Wear monitoring system, motor and elevator

Abstract

Disclosed is a wear monitoring system for a brake device of a motor, the brake device comprising a brake disc and a brake magnet, the brake magnet being movable relative to the brake disc to switch between an engaged state and a disengaged state; wherein the wear monitoring system comprises: a fixedly arranged support; a first arm portion comprising a first free end and arranged to be coupled to the brake magnet such that the first free end is always in contact with a bottom of the brake magnet; a second arm portion arranged to be coupled to the first arm portion and comprising a second free end; and a triggering device comprising a triggering button arranged to be triggered by the second free end of the second arm portion when the brake magnet and the brake disc are in the engaged state and the amount of wear of the brake magnet reaches a first threshold value or a multiple of the first threshold value and is less than a second threshold value. Also disclosed is a motor comprising such a wear monitoring system. Also disclosed is an elevator comprising such a wear monitoring system or motor.

Description

Technical Field

[0001] This invention relates to a wear monitoring system for use in the braking mechanism of a motor, and more specifically, for use in the motor of an elevator. The invention also relates to an elevator incorporating such a wear monitoring system. Background Technology

[0002] In the existing technology, the device used to monitor the wear of the brake magnet of the motor's braking device can only monitor a single amount of wear. For other wear amounts that need to be monitored, manual measurement is required, which is time-consuming, labor-intensive, costly, and unreliable, and cannot effectively ensure safety.

[0003] Therefore, a new wear monitoring system is needed that can at least overcome this deficiency in the existing technology. Summary of the Invention

[0004] Therefore, according to a first aspect of the present invention, a wear monitoring system is provided for a braking device of a motor.

[0005] The braking device includes a fixedly mounted brake disc and a brake magnet, the brake magnet being movable relative to the brake disc to switch between an engaged state (engaged with the brake disc) and a disengaged state (disengaged from the brake disc).

[0006] The wear monitoring system includes:

[0007] Fixed bracket;

[0008] The first arm portion includes a first free end and is configured to interact with the brake magnet so that the first free end is always in contact with the bottom of the brake magnet.

[0009] The second arm portion is configured to be linked with the first arm portion and includes a second free end portion.

[0010] The triggering device includes a trigger button, which is configured to be triggered by the second free end of the second arm portion when the brake magnet and the brake disc are in the attracted state, and when the wear of the brake magnet reaches a first threshold or a multiple of the first threshold and is less than a second threshold. The second threshold is greater than the first threshold.

[0011] Therefore, the wear monitoring system proposed in this invention eliminates the need for manual measurement and achieves automatic monitoring of the wear state of the brake magnet, saving costs; and by triggering a button when the wear of the brake magnet reaches a first threshold or a multiple of the first threshold to provide an indication of the wear amount, more reliable wear monitoring is achieved, enhancing safety.

[0012] The wear monitoring system of the present invention may further include one or more of the following improvements.

[0013] In some embodiments, the wear monitoring system further includes an adjustable positioning component for defining the separation position of the brake magnet in the separated state.

[0014] In some embodiments, when the brake magnet is not worn, in the separated state, the brake magnet is separated from the brake disc by a first distance; after each trigger button is triggered, the positioning component is adjusted by the first threshold so that the brake magnet and the brake disc are separated by the first distance in the separated state.

[0015] In some embodiments, the triggering device is configured to be displaced relative to the bracket by a displacement amount associated with the first threshold after each triggering of the trigger button.

[0016] In some embodiments, a fixed positioning block is also included, wherein the wear of the brake magnet reaches the second threshold when the triggering device is moved to a position that contacts the positioning block.

[0017] In some embodiments, the first arm portion and the second arm portion are both integrally formed single arm portions, and the single arm is configured to pivot about a pivot pin fixedly mounted on the bracket to generate linkage between the second arm portion and the first arm portion.

[0018] In some embodiments, the length of the first arm portion is shorter than the length of the second arm portion.

[0019] In some embodiments, a counterweight is provided at the second free end, the counterweight being configured to apply a triggering force to trigger the trigger button.

[0020] In some embodiments, the first free end is provided with a ball that contacts the bottom of the braking magnet.

