Screw drive industrial lift door

Abstract

Screw drive industry lift door, the side of the door curtain is provided with a screw, the screw thread groove on the outer surface of the screw constitutes a guide rail, the edge of the door curtain is provided with a plurality of protrusions along the axial direction of the screw, the plurality of protrusions are respectively embedded in the guide rail and engaged with the guide rail; the screw rotates circumferentially, the door curtain moves along the axial direction of the screw under the pushing of the guide rail, forming a screw drive mechanism; when the driven drum drives the door curtain to be retracted or extended, the screw rotates simultaneously and pushes the edge of the door curtain to rise and fall synchronously through the guide rail. It has the characteristics of effectively preventing falling, smooth transmission, low noise, good reliability, etc.

Description

Technical Field

[0001] This invention relates to the field of industrial overhead door machinery, specifically a screw-driven industrial overhead door. Background Technology

[0002] With the rapid development of the logistics industry, industrial overhead doors are widely used in airports, docks, logistics warehouses, and other locations. Industrial overhead doors typically use motors to drive steel wire ropes or chains to raise and lower the door curtain, while the side edges of the curtain are guided by guide rails and pulleys.

[0003] However, lifting mechanisms using wire ropes or chains are prone to causing the door to fall if the rope or chain breaks. Therefore, additional anti-fall devices are required, resulting in a complex structure and higher manufacturing and maintenance costs for industrial overhead doors. Furthermore, the existing transmission and lifting methods are noisy and prone to track blockage over time, leading to operational difficulties. Summary of the Invention

[0004] To address the existing problems, this invention aims to provide a screw-driven industrial lifting door.

[0005] To achieve the above objectives, the present invention provides a screw transmission mechanism, including a movable component and a screw. The threaded groove on the outer surface of the screw forms an indented guide rail. The movable component has several protrusions along the axial direction of the screw. The several protrusions are respectively embedded in and mesh with the guide rail. The screw rotates circumferentially, and the movable component moves along the axial direction of the screw under the push of the guide rail.

[0006] Preferably, the protrusion is provided on the front end face of the moving member facing the screw.

[0007] Preferably, it also includes a pressure block, which is disposed along the moving stroke and presses against the rear end face of the moving part so that the protrusion is always placed within the guide rail.

[0008] The present invention also provides an industrial lifting door, including a door curtain. The upper end of the door curtain is driven by an active roller to raise and lower. The side of the door curtain is provided with a screw of similar height. The edge of the door curtain is provided with several protrusions. The protrusions and the screw form the aforementioned screw transmission mechanism. When the active roller drives the door curtain to raise and lower, the screw rotates simultaneously and pushes the edge of the door curtain to rise and fall synchronously through the guide rail.

[0009] Preferably, it also includes a driven roller, and the driving roller is driven by a motor to rotate circumferentially on its shaft; the ends of the shafts of the driving roller and the driven roller are respectively provided with pulleys, and the driving roller drives the driven roller to rotate synchronously through a synchronous belt provided between the pulleys for transmission.

[0010] Preferably, the upper end of the curtain is fixedly connected to the driven roller, and when stored, it is wrapped around the outer wall of the driven roller.

[0011] Preferably, the shaft of the drive roller is provided with a first bevel gear perpendicular to its axis, and the upper end of the vertically arranged screw is provided with a second bevel gear perpendicular to its axis. The first bevel gear meshes with the second bevel gear. When the drive roller rotates, the first bevel gear drives the second bevel gear, thereby driving the screw to rotate circumferentially, and then pushing the side of the curtain to move along the axial direction of the screw.

[0012] Preferably, the side of the curtain is also provided with a conveyor belt, and the conveyor belt has several protrusions along the vertical direction.

[0013] Preferably, the conveyor belt is made of rigid PVC material through thermoforming.

[0014] Preferably, the end of the protrusion is spherical.

[0015] Preferably, the screw is located in a side bracket on the side of the curtain, and the side bracket has a long strip-shaped pressure block along the travel direction of the curtain; the front of the side of the curtain faces the screw and has the protrusion; the end of the pressure block abuts against the back of the curtain, so that the protrusion is always placed in the guide rail of the screw.

[0016] Preferably, the door curtain is made of soft PVC material or nitrile rubber PVC foam.

