Control device for facilitating the extension and retraction of a step chain and escalator for teaching

Abstract

The application discloses a control device facilitating the stretching and contraction of a ladder chain and a teaching escalator, belongs to the technical field of escalator detection, and is used for controlling the deviation of a chain wheel disc and a ladder chain of the teaching escalator to touch a stroke switch to realize emergency stop, a limiting hole is formed in a mounting side plate, a mounting bearing is slidingly arranged in the limiting hole, a pushing plate is connected with the outer ring of the mounting bearing, a supporting plate is arranged on the mounting side plate and located beside the limiting hole, a first end of an adjusting piece is used for abutting against the supporting plate after penetrating through a preset threaded hole of the supporting plate, the adjusting piece is twisted to abut against the pushing plate through the first end, and then the mounting bearing, a wheel disc mounting shaft and the chain wheel disc are deviated to touch the stroke switch. The adjusting piece is used for driving the deviation movement of the mounting bearing, the wheel disc mounting shaft, the chain wheel disc and the ladder chain as a whole to touch the stroke switch, simulates the fault of ladder chain fracture, and supplements the function of the teaching equipment.

Description

Technical Field

[0001] This application relates to the field of escalator detection technology, and in particular, to a control device that facilitates the extension and retraction of the step chain. Furthermore, this application also relates to a teaching escalator including the aforementioned control device for facilitating the extension and retraction of the step chain. Background Technology

[0002] The information provided in this section is for the purpose of generally presenting the background of this application. To the extent described in this section, the work of the currently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly considered to be prior art of this application.

[0003] Escalators are fixed, electrically driven devices with circulating steps used to transport passengers upwards or downwards at an incline. They are widely used in public places such as subways, train stations, shopping malls, and hotels. With the continuous improvement of people's living standards, rapid economic development, and ongoing improvements in production and daily life, escalators have become fully integrated into our lives and work. To further enhance escalator safety and the skills of maintenance personnel, while also improving the customer experience, elevator maintenance personnel must be trained and certified before starting work. According to the regulations of relevant departments in my country, elevator operation is classified as special operation, and operators must undergo professional training and pass both theoretical and practical examinations before being issued a "Special Operation Certificate" to be allowed to operate the elevator.

[0004] Elevator maintenance personnel play a crucial role in ensuring the smooth and safe operation of escalators. Therefore, providing them with adequate training to improve their technical skills and troubleshooting abilities is of paramount importance. For example, Chinese patent publication CN216817669U discloses an escalator fault simulation teaching aid that requires no disassembly, has a clear and intuitive structure, making training more intuitive for trainees. It simulates a wide range of fault types, and the fault simulation can be directly activated via a specially designed fault button within the fault box, preventing escalator damage caused by improper operation.

[0005] Please refer to the instruction manual for the existing 100-meter escalator used in teaching. Figure 5The teaching escalator 100 includes steps 200, which are driven by a step chain 400 to rotate cyclically. The step chain 400 is tensioned and wound around a sprocket disc 300, which is mounted on the outer frame of the teaching escalator 100 via a disc mounting shaft 301. In actual escalator testing, there is a test for step chain breakage. When the tensioned step chain breaks, it causes the sprocket disc 300 to shift, triggering a safety limit switch and causing the escalator to stop abruptly. Because the existing teaching escalator 100 is essentially a scaled-down version of an actual escalator, it is difficult to conveniently and intuitively demonstrate a step chain breakage malfunction. This results in a functional deficiency in the teaching process, hindering the improvement of teaching effectiveness and quality.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] In view of at least one of the above technical problems, this application provides a control device for facilitating the extension and retraction of a ladder chain. The device can drive the wheel mounting shaft, sprocket, and ladder chain as a whole to offset movement through a swing rod, thereby triggering a limit switch to simulate a ladder chain breakage fault and supplement the function of the teaching equipment.

[0008] This application also provides a teaching escalator that includes the aforementioned control device for facilitating the extension and retraction of the ladder chain.

[0009] According to one aspect of this application, a control device for facilitating the extension and retraction of a step chain is provided. This device controls the offset of the sprocket and step chain of a teaching escalator to trigger a limit switch for emergency stop. The sprocket is mounted on the outer frame of the teaching escalator via a sprocket mounting shaft, and both ends of the sprocket mounting shaft are connected to the mounting side plates of the escalator's outer frame via mounting bearings. The limit switch is located on the outer frame next to the sprocket mounting shaft. The control device for facilitating the extension and retraction of the step chain includes an adjusting member, a support plate, and a push plate.

