An automatic door opening device for a lift platform and a method of using the same

Abstract

The application relates to the technical field of lifting platforms, in particular to a lifting platform automatic door opening device and a use method thereof, which comprises a lifting platform, a safety fence and a control panel, gaps are arranged between the safety fence, a group of stand columns are arranged on the lifting platform, a group of the stand columns are located between the gaps of the safety fence, a first movable door and a second movable door are respectively rotationally connected to the group of the stand columns, a group of driving mechanisms for driving the first movable door and the second movable door to be flipped and adjusted according to different use scenes are arranged on the lifting platform, the lifting platform, the stand columns, the air cylinder, the first connecting rod, the second connecting rod, the third connecting rod and the traction piece are matched, the output end of the air cylinder pushes the first connecting rod, the hinge mechanism is matched, the traction piece is driven to move along a predetermined arc track, the movable door is flipped outward and inward, and adjustment is carried out according to different use scenes.

Description

Technical Field

[0001] This invention relates to the field of lifting platform technology, and in particular to an automatic door opening device for a lifting platform and its usage method. Background Technology

[0002] Material hoists are commonly used equipment in material transfer and production sites. In the pharmaceutical industry, lifting platforms are often needed to lift and transfer materials or equipment. Existing work platforms are usually raised and lowered by lifting mechanisms. To ensure safety, safety railings are usually installed on the lifting platforms, and movable doors for materials and equipment to enter and exit are installed on the safety railings. Although existing lifting platforms have movable doors, they are usually manually opened and closed. During use, the movable doors of the lifting platforms are often not closed or not closed tightly, creating potential hazards at the edge and threatening the safety of workers.

[0003] The applicant previously disclosed a hoist with an automatic opening and closing platform on July 13, 2021, with Chinese utility model patent publication number CN213679398U; during operation, the power source is started, the working platform rises under the drive of the lifting mechanism, triggers the floor position detection mechanism and finally stops at the floor position, the movable door of the working platform opens until the door opening detection mechanism is triggered, the working platform receives the signal that the equipment has been taken away, the movable door of the working platform closes, the door closing detection mechanism is triggered, the automation level is high, the whole process can be controlled by the program and no manual operation is required;

[0004] However, in practical use, the applicant found that the most common design in the prior art is to open the movable door outwards. For example, when there are too many materials or equipment loaded on the lifting platform, the movable door needs to open outwards. When transferring materials or equipment to the target floor multiple times, materials or equipment that have been transferred to the target floor before and have not yet been transferred will affect the outward opening of the movable door, so the movable door needs to open inwards. Therefore, in the prior art, the movable door has relatively limited rotation and only has rotational freedom, which makes it difficult to cope with different situations and is inconvenient to use, which may affect the efficiency of equipment or material transfer. To this end, we designed an automatic door opening device for a lifting platform and its usage method. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that the existing automatic door opening device for lifting platforms is difficult to adjust according to different usage scenarios, is inconvenient to use, and affects the efficiency of equipment transfer. Therefore, this invention proposes an automatic door opening device for lifting platforms and its usage method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On one hand, the present invention provides an automatic door opening device for a lifting platform, including a lifting platform, a safety fence and a control panel. The safety fence has gaps between it, and the lifting platform is provided with a set of columns located between the gaps in the safety fence. A first movable door and a second movable door are rotatably connected to the set of columns through a set of rotating cylinders. The lifting platform is provided with a set of driving mechanisms, which are used to drive the first movable door and the second movable door to rotate and adjust according to different usage scenarios.

[0008] The drive mechanism includes a cylinder, a connecting member, a first connecting rod, a second connecting rod, a third connecting rod, and a traction member. The fixed end of the cylinder is rotatably connected to the lifting platform, and the output end is rotatably connected to the first connecting rod through the connecting member. The end of the first connecting rod away from the cylinder is rotatably connected to the traction member. The first connecting rod is rotatably connected to the second connecting rod. One end of the second connecting rod is rotatably connected to the lifting platform, and the other end is rotatably connected to the third connecting rod. The end of the third connecting rod away from the second connecting rod is rotatably connected to the traction member.

[0009] The cylinder output pushes the first connecting rod, and through the cooperation of the first, second, and third connecting rods and the traction component, the first and second movable doors move along a predetermined arc trajectory. Since the first and second movable doors form a fan-shaped area when they rotate, the first and second movable doors rotate around a set of sliding rods with the cooperation of the hinge assembly composed of the first, second, and third connecting rods and the traction component. This flips the first and second movable doors outward, placing the equipment to be transferred on the lifting platform. After placement, the cylinder output retracts, closing the first and second movable doors.

