Electric roller shutter door

Abstract

The application belongs to the technical field of rolling shutter door, and particularly relates to an electric rolling shutter door, which comprises curtain pieces, a track, a pressure feedback component, a winding wheel, a winding belt transmission assembly, a driving motor, a moving slide assembly, a compensation motor and a mounting bracket. The pressure feedback component is used for detecting the pressure of the curtain pieces. When the detected pressure value exceeds the normal range, the controller drives the compensation motor to work. The compensation motor drives the moving slide assembly to move on the mounting bracket through a screw-nut pair, and then adjusts the relative position between the winding wheel and the track. The tangent direction of the curtain pieces wound on the winding wheel is always coincident with the track, so that the abnormal extrusion force between the curtain pieces and the track is reduced, the curtain pieces can smoothly slide in the track, the stability and reliability of the electric rolling shutter door are improved, the curtain pieces are always vertically entered into the track along the tangent direction of the winding wheel, the friction between the curtain pieces and the inner wall of the track is also reduced, and the noise generation is reduced.

Description

Technical Field

[0001] This invention belongs to the field of roller shutter technology, specifically an electric roller shutter door. Background Technology

[0002] In existing electric roller shutters, the distance between the main shaft and the wall is usually set as a fixed size based on the maximum diameter of all the curtain slats after they are rolled up, and the track is arranged precisely along the tangential direction of the curtain roll-up at that maximum diameter. However, during the rolling and unrolling of the curtain slats, the rolling diameter changes, which makes it impossible for the curtain slats to enter and exit the track in a vertical position. Especially above the track, the movement trajectory of the curtain slats is always obliquely matched with the track.

[0003] This misalignment causes the tangential direction of the curtain slats winding on the take-up roller to no longer coincide with the track, resulting in abnormal compression and friction between the curtain slats and the inner wall of the track when entering and exiting. On the one hand, abnormal compression increases the load on the drive motor, consuming more energy and potentially shortening its lifespan due to overload, even leading to motor burnout in severe cases. On the other hand, excessive friction between the curtain slats and the inner wall of the track exacerbates wear on both, reducing the overall lifespan of the roller shutter door. Simultaneously, the friction process generates significant noise, affecting the surrounding environment. Furthermore, the curtain slats of traditional electric roller shutter doors have poor posture stability during winding and lowering, easily swaying or tilting, further aggravating the poor contact between the curtain slats and the track, leading to jerky and uneven operation, causing considerable inconvenience to users. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes an electric roller shutter door. This invention primarily addresses the problem that in existing roller shutter doors, the fixed winding roller causes the curtain slats to deviate from the track during winding. This deviation results in the tangential direction of the curtain slats winding around the winding roller no longer coinciding with the track, leading to abnormal compression and friction between the curtain slats and the inner wall of the track when entering and exiting the track.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides an electric roller shutter door, including a curtain slat, a track, a pressure feedback component, a winding wheel, a winding belt drive assembly, a drive motor, a movable slide assembly, a compensating motor, and a mounting bracket; the curtain slats are sequentially hinged, with one end of the hinged curtain slats sliding within the track symmetrically arranged on both sides, and the other end wound around the winding wheel symmetrically arranged on both sides; the curtain slats wound around the winding wheel enter the track along the tangent direction of the winding wheel, and a pressure feedback component is provided on one side of the tangent point; the pressure feedback component is used to detect the squeezing force of the curtain slats on it; the winding wheel is fixedly connected to the mounting plate of the movable slide assembly via an L-shaped bracket; the shaft of the winding wheel is connected to the shaft of the drive motor via the winding belt drive assembly; the drive motor is fixedly connected to the mounting plate of the movable slide assembly; the movable slide assembly is mounted on the mounting bracket; the movable slide assembly is connected to the shaft of the compensating motor via a screw and nut pair; the compensating motor is fixedly connected to the mounting bracket; one end of the mounting bracket is fixedly connected to the track.

[0006] Preferably, the hinge points between the curtain slats are offset towards one side of the winding wheel, and mutually abutting limiting platforms are provided on the other side; the limiting platforms restrict the maximum swing between adjacent curtain slats to be level; the non-hinge point side of the curtain slats is attached to a limiting baffle that is vertical and aligned with the track; the lower end of the limiting baffle is fixedly connected to the track; a limiting guide wheel is provided on the hinge point side of the curtain slats, which is pressed and attached to the curtain slats; the limiting guide wheel is rotatably connected to the track through a first support plate.

[0007] Preferably, the pressure feedback component includes a swing plate, a first spring, a support column, and a pressure sensor; a first groove is provided at the tangent point of the limiting baffle and the curtain slat; a second groove is provided at the lower end of the first groove; an inclined surface is provided between the middle of the first groove and the second groove; the swing plate is provided in the first groove; one side of the swing plate is flush with the limiting baffle when no external force is applied; a spherical groove is provided in the middle of the other side of the swing plate; the hemispherical surface of one end of the support column abuts against the spherical groove on the swing plate; the other end of the support column is fixedly connected to the pressure sensor; the pressure sensor is fixedly connected to the limiting baffle; one end of the lower end of the swing plate is connected to one end of the first spring; the other end of the first spring is connected to the second groove.

