A silent flexible automatic door and lifting method

Abstract

The present invention discloses a silent flexible automatic door and a lifting method. In view of the problem that the existing manual lifting is required and noise is easily generated, the following scheme is proposed, wherein the automatic door comprises a winding shell, a sliding frame connected to an opening at the bottom of the winding shell, a winding drum rotatably connected inside the winding shell, and a flexible door panel wound inside the winding drum, wherein the bottom end of the winding shell is bolted to a bracket, and the bracket is rotatably sleeved with the winding drum; a fan-shaped toothed disc is hinged on the top of the bracket surface, a pinion is meshed with the bottom of the fan-shaped toothed disc, and the axis of the pinion is bolted to the front end of the winding drum, and a force for rotation can be given to the winding drum through the transmission of the structure, so that the winding drum can wind up the flexible door panel or release the flexible door panel downward, thereby eliminating the need for manual movement and facilitating user operation, and the active roller can drive the flexible door panel to move, giving the flexible door panel power, thereby avoiding bending and friction of the flexible door panel and reducing noise.

Description

Technical Field

[0001] The present invention relates to the technical field of door tools, and in particular to a silent flexible automatic door and a lifting method thereof. Background Art

[0002] The patent with application number 201780035056.2 discloses an automatic door, an automatic door sensor and an automatic door opening and closing method. Within a specified range of the door opening stroke when the door opens toward the rear side, when the first sensor detects a person or an object, the automatic door performs a specified action. The first sensor is provided with a detection area on the rear side of the door for detecting people and objects, wherein the detection area is only provided near the rear side of the door.

[0003] However, there are also some problems with the automatic door, the automatic door sensor and the method for opening and closing the automatic door. For example, the current device requires manual lifting of the rolling door, which requires a lot of effort. Moreover, the lifting part of the rolling door can only move passively during the lifting process, which makes it easy to bend and rub against the inside of the device, thereby generating noise. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a silent flexible automatic door and a lifting method.

[0005] The present invention provides a silent flexible automatic door, comprising a winding shell, a sliding frame connected to an opening at the bottom of the winding shell, a winding drum rotatably connected inside the winding shell, and a flexible door panel wound inside the winding drum, wherein a bracket is connected to the bottom end of the winding shell by bolts, and the bracket is rotatably sleeved with the winding drum;

[0006] The top of the bracket surface is hinged with a sector-shaped toothed disc, the bottom of the sector-shaped toothed disc is meshed with a pinion, and the axis of the pinion is connected with the front end bolt of the winding drum;

[0007] An active roller is rotatably sleeved on the hole at the bottom left end of the bracket, and the left side of the active roller contacts the right side of the flexible door panel, the front end of the active roller extends to the front side of the bracket and is bolted to a passive wheel, and the right side of the bracket surface is bolted to a power mechanism, which is transmission-connected to the passive wheel, and the left end of the power mechanism is bolted to a transmission mechanism, which is slidingly connected to the fan-shaped gear disk. The transmission of the structure can give the winding drum a force to rotate, so that the winding drum can reel in the flexible door panel or release the flexible door panel downward, thereby eliminating the need for manual movement and facilitating user operation, and the active roller can drive the flexible door panel to move, giving the flexible door panel power, thereby avoiding bending and friction of the flexible door panel and reducing noise.

[0008] Preferably, the power mechanism comprises a reduction motor, a worm, a worm wheel and a transmission assembly;

[0009] The rear side of the reduction motor is bolted to the right side of the bracket surface, the output end of the reduction motor is bolted to the right end of the worm, the surface of the worm is meshed with the bottom of the worm wheel, the worm wheel is bolted to the transmission assembly, the transmission assembly is connected to the passive wheel transmission, the worm is bolted to the transmission mechanism, the power of the reduction motor is turned on, the reduction motor is fixed by the bracket, the vibration of the reduction motor is reduced, and the long-term operation of the reduction motor is convenient. The reduction motor can drive the worm to rotate, the worm can drive the transmission mechanism to rotate, and the worm can drive the worm wheel to rotate.

