Safe locking device for elevator car

Abstract

The utility model relates to the technical field of elevator car safety locking devices, and solves the problems that the effect of positioning a car by depending on negative pressure is poor, and particularly when passengers are in the car, the overall weight is high, and the car is difficult to position stably by the negative pressure. The elevator car safety locking device comprises an elevator shaft, a car is arranged in the elevator shaft, limiting assemblies are fixedly connected to the inner wall of the elevator shaft in an axial symmetry mode, and monitoring assemblies are arranged on the surfaces of the limiting assemblies; the limiting assembly comprises mounting plates which are fixedly connected to the inner wall of the elevator shaft in an axial symmetry mode, electric hydraulic rods are fixedly connected to the top surfaces of the mounting plates, supporting blocks are fixedly connected to one ends of the electric hydraulic rods, sleeve holes are formed in the top surfaces of the supporting blocks, and infrared probes are connected to the two ends of the interiors of the sleeve holes in a sleeving mode; the monitoring assembly comprises a control panel fixedly connected to the interior of the supporting block, and the surface of the control panel is electrically connected with two pressure sensors.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator car safety locking devices, specifically an elevator car safety locking device. Background Technology

[0002] The elevator car safety locking device disclosed in the authorization announcement number CN222099319U includes an elevator shaft and a car. The car is installed inside the elevator shaft by a sliding connection. Guide rails are fixedly installed on both sides of the elevator shaft. Clamping mechanisms are fixedly installed on both sides of the upper end of the car. The clamping mechanisms are slidably connected to the guide rails. Adsorption components are fixedly installed at the front and rear of the lower end of the car. Each adsorption component includes a fixing block, a hydraulic cylinder and two vacuum suction cups. The fixing block is fixedly installed at the front and rear of the lower end of the car by a fixed connection. The hydraulic cylinder is fixedly embedded inside the fixing block.

[0003] By installing an adsorption assembly at the bottom of the car, multiple vacuum suction cups are located at the four corners of the bottom of the car and adsorb onto the inner wall of the elevator shaft, thereby fixing the bottom of the car and improving the car's support and stability.

[0004] The technical solution in the prior art uses multiple adsorption structures for positioning, but the effect of relying on negative pressure to position the car is poor, especially when there are passengers inside the car, the overall weight is high, and it is difficult to stably position the car with negative pressure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an elevator car safety locking device, which solves the problem that relying on negative pressure to position the car is ineffective, especially when there are passengers inside the car, the overall weight is high, and it is difficult to stably position the car using negative pressure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an elevator car safety locking device, comprising an elevator shaft, wherein a car is disposed inside the elevator shaft, and a limit component is fixedly connected to the inner wall of the elevator shaft in an axisymmetric manner, and a monitoring component is disposed on the surface of the limit component;

[0007] The limiting component includes an installation plate that is fixedly connected to the inner wall of the elevator shaft in an axisymmetric manner. An electric hydraulic rod is fixedly connected to the top surface of the installation plate. A support block is fixedly connected to one end of the electric hydraulic rod. A sleeve hole is opened on the top surface of the support block. Infrared probes are sleeved at both ends inside the sleeve hole.

[0008] The monitoring component includes a control board fixedly connected inside the support block. Two pressure sensors are electrically connected to the surface of the control board. The pressure sensors are fixedly connected to the top surface of the support block in an axisymmetric manner. A contact plate is fixedly connected to the top surface of the pressure sensors.

[0009] In one specific embodiment, the infrared probe is electrically connected to the control board, the control board is electrically connected to the electro-hydraulic rod, and the pressure sensor is electrically connected to the control board.

[0010] In one specific embodiment, multiple mounting plates are spaced apart along the vertical direction of the inner wall of the elevator shaft.

[0011] In one specific embodiment, a pressure transmission structure is formed between the top surface of the support block and the contact plate through the pressure sensor.

[0012] In one specific embodiment, when the electro-hydraulic rod extends, it drives the contact plate to move to the bearing surface directly below the car.

[0013] In one specific embodiment, the control board is configured to trigger the extension of the electro-hydraulic rod via an infrared probe and to trigger the retraction of the electro-hydraulic rod via real-time pressure changes detected by a pressure sensor.

[0014] Compared with the prior art, the present invention provides an elevator car safety locking device, which has the following beneficial effects:

[0015] In the technical solution disclosed in this utility model, the electric hydraulic rod of the limiting component drives the rigid support block and the contact plate to form a mechanical support structure, which replaces the negative pressure adsorption method and significantly improves the locking and load-bearing capacity of the car. Combined with the infrared probe of the monitoring component to accurately trigger the action and the pressure sensor to detect pressure changes in real time, it realizes millisecond-level response locking and releasing, solving the problem of insufficient stability of traditional adsorption when the car is loaded.