[0010] Furthermore, the lifting platform has a first mounting slot, and the drive mechanism is set in the first mounting slot, which provides space for the movement of the slide bar.

[0011] Optionally, the drive mechanism is installed on the upper surface of the lifting platform, a gap is left between the safety fence and the lifting platform, and a movable roller is provided at the end of the slide bar near the lifting platform.

[0012] The first and second movable doors are further provided with locking mechanisms. The locking mechanisms include a fixed block, an electric push rod, and a locking block. The fixed block is disposed on the first movable door, and the electric push rod is fixedly installed on the second movable door. The output end of the electric push rod is fixedly connected to the locking block. The fixed block has a locking groove adapted to the locking block.

[0013] By adopting the above technical solution, the output end of the electric push rod pushes the locking block into the locking slot on the fixed block, further locking the first and second movable doors when they are closed, ensuring the safety of the lifting platform. A proximity switch is installed in the locking slot of the fixed block. When the electric push rod touches the proximity switch, it stops moving forward and positions itself, maintaining the closed state. When it is necessary to open the door, the control board controls the output end of the electric push rod to retract. After the electric push rod moves away from the proximity switch, the control board then controls the output end of the cylinder to drive the hinge assembly, causing the traction component to push and pull the sliding rod to open the door. The switching between the closed and open states is remotely controlled by the circuit. By monitoring the status of the proximity switch, the open and locked states of the hoist platform are monitored, achieving intelligent monitoring for safe production.

[0014] The lifting platform is equipped with a lifting mechanism, which is used to adjust the lifting of the first movable door and the second movable door. The lifting mechanism includes a set of turntables and a set of connecting shafts. The turntables are arranged in a beveled cylindrical shape. An annular guide groove is opened on the beveled surface of the turntables. The guide wheel rolls in the guide groove. The turntables are coaxially and fixedly connected to the connecting shafts. The outer wall of the connecting shafts is provided with an external connecting thread.

[0015] By adopting the above technical solution, when there is an inclined platform between the lifting platform and the transfer vehicle, the inclined platform will interfere with the opening of the movable door as it rotates outward when opened. By installing guide wheels on the side of the movable door near the lifting platform, and a turntable corresponding to the guide wheels on the lifting platform, with the rotating cylinder and traction component respectively mounted on the column and slide rod, the output end of the cylinder pushes the hinge assembly to make the movable door rotate outward. Since the turntable is a beveled cylinder with guide grooves on its beveled surface, the guide wheels move within the guide grooves, causing the movable door to rise and fall. When the movable door needs to open outward and avoid the influence of the inclined platform, the guide wheels are initially positioned at the lowest point of the guide groove. As the movable door rotates, the guide wheels are gradually lifted within the guide groove, causing the movable door to rise accordingly, preventing the bottom of the movable door from contacting the inclined platform. Similarly, when the guide wheels are initially positioned at the highest point of the guide groove, as the movable door rotates, the guide wheels gradually descend within the guide groove, causing the movable door to fall accordingly. The operation is simple and convenient.

[0016] The lifting platform is provided with a second mounting slot, and the second mounting slot is provided with an adjustment mechanism, which is used to adjust the lifting height range of the first movable door and the second movable door.

[0017] The adjustment mechanism includes a drive motor, a bidirectional worm gear, a set of worm wheels, and multiple mounting shafts. The drive motor is fixedly installed in the second mounting slot, and the bidirectional worm gear is installed in the second mounting slot through multiple mounting shafts. The output end of the drive motor is coaxially and fixedly connected to the bidirectional worm gear.

[0018] A set of worm gears is coaxially arranged with a set of connecting shafts. The worm gears are mounted on a fixed plate and are rotatably connected to the fixed plate. The worm gears are provided with internal connecting threads that are compatible with the external connecting threads of the connecting shafts. The bidirectional worm is provided with symmetrical teeth in opposite directions. A set of worm gears meshes with the opposite teeth on the bidirectional worm.