[0010] Preferably, the transmission assembly includes a large sprocket, a chain, a small sprocket and a pulley assembly;

[0011] The rear side of the worm wheel is connected to the surface of the large sprocket by bolts, the axis of the large sprocket is rotatably connected to the surface of the bracket, the teeth of the large sprocket are meshed with the top end of the chain, the bottom end of the chain is meshed with the teeth of the small sprocket, the small sprocket is bolted to the pulley assembly, the pulley assembly is connected to the passive wheel transmission, the worm wheel can drive the large sprocket to rotate counterclockwise, the large sprocket is rotatably arranged with the bracket through the bearing to ensure the stability of the rotation of the large sprocket, the large sprocket can drive the chain to rotate counterclockwise, the chain can drive the small sprocket to rotate counterclockwise, and the small sprocket can drive the pulley assembly to rotate counterclockwise.

[0012] Preferably, the pulley assembly comprises a driving pulley and a transmission belt;

[0013] The rear side of the small sprocket is connected to the surface of the driving wheel by bolts, the axis of the driving wheel is rotatably connected to the surface of the bracket, the inside of the driving wheel is connected to the right side of the inside of the transmission belt, and the left side of the inside of the transmission belt is connected to the inside of the passive wheel. The small sprocket can drive the driving wheel to rotate counterclockwise, and the driving wheel is rotatably arranged with the bracket through the bearing. The driving wheel can drive the transmission belt to rotate counterclockwise, and the transmission belt can drive the passive wheel to rotate counterclockwise.

[0014] Preferably, the transmission mechanism includes a screw rod, a rack, a transmission gear, a transmission frame and a hinge assembly;

[0015] The right end of the lead screw is bolted to the left end of the worm, the surface of the lead screw is threadedly connected to the screw hole of the rack, the top of the rack is meshed with the bottom of the transmission gear, the rear side of the transmission gear is bolted to the bottom end of the transmission frame, the transmission frame is hinged to the hinge assembly, the hinge assembly is slidingly connected to the fan-shaped gear disk, the worm can drive the lead screw to rotate, the lead screw can drive the rack to move to the left, the rack can drive the transmission gear to rotate clockwise, the transmission gear can drive the transmission frame to rotate to the right, and the transmission frame can drive the articulated frame to move to the right.

[0016] Preferably, the hinge assembly comprises a hinge frame, a transmission bar and a slide frame;

[0017] The top end of the transmission frame is hinged to the left end of the articulated frame, the right end of the articulated frame is hinged to the left end of the transmission bar, the right end of the transmission bar surface is hinged to the rear side of the sliding frame, the interior of the sliding frame is slidingly connected to the rear side of the fan-shaped toothed disk, the transmission frame can drive the articulated frame to move to the right, the articulated frame can drive the transmission bar to move to the right, the transmission bar can drive the sliding frame to move to the right, the sliding frame can slide on the rear side of the fan-shaped toothed disk and drive the fan-shaped toothed disk to rotate clockwise.

[0018] Preferably, the rear side of the rack is slidingly connected to the limit frame, the rear side of the limit frame is bolted to the surface of the bracket, both ends of the screw rod are rotatably sleeved with the surface of the bracket, the hole at the bottom end of the transmission frame is rotatably connected to the surface of the bracket, the rack is slidably arranged with the limit frame through a slide groove to guide the rack, so that the rack can drive the transmission gear to rotate, the screw rod is rotatably arranged with the bracket through a bearing to facilitate the normal operation of the screw rod, and the transmission frame is vibrated with the bracket through a bearing.

[0019] Preferably, the rear side of the transmission bar is slidably connected to a stabilizing frame, the rear side of the stabilizing frame is bolted to the surface of the bracket, a sliding bar is integrally processed at the top of the fan-shaped toothed disk, the sliding bar of the fan-shaped toothed disk is slidably connected to the inside of the sliding frame, the transmission bar is slidably arranged with the stabilizing frame through a sliding groove, the transmission bar is guided, and it is convenient for the transmission bar to drive the sliding frame to move, the sliding frame slides on the rear side of the sliding bar, and the sliding bar is slidably arranged with the sliding frame through the sliding groove.

