An electric roller shutter abnormal failure lower sliding limiting device

Abstract

The utility model relates to a kind of electric roller shutter door abnormal failure downslide limiting device, including centrifugal governor, winder, stress plate and limiting component, the bottom of roller shutter door panel is horizontally provided with stress plate, the left and right ends of stress plate respectively extend into the inboard of the left and right two door frames of roller shutter door, the top of the left and right ends of stress plate is provided with limiting component, the left and right sides above roller shutter door are provided with fixed part, fixed part is provided with centrifugal governor, the output end of centrifugal governor is provided with winder, the rotation axis of centrifugal governor and winder rotates synchronously, winder is used for winding thin rope when rotating, the movable end of thin rope is fixedly connected with limiting component, when roller shutter door abnormally slides down, triggers centrifugal governor lock, winder stops rotating thin rope and no longer elongates, by pulling limiting component, winder can be immediately driven to rotate by thin rope, and then trigger centrifugal governor lock, brake roller shutter door panel, effectively prevent roller shutter door panel continue to slide down.

Description

Technical Field

[0001] This utility model relates to the field of roller shutter door limiting technology, specifically a sliding limit device for abnormal failure of electric roller shutter door. Background Technology

[0002] The existing limit devices of roller shutters sometimes fail, causing them to slide down during the rising and falling process, resulting in personal injury and safety issues during the transportation of semi-finished materials. Therefore, it is necessary to design a limit device that can promptly limit the roller shutter when the original limit device fails. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a sliding limit device for abnormal failure of electric roller shutter doors, which addresses the above-mentioned shortcomings.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: A sliding limit device for abnormal failure of an electric roller shutter door includes a centrifugal speed limiter, a winding device, a force plate, and limit components. A force plate is horizontally arranged at the bottom of the roller shutter door panel. The left and right ends of the force plate extend into the inner sides of the left and right door frames of the roller shutter door, respectively. Limit components are provided at the top of both ends of the force plate. The limit components are used to fix the roller shutter door to the door frame by engaging with it, thus braking the roller shutter door panel. Fixing members are provided on the left and right sides above the roller shutter door. A centrifugal speed limiter is installed on the top, and a winding device is installed at the output end of the centrifugal speed limiter. The shafts of the centrifugal speed limiter and the winding device rotate synchronously. When the winding device rotates, it is used to wind up the thin rope. The movable end of the thin rope is fixedly connected to the limiting component. When the roller shutter door panel slides down abnormally, the winding device drives the centrifugal speed limiter to rotate and simultaneously lengthens the thin rope. The centrifugal speed limiter is used to lock the shaft when the rotation speed exceeds the preset limit speed, so that the winding device stops rotating and the thin rope pulls the limiting component to brake the roller shutter door panel.

[0005] Furthermore, the limiting component includes a mounting block, a limiting block, and a sliding pressing block. The mounting block has horizontally formed first cavities on its left and right sides for placing and guiding two limiting blocks. The two limiting blocks are symmetrically placed with their opposite sides being inclined. The mounting block also has a vertically formed second cavity for placing and guiding the sliding pressing block. The second cavity is connected to the first cavity. The bottom of the sliding pressing block is trapezoidal, and its two inclined sides respectively abut against the opposite sides of the left and right limiting blocks. The trapezoidal body has T-shaped grooves on each side, and T-shaped sliders corresponding to the T-shaped grooves are provided on the two inclined sides of the trapezoidal body. The T-shaped sliders are used to guide the sliding extrusion block to move vertically up and down in cooperation with the T-shaped grooves. The upper end of the sliding extrusion block is connected to the lower end of the thin rope, and is used to move upward under the pull of the thin rope when the roller shutter door panel slides abnormally, so that the two limit blocks are used to press the two sides inside the roller shutter door frame at one end and brake the roller shutter door panel through pressure and friction. The side of the limit block that contacts the roller shutter door frame is provided with an anti-slip rubber sheet to increase friction.

[0006] Furthermore, each of the two T-shaped sliders is provided with an arc-shaped elastic sheet in the middle. The arc surface of the arc-shaped elastic sheet is convex. A connecting rod is provided on the inner side of the arc-shaped elastic sheet. The connecting rod is perpendicular to the side of the trapezoidal body, passes through the T-shaped slider, and extends to the inner side of the trapezoidal body. The connecting rod can also slide on the inner side of the trapezoidal body. The connecting rod is used to fix the arc-shaped elastic sheet. The side of the limiting block near the sliding pressing block is provided with a groove corresponding to the arc-shaped elastic sheet. When the roller shutter door panel is running normally, the arc-shaped elastic sheet is located on the lower surface of the limiting block and is used to limit the limiting block.

