Warm shed curtain running limiting device

Abstract

The utility model discloses a greenhouse roller blind operation limiting device relates to greenhouse supporting equipment technical field, including fixed seat and L shape mounting plate, the inner wall rotation of fixed seat is connected with rotating shaft, the surface fixed connection of rotating shaft has movable support frame, the upper surface mounting of movable support frame has steel bar, one end fixed connection of steel bar has greenhouse roller blind shaft, the surface fixed connection of L shape mounting plate has proximity switch and travel switch. The utility model realizes double limit, safe and reliable, and proximity switch constitutes soft limit, can in advance inductive steel bar position, makes control system reduce drive speed, avoids roller blind inertia impact, and travel switch cooperates mechanical limiting rod and constitutes mechanical limiting, when soft limit is invalid, and steel bar touches mechanical limiting rod and touches travel switch, and forces drive shutdown, and proximity switch and travel switch cooperate and reduce the failure risk, prevent greenhouse roller blind excessive operation damage.

Description

Technical Field

[0001] This utility model relates to the technical field of greenhouse supporting equipment, and in particular to a greenhouse roller shutter operation limit device. Background Technology

[0002] In greenhouse cultivation, greenhouse roller shutters are key equipment for regulating temperature, light, and humidity inside the greenhouse, and their operational stability directly affects greenhouse cultivation efficiency and crop growth environment. With the development of modern large-scale agriculture, the automation level of greenhouse roller shutters is constantly improving. The drive mechanism mostly uses a motor to drive the shutter shaft, realizing the automatic opening and closing of the shutter.

[0003] The current greenhouse roller shutter device uses a single limiting structure, and most of them use mechanical limiting structures. If only pure mechanical limiting is relied upon, there is a lack of early warning and deceleration mechanism. When the roller shutter runs to the limit position, it will directly and rigidly collide with the mechanical parts. At the same time, frequent impacts can easily cause deformation of the roller shutter shaft and loosening of connecting parts, increasing equipment maintenance costs and downtime for repair.

[0004] To address this, we designed a greenhouse roller shutter operation limit device. Utility Model Content

[0005] This utility model discloses a greenhouse roller shutter operation limiting device. In order to achieve the above-mentioned objective, this utility model adopts the following technical solution:

[0006] The greenhouse roller shutter running limit device includes a fixed base and an L-shaped mounting plate. The inner wall of the fixed base is rotatably connected to a rotating shaft. A movable support frame is fixedly connected to the surface of the rotating shaft. A steel rod is installed on the upper surface of the movable support frame. One end of the steel rod is fixedly connected to the greenhouse roller shutter shaft. A proximity switch and a limit switch are fixedly connected to the surface of the L-shaped mounting plate.

[0007] In a preferred embodiment, the sensing end of the proximity switch extends to the other side of the L-shaped mounting plate, and the position of the sensing end of the proximity switch corresponds to that of the steel rod.

[0008] In a preferred embodiment, a mechanical limit rod is fixedly connected to the surface of the limit switch, and the mechanical limit rod is located above the steel rod.

[0009] In a preferred embodiment, the surface of the rotating shaft also has a return torsion spring, one end of which is fixedly connected to the inner side of the fixed base, and the other end of which is fixedly connected to the surface of the movable support frame. The return torsion spring is used to reset the position of the steel bar.

[0010] In a preferred embodiment, a first clamp is fixedly connected to the side of the mounting base, and a second clamp is fixedly connected to the surface of the L-shaped mounting plate. Both the first clamp and the second clamp are fixedly connected to the top of the tower rod by bolts.

[0011] In a preferred embodiment, the upper surface of the movable support frame is provided with a plurality of bolt fixing holes, the inner wall of the bolt fixing holes is threaded with limit bolts, the surface of the limit bolts is fitted with limit plates, and the steel rod is fixedly installed on the surface of the movable support frame by the limit plates and the limit bolts.

[0012] As can be seen from the above, the greenhouse roller shutter operation limiting device provided by this utility model has the following technical effects.

[0013] 1. This utility model achieves dual limit, which is safe and reliable. The proximity switch constitutes a soft limit, which can sense the position of the steel bar in advance, allowing the control system to reduce the driving speed and avoid the inertial impact of the rolling curtain. The limit switch, together with the mechanical limit rod, constitutes a mechanical limit. When the soft limit fails, the steel bar touches the mechanical limit rod and triggers the limit switch, forcibly driving the machine to stop. The proximity switch and the limit switch work together to reduce the risk of failure and prevent the greenhouse rolling curtain from being damaged by excessive operation.

[0014] 2. This utility model can automatically reset the steel rod by setting a reset torsion spring, reducing manual operation; the first clamp and the second clamp are connected to the tower rod by bolts without damaging the tower rod, and can also be adapted to different greenhouse supports; the bolt fixing holes of the movable support frame can adjust the installation of the steel rod to adapt to different roller shutter specifications. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the greenhouse roller shutter operation limiting device proposed in this utility model.