[0019] By adopting the above technical solution, when the first and second movable doors are closed, the output end of the drive motor drives the bidirectional worm gear to rotate. The teeth on the bidirectional worm gear are symmetrically arranged in opposite directions, and a pair of worm wheels mesh with the opposite teeth on the bidirectional worm gear, causing the pair of worm wheels to rotate in opposite directions. Since the worm wheel has an internal connecting thread that matches the external connecting thread of the connecting shaft, and the worm wheel is fixedly installed in the second mounting groove by a fixing plate, when the worm wheel rotates, the internal connecting thread engages with the external connecting thread, causing the connecting shaft to move up and down. Since the connecting shaft is coaxially fixedly connected to the turntable, and the guide wheel is always located at the lowest point of the guide groove on the turntable, the range of the lifting height of the movable doors can be adjusted when the turntable is lifted or lowered.

[0020] Furthermore, both the first and second movable doors are fixedly connected to a sliding rod, and the traction component is coaxially sleeved on the outside of the sliding rod. Guide wheels are provided on the end of the first and second movable doors near the lifting platform.

[0021] By adopting the above technical solution, since the turntable is a beveled cylinder with a guide groove on its beveled surface, the guide wheel moves in the guide groove, causing the movable door to be raised and lowered. The initial position of the guide wheel is at the lowest point of the guide groove. As the movable door rotates, the guide wheel is gradually lifted in the guide groove, and the movable door rises accordingly, avoiding contact between the bottom of the movable door and the beveled platform. Similarly, the initial position of the guide wheel is at the highest point of the guide groove. As the movable door rotates, the guide wheel gradually descends in the guide groove, and the movable door descends accordingly.

[0022] Furthermore, a set of fixing plates is fixedly connected in the second mounting slot, and a slot is provided in the second mounting slot. The end of the connecting shaft away from the turntable is coaxially inserted into the slot, and the end of the connecting shaft away from the turntable is movably connected to the second mounting slot through the slot.

[0023] By adopting the above technical solution, it is easy to mount the worm gear on the fixed plate and fix its height, giving it only rotational freedom. When the bidirectional worm drives the worm gear to rotate, the worm gear has an internal connecting thread that matches the external connecting thread of the connecting shaft. Through the cooperation of the internal and external connecting threads, the connecting shaft drives the turntable to move up and down. The first and second movable doors are both set at the lowest end of the guide groove on the turntable via guide wheels. When the connecting shaft drives the turntable to move up and down, the first and second movable doors move up and down accordingly. When the first connecting rod is pushed again by the output end of the cylinder, the first, second, and third connecting rods and the traction component work together to drive the first and second movable doors to move along a predetermined arc trajectory. Since the guide wheel is initially located at the lowest point of the guide groove, it is gradually lifted in the guide groove as the movable door rotates. At this time, the movable door rises accordingly, thereby realizing the adjustment of the range of the movable door's lifting height.

[0024] Furthermore, the drive motor, cylinder, and electric push rod are all connected to the control board circuit via circuit signals, and the control board can be remotely controlled via circuit signals, or further programmed to realize the automatic opening and closing and status monitoring of the movable door, which is conducive to remote operation through the control platform and monitoring of the working status of the lifting platform.

[0025] On the other hand, the present invention provides a method of using an automatic door opening device for a lifting platform, the method of using an automatic door opening device for a lifting platform includes the following steps;

[0026] S1: The first connecting rod is pushed by the output end of the cylinder. Through the cooperation of the first connecting rod, the second connecting rod, the third connecting rod and the traction component, the first movable door and the second movable door are driven to move along a predetermined arc trajectory, flipping the first movable door and the second movable door outward, placing the equipment to be transferred on the lifting platform. After the equipment is fixed in place, the output end of the cylinder retracts, closing the first movable door and the second movable door, and filling the gap in the safety fence.

[0027] S2: The output end of the electric push rod pushes the locking block into the locking slot on the fixed block, and the first and second movable doors are further locked when they are closed to ensure the safety of the platform.

[0028] S3: When an inclined platform is provided between the lifting platform and the transfer vehicle, the output end of a set of cylinders pushes the first and second movable doors to move along a predetermined arc trajectory. At the same time, the first and second movable doors are lifted with the cooperation of guide wheels and guide grooves.

[0029] S4: The output end of the drive motor drives the bidirectional worm gear to rotate, causing a set of worm wheels to rotate in opposite directions. Then, the set of worm wheels cooperates with a set of connecting shafts, causing the set of connecting shafts to adjust the lifting height range of the first and second movable doors respectively.

[0030] S5: The control board is connected to the drive motor, cylinder and electric push rod by electrical signals. The control board is remotely controlled by circuit signals, and the working status of the lifting platform is monitored by remote operation.

