Brake distance detection mechanism

Abstract

The utility model discloses a brake distance detection mechanism, and belongs to the technical field of traction machine brakes. The brake comprises a static iron core, a movable iron core and a brake component which are sequentially arranged and installed, brake rubber is installed on the brake component, and the brake component acts along with the movable iron core to brake and release the traction machine. A sensed piece is directly or indirectly installed on the movable iron core, the distance sensor comprises a distance detection part and an output end, the distance detection part and the sensed piece are oppositely arranged, the distance detection part is used for detecting the distance B between the distance detection part and the sensed piece, and the output end transmits data of the collected distance B. The device has the advantages that the specific working clearance of the brake is detected through the distance sensor, so that the working condition of the brake is judged, the brake rubber abrasion condition is known, the safety of the brake is improved, the structure is simple, and the service life is long.

Description

Technical Field

[0001] The utility model belongs to the technical field of traction machine brakes, and particularly relates to a brake distance detection mechanism. Background Art

[0002] Traditionally, brakes on elevator traction machines have been equipped with microswitches to detect brake application and release. When the microswitch is triggered by a component on the brake, it responds accordingly, closing the normally open contact and opening the normally closed contact, signaling the control system that the brake is functioning properly. Otherwise, the control system initiates appropriate procedures, such as an alarm or emergency brake activation. A microswitch typically consists of a spring-loaded contact and a movable contact. When an external force acts on the contact, the movable contact shifts, changing the switch state. Because microswitches are mechanical, they can experience mechanical fatigue in their various operating components during frequent brake operation, potentially leading to errors over time. Consequently, they require frequent maintenance, commissioning, or replacement.

[0003] To this end, the industry has begun using contactless switches to replace microswitches to detect brake application and release. These switches offer advantages such as high detection accuracy, reliable operation, stable performance, and a long service life, overcoming the shortcomings of microswitches. However, the contactless switches currently installed on elevator traction machines can only detect whether the brake is in the applied or released state by using on and off signals. Beyond this, they have no other functions and are limited in functionality, failing to meet the requirements of today's intelligent control applications.

[0004] In view of the above-mentioned prior art, it is necessary to make further improvements to the existing brake detection structure. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0005] The task of the utility model is to provide a brake distance detection mechanism, which can detect the specific working gap of the brake through a distance sensor, thereby judging the working condition of the brake and understanding the wear of the brake shoe, thereby improving the safety of the brake.

[0006] The task of the utility model is accomplished in this way. A brake distance detection mechanism, the brake includes a static iron core, a moving iron core and a brake component arranged in sequence, a brake shoe is installed on the brake component, and the brake component follows the movement of the moving iron core to achieve braking and releasing of the traction machine. The characteristics are: a distance sensor is directly or indirectly installed on the static iron core, and a sensed component is directly or indirectly installed on the moving iron core. The distance sensor includes a distance detection part and an output end. The distance detection part is arranged opposite to the sensed component. The distance detection part is used to detect the distance B between the distance detection part and the sensed component, and the output end transmits the collected data of the distance B.

[0007] In a specific embodiment of the present invention, the output end is electrically connected to a data acquisition component, and the data acquisition component is electrically connected to a control cabinet.

[0008] In another specific embodiment of the present invention, the control cabinet is electrically connected to an alarm device.

[0009] In another specific embodiment of the present invention, a distance sensor is indirectly mounted on the static iron core. Specifically, the distance sensor is mounted on a mounting member that is additionally fixed on the static iron core.

[0010] In another specific embodiment of the present invention, the distance sensor is mounted on the static iron core via a first mounting plate, and the first mounting plate is fixed on the static iron core.

[0011] In another specific embodiment of the present invention, a sensed component is indirectly mounted on the moving iron core. Specifically, the sensed component is mounted on a mounting component that is additionally fixed on the moving iron core.

[0012] In a further specific embodiment of the present invention, the sensed component is mounted on the moving iron core via a second mounting plate, and the second mounting plate is fixed on the moving iron core.

[0013] In a more specific embodiment of the present invention, the distance detection unit and the output end are installed in a housing, and the housing is directly or indirectly installed on the static iron core.