[0021] In some embodiments, the bracket is provided with a first guide portion, and the triggering device is provided with a second guide portion, the first guide portion cooperating with the second guide portion to move the triggering device relative to the bracket.

[0022] In some embodiments, the first guide is a slot or screw, and the second guide is correspondingly a screw or slot.

[0023] In some embodiments, the positioning element is a screw that can be screwed in and out relative to the housing of the motor.

[0024] In some embodiments, the first threshold is 0.5 mm, and / or the second threshold is 2.1 mm.

[0025] According to a second aspect of the invention, a motor is provided that includes the wear monitoring system as described above.

[0026] According to a third aspect of the invention, an elevator is provided, which includes a wear monitoring system or motor as described above.

[0027] In some embodiments according to a third aspect of the invention, in the elevator, a trigger button is associated with a safety circuit of the elevator, which, when the trigger button is triggered, activates to stop the elevator. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0029] Figure 1 This is a front view of a wear monitoring system assembled with a braking device according to an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 First perspective view of the wear monitoring system in the image;

[0031] Figure 3 yes Figure 1 A second perspective view of the wear monitoring system in the image;

[0032] Figure 4 yes Figure 1 First plan view of the wear monitoring system in the image;

[0033] Figure 5 yes Figure 1 The second plan view of the wear monitoring system in the image.

[0034] List of reference numerals

[0035] 10 Wear Monitoring System

[0036] 100 brackets

[0037] 110 shaft pin

[0038] 130 First Guiding Department

[0039] 200 First arm section

[0040] 210 First Free End

[0041] 211 balls

[0042] 300 Second arm section

[0043] 310 Second Free End

[0044] 320 counterweight

[0045] 400 trigger device

[0046] 410 Trigger Button

[0047] 430 Second Guiding Section

[0048] 500 positioning components

[0049] 600 positioning block

[0050] 20 motors

[0051] 21. Shell

[0052] 30 Braking device

[0053] 31 Brake disc

[0054] 32 Braking magnets

[0055] 321 Bottom Specific Implementation

[0056] The wear monitoring system according to embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present disclosure.

[0057] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.

[0058] Unless the context otherwise defines, the singular form includes the plural form. Throughout this specification, the terms “comprising,” “having,” etc., are used herein to specify the presence of the stated features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0059] Furthermore, even though ordinal terms such as "first" and "second" may be used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one component from other components. For example, without departing from the scope of this disclosure, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

[0060] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the disclosed product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this disclosure and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0061] like Figure 1-5 As shown, the wear monitoring system 10 proposed according to an embodiment of the present invention is used for the braking device 30 of a motor 20, and more specifically for monitoring the wear condition of the braking device 30 of the motor 20. The braking device 30 includes a fixedly mounted brake disc 31 and a brake magnet 32, which is configured to move relative to the brake disc 31 to switch between an engaged state (engaged with the brake disc 31) and a disengaged state (disengaged from the brake disc 31). In one specific embodiment, the brake magnet 32 ​​forms a toothed engagement with the motor 20, and the brake magnet 32 ​​can slide freely up and down relative to the motor 20 along the teeth. More specifically, when power is off, the magnetism of the brake magnet 32 ​​causes it to engage with the brake disc 31, and the friction between the brake magnet 32 ​​and the brake disc 31 generates a braking effect, preventing the motor 20 from operating; when power is on, the magnetism of the brake magnet 32 ​​disappears, and it separates from the brake disc 31 under gravity, thus ceasing its braking effect and allowing the motor 20 to operate.

[0062] With the use of the braking device 30, the brake magnet 32 ​​of the braking device 30 will wear due to friction with the brake disc 31. More specifically, when the brake magnet 32 ​​has no wear, in the disengaged state, the brake magnet 32 ​​separates from the brake disc 31 at a first distance; however, as wear occurs, in the disengaged state, the brake magnet 32 ​​will separate from the brake disc 31 at a second distance greater than the first distance. After the wear of the brake magnet 32 ​​reaches a certain level, it will affect the effective engagement between the brake magnet 32 ​​and the brake disc 31, thereby affecting the braking action of the braking device 30 and creating a safety hazard. Therefore, it is necessary to monitor the wear of the brake magnet 32 ​​to ensure that the braking device 30 can operate effectively and thus ensure safety. To this end, the present invention aims to propose a wear monitoring system 10, which can automatically monitor the wear state of the brake magnet 32 ​​without manual measurement, and can trigger a button to give an indication of the wear amount when the wear of the brake magnet 32 ​​reaches a first threshold or a multiple of the first threshold, achieving more reliable wear monitoring, enhancing safety, and saving costs.

