A magnetic scale broken belt detection device

Abstract

The present invention discloses a magnetic scale belt break detection device, which includes a fixed platform and a belt break detection component. The fixed platform is slidably connected to the magnetic scale. The belt break detection component includes a connecting plate, a belt break trigger structure, and a detection switch. The connecting plate is slidably connected to the fixed platform, the connecting plate is connected to the magnetic scale, and the connecting plate is connected to the belt break trigger structure. In the present invention, when the magnetic scale belt breaks, the magnetic scale is affected by gravity, slides on the fixed platform, and gradually falls off the fixed platform. The magnetic scale is connected to the connecting plate. During the falling process of the magnetic scale, the edge of the first through hole cuts off the anti-accidental touch barrier rod, and the magnetic scale drives the connecting plate to fall off the fixed platform together. The belt break trigger structure triggers the detection switch under the action of the connecting plate movement, thereby triggering the protection mechanism of the elevator operation system. A simple mechanical structure is used to detect the belt break of the elevator magnetic scale, without relying on electric triggering, and the reliability is high.

Description

Technical Field

[0001] The present invention relates to the field of elevator safety detection, and in particular to a magnetic scale break detection device. Background Art

[0002] Magnetic scales are commonly used as car positioning devices in elevators. They provide real-time reading of car position and are easy to install. A common fault with elevator magnetic scales is a breakage, which can cause the elevator to malfunction. Therefore, the present invention provides a device for detecting magnetic scale breakage, designed to detect whether an elevator magnetic scale has broken.

[0003] In the related technology, the magnetic scale passes through the pressure plate hinged on the elevator, and uses an electromagnet to attract the pressure plate. The electromagnet is energized to limit the movement of the pressure plate. The elevator is placed in normal operation and braking states respectively by turning the electromagnet on and off. The structure is complex and the cost is high. The effectiveness of the electromagnet is affected by its lifespan and is difficult to maintain for a long time, which poses a great safety hazard. In addition, the electromagnet is in the energized state for a long time, and the energy consumption is high. Summary of the Invention

[0004] In order to solve at least one of the above technical problems, the present invention provides a magnetic scale break detection device, and the technical solution adopted is as follows:

[0005] The present invention provides a magnetic scale break detection device, which includes a fixed platform and a break detection component. The fixed platform is horizontally arranged and can be slidably connected to the magnetic scale. When the magnetic scale breaks, part of the magnetic scale falls off the fixed platform; the break detection component includes a connecting plate, a break trigger structure, and a detection switch. The connecting plate is vertically arranged, and a first through hole is provided on the fixed platform. The connecting plate passes through the first through hole and is slidably connected to the fixed platform. An anti-accidental touch barrier rod is provided on the connecting plate, and the anti-accidental touch barrier rod is clamped on the edge of the first through hole. The connecting plate can be connected to the magnetic scale, and the connecting plate is connected to the break trigger structure. When the magnetic scale breaks, the anti-accidental touch barrier rod is cut off, and the magnetic scale drives the connecting plate to fall off the fixed platform, so that the break trigger structure presses the detection switch.

[0006] The embodiments of the present invention have at least the following beneficial effects: In the present invention, when the magnetic scale breaks, the magnetic scale is affected by gravity, slides on the fixed platform, and gradually falls off the fixed platform. The magnetic scale is connected to the connecting plate. During the falling of the magnetic scale, the connecting plate is subjected to a sufficiently large traction force to cause the edge of the first through hole to cut off the anti-accidental touch barrier rod, and the magnetic scale drives the connecting plate to fall off the fixed platform together. The broken belt trigger structure triggers the detection switch under the action of the connecting plate movement, thereby triggering the protection mechanism of the elevator operation system. A simple mechanical structure is used to detect the broken belt of the elevator magnetic scale, without relying on electric triggering, and the reliability is high.