[0008] Preferably, a friction pull wheel is provided below the limiting guide wheel; the friction pull wheel is pressed and fitted against the side of the curtain slat; the friction pull wheel is rotatably connected to the first support plate; a ratchet is fixedly connected to the rotating shaft of the friction pull wheel; a pull pulley is connected to the ratchet; the pull pulley is connected to the first pulley via a first belt; the first pulley is fixedly connected to the rotating shaft connected to the drive motor.

[0009] Preferably, the friction pull wheel includes a friction wheel, an elastic support frame, and a support sleeve; the friction wheel is made of wear-resistant rubber; a first arc groove is evenly spaced along the circumference on the inner wall of the friction wheel; the support sleeve is disposed inside the friction wheel; a second arc groove is evenly spaced along the circumference on the outer surface of the support sleeve; the elastic support frame is disposed between the support sleeve and the friction wheel; the cross-section of the elastic support frame is an annular wavy tooth structure, with the peaks of the wavy teeth abutting in the first arc groove and the valleys of the wavy teeth abutting in the second arc groove.

[0010] Preferably, the lowermost slat is rotatably connected to a support wheel via a hinge seat on the side near the hinge point; the support wheel remains in contact with the inner wall of the track.

[0011] Preferably, a pressing block is fixedly connected to one side of the lowest curtain slat; a first rack is vertically arranged below the pressing block; the first rack is slidably connected in a groove on the side of the second support plate; the first rack meshes with one side of a gear, and the other side of the gear meshes with the vertically arranged second rack; the upper end of the second rack is fixedly connected to the lower end of the lowest push-pull plate, and the upper end of the lowest push-pull plate is fixedly connected to one end of an elastic arc plate; multiple sets of push-pull plates and elastic arc plates are alternately connected to the upper end of the elastic arc plate; the uppermost push-pull plate is fixedly connected to the track by a pin; the arching direction of the elastic arc plate faces the curtain slat; the push-pull plate is restricted from sliding along the inner wall of the track by a limiting plate fixedly connected to the inner wall of the track; the lower end of the second rack is connected to the lower end of the second spring through a third support plate; the upper end of the second spring abuts against the end of the track.

[0012] Preferably, the push-pull plate and the elastic arc plate are connected and fixed by a lateral insertion method.

[0013] Preferably, the lateral insertion method between the push-pull plate and the elastic arc plate is a dovetail groove connection or by setting anti-slip texture on the inner wall of the slot.

[0014] Preferably, the wall thickness of the elastic arc-shaped plate gradually increases along both ends.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. In this invention, during the winding or unwinding of the curtain slats, the pressure feedback component detects the squeezing force exerted on the curtain slats in real time. Because the number of turns of the curtain slats around the winding wheel varies, the diameter after winding also changes continuously, thus altering the squeezing force exerted on the pressure feedback component. At this time, the pressure feedback component transmits the detected pressure signal to the controller, which determines whether position compensation is needed based on a preset pressure threshold. When the detected pressure value exceeds the normal range, the controller drives the compensation motor. The compensation motor, through a screw and nut pair, moves the moving slide assembly on the mounting bracket, thereby moving the winding wheel and drive motor as a whole. This adjusts the relative position between the winding wheel and the track, ensuring that the tangential direction of the curtain slats winding on the winding wheel always coincides with the track, thereby reducing abnormal squeezing force between the curtain slats and the track. This ensures that the curtain slats can slide smoothly within the track, improving the stability and reliability of the electric roller shutter door operation. Furthermore, maintaining the curtain slats vertically into the track along the tangential direction on the winding wheel also reduces friction between the curtain slats and the inner wall of the track, thus reducing noise generation.

[0017] 2. This invention features a limiting guide wheel on one side of the hinge point of the curtain slats. When the curtain slats are rolled up or released, the limiting guide wheel presses against the curtain slats, guiding and limiting the hinge point side of the curtain slats, thus pressing the curtain slats against the opposite limiting baffle. Because the hinge point between the curtain slats is biased towards the winding wheel, when the curtain slats are released from the winding wheel and move downwards along the track, the limiting baffles on the other side abut against each other, limiting the maximum swing angle between adjacent curtain slats and keeping them aligned. This prevents the curtain slats from shifting left or right or twisting during descent, ensuring that the curtain slats fit neatly against the limiting baffles. The limiting baffles are vertically positioned and aligned with the track, providing stable guidance and support for the curtain slats, further ensuring the straightness of the curtain slats before entering the track. This prevents the curtain slats from colliding and rubbing against the track or other components due to hinge point offset during movement, reducing curtain wear, extending its service life, and also helping to maintain the smoothness of the curtain slat movement and reduce operating noise.

[0018] 3. In this invention, while the drive motor rotates the winding wheel to wind or release the curtain slats, its shaft simultaneously drives the first pulley to rotate synchronously. The first pulley drives the pulley pulley to rotate via the first belt. The pulley pulley is connected to a ratchet, which in turn drives the ratchet and friction pulley pulley to rotate. Because the friction pulley pulley is pressed and adhered to the side of the curtain slats, when the curtain slats are released and descend, the friction pulley pulley generates a downward frictional force on the hinge point side of the curtain slats during rotation, forming a pulling effect. At the same time, combined with the guide wheel guiding and limiting the hinge point side of the curtain slats, the non-hinge point side of the curtain slats can be more tightly adhered to the limit baffle during descent, avoiding local warping or displacement caused by uneven weight distribution of the curtain slats or changes in descent speed. When the curtain slats are wound and rising, the ratchet structure prevents the pulley pulley from driving the friction pulley pulley to rotate in the opposite direction via the ratchet. At this time, the friction pulley pulley pulls passively under the drive of the curtain slats, without generating additional resistance to the winding of the curtain slats, ensuring a smooth winding process. By incorporating friction pull wheels, the control over the movement of the curtain slats is further enhanced. Especially when the curtain slats are long or descend at a fast speed, the system effectively prevents the curtain slats from swaying left and right or separating from the limit baffle due to inertia. This ensures that the curtain slats always move stably along the guide of the limit baffle and the track, reducing impact and noise during the movement process and improving the overall smoothness and reliability of the electric roller shutter door.

