A connecting rod rotation locking end gate device

Abstract

This invention discloses a linkage-driven rotating locking end door device, comprising a door frame assembly (2), a frame back plate (3), a linkage assembly (4), a frame front plate (5), and an end door frame assembly (6). The door frame assembly (2) is installed on the ring rib of the box body, and a groove (202) for the latch (407) to extend into is arranged on the inner periphery of the frame of the door frame assembly (2). A lock groove (601) corresponding to the position of the groove (202) is arranged on the outer periphery of the inner side of the end door frame assembly (6), and the latch (407) is movably installed in the lock groove (601). The frame back plate (3) and the frame front plate (5) are assembled on the inner side of the end door frame assembly (6) by screws (904) and spacers (905). The linkage assembly (4) is assembled between the frame back plate (3) and the frame front plate (5). The linkage assembly (4) drives the latch (407) to enter or leave the groove (202). This invention has good practical application value.

Description

Technical Field

[0001] This invention belongs to the field of packaging box end door design technology, specifically a linkage rotation locking end door device. Background Technology

[0002] Sealed packaging boxes with end-opening structures typically consist of a box body, end doors, and a trolley. The end doors, as a crucial sealing device, play a key role in ensuring the airtightness of the box. Common sealing packaging box end doors use either circumferentially distributed snap-fit ​​seals or multiple circumferentially bolted seals.

[0003] The latch-on sealing structure often causes damage to the latch at the bottom edge of the end door of the enclosure, affecting the performance of the equipment; the bolt-on sealing structure is prone to thread stripping and failure. These two types of sealing structures not only have a high failure rate in the use of existing equipment, but also have problems such as inconvenience in operation and excessively long operation time.

[0004] With the increasing demands for equipment support efficiency, traditional fixed and sealed end-door structures can no longer meet the requirements of future rapid service management. Therefore, a rapidly opening and closing sealed packaging box is needed to satisfy these requirements. Summary of the Invention

[0005] The purpose of this invention is to design a linkage rotation locking end door device to realize the function of rapid rotation opening and closing of the end door of the packaging box, thereby improving the opening and closing speed and meeting the requirements of rapid duty management.

[0006] This invention is achieved using the following technical solution: A linkage-driven rotating locking end door device includes: a hinge assembly, a door frame assembly, a frame back plate, a linkage assembly, a frame front plate, an end door frame assembly, a composite end door, and a rotating handle assembly.

[0007] The door frame assembly is installed on the ring rib of the box body. A groove for the latch to extend into is arranged on the inner periphery of the door frame assembly. A lock groove corresponding to the groove is arranged on the outer periphery of the inner side of the end door frame assembly, and a latch is movably installed within the lock groove. The frame back plate and frame front plate are fitted to the inner side of the end door frame assembly with screws and spacers. The linkage assembly is assembled between the frame back plate and the frame front plate. The linkage assembly drives the latch to enter or leave the groove. The end door seat plate of the hinge assembly is connected to the end door frame assembly after passing through the frame back plate and frame front plate with screws. The box seat plate of the hinge assembly is connected to the box body with screws. The composite end door is installed on the outer side of the end door frame assembly. The rotating handle assembly drives the linkage assembly to operate.

[0008] More preferably, the connecting rod assembly includes a spindle, cranks, a lever rotating component, a double-ended stud connector, a straight connecting rod, a connecting rod, and a locking tongue; the spindle has a core disk at its rear, and the spindle is mounted on the frame back plate and frame front plate respectively on both sides of the core disk via mounting bearings; an outer disk and an inner disk are mounted opposite each other on both sides of the core disk, and multiple cranks are mounted circumferentially between the outer disk and the inner disk; one end of each crank is hinged to the corresponding mounting through holes on the outer disk and the inner disk via the disk shaft, and the other end of the crank is hinged to the force-saving end of the lever rotating component; Multiple lever rotating components are movably assembled at corresponding positions between the frame back plate and the frame front plate; the force-reducing end of each lever rotating component is hinged to the ring end of a double-ended stud connector, the rod end of the double-ended stud connector is connected to one end of a straight connecting rod via a double-ended stud, the other end of the straight connecting rod is hinged to the end head of a connecting rod, the rod portion of the connecting rod passes through the through-hole channel of the locking tongue and its end is threaded with a nut, and a compression spring I is threaded through the rod portion of the connecting rod, the compression spring I causing the nut to engage with the through-hole channel under normal conditions; each lever rotating component drives multiple locking tongues to move synchronously.

