Escalator floor opening protection device
By introducing protective devices for the base, swing arm, buffer rod assembly, and limit assembly into the escalator, the problem of short working stroke of the limit switch is solved, thereby improving the safety and stability of the escalator and reducing maintenance difficulty and cost.
Patent Information
- Application Number
- CN202521605864.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-29
AI Technical Summary
The current limit switches of escalators have short working strokes, which makes installation and maintenance difficult, easy to damage and frequent malfunctions, affecting equipment reliability and maintenance costs.
The device employs a protective mechanism that includes a base, a swing arm, a buffer rod assembly, a pretensioner, and a limit assembly. The rotatable swing arm works in conjunction with a trigger switch, along with the buffer rod assembly and the limit assembly, to prevent malfunctions and damage.
It improves the reliability and installation and maintenance efficiency of escalator floor opening protection, reduces device wear, ensures safety and stability, and lowers maintenance costs.
Smart Images
Figure CN224677592U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of floor slab opening detection technology, and in particular to an escalator floor slab opening protection device. Background Technology
[0002] During the use of escalators, the safety of the floor slabs is paramount. A key safety requirement is preventing accidental opening of escalator floor slabs, which could lead to falls or equipment damage. Currently, the escalator industry commonly uses limit switches to implement floor slab opening protection. However, existing limit switches have a significant problem with short working stroke.
[0003] In actual installation and maintenance, these short-stroke limit switches present significant adjustment difficulties for on-site installation and maintenance personnel. Because precise adjustment of the contact position between the limit switch and the floor slab is required, installation and maintenance personnel need to spend considerable time and effort on debugging. Moreover, improper adjustment can lead to a series of serious problems. On the one hand, the limit switch is susceptible to damage from external impacts, increasing equipment replacement costs; on the other hand, the limit switch may malfunction, causing frequent escalator stoppages, affecting passenger travel, increasing maintenance costs, and reducing equipment reliability. Utility Model Content
[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide an escalator floor opening protection device, which has the advantages of effectively preventing damage to the protection device or malfunction of the trigger switch by using a buffer top rod assembly, thereby improving the reliability of escalator floor opening protection and installation and maintenance efficiency.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0006] An escalator floor slab opening protection device, comprising:
[0007] A base, on which a trigger switch is provided;
[0008] A swing arm is rotatably mounted on the base via a rotating shaft. The swing arm is provided with a trigger part, the position of which corresponds to the position of the trigger switch.
[0009] A buffer push rod assembly is disposed on the swing arm;
[0010] Pre-tensioning components are connected to the swing arm and the base, respectively.
[0011] A limiting component is disposed on the base and is used to limit the position of the swing arm.
[0012] Compared to existing technologies, this application, by installing a trigger switch on the base, utilizes a rotatable swing arm and its triggering part in conjunction with the trigger switch. When the floor panel opens or closes, the swing arm rotates, causing the triggering part to act on the trigger switch, allowing for timely detection of the floor panel status. The buffer rod assembly buffers the impact force of the floor panel on the device, reducing wear and damage and extending its service life. The preload provides preload force to the swing arm, ensuring its stable position under normal conditions and preventing accidental triggering of the switch due to shaking. The limit assembly restricts the position of the swing arm, preventing excessive rotation and ensuring the device operates within a safe and reliable range, thus improving the safety and stability of the escalator floor panel opening protection.
[0013] As a preferred embodiment of this utility model, the buffer push rod assembly includes:
[0014] The top rod body passes through the swing arm. One end of the top rod body is provided with a round head nut, and the other end is provided with a limit nut. The round head nut is used to contact the bottom wall of the floor slab.
[0015] A buffer is provided between the round-head nut and the swing arm, and the buffer is connected to both the round-head nut and the swing arm.
[0016] By adopting the above solution, a round-head nut is set at one end of the top rod body to contact the bottom wall of the floor slab, which can effectively avoid scratching the floor slab; the setting of the limit nut can prevent the top rod body from falling off the swing arm and ensure the structural stability of the buffer top rod assembly; a buffer is set between the round-head nut and the swing arm, which can absorb part of the energy when the floor slab closes and generates impact force, further reducing the impact on the device and improving the impact resistance of the device.
[0017] As a preferred embodiment of this utility model, the buffer includes a compression spring, which is sleeved on the top rod body. One end of the compression spring abuts against the round-headed nut, and the other end abuts against the swing arm.
[0018] The above-mentioned scheme uses a compression spring as a buffer, which can take advantage of its simple and compact structure and convenient installation. When the floor slab is closed and pressure is applied, the compression spring is compressed and absorbs energy through its elastic deformation, thus playing a buffering role. When the pressure is removed, the compression spring can quickly return to its original shape, so that the device returns to its initial state, ensuring the reusability and reliability of the device.
