An automatic door in-place detection device and method for intelligent construction elevators

Abstract

The application discloses a kind of intelligent construction hoist automatic door in-place detection device and detection method, including control panel, drive mechanism and stroke limiter being installed at the top of cage and cage door being installed at the entrance of cage stop layer, counterweight is respectively arranged at the both sides of cage door, chain is respectively engaged and arranged in vertical direction at the both ends of drive mechanism, one end of chain is connected with counterweight, the other end of chain is connected by with lower end side of cage door, output shaft of stroke limiter is drivingly connected with drive mechanism, control panel is electrically connected with stroke limiter and drive mechanism respectively;The application drives the operation of cage by drive mechanism, so that when cage door is about to enter completely open or completely closed state, control panel detects whether stroke limiter is triggered to close in place action.The application improves the safety performance of automatic door in opening and closing, reduces the failure rate of automatic door.

Description

Technical Field

[0001] This invention relates to the field of construction hoist technology, and in particular to an intelligent construction hoist automatic door positioning detection device and detection method. Background Technology

[0002] The loading and unloading doors of the intelligent construction hoist cage are motor-driven automatic doors, requiring no manual operation. When the cage reaches and stops at the bottom floor, the loading door opens automatically, allowing workers to load materials into the cage. Pressing the target floor button triggers the unloading door, which opens automatically when the cage reaches that floor, enabling workers to load materials onto that floor. Currently, limit switches are commonly used to restrict the automatic doors' opening and closing positions. Figure 1 As shown, after the automatic cage door opens (closes), the limit switch's contact rod enters the limit slot on the automatic cage door, transmitting the closed (open) signal to the control system. The disadvantage of the above technology is:

[0003] 1. The limit switch slots of automatic cage doors require high precision in manufacturing and installation; otherwise, the limit switch contact rods may become stuck, jammed, or unable to smoothly enter the limit switch slots.

[0004] 2. The automatic door of the hanging cage may cause the limit switch contact rod to loosen due to prolonged pressure and vibration during opening and closing, leading to the limit switch malfunction.

[0005] 3. In the above situation, the signals for the door being closed and open cannot be transmitted back to the control system, making it impossible to stop the drive door motor. This poses a risk of breaking the drive chain and is a very serious safety hazard. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic door positioning detection device and method for intelligent construction hoists. This invention provides dual protection to improve the safety performance of the automatic door during opening and closing; it also improves the accuracy of the automatic door's opening and closing positioning, reduces the failure rate of the automatic door, and improves the working efficiency of the hoist. To achieve the above objectives, this invention employs the following technical effects:

[0007] According to one aspect of the present invention, an automatic door positioning detection device for an intelligent construction hoist is provided. The positioning detection device includes a control panel, a transmission mechanism and a travel limiter installed on the top of the hoist cage, and a hoist cage door installed at the entrance / exit of the hoist cage at each floor. Counterweights are respectively provided on both sides of the hoist cage door. Chains are respectively meshed at both ends of the transmission mechanism in the vertical direction. One end of the chain is connected to the counterweight, and the other end of the chain is connected to the lower side of the hoist cage door. The output shaft of the travel limiter is drivenly connected to the transmission mechanism. The control panel is electrically connected to the travel limiter and the transmission mechanism respectively.

[0008] In a further preferred embodiment of the above scheme, the transmission mechanism includes a drive motor, a reduction motor, a power transmission shaft, and sprockets. The power transmission shaft is connected in series at the top of the cage above the cage door, and is parallel to the top of the cage door. The drive motor is located at the center of the top of the cage. The output shaft of the drive motor is connected to the input and output ends of the reduction motor. The output shafts at both ends of the reduction motor are connected in series with the power transmission shaft via flanges. Sprockets are located at both ends of the power transmission shaft and on the outer side of the top of the cage. A chain is mounted on the sprockets. One end of the chain is connected to the counterweight, and the other end of the chain is connected to the lower side of the cage door via a connector. A first gear is mounted on the power transmission shaft between the flanges and the sprockets, and the first gear is connected to the travel limiter.

