Connecting rod rotating locking end door device

Abstract

The invention discloses a connecting rod rotating locking end door device which comprises a box door frame assembly (2), a framework back plate (3), a connecting rod device assembly (4), a framework front plate (5) and an end door frame assembly (6). The box door frame assembly (2) is installed on a box body annular rib, and a groove (202) for the spring bolt (407) to stretch in is formed in the inner periphery of a frame body of the box door frame assembly (2). A lock groove (601) corresponding to the groove (202) in position is formed in the periphery of the inner side face of the end door frame assembly (6), and a lock tongue (407) is movably installed in the lock groove (601). The framework back plate (3) and the framework front plate (5) are assembled on the inner side face of the end door frame assembly (6) through screws (904) and spacer bushes (905). The connecting rod device assembly (4) is assembled between the framework back plate (3) and the framework front plate (5); the connecting rod device assembly (4) drives the spring bolt (407) to enter or leave the groove (202). The method has good practical application value.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging box end door design, and in particular relates to a connecting rod rotating and locking end door device. Background Art

[0002] The sealed packaging box with end-door structure is usually composed of a box body, an end door and a carrier. As an important sealing device, the end door plays a key role in the airtightness of the box body. The common sealed packaging box end door adopts circumferentially uniform buckles to fix the seal and circumferentially multiple bolts to fix the seal.

[0003] The buckle-fixed sealing structure often easily causes damage to the lock at the bottom edge of the box end door, affecting the performance of the equipment; the bolt-fixed sealing structure is prone to thread stripping and failure. These two types of fixed sealing structures not only have a high failure rate in the use of active equipment, but also have problems such as inconvenient operation and long operation time during use.

[0004] With the continuous improvement of equipment support efficiency requirements, the traditional end door fixed sealing structure can no longer meet the requirements of future rapid service management. Therefore, a quick opening and closing sealed packaging box is needed to meet the requirements of rapid service management. Summary of the invention

[0005] The purpose of the present invention is to design a connecting rod rotating locking end door device to realize the function of rapid rotation opening and closing of the end door of the packaging box, thereby increasing the door opening and closing speed and meeting the requirements of rapid service management.

[0006] The present invention is achieved by adopting the following technical solutions: A connecting rod rotating and locking end door device comprises: a hinge assembly, a door frame assembly, a frame back plate, a connecting rod assembly, a frame front plate, an end door frame assembly, a composite end door, and a rotating handle assembly.

[0007] The box door frame assembly is installed on the box body ring rib, and a groove for the lock tongue to extend into is arranged on the inner periphery of the frame of the box door frame assembly; a lock groove corresponding to the position of the groove is arranged on the outer periphery of the inner side surface of the end door frame assembly, and a lock tongue is movably installed in the lock groove; the frame back plate and the frame front plate are assembled on the inner side surface of the end door frame assembly by screws and spacers; the connecting rod device assembly is assembled between the frame back plate and the frame front plate; the connecting rod device assembly drives the lock tongue 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 the frame front plate by screws, and the box body seat plate of the hinge assembly is connected to the box body by screws; the composite end door is installed on the outer side of the end door frame assembly; the rotating handle assembly drives the connecting rod device assembly to move.

[0008] Further preferably, the connecting rod device assembly includes a core shaft, a crank, a lever rotating member, a double-headed stud connecting joint, a straight connecting rod, a connecting rod, and a locking tongue; a core disk is provided at the rear of the core shaft, and the core shaft is located on both sides of the core disk and is respectively installed on the skeleton back plate and the skeleton front plate through assembly bearings; an outer disk and an inner disk are installed opposite to each other on both sides of the core disk, and a plurality of cranks are installed between the outer disk and the inner disk along the circumferential direction; one end of the crank is hingedly assembled in the corresponding mounting through holes on the outer disk and the inner disk through a disk rotating shaft, and the other end of the crank is hinged to the labor-saving end of the lever rotating member; A plurality of lever rotating parts are movably assembled at corresponding positions between the skeleton back plate and the skeleton front plate; the labored end of the lever rotating part is hinged to the ring end of the stud connecting joint, the rod end of the stud connecting joint is connected to one end of the straight connecting rod through a stud, the other end of the straight connecting rod is hinged to the end head of the connecting rod, the rod portion of the connecting rod passes through the through-hole channel of the locking tongue and the end portion thereof is threadedly connected to the nut, a compression spring I is passed through the rod portion of the connecting rod, and the compression spring I enables the nut to engage with the through-hole channel under normal conditions; each lever rotating part drives a plurality of locking tongues to move synchronously.

