Suspended lifting type shielding door

Abstract

The invention provides a suspension lifting type shielding door which comprises a door side frame, a rail frame, a shielding door body and a displacement lifting mechanism, the displacement lifting mechanism comprises a driving motor, a lead screw, a roller, a sliding block, a screw joint mechanism, a synchronizing mechanism, a chain, a corrugated pipe and a rigidity adjustable mechanism, and under the action of the screw joint mechanism and the synchronizing mechanism, the rigidity adjustable mechanism can be adjusted. The driving motor can drive the roller to rotate or the sliding block to move, the rigidity adjustable mechanism is used for adjusting the rigidity of the corrugated pipe, when the door is opened, the rigidity of the corrugated pipe is increased, the sliding block drives the shielding door body to move outwards through the corrugated pipe, then the rigidity of the corrugated pipe is reduced, the chain is wound when the roller rotates, and therefore the shielding door body is pulled to ascend. The shielding door body can be hung and lifted, when the door needs to be closed, only the process of descending and then displacement needs to be conducted through reverse control, smooth displacement and lifting of the shielding door body can be achieved through the displacement lifting mechanism, the device is suitable for laboratories of different sizes and types, and occupied ground area is reduced.

Description

Technical Field

[0001] This invention relates to the field of shielding door technology, and in particular to a suspended lifting shielding door. Background Technology

[0002] With the accelerated development of intelligent vehicles, electromagnetic compatibility (EMC) testing of components such as millimeter-wave radar and vehicle communication modules has become a core component of automotive testing laboratories. Such tests require a completely enclosed space with high shielding effectiveness. Shielding doors are key equipment for electromagnetic isolation in laboratories. Currently, commonly used shielding doors in automotive testing laboratories are either left-right sliding doors or bottom-track lifting doors. The former requires storage space on both sides of the door that is equivalent to the door width. However, automotive testing laboratories need to ensure the passage of large test vehicles, and the reserved space will significantly compress the limited testing area. The latter relies on the bottom track for load-bearing, and the track gaps are prone to dust accumulation, which contaminates the precision testing environment of the laboratory. Furthermore, track wear will reduce the sealing accuracy of the door, failing to meet the stringent shielding requirements of EMC testing.

[0003] A few laboratories have attempted to use simple suspended shielding doors, but they have significant drawbacks when adapted to automotive testing scenarios. First, the transmission linkage between translation and lifting is poor, and the door is prone to tilting and jamming during frequent opening and closing operations in automotive testing, delaying the passage efficiency of test vehicles. Second, the door needs to be equipped with a thick shielding layer, resulting in a large self-weight. The existing single-brake support structure has insufficient fall protection redundancy, posing a safety hazard. Summary of the Invention

[0004] In view of this, the present invention proposes a suspended lifting shielding door, which can be smoothly and efficiently moved and raised and lowered, and avoids the shielding door from falling due to its own weight.

[0005] The technical solution of this invention is implemented as follows: A suspended lifting shielded door includes a door side frame, a track frame, a shielded door body, and a displacement lifting mechanism. The door side frame is located on the outside of the entrance / exit, the track frame is positioned opposite to the top of the side wall of the door side frame, and the shielded door body is located below the track frame. The displacement lifting mechanism includes a drive motor, a lead screw, a roller, a slider, a screw connection mechanism, a synchronization mechanism, a chain, a corrugated pipe, and a rigid adjustable mechanism. The drive motor is mounted on the track frame, and its output shaft is connected to one end of the lead screw. The roller is mounted on the track frame, and the slider is slidably mounted on the track frame. The roller and the slider have through holes. The screw connection mechanism is located in the through hole of the slider, and the synchronization mechanism is located in the through hole of the roller. The lead screw passes through the through holes of the roller and the slider in sequence. One end of the chain is wound around the roller, and the other end is connected to the top surface of the shielded door body. The corrugated pipe connects the slider and the top surface of the shielded door body. The rigid adjustable mechanism is used to adjust the rigidity of the corrugated pipe.

