Double-layer metal cage with space expansion structure

Abstract

The invention discloses a double-layer metal cage with a space expansion structure. The double-layer metal cage comprises a first metal cage, a second metal cage, an expansion device and an auxiliary expansion device, the expansion device is arranged, that is, when the first metal cage and the second metal cage are in a stacked double-layer state, a worm and a worm gear can be rotated by rotating a rocking handle, so that the worm gear synchronously rotates a rotary table, connecting lugs arranged on the two sides of the rotary table are matched with connecting arms on the two sides to outwards push moving frames on the two sides, and therefore the two metal cages can be expanded. When the first metal cage and the second metal cage are used separately, the first metal cage can still carry out space expansion through the expansion device, and the second metal cage needs to carry out auxiliary space expansion and locking through the arrangement of the auxiliary expansion device arranged at the upper end of the first metal cage, so that the synchronous space expansion activity of the first metal cage and the second metal cage is achieved. Therefore, the first metal cage and the second metal cage can meet the space expansion of a double-layer metal cage and can also meet the space expansion of a single metal cage.

Description

Technical Field

[0001] The invention relates to the technical field of metal cages, in particular to a double-layer metal cage with a space expansion structure. Background Art

[0002] Environmentally friendly metal cages are being used more and more nowadays. They are made of metal as a whole and have good toughness. Nowadays, metal cages are widely used in the transportation of objects or the storage of animals, and are more convenient to use.

[0003] The existing application number is CN202123087751.6, which is an environmentally friendly metal cage with a retractable adjustable structure, including a lower frame, lower sleeves are installed around the top of the lower frame, and lower grids are installed at the middle position around the top of the lower frame, rubber pads are installed around the bottom of the lower frame, and an upper frame is arranged above the lower frame, upper sleeves are installed around the bottom of the upper frame, and upper grids are installed at the middle position around the bottom of the upper frame, and reinforcement structures are arranged at the middle position of both ends inside the upper frame.

[0004] Although the above-mentioned existing patent can well realize the upward and downward telescopic adjustment activities of the metal cage, when it constitutes a double-layer metal cage structure, its upward and downward telescopic adjustment activities need to be performed multiple times, which makes the space expansion adjustment inconvenient. At the same time, the current general double-layer metal cage is generally directly welded and fixed. When it is necessary to separate the upper and lower layers, it is affected by the overall structure, which makes its combination and disassembly inconvenient. Summary of the invention

[0005] The object of the present invention is to provide a double-layer metal cage with a space expansion structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a double-layer metal cage with a spatial expansion structure, comprising a first metal cage, a second metal cage, an expansion device and an auxiliary expansion device, the upper end of the first metal cage is provided with a second metal cage, and the first metal cage and the second metal cage have the same structure, the lower end of the first metal cage is installed with an expansion device, and the upper end of the second metal cage is provided with an auxiliary expansion device, the first metal cage comprises a telescopic bottom plate placed at the bottom, an intermediate column arranged on both sides of the middle of the telescopic bottom plate, a telescopic rod inserted on both sides of the intermediate column, a side frame docked to the side of the telescopic rod and connected to the side of the telescopic bottom plate, a docking rod installed between the side frames on one side, an opening and closing door installed in the middle of the side frames on the other side, a telescopic top plate docked to the upper ends of the side frames on both sides, and docking recesses opened at the four corners of the telescopic top plate, and the docking recesses are connected to the bottom of the second metal cage.

[0007] Preferably, the expansion device includes a shell, a worm, a crank, a worm wheel, a turntable, a connecting ear, a connecting arm, a movable frame and a docking block. The shell is installed at the lower end of the first metal cage, the middle part of the shell is rotatably connected to a worm, one side of the worm is docked with a crank, one side of the middle part of the worm is meshingly connected to a worm wheel, the bottom of the worm wheel is docked with a turntable, and the turntable is rotatably connected to the bottom of the shell, connecting ears are fixed on both sides of the outer end of the turntable, the outer side of the connecting ear is rotatably connected to a connecting arm, one side of the connecting arm is connected to the movable frame, docking blocks are fixed on both sides of the top of the movable frame, and the docking blocks are connected to the bottom of the first metal cage.