[0010] A limiting hole is provided on the mounting side plate. The mounting bearing is slidably set in the limiting hole. The push plate is connected to the outer ring of the mounting bearing. The push plate extends through the limiting hole to the outside of the limiting hole. The support plate is set on the mounting side plate and located next to the limiting hole. The first end of the adjusting member is used to pass through the pre-set screw hole on the support plate and abut against the support plate. The adjusting member is used to be screwed so that its first end abuts against the push support plate, thereby pushing the mounting bearing, the wheel mounting shaft and the sprocket to offset, thereby triggering the limit switch.

[0011] In some embodiments of this application, the first end of the adjusting member is provided with an external thread, and the second end of the adjusting member is provided with a handle.

[0012] In some embodiments of this application, the control device for facilitating the extension and retraction of the ladder chain further includes a second connecting sleeve, which is sleeved on the outer ring of the mounting bearing, and the push plate is connected to the second connecting sleeve.

[0013] In some embodiments of this application, there are two push plates, which are disposed on opposite sides of the mounting bearing. There are also two support plates, which are disposed on opposite sides of the limiting hole. An adjusting member is provided through both support plates.

[0014] In some embodiments of this application, the limiting hole is an elongated structure, and a limiting groove is formed on the side of the limiting hole facing the sprocket. The limiting groove is used to limit and guide the installation of the bearing.

[0015] In some embodiments of this application, the control device for facilitating the extension and retraction of the ladder chain further includes a pull rod and a spring. The pull rod is slidably connected to the outer frame, and the spring connects the pull rod to the wheel mounting shaft. The spring is used to provide an elastic force to pull the pull rod closer to the wheel mounting shaft to prevent the pull rod from touching the limit switch.

[0016] In some embodiments of this application, the control device for facilitating the extension and retraction of the ladder chain also includes a tie rod mounting bracket. The tie rod mounting bracket is installed on the outer frame of the teaching escalator. A strip-shaped mounting groove is provided on the tie rod mounting bracket. The tie rod passes through the strip-shaped mounting groove and is slidably connected to the tie rod mounting bracket. A limit switch is provided on the tie rod mounting bracket and located next to the strip-shaped mounting groove.

[0017] In some embodiments of this application, the first end of the pull rod passes through the strip mounting groove and is located outside the strip mounting groove. A limit block is provided at the first end of the pull rod, which is used to limit the sliding of the pull rod.

[0018] In some embodiments of this application, the control device for facilitating the extension and retraction of the ladder chain further includes a first connecting sleeve, which is sleeved on the wheel mounting shaft, with a first end of the spring connected to the first connecting sleeve and a second end of the spring connected to the pull rod.

[0019] According to another aspect of this application, an escalator for teaching is also provided, which includes the aforementioned control device for facilitating the extension and retraction of the step chain.

[0020] This application has the following beneficial effects:

[0021] This application presents a control device for the extension and retraction of the escalator steps. A push plate is connected to the outer ring of the mounting bearing. The push plate extends through a limiting hole to the outside of the limiting hole. A support plate is installed on the mounting side plate, located next to the limiting hole. An adjusting element is installed through the support plate. When the adjusting element is turned, its first end abuts against the push plate, thereby pushing the mounting bearing, the wheel mounting shaft, and the sprocket to shift, triggering the limit switch and achieving an emergency stop for the teaching escalator. This allows for easy manual simulation of a broken escalator step without physically disconnecting the step chain, significantly reducing the difficulty of teaching demonstrations. It also helps to supplement and improve the functionality of the teaching escalator, enhancing teaching effectiveness and quality.

[0022] The teaching escalator in this application also has the aforementioned beneficial effects. These include a relatively simple overall structure, low manufacturing and maintenance costs, easy operation, and the ability to be directly controlled manually for fault demonstration.

[0023] Of course, any product implementing this application does not necessarily need to achieve all the advantages described above simultaneously. In addition to the purposes, features, and advantages described above, this application also has other purposes, features, and advantages. The application will be further described in detail below with reference to figures. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the spring mounting structure according to a preferred embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the installation of the adjusting member according to a preferred embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the installation structure of the first connecting sleeve according to a preferred embodiment of this application;

[0029] Figure 5 This is a schematic diagram of an existing escalator used in teaching.