[0019] As a preferred embodiment of this utility model, the minimum deformation force of the buffer is greater than the maximum working force of the pretensioner.
[0020] By employing the above-mentioned scheme, the minimum deformation force of the buffer component is greater than the maximum working force of the pretensioner. This design ensures that during the floor slab's downward pressure, the pretensioner deforms first, causing the swing arm to oscillate. Only after the swing arm reaches its limit position under the constraint of the limiting component will the downward pressure generated by the floor slab further cause the buffer component to deform. This sequential design allows the buffering function to operate in stages and in an orderly manner, preventing damage to the swing arm caused by continued floor slab pressure after the swing arm has reached its limit position. Furthermore, when the floor slab opens slightly or shakes slightly, the buffer component ensures that the swing arm remains stable without oscillating, effectively preventing accidental switch triggering due to swing arm instability and significantly improving the reliability and stability of the protection device.
[0021] As a preferred embodiment of the present invention, the limiting component includes a first limiting post and a second limiting post, both of which are detachably mounted on the base, and the swing arm is located between the first limiting post and the second limiting post.
[0022] Using the above solution, the first and second limit posts can provide positional restrictions on the swing arm, ensuring that the swing range of the swing arm is controllable; secondly, both the first and second limit posts are connected to the base through a detachable connection method, which is beneficial for the maintenance and replacement of the first and second limit posts.
[0023] As a preferred embodiment of this utility model, the trigger switch is a limit switch, and the contact position of the limit switch corresponds to the position of the trigger part.
[0024] By adopting the above scheme, when the swing arm rotates to a specific position, the trigger can accurately act on the contact of the limit switch, so that the limit switch can act quickly and send a signal for the floor to open or close in a timely manner. This makes it easier for the escalator control system to perform corresponding operations according to the signal, thereby improving the safety and automation of the escalator.
[0025] As a preferred embodiment of this utility model, the pretensioning member includes a tension spring, one end of which is connected to the swing arm and the other end of which is connected to the base.
[0026] Using the above solution, the tension spring can provide stable tension, keeping the swing arm in a certain position under normal conditions, preventing the swing arm from rotating randomly due to gravity or other external forces, and ensuring the initial stability of the device.
[0027] The aforementioned escalator floor slab opening protection device has the following beneficial effects: Firstly, the buffer top rod assembly effectively prevents damage to the swing arm or limit assembly caused by continuous downward pressure of the floor slab. Secondly, by designing the minimum deformation force of the buffer component to be greater than the maximum working force of the pre-tensioning component, the pre-tensioning component provides a stable pre-tensioning force to the swing arm to achieve its reset function. The buffer component provides buffer space when the swing arm is at its extreme position, preventing further downward pressure of the floor slab from damaging the swing arm or limit assembly, thus effectively improving the reliability and stability of the protection device. Attached Figure Description
[0028] Figure 1 This is a structural schematic diagram of an escalator floor opening protection device according to the present invention;
[0029] Figure 2 This is a schematic diagram of the locking nut in an escalator floor opening protection device according to the present invention;
[0030] Figure 3 This is an installation diagram of an escalator floor panel opening protection device according to the present invention;
[0031] In the diagram: 1. Base; 2. Trigger switch; 3. Swing arm; 31. Trigger part; 32. Mounting part; 33. Rotary shaft screw; 34. Washer; 35. Locking nut; 4. Buffer rod assembly; 41. Rod body; 42. Round head nut; 43. Limit nut; 44. Buffer component; 5. Preload component; 6. Limit assembly; 61. First limit post; 62. Second limit post; 7. Floor slab.
[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0036] This utility model proposes a protective device for the opening of escalator floor panels.