[0007] Furthermore, the preset limit speed of the centrifugal speed limiter is the same as the speed of the electric roller shutter motor.

[0008] Furthermore, the force plate has a through hole that communicates with the second cavity, and the top of the sliding extrusion block is provided with a reset ring located inside the through hole. After the limiting component is activated, it can pull the sliding extrusion block down to reset by pulling the reset ring down, and the sliding extrusion block drives the limiting block to reset.

[0009] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: This invention incorporates a centrifugal speed limiter, a winding mechanism, a force-bearing plate, and a limiting component. When the roller shutter door panel slides abnormally, the centrifugal speed limiter locks, the winding mechanism stops rotating, and the rope no longer extends. The limiting component then brakes the roller shutter door panel, providing a fast response and effectively shortening the braking distance, thus reducing damage caused by sliding. The arc-shaped elastic plate in the middle of the slider restricts the sliding between the sliding compression block and the limiting block during normal operation of the roller shutter door, preventing malfunctions and improving the accuracy and reliability of the device. The reset ring resets the limiting component after activation, allowing for reuse.

[0010] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0011] Figure 1 A schematic diagram showing the installation positions of the centrifugal speed limiter and the winder (rear view of the roller shutter door). Figure 2 A schematic diagram showing the installation positions of the centrifugal speed limiter, winder, and limit assembly (the roller shutter door frame is omitted). Figure 3 This is a cross-sectional view of the internal structure of the limiting component (the left limiting block is omitted). Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 A top view of the limiting block, sliding extrusion block, and connecting structure; Figure 6 This is a top view showing the relationship between the start-up state of the limit component and the position of the roller shutter door frame.

[0012] The attached diagram lists the components represented by each number as follows: 1. Centrifugal speed limiter; 2. Winder; 3. Force plate; 4. Limiting assembly; 401. Mounting block; 402. Limiting block; 403. Sliding compression block; 404. First cavity; 405. Second cavity; 406. T-shaped groove; 407. T-shaped slider; 408. Arc-shaped elastic sheet; 409. Connecting rod; 4010. Groove; 5. Fixing component; 6. Through hole; 7. Reset ring; 8. Thin rope. Detailed Implementation

[0013] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0014] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0015] like Figure 1-6 As shown, an abnormal failure sliding limit device for an electric roller shutter door includes a centrifugal speed limiter 1, a winding device 2, a force plate 3, and a limit assembly 4. The force plate 3 is horizontally arranged at the bottom of the roller shutter door panel. The left and right ends of the force plate 3 extend into the inner sides of the left and right door frames of the roller shutter door, respectively. Limit assemblies 4 are provided at the top of both the left and right ends of the force plate 3. The limit assemblies 4 are used to fix the roller shutter door to the door frame by engaging with it, thus braking the roller shutter door panel. Fixing members 5 are provided on the left and right sides above the roller shutter door. A centrifugal speed limiter 1 is provided, and a winder 2 is provided at the output end of the centrifugal speed limiter 1. The rotating shafts of the centrifugal speed limiter 1 and the winder 2 rotate synchronously. When the winder 2 rotates, it is used to wind up the thin rope 8. The movable end of the thin rope 8 is fixedly connected to the limiting component 4. When the roller shutter door panel slides down abnormally, the winder 2 drives the centrifugal speed limiter 1 to rotate and simultaneously lengthens the thin rope 8. The centrifugal speed limiter 1 is used to lock the rotating shaft when the rotation speed exceeds the preset limit speed, so that the winder 2 stops rotating and the thin rope 8 pulls the limiting component to brake the roller shutter door panel.

[0016] In one embodiment, the limiting component 4 includes a mounting block 401, a limiting block 402, and a sliding pressing block 403. The mounting block 401 has horizontally formed first cavities 404 on its left and right sides for placing and guiding the two limiting blocks 402. The two limiting blocks 402 are symmetrically placed with their opposite sides being inclined. The mounting block 401 has a vertically formed second cavity 405 for placing and guiding the sliding pressing block 403. The second cavity 405 is connected to the first cavity 404. The bottom of the sliding pressing block 403 is trapezoidal, and its two inclined sides respectively abut against the opposite sides of the left and right limiting blocks 402. Each of the opposite sides of the limiting block 402 is provided with a T-shaped groove 406. The two inclined sides of the trapezoidal body are provided with T-shaped sliders 407 corresponding to the T-shaped grooves 406. The T-shaped sliders 407 are used to guide the sliding pressing block 403 to move vertically up and down in cooperation with the T-shaped grooves 406. The upper end of the sliding pressing block 403 is connected to the lower end of the thin rope 8, and is used to move upward under the pull of the thin rope 8 when the roller shutter door panel slides abnormally, pressing the limiting block 402 to slide outward, so that the two limiting blocks 402 are respectively used to press the two sides inside one end of the roller shutter door frame and brake the roller shutter door panel through pressure and friction. The side of the limiting block 402 that contacts the roller shutter door frame is provided with an anti-slip rubber sheet to increase friction.