[0007] In certain embodiments of the present invention, the broken belt trigger structure includes a spring and a spring bracket, the spring bracket is arranged on the fixed platform, the first end of the spring is horizontally connected to the spring bracket, the second end of the spring abuts against the first side of the connecting plate, the detection switch is horizontally arranged, and the operating end of the detection switch abuts against the second side of the connecting plate.

[0008] In certain embodiments of the present invention, the broken belt trigger structure also includes a spring push rod and a sleeve. A mounting hole is provided in the middle of the spring bracket, the first end of the spring push rod passes through the mounting hole, and the second end of the spring push rod is provided with an extrusion plate, the extrusion plate is connected to the second end of the spring, and the extrusion plate abuts against the first side of the connecting plate. The sleeve is connected to the spring bracket, the spring is inside the sleeve, the extrusion plate is slidably connected to the sleeve, a notch is provided on the side wall of the sleeve, the top edge of the connecting plate can pass through the notch and be inside the sleeve, and the operating end of the detection switch extends into the sleeve.

[0009] In certain embodiments of the present invention, the broken belt trigger structure includes a baffle, a lock plate, and a touch plate. The touch plate is arranged on the connecting plate, the middle part of the touch plate is hinged to the connecting plate, the first end of the touch plate abuts the detection switch, the second end of the lock plate is hinged to the connecting plate, a hollow portion is provided on the lock plate, and a hinge shaft is provided at the second end of the touch plate, the hinge shaft is in the hollow portion, the lock plate is rotatably connected to the touch plate, the baffle is provided on the fixed platform, and the baffle is below the lock plate. When the connecting plate slides downward, the touch plate triggers the detection switch.

[0010] In certain embodiments of the present invention, the hollow portion includes a sliding unit and a locking unit, the sliding unit is connected to the locking unit, the sliding unit is straight, the locking unit is close to the first end of the lock plate, the sliding unit and the locking unit are at an angle, when the hinge shaft is stuck in the locking unit, the relative position of the touch plate and the lock plate is stable, and when the hinge shaft is in the sliding unit, the touch plate and the lock plate can rotate and move relative to each other.

[0011] In certain embodiments of the present invention, the fixed platform includes a vertical portion, a first extension portion, and a second extension portion, wherein the first extension portion is at the top edge of the vertical portion and is angled to the vertical portion, the second extension portion is at the bottom edge of the vertical portion and is angled to the vertical portion, and both the first extension portion and the second extension portion are provided with a first through hole.

[0012] In some embodiments of the present invention, a second through hole is provided on the fixed platform, and the magnetic scale can pass through the second through hole. The magnetic scale can be slidably connected to the fixed platform. When the magnetic scale breaks, the magnetic scale slides along the second through hole.

[0013] In certain embodiments of the present invention, the magnetic scale break detection device further includes a counterweight block, which can be connected to the bottom end of the magnetic scale via a fastener.

[0014] In certain embodiments of the present invention, a steel wire rope is provided on the connecting plate, and the steel wire rope can be connected to the bottom end of the magnetic scale through a fastener.

[0015] In certain embodiments of the present invention, a connecting bolt is provided at the bottom of the connecting plate, and the steel wire rope is fixed to the bottom of the connecting plate through the connecting bolt.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 1 is a schematic structural diagram of a first embodiment of a magnetic scale break detection device according to the present invention;

[0019] Figure 2 This is a front view of a first embodiment of a magnetic scale break detection device according to the present invention;

[0020] Figure 32 is a schematic structural diagram of a second embodiment of a magnetic scale break detection device according to the present invention;

[0021] Figure 4 2 is a schematic structural diagram of a broken tape trigger structure in a second embodiment of a magnetic scale broken tape detection device according to the present invention;

[0022] Figure 5 It is a structural schematic diagram of the lock plate in the second embodiment of the magnetic scale break detection device of the present invention.

