Escalator main driving structure capable of detecting displacement in real time

Abstract

This utility model discloses a main drive structure for an escalator capable of real-time displacement detection, comprising a main drive shaft and two sets of displacement switches disposed at both ends of the main drive shaft. Each set of displacement switches includes a side displacement switch and a low displacement switch. The side displacement switches are located on both sides of the main drive shaft opposite to the truss, while the low displacement switch is located directly below the main drive shaft. A step sprocket and a roller chain drive wheel are also respectively disposed at both ends of the main drive shaft; the step sprocket is connected to the step chain, and the roller chain drive wheel is connected to the drive unit. A 0.5mm gap is maintained between the contacts of the displacement switches and the outer circumference of the main drive shaft. This escalator main drive structure, by installing side displacement switches and low displacement switches on the outside of the main drive shaft, achieves real-time monitoring of displacement of the main drive shaft in two directions. The solution is simple, low-cost, and easy to implement in environments with limited space, facilitating large-scale promotion and use.

Description

Technical Field

[0001] This utility model relates to the field of escalator manufacturing technology, and in particular to an escalator main drive structure capable of real-time displacement detection. Background Technology

[0002] The main drive structure is the power source for all steps of the escalator during operation. The power of the drive unit is synchronously transmitted to the step chains through the drive shaft and sprocket of the main drive structure, thereby driving the escalator steps. During long-term operation, the escalator's main drive structure may shift due to bearing wear, loose connecting bolts, or other reasons. Even a slight shift can lead to uneven wear of the left and right step chains, step misalignment, and collision with the comb teeth, potentially causing serious safety accidents.

[0003] Currently, the inspection of displacement of the main drive structure mainly relies on periodic manual inspections during maintenance. However, periodic inspections cannot detect displacement faults in real time, posing a risk of delay. There are also a few electrical detection solutions on the market that use vibration sensors for monitoring, but these solutions are complex in structure, expensive, and not conducive to large-scale promotion and use, especially in environments with limited shaft space. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a main drive structure for escalators that can detect displacement in real time, thereby overcoming the deficiencies in existing technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An escalator main drive structure capable of real-time displacement detection includes a main drive shaft and two sets of displacement switches symmetrically arranged at both ends of the main drive shaft. The displacement switches are electrically connected to an external safety circuit board. Both ends of the main drive shaft are rotatably mounted in bearing seats, and the bearing seats are fixed to a truss by fasteners.

[0007] Each set of displacement switches includes a side displacement switch and a low displacement switch. The side displacement switches are located on both sides of the main drive shaft opposite to the truss, and the low displacement switch is located directly below the main drive shaft.

[0008] Furthermore, a ladder sprocket and a roller chain drive wheel are respectively provided at both ends of the main drive shaft; the ladder sprocket is connected to the ladder chain, and the roller chain drive wheel is connected to the drive host.

[0009] Preferably, the installation positions of the side displacement switch and the low displacement switch are equidistant from the end face on the same side of the main drive shaft.

[0010] Preferably, the side displacement switch and the low displacement switch are respectively mounted and fixed on the outer side of the circumferential wall of the main drive shaft by brackets.

[0011] Preferably, a gap of 0.5 mm is maintained between the contacts of the displacement switch and the outer circumferential wall of the main drive shaft.

[0012] Preferably, the displacement switch is a Honeywell ZLDXC03C.

[0013] Preferably, the fastener is a bolt.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The escalator main drive structure in this case, capable of real-time displacement detection, achieves real-time monitoring in two directions when the main drive shaft shifts by installing lateral displacement switches and low-position displacement switches on the outside of the main drive shaft. Compared to manual periodic inspections, this avoids delays and is simpler and less expensive than using vibration sensors. It is particularly easy to implement in environments with limited shaft space, facilitating large-scale deployment.

[0016] To provide a clearer understanding of this invention, the preferred embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the installation diagram of this utility model;

[0019] Figure 3 This is a schematic diagram showing the installation positions of the side displacement switch and the low displacement switch in this utility model;

[0020] Figure 4 yes Figure 3 A magnified view of position A in the middle.

[0021] Attached image labels:

[0022] 1-Main drive shaft, 2-Displacement switch, 3-Bearing housing, 4-Fastener, 5-Truss; 11-Step sprocket, 12-Roller chain drive wheel; 21-Side displacement switch, 22-Low displacement switch. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] Furthermore, if terms such as "first" or "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, components or parts, and should not be construed as indicating or implying relative importance.

[0025] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Please also refer to Figure 1-4 This utility model provides a main drive structure for an escalator that can detect displacement in real time, including a main drive shaft 1 and two sets of displacement switches 2 symmetrically arranged at both ends of the main drive shaft 1. The displacement switches 2 are electrically connected to an external safety circuit board (not shown in the figure). The two ends of the main drive shaft 1 are rotatably installed in bearing seats 3, and the bearing seats 3 are fixed to the truss 5 by fasteners 4.