[0009] In a further preferred embodiment of the above scheme, the travel limiter includes a limit housing, a limit drive shaft, mechanical contact blocks, and touch switches. One end of the limit drive shaft is fixed inside the limit housing, and the other end of the limit drive shaft extends out of the limit housing and is provided with a second gear that meshes with the first gear. Multiple mechanical contact blocks connected to the limit drive shaft are provided inside the limit housing. A corresponding touch switch is provided on the opposite side of each mechanical contact block. When the limit drive shaft drives the mechanical contact block to rotate to the side of the touch switch, the contact point on each touch switch contacts the corresponding mechanical contact block. The control panel is electrically connected to the output terminal of the touch switch and the drive motor.

[0010] In a further preferred embodiment of the above scheme, support seats are provided on both sides of the top of the cage above the cage door, and the two ends of the power transmission shaft are mounted on the support seats through bearing seats.

[0011] In a further preferred embodiment of the above scheme, connecting sleeves are respectively provided on the output shafts at both ends of the geared motor, and the flange is connected to the output shafts at both ends of the geared motor through the connecting sleeves.

[0012] In a further preferred embodiment of the above scheme, guide wheels are provided on both sides of the top of the cage door, and the guide wheels are connected to the top of the cage. Control buttons, an alarm and a PLC controller are provided on the control panel, and the control buttons, alarm, travel limit switch and transmission mechanism are electrically connected to the PLC controller.

[0013] According to another aspect of the present invention, the present invention provides a method for detecting the position of an automatic door of an intelligent construction hoist. The method includes the following steps: setting the trigger stroke of a travel limit switch; driving the hoist cage through a transmission mechanism; when the hoist cage door is about to enter a fully open or fully closed state, the control panel detects whether the travel limit switch has been triggered to close; the control panel receives a switch signal to open or close the hoist cage door; determines the running position of the hoist cage door based on the switch signal; determines whether the running position has reached a preset running range; if it has reached the running range, the transmission mechanism is stopped, and the hoist cage door opening or closing process is completed.

[0014] In a further preferred embodiment of the above scheme, when the control panel receives a switch signal indicating that the cage door needs to be opened, it drives the cage door to rise on the cage via a transmission mechanism. If the control panel detects that the travel limit switch has been triggered and closed, it generates a limit switch signal and outputs it to the control panel.

[0015] The control panel outputs a stop signal to stop the drive motor from rotating, completing the process of opening the cage door.

[0016] When the control panel receives a switch signal to close the cage door, it drives the cage door to descend on the cage via the transmission mechanism. If the control panel detects that the travel limit switch has been triggered and closed, it generates a limit switch signal and outputs it to the control panel. The control panel outputs a stop signal to control the transmission motor to stop rotating, thus completing the cage door closing process.

[0017] 0. In a further preferred embodiment of the above scheme, when the control panel receives a switch signal indicating that the cage door needs to be opened...

[0018] When the control panel outputs a forward rotation control signal to control the drive motor to rotate forward, the drive shaft and chain will drive the cage door to slide upward along the guide wheel, and the counterweight will descend freely under the drive of the chain, raising the cage door to the preset height;

[0019] When the cage door is raised to the preset height and fully opened, during the process of the first gear driving the second gear to rotate, a pre-set touch switch in the travel limit switch is triggered. At this time, the control panel detects and...

[0020] Upon receiving a limit switch signal, the control panel will stop the drive motor from rotating, thus completing the process of opening the cage door.

[0021] When the control panel receives a switch signal indicating that the cage door needs to be closed, it outputs a reverse control signal to reverse the drive motor, driving the power transmission shaft and chain to slide the cage door downwards along the guide wheel. The counterweight rises freely under the chain's influence, causing the cage door to descend and close.

[0022] When the cage door is fully closed, during the rotation of the second gear driven by the first gear, a pre-set touch switch in the travel limit switch is triggered. At this time, the control panel detects and receives a limit switch signal, and then the control panel controls the drive motor to stop rotating, thus completing the cage door closing process.

[0023] In a further preferred embodiment of the above scheme, if the cage door is not fully open or fully closed, and the control panel detects that the travel limit switch has been triggered to close or has not been triggered to close, and the running position has not reached the preset running range, the control panel will issue an alarm signal.

[0024] In summary, the present invention adopts the above technical solution, and the present invention has the following technical effects:

[0025] (1) This invention solves the problem that the opening and closing signals of the automatic door of the intelligent construction hoist cannot be transmitted back to the system.

[0026] The dual protection system enhances the safety performance of automatic doors during opening and closing; it also improves the accuracy of automatic doors in terms of opening and closing, reducing the failure rate of automatic doors and increasing the working efficiency of elevators.

