High-bearing-capacity stacked folding movable threshold

Abstract

The invention provides a high-bearing laminated folding movable doorsill, which comprises a first bearing arm, a second bearing arm, a third bearing arm, a fourth bearing arm, a fifth bearing arm and a sixth bearing arm, the first movable arm is rotationally connected with the first bearing arm, and the first movable arm and the first bearing arm form a shear fork structure; and the lifting driving device is arranged on one side of the door opening, and the lifting driving device is rotationally connected with the first movable arm. The first supporting arm is rotated to be folded and erected through the shear fork structure, so that the folding movable threshold is folded to be located on the side face of the sliding door, and then the sliding door can be closed in a translation mode. After the sliding door is opened, the first supporting arm is rotated to be unfolded and horizontally flattened in the door opening through the shear fork structure, so that the folding movable doorsill is unfolded in the door opening, the interval between the door opening and the floor surface is filled, the inside and the outside of the doorsill are located on the same level, and no-doorsill free entering and exiting of vehicles and equipment are met.

Description

Technical Field

[0001] The invention relates to the technical field of civil air defense equipment, and in particular to a high-load-bearing stacked foldable movable threshold. Background Art

[0002] In some special occasions, such as military facilities, chemical plants, nuclear power plants, etc., there are extremely high requirements for the airtight performance of doors. Airtight doors can effectively prevent the leakage of dangerous substances such as toxic gases, harmful gases, liquids and dust within a certain range, and protect the safety of personnel and equipment.

[0003] In order to achieve good sealing performance, the existing sliding closed doors must be provided with a continuous sealing strip at the bottom of the door frame. When the sealing strip is above the horizon, there is a threshold of a certain height, which makes it impossible to enter or exit vehicles or equipment. When the sealing strip is below the horizon, a groove must be cut on the ground to meet the translational movement of the door leaf, and the gap between the door opening and the ground plane also hinders the entry and exit of vehicles and equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a high-load-bearing stacked foldable movable threshold, which can fill the gap between the door opening and the floor surface, and meet the requirements of free entry and exit of vehicles and equipment without a threshold;

[0005] The present invention provides a high-load-bearing stackable foldable movable threshold, comprising: a first load-bearing arm, the bottom of which is rotatably arranged in a door opening; a first movable arm, which is rotatably connected to the first load-bearing arm and forms a scissors-fork structure with the first load-bearing arm; and a lifting drive device, which is arranged at one side of the door opening and is rotatably connected to the first movable arm.

[0006] Furthermore, it also includes a plurality of second bearing arms arranged in an array along the inner direction of the door of the first bearing arm, and the bottom of the second bearing arm is movably arranged in the door opening.

[0007] Furthermore, it also includes a plurality of second movable arms arranged in an array in the direction of the first movable arm door.

[0008] Furthermore, the middle portion of the first movable arm is rotatably connected to the first bearing arm, the top portion of the first movable arm is rotatably connected to the lifting drive device, and the bottom portion of the first movable arm is rotatably connected to the bottom portion of the second bearing arm.

[0009] Furthermore, the middle part of each second bearing arm is rotatably connected to the second movable arm, the second movable arm is connected to the upper part of the previous adjacent bearing arm in the direction outside the door, and the second movable arm is connected to the bottom of the next adjacent bearing arm in the direction inside the door.

[0010] Furthermore, a roller is provided at the bottom of the second carrying arm.

[0011] Furthermore, the first bearing arm and the second bearing arm each include a lower arm and an upper arm, the bottom of the lower arm is arranged in the door opening, the upper arm is connected to the lower arm, and the upper arm and the lower arm form a stepped structure.

[0012] Furthermore, the upper arm of the first bearing arm is overlapped on the lower arm of the adjacent second bearing arm; the upper arm of the second bearing arm is overlapped on the lower arm of the adjacent second bearing arm.

[0013] Furthermore, the lifting drive device includes a motor and a screw, the motor is connected to one side of the screw, the motor is connected to and drives the screw through a worm gear, and the top of the first movable arm is rotatably connected to the screw; an electromagnetic brake is provided on the motor.

[0014] Furthermore, a handwheel is connected to the other side of the screw rod, and the handwheel is connected to and drives the screw rod.

