A safety detection device for preventing falls in elevators

Abstract

This utility model discloses a safety detection device for preventing falls in elevators, including an elevator cage. A slider is fixed to the outside of the elevator cage, and a slide rail slides on the inside of the slider. A fixing plate is fixed to the outside of the elevator cage, and a rotating shaft rotates between the fixing plates. A drive mechanism is provided at the end of the rotating shaft to drive its rotation, and a movable plate is threaded on the outside of the rotating shaft. This safety detection device for preventing falls in elevators, by activating a servo motor, can cause two movable plates on the four rotating shafts to move closer to each other. At the same time, the two movable plates can drive two rectangular blocks to move closer to each other, thereby allowing the rubber sheets at the ends of the two rectangular blocks to abut against the sides of the slide rail. This increases the contact area between the slide rail and the rubber sheets, increases the damping force of the rubber sheets on the slide rail, shortens the time for the elevator cage to stop falling, and improves the safety of the elevator cage.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator cage equipment, specifically to an elevator anti-fall safety detection device. Background Technology

[0002] Construction hoists, also known as building construction elevators or outdoor elevators, are used in construction site hoisting cages. They are primarily used in high-rise and super high-rise buildings in cities, where the height makes it extremely difficult to complete operations using scaffolding or gantry cranes. Construction hoists are frequently used personnel and cargo transport machines in construction, mainly for interior and exterior decoration of high-rise buildings, bridges, chimneys, and other construction work.

[0003] For example, Chinese utility model patent with authorization announcement number CN221720238U discloses a safety detection device for preventing the cage of a construction hoist from falling. It includes two parallel slide rails and a cage body. Sliding sleeves are slidably provided on the outer sides of the two slide rails. The cage body is fixedly connected to the sliding sleeves. A braking component for the cage body is provided on the sliding sleeves. A safety detection component for controlling the braking component is provided inside the cage body. The safety detection component includes multiple fixed cylinders fixedly installed on the bottom of the cage body. Springs are installed inside the multiple fixed cylinders. A sliding rod is fixedly installed on the top of the spring.

[0004] The aforementioned patent describes a method where a double-headed hydraulic rod pushes a friction block to press against a slide rail. The friction between the friction block and the slide rail gradually stops and fixes the falling cage. However, since the friction block can only contact one side of the slide rail, the contact area between the two is small, resulting in low damping from the friction block to the slide rail. This leads to a longer time for the cage to stop falling, posing a significant risk.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on the existing safety detection devices for elevator fall prevention. Utility Model Content

[0006] The purpose of this invention is to provide a safety detection device for preventing elevator falls, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a safety detection device for preventing falls in elevators, comprising an elevator cage, a slider fixed to the outside of the elevator cage, a slide rail sliding on the inside of the slider, a fixing plate fixed to the outside of the elevator cage, a rotating shaft rotatably connected between the fixing plates, a driving mechanism for driving the rotation of the rotating shaft at its end, a movable plate threaded on the outside of the rotating shaft, a rectangular block fixed to the end of the movable plate, a rectangular through groove on one side of the slider, and the rectangular block sliding inside the rectangular through groove.

[0008] Preferably, the slide rail is configured with an "I" shaped structure, the slider is configured with a "T" shaped structure, and the inner side of the slider is in contact with the outer side of the slide rail.

[0009] Preferably, there are two slide rails symmetrically distributed about the central axis of the elevator cage, and two sliders are provided on the slide rails.

[0010] Preferably, the drive mechanism includes a second fixed plate, the outer wall of the elevator cage is fixed with the second fixed plate, a second rotating shaft is rotatably connected between the second fixed plates, a first bevel gear is fixed to the second rotating shaft, the first bevel gear meshes with the second bevel gear, the second bevel gear is fixedly connected to the first rotating shaft, and a servo motor for driving its rotation is provided at the upper end of the second rotating shaft.

[0011] Preferably, two bevel gears are provided on the second rotating shaft, and both the second bevel gear and the first rotating shaft are symmetrically distributed about the central axis of the first bevel gear, and four bevel gears and four rotating shafts are provided on each.

[0012] Preferably, a rubber sheet is fixed to the end of the rectangular block, and the rubber sheet is positioned close to the slide rail.

[0013] Preferably, the two ends of the rotating shaft located between the fixed plate are provided with opposite threads, and the movable plate, rectangular through groove, rectangular block and rubber sheet are symmetrically distributed in twos about the central axis of the slider.