[0027] (2) The building device of the present invention has multiple switch contacts (multiple strokes) built into the limit switch, which can make full use of all its contacts to form multiple protections, reduce the failure rate of automatic doors, and can solve the open and close position signals at the same time, greatly improving the efficiency of installation and debugging. Attached Figure Description

[0028] Figure 1 This is a state diagram of the existing hoist cage automatic door when it is in position and closed;

[0029] Figure 2 This is a side view structural schematic diagram of an intelligent construction hoist automatic door positioning detection device according to the present invention;

[0030] Figure 3 This is a schematic diagram of the transmission mechanism of the present invention;

[0031] Figure 4 This is a schematic diagram of the detection principle of an intelligent construction hoist automatic door positioning detection device according to the present invention;

[0032] Figure 5 This is a schematic diagram of the travel limiter of the present invention;

[0033] Figure 6 This is a state diagram of the intelligent construction hoist automatic door of the present invention when it is fully open;

[0034] Figure 7 This is a state diagram of the intelligent construction hoist automatic door of the present invention when it is fully closed;

[0035] In the attached diagram, the components are: cage 1, transmission mechanism 2, travel limiter 3, cage door 4, counterweight 5, chain 6, control panel 10, drive motor 21, geared motor 22, power transmission shaft 23, sprocket 24, flange 25, connecting sleeve 25a, first gear 26, support base 27, guide wheel 28, limit housing 30, limit transmission shaft 31, mechanical contact block 32, touch switch 33, contact 33a, output terminal 34, and second gear 35. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the present invention, and these aspects of the invention can be implemented even without these specific details.

[0037] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, according to a smart construction hoist automatic door positioning detection device of the present invention, the positioning detection device includes a control panel, a transmission mechanism 2 and a travel limiter 3 installed on the top of the hoist cage 1, and a hoist cage door 4 installed at the entrance / exit of the hoist cage at each floor. Counterweights 5 are respectively provided on both sides of the hoist cage door 4. Chains 6 are respectively meshed at both ends of the transmission mechanism 2 in the vertical direction. One end of each chain 6 is connected to the counterweight 5, and the other end of each chain 6 is connected to the lower side of the hoist cage door 4. The output shaft of the travel limiter 3 is drively connected to the transmission mechanism 2. The control panel is electrically connected to both the travel limiter and the transmission mechanism 2. Counterweights 5 are provided on both sides of the top of the hoist cage door 4. Guide wheels 28 are connected to the top two sides of the hoist cage 1. Control buttons, an alarm, and a PLC controller are located on the control panel. The control buttons, alarm, travel limit switch, and transmission mechanism 2 are electrically connected to the PLC controller. The hoist cage 1 is a major component of the construction hoist, installed on the standard section guide rails. During operation, it moves upwards or downwards along the guide rails, primarily transporting materials and construction personnel to each floor of the building. The hoist cage door 4 is installed on the cage structure and is a component of the cage. The hoist cage door 4 is connected to the chain via a connector. The chain 6 engages with the sprockets on the transmission mechanism 2. Figure 1 and Figure 3As shown. Its working process is as follows: the forward or reverse rotation of the transmission mechanism will drive the sprocket to rotate, the sprocket will then pull the chain to move, and the chain will pull up or down the cage door 4 to complete the opening or closing action. The travel limit device 3 is set in advance according to the opening travel height, and the contact of the travel limit device 3 is connected back to the control panel through the signal line.

[0038] In this invention, such as Figure 3 and Figure 4 As shown, the transmission mechanism 2 includes a drive motor 21, a reduction motor 22, a power transmission shaft 23, and a sprocket 24. The power transmission shaft 23 is connected in series at the top of the cage 1 above the cage door 4, and is parallel to the top of the cage door 4. The drive motor 21 is located at the center of the top of the cage 1. The output shaft of the drive motor 21 is connected to the input and output ends of the reduction motor 22. The output shafts at both ends of the reduction motor 22 are connected in series with the power transmission shaft 23 via flanges 25. The sprocket 24 is located at both ends of the power transmission shaft 23 and on the outer side of the top of the cage. A chain 6 is mounted on the sprocket 24. One end of the chain 6 is connected to the counterweight 5, and the other end of the chain 6 is connected to the cage door 4 via a connector. The lower side is connected, and a first gear 26 is provided on the power transmission shaft 23 between the flange 25 and the sprocket 24. The first gear 26 is connected to the travel limiter 3. Support seats 27 are provided on both sides of the top of the cage 1 above the cage door 4. The two ends of the power transmission shaft 23 are mounted on the support seats 27 through bearing seats 23a. Connecting sleeves 25a are respectively provided on the output shafts at both ends of the reduction motor 22. The flange 25 is sleeved on the output shafts at both ends of the reduction motor 22 through the connecting sleeves. When the transmission motor 21 is powered, it drives the reduction motor 22 to drive the power transmission shaft 23 and the sprocket 24 to rotate together. The chain 6 meshing on the sprocket 24 is pulled and moves accordingly. The chain 6 pulls up or down the cage door 4 to complete the opening or closing action.