[0016] The limiting and monitoring components of this invention, through the electric hydraulic rod driving the support block and contact plate in the limiting component to form a rigid mechanical support structure, directly bear the entire weight of the car. Compared with the negative pressure adsorption method relying on vacuum suction cups in the prior art, the mechanical support load-bearing capacity is increased by more than 100 times, completely solving the adsorption failure problem caused by excessive weight when the car is carrying passengers. At the same time, the infrared probe detects the position of the car in real time and triggers the control board to start the extension of the electric hydraulic rod, so that the contact plate moves precisely to the bearing surface directly under the car. When the car stops, the pressure sensor detects the pressure data of the contact plate in real time. At the moment the car starts, the pressure sensor captures the pressure change signal and feeds it back to the control board. The control board controls the electric hydraulic rod to retract to achieve zero-delay unlocking, greatly improving the response speed. In addition, the mounting plate is set with multiple locking points at intervals along the vertical direction of the inner wall of the elevator shaft, forming a multi-layer locking point. Combined with the pressure transmission structure formed by the symmetrically arranged pressure sensors and contact plates, the detection and locking functions can still be maintained through redundant design in the event of a single point failure, providing double protection for system safety. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the limiting component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the monitoring component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0022] In the diagram: 1. Elevator shaft; 2. Car; 3. Limiting component; 31. Mounting plate; 32. Electro-hydraulic rod; 33. Support block; 34. Infrared sensor; 4. Monitoring component; 41. Control board; 42. Pressure sensor; 43. Contact plate. Detailed Implementation

[0023] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Figures 1-4 As an embodiment of the present invention, an elevator car safety locking device includes an elevator shaft 1, an elevator car 2 is disposed inside the elevator shaft 1, a limit component 3 is fixedly connected to the inner wall of the elevator shaft 1 in an axisymmetric manner, and a monitoring component 4 is disposed on the surface of the limit component 3.

[0025] The specific problem addressed in this embodiment is the poor effectiveness of relying on negative pressure for car positioning, especially when there are passengers inside the car, resulting in a higher overall weight and making it difficult to stably position the car using negative pressure. This invention utilizes the electro-hydraulic rod 32 of the limiting component 3 to drive the rigid support block 33 and contact plate 43 to form a mechanical support structure, replacing the negative pressure adsorption method and significantly improving the locking and load-bearing capacity of the car 2. Combined with the infrared probe 34 of the monitoring component 4 for precise triggering and the pressure sensor 42 for real-time pressure change detection, it achieves millisecond-level response locking and releasing, solving the problem of insufficient stability of traditional adsorption when the car is loaded.

[0026] The limiting component 3 includes a mounting plate 31 fixedly connected to the inner wall of the elevator shaft 1 in an axisymmetric manner. An electric hydraulic rod 32 is fixedly connected to the top surface of the mounting plate 31. A support block 33 is fixedly connected to one end of the electric hydraulic rod 32. A sleeve hole is opened on the top surface of the support block 33, and infrared probes 34 are sleeved at both ends inside the sleeve hole. The monitoring component 4 includes a control board 41 fixedly connected to the inside of the support block 33. Two pressure sensors 42 are electrically connected to the surface of the control board 41. The pressure sensors 42 are fixedly connected to the top surface of the support block 33 in an axisymmetric manner. A contact plate 43 is fixedly connected to the top surface of the pressure sensors 42. In this specific embodiment, the infrared probe 34 of model Banner QS18VP6LPQ5 is electrically connected to the control board 41 of model Siemens LOGO! 8 12 / 24RCE. The control board 41 is electrically connected to the electric hydraulic rod 32. The pressure sensor 42 of model TE Connectivity M3200-000005-01KPG is electrically connected to the control board 41. The limit assembly 3 uses an electric hydraulic rod 32 to drive the support block 33 and contact plate 43 to form a rigid mechanical support structure, directly bearing the entire weight of the car 2. Compared with the negative pressure adsorption method of vacuum suction cups in the prior art, the mechanical support has improved load-bearing capacity and completely solves the adsorption failure problem caused by excessive weight when the car 2 is carrying passengers. At the same time, the infrared probe 34 detects the position of the car 2 in real time and triggers the control board 41 to start the extension of the electric hydraulic rod 32, so that the contact plate 43 moves precisely to the bearing surface directly under the car 2. When the car 2 stops, the pressure sensor 42 detects the pressure data of the contact plate 43 in real time. At the moment the car 2 starts, the pressure sensor 42 captures the pressure change signal and feeds it back to the control board 41. The control board 41 controls the electric hydraulic rod 32 to retract to achieve zero-delay unlocking and greatly improve the response speed. In addition, the mounting plate 31 is set with multiple locking points at intervals along the vertical direction of the inner wall of the elevator shaft 1. With the pressure transmission structure formed by the symmetrically arranged pressure sensor 42 and contact plate 43, the detection and locking functions can still be maintained through redundant design in the event of a single point failure, providing double protection for system safety.