[0016] Figure 2 This is a top view of the greenhouse roller shutter operation limiting device proposed in this utility model.

[0017] Figure 3 This is a frontal cross-sectional schematic diagram of the greenhouse roller shutter operation limiting device proposed in this utility model.

[0018] Figure 4 This is a side view of the greenhouse roller shutter operation limiting device proposed in this utility model.

[0019] In the attached diagram: 1. Fixed base; 2. L-shaped mounting plate; 3. Rotating shaft; 4. Movable support frame; 5. Steel rod; 6. Greenhouse roller shutter shaft; 7. Proximity switch; 8. Limit switch; 9. Mechanical limit rod; 10. First clamp; 11. Second clamp; 12. Limit plate; 13. Return torsion spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figures 1-4 The greenhouse roller shutter running limit device includes a fixed base 1, an L-shaped mounting plate 2, a rotating shaft 3, a movable support frame 4, a steel rod 5, a greenhouse roller shutter shaft 6, a proximity switch 7, a limit switch 8, a mechanical limit rod 9, a first clamp 10, a second clamp 11, a limit plate 12, and a reset torsion spring 13.

[0022] It is worth noting that the fixed base 1, as the basic support component of the device, has its inner wall rotatably connected to the rotating shaft 3, allowing the rotating shaft 3 to rotate freely around the inner wall of the fixed base 1. The movable support frame 4 is fixedly connected to the surface of the rotating shaft 3 and moves synchronously with the rotation of the rotating shaft 3, forming a linkage structure that provides support for the subsequent installation and movement of the steel rod 5 and the greenhouse roller shutter shaft 6.

[0023] It is worth noting that the upper surface of the movable support frame 4 has several bolt fixing holes. The limiting bolts are threaded into the inner wall of the bolt fixing holes, and the limiting plate 12 is fitted onto the surface of the limiting bolts. The steel rod 5 is stably installed on the surface of the movable support frame 4 through the cooperation of the limiting plate 12 and the limiting bolts. The limiting plate 12 and the limiting bolts work together to prevent the steel rod 5 from shifting or falling off during operation. The greenhouse curtain shaft 6 is fixedly connected to one end of the steel rod 5. When the steel rod 5 moves with the movable support frame 4, the greenhouse curtain shaft 6 moves synchronously, thereby driving the greenhouse curtain to open or close.

[0024] It is worth noting that both the proximity switch 7 and the limit switch 8 are fixedly connected to the surface of the L-shaped mounting plate 2, and are installed in a certain distribution to jointly achieve the limiting function. The sensing end of the proximity switch 7 extends to the other side of the L-shaped mounting plate 2, and its position corresponds to that of the steel rod 5, ensuring that the proximity switch 7 can accurately sense changes in the position of the steel rod 5. A mechanical limit rod 9 is fixedly connected to the surface of the limit switch 8, located above the steel rod 5. When the steel rod 5 moves to a specific position, it can contact the mechanical limit rod 9, triggering the limit switch 8.

[0025] The proximity switch 7 forms a soft limit, which can sense the position of the steel rod 5 in advance, allowing the control system to reduce the drive speed and avoid the inertial impact of the rolling shutter. The limit switch 8, together with the mechanical limit rod 9, forms a mechanical limit. When the soft limit fails, the steel rod 5 touches the mechanical limit rod 9 to trigger the limit switch 8, forcibly driving the machine to stop. The proximity switch 7 and the limit switch 8 work together to reduce the risk of failure and prevent the greenhouse rolling shutter from being damaged by excessive operation.

[0026] It should be noted that the return torsion spring 13 is sleeved on the surface of the rotating shaft 3, with one end fixedly connected to the inner side of the fixed base 1 and the other end fixedly connected to the surface of the movable support frame 4. The return torsion spring 13 is always in a certain preload state. When the movable support frame 4 deviates from its initial position as the rotating shaft 3 rotates, the return torsion spring 13 can use the restoring force generated by its own elastic deformation to drive the movable support frame 4 and the rotating shaft 3 back to their initial positions, thereby achieving the reset of the position of the steel rod 5. The return torsion spring 13 can drive the steel rod 5 to automatically reset, reducing manual operation.

[0027] It should be further explained that the first clamp 10 is fixedly connected to the side of the fixed base 1, and the second clamp 11 is fixedly connected to the surface of the L-shaped mounting plate 2. Both the first clamp 10 and the second clamp 11 are fixedly connected to the top of the tower rod by bolts. Through this connection method, the entire greenhouse curtain operation limiting device is stably installed on the top of the tower rod, ensuring the stability of the overall structure of the device during operation and preventing the device from shifting due to external factors, which would affect the limiting effect.