[0031] The beneficial effects of this invention are as follows:

[0032] 1. In this invention, through the cooperation of a rotating drum, column, cylinder, first connecting rod, second connecting rod, third connecting rod and traction component, the output end of the cylinder pushes the first connecting rod, and then through the cooperation of the hinge mechanism, the traction component is driven to move along a predetermined arc trajectory. The traction component pushes and pulls the sliding rod on the movable door, realizing the outward and inward flipping of the movable door. It can be adjusted according to different usage scenarios. The structure is ingenious and easy to operate. The main structure is basically a prefabricated structure, which is convenient for disassembly, installation and maintenance.

[0033] 2. In this invention, the guide wheel is initially positioned at the lowest point of the guide groove. As the movable door rotates, the guide wheel is gradually lifted within the guide groove, and the movable door rises accordingly to prevent the bottom of the movable door from contacting the inclined platform. Similarly, the guide wheel is initially positioned at the highest point of the guide groove. As the movable door rotates, the guide wheel gradually descends within the guide groove, and the movable door descends accordingly. The operation is simple and convenient.

[0034] 3. In the closed state of the first and second movable doors, the present invention drives the bidirectional worm gear to rotate through the output end of the drive motor. The teeth on the bidirectional worm gear are symmetrically arranged in opposite directions, and a pair of worm wheels mesh with the opposite teeth on the bidirectional worm gear, so that the pair of worm wheels rotate in opposite directions. Since the worm wheel has an internal connecting thread that matches the external connecting thread of the connecting shaft, and the worm wheel is fixedly installed in the second mounting groove by a fixing plate, the range of the lifting height of the movable door driven by the connecting shaft can be adjusted.

[0035] 4. The present invention provides a fixed block and an electric push rod on the first and second movable doors respectively. The output end of the electric push rod pushes the locking block to be inserted into the locking groove on the fixed block, thereby further locking the first and second movable doors when they are closed, ensuring the safety of the working platform. Furthermore, the drive motor, cylinder and electric push rod are all connected to the control board circuit through circuit signals, and the control board can be remotely controlled through circuit signals, or further programmed to realize the automatic opening and closing and status monitoring of the movable doors, which is beneficial for remote operation through the control platform and monitoring of the working status of the lifting platform. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an automatic door opening device for a lifting platform proposed in this invention;

[0037] Figure 2 This is a front view of an automatic door opening device for a lifting platform proposed in this invention;

[0038] Figure 3 This is a schematic diagram of the inward flipping state of the movable door of the automatic door opening device for a lifting platform proposed in this invention;

[0039] Figure 4 This is a schematic diagram of the outward flipping state of the movable door of the automatic door opening device for a lifting platform proposed in this invention;

[0040] Figure 5 This is a schematic diagram of the closed state of the movable door of the automatic door opening device for a lifting platform proposed in this invention;

[0041] Figure 6 for Figure 5 Enlarged schematic diagram of part A;

[0042] Figure 7 This is a schematic diagram of the drive mechanism of an automatic door opening device for a lifting platform proposed in this invention;

[0043] Figure 8 This is a schematic diagram of the adjustment mechanism of an automatic door opening device for a lifting platform proposed in this invention.

[0044] In the diagram: 1. Lifting platform; 101. First mounting slot; 102. Second mounting slot; 2. Safety fence; 201. Control panel; 3. Equipment to be transferred; 4. First movable door; 401. Fixing block; 5. Second movable door; 501. Electric push rod; 502. Locking block; 6. Column; 601. Rotary drum; 602. Sliding rod; 7. Cylinder; 701. Connecting piece; 702. First connecting rod; 703. Second connecting rod; 704. Third connecting rod; 705. Traction component; 8. Turntable; 801. Guide groove; 802. Guide wheel; 803. Connecting shaft; 9. Drive motor; 901. Bidirectional worm gear; 902. Worm wheel; 903. Mounting shaft platform. Detailed Implementation

[0045] The following combination Figures 1-8 The present invention will be described in further detail below.

[0046] Example 1:

[0047] This embodiment discloses an automatic door opening device for a lifting platform, referring to... Figures 1-8An automatic door opening device for a lifting platform includes a lifting platform 1, a safety fence 2, and a control panel 201. The safety fence 2 has gaps between its sections. A set of columns 6 is provided on the lifting platform 1, and the set of columns 6 is located between the gaps in the safety fence 2. A first movable door 4 and a second movable door 5 are rotatably connected to the set of columns 6 through a set of rotating cylinders 601. The first movable door 4 and the second movable door 5 are further provided with a locking mechanism, which includes a fixing block 401, an electric push rod 501, and a locking block 502. The fixing block 401 is provided on the first movable door 4, and the electric push rod 501 is fixedly installed on the second movable door 5. The output end of the electric push rod 501 is fixedly connected to the locking block 502. The fixing block 401 has a locking groove that is adapted to the locking block 502.