[0020] Preferably, the winding shell is rotatably connected to limit rollers on all sides, the inner side of the limit rollers is slidably connected to the outer side of the winding drum, the bottom of the winding shell is welded to the top of the sliding frame, the sliding frame is rotatably connected to a guide wheel inside, the surface of the guide wheel is slidably connected to the side of the flexible door panel, the limit rollers are rotatably arranged with the winding shell through bearings, and multiple limit rollers surround the winding drum to facilitate limiting the flexible door panel inside the winding drum and moving the flexible door panel, and the guide wheels are used to guide the flexible door panel to reduce friction and noise.

[0021] The present invention also proposes a method for lifting and lowering a silent flexible automatic door, comprising the following steps:

[0022] S1: The winding shell is installed on the top of the door frame, and there are two sliding frames. The sides of the two sliding frames are connected to the front and rear sides of the door frame of the building;

[0023] S2: The power mechanism can drive the fan-shaped toothed disc to rotate through the transmission mechanism, and the fan-shaped toothed disc can drive the winding drum to rotate through the pinion gear, and the winding drum can release the flexible door panel downward;

[0024] S3: The power mechanism can drive the passive wheel to rotate, the passive wheel can drive the active roller to rotate, and the active roller can drive the flexible door panel to move downward.

[0025] The beneficial effects of the present invention are:

[0026] 1. The power mechanism can drive the fan-shaped toothed disc to rotate through the transmission mechanism, the fan-shaped toothed disc can drive the winding drum to rotate through the pinion, and the winding drum can drive the flexible door panel;

[0027] 2. The power mechanism can drive the passive wheel to rotate, the passive wheel can drive the active roller to rotate, and the active roller can drive the flexible door panel to move;

[0028] The transmission of the structure can give the winding drum a force to rotate, so that the winding drum can roll up the flexible door panel or let it out downward, which eliminates the need for manual movement and facilitates user operation. The active roller can drive the flexible door panel to move, giving the flexible door panel power, avoiding bending and friction of the flexible door panel and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A front view structural schematic diagram of a silent flexible automatic door and a lifting method proposed by the present invention;

[0030] Figure 2 A schematic diagram of the power mechanism structure of a silent flexible automatic door and a lifting method proposed by the present invention;

[0031] Figure 3 A schematic diagram of the left-side structure of a worm gear of a silent flexible automatic door and a lifting method proposed by the present invention;

[0032] Figure 4 A three-dimensional schematic diagram of a rack of a silent flexible automatic door and a lifting method proposed by the present invention;

[0033] Figure 5 A three-dimensional schematic diagram of a fan-shaped toothed disc of a silent flexible automatic door and a lifting method proposed by the present invention.

[0034] In the figure: 1. winding shell; 2. power mechanism; 21. reduction motor; 22. worm; 23. worm wheel; 24. large sprocket; 25. chain; 26. small sprocket; 27. driving wheel; 28. transmission belt; 3. transmission mechanism; 31. screw; 32. rack; 33. transmission gear; 34. transmission frame; 35. articulated frame; 36. transmission bar; 37. sliding frame; 4. sliding frame; 5. winding drum; 6. flexible door panel; 7. fan-shaped toothed disc; 8. small gear; 9. passive wheel; 10. driving roller; 11. bracket. DETAILED DESCRIPTION

[0035] The present invention will be further explained below in conjunction with specific embodiments.