[0023] Reference numerals:

[0024] 101. Magnetic scale; 102. Counterweight;

[0025] 201. Connecting plate; 202. Detection switch; 203. Anti-accidental touch bar; 204. Wire rope; 205. Connecting bolt;

[0026] 301. Spring; 302. Spring bracket; 303. Spring push rod; 304. Sleeve;

[0027] 401. Blocking lever; 402. Locking plate; 403. Touch plate; 404. Sliding unit; 405. Locking unit;

[0028] 501. Vertical portion; 502. First extension portion; 503. Second extension portion. DETAILED DESCRIPTION

[0029] This section will combine Figures 1 to 5 Embodiments of the present invention are described in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The features defined as "first" and "second" are used to distinguish the feature names, and do not have special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] An embodiment of the present invention provides a device for detecting a broken tape of a magnetic scale 101 , which includes a fixed platform and a broken tape detection component.

[0033] The fixed platform is slidably connected to the magnetic scale 101. In elevators, the magnetic scale 101 is usually installed vertically. To ensure that the magnetic scale 101 can slide off the fixed platform due to gravity, the fixed platform is installed horizontally, approximately perpendicular to the magnetic scale 101. Furthermore, if the magnetic scale 101 breaks, the broken part at the bottom of the magnetic scale 101 will fall off the fixed platform due to gravity.

[0034] In some examples, a second via hole is provided on the fixed platform, through which the magnetic scale 101 is disposed. Specifically, the second via hole corresponds to the cross-sectional shape of the magnetic scale 101. While ensuring a sliding connection between the magnetic scale 101 and the fixed platform, the magnetic scale 101 is prevented from breaking due to large horizontal shaking, thereby ensuring the service life of the magnetic scale 101. It is understood that if the magnetic scale 101 breaks, it will fall off the fixed platform along the second via hole.

[0035] In some examples, the device for detecting a broken magnetic scale 101 further includes a counterweight 102, which is connected to the bottom end of the magnetic scale 101 via fasteners. This ensures that the combined magnetic scale 101 and counterweight 102 exert a greater gravity. When the magnetic scale 101 breaks, the downward trend of the magnetic scale 101 and the counterweight 102 becomes more pronounced, facilitating detection and preventing missed detection due to the magnetic scale 101 remaining attached to the fixed platform when broken due to the lower gravity.

[0036] The belt break detection assembly includes a connecting plate 201, a belt break trigger structure, and a detection switch 202. The connecting plate 201 is vertically positioned, and a first through-hole is provided on the fixed platform, through which the connecting plate 201 passes. Specifically, the connecting plate 201 is slidably connected to the fixed platform, allowing the connecting plate 201 to move within the first through-hole. Because the connecting plate 201 is vertical, the first through-hole is horizontally positioned to ensure the effectiveness of the sliding connection. It is understood that the connecting plate 201 has a tendency to fall out of the first through-hole due to gravity.

[0037] Among them, when the connecting plate 201 is connected to the fixed platform, the belt break trigger structure is in a braking state. When the connecting plate 201 falls off the fixed platform, the belt break trigger structure is activated. The activated trigger structure can trigger the detection switch 202. The detection switch 202 turns on the protection mechanism of the elevator operation system, thereby achieving the purpose of belt break detection. Therefore, when the magnetic scale 101 is working normally, the connecting plate 201 is always connected to the fixed platform. Furthermore, an anti-accidental touch barrier rod 203 is provided on the connecting plate 201. The anti-accidental touch barrier rod 203 protrudes from the surface of the connecting plate 201 and overlaps the edge of the first through hole to make the connecting plate 201 stuck on the fixed platform to prevent the connecting plate 201 from falling. When the magnetic scale 101 breaks, the anti-accidental touch barrier rod 203 is damaged, and the connecting plate 201 can indirectly trigger the detection switch 202 by falling.