[0048] The output end of the electric push rod 501 pushes the locking block 502 into the locking slot on the fixed block 401, thereby further locking the first movable door 4 and the second movable door 5 when they are closed, ensuring the safety of the lifting platform 1. The drive motor 9, cylinder 7 and electric push rod 501 are all connected to the control board 201 via circuit signals, and the control board 201 is remotely controlled via circuit signals, which is beneficial for remote operation and monitoring of the working status of the lifting platform 1 through the control platform.

[0049] Reference Figure 4 and Figure 7 The lifting platform 1 is equipped with a set of drive mechanisms, which are used to drive the first movable door 4 and the second movable door 5 to flip and adjust according to different usage scenarios.

[0050] The drive mechanism includes a cylinder 7, a connecting member 701, a first connecting rod 702, a second connecting rod 703, a third connecting rod 704, and a traction member 705. The fixed end of the cylinder 7 is rotatably connected to the lifting platform 1, and its output end is rotatably connected to the first connecting rod 702 via the connecting member 701. The end of the first connecting rod 702 away from the cylinder 7 is rotatably connected to the traction member 705. The first connecting rod 702 is rotatably connected to the second connecting rod 703. One end of the second connecting rod 703 is rotatably connected to the lifting platform 1, and the other end is rotatably connected to the third connecting rod 704. The end of 704 away from the second link 703 is rotatably connected to the traction member 705. The output end of the cylinder 7 pushes the first link 702. With the cooperation of the first link 702, the second link 703, the third link 704 and the traction member 705, the first movable door 4 and the second movable door 5 move along a predetermined arc trajectory, flipping the first movable door 4 and the second movable door 5 outward, placing the equipment 3 to be transferred on the lifting platform 1. After placement, the output end of the cylinder 7 retracts, closing the first movable door 4 and the second movable door 5.

[0051] Reference Figure 5 and Figure 6The lifting platform 1 is equipped with a lifting mechanism, which is used to adjust the height of the first movable door 4 and the second movable door 5. The lifting mechanism includes a set of turntables 8 and a set of connecting shafts 803. The turntables 8 are obliquely cut cylindrical shapes, and an annular guide groove 801 is opened on the oblique surface of the turntables 8. The guide wheel 802 rolls in the guide groove 801. The turntables 8 and the connecting shafts 803 are coaxially fixedly connected, and the outer wall of the connecting shafts 803 is provided with external connecting threads. When the output end of the cylinder 7 pushes the hinge assembly to make the movable door rotate outward, the turntables 8 are obliquely cut. The cylinder is cut, and a guide groove 801 is provided on its oblique surface. When the guide wheel 802 moves in the guide groove 801, the movable door is raised and lowered. The guide wheel 802 is initially located at the lowest point of the guide groove 801. As the movable door rotates, the guide wheel 802 is gradually lifted in the guide groove 801, and the movable door is raised accordingly. Similarly, when the guide wheel 802 is initially located at the highest point of the guide groove 801, as the movable door rotates, the guide wheel 802 is gradually lowered in the guide groove 801, and the movable door is lowered accordingly.

[0052] In this embodiment 1, the implementation principle of an automatic door opening device for a lifting platform is as follows:

[0053] First, the output end of cylinder 7 pushes the first connecting rod 702. Through the cooperation of the first connecting rod 702, the second connecting rod 703, the third connecting rod 704 and the traction component 705, the first movable door 4 and the second movable door 5 move along a predetermined arc trajectory, flipping the first movable door 4 and the second movable door 5 outward, placing the equipment 3 to be transferred on the lifting platform 1. After placement, the output end of cylinder 7 retracts, closing the first movable door 4 and the second movable door 5.