[0036] Example

[0037] refer to Figure 1-5In this embodiment, a silent flexible automatic door is proposed, comprising a winding shell 1, a sliding frame 4 connected to an opening at the bottom of the winding shell 1, a winding drum 5 rotatably connected inside the winding shell 1, and a flexible door panel 6 wound inside the winding drum 5. The bottom end of the winding shell 1 is bolted to a bracket 11, and the hole on the rear side of the bracket 11 is rotatably sleeved with the front end of the winding drum 5; the top of the surface of the bracket 11 is hinged with a fan-shaped toothed disc 7, and the bottom of the fan-shaped toothed disc 7 is meshed with a pinion 8, and the axis of the pinion 8 is bolted to the front end of the winding drum 5; the hole at the bottom end of the left side of the bracket 11 is rotatably sleeved with an active roller 10, and the left side of the active roller 10 contacts the right side of the flexible door panel 6. The front end of the active roller 10 extends to the front side of the bracket 11 and is bolted to the passive wheel 9. The right side of the surface of the bracket 11 is bolted to the power mechanism 2, which is transmission-connected to the passive wheel 9. The left end of the power mechanism 2 is bolted to the transmission mechanism 3, which is slidingly connected to the fan-shaped toothed disc 7. The power mechanism 2 includes a reduction motor 21, a worm 22, a worm wheel 23 and a transmission assembly; the rear side of the reduction motor 21 is bolted to the right side of the surface of the bracket 11, the output end of the reduction motor 21 is bolted to the right end of the worm 22, the surface of the worm 22 is meshed with the bottom of the worm wheel 23, the worm wheel 23 is bolted to the transmission assembly, and the transmission assembly is connected to the driven wheel 9. The driven wheel 9 is connected in transmission, the worm 22 is bolted to the transmission mechanism 3, the power of the reduction motor 21 is turned on, and the reduction motor 21 is fixed by the bracket 11 to reduce the vibration of the reduction motor 21 and facilitate the long-term operation of the reduction motor 21. The reduction motor 21 can drive the worm 22 to rotate, the worm 22 can drive the transmission mechanism 3 to rotate, the worm 22 can drive the worm wheel 23 to rotate, the worm wheel 23 can drive the transmission assembly to rotate, and the transmission assembly can drive the driven wheel 9 to rotate. The transmission assembly includes a large sprocket 24, a chain 25, a small sprocket 26 and a pulley assembly; the rear side of the worm wheel 23 is bolted to the surface of the large sprocket 24, and the axis of the large sprocket 24 is connected to the belt pulley assembly. The surface of the bracket 11 is rotatably connected, the teeth of the large sprocket 24 mesh with the top of the chain 25, the bottom of the chain 25 meshes with the teeth of the small sprocket 26, the small sprocket 26 is bolted to the pulley assembly, the pulley assembly is transmission-connected to the passive wheel 9, the worm wheel 23 can drive the large sprocket 24 to rotate, the large sprocket 24 is rotationally arranged with the bracket 11 through the bearing, and the stability of the rotation of the large sprocket 24 is ensured, the large sprocket 24 can drive the chain 25 to rotate, the chain 25 can drive the small sprocket 26 to rotate, the small sprocket 26 can drive the pulley assembly to rotate, the pulley assembly can drive the passive wheel 9 to rotate, and the pulley assembly includes a driving wheel 27 and a transmission belt 28;The rear side of the small sprocket 26 is connected with the surface bolts of the driving wheel 27, the axis of the driving wheel 27 is connected to the surface of the bracket 11 for rotation, the inside of the driving wheel 27 is connected to the right side of the transmission belt 28 for transmission, and the left side of the transmission belt 28 is connected to the inside of the passive wheel 9 for transmission, the small sprocket 26 can drive the driving wheel 27 to rotate, the driving wheel 27 is rotatably arranged with the bracket 11 through the bearing, the driving wheel 27 can drive the transmission belt 28 to rotate, and the transmission belt 28 can drive the passive wheel 9 to rotate, the size of the driving wheel 27 is larger than that of the passive wheel 9, and an acceleration effect can be generated, the transmission mechanism 3 includes a screw rod 31, a rack 32, a transmission gear 33, a transmission