[0006] Preferably, it also includes a support frame and a limiting mechanism. One side of the support frame is connected to the top of the shielding door and is located below the track frame. The limiting mechanism is used to limit the rise of the shielding door.

[0007] Preferably, the limiting mechanism includes a plurality of limiting posts, the limiting posts are disposed on the bottom surface of the track frame, and the top surface of the side wall of the support frame is provided with a limiting groove, and the support frame rises to make the limiting posts embed into the limiting groove.

[0008] Preferably, it also includes a support mechanism, which includes an electric telescopic rod, a locking seat, and a locking mechanism. The bottom end of the electric telescopic rod is connected to the side wall of the shielding door. The locking seat is located below the end of the support frame away from the shielding door. The output shaft of the electric telescopic rod extends into the locking seat and is locked by the locking mechanism.

[0009] Preferably, the locking mechanism includes a flexible balloon, a magnetorheological fluid, and an electromagnet. The output shaft of the electric telescopic rod is connected to the flexible balloon. The magnetorheological fluid is located in the flexible balloon. An embedding cavity is provided on the outer wall of the locking seat. The inlet diameter of the embedding cavity is smaller than the diameter of the flexible balloon. The electromagnet is located inside the locking seat.

[0010] Preferably, the screw mechanism includes a first electric actuator and an arc-shaped plate. The first electric actuator is disposed on the inner wall of the through hole, and its output shaft is connected to the convex surface of the arc-shaped plate. The concave surface of the arc-shaped plate is provided with threads, and the lead screw passes through the concave surface of the arc-shaped plate.

[0011] Preferably, it also includes side rails and movable blocks. The side rails are arranged opposite each other on both sides of the door side frame, and the shielding door body is located between the side rails. The side walls opposite the side rails and the side walls of the shielding door body are provided with sliding grooves. One side of the movable block is located in the sliding groove of the side rail, and the other side is located in the sliding groove of the shielding door body.

[0012] Preferably, the rigid adjustable mechanism includes a collection box, an electrorheological fluid, a mesh electrode, and a flat electrode. The collection box is disposed on the side wall of the slider, the top end of the bellows extends into the collection box, the electrorheological fluid fills the bellows, the mesh electrode is disposed at the top end inside the bellows, and the flat electrode is disposed at the bottom end inside the bellows.

[0013] Preferably, the displacement lifting mechanism further includes a bearing housing, which is disposed on the top surface of the track frame, and the end of the lead screw away from the drive motor is electrically connected to the bearing housing.

[0014] Preferably, the synchronization mechanism includes a second electric actuator and an abutment plate. The second electric actuator is disposed on the inner wall of the through hole, and its output shaft is connected to the abutment plate. The lead screw passes through the abutment plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The drive motor rotates the lead screw, and the roller rotates synchronously with the lead screw via a synchronization mechanism. The slider is screwed to the lead screw via a screw connection mechanism. When the lead screw rotates, the slider converts the rotational motion of the lead screw into linear motion, and the roller rotates synchronously with the lead screw. The shielding door can be displaced and raised / lowered. During displacement, the rigidity adjustable mechanism increases the stiffness of the bellows, and the slider displacement drives the shielding door to move synchronously through the bellows. During raising / lowering, the rigidity adjustable mechanism reduces the stiffness of the bellows, and the roller rotates with the lead screw, raising the shielding door via a chain. The displacement lifting mechanism allows for rapid displacement and raising / lowering of the shielding door. It has a wide range of applications, is suitable for laboratories of different sizes and types, and can save laboratory floor space. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a suspended lifting shielding door according to the present invention; Figure 2 This is a schematic diagram of the connection structure between the slider and the bellows of a suspended lifting shielding door according to the present invention. Figure 3 This is a schematic diagram of the connection structure between the flexible ball and the locking seat of a suspended lifting shielding door according to the present invention; Figure 4 This is a top view schematic diagram of the connection structure between the shielding door body and the side rail of a suspended lifting shielding door according to the present invention. Figure 5 This is a schematic diagram of the connection structure between the roller and the synchronization mechanism of a suspended lifting shielding door according to the present invention; In the diagram, 1. Door side frame; 2. Track frame; 3. Shielding door body; 4. Drive motor; 5. Lead screw; 6. Roller; 7. Slider; 8. Chain; 9. Corrugated pipe; 10. Through hole; 11. Bearing frame; 12. Limiting post; 13. Limiting groove; 14. Electric telescopic rod; 15. Locking seat; 16. Flexible balloon; 17. Magnetorheological fluid; 18. Electromagnet; 19. Embedded cavity; 20. First electric actuator; 21. Arc plate; 22. Side rail; 23. Movable block; 24. Slide groove; 25. Collection box; 26. Electrorheological fluid; 27. Mesh electrode; 28. Flat electrode; 29. ​​Bearing seat; 30. Second electric actuator; 31. Abutment plate. Detailed Implementation

