A fault early warning device for a platform door electromagnetic lock

Abstract

The utility model relates to a kind of for the fault early warning device of platform door electromagnetic lock, and the side of installation shell is installed with relay iron plate, and the side of fixed frame close to installation shell is fixedly installed with fixed iron plate, and the middle end of the side of installation shell top close to fixed frame is vertically fixedly installed with mounting plate, the side of each mounting plate is provided with first buffer mechanism, the side of the two ends of the side of installation shell top away from fixed frame is fixedly installed with support plate, the side of each support plate is provided with second buffer mechanism, and first buffer mechanism and second buffer mechanism outside side are connected by transmission through synchronous mechanism, the utility model can hinder and deceleration process to the moving speed of fixed iron plate, avoid fixed iron plate to be adsorbed and cause moving speed to be too fast to impact to the surface of relay iron plate and cause damage to it, improve the protective property of fixed iron plate and relay iron plate and prolong its service life, and then improve the locking safety of electromagnetic lock whole.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic lock technology, specifically a fault warning device for electromagnetic locks used in platform screen doors. Background Technology

[0002] Electromagnetic locks (or magnetic locks) are designed like electromagnets, utilizing the principle of electromagnetism. When current passes through a silicon steel sheet, the electromagnetic lock generates a strong attraction force that tightly holds the iron plate, achieving the effect of locking the door. Nowadays, they are widely used in subway and public transportation platforms to lock and attract the door, thus blocking and protecting pedestrians.

[0003] In the actual use of platform electromagnetic locks, traditional electromagnetic locks, during the locking process, generate an attractive force while electromagnetically attracting an external fixed iron plate. When the fixed iron plate moves closer to the electromagnet surface, the instantaneous attractive force generated by the electromagnet produces a rapid rotational force. Since the lock body surface lacks a corresponding contact buffer mechanism, the fixed iron plate, during its rotational movement, is easily subjected to direct impact on the electromagnet surface, causing wear and tear on both the fixed iron plate and the electromagnetic lock. Over time, this wear negatively impacts the electromagnetic lock's attractive force, thus reducing the locking reliability and safety of the platform gate. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a fault warning device for electromagnetic locks of platform doors. This addresses the problem that when an electromagnetic lock generates an adsorption force during operation and electromagnetically attracts an external fixed iron plate, the electromagnet's instantaneous adsorption force generates excessively rapid rotational force as the plate moves closer to the electromagnet surface. Since the electromagnetic lock body surface lacks a corresponding contact buffer mechanism, the fixed iron plate, during its rotational adsorption, is easily subjected to direct impact on the electromagnet surface, causing wear on both the fixed iron plate and the electromagnetic lock. Over time, this wear negatively impacts the electromagnetic lock's own adsorption force, thereby reducing the locking reliability and safety of the platform door.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: design a fault warning device for electromagnetic locks of platform doors, including a mounting shell and a fixing frame. A relay plate is installed on the side of the mounting shell, and a fixing plate is fixedly installed on the side of the fixing frame close to the mounting shell.

[0006] Mounting plates are vertically fixed on both sides of the top of the mounting housing near the fixed frame. Each mounting plate is provided with a first buffer mechanism on its side. Support plates are fixedly installed on both ends of the top of the mounting housing away from the fixed frame. Each support plate is provided with a second buffer mechanism on its side. The first buffer mechanism and the second buffer mechanism are connected by a synchronization mechanism.

[0007] Wear detection mechanisms are provided on both sides of the top of the mounting housing.

[0008] Preferably, the first buffer mechanism includes a push plate and a first buffer spring. A movable rod is slidably inserted through the middle of each mounting plate. Push plates are fixedly installed on both sides of the top of the fixed frame. A sliding groove is opened in the middle of each mounting plate, and the movable rod is slidably inserted through the sliding groove. A transmission plate is fixedly installed on the side of each movable rod near the fixed frame. A first buffer spring is movably sleeved on the outside of each movable rod, and the two ends of the side of the first buffer spring are respectively movably attached to the outside of the mounting plate and the transmission plate.