frame 34 and a hinge assembly; the screw rod 31 The right end is bolted to the left end of the worm 22, the surface of the lead screw 31 is threadedly connected to the screw hole of the rack 32, the top of the rack 32 is meshed with the bottom of the transmission gear 33, the rear side of the transmission gear 33 is bolted to the bottom end of the transmission frame 34, the transmission frame 34 is hinged to the hinge assembly, the hinge assembly is slidably connected to the fan-shaped toothed disk 7, the worm 22 can drive the lead screw 31 to rotate, the lead screw 31 can drive the rack 32 to move, the rack 32 can drive the transmission gear 33 to rotate, the transmission gear 33 can drive the transmission frame 34 to rotate, the transmission frame 34 can drive the hinge assembly to move, the hinge assembly can drive the fan-shaped toothed disk 7 to rotate, the hinge assembly includes a hinge frame 35, a transmission bar 36 and a sliding frame 37;The top end of the transmission frame 34 is hinged to the left end of the articulated frame 35, the right end of the articulated frame 35 is hinged to the left end of the transmission bar 36, the right end of the surface of the transmission bar 36 is hinged to the rear side of the slide frame 37, the interior of the slide frame 37 is slidably connected to the rear side of the fan-shaped toothed disk 7, the transmission frame 34 can drive the articulated frame 35 to move, the articulated frame 35 can drive the transmission bar 36 to move, the transmission bar 36 can drive the slide frame 37 to move, the slide frame 37 can slide on the rear side of the fan-shaped toothed disk 7 and drive the fan-shaped toothed disk 7 to rotate, the rear side of the rack 32 is slidably connected to the limited position frame, the rear side of the limit frame is bolted to the surface of the bracket 11 The two ends of the screw rod 31 are rotatably connected with the surface of the bracket 11, the hole at the bottom of the transmission frame 34 is rotatably connected with the surface of the bracket 11, the rack 32 is slidably set with the limit frame through the slide groove, and the rack 32 is guided to facilitate the rack 32 to drive the transmission gear 33 to rotate, the screw rod 31 is rotatably set with the bracket 11 through the bearing, which is convenient for the normal operation of the screw rod 31, and the transmission frame 34 is vibrated with the bracket 11 through the bearing. The rear side of the transmission bar 36 is slidably connected with the stabilizing frame, and the rear side of the stabilizing frame is bolted to the surface of the bracket 11. The top of the fan-shaped toothed disc 7 is integrally processed with a slide bar. The slide bar of the fan-shaped toothed disc 7 is slidably connected to the inside of the slide frame 37, and the transmission bar 36 is slidably arranged with the stabilizing frame through the slide groove to guide the transmission bar 36, so that the transmission bar 36 drives the slide frame 37 to move, and the slide frame 37 slides on the rear side of the slide bar, and the slide bar is slidably arranged with the slide frame 37 through the slide groove. The inside of the winding shell 1 is rotatably connected with the limiting roller all around, and the inner side of the limiting roller is slidably connected with the outer side of the winding drum 5. The bottom of the winding shell 1 is welded to the top of the sliding frame 4, and the inside of the sliding frame 4 is rotatably connected with a guide wheel, and the surface of the guide wheel is slidably connected with the side of the flexible door panel 6. The limiting roller is connected with the guide wheel through the sliding groove. The bearing and the winding shell 1 are rotatably arranged, and a plurality of limiting rollers surround the winding drum 5, which is convenient for limiting the flexible door panel 6 inside the winding drum 5 and facilitating the movement of the flexible door panel 6. The guide wheel is used to guide the flexible door panel 6 to reduce friction and noise. The transmission of the structure can give the winding drum 5 a rotating force, so that the winding drum 5 can reel in the flexible door panel 6 or release the flexible door panel 6 downward, so that there is no need for manual movement, which is convenient for users to operate. The active roller 10 can drive the flexible door panel 6 to move, giving the flexible door panel 6 power, avoiding the bending of the flexible door panel 6 and friction, and reducing noise. ;

