A gear set stop mechanism device for a folding door

Abstract

The application relates to the technical field of folding doors and discloses a gear set parking mechanism device for a folding door, which comprises a central shaft, a plurality of fixed fans are arranged on the outer wall of the central shaft along the radial direction of the central shaft, the fixed fans are uniformly distributed along the circumferential direction of the central shaft, a bottom plate is fixedly connected to the top of the fixed fan away from one side of the central shaft through a fixing bolt, a transmission shaft is rotationally connected to the middle of the bottom plate, a folding fan that rotates synchronously with the transmission shaft is arranged at the lower end of the transmission shaft, a driving gear is arranged at the upper end of the transmission shaft, ground springs are arranged at the two sides of the bottom plate, and a driven gear that is meshed with the driving gear is arranged at the end of the ground spring. The gear set transmission is matched with the mature ground spring parking, the traditional sliding block, the compression spring and other vulnerable components are omitted, and the overall structure is greatly simplified; the gear transmission has high precision, is matched with the ground spring gear locking, is stable in parking and has no automatic dislocation risk, and the reliability is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of folding door technology, specifically a gear set stopping mechanism device for folding doors. Background Technology

[0002] Currently, three-wing and four-wing folding revolving doors are widely used in pedestrian passages of large public buildings. Each wing typically consists of an inner fixed wing and an outer folding wing. Under normal use, each wing rotates uniformly around the central axis under the drive of a drive unit, allowing for orderly pedestrian passage. In existing technology, to meet the escape needs in emergencies such as fire evacuation, these folding revolving doors are usually equipped with a stopping mechanism. When an emergency requires activating the evacuation function, the folding wing can be manually pushed open to rotate and fold relative to the fixed wing, and the stopping mechanism positions the folding wing at a certain opening angle, thus creating an evacuation passage for pedestrians. Currently, the commonly used stopping mechanism for folding revolving doors is a damping slider structure. Its basic form includes components such as a V-shaped slider, a compression spring, a slider mounting base, and a V-shaped lock base. The compression spring provides damping force, causing the V-shaped slider to engage in the lock base, thus maintaining the folding wing at the opening angle.

[0003] However, the existing damping slider-type stopping mechanism has significant technical drawbacks in practical applications. First, the damping force of this mechanism is determined by the compression of the spring, and adjusting the spring's damping force is cumbersome, requiring repeated disassembly and adjustment to balance the conflict between damping force and ease of operation: if the damping force is too high, pushing and pulling the folding fan becomes extremely difficult, making it hard to open quickly in emergencies; if the damping force is too low, the folding fan is prone to automatically disengaging from its stopping position due to slight vibrations or external forces after opening, leading to stopping failure. Second, the V-shaped slider and the lock base experience repeated friction over time, easily causing wear and deformation, and the spring's elasticity weakens after prolonged compression, further affecting the accuracy and reliability of positioning. Furthermore, this type of stopping mechanism is typically installed at the bottom of the door leaf, making daily lubrication and maintenance difficult and inconvenient. Therefore, there is an urgent need for a folding revolving door stopping mechanism that is simple in structure, easy to operate, reliable in stopping, and easy to maintain. Summary of the Invention

[0004] The present invention provides a gear set stopping mechanism for folding doors, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A gear set stopping mechanism for a folding door includes a central shaft. Multiple fixed panels are arranged radially along the outer wall of the central shaft, and these fixed panels are evenly distributed circumferentially along the central shaft. A base plate is fixedly connected to the top of each fixed panel away from the central shaft via fixing bolts. A drive shaft is rotatably connected to the middle of the base plate. A folding panel that rotates synchronously with the drive shaft is located at the lower end of the drive shaft. A drive gear is located at the upper end of the drive shaft. Floor springs are located on both sides of the base plate, and driven gears that mesh with the drive gear are located at the ends of the floor springs.

[0007] As a preferred embodiment of the present invention, an electromagnetic clutch is sleeved on the outside of the transmission shaft, a magnetic column is provided on the outer extension of the drive gear, a bracket is provided on the base plate, and an inductor that cooperates with the magnetic column is provided at the end of the bracket.