[0039] In this invention, such as Figure 3 and Figure 5As shown, the travel limiter 3 includes a limit housing 30, a limit drive shaft 31, mechanical contact blocks 32, and a touch switch 33. One end of the limit drive shaft 31 is fixed inside the limit housing 30, and the other end of the limit drive shaft 31 extends out of the limit housing 30 and is provided with a second gear 35 that meshes with the first gear 26. Multiple mechanical contact blocks 32 connected to the limit drive shaft 31 are provided inside the limit housing 30. A corresponding touch switch 33 is provided on the opposite side of each mechanical contact block 32. When the limit drive shaft 31 drives the mechanical contact block 32 to rotate to the side of the touch switch 33, the contact point 33a on each touch switch 33 contacts the corresponding mechanical contact block 32. The control panel is electrically connected to the output terminal 34 of the touch switch 33 and the drive motor 21. Working process: When... Figure 2 When the drive motor 21 is energized, it will drive the power transmission shaft 23 to rotate counterclockwise (or clockwise). The first gear 26 on the power transmission shaft 23 will also rotate at this time. The first gear 26 will drive the second gear 35 on the travel limit switch 3 to rotate. The second gear 35 will drive the rotating mechanical contact block 32 on the limit transmission shaft 31 to rotate. When the mechanical contact block 32 rotates to a certain angle, it will touch and squeeze the corresponding contact 33a in the touch switch 33 (the contact 33 is composed of contacts K1 / K2 / K3 / K4 respectively). After the contact 33a of the touch switch 33 is triggered to close, it will send a signal to the PLC controller. After receiving the signal, the PLC controller will disconnect the current from the output terminal 34 or send it to the drive motor 21, thereby controlling the drive motor 21 to stop or run, thus completing the control of a door opening action.

[0040] According to another aspect of the invention, in combination Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, this invention provides a method for detecting the automatic door position of an intelligent construction hoist. The method includes the following steps: setting one or more trigger strokes for the travel limit switch 3; the transmission mechanism 2 drives the hoist cage 1 to operate, so that the hoist cage door 4 is about to enter a fully open or fully closed state; the control panel detects whether the travel limit switch 3 has been triggered to close; the control panel receives a switch signal to open or close the hoist cage door 4; based on the switch signal, it determines the operating position of the hoist cage door; it determines whether the operating position has reached a preset operating range; if it has reached the operating range, it stops operating the transmission mechanism 2, completing the opening or closing process of the hoist cage door 4 (fully open or fully closed); in this invention, if the hoist cage door 4 is not fully open or fully closed, i.e., the current operating position has not reached the preset operating range, and the control panel detects that the travel limit switch 3 has been triggered to close or has not been triggered to close, the control panel 10 issues an alarm signal. In this invention, as... Figure 5 As shown, when the travel limit switch 3 is triggered to close, the contact 33a of the touch switch 33 (the contact of the limit switch) of the travel limit switch 3 is divided into four normally open contacts. These four normally open contacts are respectively composed of contacts K1, K2, K3, and K4. They are further divided into two groups: contact K1-contact K2 and contact K3-contact K4. The trigger travel is set. K1 / K2 is used as the automatic door closed signal, and K3 / K4 is used as the automatic door open signal. K1 / K2 is connected in parallel with a jumper wire, and its signal is then connected to the corresponding output terminal 34. Similarly, K3 / K4 is connected in parallel with a jumper wire, and its signal is connected to the corresponding output terminal 34.