[0009] Further preferably, the lever rotating member rotates around the rotating fixed sleeve; the flange of the rotating fixed sleeve is fixedly connected to the front plate of the skeleton by screws, the end face of the sleeve body of the rotating fixed sleeve is positioned with the through hole of the skeleton back plate by an internal positioning ring convex and then fixedly connected by screws, the rotating sleeve is fixedly installed at the through hole of the lever rotating member, and the rotating sleeve is fitted on the sleeve body surface of the rotating fixed sleeve.

[0010] Further preferably, the rotating handle assembly includes a rotating handle fixing sleeve, the inner end face of the rotating handle fixing sleeve is provided with a positioning ring sleeve, and the inner end outer surface of the rotating handle fixing sleeve is provided with an outer positioning ring convex; the inner end of the rotating handle fixing sleeve passes through the through hole of the end door frame assembly and is positioned by the outer positioning ring convex, and the positioning ring sleeve cooperates and extends into the through hole of the skeleton front plate, and the inner end face of the rotating handle fixing sleeve is fixedly connected to the skeleton front plate by screws; the inner end face of the rotating handle fixing sleeve is provided with step cavity I and step cavity II in sequence, a bearing is installed in the step cavity I, and an oil seal is installed in the step cavity II; the core rod of the core shaft penetrates into the rotating handle The inner cavity of the handle fixing sleeve, the core rod is axially symmetrically provided with two sliding grooves, the front part of the two sliding grooves is correspondingly provided with a limit groove I, and the rear part is correspondingly provided with a limit 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 convex, and the rear end of the inner cavity of the pull-out hollow sleeve is axially symmetrically provided with two rectangular grooves, and a clamping block is installed in the rectangular groove through a clamping block fixing pin, and a compression spring II is installed in the blind hole of the clamping block so that the clamping block is normally located in the sliding groove of the core rod, and the stroke of the clamping block is located between the limit groove I and the limit groove II; a cover is installed at the rear end of the pull-out hollow sleeve through screws.

[0011] Further preferably, the inner cavity of the pull-out type hollow sleeve is located in front of the inner ring convex, and a POM sleeve and a nylon sleeve are installed in sequence; the POM sleeve is positioned by a set screw, and a plug cover is installed on the end face of the core rod by a screw, and when the block is located in the limit groove I, the POM sleeve, the nylon sleeve and the plug cover abut against each other; a stainless steel sleeve is fixedly installed on the inner cavity of the rotating handle fixing sleeve, and the pull-out type hollow sleeve slides with the stainless steel sleeve; an inner cavity port of the rotating handle fixing sleeve is provided with an inner circular groove, and a retaining ring for fixing the stainless steel sleeve is installed in the inner circular groove.

[0012] Further preferably, the front part of the pull-out hollow sleeve is provided with a threaded section and a smooth section, the front threaded section of the pull-out hollow sleeve is connected to the threaded sleeve through a threaded mounting handle, the outer cylindrical cone of the handle connected to the threaded sleeve is connected to the handle through a screw; the outer cylindrical cone is installed along the circumference through a top screw hole to realize the positioning of the handle connected to the threaded sleeve; the front smooth section of the handle connected to the threaded sleeve is inserted into the central circular hole of the handle to realize positioning and matching.

[0013] Further preferably, a handle groove for placing a handle is provided in the middle of the composite end door.

[0014] Further preferably, the number of the cranks is four, corresponding to four lever rotating members respectively; each lever rotating member drives three locking tongues to move, that is, 12 lock grooves are correspondingly arranged around the end door frame assembly.

[0015] Further preferably, the disc shaft is integrally composed of a middle cylinder and cylindrical platforms on both sides; the middle cylinder of the disc shaft is assembled in the mounting through hole at one end of the crank, and the cylindrical platforms on both sides of the disc shaft are respectively assembled in the mounting through holes of the outer disc and the inner disc.