[0038] In some examples, the fixed platform includes a vertical portion 501, a first extension portion 502, and a second extension portion 503. The first extension portion 502 is located at the top edge of the vertical portion 501, and the second extension portion 503 is located at the bottom edge of the vertical portion 501. The first extension portion 502 is angled with the vertical portion 501, and the second extension portion 503 is angled with the vertical portion 501. Specifically, the first extension portion 502 and the second extension portion 503 are approximately parallel and approximately horizontally arranged. The vertical portion 501, the first extension portion 502, and the second extension portion 503 are integrally bent and formed. The first extension portion 502 and the second extension portion 503 are both provided with first vias, and the connecting plate 201 passes through the two first vias, further ensuring that the connecting plate 201 is arranged vertically. It is understood that the horizontal positions of the two first vias are approximately the same. The first extension portion 502 and the second extension portion 503 are both provided with second through holes, and the magnetic scale 101 passes through the two second through holes to further prevent the magnetic scale 101 from shaking in the horizontal direction. It can be understood that the horizontal positions of the two second through holes are approximately the same.

[0039] The connecting plate 201 is connected to the magnetic scale 101. In some examples, a steel wire rope 204 is provided on the connecting plate 201. One end of the steel wire rope 204 is connected to the connecting plate 201, and the other end of the steel wire rope 204 is connected to the magnetic scale 101. In other words, the connecting plate 201 and the magnetic scale 101 are connected via the steel wire rope 204. The steel wire rope 204 is relatively strong, ensuring the strength of the connection between the connecting plate 201 and the magnetic scale 101. When the magnetic scale 101 breaks, the steel wire rope 204 gradually tightens as the magnetic scale 101 falls. The magnetic scale 101 and the counterweight 102 transfer gravity to the steel wire rope 204, causing the steel wire rope 204 to exert a pulling force on the connecting plate 201. When the pulling force reaches the breaking strength of the anti-accidental touch barrier 203, the anti-accidental touch barrier shears, causing the connecting plate 201 to slide off the fixed platform, activating the broken belt trigger mechanism.

[0040] In some examples, to ensure the connection strength between the connecting plate 201 and the steel wire rope 204 , a connecting bolt 205 is provided at the bottom of the connecting plate 201 , and the steel wire rope 204 is fixed to the bottom of the connecting plate 201 through the connecting bolt 205 .

[0041] like Figures 1 to 2 As shown, the tape break trigger structure is used to press the detection switch 202 when the magnetic scale 101 breaks. In the first embodiment, the tape break trigger structure includes a spring 301 and a spring bracket 302. The spring bracket 302 is arranged on a fixed platform. The first end of the spring 301 is horizontally connected to the spring bracket 302, and the second end of the spring 301 abuts the first side of the connecting plate 201. That is, when the connecting plate 201 is on the fixed platform, the spring 301 is located between the connecting plate 201 and the spring bracket 302. At this time, the spring 301 is in a compressed state, storing elastic potential energy, which can be released when the magnetic scale 101 breaks.

[0042] Furthermore, the operating end of the detection switch 202 abuts the second side of the connecting plate 201. When the magnetic scale 101 breaks, the connecting plate 201 and the magnetic scale 101 are separated from the fixed platform. The second end of the spring 301 is no longer restrained, and the spring 301 extends, converting its elastic potential energy into pressure on the detection switch 202, thereby activating the detection switch 202. To facilitate triggering the detection switch 202, the detection switch 202 is positioned horizontally, with the operating end of the detection switch 202 aligned with the second end of the spring 301.

[0043] Specifically, the broken belt trigger structure also includes a spring push rod 303 and a sleeve 304. A mounting hole is provided in the middle of the spring bracket 302. The first end of the spring push rod 303 passes through the mounting hole, and the second end of the spring push rod 303 is connected to the second end of the spring 301. The spring push rod 303 has a certain length and always remains in the mounting hole. When the length of the spring 301 changes, the spring push rod 303 slides within the mounting hole, keeping the spring 301 in a horizontal state, limiting the movement path of the second end of the spring 301 and ensuring that the second end of the spring 301 can accurately trigger the detection switch 202. The second end of the spring push rod 303 is provided with a pressing plate. The pressing plate protrudes from the side wall of the spring push rod 303 and is connected to the second end of the spring 301. The pressing plate replaces the second end of the spring 301 in contact with the detection switch 202, increasing the contact area and ensuring smooth triggering of the detection switch 202. It is understandable that when the magnetic scale 101 works normally, the connecting plate 201 is on the fixed platform, and at this time, the extrusion plate abuts against the first side of the connecting plate 201 .

