Emergency braking mechanism of escalator

Abstract

The utility model discloses an emergency braking mechanism of an escalator. The emergency braking mechanism is arranged facing steps of the escalator. The emergency braking mechanism comprises a shell, a connecting shaft, a limiting plate and a pushing assembly. The connecting shaft is arranged on the shell and provided with a central axis extending front and back. The multiple limiting plates are arranged on the connecting shaft at intervals in the front-back direction, rotate around the central axis of the connecting shaft and are provided with braking positions and avoiding positions. At the braking position, each limiting plate is matched with a tooth groove at the corresponding position on the step in an inserting manner; at the avoiding position, each limiting plate is far away from the step; the pushing assembly is arranged on the shell and used for driving the limiting plates to be switched back and forth between the braking position and the avoiding position. When the escalator is braked emergently, the escalator can stop moving in time, secondary injury to personnel is avoided, and the using requirement of the escalator is effectively met.

Description

Technical Field

[0001] This utility model relates to the field of escalator technology, and in particular to an emergency braking mechanism for escalators. Background Technology

[0002] An escalator is a stationary, electrically driven device that transports pedestrians via a conveyor belt. It features a circulating path and is used to move passengers upwards or downwards between different floors of a building. However, accidents can occur while using escalators, such as falls or clothing getting caught in the escalator. Therefore, emergency braking mechanisms need to be designed into escalators to increase safety.

[0003] Existing emergency braking mechanisms typically stop escalators via an emergency stop button. When the button is pressed, it cuts off the escalator's normal circuit and switches to the emergency circuit. The emergency circuit then sends a command to the controller to stop the escalator and activates the safety switch, ensuring the escalator comes to a complete stop. However, in this method, the escalator may continue to move a short distance due to inertia during emergency braking, potentially causing secondary injuries to people who have already fallen or whose clothing has become entangled in the escalator. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to propose an emergency braking mechanism for escalators that can promptly stop the escalator during emergency braking, preventing secondary injuries to personnel and effectively meeting the usage requirements of escalators.

[0005] The technical solution of this utility model is implemented as follows: an emergency braking mechanism for an escalator, the emergency braking mechanism being arranged facing the steps of the escalator; the emergency braking mechanism includes a housing, a connecting shaft, a limiting plate, and a pushing assembly;

[0006] The connecting shaft is disposed on the housing and has a central axis extending in the front and rear directions;

[0007] Several of the aforementioned limiting plates are spaced apart on the connecting shaft in the front-rear direction, and rotate around the central axis of the connecting shaft to have a braking position and a clearance position;

[0008] In the braking position, each limiting plate engages with a corresponding toothed groove on the step; and in the avoidance position, each limiting plate moves away from the step.

[0009] The pushing component is mounted on the housing and is used to drive each limiting plate to switch back and forth between the braking position and the avoidance position.

[0010] Furthermore, the limiting plate has a first side facing away from the steps and a second side facing the steps;

[0011] The propulsion assembly includes a first propulsion mechanism and a second propulsion mechanism arranged independently of each other;

[0012] The first pushing mechanism includes a push plate disposed on a first side of the limiting plate and a first driving device for driving the push plate to move left and right; the push plate has a first pushing position that abuts against the side of the first side of the limiting plate and drives the limiting plate to move toward the braking position, and a first disengaging position that is away from the limiting plate.

[0013] The second pushing mechanism includes a limiting rod disposed on the second side of the limiting plate and a second driving device for driving the limiting rod to move left and right; the limiting rod has a second pushing position that abuts against the side of the second side of the limiting plate and drives the limiting plate to move in the direction of the avoidance position, and a second disengagement position that is away from the limiting plate.

[0014] Furthermore, the first side of the limiting plate is provided with a pressing surface and a guiding slope; the guiding slope has an inclined upper end connected to the end of the pressing surface away from the connecting shaft and an inclined lower end extending from the inclined upper end and away from the push plate; in the first disengagement position, the limiting plate and the guiding slope are in clearance fit.

[0015] Furthermore, the housing is provided with left and right extending sliding grooves; the push plate is slidably connected to the sliding grooves.

[0016] Furthermore, the first driving device includes a screw and a first driver; the screw extends in the left-right direction and is rotatably connected to the housing; the push plate is threadedly connected to the screw; the first driver is disposed on the housing and is used to drive the screw to rotate.

[0017] Furthermore, the limiting plate is made of hard steel.

[0018] Furthermore, the second pushing mechanism includes a connector and a second driver; the connector is connected to a limiting rod; the second driver is disposed on the outer side of the housing and connected to the connector to drive the connector to move left and right.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] 1. This utility model, through the use of a limiting plate, can drive the limiting plate out of the shell and insert it into the tooth groove of the step when the escalator is in emergency braking, so as to restrict the movement of the step, thereby enabling the escalator to stop moving in time, avoiding secondary injury to people. Moreover, the limiting plate can be retracted and reused to facilitate the escalator to run again or stop in an emergency, effectively meeting the usage needs of automatic escalators.