[0030] Legend: 100, Escalator for teaching; 200, Step; 300, Sprocket; 301, Sprocket mounting shaft; 302, First connecting sleeve; 400, Step chain; 500, Spring; 600, Pull rod; 700, Limit switch; 800, Pull rod mounting bracket; 801, Strip mounting groove; 900, Mounting bearing; 1000, Mounting side plate; 1001, Limiting hole; 1, Adjusting component; 2, Support plate; 3, Push plate; 4, Second connecting sleeve. Detailed Implementation

[0031] The embodiments of this application are described in detail below with reference to the accompanying drawings; however, this application may be implemented in a variety of different ways as defined and covered below.

[0032] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of this application; Figure 2 This is a schematic diagram of the spring mounting structure according to a preferred embodiment of this application; Figure 3 This is a schematic diagram of the installation of the adjusting member according to a preferred embodiment of this application; Figure 4 This is a schematic diagram of the installation structure of the first connecting sleeve according to a preferred embodiment of this application; Figure 5 This is a schematic diagram of an existing escalator used in teaching.

[0033] A control device for facilitating the extension and retraction of the step chain is provided for controlling the offset of the sprocket disc 300 and the step chain 400 of a teaching escalator 100 to trigger a limit switch 700 for emergency stop. The sprocket disc 300 is mounted on the outer frame of the teaching escalator 100 via a disc mounting shaft 301, and both ends of the disc mounting shaft 301 are connected to the mounting side plate 1000 of the outer frame of the escalator 100 via mounting bearings 900. The limit switch 700 is located on the outer frame and next to the disc mounting shaft 301. The control device for facilitating the extension and retraction of the step chain includes an adjusting member 1, a support plate 2, and a push plate 3.

[0034] A limiting hole 1001 is provided on the mounting side plate 1000. The mounting bearing 900 is slidably disposed in the limiting hole 1001. The push plate 3 is connected to the outer ring of the mounting bearing 900. The push plate 3 extends through the limiting hole 1001 to the outside of the limiting hole 1001. The support plate 2 is disposed on the mounting side plate 1000 and located next to the limiting hole 1001. The first end of the adjusting member 1 is used to pass through the pre-set screw hole on the support plate 2 and abut against the support plate 2. The adjusting member 1 is used to be screwed so that its first end abuts against the push support plate 2, thereby pushing the mounting bearing 900, the wheel mounting shaft 301 and the sprocket 300 to offset, thereby triggering the limit switch 700.

[0035] This application provides a control device for the extension and retraction of the step chain. The push plate 3 is connected to the outer ring of the mounting bearing 900. The push plate 3 extends through the limiting hole 1001 to the outside of the limiting hole 1001. A support plate 2 is provided on the mounting side plate 1000, located next to the limiting hole 1001. An adjusting member 1 is provided through the support plate 2. When the adjusting member 1 is turned, its first end abuts against the push plate 2, thereby pushing the mounting bearing 900, the wheel mounting shaft 301, and the sprocket 300 to shift, thus triggering the limit switch 700 to achieve an emergency stop of the teaching escalator 100. This allows for easy manual simulation of a broken step chain 400 without physically disconnecting the step chain 400, significantly reducing the difficulty of the teaching demonstration. This also helps to supplement and improve the functions of the teaching escalator 100, enhancing the teaching effect and quality.

[0036] Preferably, please refer to Figure 1 and Figure 3 As shown, the first end of the adjusting member 1 is provided with an external thread, and the second end of the adjusting member 1 is provided with a handle.

[0037] It is understandable that by setting a handle at the second end of the adjusting component 1, the adjusting component 1 can be easily turned manually to push the push plate 3, thereby slowly offsetting the mounting bearing 900, the wheel mounting shaft 301 and the sprocket 300, and triggering the limit switch 700 to achieve an emergency stop of the teaching escalator 100.

[0038] Optionally, the adjusting element 1 can be made of bolts or screws, or it can be easily turned with conventional tools.

[0039] Preferably, please refer to Figure 1 As shown, the control device for facilitating the extension and retraction of the ladder chain also includes a second connecting sleeve 4, which is fitted onto the outer ring of the mounting bearing 900, and the push plate 3 is connected to the second connecting sleeve 4.

[0040] Understandably, the push plate 3 can be easily installed on the mounting bearing 900 through the second connecting sleeve 4, which facilitates the disassembly and assembly efficiency of the push plate 3 and is beneficial for the maintenance and replacement of parts such as the push plate 3.

[0041] Preferably, please refer to Figure 1 As shown, there are two push plates 3, which are located on opposite sides of the mounting bearing 900. There are also two support plates 2, which are located on opposite sides of the limiting hole 1001. An adjusting element 1 is provided through each of the two support plates 2.