[0019] 4. In this invention, when the curtain slats are released and lowered to the closed state, the lowest curtain slats drive the pressing block to move down synchronously. During the downward movement of the pressing block, it contacts the upper end of the first rack and pushes the first rack to slide down along the groove of the second support plate. When the first rack moves down, it drives the gear meshing with it to rotate. The gear then drives the second rack meshing on the other side to move upward. The upward movement of the second rack pushes the lowest push-pull plate to move upward. The lowest push-pull plate drives the elastic arc plate to arch upward and deform through one end of the inserted elastic arc plate. Since the upper end of the elastic arc plate is alternately connected with multiple sets of push-pull plates and elastic arc plates, and the uppermost push-pull plate is fixed to the track by a pin, under the continuous push of the second rack, multiple sets of elastic arc plates arch upward in sequence, finally forming an arc-shaped structure arching towards the curtain slats, which is tightly attached to the hinge point side of the curtain slats. At this point, the elastic curved plates exert continuous compressive force on the curtain slats through their own elastic deformation, thus providing uniform support and enhancing the overall strength of the curtain slats when closed, while also improving their wind resistance. When the curtain slats roll up, the lowest slat causes the compression block to move upwards, separating from the first rack. The second rack, under the tension of the second spring, returns to its original position along the groove. The gear rotates in the opposite direction, causing the first rack to move upwards and return to its original position. Simultaneously, the downward movement of the second rack causes the lowest push-pull plate to lose its upward thrust. Each elastic curved plate gradually flattens under its own elastic restoring force, releasing the compression on the curtain slats and preventing any obstruction to the curtain's rolling. The limiting plate ensures that the push-pull plates can only slide vertically along the inner wall of the track, preventing lateral displacement during movement and ensuring precise and controllable arching and flattening of the elastic curved plates. This solution achieves automatic compression and sealing of the curtain slats when closed, improving the structural strength and wind resistance of the electric roller shutter door. At the same time, the compression is automatically released when the curtain slats are rolled up, without affecting the normal operation of the roller shutter door. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the electric roller shutter door of the present invention from a first-view perspective;

[0022] Figure 2 This is a schematic diagram of the overall structure of the electric roller shutter door of the present invention from a second perspective;

[0023] Figure 3 This is a schematic diagram of the internal structure of the pressure feedback component in this invention;

[0024] Figure 4 This is a two-dimensional schematic diagram of the curtain slats after they have been confined in this invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of the curtain slats after they have been confined in this invention;

[0026] Figure 6 This is a schematic diagram of the connection between the gear and the second rack in this invention;

[0027] Figure 7 This is a three-dimensional connection diagram of the push-pull plate and the elastic arc plate in this invention;

[0028] Figure 8 This is a two-dimensional connection diagram of the push-pull plate and the elastic arc plate in this invention;

[0029] Figure 9 This is a schematic diagram of the structure of the curtain slats in this invention;

[0030] Figure 10 This is a schematic diagram of the connection between the ratchet and the pulley in this invention;

[0031] Figure 11 This is a schematic diagram of the friction pull wheel in this invention;

[0032] In the diagram: 1. Curtain slats, 11. Limiting platform, 12. Limiting baffle, 13. Limiting guide wheel, 14. Friction pull wheel, 141. Elastic support frame, 142. Support sleeve, 143. Ratchet, 15. Pull pulley, 16. First belt, 17. First pulley, 18. Support wheel, 19. Track, 2. Extrusion block, 21. First rack, 22. Second support plate, 23. Gear, 24. Second rack, 25. Push-pull plate, 26. Elastic arc plate, 27. Limiting plate, 28. Second spring, 29. Pressure feedback component, 3. Swing plate, 31. First spring, 32. Support column, 33. Pressure sensor, 34. Winding wheel, 4. Winding belt transmission assembly, 5. Drive motor, 6. Moving slide assembly, 7. Compensating motor, 8. Mounting bracket, 9. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] like Figures 1 to 3As shown, an electric roller shutter door includes a curtain slat 1, a track 2, a pressure feedback component 3, a winding wheel 4, a winding belt drive assembly 5, a drive motor 6, a moving slide assembly 7, a compensating motor 8, and a mounting bracket 9. The curtain slats 1 are hinged sequentially. One end of the hinged curtain slat 1 slides within the track 2, which is symmetrically arranged on both sides, while the other end is wound around the winding wheel 4, which is symmetrically arranged on both sides. The curtain slat 1 wound around the winding wheel 4 enters the track 2 along the tangent direction of the winding wheel 4. The pressure feedback component 3 is located on one side of the tangent point. The pressure feedback component 3 is used to detect the pressure feedback of the curtain slat 1 against the track 2. The extrusion pressure; the take-up roller 4 is fixedly connected to the mounting plate of the movable slide assembly 7 via an L-shaped bracket; the shaft of the take-up roller 4 is connected to the shaft of the drive motor 6 via the take-up belt transmission assembly 5; the drive motor 6 is fixedly connected to the mounting plate of the movable slide assembly 7; the movable slide assembly 7 is mounted on the mounting bracket 9; the movable slide assembly 7 is connected to the shaft of the compensation motor 8 via a lead screw and nut pair; the compensation motor 8 is fixedly connected to the mounting bracket 9; one end of the mounting bracket 9 is fixedly connected to the track 2.