[0021] 2. This utility model, through the combined use of the push plate and the limiting rod, enables the limiting plate to switch back and forth between the braking position and the avoidance position during the movement of the push plate and the limiting rod. The push plate and the limiting rod drive the limiting plate to move by pressing against each other. The push plate and the limiting rod can withstand high impact force. The overall structure is stable and reliable under force, with high durability, effectively meeting the usage requirements of escalators. Attached Figure Description

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;

[0024] Figure 2 for Figure 1 A three-dimensional structural diagram from another perspective;

[0025] Figure 3 for Figure 1 A side view structural diagram;

[0026] Figure 4 for Figure 1 Exploded view;

[0027] Figure 5 for Figure 4 A three-dimensional structural diagram from another perspective;

[0028] The components are: 1. Housing; 2. Connecting shaft; 3. Limiting plate; 31. Pressing surface; 32. Guide slope; 4. Push plate; 41. Screw; 42. First driver; 5. Limiting rod; 51. Connecting piece; 52. Second driver. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] like Figure 1-5The diagram illustrates an emergency braking mechanism for an escalator according to this embodiment. This mechanism is positioned at one or both ends of the escalator, facing the steps. The steps are a standard component of the escalator. The emergency braking mechanism includes a housing 1, a connecting shaft 2, limiting plates 3, and a pushing assembly. The housing 1 is fixed to the escalator's truss and has an open side facing the steps. The connecting shaft 2 is installed inside the housing 1 and has a central axis extending forward and backward. Both ends of the connecting shaft 2 are connected to the housing 1 via bearings, allowing the connecting shaft 2 to rotate around its central axis. The limiting plates 3 are installed inside the housing 1, with several limiting plates 3 spaced apart along one side of the connecting shaft 2. The spacing between the limiting plates 3 corresponds to the toothed grooves on the steps, and the thickness of the limiting plates 3 matches the width of the toothed grooves, allowing the limiting plates 3 to be inserted into the grooves. One end of each limiting plate 3 is fixedly connected to the connecting shaft 2, allowing the limiting plate 3 to rotate around the central axis of the connecting shaft 2, thus having a braking position and a clearance position. The limiting plate 3 moves towards the step to form a braking position. In this braking position, each limiting plate 3 engages with the corresponding toothed groove on the step. The limiting plate 3 then moves away from the step to form a clearance position. In this clearance position, each limiting plate 3 moves away from the step to avoid interfering with the movement of the step.

[0031] The aforementioned pushing assembly is mounted on the housing 1 to drive each limiting plate 3 to switch back and forth between a braking position and a clearance position. Each limiting plate 3 has a first side facing away from the stairs and a second side facing the stairs. The first and second sides are the upper and lower sides of the limiting plate 3. The aforementioned pushing assembly includes a first pushing mechanism and a second pushing mechanism arranged independently of each other.

[0032] The first pushing mechanism is used to drive the limiting plate 3 to move from the avoidance position towards the braking position. Specifically, the first pushing mechanism includes a push plate 4 disposed on the first side of the limiting plate 3 and a first driving device for driving the push plate 4 to move left and right. In this embodiment, the push plate 4 is disposed on the upper side of the limiting plate 3 and extends in the front-rear direction, and has a pressing end facing the limiting plate 3. During the left and right movement of the push plate 4, the push plate 4 has a first pushing position that presses against the side of the first side of the limiting plate 3 and a first disengagement position away from the limiting plate 3. When in the first pushing position, by driving the push plate 4 to move in the left and right direction away from the first disengagement position, the pressing end of the push plate 4 continues to contact the limiting plate 3 so as to drive the limiting plate 3 to move towards the braking position.

[0033] In the specific structural design, an extended groove is machined on the inner wall surface of the housing 1. The push plate 4 is slidably connected to the groove. The aforementioned first driving device includes a screw 41 and a first driver 42. The screw 41 extends in the left-right direction and is rotatably connected to the housing 1 via a bearing. The push plate 4 is threadedly connected to the screw 41. The first driver 42 is a drive motor, fixed to the housing 1, and its driving end is connected to the screw 41 for driving the screw 41 to rotate. When the screw 41 rotates in both directions, it can drive the push plate 4 to move left and right. The aforementioned limiting plate 3 is made of hard steel.

[0034] The aforementioned second pushing mechanism is used to drive the limiting plate 3 to move from the braking position towards the avoidance position. Specifically, the second pushing mechanism includes a limiting rod 5 arranged on the second side of the limiting plate 3 and a second driving device for driving the limiting rod 5 to move left and right. In this embodiment, the limiting rod 5 is located on the lower side of the limiting plate 3 and extends in the front-rear direction. When the limiting rod 5 moves left and right, it has a second pushing position that abuts against the side of the second side of the limiting plate 3, and a second disengagement position away from the limiting plate 3. When in the second pushing position, by driving the limiting rod 5 to move in the left-right direction away from the second disengagement position, the limiting rod 5 continues to contact the limiting plate 3 so as to drive the limiting plate 3 to move towards the avoidance position.

[0035] The aforementioned second pushing mechanism includes a connector 51 and a second actuator 52. The connector 51 is connected to the limiting rod 5. The second actuator 52 is an electric push rod, which is fixed to the outer side of the housing 1 and connected to the connector 51 to drive the connector 51 to move left and right.