[0018] To better understand the technical content of this invention, a specific embodiment is provided below, and the invention will be further described in conjunction with the accompanying drawings.

[0019] See Figures 1 to 5 This invention provides a suspended lifting screen door, comprising a door side frame 1, a track frame 2, a screen door body 3, and a displacement lifting mechanism. The door side frame 1 is located on the outside of the entrance / exit, the track frame 2 is positioned opposite to the top of the side wall of the door side frame 1, and the screen door body 3 is located below the track frame 2. The displacement lifting mechanism includes a drive motor 4, a lead screw 5, a roller 6, a slider 7, a screw mechanism, a synchronization mechanism, a chain 8, a bellows 9, and a rigid adjustable mechanism. The drive motor 4 is mounted on the track frame 2, and its output shaft is connected to one end of the lead screw 5. Next, the roller 6 is mounted on the track frame 2, and the slider 7 is slidably mounted on the track frame 2. The roller 6 and the slider 7 are provided with through holes 10. The screw mechanism is set in the through hole 10 of the slider 7, and the synchronization mechanism is set in the through hole 10 of the roller 6. The lead screw 5 passes through the through holes 10 on the roller 6 and the slider 7 in sequence. One end of the chain 8 is wound around the roller 6, and the other end is connected to the top surface of the shielding door 3. The corrugated pipe 9 connects the slider 7 and the top surface of the shielding door 3. The rigidity adjustable mechanism is used to adjust the rigidity of the corrugated pipe 9.

[0020] This invention discloses a suspended lifting shielding door for electromagnetic shielding in an automotive laboratory. After installing a door side frame 1 on the outside of the laboratory entrance and exit, the shielding door 3 is placed inside the door side frame 1. The shielding door 3 can be opened and closed by a displacement lifting mechanism. The movement of the shielding door 3 includes forward and backward displacement as well as up and down lifting. When opening the door, the shielding door 3 first moves outward, stops moving after reaching the designated position, and then moves upward, finally hanging above the laboratory entrance. When closing the door, the steps are reversed: the shielding door 3 is first lowered, then driven to move inward, and finally shields and seals the laboratory entrance, isolating external electromagnetic influences and ensuring the accurate conduct of experiments within the laboratory.