[0035] During operation, the drive motor 6 drives the take-up wheel 4 to rotate through the take-up belt transmission assembly 5, thereby achieving the winding or unwinding of the curtain slats 1 and controlling the opening and closing of the roller shutter door. During the winding or unwinding process of the curtain slats 1, the pressure feedback component 3 detects the squeezing force exerted on the curtain slats 1 in real time. Since the number of turns of the curtain slats 1 around the take-up wheel 4 is different, the diameter after winding also changes continuously, and thus the squeezing force exerted on the pressure feedback component 3 by the curtain slats 1 also changes. At this time, the pressure feedback component 3 transmits the detected pressure signal to the controller, and the controller determines whether position compensation is needed based on the preset pressure threshold. When the detected pressure value exceeds the normal range, the controller drives the compensation motor 8 to work. The compensation motor 8 drives the moving slide assembly 7 to move on the mounting bracket 9 through the lead screw and nut pair, which in turn drives the take-up roller 4 and the drive motor 6 to move as a whole, adjusting the relative position between the take-up roller 4 and the track 2. This ensures that the tangential direction of the curtain slat 1 winding on the take-up roller 4 always coincides with the track 2, thereby reducing the abnormal squeezing force between the curtain slat 1 and the track 2, ensuring that the curtain slat 1 can slide smoothly in the track 2, and improving the stability and reliability of the electric roller shutter door operation. Moreover, keeping the curtain slat 1 vertically entering the track 2 along the tangential direction on the take-up roller 4 also reduces the friction between the curtain slat 1 and the inner wall of the track 2, thereby reducing noise generation. One end of the mounting bracket 9 is fixedly connected to the track 2, providing a stable mounting foundation for the entire moving slide assembly 7, take-up roller 4, drive motor 6, and compensation motor 8, ensuring the structural stability of each component during operation.

[0036] like Figure 4 , Figure 5 and Figure 9As shown, the hinge point between the curtain slats 1 is offset towards one side of the winding wheel 4, and a limiting platform 11 that abuts against each other is provided on the other side; the limiting platform 11 restricts the maximum swing between adjacent curtain slats 1 to be level; the non-hinge point side of the curtain slat 1 is attached to a limiting baffle 12 that is vertical and aligned with the track 2; the lower end of the limiting baffle 12 is fixedly connected to the track 2; a limiting guide wheel 13 that is pressed and attached to the curtain slat 1 is provided on the hinge point side of the curtain slat 1; the limiting guide wheel 13 is rotatably connected to the track 2 through a first support plate.

[0037] During operation, when the curtain slat 1 is in the winding state, since the hinge point is biased towards the winding wheel 4, the adjacent curtain slats 1 can naturally fold towards the winding wheel 4 during the winding process, reducing the radial space occupied during winding and making the curtain slats 1 more tightly arranged on the winding wheel 4. When the curtain slat 1 is released and in the vertical closed state, the limiting platform 11 on the other side abuts against each other, limiting the maximum swing angle between adjacent curtain slats 1 until they are flush, ensuring that the curtain slats 1 form a flat door panel structure, effectively blocking external environmental factors, and avoiding structural instability or abnormal friction between the curtain slats 1 and the track 2 due to excessive swing.

[0038] By setting a limiting guide wheel 13 on one side of the hinge point of the curtain slat 1, when the curtain slat 1 is rolled up or released, the limiting guide wheel 13 is pressed and adhered to the curtain slat 1, which plays a guiding and limiting role on the hinge point side of the curtain slat 1, thereby pressing and adhering the curtain slat 1 to the limiting baffle 12 on the opposite side; and because the hinge point between the curtain slats 1 is biased towards the side of the winding wheel 4, when the curtain slat 1 is released from the winding wheel 4 and moves downward along the track 2, the limiting platform 11 on the other side abuts against each other, limiting the maximum swing angle between adjacent curtain slats 1, keeping them in a flat state, and preventing the curtain slat 1 from shifting left or right or twisting during the descent, thereby ensuring that the curtain slat 1 can be neatly adhered to the limiting baffle 12. The limiting baffle 12 is set vertically and aligned with the track 2, thus providing stable guiding support for the curtain slat 1. This further ensures the straightness of the curtain slat 1 before entering the track 2, thereby preventing the curtain slat 1 from colliding and rubbing against the track 2 or other components due to the offset of the hinge point during movement. This reduces the wear of the curtain slat 1, extends its service life, and also helps to maintain the smoothness of the movement of the curtain slat 1 and reduce operating noise.