[0016] When working, the handle is pulled out, and the pull-out hollow sleeve is driven by the handle connected to the threaded sleeve. The pull-out hollow sleeve slides outward along the stainless steel sleeve, and the block moves from the limit groove II to the limit groove I. The two blocks are always located in the two slide grooves of the core shaft. After the handle is stretched to the right position, the handle is rotated, and the core disk is driven to rotate through the pull-out hollow sleeve and the core rod in turn. After the crank drives the lever rotating part to rotate, the straight connecting rod and the connecting rod are driven to shrink, and then the lock tongue is driven to move back in the lock groove. After leaving the groove of the box door frame assembly, the end door is opened. Conversely, after the end door is closed, the handle is rotated in the opposite direction to drive the lock tongue to move in and out of the lock groove. After entering the groove of the box door frame assembly, the end door is closed. Finally, the handle is pushed back to its original position, that is, the pull-out hollow sleeve slides between the rotating handle fixed sleeve and the core rod, and the block moves from the limit groove I to the limit groove II, so that the handle is retracted into the handle groove of the composite end door.

[0017] The connecting rod rotating locking end door device structure described in the present invention specifically relates to the mechanical mechanism of the connecting rod device assembly and the rotating handle assembly structure. The handle assembly can be pulled out for easy operation when twisting; the shape design of the crank plate assembly and the rotating plate assembly in the connecting rod device assembly is to occupy a smaller space when the mechanism moves, while ensuring that the transmission part has sufficient rigidity to transmit torque. The structural design and layout also saves space, increases the rotational torque, improves the rigidity of the component, and reduces the design weight.

[0018] The invention has reasonable design and good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 The present invention is shown in a split schematic diagram.

[0022] Figure 2 It is a schematic diagram showing the connection between the frame front plate, frame back plate and hinge assembly.

[0023] Figure 3 An enlarged schematic diagram of the end door base plate showing the hinge assembly.

[0024] Figure 4 Schematic diagram showing the cooperation between the groove and the lock tongue in the door frame assembly.

[0025] Figure 5 A schematic diagram of the lock block structure is shown.

[0026] Figure 6 A schematic diagram of the skeleton backplane structure is shown.

[0027] Figure 7 It is a schematic diagram showing the structure of the skeleton front plate.

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

[0029] Fig. 9 Schematic diagram of the mandrel structure Figure 2 Fig.10 Schematic diagram of the inner disc structure.

[0030] Fig.11 It is a schematic diagram showing the assembly of the inner disc and the core shaft.

[0031] Fig.12 It is a schematic diagram showing the assembly of the outer disc and the core shaft.

[0032] Fig.13 It is a schematic diagram showing the structure of the disc shaft.

[0033] Fig.14 A schematic diagram of the crank assembly is shown.

[0034] Fig.15 A schematic diagram showing the structure of the connecting rod device assembly.

[0035] Fig.16 It is a schematic diagram showing the structure of the rotating sleeve.

[0036] Fig.17 It is a schematic diagram showing the structure of the rotating fixed sleeve.

[0037] Fig.18 It is a schematic diagram showing the structure of a double-head screw connector.

[0038] Fig.19 It is a schematic diagram of the straight connecting rod structure.

[0039] Fig. 20 Schematic diagram of the connecting rod structure.

[0040] Fig.21 A schematic diagram of a nut structure is shown.

[0041] Fig. 22 A schematic diagram showing the connection between the connecting rod and the lock tongue.

[0042] Fig.23 A schematic diagram showing an end door frame assembly.

[0043] Fig.24 A schematic diagram of a lock slot is shown.

[0044] Fig.25 Represents the assembly diagram of the rotary handle assembly.

[0045] Fig.26 It is a schematic diagram showing the structure of the rotating handle fixing sleeve.

[0046] Fig. 27 It is a schematic diagram of the structure of a pull-out hollow sleeve.

[0047] Fig.28 A schematic diagram of the card block structure is shown.

[0048] Fig.29 It is a schematic diagram showing the structure of the handle connected to the threaded sleeve.