[0008] As a preferred embodiment of the present invention, a square anti-rotation post is provided at the lower end of the transmission shaft, and a door hinge clamping assembly that cooperates with the square anti-rotation post is provided at the top of the folding fan.

[0009] As a preferred embodiment of the present invention, the door hinge clamping assembly includes a door hinge clamping seat and a door hinge clamping block that are configured to cooperate with each other. The square anti-rotation post is disposed between the door hinge clamping block and the door hinge clamping seat. A groove with matching dimensions of the square anti-rotation post is provided on the opposite side of the door hinge clamping block and the door hinge clamping seat.

[0010] As a preferred embodiment of the present invention, the end of the door hinge clamping block is provided with a lateral fixing bolt threadedly connected to the door hinge clamping seat, and the side of the door hinge clamping seat is provided with a door leaf fixing bolt threadedly connected to the folding fan.

[0011] As a preferred embodiment of the present invention, the bottom of the fixed fan is provided with a support member, the end of the support member is provided with a shaft hole, and the bottom corner of the folding fan is provided with a lower corner bracket, the bottom of the lower corner bracket is provided with a pin that mates with the shaft hole.

[0012] As a preferred embodiment of the present invention, both the fixed fan and the folding fan are provided with door seam brushes on their upper and lower sides.

[0013] As a preferred embodiment of the present invention, it further includes a revolving door outer wall coaxially arranged with the central axis, and entrances and exits are provided on both sides of the revolving door outer wall.

[0014] The present invention has the following advantages:

[0015] 1. Simplified and reliable structure with high positioning accuracy. This invention adopts a structure of meshing drive gear and driven gear to transmit the rotational motion of the folding fan to the floor spring. It utilizes the angle positioning function built into mature floor spring products to achieve the opening and positioning of the folding fan, eliminating a large number of easily damaged parts such as traditional sliders, compression springs, and locking bases, greatly simplifying the overall structure. The gear transmission has small clearance and precise transmission. Combined with the floor spring's position positioning, the opening angle of the folding fan is stable and there will be no automatic disengagement, significantly improving the positioning reliability.

[0016] 2. Easy and effortless operation, highly adaptable. The damping force of the floor spring can be flexibly adjusted through its own adjustment structure. Without disassembling the core components, it can be adapted to folding fans of different sizes and weights, especially suitable for extra-large three- or four-wing folding revolving doors. The reasonable gear transmission ratio can optimize the manual pushing force, allowing pedestrians to easily push open the folding fan in emergencies, ensuring evacuation efficiency.

[0017] 3. Convenient maintenance and long service life. The entire stopping mechanism is integrated and installed on the base plate at the top of the fixed door leaf. There is no need to disassemble the bottom structure of the door leaf during inspection and maintenance. There is ample operating space, and daily lubrication and component replacement are very convenient. The floor spring is a mature and common component in the door control field. It has stable performance and long service life. The gear meshing transmission has low wear, which greatly reduces the overall maintenance cost.

[0018] 4. Smooth reset and convenient switching. When the folding fan resets, the floor spring provides auxiliary reset force, allowing the door to automatically and smoothly return to its original position. In conjunction with the non-contact position detection of the magnetic column and the sensor, the electromagnetic clutch automatically locks the drive shaft after the folding fan is reset, achieving a rigid connection between the folding fan and the fixed fan. Pressing the start button or triggering the sensor will switch to the normal rotation operation mode. The mode switching is smooth and highly automated.

[0019] 5. Stable installation structure and smooth rotation. The top of the folding fan achieves circumferential limitation through a square anti-rotation post and a door hinge clamping assembly, while the bottom forms a rotation fulcrum through a pin and a shaft hole of the support component. The upper and lower parts are arranged coaxially, so there is no jamming during rotation and the door operates smoothly. At the same time, the square anti-rotation structure can withstand large torques, preventing slippage and loosening problems after long-term use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a gear set stopping mechanism for a folding door.