[0021] Two rows of track frames 2 are installed at the top of the outer frame of the door. A drive motor 4 is mounted on the track frame 2, which drives the lead screw 5 to rotate. The lead screw 5 passes through through holes 10 on the roller 6 and the slider 7. A synchronization mechanism is installed in the through hole 10 of the roller 6 to achieve synchronous rotation between the roller 6 and the lead screw 5. A screw connection mechanism is installed in the through hole 10 of the slider 7 to achieve screw connection between the slider 7 and the lead screw 5. When the lead screw 5 rotates, the slider 7 converts the rotational motion of the lead screw 5 into linear motion. The bottom of the slider 7 is connected to the top surface of the shielding door 3, and a corrugated pipe 9 is installed between the slider 7 and the shielding door 3. The stiffness is adjusted... The joint mechanism adjusts the stiffness of the bellows 9. When opening and closing, the stiffness of the bellows 9 is at its maximum. The screw mechanism connects the slider 7 and the lead screw 5. When the slider 7 moves, it can drive the shielding door 3 to move backward synchronously through the bellows 9. After moving to the designated position, the stiffness adjustment mechanism adjusts the stiffness of the bellows 9 to the minimum. At the same time, the screw mechanism releases the connection between the slider 7 and the lead screw 5. The synchronization mechanism synchronizes the roller 6 and the lead screw 5. When the lead screw 5 rotates, the chain 8 on the roller 6 continuously winds up, thereby pulling the shielding door 3 upward. Finally, the shielding door 3 can rise above the laboratory door and be locked and supported.

[0022] Preferably, it also includes a support frame 11 and a limiting mechanism. One side of the support frame 11 is connected to the top of the shielding door 3 and is located below the track frame 2. The limiting mechanism is used to limit the rise of the shielding door 3. The limiting mechanism includes a plurality of limiting posts 12. The limiting posts 12 are arranged on the bottom surface of the track frame 2. The top surface of the side wall of the support frame 11 is provided with a limiting groove 13. When the support frame 11 rises, the limiting posts 12 are embedded in the limiting groove 13.

[0023] When the shielding door 3 rises, the limiting groove 13 will rise to the position of the limiting post 12 and make the limiting post 12 engage in the limiting groove 13, thereby limiting the rise of the shielding door 3. At this time, the rise of the shielding door 3 can be stopped. The support frame 11 can be used to buffer the rise and prevent the shielding door 3 from directly hitting the track frame 2.

[0024] Preferably, it also includes a support mechanism, which includes an electric telescopic rod 14, a locking seat 15 and a locking mechanism. The bottom end of the electric telescopic rod 14 is connected to the side wall of the shielding door 3. The locking seat 15 is located below the end of the support frame 11 away from the shielding door 3. The output shaft of the electric telescopic rod 14 extends into the locking seat 15 and is locked by the locking mechanism.

[0025] After the limiting post 12 is inserted into the limiting groove 13, the electric telescopic rod 14 can be activated. The electric telescopic rod 14 is set at an angle, and its output shaft can extend obliquely upward and eventually reach the locking seat 15. After locking is achieved through the locking seat 15, the shielding door 3 can be supported by the electric telescopic rod 14 to prevent it from falling.

[0026] Preferably, the locking mechanism includes a flexible balloon 16, a magnetorheological fluid 17, and an electromagnet 18. The output shaft of the electric telescopic rod 14 is connected to the flexible balloon 16. The magnetorheological fluid 17 is located in the flexible balloon 16. The outer wall of the locking seat 15 is provided with an embedding cavity 19. The inlet diameter of the embedding cavity 19 is smaller than the diameter of the flexible balloon 16. The electromagnet 18 is disposed inside the locking seat 15.

[0027] During support, the electric telescopic rod 14 can drive the flexible balloon 16 to move. When the flexible balloon 16 moves to the embedding cavity 19, the flexible balloon 16 will deform and enter the embedding cavity 19 because the entrance of the embedding cavity 19 is small. After the flexible balloon 16 enters the embedding cavity 19, the electromagnet 18 can be activated. The electromagnet 18 generates a magnetic field. Under the action of the magnetic field, the viscosity of the magnetorheological fluid 17 in the flexible balloon 16 increases, which makes the overall hardness of the flexible balloon 16 stronger, so that it cannot be taken out of the embedding cavity 19. The support of the shielding door 3 can be achieved by the flexible balloon 16, the locking seat 15 and the electric telescopic rod 14.