[0049] Fig.30It is a schematic diagram showing the connection between the handle connecting threaded sleeve and the handle.

[0050] Fig.31 Schematic diagram of composite end door.

[0051] In the figure: 1-hinge assembly, 101-end door seat plate, 102-box seat plate; 2-box door frame assembly, 201-lock block, 202-groove; 3-skeleton back plate; 4-connecting rod assembly, 401-core shaft, 402-crank, 403-lever rotating member, 404-stud screw connection joint, 405-straight connecting rod, 406-connecting rod, 407-lock tongue, 408-core disk, 409-core rod, 410-outer disk, 411-inner disc, 412-disc shaft, 413-through hole channel, 414-nut, 415-compression spring I, 416-rotation fixing sleeve, 417-flange, 418-sleeve end face, 419-sleeve surface, 420-inner positioning ring convex, 421-slide groove, 422-rotation sleeve, 423-limiting groove I, 424-limiting groove II, 425-POM sleeve, 426-nylon sleeve, 427-blocking cover, 428 - middle cylinder, 429- cylindrical platform, 430- stud, 431- pin; 5- skeleton plate; 6- end door frame assembly, 601- lock slot; 7- composite end door, 701- handle slot; 8- rotating handle assembly, 801- rotating handle fixing sleeve, 802- positioning ring sleeve, 803- positioning ring convex, 804- step cavity Ⅰ, 805- step cavity Ⅱ, 806- stainless steel sleeve, 807- inner circle sink, 808- stop Ring, 810-pull-out hollow sleeve, 811-inner ring convex, 812-rectangular groove, 813-block fixing pin, 814-block, 815-blind hole, 816-compression spring II, 817-threaded section, 818-smooth section, 819-handle, 820-handle connecting threaded sleeve, 821-outer cylindrical table, 822-top screw hole; 901-bearing, 902-oil seal, 903-top screw, 904-screw, 905-spacer.

[0052] Note: The directions defined in the present invention are as follows, based on Figure 25, the right side is the front and the left side is the back. DETAILED DESCRIPTION

[0053] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0054] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, 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 internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0055] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0056] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

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

[0058] A circle of countersunk through holes around the door frame assembly 2 is installed on the box body ring rib by screws, and multiple locking blocks 201 are installed on the inner periphery of the frame of the door frame assembly 2 by screws, such as Figure 4 , Figure 5 As shown, the locking block 201 is provided with a groove 202 , that is, the inner periphery of the frame of the door frame assembly 2 is arranged with a groove 202 for the locking tongue 407 to extend into.

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

[0060] like Figure 2 As shown, the end door seat plate 101 of the three hinge assemblies 1 is connected to the end door frame assembly 6 after passing through the frame back plate 3 and the frame front plate 5 by screws 904, and the box seat plate 102 of the hinge assembly 1 is connected to the box by screws 904. The hinge assembly 1 is a "Z"-shaped structure, which belongs to the existing structure, see the patent disclosure document (CN116923885A, name: an inner buckle turning hinge mechanism). The hinge assembly 1 is mainly used to facilitate the rotation and opening and closing of the end door.

[0061] like Figure 5 , Figure 6As shown, the structure of the frame back plate 3 is similar to that of the frame front plate 5. The frame back plate 3 and the frame front plate 5 are designed as sheet metal structural parts with comprehensive rigidity and light weight factors, and are mainly used to support and fix the connecting rod assembly 4. The frame back plate 3 and the frame front plate 5 are assembled on the inner side of the end door frame assembly 6 through screws 904 and spacers 905. The distance between the frame back plate 3 and the frame front plate 5 is the thickness of the spacers 905. The connecting rod assembly 4 is assembled between the frame back plate 3 and the frame front plate 5; the rotating handle assembly 8 drives the connecting rod assembly 4 to move, and the connecting rod assembly 4 drives the lock tongue 407 to enter or leave the groove 202. The composite end door 7 is installed on the outer side of the end door frame assembly 6.

[0062] The connecting rod assembly 4 is the core movement mechanism of the whole device, and mainly includes a spindle 401, a crank 402, a lever rotating member 403, a stud connection joint 404, a straight connecting rod 405, a connecting rod 406, a locking tongue 407, etc.