[0063] like Figure 1-5 As shown, according to some embodiments, the wear monitoring system includes a fixedly mounted bracket 100 and includes a first arm portion 200, a second arm portion 300, and a triggering device 400, as will be described in detail below.

[0064] like Figure 1-5 As shown, the first arm portion 200 includes a first free end 210, and is configured to be linked with the brake magnet 32 ​​so that the first free end 210 is always in contact with the bottom 321 of the brake magnet 32. In a more specific embodiment, the first free end 210 of the first arm portion 200 may be provided with a ball 211 for contacting the bottom 321 of the brake magnet 32, which can ensure that the first free end 210 and the brake magnet 32 ​​maintain good contact throughout the entire operation. The second arm portion 300 is configured to be linked with the first arm portion 200 and includes a second free end 310. In a more specific embodiment, the first arm portion 200 and the second arm portion 300 may both be integrally formed single-arm portions, which are configured to be pivotable about a pivot pin 110 fixedly mounted on the bracket 100 to generate linkage between the second arm portion 300 and the first arm portion 200. That is, a hole can be provided in the middle section of the single arm, into which the pivot pin 110 on the bracket 100 is inserted in the assembled state, allowing the single arm to pivot about the pivot pin 110—this allows the first arm portion 200 and the second arm portion 300 to form a structure similar to a "seesaw". This achieves a very simple and compact structure, saving manufacturing, installation, and assembly costs and space. It should be noted that this specific implementation is merely exemplary and not limiting, and any means that can achieve these linkages are included within the scope of protection of this application.

[0065] like Figure 4-5 As shown, a trigger button 410 can be provided on the triggering device 400. This trigger button 410 is configured to be triggered by the second free end 310 of the second arm portion 300 when the wear of the brake magnet 32 ​​reaches a first threshold or a multiple of the first threshold but is less than a second threshold, and the brake magnet 32 ​​and brake disc 31 are in an engaged state. The second threshold is greater than the first threshold. That is, in this case, as the brake magnet 32 ​​and brake disc 31 switch from a disengaged state to an engaged state, the first arm portion 200 can move in tandem with the brake magnet 32 ​​via its first free end 210, while the second arm portion 300 moves in tandem with the first arm portion 200, allowing its second free end 310 to trigger the trigger button 410. In a more specific embodiment, the trigger button 410 can be associated with a safety circuit, and triggering the trigger button 410 can cause the safety circuit to close. In a specific embodiment, the wear monitoring system 10 is used in an elevator, and triggering the trigger button 410 can cause the elevator to stop via the safety circuit.

[0066] In one specific implementation, the first threshold can be 0.4–0.6 mm, for example, 0.5 mm, and the second threshold can be 2.0–2.2 mm, for example, 2.1 mm. However, it should be noted that such specific values ​​are merely exemplary and not limiting, and the specific values ​​of the first and second thresholds can be set according to actual needs.

[0067] In some embodiments, such as Figure 4-5 As shown, the length of the first arm portion 200 can be set to be shorter than the length of the second arm portion 300. This allows the wear of the brake magnet 32 ​​to be amplified through the lever principle, which allows for a reduction in the monitoring error of the wear monitoring system 10 and an increase in its reliability.

[0068] In some embodiments, such as Figure 1-5 As shown, a counterweight 320 can be provided at the second free end 310 of the second arm portion 300. This counterweight 320 is at least configured to apply a triggering force to activate the trigger button 410. More specifically, when the wear of the brake magnet 32 ​​reaches a point where the trigger button 410 needs to be activated, the presence of the counterweight 320 will allow the second free end 310 of the second arm portion 300 to apply sufficient triggering force to the trigger button 410. Furthermore, the counterweight 320 also allows for the linkage between the first arm portion 200 and thus the second arm portion 300 and the brake magnet 32 ​​via a lever principle, ensuring that the first free end 210 moves with the brake magnet 32, thereby further ensuring the reliability of the wear monitoring system 10.