[0042] It is understandable that by setting adjusting members 1 and pushing plates 3 on both sides of the mounting bearing 900, the adjusting members 1 on both sides can press against the two pushing plates 3 respectively, thereby strengthening the limiting of the mounting bearing 900. When it is necessary to push the mounting bearing 900 to shift, the adjusting members 1 on both sides can be turned in the same direction to shift the mounting bearing 900 to one side.

[0043] Preferably, please refer to Figure 1 and 3 As shown, the limiting hole 1001 has an elongated structure. A limiting groove is provided on the side of the limiting hole 1001 facing the sprocket 300. The limiting groove is used to limit and guide the installation of the bearing 900.

[0044] It is understandable that by designing the limiting hole 1001 as an elongated structure and opening a limiting groove on the side of the limiting hole 1001 facing the sprocket 300, the limiting groove is also an elongated structure. The limiting groove can guide the offset of the mounting bearing 900. With the pushing action of the adjusting component 1 and the push plate 3, the mounting bearing 900 can be slightly offset, thus avoiding large displacement caused by large impacts and damage to other components.

[0045] Preferably, please refer to Figure 2 As shown, the control device for facilitating the extension and retraction of the ladder chain also includes a pull rod 600 and a spring 500. The pull rod 600 is slidably connected to the outer frame, and the spring 500 connects the pull rod 600 to the wheel mounting shaft 301. The spring 500 is used to provide elastic force to pull the pull rod 600 closer to the wheel mounting shaft 301 to prevent the pull rod 600 from touching the limit switch 700.

[0046] Understandably, when the adjusting component 1 pushes the mounting bearing 900 and the wheel mounting shaft 301 to shift, the pull rod 600 will move together and touch the limit switch 700, thereby achieving an emergency stop for the teaching escalator 100. The pull rod 600 and the spring 500 amplify the shifting action of the wheel mounting shaft 301, ensuring that the limit switch 700 is successfully triggered.

[0047] In this preferred embodiment, the control device for facilitating the extension and retraction of the ladder chain also includes a pull rod mounting bracket 800. The pull rod mounting bracket 800 is mounted on the outer frame of the teaching escalator 100. A strip-shaped mounting groove 801 is provided on the pull rod mounting bracket 800. The pull rod 600 passes through the strip-shaped mounting groove 801 and is slidably connected to the pull rod mounting bracket 800. A limit switch 700 is provided on the pull rod mounting bracket 800 and located next to the strip-shaped mounting groove 801.

[0048] Understandably, the tie rod 600 is mounted using the tie rod mounting bracket 800, which also limits its sliding movement. This allows the tie rod 600 to slide smoothly and trigger the limit switch 700 in a timely manner, ensuring a high success rate for fault demonstrations. Furthermore, the limit switch 700 is also mounted using the tie rod mounting bracket 800, facilitating the unified assembly and disassembly of the tie rod 600 and the limit switch 700, thus improving the overall efficiency of disassembly, assembly, and maintenance of the device.

[0049] Preferably, please refer to Figure 1 As shown, the first end of the pull rod 600 passes through the strip mounting groove 801 and is located outside the strip mounting groove 801. A limit block is provided at the first end of the pull rod 600, which is used to limit the sliding of the pull rod 600.

[0050] It is understandable that the pull rod 600 is slidably set in the strip mounting groove 801. The sliding movement of the pull rod 600 can be limited by the limit block to reduce the offset of the pull rod 600 in the strip mounting groove 801.

[0051] It should be noted that a boss can be provided on the side wall of the pull rod 600. The first spring 500 can be connected to the pull rod 600 through the boss. The boss can also work with the limiting block to stably limit the pull rod 600 in the strip mounting groove 801.

[0052] Preferably, please refer to Figure 4 As shown, the control device for facilitating the extension and retraction of the ladder chain also includes a first connecting sleeve 302, which is sleeved on the wheel mounting shaft 301. The first end of the spring 500 is connected to the first connecting sleeve 302, and the second end of the spring 500 is connected to the pull rod 600.

[0053] Understandably, the first connecting sleeve 302 facilitates the installation of the spring 500 and the wheel mounting shaft 301. A pull ring can be provided on the side wall of the first connecting sleeve 302, allowing for easy connection with a pre-set hook at the first end of the spring 500, thus enabling quick assembly and disassembly of the spring 500.

[0054] According to another aspect of this application, an escalator for teaching is also provided, which includes the aforementioned control device for facilitating the extension and retraction of the step chain.

[0055] The teaching escalator 100 of this application also has the aforementioned beneficial effects. These include a relatively simple overall structure, low manufacturing and maintenance costs, very convenient operation, and the ability to be directly controlled manually for fault demonstration.