[0036] The movements of the first and second pushing mechanisms do not interfere with each other. In the specific structural design, when the push plate 4 moves from the first disengagement position to the first pushing position, the limit rod 5 moves from the second pushing position to the second disengagement position.

[0037] In this embodiment, a pressing surface 31 and a guiding slope 32 are formed on the first side of the aforementioned limiting plate 3. The pressing surface 31 is close to the connection position between the limiting plate 3 and the connecting shaft 2, while the guiding slope 32 is away from the connection position between the limiting plate 3 and the connecting shaft 2. The guiding slope 32 has an inclined upper end connected to the end of the pressing surface 31 away from the connecting shaft 2 and an inclined lower end extending from the inclined upper end and away from the push plate 4. The guiding slope 32 and the pressing surface 31 are smoothly connected. When the push plate 4 is in the first disengagement position, the aforementioned limiting plate 3 and the guiding slope 32 are in clearance fit, so that the end face of the push plate 4 facing the limiting plate 3 is located in the space between the guiding slope 32 and the pressing surface 31. When the push plate 4 is driven away from the first disengagement position, the end face of the push plate 4 facing the limiting plate 3 moves towards the pressing surface 31 so as to form a pressing contact with the pressing surface 31.

[0038] In this embodiment, the actuating component is linked to the emergency stop button of the escalator. When the emergency stop button is pressed, the actuating component starts operating.

[0039] In practical use, when the escalator stops under emergency braking, the first drive unit starts operating, the screw 41 rotates and drives the push plate 4 from the first disengagement position to the first push position. Simultaneously, the second drive unit starts operating, driving the limit rod 5 from the second push position to the second disengagement position. Under the push of the push plate 4, each limit plate 3 moves to the braking position and inserts into the toothed groove of the step to restrict the movement of the step, thus enabling the escalator to stop in time and avoid secondary injury to personnel. When the escalator restarts, the push plate 4 and limit rod 5 are controlled to move back to their original positions. The limit rod 5 pushes the limit plate 3 to the avoidance position, allowing the escalator to run again, facilitating restart or emergency stop, effectively meeting the usage requirements of the escalator. The push plate 4 and limit rod 5 use a pressing contact method to drive the limit plate 3, which can withstand high impact forces. The overall structure is stable and reliable under stress, with high durability, effectively meeting the usage requirements of the escalator.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An emergency braking mechanism for an escalator, the emergency braking mechanism being arranged facing the steps of the escalator; characterized in that: The emergency braking mechanism includes a housing, a connecting shaft, a limiting plate, and a pushing assembly; The connecting shaft is disposed on the housing and has a central axis extending in the front and rear directions; Several of the aforementioned limiting plates are spaced apart on the connecting shaft in the front-rear direction, and rotate around the central axis of the connecting shaft to have a braking position and a clearance position; In the braking position, each limiting plate engages with a corresponding toothed groove on the step; and in the avoidance position, each limiting plate moves away from the step. The pushing component is mounted on the housing and is used to drive each limiting plate to switch back and forth between the braking position and the avoidance position.

2. The emergency braking mechanism for an escalator according to claim 1, characterized in that: The limiting plate has a first side facing away from the steps and a second side facing the steps; The propulsion assembly includes a first propulsion mechanism and a second propulsion mechanism arranged independently of each other; The first pushing mechanism includes a push plate disposed on a first side of the limiting plate and a first driving device for driving the push plate to move left and right; the push plate has a first pushing position that abuts against the side of the first side of the limiting plate and drives the limiting plate to move toward the braking position, and a first disengaging position that is away from the limiting plate. The second pushing mechanism includes a limiting rod disposed on the second side of the limiting plate and a second driving device for driving the limiting rod to move left and right; the limiting rod has a second pushing position that abuts against the side of the second side of the limiting plate and drives the limiting plate to move in the direction of the avoidance position, and a second disengagement position that is away from the limiting plate.

3. The emergency braking mechanism for an escalator according to claim 2, characterized in that: The limiting plate has a pressing surface and a guiding slope on its first side; the guiding slope has an inclined upper end connected to the end of the pressing surface away from the connecting shaft and an inclined lower end extending from the inclined upper end and away from the push plate; in the first disengagement position, the limiting plate and the guiding slope are in clearance fit.

4. The emergency braking mechanism for an escalator according to claim 2, characterized in that: The housing is provided with left and right extending sliding grooves; the push plate is slidably connected to the sliding grooves.

5. The emergency braking mechanism for an escalator according to claim 2, characterized in that: The first driving device includes a screw and a first driver; the screw extends in the left-right direction and is rotatably connected to the housing; the push plate is threadedly connected to the screw; the first driver is disposed on the housing and is used to drive the screw to rotate.

6. The emergency braking mechanism for an escalator according to claim 2, characterized in that: The limiting plate is made of hard steel.

7. The emergency braking mechanism for an escalator according to claim 2, characterized in that: The second pushing mechanism includes a connector and a second driver; the connector is connected to a limiting rod; the second driver is disposed on the outer side of the housing and connected to the connector to drive the connector to move left and right.

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