[0009] More preferably, the lever rotating component rotates around the rotating fixed sleeve; the flange of the rotating fixed sleeve is fixedly connected to the frame plate by screws, the end face of the rotating fixed sleeve is positioned with the through hole of the frame back plate by an inner positioning ring protrusion and then fixedly connected by screws, the rotating sleeve is fixedly installed at the through hole of the lever rotating component, and the rotating sleeve is fitted onto the surface of the rotating fixed sleeve.

[0010] Further preferably, the rotating handle assembly includes a rotating handle fixing sleeve, the inner end face of which is provided with a positioning ring sleeve, and the outer surface of the inner end of the rotating handle fixing sleeve is provided with an outer positioning ring protrusion; the inner end of the rotating handle fixing sleeve passes through the through hole of the end frame assembly and is positioned by the outer positioning ring protrusion, and the positioning ring sleeve is fitted into the through hole of the frame plate; the inner end face of the rotating handle fixing sleeve is fixedly connected to the frame plate by screws; the inner end face of the rotating handle fixing sleeve is provided with stepped cavity I and stepped cavity II in sequence, a bearing is installed in stepped cavity I, and an oil seal is installed in stepped cavity II; the core rod of the mandrel passes through the rotating handle... The inner cavity of the handle fixing sleeve has two symmetrically arranged sliding grooves along the axial direction on the core rod. The front part of the two sliding grooves is provided with a limiting groove I, and the rear part is provided with a limiting groove II. The inner cavity of the rotating handle fixing sleeve is equipped with a pull-out hollow sleeve. The rear part of the inner cavity of the pull-out hollow sleeve is provided with an inner ring protrusion. The rear end of the inner cavity of the pull-out hollow sleeve is provided with two rectangular grooves along the axial direction. A locking block is installed in the rectangular groove by a locking block fixing pin. A compression spring II is installed in the blind hole of the locking block so that the locking block is located in the sliding groove of the core rod in the normal state. The stroke of the locking block is between the limiting groove I and the limiting groove II. The rear end of the pull-out hollow sleeve is fitted with a cap by screws.

[0011] In a further preferred embodiment, a POM sleeve and a nylon sleeve are sequentially installed in front of the inner ring protrusion within the inner cavity of the pull-out hollow sleeve. The POM sleeve is positioned by a set screw, and a plug is installed on the end face of the core rod by a screw. When the locking block is located in the limiting groove I, the POM sleeve, the nylon sleeve, and the plug abut against each other. A stainless steel sleeve is fixedly installed in the inner cavity of the rotating handle fixing sleeve, and the pull-out hollow sleeve slides in conjunction with the stainless steel sleeve. An inner circular groove is provided at the inner port of the rotating handle fixing sleeve, and a retaining ring for fixing the stainless steel sleeve is installed in the inner circular groove.

[0012] More preferably, the front of the pull-out hollow sleeve is provided with a threaded section and a smooth section. The threaded section at the front of the pull-out hollow sleeve is connected to the threaded sleeve via a threaded handle. The outer truncated cone of the handle is connected to the handle via a screw. The outer truncated cone is positioned by installing a set screw in a set screw hole along its circumference to achieve the positioning of the handle-connected threaded sleeve. The smooth section at the front of the handle-connected threaded sleeve is inserted into the central hole of the handle to achieve a positioning fit.

[0013] More preferably, the composite end door has a handle groove in the middle for placing a handle.

[0014] More preferably, the number of cranks is four, each corresponding to one of the four lever rotating parts; each lever rotating part drives three locking tongues to move, that is, there are 12 locking grooves arranged around the periphery of the end door frame assembly.

[0015] More preferably, the disc shaft is integrally formed by a central cylinder and two cylindrical platforms on both sides; the central cylinder of the disc shaft is fitted into a mounting through hole at one end of the crank, and the cylindrical platforms on both sides of the disc shaft are respectively fitted into the mounting through holes of the outer disc and the inner disc.

[0016] During operation, pulling the handle activates the pull-out hollow sleeve via the threaded sleeve. The hollow sleeve slides outward along the stainless steel sleeve, while the locking blocks move from limit groove II to limit groove I. Both locking blocks remain within the two grooves of the mandrel. After the handle is fully extended, rotating it drives the mandrel through the pull-out hollow sleeve and the mandrel, rotating the mandrel disc. This rotation, via the crank, drives the lever to retract, retracting the connecting rod and the connecting rod. This, in turn, drives the latch to move back within the lock groove, disengaging from the recess in the door frame assembly, thus opening the end door. Conversely, closing the end door involves rotating the handle in the opposite direction, causing the latch to move in and out of the lock groove, entering the recess in the door frame assembly, closing the end door. Finally, pushing the handle back to its original position allows the pull-out hollow sleeve to slide between the rotating handle's fixed sleeve and the mandrel, moving the locking blocks from limit groove I to limit groove II, retracting the handle into the handle groove of the composite end door.