[0014] Due to the adoption of the above structure, the present invention has the following beneficial effects: first, the specific numerical value change between the static iron core and the moving iron core is detected by the distance sensor, and is promptly transmitted to the control cabinet, which determines the working condition of the brake and replaces the brake pads in time, thereby improving the safety of the brake. A distance sensor can simultaneously determine the working condition of the brake, the wear condition of the brake pads and other data, and has a simple structure and comprehensive functions; second, the distance sensor will not produce mechanical fatigue due to frequent contact, thereby losing the function of detecting the switch, thereby extending its service life; third, it is suitable for the requirements of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of an elevator system;

[0016] Figure 2 This is a schematic diagram of the brake of the present invention in a braking state;

[0017] Figure 3 for Figure 2 The enlarged view of point a in the figure;

[0018] Figure 4 This is a schematic diagram of the brake of the present invention in a released state;

[0019] Figure 5 for Figure 4 The enlarged view of point b in the figure;

[0020] Figure 6 This is a structural block diagram of the distance detection mechanism of the present utility model.

[0021] In the figure: 10. Brake, 1. Distance sensor, 11. Distance detection unit, 12. Output end, 13. Housing; 2. Sensed component; 3. Static iron core, 31. Coil assembly, 32. Brake spring; 4. Moving iron core; 5. Braking component, 51. Brake shoe; 6. First mounting plate; 7. Second mounting plate; 8. Data acquisition component; 9. Alarm device; 20. Motor; 30. Traction sheave; 40. Wire rope; 50. Car; 60. Counterweight; 70. Control cabinet. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.

[0023] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the positions shown in the corresponding drawings, and therefore cannot be understood as a special limitation on the technical solution provided by the present invention.

[0024] See also Figures 1 to 4 The utility model relates to a brake distance detection mechanism, wherein the brake is the brake 10 in the figure, which is a safety component of the elevator traction machine. The traction machine includes a motor 20, a brake 10, a traction wheel 30 and other components.

[0025] The brake 10 is a disc brake, a block brake, or a caliper brake. Each type of brake comprises a static iron core 3, a moving iron core 4, and a brake component 5, which are arranged in sequence. A brake shoe 51 is mounted on the brake component. The brake shoe 51 cooperates with the braked component that operates synchronously with the traction sheave 10. The brake component 5 brakes and releases the traction machine as the moving iron core 4 moves. In this embodiment, Figure 2 As shown, the disc brake is used as an example for explanation.

[0026] The stationary iron core 3 houses a coil assembly 31 and a brake spring 32. When the brake is de-energized, the brake spring 32 in the stationary iron core 3 pushes against the movable iron core 4, which in turn drives the brake component 5 to brake the traction machine, preventing the traction sheave 30 from rotating. The gap between the stationary iron core 3 and the movable iron core 4 at this point represents the stroke A of the brake 10 during braking or release.

[0027] When the coil assembly 31 in the stationary iron core 3 is energized, a magnetic circuit is formed in the air gap between the stationary iron core 3 and the movable iron core 4, generating an electromagnetic force. This electromagnetic force overcomes the spring force of the brake spring 32, drawing the stationary iron core 3 and movable iron core 4 together and eliminating the gap between them. At this point, the brake 10 releases the traction sheave 30 of the traction machine, allowing the traction machine to drive the wire rope 40, dragging the car 50 and counterweight 60 in relative motion.

[0028] A distance sensor 1 is mounted directly or indirectly on the static iron core 3, and a sensed element 2 is mounted directly or indirectly on the moving iron core 4. The distance sensor 1 is mounted indirectly on the static iron core 3. Specifically, the distance sensor 1 is mounted on a mounting member fixed to the static iron core 3. In this embodiment, the distance sensor 1 is mounted on the static iron core 3 via a first mounting plate 6, which is fixed to the static iron core 3.

[0029] The distance sensor 1 includes a distance detection unit 11, an output terminal 12, and a housing 13 for mounting the distance detection unit 11 and the output terminal 12. The distance detection unit 11 is positioned opposite the sensed element 2. The housing 13 is mounted directly or indirectly on the stationary iron core 3. The sensed element 2 is indirectly mounted on the movable iron core 4. Specifically, the sensed element 2 is mounted on a mounting member fixed to the movable iron core 4. In this embodiment, the sensed element 2 is mounted to the movable iron core 4 via a second mounting plate 7, which is fixed to the movable iron core 4. The distance detection unit 11 is used to detect the specific distance B between the distance detection unit 11 and the sensed element 2, thereby reflecting the data change value of the specific distance between the stationary iron core 3 and the movable iron core 4. The distance detection unit 11 detects by converting the measured non-electrical physical quantity into a change in an electrical physical parameter, and then transmits a signal after data processing. In this embodiment, the measured non-electrical physical quantity is displacement, thereby detecting the working clearance of the brake.