[0015] According to the technical solution of the present invention, before the sliding door is closed, the lifting drive device controls one end of the first movable arm to be lifted and then the first movable arm is retracted and erected through the scissor structure, and at the same time the first support arm is rotated to be retracted and erected through the scissor structure, so that the foldable movable threshold is retracted and located at the side of the sliding door, and then the sliding door can be translated and closed. After the sliding door is opened, the lifting drive device controls one end of the first movable arm to be lowered and then the first movable arm is unfolded and horizontally arranged through the scissor structure, and at the same time the first support arm is rotated to be unfolded and horizontally arranged in the door opening through the scissor structure, so that the foldable movable threshold is unfolded in the door opening, filling the gap between the door opening and the floor surface, so that the inside and outside of the threshold are at the same level, and vehicles and equipment can freely enter and exit without a threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the carrying arm and the movable arm of the present invention;

[0018] Figure 2 A schematic diagram of the use of the present invention for filling a door opening;

[0019] Figure 3 A schematic diagram of the use of the folding door opening of the present invention;

[0020] Figure 4It is a schematic diagram of the lifting and lowering driving method of the first movable arm of the present invention;

[0021] Description of reference numerals:

[0022] 101-first bearing arm; 102-second bearing arm; 201-first movable arm; 202-second movable arm; 301-upper arm; 302-lower arm; 4-door opening; 5-lifting drive device; 501-motor; 502-screw rod; 503-electromagnetic brake; 504-quick positioning fixture; 505-clamp push rod; 506-electromagnetic brake unlocking push rod; 6-roller; 7-pin hole; 8-support bearing point; 9-handwheel. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1

[0027] like Figure 1-Figure 4As shown, the present invention provides a high-load-bearing stacked foldable movable threshold, including: a first load-bearing arm 101, the bottom of the first load-bearing arm 101 is rotatably arranged in the door opening 4; a first movable arm 201, the first movable arm 201 is rotatably connected to the first load-bearing arm 101, and forms a scissors-fork structure with the first load-bearing arm 101; a lifting drive device 5, the lifting drive device 5 is arranged on one side of the door opening 4, and the lifting drive device 5 is rotatably connected to the first movable arm 201.

[0028] Specifically, the middle part of the first movable arm 201 and the middle part of the first bearing arm 101 are hinged through the pin hole 7 to form an X-shaped scissor-type folding and stretching structure, the upper part of the first movable arm 201 is hinged to the lifting drive device 5 through the pin hole 7, and the lower part of the first bearing arm 101 is hinged to the door outside direction side in the door opening 4 through the pin hole 7. When the lifting drive device 5 controls the upper part of the first movable arm 201 to rise or fall, since the lower part of the first bearing arm 101 is rotated and fixed in the door opening 4, the corresponding first movable arm 201 and the first bearing arm 101 are folded and erected or unfolded and laid horizontally.

[0029] When the first movable arm 201 and the first supporting arm 101 are folded, the foldable movable threshold is located at one side of the sliding door, the door opening 4 is exposed, and the sliding door can be translated in the direction of closing the door. During the process, the door leaf is sealed with the airtight strip in the door opening 4 to achieve a closed door effect.

[0030] When the first movable arm 201 and the first bearing arm 101 are unfolded, the foldable movable threshold is located in the door opening 4, filling the gap between the door opening 4 and the floor surface, so that the inside and outside of the threshold are at the same level, allowing vehicles and equipment to enter and exit freely without a threshold.

[0031] Example 2

[0032] It also includes a plurality of second bearing arms 102 arrayed in the direction of the first bearing arm 101 in the door, and the bottom of the second bearing arm 102 is movably arranged in the door opening 4. It also includes a plurality of second movable arms 202 arrayed in the direction of the first movable arm 201 in the door. The middle part of the first movable arm 201 is rotatably connected to the first bearing arm 101, the top of the first movable arm 201 is rotatably connected to the lifting drive device 5, and the bottom of the first movable arm 201 is rotatably connected to the bottom of the second bearing arm 102. The middle part of each second bearing arm 102 is rotatably connected to the second movable arm 202, the second movable arm 202 is connected to the upper part of the previous adjacent bearing arm in the direction outside the door, and the second movable arm 202 is connected to the bottom of the next adjacent bearing arm in the direction inside the door. A roller 6 is provided at the bottom of the second bearing arm 102.

[0033] Specifically, the first carrying arm 101 and the plurality of second carrying arms 102 form an array structure. Different from the first carrying arm 101, the bottom of the first carrying arm 101 is hinged to one side of the door opening 4, while the bottom of the second carrying arm 102 can roll and move in the door opening 4 through the track roller 6. The roller 6 rolls along the door opening 4 or the track in the door opening 4, so that the movable arm drives the carrying arm to move, thereby realizing the folding and unfolding of the foldable movable threshold. According to the length of the door opening 4, the number of the second carrying arms 102 is set so that the foldable movable threshold can completely fill the door opening 4 when unfolded, or at least meet the distance requirement for vehicles to enter and exit the door opening 4.