[0017] The linkage rotation locking end door device structure described in this invention specifically relates to the mechanical mechanism of the linkage assembly and the structure of the rotary handle assembly. The handle assembly allows for pull-out operation, facilitating easier operation during twisting. The shapes of the crank plate assembly and the rotary plate assembly in the linkage assembly are designed to occupy minimal space during mechanism movement while ensuring sufficient rigidity of the transmission components to transmit torque. This structural design and arrangement also saves space, increases rotational torque, improves component rigidity, and reduces design weight.

[0018] This invention is reasonably designed and has great practical application value. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram showing the components of the present invention.

[0022] Figure 2 This diagram illustrates the connection between the frame front panel, frame back panel, and hinge assembly.

[0023] Figure 3 This is an enlarged schematic diagram of the end door plate of the hinge assembly.

[0024] Figure 4 This diagram illustrates the fit between the groove and the latch in the door frame assembly.

[0025] Figure 5 This is a schematic diagram of the lock block structure.

[0026] Figure 6 This is a schematic diagram of the skeleton back plate structure.

[0027] Figure 7 This is a schematic diagram of the skeleton plate structure.

[0028] Figure 8 Schematic diagram of mandrel structure Figure 1 .

[0029] Figure 9 Schematic diagram of mandrel structure Figure 2 Figure 10 This is a schematic diagram of the inner disk structure.

[0030] Figure 11 This diagram shows the assembly of the inner disc and the spindle.

[0031] Figure 12 This diagram shows the assembly of the outer disk and the spindle.

[0032] Figure 13 This is a schematic diagram of the disk shaft structure.

[0033] Figure 14 This shows a schematic diagram of the crank assembly.

[0034] Figure 15 This is a schematic diagram of the linkage assembly structure.

[0035] Figure 16 This is a schematic diagram of the rotating sleeve structure.

[0036] Figure 17 This is a schematic diagram of the rotating fixed sleeve structure.

[0037] Figure 18 This is a schematic diagram of a double-ended screw connector.

[0038] Figure 19 This is a schematic diagram of a straight connecting rod structure.

[0039] Figure 20 This is a schematic diagram of the connecting rod structure.

[0040] Figure 21 This is a schematic diagram of the nut structure.

[0041] Figure 22 This diagram illustrates the connection between the connecting rod and the locking tongue.

[0042] Figure 23 This is a schematic diagram of the end door frame assembly.

[0043] Figure 24 This is a schematic diagram of the lock groove.

[0044] Figure 25 This is a schematic diagram showing the assembly of the rotary handle assembly.

[0045] Figure 26 This diagram shows the structure of the rotating handle fixing sleeve.

[0046] Figure 27 This is a schematic diagram of a pull-out hollow sleeve structure.

[0047] Figure 28 This is a schematic diagram of the card block structure.

[0048] Figure 29 This is a schematic diagram of the threaded sleeve structure for connecting the handle.

[0049] Figure 30This diagram illustrates the connection between the threaded sleeve and the handle.

[0050] Figure 31 This is a schematic diagram of a composite material end door.

[0051] In the diagram: 1-Hinge assembly, 101-End door seat plate, 102-Box seat plate; 2-Box door frame assembly, 201-Lock block, 202-Groove; 3-Frame back plate; 4-Linkage device assembly, 401-Spindle, 402-Crank, 403-Lever rotating component, 404-Double-ended screw connector, 405-Straight connecting rod, 406-Connecting rod, 407-Lock tongue, 408-Core disc, 409-Core rod, 410-Outer disc. 411-Inner disc, 412-Disc shaft, 413-Through hole, 414-Nut, 415-Compression spring I, 416-Rotating fixed sleeve, 417-Flange, 418-Sleeve end face, 419-Sleeve surface, 420-Inner locating ring protrusion, 421-Slide groove, 422-Rotating sleeve, 423-Limiting groove I, 424-Limiting groove II, 425-POM sleeve, 426-Nylon sleeve, 427-Plug, 428 - Central cylinder, 429- Cylindrical platform, 430- Double-ended stud, 431- Pin; 5- Frame plate; 6- End door frame assembly, 601- Lock groove; 7- Composite end door, 701- Handle groove; 8- Rotary handle assembly, 801- Rotary handle fixing sleeve, 802- Positioning ring sleeve, 803- Positioning ring protrusion, 804- Stepped cavity I, 805- Stepped cavity II, 806- Stainless steel sleeve, 807- Inner circular groove, 808- Stop 810-Pull-out hollow sleeve, 811-Inner ring protrusion, 812-Rectangular groove, 813-Clipping fixing pin, 814-Clipping block, 815-Blind hole, 816-Compression spring II, 817-Threaded section, 818-Smooth section, 819-Handle, 820-Handle connecting threaded sleeve, 821-Outer frustum, 822-Setting screw hole; 901-Bearing, 902-Oil seal, 903-Setting screw, 904-Screw, 905-Spacer.