[0044] In order to further limit the travel path of the spring 301 and ensure that the spring 301 can accurately trigger the detection switch 202, the sleeve 304 is arranged on the spring bracket 302, the spring 301 and the extrusion plate are inside the sleeve 304, and the extrusion plate is slidably connected to the inner wall of the sleeve 304. In order to ensure that the connecting plate 201 can limit the elastic deformation of the spring 301, a notch is provided on the side wall of the sleeve 304, and the top edge of the connecting plate 201 can pass through the notch to reach the interior of the sleeve 304. It can be understood that the operating end of the detection switch 202 also extends into the sleeve to facilitate triggering.

[0045] like Figures 3 and 4As shown, in the second embodiment, the belt break trigger structure includes a blocking lever 401, a locking plate 402, and a touch plate 403. The touch plate 403 is disposed on the connecting plate 201, and the middle portion of the touch plate 403 is hinged to the connecting plate 201. When the connecting plate 201 is connected to the fixed platform, the first end of the touch plate 403 abuts the detection switch 202 without applying a pressure sufficient to trigger the detection switch 202. The locking plate 402 is provided with a hollow portion, and the second end of the touch plate 403 is provided with a hinge shaft, which is located within the hollow portion. The locking plate 402 and the touch plate 403 are rotatably connected. The blocking lever 401 is disposed on the fixed platform and is located below the locking plate 402. As the connecting plate 201 slides downward, the lock plate 402, the touch plate 403, and the connecting plate 201 form a triangular structure. At this point, the lock plate 402 and the touch plate 403 cannot rotate relative to each other. As the touch plate 403 falls, the force exerted on the detection switch 202 by the detection plate 403 gradually increases, thereby triggering the detection switch 202. When the lock plate 402 contacts the blocking rod 401, the triangular structure is broken, allowing the lock plate 402 to rotate. Simultaneously, the hinge slides within the hollow portion, allowing the touch plate 403 to rotate as well, preventing the lock plate 402 and the touch plate 403 from obstructing the connection plate 201 from falling.

[0046] like Figure 5 As shown, in some examples, the hollow portion includes a sliding unit 404 and a locking unit 405. The sliding unit 404 is connected to the locking unit 405. When the connecting plate 201 is connected to the fixed platform, the hinge is located within the locking unit 405, and the locking plate 402, the touch plate 403, and the connecting plate 201 maintain a triangular structure. When the connecting plate 201 falls on the fixed platform, the locking plate 402 rotates slightly under the action of the blocking rod 401, allowing the hinge to enter the sliding unit 404. As the blocking rod 401 continues to push the locking plate 402, the hinge slides and rotates within the sliding unit 404, and the locking plate 402 and the touch plate 403 move to approximately collinearity, preventing the locking plate 402 or the touch plate 403 from interfering with the edge of the first via during the falling process of the connecting plate 201. It is understood that the sliding unit 404 is straight, and the locking unit 405 is near the first end of the locking plate 402, and the sliding unit 404 and the locking unit 405 are angled.