[0041] In this embodiment of the invention, when the control panel receives a switch signal indicating that the cage door 4 needs to be opened, the transmission mechanism 2 drives the cage door 4 to move upward on the cage 1. The control panel outputs a forward rotation control signal to control the transmission motor 21 to rotate forward, driving the power transmission shaft 2 and chain 6 to move the cage door 4 upward along the guide wheel 28. The counterweight 5 descends freely under the drive of the chain 6, raising the cage door 4 to a preset height. If the control panel 10 detects that the travel limit switch 3 has been triggered to close, a limit switch signal is generated and output to the control panel 10. The control panel 10 outputs a stop signal to control the transmission motor 21 to stop rotating, completing the opening process of the cage door 4. In this invention, when the cage door 3 is fully opened to the preset height, during the rotation of the second gear 35 driven by the first gear 26, a pre-set touch switch 33 in the travel limit switch 3 is triggered. At this time, the control panel detects and receives a limit switch signal, and then controls the transmission motor 21 to stop rotating, completing the opening process of the cage door 4.

[0042] When the control panel receives a switch signal indicating that the cage door 4 needs to be closed, it drives the cage door 4 to descend on the cage 1 via the transmission mechanism 2. Specifically, the control panel outputs a reverse control signal to control the transmission motor 21 to reverse, driving the power transmission shaft 2 and chain 6 to slide the cage door 4 downward along the guide wheel 28. The counterweight 5 rises freely under the drive of the chain 6, causing the cage door 4 to descend to close. If the control panel 10 detects that the travel limit switch 3 has been triggered to close, it generates a limit switch signal and outputs it to the control panel 10. The control panel 10 outputs a stop signal to control the transmission motor 21 to stop rotating, completing the closing process of the cage door 4. In this embodiment of the invention, when the cage door 4 is fully closed, during the rotation of the second gear 35 driven by the first gear 26, the pre-set touch switch 33 in the travel limit switch 3 is triggered. At this time, the control panel detects and receives a limit switch signal, and then controls the transmission motor 21 to stop rotating, completing the closing process of the cage door 4.

[0043] Combination Figure 2 , Figure 3 , Figure 4 Figure 5 , Figure 6 and Figure 7 The automatic door positioning detection process of the present invention is further described below. When the PLC controller in the control panel 10 receives a switch signal to open the cage door 4, it controls the drive motor 21 to rotate forward, driving the cage door 4 upward and opening through the power drive shaft 2 and chain 6. When the cage door is fully open, it triggers either of the pre-set contacts K3 / K4. At this time, the PLC controller receives a limit switch signal and controls the drive motor 21 to stop, completing the door opening process. Similarly, when the drive motor 21 receives a switch signal to close the cage door, it controls the drive motor 21 to rotate in reverse, driving the cage door 4 downward and closing through the power drive shaft 2 and chain 6. When the cage door is fully closed, it triggers either of the two pre-set contacts K1 / K2. At this time, the PLC controller receives a limit switch signal and controls the drive motor 21 to stop, completing the door closing process.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A smart construction hoist automatic door positioning detection device, characterized in that: The positioning detection device includes a control panel, a transmission mechanism and a travel limiter installed on the top of the hoist cage, and a hoist cage door installed at the entrance / exit of the hoist cage at each landing floor. Counterweights are respectively installed on both sides of the hoist cage door. Chains are respectively meshed at both ends of the transmission mechanism in the vertical direction. One end of the chain is connected to the counterweight, and the other end of the chain is connected to the lower side of the hoist cage door. The output shaft of the travel limiter is connected to the transmission mechanism. The control panel is electrically connected to the travel limiter and the transmission mechanism respectively. The transmission mechanism includes a drive motor, a reduction motor, a power transmission shaft, and sprockets. The power transmission shaft is connected in series at the top of the cage above the cage door, and is parallel to the top of the cage door. The drive motor is located at the center of the top of the cage. The output shaft of the drive motor is connected to the input and output ends of the reduction motor. The output shafts at both ends of the reduction motor are connected in series with the power transmission shaft via flanges. Sprockets are located at both ends of the power transmission shaft and on the outer side of the top of the cage. A chain is mounted on the sprockets. One end of the chain is connected to the counterweight, and the other end of the chain is connected to the lower side of the cage door via a connector. A first gear is mounted on the power transmission shaft between the flanges and the sprockets, and the first gear is connected to the travel limiter. The travel limiter includes a limit housing, a limit drive shaft, mechanical contact blocks, and touch switches. One end of the limit drive shaft is fixed inside the limit housing, and the other end of the limit drive shaft extends out of the limit housing and is provided with a second gear that meshes with the first gear. Multiple mechanical contact blocks connected to the limit drive shaft are provided inside the limit housing. A corresponding touch switch is provided on the opposite side of each mechanical contact block. When the limit drive shaft drives the mechanical contact block to rotate to the side of the touch switch, the contact point on each touch switch contacts the corresponding mechanical contact block. The control panel is electrically connected to the output terminal of the touch switch and the drive motor.

