Escalator driving device

Abstract

The utility model discloses an escalator driving device which comprises a main driving wheel, a driving chain wheel is fixedly connected to one side of the main driving wheel, a fixing frame is fixedly connected to the inner wall of the driving chain wheel, a rotating shaft is arranged on the inner side of the fixing frame, a torsion spring is arranged on the outer wall of the rotating shaft in a sleeved mode, and a pawl is arranged on the outer wall of the torsion spring. One side of the driving chain wheel is fixedly connected with a fixing plate, the inner side of the fixing plate is rotationally connected with a ratchet wheel, the two sides of the ratchet wheel are provided with a first friction plate and a second friction plate respectively, the first friction plate is fixed to the inner side of the driving chain wheel, one side of the second friction plate is connected with a pressing disc, and a bolt is inserted into one end of the pressing disc. The outer wall of the bolt is sleeved with a shaft sleeve, the outer wall of the shaft sleeve is sleeved with a butterfly-shaped gasket set, a nut is arranged on one side of the butterfly-shaped gasket set, and the pressing disc is fixedly connected with the driving chain wheel. According to the device, the driving chain wheel can be quickly and stably braked, so that the using safety of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of escalator technology, specifically to an escalator drive device. Background Technology

[0002] An escalator is an electrically powered device with continuously moving steps, mainly used to transport people between different floors of a building. It is widely used in public places such as shopping malls, subway stations, and airports, and can efficiently and conveniently transport large numbers of people.

[0003] Currently, the drive system of escalators consists of a combination of parts such as motors, sprockets, and chains. To stop the escalator, the motor must be turned off. However, when the motor is turned off, the sprocket cannot stop quickly and stably, which affects the stability and safety of the escalator and needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide an escalator drive device to solve the problem of escalators not being able to brake quickly and stably as mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an escalator drive device, comprising a main drive wheel, a drive sprocket fixedly connected to one side of the main drive wheel, a fixed plate fixedly connected to one side of the drive sprocket, a ratchet rotatably connected to the inner side of the fixed plate, a first friction plate and a second friction plate respectively provided on both sides of the ratchet, the first friction plate being fixed to the inner side of the drive sprocket, and a pressure plate connected to one side of the second friction plate, the pressure plate being fixedly connected to the drive sprocket.

[0006] Preferably, a bolt is inserted into one end of the clamping plate, and a bushing is fitted on the outer wall of the bolt.

[0007] Preferably, the outer wall of the bushing is fitted with a butterfly washer assembly, and a nut is provided on one side of the butterfly washer assembly.

[0008] Preferably, a fixed frame is fixedly connected to the inner wall of the drive sprocket, a rotating shaft is provided on the inner side of the fixed frame, and a torsion spring is sleeved on the outer wall of the rotating shaft.

[0009] Preferably, the outer wall of the torsion spring is provided with a pawl, the pawl is rotatably connected to the fixed frame, and the pawl is engaged with a ratchet.

[0010] Preferably, the butterfly washer assembly and the nut are located on the outer wall of the drive sprocket, and the nut is threadedly connected to the bolt.

[0011] Preferably, the second friction plate is fixedly connected to the pressure plate, and the pressure plate is slidably connected to the drive sprocket.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) This device can achieve fast and stable braking of the drive sprocket, thereby improving the safety of using this device.

[0014] (2) This device sets a first friction plate on one side of the drive sprocket, with one side of the first friction plate attached to the ratchet, and a pressure plate on the other side of the ratchet. The second friction plate inside the pressure plate is attached to the other side of the ratchet. By adjusting the pressure of the pressure plate, different pressure effects can be applied to the ratchet, thereby achieving different friction forces on the drive sprocket, thus realizing fast and stable braking of the drive sprocket.

[0015] (3) This device connects a bolt to one end of the pressure plate, a bushing is fitted on the outer wall of the bolt, a butterfly washer assembly is fitted on the outer wall of the bushing, and a nut is provided on one side of the butterfly washer assembly and threadedly connected to the bolt. Thus, by adjusting the position of the nut, the position of the pressure plate can be adjusted so that the pressure plate applies different pressures to the ratchet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an escalator drive device according to the present invention;

[0017] Figure 2 This is a side view of the connection between the drive sprocket and ratchet in an escalator drive device according to this utility model;