[0052] Note: The orientation is defined in this invention as follows, with reference to Figure 25: the right side is front and the left side is back. Detailed Implementation

[0053] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0054] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0055] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0056] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0057] A linkage rotation locking end door device, such as Figure 1 As shown, it includes hinge assembly 1, door frame assembly 2, frame back panel 3, connecting rod assembly 4, frame front panel 5, end door frame assembly 6, composite end door 7, and rotating handle assembly 8.

[0058] A ring of countersunk through holes around the door frame assembly 2 is screwed onto the ring rib of the box body. Multiple locking blocks 201 are screwed onto the inner circumference of the door frame assembly 2. Figure 4 , Figure 5 As shown, the lock block 201 is provided with a groove 202, that is, the inner periphery of the frame of the door frame assembly 2 is provided with a groove 202 for the lock tongue 407 to extend into.

[0059] like Figure 23 As shown, the inner side of the end door frame assembly 6 has a lock groove 601 corresponding to the position of the groove 202 arranged on its outer periphery, such as... Figure 24 As shown, a locking tongue 407 is movably installed in the locking groove 601.

[0060] like Figure 2 As shown, the end door base plate 101 of the three hinge assemblies 1 is connected to the end door frame assembly 6 via screws 904 passing through the frame back plate 3 and frame front plate 5. The housing base plate 102 of the hinge assembly 1 is connected to the housing via screws 904. The hinge assembly 1 has a "Z" shaped structure, which is a prior art structure, as seen in patent publication (CN116923885A, title: An Inward-Snapping Turning Hinge Mechanism). The hinge assembly 1 is mainly used to facilitate the rotation and opening of the end door.

[0061] like Figure 5 , Figure 6As shown, the frame back plate 3 and frame front plate 5 have similar structures. Designed as sheet metal components to balance rigidity and lightweight, they primarily support and fix the linkage assembly 4. The frame back plate 3 and frame front plate 5 are assembled to the inner side of the end door frame assembly 6 using screws 904 and spacers 905. The distance between the frame back plate 3 and frame front plate 5 is the thickness of the spacer 905. The linkage assembly 4 is assembled between the frame back plate 3 and frame front plate 5. The rotating handle assembly 8 drives the linkage assembly 4, which in turn drives the locking tongue 407 into or out of the groove 202. The composite end door 7 is installed on the outer side of the end door frame assembly 6.

[0062] The linkage assembly 4 is the core motion mechanism of the entire device, mainly including spindle 401, crank 402, lever rotating part 403, double-ended stud connector 404, straight connecting rod 405, connecting rod 406, locking tongue 407, etc.

[0063] like Figure 8 , Figure 9 As shown, the mandrel 401 is T-shaped, and the rear of the mandrel 401 is provided with a core disk 408. The core rod 409 is provided with two symmetrical sliding grooves 421 along the axial direction. The front of the two sliding grooves 421 is provided with a limiting groove I 423 and the rear is provided with a limiting groove II 424.

[0064] like Figure 10 , Figure 12 As shown, an outer disk 410 and an inner disk 411 are mounted opposite each other on both sides of the core disk 408. Figure 11 As shown, four cranks 402, arranged in an "S" shape, are mounted circumferentially between the outer disk 410 and the inner disk 411; these are sheet-like parts. Figure 14 As shown, one end of the crank 402 is hinged to the corresponding mounting through holes on the outer disk 410 and the inner disk 411 via the disk shaft 412. Figure 13 As shown, the disc shaft 412 is integrally formed by a central cylinder 428 and two cylindrical platforms 429 on both sides; the central cylinder 428 of the disc shaft 412 is fitted into the mounting through hole at one end of the crank 402, and the cylindrical platforms 429 on both sides of the disc shaft 412 are respectively fitted into the mounting through holes of the outer disc 410 and the inner disc 411.