[0034] The second supporting arm 102 adjacent to the first supporting arm 101 (located in the door inner direction of the first supporting arm 101, on the left side in the figure) is hinged at its bottom to the bottom of the first movable arm 201, its middle part is hinged to the middle part of a second movable arm 202, and its upper part is hinged to the upper part of another second movable arm 202. The other second supporting arms 102 are successively advanced to form a folding movable door sill with a scissors-type folding and extending structure.

[0035] A track may be provided in the door opening 4 to guide and facilitate the movement of the roller 6 .

[0036] In the present invention, the direction inside the door refers to the direction in which the foldable movable door sill is unfolded toward the inside of the door, which is the left direction in the figure; the direction outside the door refers to the direction in which the foldable movable door sill is retracted toward the outside of the door, which is the right direction in the figure.

[0037] Example 3

[0038] The first bearing arm 101 and the second bearing arm 102 include a lower arm 302 and an upper arm 301. The bottom of the lower arm 302 is arranged in the door opening 4. The upper arm 301 is connected to the lower arm 302. The upper arm 301 and the lower arm 302 form a stepped structure. The upper arm 301 of the first bearing arm 101 is overlapped on the lower arm 302 of the adjacent second bearing arm 102; the upper arm 301 of the second bearing arm 102 is overlapped on the lower arm 302 of the adjacent second bearing arm 102.

[0039] Specifically, in the third embodiment, the lower arm 302 and the upper arm 301 form a load-bearing arm with a stepped structure, so as to realize stacked force bearing and effectively improve the force bearing strength of the load-bearing arm.

[0040] Specifically, the stepped structure is as follows: the upper arm 301 is connected to the lower arm 302, and the upper end of the upper arm 301 extends out of the upper end of the lower arm 302, and the lower end of the lower arm 302 extends out of the lower end of the upper arm 301, thereby forming a stepped structure, and the movable arm is hinged at the connection between the upper end of the lower arm 302 and the upper arm 301; when the foldable movable threshold is unfolded, the upper arm 301 of the adjacent load-bearing arm on the right side (outside the door) extends out of the part of the lower arm 302, and overlaps the part of the lower arm 302 of the adjacent load-bearing arm on the left side (inside the door) that extends out of the upper arm 301, so that the upper arms 301 of all the load-bearing arms will not be suspended in the air, and will be stacked with the lower arms 302 of the adjacent load-bearing arms. When a vehicle passes by, the vehicle stability and the threshold bearing capacity are effectively improved.

[0041] In this embodiment, when the foldable active threshold is unfolded, the track wheel hinge applies pressure to the front bearing arm through the rear bearing arm (for example, the first bearing arm applies pressure to the second bearing arm), forming a mutually restrained high-load-bearing stacked structure, effectively avoiding the bouncing condition of ordinary hinges when passing by, and having high stability when passing by. At the same time, multiple support bearing points 8 are set on the bearing arm. When the foldable active threshold is unfolded, the single-piece bearing arm forms multi-point support through the front and rear rollers and multiple adjustable support points. By adopting a multi-point bearing structure, the bearing capacity of the foldable threshold is further improved, the threshold bearing pressure is effectively dispersed, and the bearing capacity is greatly improved; and the bouncing and tilting condition of ordinary hinges when passing by are effectively avoided, and the stability of the threshold when passing by is improved.

[0042] The first movable arm 201 and the second movable arm 202 are of a bent structure, that is, the middle part is hinged to the load-bearing arm, and the two sides of the middle hinge are obtuse angles.

[0043] Example 4

[0044] The lifting drive device 5 includes a motor 501 and a screw rod 502. The motor 501 is connected to one side of the screw rod 502. The motor 501 is connected to and drives the screw rod 502 through a worm gear. The top of the first movable arm 201 is rotatably connected to the screw rod 502. An electromagnetic brake 503 is provided on the motor 501. The other side of the screw rod 502 is connected to a hand wheel 9, which is connected to and drives the screw rod 502.

[0045] Specifically, in this embodiment, by arranging the motor 501 and the hand wheel 9 on both sides of the screw rod 502, it is possible to control the screw rod 502 through the hand wheel 9 when the motor 501 stops, and continue to complete the unfolding and folding actions of the folding movable door sill. An offline structure is adopted between the hand wheel 9 and the screw rod 502. For example, when the motor 501 is working, the connection between the hand wheel 9 and the screw rod 502 is disconnected to prevent the hand wheel 9 from being driven to rotate; when the motor 501 is not working, the hand wheel 9 can be controlled to be connected to the screw rod 502, so as to continue to unfold and fold.