[0022] Figure 2 This is a schematic diagram of the base plate in a gear set stopping mechanism for folding doors.

[0023] Figure 3 for Figure 2 Exploded view.

[0024] Figure 4 This is a top view of the central shaft engaging with a fixed leaf in a gear set stopping mechanism for a folding door.

[0025] Figure 5 This is a schematic diagram of the structure in which the base plate is connected to the top of the folding fan in a gear set stopping mechanism for a folding door.

[0026] Figure 6 This is a schematic diagram of the door shaft clamping seat in a gear set stopping mechanism for folding doors.

[0027] Figure 7 This is a schematic diagram of the structure below the base plate in a gear set stopping mechanism for folding doors.

[0028] Figure 8 This is a schematic diagram of the structure of a gear set stopping mechanism for a folding door, showing the fixed fan and the folding fan at the bottom.

[0029] Figure 9 This is a schematic diagram of the structure of a gear set stopping mechanism for a folding door when the folding fan is opened.

[0030] Figure 10 This is a schematic diagram of the structure of a gear set stopping mechanism for a folding door after the folding fan has been folded.

[0031] In the diagram: 1. Fixed door; 2. Folding door; 3. Base plate; 4. Floor spring; 5. Driven gear; 6. Drive gear; 7. Electromagnetic clutch; 8. Drive shaft; 9. Bracket; 10. Sensor; 11. Magnetic column; 12. Central shaft; 13. Fixing bolt; 14. Square anti-rotation column; 15. Door seam brush; 16. Support component; 17. Shaft hole; 18. Pin; 19. Lower corner bracket; 20. Door hinge clamping assembly; 21. Lateral fixing bolt; 22. Door hinge clamping block; 23. Door hinge clamping seat; 24. Door leaf fixing bolt; 25. Outer wall of the revolving door. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In one embodiment, see Figures 1-10 A gear-set stopping mechanism for a folding door includes a vertically arranged central shaft 12, which serves as the main rotation axis of the entire folding revolving door. Its upper and lower ends are rotatably connected to the top of the revolving door's cap and the ground structure, respectively, via bearing seats. Multiple fixed panels 1 are radially fixedly installed on the outer wall of the central shaft 12, evenly distributed around its circumference. In this embodiment, a three-wing structure is used as an example, with three sets of fixed panels 1. The inner ends of the fixed panels 1 are bolted to the side wall of the central shaft 12 and rotate synchronously with it.

[0034] The top of the fixed fan 1, away from the outer end of the central shaft 12, is fixedly mounted with a horizontally arranged base plate 3 by multiple sets of fixing bolts 13. The base plate 3, as the mounting and bearing base of the positioning mechanism, is made of high-strength metal sheet and has sufficient structural rigidity and load-bearing capacity. A mounting hole is provided in the middle of the base plate 3, and a rolling bearing is installed in the mounting hole. A drive shaft 8 is vertically inserted through the inner ring of the bearing, and the drive shaft 8 can rotate freely and smoothly around its own axis. The lower end of the drive shaft 8 extends downward and connects to the top of the folding fan 2, driving the folding fan 2 to rotate synchronously. The upper end of the drive shaft 8 extends upward beyond the upper surface of the base plate 3 and is fixedly fitted with a drive gear 6 by a key connection. The drive gear 6 rotates coaxially and synchronously with the drive shaft 8.

[0035] The upper surface of the base plate 3 is located on both the front and rear sides of the drive gear 6, and floor springs 4 are fixedly installed on both sides by bolts. The floor springs 4 are mature hydraulic hardware products in the door control field, with built-in hydraulic damping structure and angle stopping mechanism. They can realize the functions of automatically stopping after the door is opened to a set angle and automatically resetting after being triggered by external force. Moreover, the damping force and stopping angle can be flexibly adjusted by their own adjustment structure. The rotation output shafts of the floor springs 4 on both sides are set vertically upward. The top of the output shaft is fixedly installed with driven gears 5 by key connection. The two driven gears 5 mesh with the drive gear 6 in the middle, forming a symmetrical gear transmission group. When the folding fan 2 drives the transmission shaft 8 and the drive gear 6 to rotate, the drive gear 6 synchronously drives the output shafts of the driven gears 5 on both sides and the floor springs 4 to rotate, so as to evenly transmit the rotational torque of the folding fan 2 to the floor springs 4 on both sides.

