A roller shutter door opening and closing signal acquisition device based on mechanical limit switch

Abstract

The application discloses a roller shutter door switch signal acquisition device based on a mechanical limit switch, which comprises a roller shutter door, an upper limit switch, a lower limit switch and a control system. One side of the roller shutter door is a wall surface for fixing the upper limit switch and the lower limit switch, and the upper limit switch is above the lower limit switch. A limit block is fixed on the roller shutter door, and the movement of the roller shutter door drives the limit block to move up and down, so as to touch the upper limit switch or the lower limit switch. When the roller shutter door is completely opened, the upper limit switch is triggered by the touch of the limit block. When the roller shutter door is completely closed, the lower limit switch is triggered by the touch of the limit block. The control system is electrically connected with the upper limit switch, the lower limit switch and the opening and closing device of the roller shutter door, and is used for receiving the trigger signals of the upper limit switch and the lower limit switch, so as to control the opening and closing of the roller shutter door. The application is less affected by environmental factors such as electromagnetic interference, dust and humidity, and is also suitable for the field of unmanned operation.

Description

Technical Field

[0001] This application relates to the field of roller shutter door control technology, specifically to a roller shutter door switch signal acquisition device based on a mechanical limit switch. Background Technology

[0002] In the current technological context, automated control of roller shutter doors is an indispensable part of industrial and civil facilities, aiming to provide a convenient and safe means of passage. Roller shutter doors are typically electrically driven to achieve rapid opening and closing, especially in large warehouses, garages, shopping malls, and other similar locations. However, the key to achieving this function lies in the accurate and reliable detection of the door's open / closed status.

[0003] For example, patent CN222106074U discloses a safety alarm device for an electric roller shutter door. Limit switches are set at the top and bottom of the roller shutter door frame, a trigger block is set on the roller shutter, and an operation box is set on the side of the roller shutter door. An alarm is set on the operation box. The upper limit switch and the lower limit switch are respectively connected to the alarm signal. When the roller shutter rises or falls, it drives the trigger block to rise or fall synchronously. If the trigger block does not trigger the upper limit switch or the lower limit switch, the alarm will sound.

[0004] However, the alarms used in the above technologies rely on photoelectric sensors, which are easily affected by dust, debris, or insects, especially in harsh environments and unmanned operation areas, which greatly limits their effectiveness. Utility Model Content

[0005] Therefore, this application provides a roller shutter door switch signal acquisition device based on a mechanical limit switch to solve the problems of existing sensors being easily affected by environmental interference and relying on manual operation.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A roller shutter door switch signal acquisition device based on a mechanical limit switch includes a roller shutter door, an upper limit switch, a lower limit switch, and a control system; one side of the roller shutter door is a wall surface for fixing the upper limit switch and the lower limit switch, and the upper limit switch is located above the lower limit switch.

[0008] The roller shutter door is fixed with a limit block. The roller shutter door moves to drive the limit block to move up and down, thereby touching the upper limit switch or the lower limit switch. When the roller shutter door is fully open, the upper limit switch is triggered by the contact of the limit block. When the roller shutter door is fully closed, the lower limit switch is triggered by the contact of the limit block.

[0009] The control system is electrically connected to the upper limit switch, the lower limit switch, and the opening and closing device of the roller shutter door. The control system is used to receive the trigger signals of the upper limit switch and the lower limit switch, and then control the opening and closing of the roller shutter door.

[0010] The limiting block includes a protruding part and a fixed part; the fixed part has two parts and is fixed on the upper and lower sides of the protruding part respectively, and the fixed part is connected to the roller shutter door by bolts; the protruding part bends and protrudes to the side away from the roller shutter door so as to extend beyond the surface of the roller shutter door, and when the limiting block moves up and down, the protruding part can touch the upper limit switch and the lower limit switch.

[0011] Optionally, the limiting block is fixed to the surface of the roller shutter door near the bottom.