[0037] Reference Figures 1 to 3In one embodiment of this utility model, an escalator floor opening protection device includes: a base 1, a swing arm 3, a buffer rod assembly 4, a pre-tightening member 5, and a limiting assembly 6. A trigger switch 2 is installed on the base 1 by screws. In this embodiment, a limiting switch is used as the trigger switch 2. The swing arm 3 is rotatably mounted on the base 1 via a rotating shaft. The swing arm 3 is provided with a trigger part 31, which is a bent part of the swing arm 3. The position of the trigger part 31 corresponds to the position of the trigger switch 2. In this embodiment, the swing arm 3 is rotatably mounted on the base 1 by a rotating shaft screw 33, a washer 34, and a locking nut 35. The contact position of the limiting switch corresponds to the position of the trigger part 31. The buffer rod assembly 4 is located at one end of the swing arm 3, and the pre-tightening member 5 is located at the other end of the swing arm 3 and is connected to the swing arm 3 and the base 1 respectively. The limiting assembly 6 is located on the base 1 and is used to limit the position of the swing arm 3. By setting a trigger switch 2 on the base 1, and utilizing the rotatable swing arm 3 and its trigger part 31 in cooperation with the trigger switch 2, when the floor panel 7 opens or closes, the swing arm 3 rotates, causing the trigger part 31 to act on the trigger switch 2, thus promptly sensing the status of the floor panel 7. The buffer rod assembly 4 buffers the impact force of the floor panel 7 on the device, reducing wear and damage and extending its service life. The pre-tensioning member 5 provides pre-tension force to the swing arm 3, ensuring the stability of the swing arm 3 in normal conditions and preventing accidental triggering of the trigger switch 2 due to shaking. The limit assembly 6 limits the position of the swing arm 3, preventing the swing arm 3 from rotating too much and ensuring that the device operates within a safe and reliable range, improving the safety and stability of the escalator floor panel 7 opening protection; secondly, when the swing arm 3 rotates to a specific position, the trigger part 31 can accurately act on the contact of the limit switch, causing the limit switch to act quickly and promptly send a signal indicating whether the floor panel 7 is open or closed, facilitating the escalator control system to perform corresponding operations based on the signal, thus improving the safety and automation level of the escalator.
[0038] Reference Figures 1 to 3In one embodiment, the limiting component 6 includes a first limiting post 61 and a second limiting post 62, both of which are detachably mounted on the base 1. The swing arm 3 is located between the first limiting post 61 and the second limiting post 62. In this embodiment, both the first limiting post 61 and the second limiting post 62 are screws and are threadedly mounted on the base 1. The swing arm 3 is located between the first limiting post 61 and the second limiting post 62. When the buffer pin assembly is not subjected to external force (e.g., downward pressure from the floor slab 7), the swing arm 3, under the action of the preload 5... When the first limit post 61 contacts the second limit post 62, the trigger part 31 on the swing arm 3 contacts the trigger point of the limit switch. When the buffer pin assembly is subjected to external force (such as the downward pressure from the floor slab 7 mentioned above), the preload 5 deforms under the action of the external force. The position of the swing arm 3 is between the first limit post 61 and the second limit post 62, but it does not contact the second limit post 62. It is worth noting that when the external force is large enough, the swing arm 3 will contact the first limit post 61. At this time, the trigger part 31 on the swing arm 3 separates from the trigger point of the trigger switch 2, and the trigger switch 2 will not be triggered. The first limit post 61 and the second limit post 62 can provide position restriction for the swing arm 3, ensuring that the swing range of the swing arm 3 is controllable. Secondly, the first limit post 61 and the second limit post 62 are both connected to the base 1 by a detachable connection, which is conducive to the maintenance and replacement of the first limit post 61 and the second limit post 62.
[0039] Reference Figures 1 to 3In one embodiment, the buffer push rod assembly 4 includes a push rod body 41 and a buffer member 44. The push rod body 41 passes through the swing arm 3. In this embodiment, the push rod body 41 has a mounting portion 32 through which the push rod body 41 passes. The mounting portion 32 is a bent part of the push rod body 41 and is located at the end of the swing arm 3 away from the preload member 5. A round-head nut 42 is installed at one end of the push rod body 41 and is threaded onto the push rod body 41. Two limiting nuts 43 are threaded onto the other end. The cap 42 is used to contact the bottom wall of the floor slab 7; the buffer 44 is disposed between the round-head nut 42 and the swing arm 3. The buffer 44 is connected to the round-head nut 42 and the swing arm 3 respectively. In this embodiment, the buffer 44 is a compression spring. The compression spring is sleeved on the top rod body 41. One end of the compression spring abuts against the round-head nut 42, and the other end abuts against the swing arm 3; the preload 5 is a tension spring. One end of the tension spring is hooked on the swing arm 3, and the other end is hooked on the base 1. In order to better achieve the buffering purpose, the minimum deformation force of the compression spring is greater than the maximum working force of the tension spring. By setting a round-head nut 42 at one end of the top rod body 41 to contact the bottom wall of the floor slab 7, the problem of scratching the floor slab 7 can be effectively avoided. The setting of the limit nut 43 can prevent the top rod body 41 from falling off the swing arm 3, ensuring the structural stability of the buffer top rod assembly 4. A buffer 44 is set between the round-head nut 42 and the swing arm 3. When the floor slab 