[0017] Compared with existing technologies, this invention overcomes the problem of curtain falling that easily occurs in existing transmission mechanisms by using screw drive to guide the raising and lowering of the curtain side. Screw drive is characterized by low noise, smooth transmission, and high transmission efficiency. The screw has a certain self-cleaning function against dust and other foreign objects, resulting in a low failure rate and high reliability. Therefore, this invention effectively prevents falling, provides smooth transmission, low noise, and high reliability. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a flexible curtain-type industrial overhead door; Figure 2 This is a schematic diagram of the screw drive mechanism in a flexible curtain-type industrial overhead door. Figure 3 This is a partial schematic diagram of the screw drive mechanism in a flexible curtain-type industrial overhead door; Figure 4 This is a schematic diagram of the door curtain structure; Figure 5 A schematic diagram of the meshing structure of the door curtain and the screw; Figure 6 A structural schematic diagram of the door curtain, screw, and guide groove; Figure 7 This is a cross-sectional view of a flexible curtain-type industrial overhead door. Referring to the attached drawings, the components include: belt drive assembly 100, second pulley 100a, first pulley 100b, synchronous belt 100c, screw 101, driven roller 102, driving roller 103, gear drive assembly 104, first bevel gear 104a, second bevel gear 104b, bearing 105, guide groove 108, fixing block 109, side bracket 110, drive motor 200, and door curtain 300. Detailed Implementation

[0019] The invention will now be further described with reference to the accompanying drawings. See also: Figures 1 to 7 , Figures 1 to 7 This illustration shows an embodiment of the present invention: a soft curtain screw-driven industrial lifting door. This embodiment mainly includes screw drive / guide mechanisms on both sides of the door curtain.

[0020] The screw drive / guide mechanism includes a screw arranged in a vertical direction. The side wall of the screw is provided with a threaded groove, which forms an indented guide rail. The helix angle of the threaded groove is a fixed value, and the pitch is equal.

[0021] The curtain, as a moving component, is driven by a roller to move up and down. The curtain is made of soft PVC material, but nitrile rubber PVC foam is also an option. See also Figure 5 The curtain has several protrusions along the axial direction of the screw on its side, corresponding to the threaded grooves and arranged at equal intervals. The ends of the protrusions are embedded in and engaged with the guide rails. The screw rotates circumferentially, and the curtain moves axially along the screw under the push of the guide rails. In the event of a curtain fall, the threaded grooves can withstand the weight of the curtain from the protrusions, preventing the curtain from falling directly and improving safety. During the up-and-down movement of the curtain by the screw, the protrusions can also clean dust and foreign objects from the threaded grooves.

[0022] See Figure 2 The drive roller is horizontally positioned, with the output end of the drive motor connected to one end of its shaft, enabling circumferential rotation. The shaft of the drive roller is rotatably connected to the frame via a set of bearings. A first pulley is located at the other end of the drive roller shaft. The system also includes a horizontally positioned driven roller, with a second pulley corresponding to its shaft on the same side. The shaft of the driven roller is also rotatably connected to the frame via another set of bearings. A synchronous belt connects the first and second pulleys, forming a belt drive assembly. Furthermore, both the first and second pulleys are right-angled bevel gears, and the synchronous belt is preferably a V-belt. The drive roller rotates, driving the driven roller to rotate synchronously via the synchronous belt.

[0023] See Figure 4The curtain has conveyor belts on both sides, with several equidistant protrusions along the edge of the curtain. The conveyor belts are preferably made of rigid PVC thermoplastic, and the ends of the protrusions are preferably spherical. The upper end of the curtain is fixedly connected to the side wall of the driven roller with a pressure strip and fixing screws, and is wrapped around the outer wall of the driven roller when stored.

[0024] See Figure 3 The drive roller has first bevel gears perpendicular to its axis at both ends of its shaft, and two second bevel gears perpendicular to their axes at the upper ends of the two screws. The first and second bevel gears mesh to form a gear transmission assembly. When the drive roller rotates, the first bevel gears drive the second bevel gears, thereby driving the screws to rotate synchronously in the circumferential direction. The threaded grooves on the screws act as guide rails, pushing the protruding parts on the side of the curtain and moving them along the axial direction of the screws.