[0012] Optionally, the wall surface is perpendicular to the surface of the roller shutter door.

[0013] Optionally, both the upper limit switch and the lower limit switch are fixed to the wall by bolts.

[0014] Optionally, both the upper limit switch and the lower limit switch include a housing, a trigger rod, a rotating shaft, a stop block with a return spring, and a micro switch; the stop block with the return spring and the micro switch are both located inside the housing, and the stop block with the return spring is movable; the rotating shaft is rotatably connected to the outside of the housing, the trigger rod is fixed on the rotating shaft, and the rotating shaft rotates to push the stop block with the return spring closer to and activate the micro switch;

[0015] The micro switch is electrically connected to the control system, and the end of the trigger rod can contact the limit block.

[0016] Optionally, a rotating block is fixed on the rotating shaft, and the trigger rod is slidably connected to the rotating block; an adjustment groove is provided on the trigger rod along its own length direction, and a locking bolt is provided on the rotating block. The locking bolt passes through the adjustment groove and can slide along the adjustment groove. The locking bolt rotates to restrict itself from sliding in the adjustment groove.

[0017] Optionally, the end of the trigger rod is provided with a contact, which is rotatably connected to the trigger rod.

[0018] Compared with the prior art, this application has at least the following beneficial effects:

[0019] The mechanical switching method ensures that the upper and lower limit switches are triggered only when the roller shutter door is fully open or closed, respectively. This reduces the impact of environmental factors such as electromagnetic interference, dust, and humidity. Moreover, the technical objectives can be achieved even in unmanned operation environments. The structure is simple and the cost is low. Attached Figure Description

[0020] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0021] Figure 1 A schematic diagram of a roller shutter door switch signal acquisition device based on a mechanical limit switch provided in an embodiment of this application;

[0022] Figure 2 A partial structural schematic diagram of a roller shutter door switch signal acquisition device based on a mechanical limit switch provided in an embodiment of this application;

[0023] Figure 3 A partial structural schematic diagram of a roller shutter door switch signal acquisition device based on a mechanical limit switch provided in an embodiment of this application;

[0024] Figure 4 for Figure 1 A schematic diagram of the upper limit switch and the lower limit switch.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Roller shutter door; 2. Upper limit switch; 3. Lower limit switch; 4. Wall; 5. Limit block; 6. Protrusion; 7. Fixing part; 8. Box body; 9. Trigger rod; 10. Rotating shaft; 11. Stop block with return spring; 12. Micro switch; 13. Rotating block; 14. Adjustment groove; 15. Contact. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0029] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0030] A device for acquiring the opening and closing signal of a roller shutter door based on a mechanical limit switch, referring to... Figures 1-3 The system includes a roller shutter door 1, an upper limit switch 2, a lower limit switch 3, and a control system. One side of the roller shutter door 1 is a wall 4 for fixing the upper limit switch 2 and the lower limit switch 3. This wall 4 is perpendicular to the plane where the roller shutter door 1 is located, allowing the upper limit switch 2 and the lower limit switch 3 to face the roller shutter door 1. Both the upper limit switch 2 and the lower limit switch 3 are fixed to the wall 4 with bolts.

[0031] A limit block 5 is fixed on the roller shutter door 1. The movement of the roller shutter door 1 causes the limit block 5 to move up and down, thereby contacting the upper limit switch 2 or the lower limit switch 3. Specifically, the limit block 5 is fixed on the surface of the roller shutter door 1 near the bottom. The upper limit switch 2 is located above the lower limit switch 3 and is used to trigger a signal when the roller shutter door 1 is in different positions.

[0032] When the roller shutter door 1 is fully open, the upper limit switch 2 is triggered by the contact of the limit block 5; when the roller shutter door 1 is fully closed, the lower limit switch 3 is triggered by the contact of the limit block 5.