[0065] Each lever rotating component 403 can be composed of two sheet parts (fastened together by screws), with a total of four sets, and the parts have a "knife handle" shaped structure.

[0066] like Figure 15 As shown, the other end of the crank 402 is hinged to the force-saving end of the lever rotating component 403, with the hinge method being the same as that of the disc rotating shaft structure. The four lever rotating components 403 are respectively assembled at corresponding positions between the frame back plate 3 and the frame front plate 5 via rotation. The lever rotating components 403 rotate around the rotating fixing sleeve 416; as... Figure 17As shown, the flange 417 of the rotating fixed sleeve 416 is fixedly connected to the frame plate 5 by screws. The end face 418 of the rotating fixed sleeve 416 is positioned with the through hole of the frame back plate 3 by the inner positioning ring protrusion 420 and then fixedly connected by screws. The rotating sleeve 422 is fixedly installed at the through hole of the lever rotating component 403, as shown. Figure 16 As shown, the rotating sleeve 422 is fitted onto the sleeve surface 419 of the rotating fixed sleeve 416. (As indicated...) Figures 18 to 22 As shown, the force-reducing end of the lever rotating component 403 is hinged to the ring end of the double-ended stud connector 404. The rod end of the double-ended stud connector 404 is connected to one end of the straight connecting rod 405 via a double-ended stud 430. The other end of the straight connecting rod 405 is hinged to the end head of the connecting rod 406. The rod portion of the connecting rod 406 passes through the through-hole channel 413 of the latch 407, and its end is threadedly connected to a nut 414. A compression spring I 415 is threaded onto the rod portion of the connecting rod 406. The compression spring I 415 causes the nut 414 to engage with the through-hole channel 413 under normal conditions. The compression spring I 415 is mainly used for preload compensation. During vibration or movement, it ensures uniform thrust of each latch through compression deformation. Each lever rotating component 403 drives three latches 407 to move synchronously.

[0067] like Figure 23 As shown, the end door frame assembly 6 mainly includes a main panel and ring ribs. The front of the end door frame assembly has a grid-shaped facade rib for weight reduction and to enhance panel rigidity. The back of the end door frame assembly 6 has 12 lock slots 601 arranged around its perimeter. Figure 24 As shown, it is used as a sliding guide for the latch 407. The central circular hole of the end door frame assembly 6 mates with the rotating handle assembly 8, and the side edge is flat for pressing the sealing strip after the end door is closed.

[0068] like Figure 25 As shown, the spindle 401 is mounted on the skeleton back plate 3 and the skeleton front plate 5 on both sides of the core disk 408 via assembly bearings 901.

[0069] The rotary handle assembly 8 is the core transmission mechanism of the entire device, mainly including 2 sealed bearings, 1 oil seal, 1 rotary handle fixing sleeve, 1 pull-out hollow steel sleeve, 2 POM set screws, 2 locking blocks, 2 compression springs II, 2 locking block fixing pins, 1 POM sleeve, 1 nylon sleeve, 1 spindle plug, 1 stainless steel sleeve, 1 hole retaining ring, 1 handle connecting threaded sleeve, handle connecting threaded sleeve set screw, and handle.

[0070] like Figure 25 , Figure 26As shown, the inner end face of the rotating handle fixing sleeve 801 is provided with a positioning ring sleeve 802, and the outer surface of the inner end of the rotating handle fixing sleeve 801 is provided with an outer positioning ring protrusion 803. The inner end of the rotating handle fixing sleeve 801 passes through the through hole of the end door frame assembly 6 and is positioned by the outer positioning ring protrusion 803. The positioning ring sleeve 802 is fitted into the through hole of the frame plate 5. The inner end face of the rotating handle fixing sleeve 801 is fixedly connected to the frame plate 5 by screws. The inner end face of the rotating handle fixing sleeve 801 is provided with stepped cavity I 804 and stepped cavity II 805 in sequence. The bearing 901 is installed in stepped cavity I 804, and the oil seal 902 is installed in stepped cavity II 805. The core rod 409 of the spindle 401 passes through the inner cavity of the rotating handle fixing sleeve 801, that is, the pull-out hollow sleeve 810 is assembled between the rotating handle fixing sleeve 801 and the core rod 409.