[0036] In one embodiment, an electromagnetic clutch 7 is sleeved on the outside of the drive shaft 8. The stator body of the electromagnetic clutch 7 is fixedly installed on the upper surface of the base plate 3, and its rotor friction plate is synchronously connected to the drive shaft 8. When the electromagnetic clutch 7 is energized, it is in a brake-locked state, which can fix the drive shaft 8 and the base plate 3 relative to each other, so that the drive shaft 8 cannot rotate relative to each other, thereby keeping the folding fan 2 and the fixed fan 1 relatively fixed. When the electromagnetic clutch 7 is de-energized, it is in a released state, the rotational freedom of the drive shaft 8 is released, and the folding fan 2 can be pushed open and folded relative to the fixed fan 1.

[0037] A magnetic column 11 is fixedly installed at the edge of the upper surface of the drive gear 6, and the magnetic column 11 moves in a circular motion synchronously with the drive gear 6. An L-shaped bracket 9 is also fixedly installed on the upper surface of the base plate 3, and a sensor 10 is fixedly installed at the horizontal overhanging end of the bracket 9. In this embodiment, the sensor 10 is a Hall effect sensor, with its sensing end facing the edge of the drive gear 6 and its position precisely corresponding to the rotation trajectory of the magnetic column 11. When the folding fan 2 returns to a position flush with the fixed fan 1, the magnetic column 11 rotates exactly into the sensing area directly below the sensor 10. After the sensor 10 detects the magnetic field signal, it can determine that the folding fan 2 has returned to the correct position, and then send a signal to the revolving door control system to control the electromagnetic clutch 7 to be energized and locked.

[0038] In one embodiment, a square anti-rotation post 14 is fixedly installed at the lower end of the drive shaft 8. The square anti-rotation post 14 has a square cross-section and is integrally machined coaxially with the drive shaft 8. A door hinge clamping assembly 20 is correspondingly provided on the inner top of the folding fan 2 for fastening to the square anti-rotation post 14 to achieve reliable torque transmission. Specifically, the door hinge clamping assembly 20 includes a door hinge clamping seat 23 and a door hinge clamping block 22. On the opposite side of the door hinge clamping seat 23 and the door hinge clamping block 22, a square groove adapted to the outer dimensions of the square anti-rotation post 14 is provided. After the two grooves are aligned, a square cavity with an interference fit is formed with the square anti-rotation post 14. The square anti-rotation post 14 is embedded in the cavity, and the square cross-section restricts circumferential rotation, fundamentally avoiding slippage and free rotation between the drive shaft 8 and the folding fan 2.

[0039] Both ends of the door hinge clamping block 22 are provided with lateral fixing bolts 21. The screw ends of the lateral fixing bolts 21 face the door hinge clamping seat 23 and are threadedly connected to the threaded holes on the door hinge clamping seat 23. Tightening the lateral fixing bolts 21 will drive the door hinge clamping block 22 to move smoothly towards the door hinge clamping seat 23, and firmly clamp the square anti-rotation post 14 in the middle. Multiple sets of door leaf fixing bolts 24 are provided through the inner end face of the door hinge clamping seat 23. The ends of the door leaf fixing bolts 24 are screwed into the pre-made threaded holes in the inner vertical frame of the folding fan 2, and the door hinge clamping seat 23 is firmly fixed to the top of the vertical frame of the folding fan 2, thereby realizing the rigid connection between the drive shaft 8 and the folding fan 2.