[0039] For example, 3 to Figure 5As shown, the pressure feedback component 3 includes a swing plate 31, a first spring 32, a support column 33, and a pressure sensor 34; a first groove is provided at the tangent point on the limiting baffle 12 where it is tangent to the curtain slat 1; a second groove is provided at the lower end of the first groove; an inclined surface is provided between the middle of the first groove and the second groove; the swing plate 31 is provided inside the first groove; one side of the swing plate 31 is flush with the limiting baffle 12 when not under external force; a spherical groove is provided in the middle of the other side of the swing plate 31; the hemispherical surface of one end of the support column 33 abuts against the spherical groove on the swing plate 31; the other end of the support column 33 is fixedly connected to the pressure sensor 34; the pressure sensor 34 is fixedly connected to the limiting baffle 12; one end of the first spring 32 is connected to the lower end of the swing plate 31; the other end of the first spring 32 is connected to the second groove.

[0040] During operation, when the curtain slat 1 is released from the take-up reel 4 and moves downward along the track 2, the side of the curtain slat 1 contacts and presses against one side of the swing plate 31. Since the curtain slat 1 has a certain width, the contact angle between the curtain slat 1 and the swing plate 31 is not truly tangent, but rather exists at a certain angle. This pressing angle causes the swing plate 31 to rotate around the hemisphere of one end of the support column 33 within a spherical groove. As the swing plate 31 rotates, it compresses the first spring 32 on its lower side and simultaneously applies pressure to the hemisphere of the support column 33 through the spherical groove. The support column 33 then transmits this pressure to the pressure sensor 34, which detects the pressing force exerted by the curtain slat 1. When the number of turns of the curtain slat 1 on the take-up reel 4 changes, causing a change in the winding diameter, the pressing force exerted by the curtain slat 1 on the swing plate 31 also changes accordingly. The pressure sensor 34 transmits the real-time detected pressure signal to the controller, providing a basis for subsequent position compensation. When the angle of contact between each slat 1 and the swing plate 31 changes, the swing of the swing plate 31 makes it easier for the slat 1 to transition to contact with the limiting baffle 12, thereby reducing rigid collisions between the slat 1 and the swing plate 31 and improving the stability and quietness of the roller shutter operation. The inclined surface set between the middle of the first recess and the second recess provides room for the rotation of the swing plate 31, avoiding interference between the swing plate 31 and the limiting baffle 12 during rotation; and when there is no external force, one side of the swing plate 31 is flush with the limiting baffle 12, ensuring that the slat 1 can smoothly contact the swing plate 31 during normal movement, without obstructing the movement of the slat 1 or generating additional friction due to the protrusion or depression of the swing plate 31.

[0041] like Figures 3 to 5 and Figure 10As shown, a friction pull wheel 14 is provided below the limiting guide wheel 13; the friction pull wheel 14 is pressed and adhered to the side of the curtain slat 1; the friction pull wheel 14 is rotatably connected to the first support plate; a ratchet 15 is fixedly connected to the rotating shaft of the friction pull wheel 14; a pull puller 16 is connected to the ratchet 15; the pull puller 16 is connected to the first pulley 18 for transmission through the first belt 17; the first pulley 18 is fixedly connected to the rotating shaft connected to the drive motor 6.

[0042] During operation, the drive motor 6 drives the take-up wheel 4 to rotate, thereby winding or releasing the curtain slat 1. Simultaneously, its shaft drives the first pulley 18 to rotate synchronously. The first pulley 18 drives the pull belt 16 to rotate via the first belt 17. The pull belt 16 is connected to the ratchet 15, which in turn drives the ratchet 15 and the friction pull wheel 14 to rotate. Because the friction pull wheel 14 is pressed and adhered to the side of the curtain slat 1, when the curtain slat 1 is released and descends, the friction pull wheel 14 generates a downward frictional force on the hinge point side of the curtain slat 1 during rotation, forming a pulling effect. At the same time, combined with the guide wheel 13 guiding and limiting the hinge point side of the curtain slat 1, the non-hinge point side of the curtain slat 1 can be more tightly adhered to the limit baffle 12 during descent, avoiding local warping or displacement caused by uneven weight distribution of the curtain slat 1 or changes in descent speed. When the curtain slat 1 rolls up, the ratchet 15 structure prevents the pull puller 16 from driving the friction pull wheel 14 to rotate in the opposite direction. At this time, the friction pull wheel 14 only rotates passively under the drive of the curtain slat 1, without generating additional resistance to the rolling of the curtain slat 1, ensuring a smooth rolling process. The setting of the friction pull wheel 14 further enhances the control of the movement posture of the curtain slat 1. Especially when the curtain slat 1 is long or the descent speed is fast, it can effectively prevent the curtain slat 1 from swaying left and right under inertia or separating from the limit baffle 12, thereby ensuring that the curtain slat 1 always moves stably along the guide of the limit baffle 12 and the track 2, reducing the impact and noise during the movement process, and improving the overall stability and reliability of the electric roller shutter door.

[0043] like Figure 11 As shown, the friction pull wheel 14 includes a friction wheel 141, an elastic support frame 142, and a support sleeve 143; the friction wheel 141 is made of wear-resistant rubber; the inner wall of the friction wheel 141 is provided with a first arc groove evenly spaced along the circumferential direction; the support sleeve 143 is provided inside the friction wheel 141; the outer surface of the support sleeve 143 is provided with a second arc groove evenly spaced along the circumferential direction; the elastic support frame 142 is provided between the support sleeve 143 and the friction wheel 141; the cross-section of the elastic support frame 142 is an annular wave tooth structure, the peak of the wave tooth abuts in the first arc groove, and the peak and valley of the wave tooth abut in the second arc groove.