[0046] The folding movable threshold adopts a driving motor 501 directly connected to a worm gear screw 502 lifter, and the rotational motion of the motor 501 is converted into a vertical lifting motion of the screw 502, thereby driving the lifting motion of the movable arm in a straight line. The worm gear screw 502 lifter adopts a trapezoidal screw 502 lifting structure, which has good self-locking performance, prevents the threshold from unfolding in a non-working state, and ensures safe use. The driving motor 501 uses a brake motor 501 to further ensure the safety of the movable threshold movement. It is provided with an electromagnetic brake 503 at the tail of the motor 501. When the motor 501 is powered on, the electromagnetic brake 503 is powered on and attracted at the same time, and it does not brake the motor 501 at this time; when the motor 501 is powered off, the electromagnetic brake 503 is powered off at the same time, and the brake brakes the motor 501 under the action of the spring to prevent the folding threshold from falling, effectively ensuring the safety of the threshold movement.

[0047] A quick positioning fixture 504 is provided on the driving motor 501, and a single person can realize quick manual action by the quick positioning fixture 504. During manual operation, the fixture push rod 505 is pushed to drive the electromagnetic brake 503 unlocking push rod 506 to be in an unlocked state, so that it is fixed at the dead point position, thereby the electromagnetic brake 503 is attracted, and the motor 501 is unlocked. At this time, the hand wheel 9 can be operated from the side to realize the folding and unfolding of the door sill. The hand wheel 9 is set at a height of 1100mm above the horizontal plane, which meets the ergonomic operation specifications.

[0048] Working mode and principle of the present invention:

[0049] The folding movable threshold adopts a scissor-type folding and stretching method, and the load-bearing arms are stacked and pressed to make the entire movable threshold bear the force together. It effectively avoids the jumping condition of ordinary hinges when passing by, and improves the stability and rigidity of the threshold when passing by. The driving motor 501 is directly connected to the worm screw 502 elevator to drive the lifting and lowering movement of the movable arm in a straight line to achieve the electric folding and unfolding action of the folding threshold. The folding threshold is set on one side of the door frame, which reduces the slot size and improves the space utilization rate. It shares the translation guide rail with the door leaf, which improves the utilization rate of materials. At the same time, it can be linked with the door leaf translation, and there is no need to move the threshold after the door leaf is fully opened, which greatly improves the opening and closing time of the whole machine. It ensures the safety of the threshold movement through the redundant dual protection of the brake motor 501 and the trapezoidal screw 502.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. High load-bearing stacked folding movable threshold, characterized by: include: A first bearing arm, the bottom of which is rotatably disposed in the door opening; A first movable arm, the first movable arm is rotatably connected to the first bearing arm and forms a scissor-fork structure with the first bearing arm; A lifting drive device is arranged at one side of the door opening and is rotatably connected to the first movable arm.

2. The high-load-bearing stacked foldable active door sill according to claim 1, characterized in that: It also includes a plurality of second bearing arms arranged in an array along the inner direction of the door of the first bearing arm, and the bottom of the second bearing arm is movably arranged in the door opening.

3. The high-load-bearing stacked foldable active door sill according to claim 2, characterized in that: It also includes a plurality of second movable arms arranged in an array in the direction of the first movable arm door.

4. The high-load-bearing stacked foldable active door sill according to claim 3, characterized in that: The middle portion of the first movable arm is rotatably connected to the first bearing arm, the top portion of the first movable arm is rotatably connected to the lifting drive device, and the bottom portion of the first movable arm is rotatably connected to the bottom portion of the second bearing arm.

5. The high-load-bearing stacked foldable movable door sill according to claim 3, characterized in that: The middle part of each second bearing arm is rotatably connected to the second movable arm, the second movable arm is connected to the upper part of the previous adjacent bearing arm in the direction outside the door, and is connected to the bottom of the next adjacent bearing arm in the direction inside the door.

6. The high-load-bearing stacked foldable active door sill according to claim 2, characterized in that: A roller is provided at the bottom of the second carrying arm.

7. The high-load-bearing stacked foldable active door sill according to claim 2, characterized in that: The first bearing arm and the second bearing arm both include a lower arm and an upper arm, the bottom of the lower arm is arranged in the door opening, the upper arm is connected to the lower arm, and the upper arm and the lower arm form a stepped structure.

8. The high-load-bearing stacked foldable active door sill according to claim 7, characterized in that: The upper arm of the first bearing arm is overlapped on the lower arm of the adjacent second bearing arm; the upper arm of the second bearing arm is overlapped on the lower arm of the adjacent second bearing arm.

9. The high-load-bearing stacked foldable active door sill according to claim 1, characterized in that: The lifting drive device includes a motor and a screw rod, wherein the motor is connected to one side of the screw rod, the motor is connected to and drives the screw rod through a worm gear, and the top of the first movable arm is rotatably connected to the screw rod; an electromagnetic brake is provided on the motor.

10. The high-load-bearing stacked foldable active door sill according to claim 9, characterized in that: The other side of the screw rod is connected with a hand wheel, and the hand wheel is connected to and drives the screw rod.

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