[0063] like Figure 8 , Fig. 9 As shown, the core shaft 401 is "T" shaped, a core disc 408 is provided at the rear of the core shaft 401, two slide grooves 421 are symmetrically provided along the axial direction on the core rod 409, and the front of the two slide grooves 421 are correspondingly provided with a limit groove I 423 and the rear is correspondingly provided with a limit groove II 424.

[0064] like Fig.10 , Fig.12 As shown, the outer disc 410 and the inner disc 411 are mounted on both sides of the core disc 408. Fig.11 As shown, four cranks 402 are installed between the outer disc 410 and the inner disc 411 along the circumferential direction, forming an "S" shape, which is a sheet part. Fig.14 As shown, one end of the crank 402 is hingedly assembled in the corresponding mounting holes on the outer disc 410 and the inner disc 411 through the disc rotating shaft 412. Fig.13 As shown, the disc shaft 412 is integrally composed of a middle cylinder 428 and cylindrical platforms 429 on both sides; the middle cylinder 428 of the disc shaft 412 is assembled in the mounting hole at one end of the crank 402, and the cylindrical platforms 429 on both sides of the disc shaft 412 are respectively assembled in the mounting holes of the outer disc 410 and the inner disc 411.

[0065] Each lever rotating member 403 can be composed of two sheet parts (fastened into a whole by screws), four groups in total, and the parts are a "knife handle" type structure.

[0066] like Fig.15 As shown, the other end of the crank 402 is hinged to the labor-saving end of the lever rotating member 403, and the hinged manner is the same as the disc shaft structure. The four lever rotating members 403 are respectively assembled at corresponding positions between the frame back plate 3 and the frame front plate 5 by means of rotation. The lever rotating member 403 rotates around the rotating fixed sleeve 416; Fig.17As shown, the flange 417 of the rotating fixed sleeve 416 is fixedly connected to the frame front plate 5 by screws, and the sleeve 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 member 403, as shown in FIG. Fig.16 As shown, the rotating sleeve 422 is assembled on the sleeve body surface 419 of the rotating fixed sleeve 416. Figures 18 to 22 As shown, the labor end of the lever rotating member 403 is hinged with the ring end of the stud connection joint 404, the rod end of the stud connection joint 404 is connected to one end of the straight connecting rod 405 through the stud 430, and the other end of the straight connecting rod 405 is hinged with the end head of the connecting rod 406. After the rod portion of the connecting rod 406 passes through the through-hole channel 413 of the lock tongue 407, its end is threadedly connected to the nut 414. A compression spring I 415 is passed through the rod portion of the connecting rod 406. The compression spring I 415 makes the nut 414 engage with the through-hole channel 413 under normal conditions. The compression spring I 415 is mainly used for preload compensation. When vibrating or moving, it ensures that the thrust of each lock tongue is uniform through compression deformation. Each lever rotating member 403 drives three lock tongues 407 to move synchronously.

[0067] like Fig.23 As shown, the end door frame assembly 6 mainly includes a main panel and a ring rib. The front of the end door frame assembly has a tic-tac-toe vertical rib for weight reduction design and enhanced panel rigidity. The back of the end door frame assembly 6 is correspondingly arranged with 12 lock grooves 601. Fig.24 As shown, it is used for sliding guide of the lock tongue 407. The middle circular hole of the end door frame assembly 6 cooperates with the rotating handle assembly 8, and the side edge is a plane for pressing the sealing strip after the end door is closed.

[0068] like Fig.25 As shown, the core shaft 401 is located on both sides of the core disc 408 and is installed on the frame back plate 3 and the frame front plate 5 respectively through the assembly bearings 901.