[0017] In one embodiment, each of the two T-shaped sliders 407 is provided with an arc-shaped elastic sheet 408 in the middle. The arc surface of the arc-shaped elastic sheet 408 is an outwardly convex surface. A connecting rod 409 is provided on the inner side of the arc-shaped elastic sheet 408. The connecting rod 409 is perpendicular to the side of the trapezoidal body, passes through the T-shaped slider 407, and extends to the inner side of the trapezoidal body. The connecting rod 409 can also slide on the inner side of the trapezoidal body. The connecting rod 409 is used to fix the arc-shaped elastic sheet 408. The side of the limiting block 402 near the sliding pressing block 403 is provided with a groove 4010 corresponding to the arc-shaped elastic sheet 408. When the roller shutter door panel is running normally, the arc-shaped elastic sheet 408 is located on the lower surface of the limiting block 402 and is used to limit the limiting block 402.

[0018] In one implementation, the preset limit speed of the centrifugal speed limiter 1 is the same as the speed of the electric roller shutter motor.

[0019] In one embodiment, the force plate 3 is provided with a through hole 6 that communicates with the second cavity 405. The top of the sliding extrusion block 403 is provided with a reset ring 7 located inside the through hole 6. After the limiting component 4 is activated, it can pull the sliding extrusion block 403 down to reset by pulling the reset ring 7 down. The sliding extrusion block 403 drives the limiting block 402 to reset.

[0020] In this utility model, a cavity is left between the T-shaped slider 407 and the T-shaped groove 406. The cavity is used to accommodate the arc-shaped elastic sheet 408 under the extrusion state. When the roller shutter door is working normally, the arc-shaped elastic sheet 408 relies on its own elasticity to reset and lock the sliding extrusion block 403. The arc-shaped elastic sheet 408 is made of metal. The top of the sliding extrusion block 403 has the same shape as the second cavity 405.

[0021] The working process of this utility model is as follows: During the normal rising or falling of the roller shutter door, the centrifugal speed limiter 1 and the winding mechanism 2 rotate synchronously. The sliding compression block 403 and the limiting block 402 in the limiting assembly 4 are relatively stationary due to the constraint of the arc-shaped elastic sheet 408. The limiting block 402 does not extend, allowing the roller shutter door panel to move freely. When the roller shutter door panel slides abnormally, it causes the force plate 3 and the limiting assembly 4 to slide down together. Since the limiting assembly 4 is connected to the winding mechanism 2 via a thin rope 8, the downward movement causes the thin rope 8 to quickly pull the winding mechanism 2, resulting in a sharp increase in the winding mechanism 2's rotational speed. After the winding mechanism 2's rotational speed exceeds the limit speed of the centrifugal speed limiter 1, the centrifugal speed limiter 1 immediately locks the rotating shaft, preventing the winding mechanism 2 from continuing to rotate. After the winding mechanism 2 stops rotating, the thin rope 8 is in a taut state, pulling the sliding compression block 403 in the limiting assembly 4 upwards. The trapezoidal bottom of the sliding compression block 403 presses against the two limiting blocks 402 on both sides, causing the limiting blocks 402 to extend outward along the first cavity 404. The extended limiting blocks 402 abut against the roller shutter door frame, fixing the roller shutter door panel through pressure and friction, preventing it from continuing to slide down. At the same time, the arc-shaped elastic sheet 408 is forcibly compressed and moves upward with the sliding compression block until it moves to the inside of the groove 4010 and then elastically resets, fixing the sliding compression block 403 and the limiting blocks 402 together, so that the limiting blocks 402 can fit tightly against the roller shutter door frame. After the abnormality is resolved, when the centrifugal speed limiter 1 is reset, the roller shutter door panel needs to be moved upward first to release the tension of the thin rope 8. Then, the limiting claw is reset by the reset switch of the centrifugal speed limiter 1. Then, the reset ring 7 needs to be manually pulled down with a tool to reset the limiting component 4. When pulling the reset ring 7, the force plate 3 needs to be supported.