[0054] The output end of the electric push rod 501 pushes the locking block 502 into the locking slot on the fixed block 401, further locking the first movable door 4 and the second movable door 5 in the closed state to ensure the safety of the lifting platform 1. A proximity switch is provided in the locking slot of the fixed block 401. When the electric push rod 501 touches the proximity switch, it stops moving forward and is positioned to maintain the closed state. When it is necessary to open the door, the control board 201 controls the output end of the electric push rod 501 to retract. After the electric push rod 501 moves away from the proximity switch, the control board 201 then controls the output end of the cylinder 7 to drive the hinge assembly, so that the traction member 705 pushes and pulls the slide rod 602 to open the door. The switching between the closed and open states is remotely controlled by the circuit. The open and locked states of the hoist platform are monitored by monitoring the state of the proximity switch, realizing intelligent monitoring for safe production.

[0055] Example 2:

[0056] This embodiment discloses an automatic door opening device for a lifting platform, referring to... Figures 1-8An automatic door opening device for a lifting platform is provided. The lifting platform 1 has a second mounting groove 102 and an adjustment mechanism is provided in the second mounting groove 102. The adjustment mechanism is used to adjust the lifting height range of the first movable door 4 and the second movable door 5.

[0057] The adjustment mechanism includes a drive motor 9, a bidirectional worm gear 901, a set of worm wheels 902 and multiple mounting shafts 903. The drive motor 9 is fixedly installed in the second mounting groove 102, and the bidirectional worm gear 901 is installed in the second mounting groove 102 through multiple mounting shafts 903. The output end of the drive motor 9 is coaxially and fixedly connected to the bidirectional worm gear 901.

[0058] A set of worm gears 902 are coaxially arranged with a set of connecting shafts 803. The worm gears 902 are mounted on a fixed plate and are rotatably connected to the fixed plate. The worm gears 902 have internal connecting threads that are compatible with the external connecting threads of the connecting shafts 803. The bidirectional worm 901 has symmetrical teeth in opposite directions. A set of worm gears 902 mesh with the opposite teeth on the bidirectional worm 901. When the first movable door 4 and the second movable door 5 are closed, the bidirectional worm 901 is driven to rotate by the output end of the drive motor 9. The teeth on the bidirectional worm 901 are symmetrically arranged in opposite directions, and the pair of worm gears 902 mesh with the opposite teeth on the connecting shafts 803. The opposing teeth on the worm gear 901 mesh, causing a pair of worm wheels 902 to rotate in opposite directions. Since the worm wheel 902 has an internal connecting thread that matches the external connecting thread of the connecting shaft 803, and the worm wheel 902 is fixedly installed in the second mounting groove 102 by a fixing plate, when the worm wheel 902 rotates, the internal connecting thread engages with the external connecting thread, causing the connecting shaft 803 to move up and down. Since the connecting shaft 803 is coaxially fixedly connected to the turntable 8, and the guide wheel 802 is always located at the lowest point of the guide groove 801 on the turntable 8, the range of the lifting height of the movable door can be adjusted when the turntable 8 is lifted or lowered.

[0059] Reference Figure 5 and Figure 6A sliding rod 602 is fixedly connected to both the first movable door 4 and the second movable door 5. A traction component 705 is coaxially sleeved on the outside of the sliding rod 602. Guide wheels 802 are provided on the end of the first movable door 4 and the second movable door 5 near the lifting platform 1. Since the turntable 8 is a slanted cylinder and has a guide groove 801 on its slanted surface, the guide wheel 802 moves in the guide groove 801, causing the movable door to be raised and lowered. The guide wheel 802 is initially located at the lowest point of the guide groove 801. As the movable door rotates, the guide wheel 802 is gradually lifted in the guide groove 801, and the movable door is raised accordingly to avoid the bottom of the movable door contacting the slanted platform. Similarly, the guide wheel 802 is initially located at the highest point of the guide groove 801. As the movable door rotates, the guide wheel 802 is gradually lowered in the guide groove 801, and the movable door is lowered accordingly.

[0060] Reference Figure 1 and Figure 4 A set of fixing plates is fixedly connected in the second mounting groove 102. The second mounting groove 102 is provided with a slot. The end of the connecting shaft 803 away from the turntable 8 is coaxially inserted into the slot. The end of the connecting shaft 803 away from the turntable 8 is movably connected to the second mounting groove 102 through the slot, so that the worm gear 902 can be mounted on the fixing plate. The height of the worm gear 902 is fixed so that it only has the freedom of rotation. When the bidirectional worm 901 drives the worm gear 902 to rotate, since the worm gear 902 is provided with an internal connecting thread that is compatible with the external connecting thread of the connecting shaft 803, the connecting shaft 803 drives the turntable 8 to move up and down through the cooperation of the internal connecting thread and the external connecting thread.