[0040] In one embodiment, a horizontally extending support member 16 is fixedly installed at the outer end of the bottom of the fixed fan 1, away from the central shaft 12. The outer end of the support member 16 has a vertically penetrating shaft hole 17, into which a wear-resistant bushing can be embedded to improve service life. At the inner corner of the bottom of the folding fan 2, an L-shaped lower corner bracket 19 is fixedly installed. The lower corner bracket 19 can enhance the structural strength of the corner of the door leaf. A coaxial pin 18 is protruding downward from the bottom of its horizontal plate. The pin 18 rotates downward and is inserted into the shaft hole 17 of the support member 16, forming a rotation support point at the bottom of the folding fan 2. This bottom rotation support point is strictly coaxial with the top drive shaft 8, so that the folding fan 2 can rotate smoothly around the vertical axis, avoiding swaying or jamming.

[0041] In one embodiment, door gap brushes 15 are installed at the opposite edges of the upper and lower ends of the fixed fan 1 and the folding fan 2. The door gap brushes 15 extend along the horizontal length of the door fan and can fill the splicing gap between the fixed fan 1 and the folding fan 2. This can not only improve the overall dustproof, windproof, soundproof and heat insulation effect of the door fan, but also prevent foreign objects from getting stuck in the gap of the door fan and ensure that the door fan rotates smoothly.

[0042] In one embodiment, the device further includes an annular revolving door outer wall 25 coaxially arranged with the central axis 12. The revolving door outer wall 25 surrounds the outer periphery of the revolving door leaf. After being connected and fixed with the revolving door cap assembly, the revolving door outer wall 25 becomes a fixed structural part of the revolving door. It is installed in the opening of the building passage. An indoor entrance and an outdoor exit are respectively opened on opposite sides of the revolving door outer wall 25. Pedestrians enter and exit the revolving door area through the entrance and exit to complete the passage to and from the building.

[0043] The assembly of this device can be performed according to the following steps:

[0044] 1. Pre-assemble the main frame: Assemble the upper and lower ends of the central shaft 12 with the top and bottom bearing seats. Fix multiple sets of fixed fans 1 evenly on the outer wall of the central shaft 12 in a circumferential direction. Install the outer wall assembly on the ground of the door area along the axis of the central shaft 12. Connect and fix the support beam of the cap assembly to the column of the outer wall assembly with screws to complete the installation and coaxiality calibration of the main frame of the door.

[0045] 2. Integrated stopping mechanism module: The electromagnetic clutch 7, drive shaft 8, drive gear 6, floor spring 4, driven gear 5, bracket 9, sensor 10, and magnetic column 11 are pre-integrated and installed on the base plate 3 to form a complete stopping mechanism module; during assembly, the meshing clearance between the drive gear 6 and the driven gears 5 on both sides is adjusted to a suitable range, and the damping force and stopping angle are pre-adjusted according to the product instructions of the floor spring 4.

[0046] 3. Install the top module: Fix the assembled base plate 3 to the outer end of the top of the fixed fan 1 using fixing bolts 13, and adjust the position to ensure that the drive shaft 8 is strictly coaxial with the design installation axis of the folding fan 2.

[0047] 4. Install the bottom support structure: Fix the support 16 to the outer end of the bottom of the fixed fan 1, and calibrate the position of the shaft hole 17 so that it is coaxially aligned with the upper drive shaft 8.

[0048] 5. Install folding fan 2: First, align the pin 18 at the bottom of folding fan 2 with the shaft hole 17 of the insert support 16 to complete the bottom positioning; then separate the door hinge clamping seat 23 at the top of folding fan 2 from the door hinge clamping block 22, insert the square anti-rotation post 14 at the lower end of the drive shaft 8 into the groove, tighten the side fixing bolts 21 in sequence to clamp the square anti-rotation post 14, and finally tighten the door leaf fixing bolts 24 to secure the door hinge clamping assembly 20 to folding fan 2, thus completing the installation of a single folding fan 2.

[0049] 6. Overall debugging: After completing the installation of all folding fans 2 by repeating the above steps, turn on the control circuit and debug the signal linkage logic between the electromagnetic clutch 7 and the sensor 10 to ensure that the clutch can lock accurately and in time after the folding fan 2 is reset. At the same time, manually test the opening and resetting feel of the folding fan 2 and fine-tune the damping force of the ground spring 4 to the optimal state.