[0030] The output terminal 12 transmits the data collected regarding the specific distance B. Specifically, the output terminal 12 is electrically connected to the data acquisition component 8, which is in turn electrically connected to the control cabinet 70, which is in turn electrically connected to the alarm device 9. The data acquisition component 8 collects the specific distance B between the distance detection unit 11 and the sensed component 2, as detected by the distance sensor 1. The data acquisition component 8 then transmits the data regarding the specific distance B to the control cabinet 70, which analyzes and determines the specific distance B based on the received value.

[0031] Please continue reading Figures 2 to 6 The working principle of the brake distance detection mechanism described in this embodiment is:

[0032] When the brake is debugged, the working gap between the static iron core 3 and the moving iron core 4 is A. The moving iron core 4 is away from the static iron core 3 under the action of the brake spring 32. Figure 3 As shown, at this time, the distance sensor 1 detects that the distance between it and the sensed component 2 is B1; when the brake is in the released state, at this time, as shown in FIG. Figure 4 、 Figure 5 As shown, the distance sensor 1 detects a distance B=B1-A between the distance sensor 1 and the sensed component 2. When the output terminal outputs the distance B=B1-A, it indicates that the brake is in a braking state.

[0033] Assume that the allowable wear of the brake shoe 51 is A1. That is, when the brake is in the braking state, the distance between the static iron core 3 and the movable iron core 4 increases, and the distance between the distance detection unit 11 and the sensed component 2 also increases. When the distance sensor 1 detects that the distance B between it and the sensed component 2 is between B1 and B1 + A1, it indicates that the brake is in a normal braking state and the brake shoe 51 is not worn. When the distance sensor 1 detects that the distance B between it and the sensed component 2 is greater than B1 + A1, it indicates that the brake shoe 51 is worn. The control cabinet 70 will send a command to the alarm device 9, causing it to issue an alarm signal, requiring maintenance personnel to replace the brake shoe and re-adjust the brake.

[0034] This embodiment uses a disc brake as an example to illustrate the installation structure and effectiveness of the distance detection mechanism. The same effect can be achieved when installed on a block brake or caliper brake. As the brake shoe 51 wears, the distance between the static iron core 3 and the movable iron core 4 increases until it exceeds the allowable spacing. Distance sensor 1 uses the measured data to determine whether the brake 10 provides sufficient braking torque and effective braking time, thereby ensuring safe elevator operation. During use, the detected distance data can be collected and stored for more accurate analysis and early warning, allowing for the prediction of brake shoe wear.

Claims

1. A brake distance detection mechanism, wherein the brake (10) comprises a static iron core (3), a moving iron core (4) and a brake component (5) arranged in sequence, a brake shoe (51) being mounted on the brake component (5), and the brake component (5) following the movement of the moving iron core (4) to achieve braking and releasing of the traction machine, characterized in that: A distance sensor (1) is directly or indirectly mounted on the static iron core (3), and a sensed component (2) is directly or indirectly mounted on the moving iron core (4). The distance sensor (1) comprises a distance detection unit (11) and an output end (12). The distance detection unit (11) and the sensed component (2) are arranged opposite to each other. The distance detection unit (11) is used to detect a distance B between the distance detection unit (11) and the sensed component (2). The output end (12) transmits the collected data of the distance B.

2. A brake distance detection mechanism according to claim 1, characterized in that: The output end (12) is electrically connected to the data acquisition component (8), and the data acquisition component (8) is electrically connected to the control cabinet (70).

3. A brake distance detection mechanism according to claim 2, characterized in that: The control cabinet (70) is electrically connected to the alarm device (9).

4. The brake distance detection mechanism according to claim 1, characterized in that: The distance sensor (1) is indirectly mounted on the static iron core (3). Specifically, the distance sensor (1) is mounted on a mounting member that is additionally fixed on the static iron core (3).

5. A brake distance detection mechanism according to claim 4, characterized in that: The distance sensor (1) is mounted on the static iron core (3) via a first mounting plate (6), and the first mounting plate (6) is fixed on the static iron core (3).

6. The brake distance detection mechanism according to claim 1, characterized in that: The sensed component (2) is indirectly mounted on the moving iron core (4). Specifically, the sensed component (2) is mounted on a mounting component that is additionally fixed on the moving iron core (4).

7. The brake distance detection mechanism according to claim 6, characterized in that: The sensed component (2) is mounted on the moving iron core (4) via a second mounting plate (7), and the second mounting plate (7) is fixed on the moving iron core (4).

8. The brake distance detection mechanism according to claim 1, characterized in that: The distance detection unit (11) and the output end (12) are installed in a housing (13), and the housing (13) is directly or indirectly installed on the static iron core (3).

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