[0071] like Figure 25 , Figure 27 As shown, the inner cavity of the rotating handle fixing sleeve 801 is equipped with a pull-out hollow sleeve 810 to ensure smooth directional sliding during insertion and removal; the rear part of the inner cavity of the pull-out hollow sleeve 810 is provided with an inner ring protrusion 811, and the rear end of the inner cavity of the pull-out hollow sleeve 810 is provided with two rectangular grooves 812 symmetrically arranged along the axial direction. A locking block 814 is installed in the rectangular grooves 812 through a locking pin 813, as shown. Figure 28 As shown, a compression spring II 816 is installed in the blind hole 815 of the locking block 814, so that the locking block 814 is normally located in the sliding groove 421 of the core rod 409. The rectangular groove is mainly used for the assembly of the locking block and the compression spring II, and the locking block is constrained to rotate only along the axis of the hole by the locking block fixing pin through the hole. The stroke of the locking block 814 is located between the limiting groove I 423 and the limiting groove II 424; the rear end of the pull-out hollow sleeve 810 is covered with a cap by screws to ensure that the combination of the locking block and the compression spring II will not fall off.

[0072] like Figure 25 As shown, the inner cavity of the pull-out hollow sleeve 810 is located in front of the inner annular protrusion 811, where a POM sleeve 425 and a nylon sleeve 426 are installed sequentially. The inner annular protrusion is mainly used to limit the movement of the POM sleeve and to constrain its movement by screwing in a set screw through a threaded hole. That is, the POM sleeve 425 is positioned by the set screw (set screw). The end face of the core rod 409 is fitted with a plug 427 by a screw. When the locking block 814 is located in the limiting groove I 423, the POM sleeve 425, the nylon sleeve 426, and the plug 427 abut against each other. The pull-out hollow sleeve cooperates with the stainless steel sleeve, making the pull-out hollow steel sleeve smooth.

[0073] like Figure 25 , Figure 26As shown, a stainless steel sleeve 806 is fixedly installed in the inner cavity of the rotating handle fixing sleeve 801, and a pull-out hollow sleeve 810 slides in fit with the stainless steel sleeve 806; the inner cavity port of the rotating handle fixing sleeve 801 is provided with an inner circular groove 807, and a retaining ring 808 for fixing the stainless steel sleeve 806 is installed in the inner circular groove 807. The inner circular groove is mainly used for the retaining ring and further restricts the movement of the stainless steel sleeve, so that it only has a rotational function.

[0074] like Figure 25 , Figure 27 As shown, the front of the pull-out hollow sleeve 810 has a threaded section 817 and a smooth section 818 (both are stepped). The threaded section 817 at the front of the pull-out hollow sleeve 810 is connected to the threaded sleeve 820 via a threaded installation handle. Figure 29 As shown, the outer frustum 821 of the handle connecting threaded sleeve 820 is connected to the handle 819 by screws; the outer frustum 821 is positioned by a set screw 903 installed in the set screw hole 822 along its circumference; the smooth section 818 at the front of the handle connecting threaded sleeve 820 is inserted into the center hole of the handle 819 to achieve a positioning fit. Figure 30 As shown.

[0075] During installation, connect the locking block 814, compression spring II 816, and locking block fixing pin 813 to the pull-out hollow sleeve 810. Install the POM sleeve 425, nylon sleeve 426, and POM set screw, sliding them into the groove 421 of the spindle 401. Connect the spindle sleeve 401 to the threaded hole fixed to the spindle 401 through the two holes of the spindle plug 427 with screws. Then install the rotating handle fixing sleeve 801, stainless steel sleeve 806, and hole retaining ring 808, and connect the rotating handle fixing sleeve 801 to the frame plate 5 with screws. Then install the handle connecting threaded sleeve 820 and fix it by screwing in the set screw 903 through the set screw hole. Connect the handle 819 to the threaded hole of the handle connecting threaded sleeve 820 with screws.

[0076] like Figure 31 As shown, the composite end door 7 adopts a thin-walled sandwich structure integrally formed by mold, and has a square groove and a handle groove 701 (dumbbell-shaped recessed groove); the upper groove is the valve assembly interface; the dumbbell-shaped recessed groove is used for limiting and fixing the handle after it is retracted; the middle through hole is used for the connection and fit of the rotating handle fixing sleeve. The circumferential sealant is used to seal the handle groove to ensure that water will not seep into the interior along the round hole; the lower groove is the accessory box interface; the composite end door 7 and the end door frame assembly 6 are fixed by adhesive and screw connection.