[0022] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A sliding limit device for abnormal failure of an electric roller shutter door, characterized in that, The roller shutter includes a centrifugal speed limiter (1), a winding device (2), a force plate (3), and a limiting component (4). A force plate (3) is horizontally positioned at the bottom of the roller shutter door panel. The left and right ends of the force plate (3) extend into the inner sides of the left and right door frames of the roller shutter door, respectively. Limiting components (4) are positioned at the top of both the left and right ends of the force plate (3). The limiting components (4) are used to fix the roller shutter door relative to the door frame by engaging with it, thus braking the roller shutter door panel. Fixing members (5) are positioned on the left and right sides above the roller shutter door. A centrifugal speed limiter (1) is mounted on each fixing member (5). The centrifugal speed limiter (1) is provided with a winding device (2) at its output end. The shafts of the centrifugal speed limiter (1) and the winding device (2) rotate synchronously. When the winding device (2) rotates, it is used to wind up the thin rope (8). The movable end of the thin rope (8) is fixedly connected to the limiting component (4). When the roller shutter door panel slides down abnormally, the winding device (2) drives the centrifugal speed limiter (1) to rotate and simultaneously lengthens the thin rope (8). The centrifugal speed limiter (1) is used to lock the shaft when the rotation speed exceeds the preset limit speed, so that the winding device (2) stops rotating and the thin rope (8) pulls the limiting component to brake the roller shutter door panel.

2. The electric roller shutter door abnormal failure downward limiting device according to claim 1, characterized in that, The limiting component (4) includes a mounting block (401), a limiting block (402), and a sliding pressing block (403). The mounting block (401) has horizontally opened first cavities (404) on its left and right sides for placing and guiding the two limiting blocks (402). The two limiting blocks (402) are symmetrically placed with their opposite sides being inclined surfaces. The mounting block (401) has a vertically opened second cavity (405) for placing and guiding the sliding pressing block (403). The second cavity (405) is connected to the first cavity (404). The bottom of the sliding pressing block (403) is trapezoidal, and its two inclined sides respectively fit against the opposite sides of the left and right limiting blocks (402). The opposite sides of the limiting block (402) are provided with T-shaped grooves (406). The two inclined sides of the trapezoidal body are provided with T-shaped sliders (407) corresponding to the T-shaped grooves (406). The T-shaped sliders (407) are used to cooperate with the T-shaped grooves (406) to guide the sliding extrusion block (403) to move vertically up and down. The upper end of the sliding extrusion block (403) is connected to the lower end of the thin rope (8), and is used to move upward under the pull of the thin rope (8) when the roller shutter door panel slides down abnormally, so that the two limiting blocks (402) respectively extrude the two sides inside the roller shutter door frame and brake the roller shutter door panel through pressure and friction. The side of the limiting block (402) that contacts the roller shutter door frame is provided with an anti-slip rubber sheet to increase friction.

3. The electric roller shutter door abnormal failure downward limiting device according to claim 2, characterized in that, Both T-shaped sliders (407) are provided with an arc-shaped elastic sheet (408) in the middle. The arc surface of the arc-shaped elastic sheet (408) is an outwardly convex surface. A connecting rod (409) is provided on the inner side of the arc-shaped elastic sheet (408). The connecting rod (409) is perpendicular to the side of the trapezoidal body, passes through the T-shaped slider (407), and extends to the inner side of the trapezoidal body. The connecting rod (409) can also slide on the inner side of the trapezoidal body. The connecting rod (409) is used to fix the arc-shaped elastic sheet (408). The limiting block (402) is provided with a groove (4010) corresponding to the arc-shaped elastic sheet (408) on the side near the sliding pressing block (403). The arc-shaped elastic sheet (408) is located on the lower surface of the limiting block (402) when the roller shutter door panel is running normally, and is used to limit the limiting block (402).

4. The electric roller shutter door abnormal failure downward limiting device according to claim 1, characterized in that, The preset limit speed of the centrifugal speed limiter (1) is the same as the speed of the electric roller shutter motor.

5. The electric roller shutter door abnormal failure downward limiting device according to claim 2, characterized in that, The force plate (3) has a through hole (6) that communicates with the second cavity (405). The top of the sliding extrusion block (403) is provided with a reset ring (7) located inside the through hole (6). After the limiting component (4) is activated, it can pull the sliding extrusion block (403) down to reset by pulling down the reset ring (7). The sliding extrusion block (403) drives the limiting block (402) to reset.

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