[0009] Preferably, the second buffer mechanism includes a second buffer spring, a fixed rod is fixedly installed at the middle of the side of each support plate, a sliding sleeve is slidably sleeved on the outer surface of each fixed rod, and a second buffer spring is movably sleeved on the outer surface of each fixed rod, with the two ends of the second buffer spring respectively movably attached to the sliding sleeve and the outer side of the support plate.

[0010] Preferably, the synchronization mechanism includes a transmission rod, and a connecting plate is fixedly installed on the side of each movable rod away from the fixed frame. A connecting frame is fixedly installed on the outer side of each connecting plate and the sliding sleeve. A transmission rod is hinged between the sides of every two sets of connecting frames via a rotating shaft.

[0011] Preferably, the wear detection mechanism includes a contact switch and an audible and visual alarm. A contact switch is fixedly installed on the top side of each support plate, and a pressing plate is vertically fixedly installed on the top outer surface of each sliding sleeve, with the pressing plate located outside the contact switch. An audible and visual alarm is fixedly installed on both sides of the top of the mounting housing, and the audible and visual alarm is electrically connected to the contact switch.

[0012] Preferably, each of the fixed rods has a guide slider fixedly installed on both outer sides, and each of the sliding sleeves has a guide groove at both ends on its inner side, with the guide slider slidably inserted into the guide groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model features a movable rod inside the mounting plate at the top of the mounting housing and a guide rod on the surface of the support plate behind it. A sliding sleeve is slidably fitted onto the outside of the guide rod, and the two sides of the push rod are respectively hinged to the sliding sleeve and the connecting plate surface at the rear end of the guide rod via a rotating shaft. This allows the fixed iron plate to move towards the surface of the relay iron plate as the platform door rotates. When the relay iron plate is energized and electromagnetically attracts the fixed iron plate, the fixed iron plate, under the action of the electromagnetic attraction force, moves rapidly towards the outside of the relay iron plate. Simultaneously, this causes the transmission plate at the top of the fixed frame to move towards the outside of the movable rod, thus impacting the movable rod before it is fixed. While the moving rod moves backward, the transmission rod converts the backward movement of the moving rod into a pushing force on the sliding sleeve, allowing the sliding sleeve to move horizontally outside the guide rod. During the synchronous movement of the moving rod and the sliding sleeve, the first and second buffer springs are compressed and deformed simultaneously, hindering and slowing the movement of the fixed iron plate. This prevents the fixed iron plate from being attracted and impacting the surface of the relay iron plate due to excessive speed, thus improving the protection of the fixed iron plate and the relay iron plate and extending their service life, thereby enhancing the overall locking security of the electromagnetic lock.

[0015] 2. This utility model provides a contact switch on the side of the support plate and a pressing plate corresponding to the contact switch on the top of the sliding sleeve. This ensures that when the relay plate and the fixed plate are in normal use and have not yet worn, the distance between the fixed frame and the mounting housing will not shorten when the relay plate is adsorbed onto the fixed plate. The sliding sleeve will not be pushed and will not cause the pressing plate to contact the contact switch, thus preventing the audible and visual alarm from activating. Conversely, if the audible and visual alarm is activated, it will alert maintenance personnel to perform maintenance on the relay plate and the fixed plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a top view sectional structural diagram of the mounting housing of this utility model;

[0018] Figure 3 This is a side sectional view of the fixing rod of this utility model.

[0019] Figure 4 This is a side sectional view of the mounting plate of this utility model.

[0020] Figure 5 This is a schematic diagram of an electromagnetic lock structure in the prior art.

[0021] In the diagram: 1. Mounting housing; 11. Relay plate; 12. Fixing frame; 13. Fixing plate; 14. Transmission plate; 15. Push plate;

[0022] 2. Mounting plate; 21. Movable rod; 22. Transmission rod; 23. First buffer spring; 24. Connecting plate; 25. Support plate; 26. Fixed rod; 27. Sliding sleeve; 28. Connecting frame; 29. ​​Second buffer spring;

[0023] 3. Extrusion plate; 31. Contact switch; 32. Audible and visual alarm;

[0024] 4. Guide slider; 41. Guide groove;