[0044] The elastic support frame 142 is made of elastic metal material, possessing excellent deformation capacity and recovery performance. The support sleeve 143 is fixedly sleeved on the rotating shaft of the friction pull wheel 14. During operation, when the friction pull wheel 14 is pressed against the side of the curtain slat 1, the friction wheel 141 is radially compressed by the reaction force of the curtain slat 1. At this time, the first arc groove on the inner wall of the friction wheel 141 presses against the wavy tooth peak of the elastic support frame 142, causing the elastic support frame 142 to undergo elastic deformation. The wavy tooth structure absorbs pressure through its own contraction and bending. At the same time, the second arc groove on the outer surface of the support sleeve 143 supports the wavy tooth peaks and valleys of the elastic support frame 142, ensuring that the deformation of the elastic support frame 142 is uniform and stable. This structural design allows the friction wheel 141 to adaptively adjust its contact area and pressure with the curtain 1 according to the actual contour and pressure magnitude of the curtain 1's side surface. Even if there are slight unevennesses on the side of the curtain 1 or a small radial displacement occurs during movement, the friction wheel 141 can maintain reliable contact with the curtain 1 through the elastic deformation of the elastic support frame 142, thereby ensuring stable output of frictional force and ensuring continuous and effective pulling force on the curtain 1. The wear-resistant rubber material of the friction wheel 141 not only provides a large coefficient of friction, ensuring efficient transmission of pulling force, but also has good wear resistance and cushioning performance, which can reduce rigid friction with the curtain 1 and avoid wear on the surface of the curtain 1. The elastic support frame 142, made of elastic metal material, ensures that the entire friction pull wheel 14 maintains good elasticity during long-term use and is not prone to permanent deformation, thereby extending the service life of the friction pull wheel 14 and further improving the stability and reliability of the electric roller shutter door operation.

[0045] like Figures 7 to 8 As shown, the lowermost curtain slat 1 is rotatably connected to the support wheel 19 via a hinge seat on the side near the hinge point; the support wheel 19 remains in contact with the inner wall of the track 2.

[0046] During operation, the limiting platforms 11 on the other side of the curtain slats 1 abut against each other, limiting the maximum swing angle between adjacent curtain slats 1 until they are level. The support wheel 19, located on one side of the hinge point, ensures that the limiting platforms 11 on the other side of the curtain slats 1 remain in contact, preventing the limiting platforms 11 from separating due to lateral forces or uneven weight distribution during the sliding of the curtain slats 1 within the track 2. This ensures that the curtain slats 1 maintain a flat door panel structure, preventing friction between the curtain slats 1 and the inner wall of the track 2 during movement, thus improving the stability and quietness of the roller shutter door operation. When the curtain slats 1 move up and down within the track 2, the support wheel 19 rolls along the inner wall of the track 2, converting the sliding friction between the curtain slats 1 and the track 2 into rolling friction, effectively reducing movement resistance and making the raising and lowering of the curtain slats 1 smoother. It also reduces wear between the curtain slats 1 and the inner wall of the track 2. The support wheel 19 is rotatably connected to the hinge point of the lowest curtain slat 1 via a hinge seat. This allows the support wheel 19 to adapt to any minor unevenness that may exist on the inner wall of the track 2, maintaining good contact with the inner wall of the track 2 at all times. This prevents the curtain slat 1 from swaying or shifting during movement due to poor contact. In addition, the support wheel 19 also provides some support to the lowest curtain slat 1, further ensuring the sealing and structural stability of the roller shutter door when closed. It also helps maintain the accuracy of the movement trajectory of the curtain slat 1 during the rolling and unrolling process, improving the overall operating performance of the electric roller shutter door.

[0047] like Figures 5 to 9 As shown, a pressing block 21 is fixedly connected to one side of the lowest curtain slat 1; a first rack 22 is vertically arranged below the pressing block 21; the first rack 22 is slidably connected in a groove on the side of the second support plate 23; the first rack 22 meshes with one side of the gear 24 for transmission, and the other side of the gear 24 meshes with a second rack 25 arranged vertically for transmission; the upper end of the second rack 25 is fixedly connected to the lower end of the lowest push-pull plate 26, and the upper end of the lowest push-pull plate 26 is fixedly connected to one end of an elastic arc plate 27; Multiple sets of push-pull plates 26 and elastic arc plates 27 are alternately connected to the upper end of the elastic arc plate 27; the uppermost push-pull plate 26 is fixedly connected to the track 2 by a pin; the arching direction of the elastic arc plate 27 faces the curtain slat 1; the push-pull plate 26 is restricted from sliding along the inner wall of the track 2 by a limiting plate 28 fixedly connected to the inner wall of the track 2; the lower end of the second rack 25 is connected to the lower end of the second spring 29 through a third support plate; the upper end of the second spring 29 abuts against the end of the track 2.