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

[0070] like Fig.25 , Fig.26As shown, the inner end face of the rotating handle fixing sleeve 801 is provided with a positioning ring sleeve 802, and the inner end outer surface 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, and the positioning ring sleeve 802 cooperates to extend into the through hole of the framework front plate 5, and the inner end face of the rotating handle fixing sleeve 801 is fixedly connected to the framework front plate 5 by screws. The inner end face of the rotating handle fixing sleeve 801 is provided with a step cavity I 804 and a step cavity II 805 in sequence, and a bearing 901 is installed in the step cavity I 804, and an oil seal 902 is installed in the step cavity II 805; the core rod 409 of the core shaft 401 penetrates 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 Fig.25 , Fig. 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 entry and exit; the inner cavity rear portion of the pull-out hollow sleeve 810 is provided with an inner ring convex 811, and the inner cavity rear end of the pull-out hollow sleeve 810 is symmetrically provided with two rectangular grooves 812 along the axial direction, and a clamping block 814 is installed in the rectangular groove 812 through a clamping block fixing pin 813, as shown in FIG. Fig.28 As shown, a compression spring II 816 is installed in the blind hole 815 of the block 814 so that the block 814 is located in the slide groove 421 of the core rod 409 under normal conditions. The rectangular groove is mainly used for the block and the compression spring assembly II and the block can only rotate along the axis of the hole through the hole and the block fixing pin. The stroke of the block 814 is located between the limit groove I 423 and the limit groove II 424; the rear end of the pull-out hollow sleeve 810 is installed with a cover by screws to ensure that the block and the compression spring II assembly will not fall off.

[0072] like Fig.25 As shown, the inner cavity of the pull-out hollow sleeve 810 is located in front of the inner ring convex 811, and the POM sleeve 425 and the nylon sleeve 426 are installed in sequence. The inner ring convex is mainly used to limit the position of the POM sleeve and to restrict the movement of the POM sleeve by screwing the set screw into the threaded hole, that is, the POM sleeve 425 is positioned by the set screw (top screw). The end face of the core rod 409 is installed with a plug cover 427 by screws. When the clamping block 814 is located in the limiting groove I 423, the POM sleeve 425, the nylon sleeve 426 and the plug cover 427 are abutted. The pull-out hollow sleeve cooperates with the stainless steel sleeve, so that the pull-out hollow steel sleeve can be pulled smoothly.

[0073] like Fig.25 , Fig.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 is slidably matched with the stainless steel sleeve 806; an 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 as a retaining ring for the hole and further limits the movement of the stainless steel sleeve so that it has only rotational function.

[0074] like Fig.25 , Fig. 27 As shown, the front of the pull-out hollow sleeve 810 is provided with a threaded section 817 and a smooth section 818 (both of which are stepped), and the threaded section 817 at the front of the pull-out hollow sleeve 810 is connected to the threaded sleeve 820 through a threaded mounting handle, as shown in FIG. Fig.29 As shown, the outer truncated cone 821 of the handle connecting threaded sleeve 820 is connected to the handle 819 by screws; the outer truncated cone 821 is installed with a top screw 903 in the top screw hole 822 along the circumference to realize the positioning of the handle connecting threaded sleeve 820; the front smooth section 818 of the handle connecting threaded sleeve 820 is inserted into the central circular hole of the handle 819 to realize the positioning and matching, as shown in FIG. Fig.30 shown.

[0075] During installation, the block 814, compression spring II 816, and block fixing pin 813 are connected to the pull-out hollow sleeve 810, and the POM sleeve 425, nylon sleeve 426, and POM set screw are installed, and the sleeve is slid along the slide groove 421 of the mandrel 401, and the screw is connected to the threaded hole fixed on the mandrel 401 through the two holes of the mandrel plug cover 427, and then the rotating handle fixing sleeve 801, stainless steel sleeve 806, and hole retaining ring 808 are installed, and the rotating handle fixing sleeve 801 is connected to the skeleton positive plate 5 by screws. Then the handle connecting threaded sleeve 820 is installed and the top screw 903 is screwed in through the top screw hole to fix it, and the handle 819 is connected to the threaded hole of the handle connecting threaded sleeve 820 by screws.

[0076] like Fig.31 As shown, the composite end door 7 adopts a thin-walled sandwich structure formed by an integral mold, and has a square groove and a handle groove 701 (dumbbell-shaped groove); the upper groove is the valve table component interface; the dumbbell-shaped groove is used for limiting and fixing the handle after it is retracted; the middle through hole is used for the connection and matching of the rotating handle fixing sleeve. The circumferential sealing is carried out through the sealant to ensure that water in the handle groove will not penetrate into the interior along the circular hole; the lower groove is the document box interface; the composite end door 7 and the end door frame assembly 6 are fixed by gluing and screwing.