[0061] A method of using an automatic door opening device for a lifting platform includes the following steps;

[0062] S1: The output end of the cylinder 7 pushes the first connecting rod 702. Through the cooperation of the first connecting rod 702, the second connecting rod 703, the third connecting rod 704 and the traction component 705, the first movable door 4 and the second movable door 5 move along a predetermined arc trajectory, flipping the first movable door 4 and the second movable door 5 outward, placing the equipment 3 to be transferred on the lifting platform 1. After the fixed placement is completed, the output end of the cylinder 7 retracts, closing the first movable door 4 and the second movable door 5, and filling the gap in the safety fence 2.

[0063] S2: The output end of the electric push rod 501 pushes the locking block 502 into the locking slot on the fixed block 401, and the first movable door 4 and the second movable door 5 are further locked when they are closed to ensure the safety of the lifting platform 1.

[0064] S3: When an inclined platform is provided between the lifting platform 1 and the transfer vehicle, the output end of a set of cylinders 7 pushes the first movable door 4 and the second movable door 5 to move along a predetermined arc trajectory. At the same time, the first movable door 4 and the second movable door 5 are lifted with the cooperation of the guide wheel 802 and the guide groove 801.

[0065] S4: The output end of the drive motor 9 drives the bidirectional worm gear 901 to rotate, causing a set of worm wheels 902 to rotate in opposite directions. The set of worm wheels 902 then cooperates with a set of connecting shafts 803, allowing the connecting shafts 803 to adjust the lifting height range of the first movable door 4 and the second movable door 5 respectively.

[0066] S5: The control board 201 is connected to the drive motor 9, cylinder 7 and electric push rod 501 by electrical signals. The control board 201 is remotely controlled by circuit signals, and the working status of the lifting platform 1 is monitored by remote operation.

[0067] The working principle of this embodiment is as follows:

[0068] When an inclined platform is provided between the lifting platform 1 and the transfer vehicle, the output end of a set of cylinders 7 pushes the first movable door 4 and the second movable door 5 to move along a predetermined arc trajectory. At the same time, with the cooperation of guide wheels 802 and guide grooves 801, the first movable door 4 and the second movable door 5 are lifted. The output end of the drive motor 9 drives the bidirectional worm gear 901 to rotate. The teeth on the bidirectional worm gear 901 are symmetrically arranged in opposite directions, and a pair of worm wheels 902 have opposite teeth to the bidirectional worm gear 901. The teeth mesh, causing a pair of worm gears 902 to rotate in opposite directions. Since the worm gears 902 have internal connecting threads that are compatible with the external connecting threads of the connecting shaft 803, and the worm gears 902 are fixedly installed in the second mounting groove 102 by a fixing plate, when the worm gears 902 rotate, the internal connecting threads engage with the external connecting threads, causing the connecting shaft 803 to move up and down. Since the connecting shaft 803 is coaxially fixedly connected to the turntable 8, and the guide wheel 802 is always located at the lowest point of the guide groove 801 on the turntable 8, the turntable 8 can be lifted or lowered.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic door opening device for a lifting platform, comprising a lifting platform (1), a safety fence (2), and a control panel (201), characterized in that, The safety fence (2) has gaps between its sections. The lifting platform (1) has a set of columns (6) located between the gaps in the safety fence (2). The first movable door (4) and the second movable door (5) are rotatably connected to the columns (6). The lifting platform (1) has a set of drive mechanisms for driving the first movable door (4) and the second movable door (5) to flip and adjust according to different usage scenarios. The first movable door (4) and the second movable door (5) are further provided with locking mechanisms. The lifting platform (1) has a lifting mechanism for adjusting the height of the first movable door (4) and the second movable door (5). The lifting platform (1) has a second mounting slot (102). The second mounting slot (102) has an adjustment mechanism for adjusting the height range of the first movable door (4) and the second movable door (5). The drive mechanism includes: The cylinder (7), connector (701), first connecting rod (702), second connecting rod (703), third connecting rod (704), and traction member (705) are provided. The fixed end of the cylinder (7) is rotatably connected to the lifting platform (1), and the output end is rotatably connected to the first connecting rod (702) through the connector (701). The end of the first connecting rod (702) away from the cylinder (7) is rotatably connected to the traction member (705). The first connecting rod (702) is rotatably connected to the second connecting rod (703). One end of the second connecting rod (703) is rotatably connected to the lifting platform (1), and the other end is rotatably connected to the third connecting rod (704). The end of the third connecting rod (704) away from the second connecting rod (703) is rotatably connected to the traction member (705).