[0033] Furthermore, the control system is electrically connected to the upper limit switch 2, the lower limit switch 3, and the opening and closing device of the roller shutter door 1. The control system receives trigger signals from the upper limit switch 2 and the lower limit switch 3, thereby controlling the opening and closing of the roller shutter door 1. Therefore, when the roller shutter door 1 is in a fully closed or fully open state, the control system can close the opening and closing device of the roller shutter door 1 to stop the lowering of the roller shutter door 1 upon receiving a signal from the lower limit switch 3. It can also close the opening and closing device of the roller shutter door 1 to stop the retraction of the roller shutter door 1 upon receiving a signal from the upper limit switch 2. This ensures that transport vehicles inside and outside the roller shutter door 1 only pass when the roller shutter door 1 is fully open, effectively preventing collisions between them.

[0034] Regarding the installation of the limit block 5: The limit block 5 includes a protrusion 6 and two fixing parts 7. Both fixing parts 7 are flat and are fixed to the upper and lower sides of the protrusion 6 respectively. The fixing parts 7 are connected to the roller shutter door 1 by bolts and are in close contact with the roller shutter door 1. The protrusion 6 bends and protrudes away from the roller shutter door 1, forming a concave structure extending beyond the surface of the roller shutter door 1. When the limit block 5 moves up and down, the protrusion 6 can contact the upper limit switch 2 and the lower limit switch 3.

[0035] Reference Figure 4The upper limit switch 2 and the lower limit switch 3 have the same structure, both including a housing 8, a trigger rod 9, a rotating shaft 10, a stop block 11 with a return spring, and a micro switch 12. The stop block 11 with the return spring and the micro switch 12 are both located inside the housing 8. The stop block 11 with the return spring is movable. When the stop block 11 with the return spring moves to touch the micro switch 12, it returns to its original position under the reset action of the spring.

[0036] The rotating shaft 10 is rotatably connected to the outside of the housing 8, and a protrusion is provided on it. The trigger rod 9 is fixed on the rotating shaft 10. After the trigger rod 9 contacts the limit block 5, it rotates. At this time, the rotating shaft 10 rotates, and the protrusion on it pushes the stop block 11 with a reset spring to approach and activate the micro switch 12, thereby sending a signal.

[0037] The micro switch 12 is electrically connected to the control system. The end of the trigger rod 9 can contact the limit block 5, and this end is provided with a rotatable contact 15.

[0038] Furthermore, a rotating block 13 is fixed on the rotating shaft 10, and the trigger rod 9 is slidably connected to the rotating block 13. An adjustment groove 14 is formed on the trigger rod 9 along its length. A locking bolt passes through the rotating block 13, through the adjustment groove 14, and can slide along the groove. The locking bolt rotates to restrict its own sliding within the adjustment groove 14. Therefore, by adjusting the relative position of the rotating block 13 and the adjustment groove 14, the distance between the trigger rod 9 and the roller shutter door 1 can be adjusted. This allows for fine adjustments to the position of the trigger rod 9 even after the limit switch is fixed to the wall 4.

[0039] In the embodiments of this application, the upper limit switch 2 and the lower limit switch 3 used are limit switch structures that are used in the prior art, so they are only briefly described here.

[0040] The implementation principle of this application embodiment is as follows: when the roller shutter door 1 opens upward, the limit block 5 rises to touch the contact 15 of the upper limit switch 2, then the upper limit switch 2 closes and outputs an electrical signal that the roller shutter door 1 has opened to the correct position.

[0041] When the roller shutter door 1 closes downwards, the limit block 5 descends until it touches the contact 15 of the lower limit switch 3, then the lower limit switch 3 closes and outputs an electrical signal indicating that the roller shutter door 1 is closed.

[0042] After the electrical signal is transmitted to the control system, the control system can read the current status of the roller shutter door 1 and issue subsequent commands. For example, in a prefabricated cabin used by an unmanned vehicle, when the control system reads the electrical signal that the roller shutter door 1 is fully open, the control system issues an action command to the unmanned vehicle inside the cabin, allowing the unmanned vehicle to safely exit the prefabricated cabin without scraping against the roller shutter door 1. Or, when the control system reads the electrical signal that the roller shutter door 1 is fully closed, it confirms that the unmanned vehicle has successfully returned to the cabin and can proceed to the next step, such as charging.