[0077] The device of the present invention takes the end door frame assembly 6 as the base, and assembles the skeleton front plate 5, the rotating handle fixing sleeve 801, the oil seal 902, the sealing bearing 901, and the core shaft 401 in sequence and fixes them. Then, other components of the connecting rod device assembly 4 are installed. After the installed components are fixed by the skeleton back plate 3, the hinge assembly 1 and the composite end door 7 are further assembled and connected and fixed. After that, other components except the rotating handle fixing sleeve 801 in the rotating handle assembly 8 are further installed, and then the function of the connecting rod device assembly 4 is debugged. After the debugging is completed, the other end of the hinge of the assembly is connected to the inner wall of the packaging box, and the box door frame assembly 2 is connected to further debug the locking structure and the door opening and closing operation.

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

[0079] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A connecting rod rotating 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 invention is characterized in that: the door frame assembly (2) is mounted on the ring rib of the box body, and a groove (202) for the locking tongue (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 surface of the end door frame assembly (6), and a lock tongue (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 means of screws (904) and spacers (905); The connecting rod assembly (4) is assembled between the frame back plate (3) and the frame front plate (5); the connecting rod assembly (4) drives the locking tongue (407) to enter or leave the groove (202).

2. A connecting rod rotating locking end door device according to claim 1, characterized in that: 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) by means of screws (904) passing through the frame back plate (3) and the frame front plate (5), and the box body seat plate (102) of the hinge assembly (1) is connected to the box body by means of screws (904); The composite end door (7) is installed on the outside of the end door frame assembly (6); The rotating handle assembly (8) drives the connecting rod assembly (4) to move.

3. A connecting rod rotating locking end door device according to claim 2, characterized in that: The connecting rod assembly (4) comprises a core shaft (401), a crank (402), a lever rotating member (403), a stud connecting joint (404), a straight connecting rod (405), a connecting rod (406), and a locking tongue (407); a core disk (408) is provided at the rear of the core shaft (401); the core shaft (401) is mounted on both sides of the core disk (408) on the frame back plate (3) and the frame front plate (5) through mounting bearings (901); An outer disc (410) and an inner disc (411) are mounted opposite to each other on both sides of the core disc (408); a plurality of cranks (402) are mounted between the outer disc (410) and the inner disc (411) along a circumferential direction; one end of the crank (402) is hingedly mounted in corresponding mounting through holes on the outer disc (410) and the inner disc (411) via a disc rotating shaft (412); the other end of the crank (402) is hingedly mounted to a labor-saving end of a lever rotating member (403); A plurality of lever rotating members (403) are movably assembled at corresponding positions between the skeleton back plate (3) and the skeleton front plate (5); the labored end of the lever rotating member (403) is hinged to the ring end of the stud connection joint (404); the rod end of the stud connection joint (404) is connected to one end of a straight connecting rod (405) via a stud (430); the other end of the straight connecting rod (405) is hinged to the end portion of a connecting rod (406); the rod portion of the connecting rod (406) passes through a through-hole channel (413) of a lock tongue (407) and the end portion thereof is threadedly connected to a nut (414); a compression spring I (415) is passed through the rod portion of the connecting rod (406); the compression spring I (415) enables the nut (414) to engage with the through-hole channel (413) under normal conditions; each lever rotating member (403) drives a plurality of lock tongues (407) to move synchronously.

4. A connecting rod rotating locking end door device according to claim 3, characterized in that: The lever rotating member (403) rotates around the rotating fixed sleeve (416); the flange (417) of the rotating fixed sleeve (416) is fixedly connected to the frame front plate (5) by means of screws; the sleeve body end surface (418) of the rotating fixed sleeve (416) is positioned with the through hole of the frame back plate (3) by means of an inner positioning ring protrusion (420) and then fixedly connected by means of screws; a rotating sleeve (422) is fixedly installed at the through hole of the lever rotating member (403); and the rotating sleeve (422) is assembled on the sleeve body surface (419) of the rotating fixed sleeve (416).

