Electrically powered pinch-type closure door

Abstract

This application provides an electric pressing airtight door, which uses a servo motor to drive a trapezoidal lead screw, causing an inclined wedge to engage with an inclined pad on the door panel. This replaces the manual operation that requires high load by having the servo motor push the inclined wedge to press the inclined pad. The operator only needs to push and pull the door, which improves the ease of operation.

Description

Technical Field

[0001] This utility model relates to the field of locking structure technology, specifically to an electrically operated pressure-type airtight door. Background Technology

[0002] Existing mechanically clamped airtight doors offer advantages such as good stability and high airtightness. For example, a double-airbag inflatable airtight door disclosed in publication number CN218234913U has a door panel connected to the door frame via hinges and uses a latch-type locking structure where the latch is inserted into a keyhole in the door body. With this type of door, closing requires manual force from personnel to ensure the latch can be inserted into the keyhole, which is laborious. Furthermore, over long-term use, friction between the latch and the keyhole can easily create gaps, potentially causing the sealing performance to deteriorate rapidly with wear. Additionally, the latch assembly is highly integrated with the door body, requiring disassembly of the door panel and frame for repairs to the keyhole or latch, resulting in low maintenance efficiency. Summary of the Invention

[0003] To address the issue that existing lock tongue and lock hole insertion structures require tedious manual tightening when closing, this invention provides an electrically operated, press-fitting airtight door. This door eliminates the need for manual tightening when closing, and damaged components can be individually disassembled and replaced without disassembling the door itself, thus improving maintenance efficiency.

[0004] The structure of this utility model is as follows: an electrically operated pressure-locking airtight door, comprising: a door frame, a door panel, and an electrically locking mechanism, wherein the door panel is hinged to the door frame via hinges; characterized in that: The electric locking mechanism includes: a base plate, a guide rail, a top plate, a servo motor, an inclined pad, an inclined wedge, and a trapezoidal lead screw; The base plate is located on the door opening side and is installed on the door frame and the fixed door frame structure; the servo motor is fixed on the end of the base plate away from the door panel; the fixed support is installed on the base plate near the servo motor end, and the top plate is installed on the base plate near the door panel end; the trapezoidal lead screw is horizontally arranged and rotatably installed on the base plate through the top plate and the fixed support; the output end of the servo motor is connected to the trapezoidal lead screw. The guide rail is arranged parallel to the trapezoidal lead screw and is fixed on the base plate; The inclined pad is fixed to the panel surface on the opening side of the door panel. The inclined pad is provided with a first locking inclined surface. The angle between the first locking inclined surface and the panel surface of the door panel is α. The end of the angle α is located near the door frame. The inclined wedge is mounted on the connecting structure, one end of the connecting structure is slidably mounted on the guide rail, and the connecting structure is mounted on the trapezoidal lead screw based on thread engagement; The inclined wedge is provided with a second locking inclined surface, which is parallel to the first locking inclined surface. The first locking inclined surface is located between the movement trajectory of the second locking inclined surface and the door panel. As the horizontal position between the two inclined surfaces approaches, the second locking inclined surface presses against the first locking inclined surface.

[0005] Its further features are: The connection structure includes: a nut seat, a guide rail slider, a guide rail pad, and a connecting plate; The guide rail slider is slidably mounted on the guide rail, the guide rail pad is mounted on the guide rail slider, the nut seat is threadedly fitted onto the trapezoidal lead screw, and the connecting plate connects the guide rail pad and the nut seat on the side away from the door panel; the inclined wedge is mounted on the side of the connecting plate adjacent to the inclined pad. The height of the top plate is lower than the plane where the movement trajectory of the second locking inclined plane is located; The angle α between the first locking bevel and the surface of the door panel is set to a range of 15° to 25°. It also includes: a magnetic door switch, which is installed on the top of the door frame; It also includes a door handle, which is located on the opening side of the door panel and is at the same height as the base plate.