[0027] Each set of displacement switches 2 includes a side displacement switch 21 and a low displacement switch 22. The side displacement switch 21 and the low displacement switch 22 are respectively installed and fixed on the outer side of the circumferential wall of the main drive shaft 1 by a bracket (not shown). The side displacement switch 21 is located on both sides of the main drive shaft 1 opposite to the truss 5, and the low displacement switch 22 is located directly below the main drive shaft 1.

[0028] Furthermore, the installation positions of the side displacement switch 21 and the low displacement switch 22 are equidistant from the end face on the same side of the main drive shaft 1.

[0029] Furthermore, the main drive shaft 1 is also provided with a step sprocket 11 and a roller chain drive wheel 12 at both ends; the step sprocket 11 is connected to the step chain, and the roller chain drive wheel 12 is connected to the drive host (not shown in the figure), so that the drive host drives the main drive shaft 1 and thus drives the escalator to run.

[0030] Preferably, in this embodiment, the displacement switch 2 is a standard component in the prior art, and the model of displacement switch 2 is Honeywell ZLDXC03C. The working principle of displacement switch 2 is as follows: when an external force presses and pushes the plunger contact at the top of its actuator switch, the internal contact of displacement switch 2 quickly switches from on to off, and automatically converts this physical displacement position information into an electrical signal and sends it to the relevant control system (the safety circuit board of the escalator), which then controls the start and stop of the actuator.

[0031] Preferably, in this embodiment, a gap of 0.5 mm is maintained between the contacts of the displacement switch 2 and the outer circumferential wall of the main drive shaft 1.

[0032] Preferably, in this embodiment, the fastener 4 is a bolt.

[0033] The working principle of the main drive structure of the escalator capable of real-time displacement detection in this case is as follows:

[0034] 1. Since the main drive shaft 1 is installed in the bearing housing 3, and the bearing housing 3 is fixed to the side of the truss 5 by fasteners 4 (i.e. bolts), and since the two ends of the main drive shaft 1 are provided with limiters, the main drive shaft 1 will not be axially displaced. If the bearing housing 3 is worn or the bolts are loose, the main drive shaft 1 may only be displaced in the direction of the side displacement switch 21 and the low displacement switch 22.

[0035] 2. Under normal operating conditions where the main drive shaft 1 does not shift, the contacts of the displacement switch maintain a 0.5mm gap with the main drive shaft 1, and the displacement switch is in a normally closed state. When the main drive shaft 1 shifts towards the side displacement switch 21 or the low displacement switch 22, the contacts of the displacement switch are squeezed, the displacement switch is released from its normally closed state and automatically sends a status abnormality signal to the safety circuit board. When the safety circuit board of the escalator receives the status abnormality signal, it triggers the emergency handling mechanism to automatically start and stop the escalator.

[0036] Compared to existing technologies, this invention presents a real-time displacement detection system for escalator main drives. By installing lateral displacement switches and low-position displacement switches on the outside of the main drive shaft, it achieves real-time monitoring of displacement in both directions. Compared to manual periodic inspections, this avoids delays and is simpler and less costly than using vibration sensors. It is particularly easy to implement in environments with limited shaft space, facilitating large-scale adoption.

[0037] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A main drive structure for an escalator capable of real-time displacement detection, characterized in that: It includes a main drive shaft (1) and two sets of displacement switches (2) symmetrically arranged at both ends of the main drive shaft (1). The displacement switches (2) are electrically connected to an external safety circuit board. The two ends of the main drive shaft (1) are rotatably installed in bearing seats (3). The bearing seats (3) are fixed to the truss (5) by fasteners (4). Each set of displacement switches (2) includes a side displacement switch (21) and a low displacement switch (22). The side displacement switch (21) is located on both sides of the main drive shaft (1) opposite to the truss (5), and the low displacement switch (22) is located directly below the main drive shaft (1).

2. The main drive structure of an escalator capable of real-time displacement detection according to claim 1, characterized in that: The main drive shaft (1) is also provided with a ladder sprocket (11) and a roller chain drive wheel (12) at both ends; the ladder sprocket (11) is connected to the ladder chain, and the roller chain drive wheel (12) is connected to the drive host.

3. The main drive structure of an escalator capable of real-time displacement detection according to claim 2, characterized in that: The installation positions of the side displacement switch (21) and the low displacement switch (22) are equidistant from the end face of the same side of the main drive shaft (1).

4. The main drive structure of an escalator capable of real-time displacement detection according to claim 2, characterized in that: The side displacement switch (21) and the low displacement switch (22) are respectively mounted and fixed on the outer side of the circumferential wall of the main drive shaft (1) by brackets.

5. The main drive structure of an escalator capable of real-time displacement detection according to claim 2, characterized in that: A 0.5mm gap is maintained between the contacts of the displacement switch (2) and the outer circumferential wall of the main drive shaft (1).

6. The main drive structure of an escalator capable of real-time displacement detection according to claim 2, characterized in that: The displacement switch (2) is a Honeywell ZLDXC03C.

7. The main drive structure of an escalator capable of real-time displacement detection according to claim 2, characterized in that: The fastener (4) is a bolt.

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