[0025] 5. Sliding groove; 51. Base plate; 52. First limit switch; 53. Second limit switch; 54. Trigger slider; 55. External locking block; 56. Limit switch bracket. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Example 1: A fault warning device for electromagnetic locks on platform screen doors, see [link / reference] Figures 1 to 4 A relay plate 11 is installed on the side of the mounting housing 1. A fixed plate 13 is fixedly installed on the side of the fixed frame 12 near the mounting housing 1. Mounting plates 2 are vertically fixed on both sides of the middle of the top of the mounting housing 1 near the fixed frame 12. Each mounting plate 2 is provided with a first buffer mechanism on its side. Support plates 25 are fixedly installed at both ends of the top of the mounting housing 1 away from the fixed frame 12. Each support plate 25 is provided with a second buffer mechanism on its side. The first buffer mechanism and the second buffer mechanism are connected by a synchronization mechanism. Wear detection mechanisms are provided on both sides of the top of the mounting housing 1. Through the cooperation of the first buffer mechanism and the second buffer mechanism, and during the wear detection process of the wear detection mechanism on the relay plate 11 and the fixed plate 13, the moving speed of the fixed plate 13 can be hindered and slowed down. This prevents the fixed plate 13 from being attracted and moving too fast, causing it to hit the surface of the relay plate 11 and damage it. At the same time, it improves the protection of the fixed plate 13 and the relay plate 11 and extends their service life, thereby improving the overall locking safety of the electromagnetic lock.

[0028] In the prior art, see Figure 5A trigger slider 54 is provided on the front side of the substrate 51, and a corresponding limit switch bracket 56 is provided on the outer side of the substrate 51. A first limit switch 52 and a second limit switch 53 are respectively provided on the outer sides of the limit switch bracket 56. Under the action of the outer locking block 55 located on the outer side of the substrate 51, and under the abutment and locking action of the first limit switch 52 and the second limit switch 53 on the trigger slider 54, the substrate 51 can move towards the limit switch bracket 56 and engage the trigger switch between the first limit switch 52 and the second limit switch 53 to achieve the door body The locking limit is achieved by using the mounting housing 1, which is equivalent to the substrate 51 in the prior art, and the fixing frame 12, which is equivalent to the limit switch bracket 56 in the prior art. When the substrate 51 moves toward the limit switch bracket 56 to lock, the movement speed is too fast, causing the trigger switch and the substrate 51 to collide with the surface of the limit switch bracket 56 and cause damage to it. This improves the protection of the fixing iron plate 13 (substrate 51) and the relay iron plate 11 (first limit switch 52 and second limit switch 53) and extends their service life, thereby improving the overall locking safety of the electromagnetic lock.

[0029] Inside the housing 1, a voltage monitoring module and a current monitoring module can be installed. These modules are connected to a corresponding intelligent control module for signal transmission. The voltage monitoring module continuously samples the power supply voltage of the electromagnet. When the voltage is lower or higher than a preset threshold, an alarm is triggered, thereby achieving undervoltage and overvoltage protection for the electromagnet. The current detection uses a Hall sensor. When the electromagnet's pull-in current exceeds a preset threshold, the intelligent control module analyzes the situation and cuts off the power to the electromagnet. At the same time, a corresponding audible and visual alarm is activated to provide a warning.

[0030] For details, see Figures 1 to 4 The first buffer mechanism includes a push plate 15 and a first buffer spring 23. A movable rod 21 is slidably inserted through the middle of each mounting plate 2. Push plates 15 are fixedly installed on both sides of the top of the fixed frame 12. A sliding groove 5 is opened in the middle of each mounting plate 2, and the movable rod 21 is slidably inserted through the sliding groove 5. A transmission plate 14 is fixedly installed on the side of each movable rod 21 near the fixed frame 12. A first buffer spring 23 is movably sleeved on the outside of each movable rod 21, and the two ends of the side of the first buffer spring 23 are respectively movably attached to the outside of the mounting plate 2 and the transmission plate 14. The first buffer spring 23 is sleeved on the surface of the movable rod 21, so that when the adsorption and locking process is performed, the first buffer spring 23 can be squeezed and deformed, thus initially hindering the movement speed of the external fixed frame 12 and the fixed iron plate 13.