[0014] Preferably, the top of the elevator cage is fixed with fixing lugs, and there are two fixing lugs symmetrically distributed about the central axis of the elevator cage.

[0015] Preferably, a speed sensor is installed on the outside of the hoist cage, and the speed sensor, servo motor and controller on the hoist are electrically connected.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This elevator anti-fall safety detection device, by activating a servo motor, can cause two movable plates on the four rotating shafts to move closer to each other. At the same time, the two movable plates can drive two rectangular blocks to move closer to each other, thereby enabling the rubber sheets at the ends of the two rectangular blocks to abut against the sides of the slide rail, increasing the contact area between the slide rail and the rubber sheets, increasing the damping force of the rubber sheets on the slide rail, shortening the time for the elevator cage to stop falling, and improving the safety of the elevator cage; moreover, only one servo motor is needed to achieve tight contact between eight rubber sheets and eight points on the slide rail, reducing the manufacturing cost of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the present invention viewed from below; Figure 4 This is a top view of the structure of this utility model; Figure 5 This is a cross-sectional view of the rectangular block installation structure of this utility model; Figure 6 This is a cross-sectional view of the mounting structure of the slider of this utility model.

[0019] In the diagram: 1. Lift cage; 2. Slide rail; 3. Slider; 4. Fixed plate one; 5. Rotating shaft one; 6. Movable plate; 7. Rectangular through groove; 8. Rectangular block; 9. Rubber sheet; 10. Fixed plate two; 11. Rotating shaft two; 12. Bevel gear one; 13. Bevel gear two; 14. Servo motor; 15. Speed ​​sensor; 16. Fixed lug. Detailed Implementation

[0020] The following detailed description of the human resources office desk of the present invention, in conjunction with the accompanying drawings and embodiments thereof, will be provided in further detail.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Please see Figure 1-6 This utility model provides a technical solution: a safety detection device for preventing falls in elevators, including an elevator cage 1, a slider 3 fixed to the outside of the elevator cage 1, a slide rail 2 sliding on the inside of the slider 3, a fixing plate 4 fixed to the outside of the elevator cage 1, a rotating shaft 5 rotatably mounted between the fixing plates 4 via bearings, a drive mechanism for driving the rotation of the rotating shaft 5 at its end, a movable plate 6 threaded on the outside of the rotating shaft 5, a rectangular block 8 fixed to the end of the movable plate 6, a rectangular through groove 7 opened on one side of the slider 3, the rectangular block 8 sliding inside the rectangular through groove 7, and a rubber sheet 9 fixed to the end of the rectangular block 8, the rubber sheet 9 being close to the slide rail. 2. The above-mentioned structural design increases the friction between the rectangular block 8 and the slide rail 2. The two ends of the rotating shaft 5 located between the fixed plate 4 are provided with opposite threads. The movable plate 6, the rectangular through groove 7, the rectangular block 8 and the rubber sheet 9 are symmetrically distributed about the central axis of the slider 3. When the rotating shaft 5 rotates, it can make the two rectangular blocks 8 move closer to each other, so that the rubber sheet 9 at the ends of the two rectangular blocks 8 can abut against the two sides of the slide rail 2, which increases the contact area between the slide rail 2 and the rubber sheet 9, increases the damping force of the rubber sheet 9 on the slide rail 2, shortens the time for the elevator cage 1 to stop falling, and improves the safety of the elevator cage 1.

[0026] In this example, the slide rail 2 is designed with an "I" shape, and the slider 3 is designed with a "T" shape. The inner side of the slider 3 fits into the outer side of the slide rail 2. There are two slide rails 2 symmetrically distributed about the central axis of the hoist cage 1. Two sliders 3 are set on the slide rail 2. The above structural design allows the slider 3 to slide stably on the slide rail 2.

[0027] The drive mechanism in this example includes a fixed plate 2 10. The fixed plate 2 10 is fixed to the outer wall of the hoist cage 1. A rotating shaft 2 11 is rotatably mounted between the fixed plates 2 10 via bearings. A bevel gear 12 is fixed to the outer wall of the rotating shaft 2 11. A bevel gear 2 13 meshes with one side of the bevel gear 12. The middle part of one side of the bevel gear 2 13 is fixedly connected to the end of the rotating shaft 1 5. A servo motor 14 is provided at the upper end of the rotating shaft 2 11 to drive its rotation. The outer wall of the servo motor 14 is fixed to the fixed plate 2 10 by bolts. There are two bevel gears 12 on the rotating shaft 2 11. The bevel gears 2 13 and the rotating shaft 1 5 are symmetrically distributed about the central axis of the bevel gears 12. There are four bevel gears 2 13 and four rotating shafts 1 5. By starting the servo motor 14, all four rotating shafts 1 5 can rotate simultaneously.