5. A connecting rod rotating locking end door device according to claim 4, characterized in that: The rotating handle assembly (8) comprises a rotating handle fixing sleeve (801), the inner end surface of the rotating handle fixing sleeve (801) is provided with a positioning ring sleeve (802), and the inner end outer surface 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), and the positioning ring sleeve (802) cooperates to extend into the through hole of the frame front plate (5), and the inner end surface of the rotating handle fixing sleeve (801) is fixed to the frame front plate (5) by screws. The inner end surface of the rotating handle fixing sleeve (801) is provided with a step cavity I (804) and a step cavity II (805) in sequence, a bearing (901) is installed in the step cavity I (804), and an oil seal (902) is installed in the step cavity II (805); the core rod (409) of the core shaft (401) penetrates into the inner cavity of the rotating handle fixing sleeve (801), and two slide grooves (421) are symmetrically provided along the axial direction on the core rod (409), and the two slide grooves (421) are correspondingly provided with a limit groove I (423) at the front and a limit groove II (424) at the rear; The inner cavity of the rotating handle fixing sleeve (801) is equipped with a pull-out hollow sleeve (810), the rear part of the inner cavity of the pull-out hollow sleeve (810) is provided with an inner ring convexity (811), and the rear end of the inner cavity of the pull-out hollow sleeve (810) is symmetrically provided with two rectangular grooves (812) along the axial direction, and a clamping block (814) is installed in the rectangular groove (812) through a clamping block fixing pin (813), and a compression spring II (816) is installed in the blind hole (815) of the clamping block (814) so ​​that the clamping block (814) is located in the sliding groove (421) of the core rod (409) under normal conditions, and the stroke of the clamping 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 installed with a cover by screws.

6. A connecting rod rotating locking end door device according to claim 5, characterized in that: The inner cavity of the pull-out hollow sleeve (810) is located in front of the inner ring convexity (811), and a POM sleeve (425) and a nylon sleeve (426) are installed in sequence. The POM sleeve (425) is positioned by a set screw, and a plug cover (427) is installed on the end face of the core rod (409) by a screw. When the clamping block (814) is located in the limiting groove I (423), the POM sleeve (425), the nylon sleeve (426) and the plug cover (427) are abutted 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) is slidably matched with the stainless steel sleeve (806); an inner circular recessed groove (807) is provided at the inner cavity port of the rotating handle fixing sleeve (801), and a retaining ring (808) for fixing the stainless steel sleeve (806) is installed in the inner circular recessed groove (807).

7. A connecting rod rotating locking end door device according to claim 6, characterized in that: The front portion of the pull-out type hollow sleeve (810) is provided with a threaded section (817) and a smooth section (818); the threaded section (817) at the front portion of the pull-out type hollow sleeve (810) is threadedly mounted on a handle-connected threaded sleeve (820); an outer truncated cone (821) of the handle-connected threaded sleeve (820) is connected to the handle (819) via a screw; a top screw (903) is installed in a top screw hole (822) along the circumference of the outer truncated cone (821) to achieve positioning of the handle-connected threaded sleeve (820); and the smooth section (818) at the front portion of the handle-connected threaded sleeve (820) is inserted into the central circular hole of the handle (819) to achieve positioning and matching.

8. A connecting rod rotating locking end door device according to claim 7, characterized in that: A handle groove (701) for placing a handle (819) is provided in the middle of the composite material end door (7).

9. A connecting rod rotating locking end door device according to claim 8, characterized in that: There are four cranks (402), which correspond to four lever rotating members (403) respectively; each lever rotating member (403) drives three locking tongues (407) to move, that is, 12 locking grooves (601) are arranged correspondingly around the end door frame assembly (6).

10. The connecting rod rotating and locking end door device according to claim 3, characterized in that: The disc rotating shaft (412) is integrally composed of a middle cylinder (428) and cylindrical platforms (429) on both sides; the middle cylinder (428) of the disc rotating shaft (412) is assembled in a mounting through hole at one end of the crank (402), and the cylindrical platforms (429) on both sides of the disc rotating shaft (412) are respectively assembled in the mounting through holes of the outer disc (410) and the inner disc (411).

Images