[0028] Preferably, the screw mechanism includes a first electric actuator 20 and an arc-shaped plate 21. The first electric actuator 20 is disposed on the inner wall of the through hole 10, and its output shaft is connected to the convex surface of the arc-shaped plate 21. The concave surface of the arc-shaped plate 21 is provided with threads, and the lead screw 5 passes through the concave surface of the arc-shaped plate 21.

[0029] When it is necessary to move the shielding door 3 by sliding block 7, the first electric push rod 20 is activated. The first electric push rod 20 can drive the arc plate 21 to move towards the lead screw 5, so that the lead screw 5 contacts and is screwed with the arc plate 21. Thus, the rotational motion of the lead screw 5 can be converted into the linear motion of the sliding block 7 through the arc plate 21 and the first electric push rod 20.

[0030] Preferably, it also includes side rails 22 and movable blocks 23. The side rails 22 are arranged opposite to each other on both sides of the door side frame 1, and the shielding door body 3 is located between the side rails 22. The side walls of the side rails 22 and the side walls of the shielding door body 3 are provided with sliding grooves 24. One side of the movable block 23 is located in the sliding groove 24 of the side rail 22, and the other side is located in the sliding groove 24 of the shielding door body 3.

[0031] To ensure the stable displacement and lifting of the shielding door 3, side rails 22 are provided on both sides of the door side frame 1, and sliding grooves 24 are provided on the side rails 22. At the same time, sliding grooves 24 are also provided on the side wall of the shielding door 3. The two sides of the movable block 23 are located in the sliding grooves 24 of the side rails 22 and the sliding grooves 24 of the shielding door 3, respectively. When the shielding door 3 is displaced, it can drive the movable block 23 to move along the sliding grooves 24 of the side rails 22 to achieve displacement limit. When the shielding door 3 is lifted or lowered, the sliding grooves 24 of its side wall can be lifted or lowered along the movable block 23 to achieve lifting or lowering limit.

[0032] Preferably, the rigid adjustable mechanism includes a collection box 25, an electrorheological fluid 26, a mesh electrode 27, and a flat electrode 28. The collection box 25 is disposed on the side wall of the slider 7. The top end of the bellows 9 extends into the collection box 25. The electrorheological fluid 26 fills the bellows 9. The mesh electrode 27 is disposed at the top end inside the bellows 9, and the flat electrode 28 is disposed at the bottom end inside the bellows 9.

[0033] When the shielding door 3 is closed, the bellows 9 is in a stretched state. When the door needs to be opened, the mesh electrode 27 and the flat electrode 28 are energized, the viscosity of the electrorheological fluid 26 increases, and the stiffness of the entire bellows 9 is enhanced. The displacement of the slider 7 can drive the shielding door 3 to move synchronously through the bellows 9. When it moves to the designated position, the energization of the mesh electrode 27 and the flat electrode 28 is cut off, and the electrorheological fluid 26 returns to a liquid state. When the shielding door 3 is raised and lowered by the roller 6 and the chain 8, the bellows 9 is squeezed and contracted, and the electrorheological fluid 26 inside is squeezed into the collection box 25, thus ensuring that the shielding door 3 can rise smoothly. When the door needs to be closed, the shielding door 3 descends, the bellows 9 is stretched, and the electrorheological fluid 26 flows into the bellows 9 from the collection box 25 under gravity. The stiffness of the bellows 9 can be adjusted by controlling the energization of the mesh electrode 27 and the flat electrode 28.

[0034] Preferably, the displacement lifting mechanism further includes a bearing seat 29, which is disposed on the top surface of the track frame 2, and the end of the lead screw 5 away from the drive motor 4 is electrically connected to the bearing seat 29.