[0069] It should be noted that in the above embodiments and implementations, before the wear of the brake magnet 32 ​​reaches the second threshold, after each trigger button 410 is triggered, it is necessary to first adjust the distance of the brake magnet 32 ​​relative to the brake disc 31 in the separated state so that the distance is equal to the first distance mentioned above, and then reset the trigger button 410.

[0070] Therefore, such as Figure 1 As shown, in some embodiments, the wear monitoring system 10 may further include an adjustable positioning component 500, which can be used to define the separation position of the brake magnet 32 ​​in the separated state. Furthermore, after each triggering of the trigger button 410, i.e., when the wear of the brake magnet 32 ​​reaches a first threshold or a multiple of the first threshold, the positioning component 500 can be adjusted, more specifically adjusted to the first threshold, so that the brake magnet 32 ​​and the brake disc 31 are separated again by a first distance in the separated state. In some more specific embodiments, the positioning component 500 is a screw that can be screwed in and out relative to the housing 21 of the motor 20, changing the separation distance of the brake magnet 32 ​​in the separated state with the amount of screwing in or out. In this way, the dual functions of defining the separation position of the brake magnet 32 ​​and adjusting its separation distance from the brake disc 31 can be achieved with a very simple construction.

[0071] In a more specific embodiment, after each trigger button 410 is triggered, that is, when the wear of the brake magnet 32 ​​reaches the first threshold or a multiple of the first threshold, the position of the trigger button 410 relative to the bracket 100 is adjusted to ensure that the second free end 310 of the second arm portion 300 can trigger the trigger button 410 when the wear of the brake magnet 32 ​​reaches a multiple of the first threshold again.

[0072] Furthermore, as the wear of the brake magnet 32 ​​gradually increases, when it reaches the second threshold, the brake magnet 32 ​​may be unable to properly engage or disengage from the brake disc 31, thus rendering the brake device 30 inoperable and requiring replacement. Therefore, it is necessary to monitor this second threshold.

[0073] Therefore, such as Figure 3 and 5As shown, in some embodiments, the triggering device 400 may be configured to be displaceable relative to the bracket 100, for example, manually. In a variation, the trigger button 410 may be displaced together with the triggering device 400. More specifically, the triggering device 400 is configured to be displaced relative to the bracket 100 by an amount associated with a first threshold after each triggering of the trigger button 410. For example, the amount of displacement may be approximately: (length of the second arm portion 300 × first threshold) / length L1 of the first arm portion. In a more specific embodiment, the wear monitoring system 10 may further include a fixedly disposed positioning block 600, for example disposed on the bracket 100, and configured such that when the triggering device 400 is displaced to a position contacting the positioning block 600, it indicates that the wear of the brake magnet 32 ​​has reached a second threshold. Thus, the arrival of the second threshold can be monitored accurately and effectively in a simple manner by means of the positioning block 600, thereby eliminating manual measurement and saving costs.

[0074] In some embodiments, such as Figure 3 and 5 As shown, a first guide portion 130 may be provided on the bracket 100, and a second guide portion 430 may be provided on the trigger device 400. The first guide portion 130 and the second guide portion 430 can cooperate to move the trigger device 400 relative to the bracket 100. More specifically, the first guide portion 130 is a slot or screw, and the second guide portion 430 is correspondingly a screw or slot. In this case, the screw or slot can also be configured to fix the trigger device 400 relative to the bracket 100 in the initial state or after each displacement of the trigger device 400.

[0075] According to a second aspect of the invention, a motor 20 is provided, which may include the wear monitoring system 10 as described above.

[0076] According to a third aspect of the invention, an elevator is provided, which may include the wear monitoring system 10 or the motor 20 as described above. In some embodiments of the third aspect of the invention, as described above, in this elevator, a trigger button 410 may be associated with a safety circuit of the elevator, which, when the trigger button 410 is triggered, activates to stop the elevator.