[0018] Figure 3 This utility model relates to an escalator drive device. Figure 1 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Main drive wheel; 2. Butterfly washer assembly; 3. Nut; 4. Bushing; 5. Bolt; 6. Drive sprocket; 7. Pad; 8. Ratchet; 9. Pressure plate; 10. Fixing plate; 11. Fixing bracket; 12. Torsion spring; 13. First friction plate; 14. Second friction plate. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-3This utility model provides a technical solution: an escalator drive device, including a main drive wheel 1, a drive sprocket 6 fixedly connected to one side of the main drive wheel 1, a fixed frame 11 fixedly connected to the inner wall of the drive sprocket 6, a rotating shaft provided inside the fixed frame 11, and a torsion spring 12 sleeved on the outer wall of the rotating shaft. This structure allows the drive sprocket 6 to drive the chain of the escalator system through the rotation of the main drive wheel 1. A pawl 7 is provided on the outer wall of the torsion spring 12, and the pawl 7 is rotatably connected to the fixed frame 11. The pawl 7 is engaged with a ratchet 8. This structure can limit the movement of the chain of the escalator system through the pawl 7. The ratchet 8 is steered in one direction only, improving safety. A torsion spring 12 keeps the pawl 7 constantly engaged with the ratchet 8. A fixed plate 10 is fixedly connected to one side of the drive sprocket 6, and the ratchet 8 is rotatably connected to the inner side of the fixed plate 10. A first friction plate 13 and a second friction plate 14 are respectively provided on both sides of the ratchet 8. The second friction plate 14 is fixedly connected to the pressure plate 9, which is in a sliding connection with the drive sprocket 6. This structure allows the pressure plate 9 to apply pressure, causing the second friction plate 14 to contact and rub against the surface of the drive sprocket 6. To achieve the effect of slowing down the drive sprocket 6 and bringing it to a quick and stable stop, the first friction plate 13 is fixed inside the drive sprocket 6, and a pressure plate 9 is connected to one side of the second friction plate 14. A bolt 5 is inserted into one end of the pressure plate 9, and a bushing 4 is fitted on the outer wall of the bolt 5. This structure allows the bolt 5 to slide and adjust to a certain position on its outer wall via the bushing 4. The bolt 5 has a special structure, consisting of three parts: left, middle, and right. The outer walls of the left and right parts are threaded, while the middle part is unthreaded, ensuring the sliding of the bushing 4. A butterfly washer group 2 is fitted on the outer wall of the bushing 4. The ring assembly 2 and nut 3 are located on the outer wall of the drive sprocket 6. Nut 3 is threadedly connected to bolt 5. This structure allows the position of the butterfly washer assembly 2 to be adjusted by rotating and adjusting the position of nut 3, thereby adjusting the different pressures of the butterfly washer assembly 2 and the pressure plate 9. Nut 3 is provided on one side of the butterfly washer assembly 2. The butterfly washer assemblies 2 of this structure are stacked in pairs, which can protect the outer wall of the drive sprocket 6. The pressure plate 9 is fixedly connected to the drive sprocket 6. This device can achieve stable and rapid braking of the ratchet 8 and the drive sprocket 6 through the second friction plate 14 and the first friction plate 13.

[0022] Working principle: When using this escalator drive device, the pressure of the clamping plate 9 is first adjusted according to the requirements. During adjustment, the nut 3 is rotated, causing the nut 3 to move on the outer wall of the bolt 5. As the nut 3 moves, it pushes the butterfly washer assembly 2, causing the butterfly washer assembly 2 to fit tightly against the outer wall of the drive sprocket 6. During the pressure application process, the clamping plate 9 at the other end of the bolt 5 moves closer to the surface of the ratchet 8, thereby causing the second friction plate 14 on the inner side of the clamping plate 9 to fit against the ratchet 8 and apply pressure to the ratchet 8. Subsequently, the ratchet 8 moves closer to the first friction plate 13, thereby achieving a braking effect on the drive sprocket 6, which can make the drive sprocket 6 stop rotating smoothly and quickly.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An escalator drive comprising a main drive wheel (1), characterized in that: A drive sprocket (6) is fixedly connected to one side of the main drive wheel (1), and a fixed plate (10) is fixedly connected to one side of the drive sprocket (6). A ratchet (8) is rotatably connected to the inner side of the fixed plate (10). A first friction plate (13) and a second friction plate (14) are respectively provided on both sides of the ratchet (8). The first friction plate (13) is fixed to the inner side of the drive sprocket (6), and a pressure plate (9) is connected to one side of the second friction plate (14). The pressure plate (9) is fixedly connected to the drive sprocket (6).

2. An escalator drive according to claim 1, characterized in that One end of the clamping plate (9) is fitted with a bolt (5), and a bushing (4) is fitted on the outer wall of the bolt (5).

3. An escalator drive as claimed in claim 2, characterized in that: The outer wall of the bushing (4) is fitted with a butterfly washer assembly (2), and a nut (3) is provided on one side of the butterfly washer assembly (2).

4. An escalator drive apparatus according to claim 1, characterized in that: The drive sprocket (6) is fixedly connected to a fixed frame (11) on its inner wall. A rotating shaft is provided on the inner side of the fixed frame (11), and a torsion spring (12) is sleeved on the outer wall of the rotating shaft.

5. An escalator drive as claimed in claim 4, characterized in that: The outer wall of the torsion spring (12) is provided with a pawl (7), the pawl (7) and the fixed frame (11) are rotatably connected, and the pawl (7) is engaged with the ratchet (8).

6. An escalator drive as claimed in claim 3, characterized in that: The butterfly washer assembly (2) and the nut (3) are located on the outer wall of the drive sprocket (6), and the nut (3) is threadedly connected to the bolt (5).

7. An escalator drive apparatus according to claim 1, characterized in that: The second friction plate (14) is fixedly connected to the pressure plate (9), and the pressure plate (9) and the drive sprocket (6) are in a sliding connection.

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