[0035] When the drive motor 4 drives the lead screw 5 to rotate, the end of the lead screw 5 can rotate stably under the support of the bearing seat 29.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A suspended lifting shielding door, characterized in that, The device includes a door side frame, a track frame, a shielded door body, and a displacement lifting mechanism. The door side frame is located on the outside of the entrance / exit. The track frame is positioned opposite the top of the side wall of the door side frame, and the shielded door body is located below the track frame. The displacement lifting mechanism includes a drive motor, a lead screw, a roller, a slider, a screw connection mechanism, a synchronization mechanism, a chain, a bellows, and a rigid adjustable mechanism. The drive motor is mounted on the track frame, and its output shaft is connected to one end of the lead screw. The roller is mounted on the track frame, and the slider is slidably mounted on the track frame. The roller and the slider have through holes. The screw connection mechanism is located in the through hole of the slider, and the synchronization mechanism is located in the through hole of the roller. The lead screw passes through the through holes of the roller and the slider in sequence. One end of the chain is wound around the roller, and the other end is connected to the top surface of the shielded door body. The bellows connects the slider and the top surface of the shielded door body. The rigid adjustable mechanism is used to adjust the rigidity of the bellows.

2. A suspended lifting shielding door according to claim 1, characterized in that, It also includes a support frame and a limiting mechanism. One side of the support frame is connected to the top of the shielding door and is located below the track frame. The limiting mechanism is used to limit the rise of the shielding door.

3. A suspended lifting shielding door according to claim 2, characterized in that, The limiting mechanism includes several limiting posts, which are disposed on the bottom surface of the track frame. The top surface of the side wall of the support frame is provided with a limiting groove. When the support frame rises, the limiting posts are embedded in the limiting groove.

4. A suspended lifting shielding door according to claim 2, characterized in that, It also includes a support mechanism, which includes an electric telescopic rod, a locking seat, and a locking mechanism. The bottom end of the electric telescopic rod is connected to the side wall of the shielding door. The locking seat is located below the end of the support frame away from the shielding door. The output shaft of the electric telescopic rod extends into the locking seat and is locked by the locking mechanism.

5. A suspended lifting shielding door according to claim 4, characterized in that, The locking mechanism includes a flexible balloon, a magnetorheological fluid, and an electromagnet. The output shaft of the electric telescopic rod is connected to the flexible balloon. The magnetorheological fluid is located in the flexible balloon. An embedding cavity is provided on the outer wall of the locking seat. The inlet diameter of the embedding cavity is smaller than the diameter of the flexible balloon. The electromagnet is located inside the locking seat.

6. A suspended lifting shielding door according to claim 1, characterized in that, The screw mechanism includes a first electric actuator and an arc-shaped plate. The first electric actuator is disposed on the inner wall of the through hole, and its output shaft is connected to the convex surface of the arc-shaped plate. The concave surface of the arc-shaped plate is provided with threads, and the lead screw passes through the concave surface of the arc-shaped plate.

7. A suspended lifting shielding door according to claim 1, characterized in that, It also includes side rails and movable blocks. The side rails are arranged opposite each other on both sides of the door side frame, and the shielding door body is located between the side rails. The side walls opposite the side rails and the side walls of the shielding door body are provided with sliding grooves. One side of the movable block is located in the sliding groove of the side rail, and the other side is located in the sliding groove of the shielding door body.

8. A suspended lifting shielding door according to claim 1, characterized in that, The rigid adjustable mechanism includes a collection box, an electrorheological fluid, a mesh electrode, and a flat electrode. The collection box is disposed on the side wall of the slider, the top end of the bellows extends into the collection box, the electrorheological fluid fills the bellows, the mesh electrode is disposed at the top end inside the bellows, and the flat electrode is disposed at the bottom end inside the bellows.

9. A suspended lifting shielding door according to claim 1, characterized in that, The displacement lifting mechanism also includes a bearing housing, which is disposed on the top surface of the track frame, and the end of the lead screw away from the drive motor is electrically connected to the bearing housing.

10. A suspended lifting shielding door according to claim 1, characterized in that, The synchronization mechanism includes a second electric actuator and an abutment plate. The second electric actuator is disposed on the inner wall of the through hole, and its output shaft is connected to the abutment plate. The lead screw passes through the abutment plate.

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