards the braking part to execute a braking operation; or

When all of at least two electromagnetic devices are operated, under the action of the resultant force of the electromagnetic force and the reset force, the moving part in each electromagnetic device is driven to move towards the fixed part at the same time to execute a releasing operation, or the moving part in each electromagnetic device is driven to move towards the braking part at the same time to execute a braking operation.

16. Elevator system, characterized in that the elevator system comprises an elevator brake according to any of claims 13-15.

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