[0056] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the method and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make various improvements, modifications, or variations without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered as protected by this application.

Claims

1. A control device for facilitating the extension and retraction of a step chain, used to control the offset of the sprocket disc (300) and the step chain (400) of a teaching escalator (100) to trigger a limit switch (700) for emergency stop, wherein the sprocket disc (300) is mounted on the outer frame of the teaching escalator (100) via a disc mounting shaft (301), and both ends of the disc mounting shaft (301) are connected to the mounting side plate (1000) of the outer frame of the escalator (100) via mounting bearings (900), and the limit switch (700) is located on the outer frame and next to the disc mounting shaft (301), characterized in that, The control device for facilitating the extension and retraction of the ladder chain includes an adjusting element (1), a support plate (2), and a push plate (3): A limiting hole (1001) is provided on the mounting side plate (1000). The mounting bearing (900) is slidably disposed in the limiting hole (1001). The push plate (3) is connected to the outer ring of the mounting bearing (900). The push plate (3) extends through the limiting hole (1001) to the outside of the limiting hole (1001). The support plate (2) is disposed on the mounting side plate (1000) and located next to the limiting hole (1001). The first end of the adjusting member (1) is used to pass through the pre-set screw hole on the support plate (2) and abut against the support plate (2). The adjusting member (1) is used to be screwed so that its first end abuts against the push support plate (2), thereby pushing the mounting bearing (900), the wheel mounting shaft (301) and the sprocket (300) to offset, thereby triggering the limit switch (700).

2. The control device for facilitating the extension and retraction of a ladder chain according to claim 1, characterized in that, The first end of the adjusting member (1) is provided with an external thread, and the second end of the adjusting member (1) is provided with a handle.

3. The control device for facilitating the extension and retraction of a ladder chain according to claim 1, characterized in that, The control device for facilitating the extension and retraction of the ladder chain also includes a second connecting sleeve (4), which is fitted on the outer ring of the mounting bearing (900), and the push plate (3) is connected to the second connecting sleeve (4).

4. The control device for facilitating the extension and retraction of a ladder chain according to claim 1, characterized in that, There are two push plates (3), which are located on opposite sides of the mounting bearing (900). There are two support plates (2), which are located on opposite sides of the limiting hole (1001). Adjusting parts (1) are provided through both support plates (2).

5. A control device for facilitating the extension and retraction of a ladder chain according to claim 1 or 4, characterized in that, The limiting hole (1001) is a long strip structure. A limiting groove is opened on the side of the limiting hole (1001) facing the sprocket disc (300). The limiting groove is used to limit and guide the installation of the bearing (900).

6. The control device for facilitating the extension and retraction of a ladder chain according to claim 1, characterized in that, The control device for facilitating the extension and retraction of the ladder chain also includes a pull rod (600) and a spring (500). The pull rod (600) is slidably connected to the outer frame, and the spring (500) connects the pull rod (600) to the wheel mounting shaft (301). The spring (500) is used to provide an elastic force to pull the pull rod (600) closer to the wheel mounting shaft (301) to prevent the pull rod (600) from touching the limit switch (700).

7. The control device for facilitating the extension and retraction of a ladder chain according to claim 6, characterized in that, The control device for facilitating the extension and retraction of the ladder chain also includes a tie rod mounting bracket (800). The tie rod mounting bracket (800) is set on the outer frame of the teaching escalator (100). A strip-shaped mounting groove (801) is provided on the tie rod mounting bracket (800). The tie rod (600) passes through the strip-shaped mounting groove (801) and is slidably connected to the tie rod mounting bracket (800). A limit switch (700) is set on the tie rod mounting bracket (800) and located next to the strip-shaped mounting groove (801).

8. A control device for facilitating the extension and retraction of a ladder chain according to claim 6, characterized in that, The first end of the pull rod (600) passes through the strip mounting groove (801) and is located outside the strip mounting groove (801). The first end of the pull rod (600) is provided with a limit block, which is used to limit the sliding of the pull rod (600).

9. A control device for facilitating the extension and retraction of a ladder chain according to claim 6, characterized in that, The control device for facilitating the extension and retraction of the ladder chain also includes a first connecting sleeve (302), which is sleeved on the wheel mounting shaft (301). The first end of the spring (500) is connected to the first connecting sleeve (302), and the second end of the spring (500) is connected to the pull rod (600).

10. An escalator for teaching purposes, characterized in that, Includes the control device for facilitating the extension and retraction of the ladder chain as described in any one of claims 1-9.

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