[0006] This application provides an electrically operated, pressure-locking airtight door. A servo motor drives a trapezoidal lead screw, which in turn engages a wedge block with a trapezoidal pad on the door panel. This replaces the manual operation requiring high loads with the action of the servo motor pushing the wedge block to press against the trapezoidal pad. Operators only need to push or pull the door, improving ease of operation. The trapezoidal lead screw has a self-locking function; when the wedge block and the trapezoidal pad generate a reaction force, the nut seat is in a self-locking state, preventing the wedge block from moving in the opposite direction and ensuring stable pressure. The electrically locking structure in this application includes a second and a first locking bevel, using continuous pressure from the wedge surface instead of a latch, avoiding sealing gap problems caused by latch wear. In this application, the trapezoidal pad, wedge block, connecting structure, and base plate are all installed on the outside of the door. Damaged individual components can be directly disassembled and replaced without disassembling the entire door, reducing maintenance costs. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall structure of the compression-type airtight door of this application; Figure 2 A three-dimensional structural diagram of the electric locking device; Figure 3 A side view of the structure of the electric locking device; Figure 4This is a schematic diagram showing the positional relationship between the inclined wedge and the inclined pad when the electric locking device is tightening the inclined wedge. Detailed Implementation

[0008] like Figures 1-4 As shown, this application includes an electrically operated pressure-locking airtight door, comprising: a door frame 1, a door panel 2, a magnetic door switch 4, a door handle 5, and an electrically operated locking mechanism 6. The door panel 2 is hinged to the door frame 1, and the door panel 2 opens and closes around the hinge. The magnetic door switch 4 is installed at the top of the door frame 1 to sense the opening and closing status of the door; the door handle 5 is located on the opening side of the door panel 2, at the same height as the base plate. Common airtight doors also include a sealing strip (marked in the figure) to improve the sealing effect of the airtight door.

[0009] The electric locking mechanism 6 includes: an inclined pad 601, an inclined wedge 602, a trapezoidal lead screw 603, a servo motor 605, a fixed support 606, a base plate 607, a top plate 611, a guide rail 612, and a connecting structure. The connecting structure includes: a nut seat 604, a guide rail slider 608, a guide rail pad 609, and a connecting plate 610.

[0010] The base plate 607 is located on the door opening side and is installed on the door frame 1 and the wall structure of the fixed door frame 1. The servo motor 605 is fixed on the end of the base plate 607 away from the door panel 2; the fixed support 606 is installed on the end of the base plate 607 away from the door panel 2, and the top plate 611 is installed on the end of the base plate 607 adjacent to the door panel 2; the trapezoidal lead screw 603 is horizontally arranged and is rotatably installed on the base plate 607 through the top plate 611 and the fixed support 606, and the output end of the servo motor 605 is connected to the trapezoidal lead screw 603.

[0011] The trapezoidal lead screw 603 has a self-locking function. When the inclined wedge 602 and the inclined pad 601 are engaged and generate a reaction force, the nut seat 604 is in a self-locking state to prevent the inclined wedge 602 from moving in the opposite direction and to ensure a stable clamping state.

[0012] The guide rail 612 is arranged in parallel with the trapezoidal lead screw 603 and is fixed on the base plate 607.

[0013] The inclined pad 601 is welded and fixed to the panel surface on the opening side of the door panel 2. The inclined pad 601 is provided with a first locking inclined surface 6011. The angle between the first locking inclined surface 6011 and the panel surface of the door panel 2 is α. The end of the first locking inclined surface 6011 with the included angle α is located near the door frame 1.

[0014] In this application, the angle α between the first locking inclined surface 6011 and the surface of the door panel 2 is set to a range of 15° to 25°.

[0015] An inclined wedge 602 is mounted on a connecting structure, one end of which is slidably mounted on a guide rail 612. Simultaneously, the connecting structure is threadedly mounted on a trapezoidal lead screw 603. The trapezoidal lead screw 603, parallel to the horizontal plane, drives the inclined wedge 602 to move linearly in a direction parallel to the ground.

[0016] A second locking inclined surface 6021 is provided on the inclined wedge block 602. The second locking inclined surface 6021 is arranged parallel to the first locking inclined surface 6011. The first locking inclined surface 6011 is positioned between the moving trajectory of the second locking inclined surface 6021 and the door panel 2. As the horizontal position between the two inclined surfaces approaches, the second locking inclined surface 6021 presses against the first locking inclined surface 6011, thereby pressing the door panel 2. Specifically, as shown... Figure 3 As shown.

[0017] The guide rail slider 608 is slidably mounted on two parallel guide rails 612. A guide rail pad 609 is mounted on the guide rail slider 608. A nut seat 604 is threadedly fitted onto a trapezoidal lead screw 603. A connecting plate 610 connects both the guide rail pad 609 and the nut seat 604 on the side away from the door panel 2. A wedge block 602 is mounted on the connecting plate 610 adjacent to the wedge block 601. In this application, the guide rails 612 bear the weight of the connecting structure and the wedge block 602. The nut seat 604 is threadedly mounted on the trapezoidal lead screw 603, and is also connected to the guide rail pad 609 via the connecting plate 610, allowing it to slide on the guide rail 612. After the servo motor 605 is started, its output drives the trapezoidal lead screw 603 to rotate, and the nut seat 604, along with the inclined wedge block 602, moves linearly between the top plate 611 and the fixed support 606 along the trapezoidal lead screw 603.