[0031] Further, see Figures 1 to 4The second buffer mechanism includes a second buffer spring 29. A fixed rod 26 is fixedly installed at the middle of the side of each support plate 25. A sliding sleeve 27 is slidably sleeved on the outer surface of each fixed rod 26. A second buffer spring 29 is movably sleeved on the outer surface of each fixed rod 26. The two ends of the side of the second buffer spring 29 are respectively movably attached to the sliding sleeve 27 and the outer side of the support plate 25. Under the structural action of the second buffer spring 29, the sliding sleeve 27 can compress the second buffer spring 29 while moving, causing it to deform and further blocking and buffering the external impact force.

[0032] It is worth noting that, see Figures 1 to 4 The synchronization mechanism includes a transmission rod 22. A connecting plate 24 is fixedly installed on the side of each movable rod 21 away from the fixed frame 12. A connecting frame 28 is fixedly installed on the outside of each connecting plate 24 and the sliding sleeve 27. The transmission rod 22 is hinged between the sides of each pair of connecting frames 28 through a rotating shaft. Under the structural action of the transmission rod 22, the movement of the movable rod 21 can be converted into a horizontal pushing force on the sliding sleeve 27, so that the two sets of sliding sleeves 27 can move horizontally relative to each other on both sides of the top of the mounting housing 1 and compress the second buffer spring 29.

[0033] It is worth noting that, see Figures 1 to 4 The wear detection mechanism includes a contact switch 31 and an audible and visual alarm 32. A contact switch 31 is fixedly installed on the top side of each support plate 25. A pressing plate 3 is vertically fixedly installed on the top surface of the outer side of each sliding sleeve 27, and the pressing plate 3 is located outside the contact switch 31. An audible and visual alarm 32 is fixedly installed on both sides of the top of the mounting housing 1, and the audible and visual alarm 32 is electrically connected to the contact switch 31. Under the structural action of the contact switch 31 and the audible and visual alarm 32, the pressing plate 3 moves and presses the contact switch 31, which can activate the audible and visual alarm 32 to perform fault alarm processing.

[0034] It is worth mentioning that, see Figures 1 to 4 Each fixed rod 26 has a guide slider 4 fixedly installed on both outer sides. Each sliding sleeve 27 has a guide groove 41 at both inner ends. The guide slider 4 is slidably inserted into the guide groove 41. By sliding the guide slider 4 into the guide groove 41, and combined with the guiding sliding action of the guide groove 41 on the guide slider 4, the compression sleeve can only move horizontally on the outside of the fixed rod 26 after being pushed, and will not move laterally, thus ensuring the transmission rationality of the overall buffer mechanism.

[0035] During operation, when the platform door needs to be closed and the door body and frame are electromagnetically locked, pulling the door body causes it to rotate. Simultaneously, the electromagnet inside the mounting housing 1 on the outside of the door frame is activated, causing it to generate magnetic attraction on the surface of the relay plate 11. As the door rotates, it simultaneously drives the side fixing frame 12 and the fixing plate 13 to move towards the outside of the relay plate 11. Before the fixing plate 13 is attracted to the outside of the relay plate 11, the push plate 15 at the top of the fixing frame 12 impacts the transmission plate 14, causing it to drive the movable rod 21 synchronously. The mounting plate 2 slides inside, and during the sliding of the movable rod 21, the first buffer spring 23, which is sleeved on its surface, is compressed and deformed. At the same time, this initially hinders and buffers the movement speed of the fixed iron plate 13. Subsequently, under the transmission conversion action of the transmission rod 22, the backward movement of the movable rod 21 can be converted into a pushing force on the sliding sleeve 27. Combined with the guiding sliding action of the guide slider 4 on the guide groove 41, the sliding sleeve 27 can move horizontally relative to the outside of the guide rod. At the same time, it compresses and deforms the second buffer spring 29, further... The movement speed of the fixed iron plate 13 is buffered, allowing it to be adsorbed onto the outside of the relay iron plate 11 at a relatively slow speed. This prevents the relay iron plate 11 and the fixed iron plate 13 from impacting each other and damaging the locking stability of the platform due to excessive adsorption speed. Furthermore, during long-term use, before wear occurs on the relay iron plate 11 and the fixed iron plate 13, the distance between the fixing frame 12 and the mounting housing 1 will not shorten when the relay iron plate 11 adsorbs and installs the fixed iron plate 13. This also prevents the sliding sleeve 27 from pushing the pressing plate 3 into contact with the contact switch. 31. Consequently, the audible and visual alarm 32 will not be activated to trigger an audible and visual alarm. Instead, after the iron plate 11 and the fixed iron plate 13 have been worn down over a long period of use, and the overall thickness of the iron plate 11 and the fixed iron plate 13 has been reduced due to wear, the distance between the mounting housing 1 and the fixed frame 12 when they are attracted to each other has shortened. While providing buffer protection, the extrusion sleeve is driven to move horizontally across the surface of the fixed rod 26. At this time, the extrusion plate 3 will extrude pressure on the contact switch 31, and the audible and visual alarm 32 will be activated simultaneously to trigger an audible and visual alarm, alerting station personnel and allowing the electromagnetic lock to be inspected and maintained.