[0077] The exemplary implementation of the wear monitoring system proposed in this invention has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this invention, and various combinations can be made to the various technical features and structures proposed in this invention without exceeding the protection scope of this invention.

[0078] The scope of this disclosure is not limited by the embodiments described above, but by the appended claims and their equivalents.

Claims

1. A wear monitoring system for a brake arrangement of a motor, the brake arrangement comprising a stationary brake disc and a brake magnet movable relative to the brake disc between an engaged state in which the brake magnet is engaged with the brake disc and a disengaged state in which the brake magnet is disengaged from the brake disc, the wear monitoring system comprising: a stationary holder; a first arm portion comprising a first free end and arranged in communication with the brake magnet such that the first free end is always in contact with a bottom of the brake magnet; a second arm portion arranged in communication with the first arm portion and comprising a second free end; a triggering device comprising a triggering button arranged to be triggered by the second free end of the second arm portion when the brake magnet is in the engaged state and when an amount of wear of the brake magnet reaches a first threshold value or a multiple of the first threshold value and is less than a second threshold value, the second threshold value being greater than the first threshold value, wherein the triggering device is arranged to be displaced relative to the holder by a displacement amount after each triggering of the triggering button, the displacement amount being associated with the first threshold value, and further comprising a stationary positioning block, wherein the positioning block is arranged such that the amount of wear of the brake magnet reaches the second threshold value when the triggering device is displaced to a position in which the positioning block is contacted. wherein 2. The wear monitoring system according to claim 1, further comprising an adjustable positioning member for defining a disengaged position of the brake magnet in the disengaged state.

3. The wear monitoring system according to claim 2, wherein, in the disengaged state, the brake magnet is separated from the brake disc by a first distance when the brake magnet is not worn, and wherein, after each triggering of the triggering button, the positioning member is adjusted by the first threshold value such that the brake magnet is separated from the brake disc by the first distance in the disengaged state.

4. The wear monitoring system according to any one of claims 1 to 3, wherein the first arm portion and the second arm portion are parts of a single arm integrally formed, the single arm being arranged to be pivotable about a stationary pivot pin arranged on the holder to create the communication of the second arm portion with the first arm portion.

5. The wear monitoring system according to any one of claims 1 to 4, wherein a length of the first arm portion is shorter than a length of the second arm portion.

6. The wear monitoring system according to any one of claims 1 to 5, wherein a counterweight is arranged at the second free end, the counterweight being arranged to exert a triggering force for triggering the triggering button.

7. The wear monitoring system according to any one of claims 1 to 6, wherein the first free end is provided with a ball arranged to contact the bottom of the brake magnet.

8. The wear monitoring system according to any one of claims 1 to 7, wherein a first guide is arranged on the holder and a second guide is arranged on the triggering device, the first guide and the second guide cooperating to move the triggering device relative to the holder.

9. The wear monitoring system according to claim 8, wherein the first guide is a slot or a screw and the second guide is a screw or a slot, respectively.

10. The wear monitoring system according to any one of claims 1 to 9, wherein the positioning member is a screw arranged to be screwed into and out of a housing of the motor. wherein, 11. The wear monitoring system according to any one of claims 1 to 10, wherein the first threshold value is 0.5 mm and / or the second threshold value is 2.1 mm.

12. A motor comprising the wear monitoring system according to any one of claims 1 to 11.

4. The wear monitoring system of claim 1, wherein, ​ 5. The wear monitoring system of claim 4, wherein, ​ 6. The wear monitoring system of claim 5, wherein, ​ 7. The wear monitoring system of any one of claims 1 to 5, wherein, ​ 8. The wear monitoring system of any one of claims 1 to 5, wherein, ​ 9. The wear monitoring system of claim 8, wherein, ​ 10. The wear monitoring system of claim 2 or 3, wherein, ​ 11. The wear monitoring system of any one of claims 1 to 5, wherein, ​ ​ 13. An elevator comprising a wear monitoring system according to any one of claims 1 to 11 or a motor according to claim 12.

14. The elevator of claim 13, wherein, The trigger button is associated with a safety circuit of the elevator, the safety circuit functioning to shut down the elevator when the trigger button is triggered.

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