[0047] Throughout this specification, references to "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" refer to specific features, structures, materials, or characteristics described in conjunction with the embodiment or example in at least one embodiment or example of the present invention. In this specification, the illustrative use of these terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A magnetic scale broken belt detection device, characterized in that: include: A fixed platform is arranged horizontally and is capable of being slidably connected to the magnetic scale. When the magnetic scale breaks, part of the magnetic scale falls off the fixed platform. The broken belt detection component includes a connecting plate, a broken belt trigger structure, and a detection switch. The connecting plate is vertically arranged, and a first through-hole is provided on the fixed platform. The connecting plate passes through the first through-hole, and the connecting plate is slidably connected to the fixed platform. An anti-accidental touch barrier rod is provided on the connecting plate, and the anti-accidental touch barrier rod is clamped on the edge of the first through-hole. The connecting plate can be connected to the magnetic scale, and the connecting plate is connected to the broken belt trigger structure. When the magnetic scale is broken, the anti-accidental touch barrier rod is cut off, and the magnetic scale drives the connecting plate to fall off from the fixed platform, so that the broken belt trigger structure presses the detection switch. The broken belt trigger structure includes a spring and a spring bracket. The spring bracket is arranged on the fixed platform, and the first end of the spring is horizontally connected to the spring bracket. The second end of the spring abuts the first side of the connecting plate, the detection switch is horizontally arranged, and the operating end of the detection switch abuts the second side of the connecting plate. The broken belt trigger structure also includes a spring push rod and a sleeve. The middle part of the spring bracket is provided with a mounting hole, the first end of the spring push rod passes through the mounting hole, and the second end of the spring push rod is provided with an extrusion plate, the extrusion plate is connected to the second end of the spring, and the extrusion plate abuts the first side of the connecting plate, the sleeve is connected to the spring bracket, the spring is inside the sleeve, the extrusion plate is slidably connected to the sleeve, and a notch is provided on the side wall of the sleeve, the top edge of the connecting plate can pass through the notch and is inside the sleeve, and the operating end of the detection switch extends into the sleeve.

2. A magnetic scale broken belt detection device, characterized in that: include: A fixed platform is arranged horizontally and is capable of being slidably connected to the magnetic scale. When the magnetic scale breaks, part of the magnetic scale falls off the fixed platform. The broken belt detection component includes a connecting plate, a broken belt trigger structure, and a detection switch, the connecting plate is vertically arranged, the fixed platform is provided with a first through-hole, the connecting plate passes through the first through-hole, the connecting plate is slidably connected to the fixed platform, and an anti-accidental touch barrier rod is provided on the connecting plate, the anti-accidental touch barrier rod is clamped on the edge of the first through-hole, the connecting plate can be connected to the magnetic scale, and the connecting plate is connected to the broken belt trigger structure. When the magnetic scale is broken, the anti-accidental touch barrier rod is cut off, and the magnetic scale drives the connecting plate to fall off from the fixed platform, so that the broken belt trigger structure presses the detection switch, and the broken belt trigger structure includes a barrier rod, a lock plate, and a touch plate, the touch plate is arranged on the connecting plate, the middle part of the touch plate is hinged to the connecting plate, and the first end of the touch plate abuts against the detection switch. The locking mechanism is configured to move the locking mechanism downwardly and to move the locking mechanism downwardly when the locking mechanism is in a locked position. The locking mechanism is configured to move the locking mechanism downwardly and to move the locking mechanism downwardly when the locking mechanism is in a locked position.

3. The magnetic scale broken tape detection device according to claim 1 or 2, characterized in that: The fixing platform includes a vertical portion, a first extension portion, and a second extension portion. The first extension portion is located at the top edge of the vertical portion and is angled to the vertical portion. The second extension portion is located at the bottom edge of the vertical portion and is angled to the vertical portion. Both the first extension portion and the second extension portion are provided with a first through hole.

4. The magnetic scale break detection device according to claim 1 or 2, characterized in that: The fixed platform is provided with a second through hole, the magnetic scale can pass through the second through hole, the magnetic scale can be slidably connected to the fixed platform, and when the magnetic scale breaks, the magnetic scale slides along the second through hole.

5. The magnetic scale broken tape detection device according to claim 1 or 2, characterized in that: The magnetic scale break detection device further includes a counterweight block, which can be connected to the bottom end of the magnetic scale via a fastener.

6. The magnetic scale break detection device according to claim 1 or 2, characterized in that: A steel wire rope is provided on the connecting plate, and the steel wire rope can be connected to the bottom end of the magnetic scale through a fastener.

7. The magnetic scale break detection device according to claim 6, characterized in that: The bottom of the connecting plate is provided with connecting bolts, and the steel wire rope is fixed to the bottom of the connecting plate through the connecting bolts.

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