[0077] The device of this invention uses the end door frame assembly 6 as the base, and then sequentially assembles and fixes the frame plate 5, the rotating handle fixing sleeve 801, the oil seal 902, the sealing bearing 901, and the spindle 401. After these are assembled and fixed, the other components of the linkage device assembly 4 are installed. After the installed components are fixed by the frame back plate 3, the hinge assembly 1 and the composite end door 7 are further installed and connected and fixed. Then, the rotating handle assembly 8 is further installed with all other components except the rotating handle fixing sleeve 801. The function of the linkage device assembly 4 is then tested. After the test is completed, the other end of the hinge of the assembly is connected to the inner wall of the packaging box, and the door frame assembly 2 is connected for further testing of the locking structure and the opening and closing operation.

[0078] The device of this invention can quickly open and close the end door. Its structure can be used on various end-opening packaging boxes. This structure can also be applied to other fields that require quick opening and closing of doors, such as fireproof and explosion-proof doors, coal mine escape doors, etc.

[0079] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A linkage rotation locking end door device, comprising: Box door frame assembly (2), frame back plate (3), connecting rod assembly (4), frame front plate (5), end door frame assembly (6); The characteristic is that the door frame assembly (2) is installed on the ring rib of the box body, and the inner periphery of the frame of the door frame assembly (2) is provided with a groove (202) for the lock tongue (407) to extend into. The inner side of the end door frame assembly (6) is provided with a lock groove (601) corresponding to the position of the groove (202), and a lock tongue (407) is movably installed in the lock groove (601). The skeleton back plate (3) and the skeleton front plate (5) are assembled to the inner side of the end door frame assembly (6) by screws (904) and spacers (905); The linkage assembly (4) is mounted between the frame back plate (3) and the frame front plate (5); the linkage assembly (4) drives the locking tongue (407) to enter or leave the groove (202). It also includes a hinge assembly (1), a composite end door (7), and a rotating handle assembly (8). The end door seat plate (101) of the hinge assembly (1) is connected to the end door frame assembly (6) after passing through the frame back plate (3) and the frame front plate (5) with screws (904). The box seat plate (102) of the hinge assembly (1) is connected to the box with screws (904). The composite end door (7) is installed on the outside of the end door frame assembly (6); The rotary handle assembly (8) drives the linkage assembly (4) to move; The connecting rod assembly (4) includes a spindle (401), a crank (402), a lever rotator (403), a double-ended stud connector (404), a straight connecting rod (405), a connecting rod (406), and a locking tongue (407); the spindle (401) has a core plate (408) at its rear, and the spindle (401) is mounted on the back plate (3) and the front plate (5) of the frame respectively on both sides of the core plate (408) via mounting bearings (901); The core disk (408) is fitted with an outer disk (410) and an inner disk (411) on both sides. Multiple cranks (402) are fitted between the outer disk (410) and the inner disk (411) along the circumferential direction. One end of the crank (402) is hinged to the corresponding mounting through holes on the outer disk (410) and the inner disk (411) through the disk shaft (412). The other end of the crank (402) is hinged to the force-saving end of the lever rotating component (403). Multiple lever rotating parts (403) are respectively movably assembled at corresponding positions between the skeleton back plate (3) and the skeleton front plate (5); the force-reducing end of the lever rotating part (403) is hinged to the ring end of the double-ended stud connector (404), the rod end of the double-ended stud connector (404) is connected to one end of the straight connecting rod (405) through a double-ended stud (430), the other end of the straight connecting rod (405) is hinged to the end head of the connecting rod (406), the rod part of the connecting rod (406) passes through the through hole channel (413) of the locking tongue (407) and its end is threaded with a nut (414), a compression spring I (415) is installed on the rod part of the connecting rod (406), the compression spring I (415) causes the nut (414) to engage with the through hole channel (413) under normal conditions; each lever rotating part (403) drives multiple locking tongues (407) to move synchronously; The rotating handle assembly (8) includes a rotating handle fixing sleeve (801). The inner end face of the rotating handle fixing sleeve (801) is provided with a positioning ring sleeve (802), and the outer surface of the inner end of the rotating handle fixing sleeve (801) is provided with an outer positioning ring protrusion (803). The inner end of the rotating handle fixing sleeve (801) passes through the through hole of the end door frame assembly (6) and is positioned by the outer positioning ring protrusion (803). The positioning ring sleeve (802) is inserted into the through hole of the frame plate (5). The inner end face of the rotating handle fixing sleeve (801) is fixed to the frame plate (5) by screws. Fixed connection; the inner end face of the rotating handle fixing sleeve (801) is provided with stepped cavity I (804) and stepped cavity II (805) in sequence. The bearing (901) is installed in the stepped cavity I (804) and the oil seal (902) is installed in the stepped cavity II (805); the core rod (409) of the spindle (401) passes into the inner cavity of the rotating handle fixing sleeve (801). The core rod (409) is provided with two sliding grooves (421) symmetrically along the axial direction. The front part of the two sliding grooves (421) is provided with limiting groove I (423) and the rear part is provided with limiting groove II (424). The inner cavity of the rotating handle fixing sleeve (801) is equipped with a pull-out hollow sleeve (810). The inner rear part of the inner cavity of the pull-out hollow sleeve (810) is provided with an inner ring protrusion (811). The rear end of the inner cavity of the pull-out hollow sleeve (810) is provided with two rectangular grooves (812) symmetrically arranged along the axial direction. The rectangular grooves (812) are fitted with a locking pin (813) for mounting a locking block (814). The blind hole (815) of the locking block (814) is fitted with a compression spring II (816) so that the locking block (814) is located in the sliding groove (421) of the core rod (409) under normal conditions. The stroke of the locking block (814) is located between the limiting groove I (423) and the limiting groove II (424). The rear end of the pull-out hollow sleeve (810) is fitted with a cap by screws.