[0050] The working process and principle of the device

[0051] This device has two operating modes: normal rotation mode and emergency evacuation folding mode. The two modes can be flexibly switched according to usage requirements. The specific working process is as follows:

[0052] I. Normal Rotation Operation Mode

[0053] When in normal passage mode, the folding fan 2 and the fixed fan 1 remain flush, together forming a complete revolving door fan surface. At this time, the electromagnetic clutch 7 is in the energized holding state, locking the drive shaft 8 and the base plate 3 together. The drive shaft 8 cannot rotate relative to the fixed fan 1, so the folding fan 2 and the fixed fan 1 remain rigidly fixed relative to each other.

[0054] Driven by the top drive motor, the central shaft 12 rotates at a constant speed, causing all the fixed doors 1 and folding doors 2 to revolve synchronously around the central shaft 12. Pedestrians enter the door area from the indoor entrance and exit through the outdoor exit as the doors rotate, achieving orderly and smooth passage. In this mode, both the driving gear 6 and the driven gear 5 revolve synchronously with the fixed doors 1 without relative rotation, and the floor spring 4 remains in its initial reset state.

[0055] II. Emergency Evacuation Folding Mode

[0056] In the event of an emergency such as a fire, or upon receiving a fire alarm signal or pressing the emergency stop button, the main power supply to the revolving door is cut off, and the entire system stops operating. Simultaneously, the electromagnetic clutch 7 is de-energized and released, releasing the lock on the drive shaft 8 and completely freeing the rotational freedom of the drive shaft 8.

[0057] At this time, pedestrians on the indoor side can push the folding fan 2 outward in the escape direction. The folding fan 2 rotates outward relative to the fixed fan 1, with the vertical axis formed by the top drive shaft 8 and the bottom pin 18 as the pivot. While the folding fan 2 rotates, the door hinge clamping assembly 20 and the square anti-rotation post 14 drive the drive shaft 8 to rotate synchronously. The drive gear 6 at the upper end of the drive shaft 8 rotates accordingly. The drive gear 6 drives the driven gears 5 on both sides to rotate synchronously through meshing transmission. The driven gears 5 drive the output shaft of the floor spring 4 to rotate. The hydraulic mechanism inside the floor spring 4 starts to work, providing uniform and linear damping force, so that the opening process of the folding fan 2 is smooth and shock-free, and will not be damaged by excessive force.

[0058] When the folding fan 2 rotates outward to the preset opening angle, the stopping mechanism inside the floor spring 4 is triggered, entering the gear lock state and preventing the output shaft from continuing to rotate. This, in turn, restricts the rotation of the drive shaft 8 and the folding fan 2 via the gear set, ensuring the folding fan 2 remains stably at the opening angle and will not automatically rebound or continue rotating due to external force. At this time, a wide evacuation passage is formed between the folding fan 2 and the fixed fan 1, allowing pedestrians to quickly evacuate, fully meeting the requirements for passage width and safety during fire escape.

[0059] During this process, the damping force of the floor spring 4 can be adjusted in advance according to the weight of the door to ensure that the manual pushing force is moderate, and that the elderly and children can easily push it open, thus maximizing the efficiency and safety of emergency evacuation.

[0060] III. Restore normal operating mode

[0061] When the danger is over and the revolving door needs to be restored to normal operation, the staff can apply an inward pushing force to the folding fan 2. After the stop position of the ground spring 4 is triggered and released by the external force, the reset spring and hydraulic mechanism inside the ground spring 4 begin to provide auxiliary reset force, driving the driven gear 5 to rotate in the opposite direction at a uniform speed. Then, through the drive gear 6 and the transmission shaft 8, the folding fan 2 is automatically and smoothly rotated in the closing direction until the folding fan 2 and the fixed fan 1 are restored to a level state.