[0043] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A device for acquiring the switch signal of a roller shutter door (1) based on a mechanical limit switch, characterized in that: It includes a roller shutter door (1), an upper limit switch (2), a lower limit switch (3) and a control system; one side of the roller shutter door (1) is a wall (4) for fixing the upper limit switch (2) and the lower limit switch (3), and the upper limit switch (2) is located above the lower limit switch (3); A limit block (5) is fixed on the roller shutter door (1). The roller shutter door (1) moves to drive the limit block (5) to move up and down, thereby touching the upper limit switch (2) or the lower limit switch (3). When the roller shutter door (1) is fully open, the upper limit switch (2) is triggered by the contact of the limit block (5). When the roller shutter door (1) is fully closed, the lower limit switch (3) is triggered by the contact of the limit block (5). The control system is electrically connected to the upper limit switch (2), the lower limit switch (3) and the opening and closing device of the roller shutter door (1). The control system is used to receive the trigger signals of the upper limit switch (2) and the lower limit switch (3) and then control the opening and closing of the roller shutter door (1). The limiting block (5) includes a protrusion (6) and a fixing part (7); the fixing part (7) is provided in two parts and is fixed on the upper and lower sides of the protrusion (6) respectively, and the fixing part (7) is connected to the roller shutter door (1) by bolts; the protrusion (6) bends and protrudes to the side away from the roller shutter door (1) so as to extend beyond the surface of the roller shutter door (1), and when the limiting block (5) moves up and down, the protrusion (6) can touch the upper limit switch (2) and the lower limit switch (3).

2. The roller shutter door (1) switch signal acquisition device based on a mechanical limit switch according to claim 1, characterized in that: The limiting block (5) is fixed on the surface of the roller shutter door (1) near the bottom.

3. The roller shutter door (1) switch signal acquisition device based on a mechanical limit switch according to claim 1, characterized in that: The wall surface (4) is perpendicular to the surface of the roller shutter door (1).

4. The roller shutter door (1) switch signal acquisition device based on a mechanical limit switch according to claim 1, characterized in that: The upper limit switch (2) and the lower limit switch (3) are both fixed to the wall (4) by bolts.

5. The roller shutter door (1) switch signal acquisition device based on a mechanical limit switch according to claim 1, characterized in that: The upper limit switch (2) and the lower limit switch (3) each include a housing (8), a trigger rod (9), a rotating shaft (10), a stop block (11) with a return spring, and a micro switch (12); the stop block (11) with a return spring and the micro switch (12) are both located inside the housing (8), and the stop block (11) with a return spring is movable; the rotating shaft (10) is rotatably connected to the outside of the housing (8), the trigger rod (9) is fixed on the rotating shaft (10), and the rotating shaft (10) rotates to push the stop block (11) with a return spring closer to and activate the micro switch (12); The micro switch (12) is electrically connected to the control system, and the end of the trigger rod (9) can contact the limit block (5).

6. The roller shutter door (1) switch signal acquisition device based on a mechanical limit switch according to claim 5, characterized in that: A rotating block (13) is fixed on the rotating shaft (10), and the trigger rod (9) is slidably connected to the rotating block (13). An adjustment groove (14) is provided on the trigger rod (9) along its own length direction. A locking bolt is provided on the rotating block (13). The locking bolt passes through the adjustment groove (14) and can slide along the adjustment groove (14). The locking bolt rotates to restrict itself from sliding in the adjustment groove (14).

7. The roller shutter door (1) switch signal acquisition device based on a mechanical limit switch according to claim 5 or 6, characterized in that: The end of the trigger rod (9) is provided with a contact (15), which is rotatably connected to the trigger rod (9).

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