2. The linkage rotation locking end door device according to claim 1, characterized in that: The lever rotating component (403) rotates around the rotating fixed sleeve (416); the flange (417) of the rotating fixed sleeve (416) is fixedly connected to the frame plate (5) by screws; the sleeve end face (418) of the rotating fixed sleeve (416) is fixedly connected to the frame back plate (3) by screws after being positioned by the inner positioning ring protrusion (420) and the through hole; the rotating sleeve (422) is fixedly installed at the through hole of the lever rotating component (403); the rotating sleeve (422) is assembled on the sleeve surface (419) of the rotating fixed sleeve (416).

3. The linkage rotation locking end door device according to claim 1, characterized in that: The inner cavity of the pull-out hollow sleeve (810) is located in front of the inner annular protrusion (811) where a POM sleeve (425) and a nylon sleeve (426) are installed in sequence. The POM sleeve (425) is positioned by a set screw. The end face of the core rod (409) is fitted with a plug (427) by a screw. When the locking block (814) is located in the limiting groove I (423), the POM sleeve (425), the nylon sleeve (426) and the plug (427) abut against each other. A stainless steel sleeve (806) is fixedly installed in the inner cavity of the rotating handle fixing sleeve (801), and the pull-out hollow sleeve (810) slides in cooperation with the stainless steel sleeve (806); the inner cavity port of the rotating handle fixing sleeve (801) is provided with an inner circular groove (807), and a retaining ring (808) for fixing the stainless steel sleeve (806) is installed in the inner circular groove (807).

4. The linkage rotation locking end door device according to claim 3, characterized in that: The front of the pull-out hollow sleeve (810) is provided with a threaded section (817) and a smooth section (818). The threaded section (817) at the front of the pull-out hollow sleeve (810) is connected to the threaded sleeve (820) via a threaded handle. The outer truncated cone (821) of the handle-connected threaded sleeve (820) is connected to the handle (819) by a screw. The outer truncated cone (821) is positioned by installing a set screw (903) in the set screw hole (822) along the circumference of the set screw hole. The smooth section (818) at the front of the handle-connected threaded sleeve (820) is inserted into the center hole of the handle (819) to achieve positioning.

5. The linkage rotation locking end door device according to claim 4, characterized in that: The composite end door (7) is provided with a handle groove (701) for placing a handle (819) in the middle.

6. The linkage rotation locking end door device according to claim 5, characterized in that: The number of cranks (402) is four, each corresponding to a lever rotating part (403); each lever rotating part (403) drives three locking tongues (407) to move, that is, 12 locking grooves (601) are arranged around the end door frame assembly (6).

7. The linkage rotation locking end door device according to claim 1, characterized in that: The disc shaft (412) is integrally formed by a central cylinder (428) and two cylindrical platforms (429) on both sides; the central cylinder (428) of the disc shaft (412) is fitted into the mounting through hole at one end of the crank (402), and the cylindrical platforms (429) on both sides of the disc shaft (412) are respectively fitted into the mounting through holes of the outer disc (410) and the inner disc (411).

Images