[0038] The present invention also proposes a method for lifting and lowering a silent flexible automatic door, comprising the following steps:

[0039] S1: The winding shell 1 is installed on the top of the door frame, the number of sliding frames 4 is two, and the sides of the two sliding frames 4 are connected to the front and rear sides of the door frame of the building;

[0040] S2: The power mechanism 2 can drive the fan-shaped toothed disc 7 to rotate through the transmission mechanism 3, and the fan-shaped toothed disc 7 can drive the winding drum 5 to rotate through the pinion 8, and the winding drum 5 can release the flexible door panel 6 downward;

[0041] S3: The power mechanism 2 can drive the passive wheel 9 to rotate, the passive wheel 9 can drive the active roller 10 to rotate, and the active roller 10 can drive the flexible door panel 6 to move downward.

[0042] Working principle: the winding shell 1 is installed on the top of the door frame of the building, the number of sliding frames 4 is two, the sides of the two sliding frames 4 are connected to the front and rear sides of the door frame of the building, and the flexible door panel 6 needs to be released downward. The rolling door structure is between the winding drum 5 and the flexible door panel 6, and the power supply of the reduction motor 21 is turned on. The reduction motor 21 is fixed by the bracket 11 to reduce the vibration of the reduction motor 21 and facilitate the long-term operation of the reduction motor 21. The reduction motor 21 can drive the worm 22 to rotate, and the worm 22 can drive the lead screw 31 to rotate. The lead screw 31 can drive the rack 32 to move to the left, and the rack 32 can drive the transmission gear 33 to rotate clockwise. The transmission gear 33 can drive the transmission frame 34 to rotate to the right, and the transmission frame 34 can drive the articulated frame 35 to move to the right, and the articulated frame 35 can drive the transmission bar 36 to move to the right, and the transmission bar 36 can drive the sliding frame 37 to move to the right. The sliding frame 37 can slide on the rear side of the fan-shaped toothed disc 7 and drive the fan-shaped toothed disc 7 to rotate clockwise. The fan-shaped toothed disc 7 can drive the small The gear 8 rotates counterclockwise, the small gear 8 can drive the winding drum 5 to rotate counterclockwise, the winding drum 5 is rotated by the bearing and the winding shell 1, and the winding drum 5 can release the flexible door plate 6 wound and rolled inside downward. At the same time, the worm 22 can drive the worm wheel 23 to rotate counterclockwise, and the worm wheel 23 can drive the large sprocket 24 to rotate counterclockwise. The large sprocket 24 is rotated by the bearing and the bracket 11 to ensure the stability of the rotation of the large sprocket 24. The large sprocket 24 can drive the chain 25 to rotate counterclockwise. The strip 25 can drive the small sprocket 26 to rotate counterclockwise, the small sprocket 26 can drive the driving wheel 27 to rotate counterclockwise, the driving wheel 27 is rotatably arranged through the bearing and the bracket 11, the driving wheel 27 can drive the transmission belt 28 to rotate counterclockwise, the transmission belt 28 can drive the passive wheel 9 to rotate counterclockwise, the passive wheel 9 can drive the active roller 10 to rotate counterclockwise, the active roller 10 can drive the flexible door panel 6 to move downward, giving the flexible door panel 6 an active downward force, and the flexible door panel 6 slides in the sliding frame 4.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A silent flexible automatic door, comprising a winding shell (1), a sliding frame (4) connected to the bottom opening of the winding shell (1), a winding drum (5) rotatably connected inside the winding shell (1), and a flexible door panel (6) wound inside the winding drum (5), characterized in that: The bottom end of the winding shell (1) is bolted to a bracket (11), and the bracket (11) is rotatably sleeved with the winding drum (5); A fan-shaped toothed disc (7) is hingedly connected to the top of the surface of the bracket (11), a pinion (8) is meshed with the bottom of the fan-shaped toothed disc (7), and the axis of the pinion (8) is bolted to the front end of the winding drum (5); A driving roller (10) is rotatably sleeved in a hole at the bottom left end of the bracket (11), the left side of the driving roller (10) contacts the right side of the flexible door panel (6), the front end of the driving roller (10) extends to the front side of the bracket (11) and is bolted to a passive wheel (9), the right side of the surface of the bracket (11) is bolted to a power mechanism (2), the power mechanism (2) is transmission-connected to the passive wheel (9), the left end of the power mechanism (2) is bolted to a transmission mechanism (3), and the transmission mechanism (3) is slidingly connected to the fan-shaped toothed disc (7); The power mechanism (2) comprises a reduction motor (21), a worm (22), a worm wheel (23) and a transmission assembly; The rear side of the reduction motor (21) is bolted to the right side of the surface of the bracket (11), the output end of the reduction motor (21) is bolted to the right end of the worm (22), the surface of the worm (22) is meshed with the bottom of the worm wheel (23), the worm wheel (23) is bolted to the transmission assembly, the transmission assembly is transmission-connected to the driven wheel (9), and the worm (22) is bolted to the transmission mechanism (3); The transmission assembly comprises a large sprocket (24), a chain (25), a small sprocket (26) and a pulley assembly; The rear side of the worm wheel (23) is bolted to the surface of the large sprocket (24), the axis of the large sprocket (24) is rotatably connected to the surface of the bracket (11), the teeth of the large sprocket (24) are meshed with the top of the chain (25), the bottom of the chain (25) is meshed with the teeth of the small sprocket (26), the small sprocket (26) is bolted to the pulley assembly, and the pulley assembly is drivingly connected to the driven wheel (9); The pulley assembly comprises a driving pulley (27) and a transmission belt (28); The rear side of the small sprocket (26) is bolted to the surface of the driving wheel (27), the axis of the driving wheel (27) is rotatably connected to the surface of the bracket (11), the inside of the driving wheel (27) is transmission-connected to the right side of the inside of the transmission belt (28), and the left side of the inside of the transmission belt (28) is transmission-connected to the inside of the driven wheel (9); The transmission mechanism (3) comprises a screw rod (31), a rack (32), a transmission gear (33), a transmission frame (34) and a hinge assembly; The right end of the screw rod (31) is bolted to the left end of the worm (22), the surface of the screw rod (31) is threadedly connected to the screw hole of the rack (32), the top of the rack (32) is meshed with the bottom of the transmission gear (33), the rear side of the transmission gear (33) is bolted to the bottom end of the transmission frame (34), the transmission frame (34) is hinged to the hinge assembly, and the hinge assembly is slidably connected to the fan-shaped toothed disc (7); The hinge assembly comprises a hinge frame (35), a transmission bar (36) and a sliding frame (37); The top end of the transmission frame (34) is hinged to the left end of the articulated frame (35), the right end of the articulated frame (35) is hinged to the left end of the transmission bar (36), the right end of the surface of the transmission bar (36) is hinged to the rear side of the slide frame (37), and the interior of the slide frame (37) is slidably connected to the rear side of the fan-shaped toothed disc (7).