[0048] During operation, when the curtain slat 1 is released and lowered to the closed state, the lowest curtain slat 1 drives the pressing block 21 to move downwards synchronously. During the downward movement, the pressing block 21 contacts the upper end of the first rack 22 and pushes the first rack 22 to slide downwards along the groove of the second support plate 23. When the first rack 22 moves downwards, it drives the gear 24 meshing with it to rotate. The gear 24 then drives the second rack 25 meshing on the other side to move upwards. The upward movement of the second rack 25 pushes the lowest push-pull plate 26 upwards. The lower push-pull plate 26, through one end of the inserted elastic arc plate 27, causes the elastic arc plate 27 to arch upwards and deform. Since multiple sets of push-pull plates 26 and elastic arc plates 27 are alternately connected at the upper end of the elastic arc plate 27, and the uppermost push-pull plate 26 is fixed to the track 2 by a pin, under the continuous pushing of the second rack 25, the multiple sets of elastic arc plates 27 arch upwards in sequence, ultimately forming an arc-shaped structure arching towards the curtain slat 1, tightly fitting against the hinge point side of the curtain slat 1. At this time, the elastic arc plate 27 generates continuous compressive force on the curtain slat 1 through its own elastic deformation, thereby providing uniform support for the curtain slat 1, enhancing the overall strength of the curtain slat 1 in the closed state, and simultaneously enhancing the wind resistance of the curtain slat 1. When the curtain slat 1 rolls up, the lowest curtain slat 1 moves the pressing block 21 upward, separating the pressing block 21 from the first rack 22. The second rack 25, under the tension of the second spring 29, returns to its original position along the groove. The gear 24 rotates in the opposite direction, causing the first rack 22 to move upward and return to its original position. Simultaneously, the second rack 25 moves downward, causing the lowest push-pull plate 26 to lose its upward thrust. Each elastic arc plate 27 gradually flattens under its own elastic restoring force, releasing the pressure on the curtain slat 1 and preventing obstruction to its rolling. The limiting plate 28 ensures that the push-pull plate 26 can only slide vertically along the inner wall of the track 2, preventing lateral displacement during movement and ensuring precise and controllable arching and flattening of the elastic arc plates 27. This solution, through this structural design, achieves automatic pressing and sealing of the curtain slat 1 in the closed state, improving the structural strength and wind resistance of the electric roller shutter door. Simultaneously, it automatically releases the pressure when the curtain slat 1 rolls up, without affecting the normal operation of the roller shutter door.

[0049] like Figure 9 As shown, the push-pull plate 26 and the elastic arc plate 27 are connected and fixed by a lateral insertion method.

[0050] The push-pull plate 26 has a slot on the side near the elastic arc plate 27. Both ends of the elastic arc plate 27 have inserts that fit into the slot. These inserts are inserted into the slots to achieve a detachable connection between the push-pull plate 26 and the elastic arc plate 27. This lateral insertion method facilitates quick disassembly and replacement of the push-pull plate 26 and the elastic arc plate 27 during installation and maintenance. If a single elastic arc plate 27 or push-pull plate 26 is damaged, it is not necessary to replace the entire plate; simply pull the insert of the damaged part out of the slot for individual replacement, reducing maintenance costs and operational difficulty. Simultaneously, the lateral insertion structure allows for the transmission of tensile and pushing forces through the cooperation between the inserts and slots when the elastic arc plate 27 is arched or flattened, ensuring effective force transmission and enabling multiple sets of elastic arc plates 27 and push-pull plates 26 to work together to form a stable arc-shaped support structure.

[0051] The lateral insertion method between the push-pull plate 26 and the elastic arc plate 27 is either a dovetail groove connection or an anti-slip texture provided on the inner wall of the slot. The slot is either a dovetail groove or has an anti-slip texture on its inner wall, and the outer surface of the insertion block has a raised ridge that mates with the anti-slip texture. The dovetail groove connection or the combination of the anti-slip texture and the raised ridge further improves the reliability of the connection, preventing loosening of the insertion part due to vibration or other factors during long-term use. This ensures the stability and durability of the support provided by the elastic arc plate 27 to the curtain slat 1 when the electric roller shutter door is closed.

[0052] The wall thickness of the elastic arc plate 27 gradually increases along both ends.

[0053] The two ends of the elastic arc-shaped plate 27 are connected to the push-pull plate 26. When arching and deforming, the two ends are subjected to greater forces. Increasing the wall thickness at both ends can improve its structural strength and prevent breakage due to stress concentration at the ends. The thinner wall thickness in the middle retains better elastic deformation capacity, ensuring that the elastic arc-shaped plate 27 can arch smoothly and generate uniform compressive force on the curtain slat 1. This gradual wall thickness design allows the elastic arc-shaped plate 27 to meet the elastic support requirements while taking into account the structural durability and extending the service life of the components. The gradually and uniformly increasing wall thickness also makes the deformation controllable, resulting in better symmetry at both ends of the arched elastic arc-shaped plate 27. This avoids the overall twisting of the elastic arc-shaped plate 27 due to inconsistent deformation at both ends during the arching process, thereby ensuring a uniform distribution of support force on the curtain slat 1 and preventing excessive or insufficient local pressure. This further enhances the structural stability and wind resistance of the electric roller shutter door when it is closed.