7 closes and generates impact force, the buffer 44 can absorb part of the energy through deformation, further reducing the impact on the device and improving the impact resistance of the device. Using a compression spring as the buffer 44 can take advantage of its simple and compact structure and convenient installation. When the floor slab 7 closes and pressure is applied, the compression spring is compressed and absorbs energy through its elastic deformation, playing a buffering role. When the pressure is removed, the compression spring can quickly return to its original shape, allowing the device to return to its initial state, ensuring the reusability and reliability of the device. The tension spring can provide stable tension, keeping the swing arm 3 in a certain position under normal conditions, preventing the swing arm 3 from rotating randomly due to gravity or other external forces, and ensuring the initial stability of the device. By ensuring that the minimum deformation force of the compression spring is greater than the maximum working force of the tension spring, this design allows the tension spring to deform first during the downward pressure of the floor slab 7, causing the swing arm 3 to swing. Only after the swing arm 3 is at its limit position under the constraint of the limiting component 6 will the downward pressure generated by the continued downward pressure of the floor slab 7 cause the compression spring to deform. This sequential design allows the buffering function to operate in stages and in an orderly manner, preventing damage to the swing arm caused by the floor slab 7 continuing to press down after the swing arm has reached its limit position. Secondly, when the floor slab 7 is slightly opened or slightly shaken, the compression spring ensures that the swing arm 3 remains stable without swinging, effectively preventing accidental triggering of the switch 2 due to the instability of the swing arm 3, and effectively improving the reliability and stability of the protection device.
[0040] The working principle of this utility model is as follows:
[0041] After installing the escalator floor opening protection device of this utility model, refer to... Figure 1 At this time, the swing arm 3, under the tension of the tension spring, will contact the second limit post 62, and the trigger part 31 on the swing arm 3 will contact the trigger point of the trigger switch 2. During the installation of the floor slab 7, the bottom wall of the floor slab 7 will contact the round head nut 42. When the floor slab 7 continues to be lowered to the installation position, refer to... Figure 3 The downward pressure from the floor slab 7 acts on the ejector pin body, causing the swing arm 3 to swing. Since the minimum deformation force of the compression spring is greater than the maximum working force of the tension spring, the compression spring will not deform while the tension spring will continue to deform. The swing arm 3 swings under the downward pressure of the floor slab 7, thus moving away from the second limit post 62. At this time, the trigger part 31 on the swing arm 3 moves away from the trigger point of the trigger switch 2. When the floor slab 7 continues to press down, the swing arm 3 will contact the first limit post 61. At this time, the swing arm 3 is in the limit position. If the floor slab 7 continues to fall, since the swing arm 3 is in the limit position, the swing arm 3 will no longer swing. At this time, the compression spring will deform during the downward pressing of the floor slab 7 to provide a buffering effect, effectively avoiding the problem of the swing arm 3 being damaged or the floor slab 7 tilting due to continuous downward pressure when the swing arm 3 is in the limit position.
[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A protective device for the opening of escalator floor slabs, characterized in that, include: A base, on which a trigger switch is provided; A swing arm is rotatably mounted on the base via a rotating shaft. The swing arm is provided with a trigger part, the position of which corresponds to the position of the trigger switch. A buffer push rod assembly is disposed on the swing arm; Pre-tensioning components are connected to the swing arm and the base, respectively. A limiting component is disposed on the base and is used to limit the position of the swing arm.
2. The escalator floor slab opening protection device according to claim 1, characterized in that: The buffer push rod assembly includes: The top rod body passes through the swing arm. One end of the top rod body is provided with a round head nut, and the other end is provided with a limit nut. The round head nut is used to contact the bottom wall of the floor slab. A buffer is provided between the round-head nut and the swing arm, and the buffer is connected to both the round-head nut and the swing arm.
3. The escalator floor slab opening protection device according to claim 2, characterized in that: The buffer includes a compression spring, which is sleeved on the top rod body. One end of the compression spring abuts against the round-headed nut, and the other end abuts against the swing arm.
4. The escalator floor slab opening protection device according to claim 2, characterized in that: The minimum deformation force of the buffer is greater than the maximum working force of the preload.
5. The escalator floor slab opening protection device according to claim 1, characterized in that: The limiting component includes a first limiting post and a second limiting post, both of which are detachably mounted on the base, and the swing arm is located between the first limiting post and the second limiting post.
6. The escalator floor slab opening protection device according to claim 1, characterized in that: The trigger switch is a limit switch, and the position of the limit switch contact corresponds to the position of the trigger part.
7. The escalator floor slab opening protection device according to claim 1, characterized in that: The pretensioning component includes a tension spring, one end of which is connected to the swing arm and the other end of which is connected to the base.