[0028] In this example, the top of the hoist cage 1 is fixed with a fixing lug 16. There are two fixing lugs 16 symmetrically distributed about the central axis of the hoist cage 1. The fixing lugs 16 can be connected to the winch at the top of the hoist via a hoisting rope. The winch can drive the hoist cage 1 to rise and fall.

[0029] In this example, a speed sensor 15 is installed on the outside of the hoist cage 1. The speed sensor 15 and the servo motor 14 are electrically connected to the controller on the hoist.

[0030] Working principle: When the hoist cage 1 falls, the speed sensor 15 detects that the descent speed of the hoist cage 1 is greater than the preset value. The speed sensor 15 transmits the signal to the controller on the hoist. The controller controls the servo motor 14 to rotate. The servo motor 14 drives one rotating shaft 11, two bevel gears 12, four bevel gears 13 and four rotating shafts 5 to rotate simultaneously. Therefore, the two movable plates 6 on each rotating shaft 5 move closer to each other. At the same time, the two movable plates 6 drive the two rectangular blocks 8 to move closer to each other inside the rectangular through groove 7, so that the rubber pieces 9 at the ends of the two rectangular blocks 8 abut against the sides of the slide rail 2, so that the hoist cage 1 stops falling.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A safety detection device for preventing falls in elevators, comprising an elevator cage (1), wherein a slider (3) is fixed to the outer side of the elevator cage (1), and a slide rail (2) slides on the inner side of the slider (3), characterized in that: The hoist cage (1) is fixed with a fixed plate (4) on the outside. A rotating shaft (5) rotates between the fixed plates (4). The end of the rotating shaft (5) is provided with a driving mechanism to drive its rotation. A movable plate (6) is threaded on the outside of the rotating shaft (5). A rectangular block (8) is fixed at the end of the movable plate (6). A rectangular through groove (7) is opened on one side of the slider (3). The rectangular block (8) slides inside the rectangular through groove (7).

2. The elevator fall prevention safety detection device according to claim 1, characterized in that: The slide rail (2) is configured with an "I" shape, and the slider (3) is configured with a "T" shape. The inner side of the slider (3) is in contact with the outer side of the slide rail (2).

3. The elevator fall prevention safety detection device according to claim 2, characterized in that: There are two slide rails (2) symmetrically distributed about the central axis of the elevator cage (1), and two sliders (3) are provided on the slide rails (2).

4. The elevator fall prevention safety detection device according to claim 1, characterized in that: The drive mechanism includes a second fixed plate (10), the outer wall of the elevator cage (1) is fixed with the second fixed plate (10), the second fixed plate (11) rotates between the second fixed plates (10), the second fixed plate (11) is fixed with a first bevel gear (12), the first bevel gear (12) meshes with the second bevel gear (13), the second bevel gear (13) is fixedly connected to the first fixed plate (5), and the upper end of the second fixed plate (11) is provided with a servo motor (14) that drives its rotation.

5. The elevator fall prevention safety detection device according to claim 4, characterized in that: Two bevel gears (12) are provided on the second shaft (11). Both the second bevel gear (13) and the first shaft (5) are symmetrically distributed about the central axis of the first bevel gear (12). There are four bevel gears (13) and four shafts (5).

6. The elevator fall prevention safety detection device according to claim 1, characterized in that: A rubber sheet (9) is fixed to the end of the rectangular block (8), and the rubber sheet (9) is positioned close to the slide rail (2).

7. The elevator fall prevention safety detection device according to claim 6, characterized in that: The rotating shaft (5) is provided with opposite threads at both ends between the fixed plate (4). The movable plate (6), rectangular through groove (7), rectangular block (8) and rubber sheet (9) are symmetrically distributed about the central axis of the slider (3) in two places.

8. The elevator fall prevention safety detection device according to claim 1, characterized in that: The top of the elevator cage (1) is fixed with a fixing lug (16), and there are two fixing lugs (16) symmetrically distributed about the central axis of the elevator cage (1).

9. The elevator fall prevention safety detection device according to claim 4, characterized in that: A speed sensor (15) is installed on the outside of the hoist cage (1). The speed sensor (15) and the servo motor (14) are electrically connected to the controller on the hoist.

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