[0027] In this specific embodiment, a pressure transmission structure is formed between the top surface of the support block 33 and the contact plate 43 through a pressure sensor 42. Specifically, the pressure sensor 42 is embedded in the groove on the top surface of the support block 33, and its sensing surface is rigidly bonded to the bottom surface of the contact plate 43. When the car 2 stops, gravity is transmitted to the contact plate 43, and the contact plate 43 applies vertical pressure directly to the force-bearing surface of the pressure sensor 42 and generates a pressure electrical signal, which is transmitted to the control board 41 in real time. This structure converts mechanical pressure into a quantifiable electrical signal through physical transmission, enabling the system to accurately monitor the load status of the car 2. At the same time, the symmetrically arranged dual pressure sensors 42 form redundant detection, so that the pressure detection function can still be maintained by the other sensor when a single sensor fails, avoiding a lock-up accident due to a single point of failure.

[0028] In this specific embodiment, when the electro-hydraulic rod 32 extends, it drives the contact plate 43 to move to the bearing surface directly below the car 2. When the electro-hydraulic rod 32 extends, it drives the contact plate 43 to move horizontally to the bearing surface directly below the car 2. In specific implementation, after the infrared probe 34 detects the car 2 approaching, the electro-hydraulic rod 32 receives a command from the control board 41, and its piston rod extends at a constant speed along the guide rail direction, pushing the support block 33 and the contact plate 43 fixed on its top to move synchronously to the area directly below the chassis projection area of ​​the car 2, so that when the car 2 stops, the chassis completely falls into the bearing range of the contact plate 43. This movement method ensures that the contact plate 43 is accurately positioned through rigid mechanical propulsion, forming a full contact bearing surface with the bottom of the car 2. Compared with the distributed suction cup contact in the prior art, this design increases the pressure bearing area by more than 5 times, and evenly distributes the pressure to avoid local overload, significantly reducing the risk of car 2 shaking.

[0029] Working principle: When the car 2 moves to the target floor in the elevator shaft 1, the infrared sensor 34 of the limit component 3 detects the distance to the bottom of the car 2 in real time and generates a position signal, which is transmitted to the control board 41 of the monitoring component 4. After receiving the signal, the control board 41 immediately starts the extension of the electric hydraulic rod 32, pushing the support block 33 and the contact plate 43 fixed on its top to move horizontally to the bearing surface directly below the car 2. When the car 2 stops, its chassis falls onto the surface of the contact plate 43, and gravity is transmitted to the pressure sensor 42 through the contact plate 43. The pressure sensor 42 feeds back the real-time pressure data to the control board 41 and maintains the extension of the electric hydraulic rod 32. At this time, the rigid contact plate 43 forms a mechanical lock on the car 2. When the car 2 needs to start, its chassis moves upward and causes the pressure value detected by the pressure sensor 42 to drop sharply. The pressure sensor 42 generates a change signal to trigger the control board 41. The control board 41 immediately controls the electric hydraulic rod 32 to retract, driving the contact plate 43 to return to its original position synchronously, releasing the locking constraint on the car 2.

[0030] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0031] 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.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator car safety locking device, comprising an elevator shaft (1), characterized in that: The elevator shaft (1) is equipped with a car (2) inside. The inner wall of the elevator shaft (1) is fixedly connected with a limit assembly (3) in an axisymmetric manner. The surface of the limit assembly (3) is equipped with a monitoring assembly (4). The limiting component (3) includes an installation plate (31) fixedly connected to the inner wall of the elevator shaft (1) in an axisymmetric manner. An electric hydraulic rod (32) is fixedly connected to the top surface of the installation plate (31). A support block (33) is fixedly connected to one end of the electric hydraulic rod (32). A sleeve hole is opened on the top surface of the support block (33). An infrared probe (34) is sleeved at both ends inside the sleeve hole. The monitoring component (4) includes a control board (41) fixedly connected inside the support block (33). Two pressure sensors (42) are electrically connected to the surface of the control board (41). The pressure sensors (42) are fixedly connected to the top surface of the support block (33) in an axisymmetric manner. A contact plate (43) is fixedly connected to the top surface of the pressure sensors (42).

2. The elevator car safety locking device according to claim 1, characterized in that: The infrared probe (34) is electrically connected to the control board (41), the control board (41) is electrically connected to the electric hydraulic rod (32), and the pressure sensor (42) is electrically connected to the control board (41).

3. The elevator car safety locking device according to claim 1, characterized in that: Multiple mounting plates (31) are spaced at intervals along the vertical direction of the inner wall of the elevator shaft (1).

4. The elevator car safety locking device according to claim 1, characterized in that: The top surface of the support block (33) and the contact plate (43) form a pressure transmission structure through the pressure sensor (42).

5. The elevator car safety locking device according to claim 1, characterized in that: When the electric hydraulic rod (32) extends, it drives the contact plate (43) to move to the bearing surface directly below the car (2).

6. The elevator car safety locking device according to claim 1, characterized in that: The control panel (41) is configured to trigger the extension of the electro-hydraulic rod (32) via an infrared probe (34) and to trigger the contraction of the electro-hydraulic rod (32) via real-time pressure changes detected by a pressure sensor (42).

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