2. The automatic door opening device for a lifting platform according to claim 1, characterized in that, The locking mechanism includes: The device includes a fixing block (401), an electric push rod (501), and a locking block (502). The fixing block (401) is mounted on the first movable door (4), and the electric push rod (501) is fixedly mounted on the second movable door (5). The output end of the electric push rod (501) is fixedly connected to the locking block (502). The fixing block (401) has a locking groove that is compatible with the locking block (502).

3. The automatic door opening device for a lifting platform according to claim 2, characterized in that, The first movable door (4) and the second movable door (5) are both fixedly connected to a slide rod (602), and the traction member (705) is coaxially sleeved on the outside of the slide rod (602). The first movable door (4) and the second movable door (5) are both provided with guide wheels (802) at the end near the lifting platform (1).

4. The automatic door opening device for a lifting platform according to claim 3, characterized in that, The lifting mechanism includes: A set of turntables (8) and a set of connecting shafts (803) are provided. The turntables (8) are arranged in a beveled cylindrical shape. An annular guide groove (801) is provided on the beveled surface of the turntables (8). The guide wheel (802) rolls in the guide groove (801). The turntables (8) and the connecting shafts (803) are coaxially fixedly connected. The outer side wall of the connecting shafts (803) is provided with an external connecting thread.

5. The automatic door opening device for a lifting platform according to claim 4, characterized in that, A set of fixing plates is fixedly connected in the second mounting slot (102). The second mounting slot (102) is provided with a slot. The end of the connecting shaft (803) away from the turntable (8) is coaxially inserted into the slot. The end of the connecting shaft (803) away from the turntable (8) is movably connected to the second mounting slot (102) through the slot.

6. An automatic door opening device for a lifting platform according to any one of claims 3-5, characterized in that, The adjustment mechanism includes: The drive motor (9), bidirectional worm gear (901), a set of worm wheels (902) and multiple mounting shafts (903) are provided. The drive motor (9) is fixedly installed in the second mounting groove (102). The bidirectional worm gear (901) is installed in the second mounting groove (102) through multiple mounting shafts (903). The output end of the drive motor (9) is coaxially and fixedly connected to the bidirectional worm gear (901). A set of worm gears (902) are coaxially arranged with a set of connecting shafts (803). The worm gears (902) are mounted on a fixed plate and are rotatably connected to the fixed plate. The worm gears (902) are provided with internal connecting threads that are compatible with the external connecting threads of the connecting shafts (803). The bidirectional worm (901) is provided with symmetrical teeth in opposite directions. The set of worm gears (902) meshes with the opposite teeth on the bidirectional worm (901).

7. A method of using an automatic door opening device for a lifting platform as described in any one of claims 1-6, characterized in that: Includes the following steps; S1: The first connecting rod (702) is pushed by the output end of the cylinder (7). Through the cooperation of the first connecting rod (702), the second connecting rod (703), the third connecting rod (704) and the traction member (705), the first movable door (4) and the second movable door (5) are driven to move along the predetermined arc trajectory, and the first movable door (4) and the second movable door (5) are flipped outward to place the equipment (3) to be transferred on the lifting platform (1). After the fixed placement is completed, the output end of the cylinder (7) retracts to close the first movable door (4) and the second movable door (5) and fill the gap in the safety fence (2). S2: The output end of the electric push rod (501) pushes the locking block (502) into the locking slot on the fixed block (401), and the first movable door (4) and the second movable door (5) are further locked when they are closed to ensure the safety of the lifting platform (1). S3: When an inclined platform is provided between the lifting platform (1) and the transfer vehicle, the output end of a set of cylinders (7) pushes the first movable door (4) and the second movable door (5) to move along a predetermined arc trajectory. At the same time, the first movable door (4) and the second movable door (5) are lifted by the cooperation of the guide wheel (802) and the guide groove (801). S4: Drive the bidirectional worm gear (901) to rotate through the output end of the drive motor (9), so that a set of worm wheels (902) rotate in opposite directions. Then, the set of worm wheels (902) cooperate with a set of connecting shafts (803) respectively, so that the set of connecting shafts (803) respectively drive the first movable door (4) and the second movable door (5) to adjust the range of lifting height. S5: The control board (201) is connected to the drive motor (9), cylinder (7) and electric push rod (501) by electrical signals respectively. The control board (201) is remotely controlled by the circuit signal, and the working status of the lifting platform (1) is monitored by remote operation.

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