[0028] The first clamp 10 and the second clamp 11 are connected to the tower rod by bolts without damaging the tower rod, and can also be adapted to different greenhouse supports; the bolt fixing holes of the movable support frame 4 can be used to adjust the installation of the steel rod 5, and can be adapted to different roller shutter specifications.

[0029] Working principle: When the greenhouse shutter closes, the relevant drive mechanism drives the greenhouse shutter shaft 6 downward. When the greenhouse shutter is almost fully closed, the greenhouse shutter shaft 6 contacts the steel rod 5. At this time, the greenhouse shutter shaft 6 continues to press down, driving the steel rod 5 to move synchronously. The steel rod 5 then drives the movable support frame 4 and the rotating shaft 3 to rotate around the inner wall of the fixed base 1. During this process, the return torsion spring 13 sleeved on the surface of the rotating shaft 3 undergoes elastic deformation due to the rotation of the rotating shaft 3, gradually storing elastic potential energy.

[0030] As the steel rod 5 continues to move, when it approaches the proximity switch 7, the steel rod 5 moves into the sensing range of the proximity switch 7 because the sensing end of the proximity switch 7 corresponds to the position of the steel rod 5. At this time, the proximity switch 7 sends a signal to the control system. After receiving the signal, the control system issues a stop command to the roller shutter drive motor, at which point the greenhouse roller shutter is fully closed. If the drive mechanism fails to stop in time due to a malfunction or other reasons, the steel rod 5 will continue to move and contact the mechanical limit rod 9 located above it. After the mechanical limit rod 9 is subjected to the force of the steel rod 5, it transmits the force to the limit switch 8 fixedly connected to it, triggering the limit switch 8 to operate. After the limit switch 8 operates, it sends a stop signal. After receiving this signal, the control system immediately cuts off the power source of the drive mechanism, forcing the drive mechanism to stop, thereby ensuring that the greenhouse roller shutter will not exceed the unfolding limit position, achieving the purpose of double limiting.

[0031] When the greenhouse shutter needs to be opened, the drive mechanism reverses, causing the greenhouse shutter shaft 6, steel rod 5, movable support frame 4, and rotating shaft 3 to rotate in the opposite direction. At this time, the reset torsion spring 13 releases the previously stored elastic potential energy, and the restoring force it generates assists the movable support frame 4 and steel rod 5 in rotating. When the greenhouse shutter shaft 6 continues to move upward and disengages from the contact steel rod 5, the entire greenhouse shutter closing limit device returns to its initial state, preparing for the next shutter closure.

[0032] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A greenhouse roller shutter running limit device, comprising a fixed base (1) and an L-shaped mounting plate (2), characterized in that, The inner wall of the fixed base (1) is rotatably connected to a rotating shaft (3), and a movable support frame (4) is fixedly connected to the surface of the rotating shaft (3). A steel rod (5) is installed on the upper surface of the movable support frame (4), and a greenhouse roller shutter shaft (6) is fixedly connected to one end of the steel rod (5). A proximity switch (7) and a limit switch (8) are fixedly connected to the surface of the L-shaped mounting plate (2).

2. The greenhouse roller shutter running limit device according to claim 1, characterized in that, The sensing end of the proximity switch (7) extends to the other side of the L-shaped mounting plate (2), and the position of the sensing end of the proximity switch (7) corresponds to that of the steel rod (5).

3. The greenhouse roller shutter running limit device according to claim 2, characterized in that, A mechanical limit rod (9) is fixedly connected to the surface of the limit switch (8), and the mechanical limit rod (9) is located above the steel rod (5).

4. The greenhouse roller shutter running limit device according to claim 1, characterized in that, The surface of the rotating shaft (3) also has a reset torsion spring (13). One end of the reset torsion spring (13) is fixedly connected to the inner side of the fixed seat (1), and the other end of the reset torsion spring (13) is fixedly connected to the surface of the movable support frame (4). The reset torsion spring (13) is used to reset the position of the steel rod (5).

5. The greenhouse roller shutter running limit device according to claim 4, characterized in that, The side of the fixed base (1) is fixedly connected to a first clamp (10), and the surface of the L-shaped mounting plate (2) is fixedly connected to a second clamp (11). Both the first clamp (10) and the second clamp (11) are fixedly connected to the top of the tower rod by bolts.

6. The greenhouse roller shutter running limit device according to claim 5, characterized in that, The upper surface of the movable support frame (4) is provided with several bolt fixing holes. The inner wall of the bolt fixing holes is threaded with limit bolts. The surface of the limit bolts is fitted with limit plates (12). The steel rod (5) is fixedly installed on the surface of the movable support frame (4) through the limit plates (12) and the limit bolts.

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