[0062] When the folding fan 2 is fully reset to the position flush with the fixed fan 1, the magnetic column 11 on the drive gear 6 rotates precisely into the sensing area of ​​the sensor 10. After detecting the magnetic signal, the sensor 10 sends a reset signal to the control system. The control system then controls the electromagnetic clutch 7 to energize the brake, locking the drive shaft 8 again, thus restoring the rigid connection between the folding fan 2 and the fixed fan 1. At this time, the main power supply of the revolving door is turned on, and the start button is pressed or the start signal is triggered by the entrance sensor 10. The folding revolving door can then re-enter the normal rotating operation mode and resume its daily passage function.

[0063] This invention relates to a gear-driven stopping mechanism for folding doors. Firstly, it employs a gear-driven transmission combined with a mature floor spring 4 for stopping, eliminating easily damaged components such as traditional sliders and compression springs, significantly simplifying the overall structure. The high precision of the gear transmission, combined with the floor spring 4's locking mechanism, ensures stable stopping without the risk of automatic disengagement, significantly improving reliability. Secondly, the damping force of the floor spring 4 is flexibly adjustable to adapt to doors of different sizes and weights, providing moderate opening force for easy opening in emergencies, especially suitable for large-sized folding revolving doors. Thirdly, the mechanism is integrated into the top of the door leaf, providing ample space for inspection and maintenance. The gears and floor spring 4 experience minimal wear and have a long service life, significantly reducing maintenance costs. Fourthly, the floor spring 4 provides auxiliary reset force, working with magnetic induction and an electromagnetic clutch 7 to achieve automatic locking upon reaching the correct position, facilitating convenient switching of operating modes. Coaxial upper and lower supports and an anti-rotation structure ensure smooth door leaf rotation and reliable torque transmission.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gear set stopping mechanism for a folding door, characterized in that, The device includes a central shaft. Multiple fixed fans are arranged radially along the outer wall of the central shaft, evenly distributed circumferentially. A base plate is fixedly connected to the top of each fixed fan away from the central shaft via bolts. A drive shaft is rotatably connected to the center of the base plate. A folding fan that rotates synchronously with the drive shaft is located at the lower end of the drive shaft. A drive gear is located at the upper end of the drive shaft. Floor springs are located on both sides of the base plate, with driven gears meshing with the drive gears at their ends. A square anti-rotation post is located at the lower end of the drive shaft. A door hinge clamping assembly that mates with the square anti-rotation post is located at the top of the folding fan. A support member is located at the bottom of each fixed fan, with a shaft hole at its end. A lower corner bracket is located at the bottom corner of the folding fan, with a pin at its bottom that mates with the shaft hole.

2. The gear set stopping mechanism device for a folding door according to claim 1, characterized in that, An electromagnetic clutch is fitted around the outside of the drive shaft, a magnetic column is provided on the outer extension of the drive gear, a bracket is provided on the base plate, and an inductor that cooperates with the magnetic column is provided at the end of the bracket.

3. The gear set stopping mechanism device for a folding door according to claim 1, characterized in that, The door hinge clamping assembly includes a door hinge clamping seat and a door hinge clamping block that are configured to cooperate with each other. The square anti-rotation post is disposed between the door hinge clamping block and the door hinge clamping seat. The door hinge clamping block and the door hinge clamping seat have a groove with the square anti-rotation post having the same outer dimensions.

4. The gear set stopping mechanism device for a folding door according to claim 3, characterized in that, The end of the door hinge clamping block is provided with a lateral fixing bolt that is threadedly connected to the door hinge clamping seat, and the side of the door hinge clamping seat is provided with a door leaf fixing bolt that is threadedly connected to the folding fan.

5. A gear set stopping mechanism device for a folding door according to claim 1, characterized in that, Both the fixed fan and the folding fan are equipped with door seam brushes on their upper and lower sides.

6. A gear set stopping mechanism device for a folding door according to claim 1, characterized in that, It also includes the outer wall of the revolving door, which is coaxial with the central axis, and entrances and exits are provided on both sides of the outer wall of the revolving door.

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