[0036] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0037] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A fault warning device for electromagnetic locks on platform screen doors, comprising a mounting housing (1) and a fixing frame (12), characterized in that, A relay plate (11) is installed on the side of the mounting housing (1), and a fixing plate (13) is fixedly installed on the side of the fixing frame (12) near the mounting housing; Mounting plates (2) are vertically fixed on both sides of the top of the mounting housing (1) near the middle of the fixed frame (12). Each mounting plate (2) is provided with a first buffer mechanism on its side. Support plates (25) are fixedly installed on both ends of the top of the mounting housing (1) away from the fixed frame (12). Each support plate (25) is provided with a second buffer mechanism on its side. The first buffer mechanism and the second buffer mechanism are connected by a synchronization mechanism on their outer sides. Wear detection mechanisms are provided on both sides of the top of the mounting housing (1).

2. The fault warning device for electromagnetic locks of platform doors as described in claim 1, characterized in that, The first buffer mechanism includes a push plate (15) and a first buffer spring (23). A movable rod (21) is slidably inserted through the middle of each mounting plate (2). Push plates (15) are fixedly installed on both sides of the top of the fixed frame (12). A sliding groove (5) is opened in the middle of each mounting plate (2), and the movable rod (21) is slidably inserted through the sliding groove (5). A transmission plate (14) is fixedly installed on the side of each movable rod (21) near the fixed frame (12). A first buffer spring (23) is movably sleeved on the outside of each movable rod (21), and the two ends of the side of the first buffer spring (23) are movably attached to the outside of the mounting plate (2) and the transmission plate (14) respectively.

3. The fault warning device for electromagnetic locks of platform doors as described in claim 1, characterized in that, The second buffer mechanism includes a second buffer spring (29). A fixed rod (26) is fixedly installed at the middle of the side of each support plate (25). A sliding sleeve (27) is slidably sleeved on the outer surface of each fixed rod (26). A second buffer spring (29) is movably sleeved on the outer surface of each fixed rod (26). The two ends of the side of the second buffer spring (29) are respectively movably attached to the sliding sleeve (27) and the outer side of the support plate (25).

4. The fault warning device for electromagnetic locks of platform doors as described in claim 2, characterized in that, The synchronization mechanism includes a transmission rod (22), and a connecting plate (24) is fixedly installed on the side of each movable rod (21) away from the fixed frame (12). A connecting frame (28) is fixedly installed on the outside of each connecting plate (24) and the sliding sleeve (27). The transmission rod (22) is hinged between the sides of each pair of connecting frames (28) through a rotating shaft.

5. The fault warning device for electromagnetic locks of platform doors as described in claim 3, characterized in that, The wear detection mechanism includes a contact switch and an audible and visual alarm (32). A contact switch (31) is fixedly installed on the top side of each support plate (25). A pressing plate (3) is vertically fixedly installed on the top outer surface of each sliding sleeve (27), and the pressing plate (3) is located outside the contact switch (31). An audible and visual alarm (32) is fixedly installed on both sides of the top of the mounting housing (1), and the audible and visual alarm (32) and the contact switch (31) are electrically connected.

6. The fault warning device for electromagnetic locks of platform doors as described in claim 3, characterized in that, Each of the fixed rods (26) has a guide slider (4) fixedly installed on both sides of its outer surface. Each of the sliding sleeves (27) has a guide groove (41) at both ends of its inner side, and the guide slider (4) is slidably inserted into the guide groove (41).

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