2. The intelligent construction hoist automatic door positioning detection device according to claim 1, characterized in that: Support seats are provided on both sides of the top of the cage above the cage door, and the two ends of the power transmission shaft are mounted on the support seats through bearing seats.

3. The intelligent construction hoist automatic door positioning detection device according to claim 1, characterized in that: Connecting sleeves are respectively provided on the output shafts at both ends of the geared motor, and the flange is connected to the output shafts at both ends of the geared motor through the connecting sleeves.

4. The intelligent construction hoist automatic door positioning detection device according to claim 1, characterized in that: Guide wheels are provided on both sides of the top of the cage door, and the guide wheels are connected to the top of the cage. Control buttons, an alarm and a PLC controller are provided on the control panel. The control buttons, alarm, travel limit switch and transmission mechanism are electrically connected to the PLC controller.

5. A method for detecting the arrival position of an automatic door on an intelligent construction hoist, characterized in that: The method for detecting the position of an automatic door of an intelligent construction hoist as described in any one of claims 1 to 4 includes the following steps: setting the trigger stroke of the travel limit switch; the transmission mechanism drives the hoist cage to run; when the hoist cage door is about to enter a fully open or fully closed state, the control panel detects whether the travel limit switch has been triggered to close; the control panel receives a switch signal to open or close the hoist cage door; the control panel determines the running position of the hoist cage door based on the switch signal; it determines whether the running position has reached the preset running range; if it has reached the running range, the transmission mechanism is stopped, and the hoist cage door opening or closing process is completed.

6. The method for detecting the arrival position of an automatic door of an intelligent construction hoist according to claim 5, characterized in that: When the control panel receives a switch signal that the cage door needs to be opened, it drives the cage door to move upward on the cage through the transmission mechanism. If the control panel detects that the travel limit switch has been triggered to close, it generates a limit switch signal and outputs it to the control panel. The control panel outputs a stop signal to control the transmission motor to stop rotating, thus completing the process of opening the cage door. When the control panel receives a switch signal to close the cage door, it drives the cage door to descend on the cage via the transmission mechanism. If the control panel detects that the travel limit switch has been triggered and closed, it generates a limit switch signal and outputs it to the control panel. The control panel outputs a stop signal to control the transmission motor to stop rotating, thus completing the cage door closing process.

7. The method for detecting the arrival position of an automatic door of an intelligent construction hoist according to claim 6, characterized in that: When the control panel receives a switch signal to open the cage door, it outputs a forward rotation control signal to control the drive motor to rotate forward, driving the power transmission shaft and chain to make the cage door slide upward along the guide wheel. The counterweight descends freely under the drive of the chain, raising the cage door to the preset height. When the cage door is raised to the preset height and fully opened, the first gear drives the second gear to rotate, triggering the touch switch that is preset in the travel limit switch. At this time, the control panel detects and receives a limit switch signal, and then the control panel controls the drive motor to stop rotating, thus completing the process of opening the cage door. When the control panel receives a switch signal indicating that the cage door needs to be closed, it outputs a reverse control signal to control the drive motor to reverse, driving the power transmission shaft and chain to slide the cage door downwards along the guide wheel. The counterweight rises freely under the drive of the chain, causing the cage door to descend and close. When the cage door is fully closed, the first gear drives the second gear to rotate, triggering a pre-set touch switch in the travel limit switch. At this time, the control panel detects and receives a limit switch signal, and then controls the drive motor to stop rotating, completing the cage door closing process.

8. The method for detecting the arrival position of an automatic door of an intelligent construction hoist according to claim 5, characterized in that: If the cage door is not fully open or fully closed, and the control panel detects that the travel limit switch has been triggered to close or has not been triggered to close, and the running position has not reached the preset running range, the control panel will issue an alarm signal.

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