[0018] The height of the top plate 611 is lower than the movement trajectory of the second locking ramp 6021, ensuring that it does not obstruct the movement of the second locking ramp 6021.

[0019] Common control modes for servo motors include position mode and torque mode. In practical applications, either position mode or torque mode can be selected. When using the torque feedback control mode of the servo motor, the motor automatically stops when the torque reaches the clamping force required for the wedge block and the wedge pad to achieve a sealed state. This dynamically compensates for the gap caused by the wear of the wedge surface in real time, while the nut seat self-locks to prevent reverse movement, ensuring a constant clamping force. The torque mode servo motor can precisely control the clamping force, compensate for the gap caused by the wear of the wedge surface, avoid overpressure deformation or insufficient sealing, and ensure stable airtightness.

[0020] Specifically, when the servo motor 605 receives the opening and closing command, it starts with a set current and drives the trapezoidal lead screw 603 to rotate. The nut seat 604 drives the inclined wedge block 602 to move along the guide rail 612 toward the door panel 2. When the inclined surface of the inclined wedge block 602 contacts the inclined pad block 601, the door is sealed and locked through the wedge-shaped fit between the inclined wedge block and the inclined pad block. The motor torque increases as the clamping force between the inclined wedge block 602 and the inclined pad block 601 increases. The servo system collects torque feedback in real time. When the torque reaches the set value, the motor driver automatically cuts off the motor power, the trapezoidal lead screw self-locks, and the inclined wedge block remains in a clamped state.

Claims

1. An electrically operated, pressure-operated, airtight door, comprising: The door frame, door panel, and electric locking mechanism are characterized in that the door panel is hinged to the door frame via hinges. The electric locking mechanism includes: a base plate, a guide rail, a top plate, a servo motor, an inclined pad, an inclined wedge, and a trapezoidal lead screw; The base plate is located on the door opening side and is installed on the door frame and the fixed door frame structure; the servo motor is fixed on the end of the base plate away from the door panel; the fixed support is installed on the base plate near the end of the servo motor; the top plate is installed on the base plate near the end of the door panel; the trapezoidal lead screw is horizontally arranged and rotatably installed on the base plate through the top plate and the fixed support; the output end of the servo motor is connected to the trapezoidal lead screw. The guide rail is arranged parallel to the trapezoidal lead screw and is fixed on the base plate; The inclined pad is fixed to the panel surface on the opening side of the door panel. The inclined pad is provided with a first locking inclined surface. The angle between the first locking inclined surface and the panel surface of the door panel is α. The end of the angle α is located near the door frame. The inclined wedge block is installed on the connecting structure, one end of the connecting structure is slidably installed on the guide rail, and the connecting structure is installed on the trapezoidal lead screw based on thread engagement; The inclined wedge is provided with a second locking inclined surface, which is parallel to the first locking inclined surface. The first locking inclined surface is located between the movement trajectory of the second locking inclined surface and the door panel. As the horizontal position between the two inclined surfaces approaches, the second locking inclined surface presses against the first locking inclined surface.

2. The electrically operated pressure-type airtight door according to claim 1, characterized in that: The connection structure includes: a nut seat, a guide rail slider, a guide rail pad, and a connecting plate; The guide rail slider is slidably mounted on the guide rail, the guide rail pad is mounted on the guide rail slider, the nut seat is threadedly fitted onto the trapezoidal lead screw, and the connecting plate connects the guide rail pad and the nut seat on the side away from the door panel; the inclined wedge is mounted on the connecting plate on the side adjacent to the inclined pad.

3. The electrically operated pressure-type airtight door according to claim 1, characterized in that: The height of the top plate is lower than the surface on which the movement trajectory of the second locking ramp is located.

4. The electrically operated pressure-locking airtight door according to claim 1, characterized in that: The angle α between the first locking bevel and the surface of the door panel is set to a range of 15° to 25°.

5. The electrically operated pressure-type airtight door according to claim 1, characterized in that: It also includes a magnetic door switch, which is installed on the top of the door frame.

6. The electrically operated pressure-type airtight door according to claim 1, characterized in that: It also includes a door handle, which is located on the opening side of the door panel and is at the same height as the base plate.

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