[0054] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A motorized roller door, characterized in that: The utility model provides a curtain winding device, including curtain piece (1), track (2), pressure feedback part (3), winding wheel (4), winding belt transmission assembly (5), drive motor (6), mobile slide platform assembly (7), compensation motor (8) and mounting support (9), curtain piece (1) is hinged in proper order, the curtain piece (1) after hinged one end slides in the track (2) that is set up symmetrically on both sides, and the other end is wound on the winding wheel (4) that is set up symmetrically on both sides, the curtain piece (1) is wound on the tangent direction of winding wheel (4) and enters the track (2), and the tangent point of tangent is set up pressure feedback part (3) on one side, pressure feedback part (3) is used for detecting the extrusion of curtain piece (1) to it, winding wheel (4) is fixedly connected on the mounting plate of mobile slide platform assembly (7) through L type support, the pivot of winding wheel (4) is connected with the pivot of drive motor (6) through winding belt transmission assembly (5), drive motor (6) is fixedly connected on the mounting plate of mobile slide platform assembly (7), mobile slide platform assembly (7) is installed on mounting support (9), mobile slide platform assembly (7) is connected with the pivot of compensation motor (8) through screw nut pair, compensation motor (8) is fixedly connected on mounting support (9), one end of mounting support (9) is fixedly connected on track (2), The hinge point between the curtain piece (1) is arranged on one side of the winding wheel (4), and a limiting block (11) is arranged on the other side to abut against each other. The limiting block (11) limits the maximum swing between adjacent curtain pieces (1) to be flush. The non-hinge point side of the curtain piece (1) is attached to a limiting baffle (12) aligned with the track (2) in the vertical direction. The lower end of the limiting baffle (12) is fixedly connected to the track (2). The hinge point side of the curtain piece (1) is provided with a limiting guide wheel (13) abutting against the curtain piece (1). The limiting guide wheel (13) is rotatably connected to the track (2) through a first support plate. The pressure feedback part (3) includes a swing plate (31), a first spring (32), a support column (33), and a pressure sensor (34). A first recess is provided at the tangent point position of the limiting baffle (12) and the curtain piece (1). A second recess is provided at the lower end of the first recess. An inclined surface is provided between the middle part of the first recess and the second recess. The swing plate (31) is arranged in the first recess. One side of the swing plate (31) is flush with the limiting baffle (12) in the absence of external force. A spherical recess is provided in the middle part of the other side of the swing plate (31). The hemispherical surface of one end of the support column (33) abuts against the spherical recess on the swing plate (31). The other end of the support column (33) is fixedly connected to the pressure sensor (34). The pressure sensor (34) is fixedly connected to the limiting baffle (12). One side of the lower end of the swing plate (31) is connected to one end of the first spring (32). The other end of the first spring (32) is connected in the second recess.

2. A motorized roller door according to claim 1, characterised in that: The lower part of the limiting guide wheel (13) is provided with a friction pull wheel (14); the friction pull wheel (14) is extruded and attached to the side of the curtain piece (1); the friction pull wheel (14) is rotationally connected to the first supporting plate; the rotation shaft of the friction pull wheel (14) is fixedly connected with a ratchet wheel (15); the ratchet wheel (15) is connected with a pull belt wheel (16); the pull belt wheel (16) is connected with a first belt wheel (18) through a first belt (17) for transmission; the first belt wheel (18) is fixedly connected to the rotation shaft connected with the driving motor (6).

3. A motorized roller door according to claim 2, wherein: The friction pull wheel (14) comprises a friction wheel (141), an elastic supporting frame (142) and a supporting sleeve (143); the friction wheel (141) is made of wear-resistant rubber material; the inner wall of the friction wheel (141) is uniformly and interval provided with first circular arc grooves in the circumferential direction; the supporting sleeve (143) is arranged in the friction wheel (141); the outer surface of the supporting sleeve (143) is uniformly and interval provided with second circular arc grooves in the circumferential direction; the elastic supporting frame (142) is arranged between the supporting sleeve (143) and the friction wheel (141); the cross section of the elastic supporting frame (142) is in the shape of wavy tooth structure, the peak of the wavy tooth structure is in contact with the first circular arc grooves, and the valley of the wavy tooth structure is in contact with the second circular arc grooves.

4. The motorized roller door according to claim 1, wherein: The lowermost curtain piece (1) is rotationally connected with a supporting wheel (19) through a hinge seat on the side close to the hinge point; the supporting wheel (19) keeps contact with the inner wall of the track (2).

5. A motorized roller door according to claim 4, wherein: The lowermost curtain piece (1) is fixedly connected with an extrusion block (21) on one side; a first rack (22) is vertically arranged below the extrusion block (21); the first rack (22) is slidingly connected in the sliding groove on the side edge of a second supporting plate (23); the first rack (22) is in mesh transmission with one side of a gear wheel (24), and the other side of the gear wheel (24) is in mesh transmission with a second rack (25) vertically arranged; the upper end of the second rack (25) is fixedly connected with the lower end of the lowermost push-pull plate (26), and the upper end of the lowermost push-pull plate (26) is fixedly connected with one end of an elastic arc-shaped plate (27); the upper end of the elastic arc-shaped plate (27) is alternately connected with a plurality of push-pull plates (26) and elastic arc-shaped plates (27); the uppermost push-pull plate (26) is fixedly connected with the track (2) through a pin; the arching direction of the elastic arc-shaped plate (27) is towards the curtain piece (1); the push-pull plate (26) is limited to slide along the inner wall of the track (2) through a limiting plate (28) fixedly connected to the inner wall of the track (2); the lower end of the second rack (25) is connected with the lower end of a second spring (29) through a third supporting plate; the upper end of the second spring (29) is in contact with the end of the track (2).

6. A motorized roller door according to claim 5, wherein: The push-pull plate (26) and the elastic arc-shaped plate (27) are connected and fixed through lateral insertion.

7. A motorized roller door according to claim 6, wherein: The lateral insertion of the push-pull plate (26) and the elastic arc-shaped plate (27) is dovetail groove connection or realized through the anti-skid lines on the inner wall of the insertion groove.

8. A motorized roller door according to claim 5, wherein: The wall thickness of the elastic arc-shaped plate (27) gradually increases in the direction of both ends.

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