2. A silent flexible automatic door according to claim 1, characterized in that: The rear side of the rack (32) is slidably connected to a limit frame, the rear side of the limit frame is bolted to the surface of the bracket (11), both ends of the screw rod (31) are rotatably sleeved to the surface of the bracket (11), and the hole at the bottom end of the transmission frame (34) is rotatably connected to the surface of the bracket (11).

3. A silent flexible automatic door according to claim 1, characterized in that: The rear side of the transmission bar (36) is slidably connected to a stabilizing frame, the rear side of the stabilizing frame is bolted to the surface of the bracket (11), the top of the fan-shaped toothed disc (7) is integrally processed with a sliding bar, and the sliding bar of the fan-shaped toothed disc (7) is slidably connected to the inside of the sliding frame (37).

4. A silent flexible automatic door according to claim 1, characterized in that: The winding shell (1) is rotatably connected to limit rollers on all sides, the inner side of the limit rollers is slidably connected to the outer side of the winding drum (5), the bottom of the winding shell (1) is welded to the top of the sliding frame (4), the interior of the sliding frame (4) is rotatably connected to a guide wheel, and the surface of the guide wheel is slidably connected to the side of the flexible door panel (6).

5. A method for lifting a silent flexible automatic door as claimed in claim 1, comprising the silent flexible automatic door as claimed in claim 1, characterized in that: The following steps are involved: S1: The winding shell (1) is installed on the top of the door frame, the number of sliding frames (4) is two, and the sides of the two sliding frames (4) are connected to the front side and the rear side of the door frame of the building; S2: The power mechanism (2) drives the fan-shaped toothed disc (7) to rotate through the transmission mechanism (3), and the fan-shaped toothed disc (7) drives the winding drum (5) to rotate through the pinion (8), and the winding drum (5) releases the flexible door panel (6) downward; S3: The power mechanism (2) drives the passive wheel (9) to rotate, and the passive wheel (9) drives the active roller (10) to rotate, so that the active roller (10) can drive the flexible door panel (6) to move downward.

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