[0025] See Figure 6 Two screws are respectively installed in the side brackets on both sides of the curtain. The outer wall of the side brackets is fixedly connected to the edge of the door frame by fixing blocks with the same cross-section as angle iron. Preferably, to ensure that the screws can always be tightly engaged with the protrusions of the curtain during transmission, a guide groove is installed on the inner wall of the side bracket. A strip-shaped pressure block is provided in the guide groove along the direction of the curtain's movement. The guide groove and pressure block are preferably an integral structure and are drawn from a high-polymer wear-resistant material. The protrusions are located on the side of the curtain facing the front of the screws. During the up and down movement of the curtain, the end of the pressure block presses against the back of the curtain, so that the screws remain engaged with the protrusions on the curtain during transmission, preventing them from loosening and slipping.

[0026] See Figure 1 and Figure 7 Initially, the curtain is lowered, and the industrial overhead door is closed. Based on the above mechanisms, the screw-driven flexible curtain industrial overhead door operates by first starting the drive motor. The drive motor rotates the driving roller, which in turn drives the driven roller via a belt drive assembly and simultaneously drives the screw via a gear drive assembly. The upper end of the curtain moves with the passive rotation of the driven roller; at the same time, the screw, through a screw drive / guide mechanism, pushes the two edges of the curtain upwards synchronously. Finally, the curtain is wrapped and stored on the side wall of the driven roller, thus opening the industrial overhead door. To close it, simply rotate the drive motor in the opposite direction.

[0027] In this embodiment, the synchronous movement of the driving roller, driven roller, and screw is achieved through a belt drive assembly and a gear drive assembly, thus compressing the structure. However, if each of the three components has an independent motor, the technical objectives and effects of the above embodiment can also be achieved. In particular, the driven roller can forgo the belt drive assembly and be equipped with an independent drive motor with a suitable speed setting to accommodate thicker curtains.

[0028] The embodiments of the present invention have been described above with reference to the accompanying drawings and examples. The structures given in the embodiments do not constitute a limitation of the present invention. Those skilled in the art can make adjustments as needed, and various modifications or variations within the scope of the appended claims are all within the scope of protection.

Claims

1. A screw-driven industrial lifting door, comprising a door curtain, the upper end of which is driven by a drive roller for raising and lowering, characterized in that: The curtain has a screw on its side, and the threaded groove on the outer surface of the screw forms a guide rail. The edge of the curtain has several protrusions along the axial direction of the screw, and these protrusions are embedded in and mesh with the guide rail. The screw rotates circumferentially, and the curtain moves along the axial direction of the screw under the push of the guide rail, forming a screw transmission mechanism. When the active roller drives the curtain to open and close, the screw rotates simultaneously and pushes the edge of the curtain to rise and fall synchronously through the guide rail. It also includes a driven roller, and the driving roller is driven by a motor to rotate circumferentially on its shaft; the ends of the shafts of the driving roller and the driven roller are respectively provided with pulleys, and the driving roller drives the driven roller to rotate synchronously through a synchronous belt located between the pulleys for transmission; The upper end of the curtain is fixedly connected to the driven roller, and when stored, it is wrapped around the outer wall of the driven roller; The drive roller has a first bevel gear on its shaft perpendicular to its axis, and the vertically arranged screw has a second bevel gear perpendicular to its axis. The first bevel gear meshes with the second bevel gear. When the drive roller rotates, the first bevel gear drives the second bevel gear, thereby driving the screw to rotate circumferentially, and then pushing the side of the curtain to move along the screw axis.

2. The screw-driven industrial lifting door according to claim 1, characterized in that: The protrusion is located on the front end face of the curtain facing the screw.

3. The screw-driven industrial lifting door according to claim 1, characterized in that: It also includes a pressure block that presses against the rear end face of the moving part so that the protrusion is always placed within the guide rail.

4. The screw-driven industrial lifting door according to claim 1, characterized in that: The side of the curtain is also equipped with a conveyor belt, which has several protrusions along the vertical direction, and / or the conveyor belt is made of rigid PVC material by thermoplastic, and / or the ends of the protrusions are spherical.

5. The screw-driven industrial lifting door according to claim 1, characterized in that: The screw is located in the side bracket on the side of the curtain. The side bracket has a long strip-shaped pressure block along the travel direction of the curtain. The front of the curtain facing the screw has a protrusion. The end of the pressure block presses against the back of the curtain, so that the protrusion is always placed in the guide rail of the screw.

6. The screw-driven industrial lifting door according to claim 1, characterized in that: The door curtain is made of soft PVC material or nitrile rubber PVC foam.

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