[0008] Preferably, the auxiliary expansion device includes a fixed plate, a plug-in plate, a connecting shell, a slot, a locking structure and a connecting slot; the fixed plate is mounted on the upper end of the second metal cage; plug-in plates are provided on both sides of the fixed plate; a connecting shell is sleeved on the outer side of the plug-in plate; a slot is provided on the upper end of the connecting shell; a locking structure is installed in the middle of the fixed plate; a connecting slot is provided in the middle of the plug-in plate; and the locking structure is connected to the slot and the connecting slot.

[0009] Preferably, the locking structure includes a push rod, a cross bar, a clamping shaft, a connecting rod, a spring and a locking piece. The push rod is inserted into the fixed plate, the rear end of the push rod is connected to the cross bar, the upper ends of both sides of the cross bar are equipped with clamping shafts, connecting rods are fastened inside both sides of the cross bar, and the rear side of the connecting rod is connected to the spring, and the front side of the push rod is docked with a locking piece.

[0010] Preferably, the locking member includes a fixed frame, a side groove, a docking block, a pull shaft, a bottom block, a rotating shaft, a locking rod and a connecting ring. The fixed frame is fastened to the front side of the fixed plate, and side grooves are provided on both sides of the fixed frame. The docking block is installed on the front side of the push rod, and the front side of the docking block is connected to the pull shaft. The bottom of the docking block is fixedly connected to the bottom of the docking block, and rotating shafts are provided on both sides of the bottom block. The rotating shaft is connected to the inside of the locking rod, and the outer side of the locking rod is threadedly connected to a connecting ring.

[0011] Preferably, the connecting arms are installed at least two places along the interior of the shell, and the connecting arms on both sides are arranged in an inverted V-shaped strip.

[0012] Preferably, the movable frame and the docking blocks on both sides of the top form a concave frame shape, and the docking blocks on both sides penetrate the upper end of the shell.

[0013] Preferably, the plug board, the connection shell and the card slot are all arranged symmetrically along the fixed plate, and the card slot is composed of a rectangular recess and a transverse groove connected to each other.

[0014] Preferably, the push rod and the cross bar form a T-shaped rod, and both sides of the cross bar are laterally inserted into the connecting groove.

[0015] Preferably, the side grooves are opened in the shape of rectangular grooves along the left and right sides of the fixing frame, and the length of the side grooves is shorter than the length of the locking rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with an expansion device, that is, when the first metal cage and the second metal cage are in a stacked double-layer state, the rotation of the worm can be achieved by turning the crank, and as the worm rotates, the transmission worm wheel is driven to make the worm wheel synchronously rotate the turntable, so that the connecting ears arranged on both sides of the turntable will cooperate with the connecting arms on both sides to push the moving frames on both sides, thereby indirectly realizing the synchronous spatial expansion activities of the first metal cage and the second metal cage, and when the first metal cage and the second metal cage are separated and used alone, the first metal cage can still be spatially expanded by the expansion device, while the second metal cage needs to be assisted in spatial expansion and locking by the setting of the auxiliary expansion device arranged at the upper end, so that the first metal cage and the second metal cage can meet the spatial expansion of the double-layer metal cage and the spatial expansion of the single metal cage.

[0017] The setting of the expansion device, that is, the meshing transmission of the worm and the worm wheel can be realized by turning the crank, so that the worm wheel can synchronously realize the rotation of the turntable. As the turntable rotates, the connecting ears installed on both sides of the outer end of the turntable can follow the rotation trajectory to realize the pushing of the connecting arm connected to the outside. In this way, the movable frame docked on the outside of the connecting arm will move laterally, so that the first metal cage connected to the docking blocks on both sides of the upper end of the movable frame can achieve two-way adjustment of space expansion through the cooperation of the internal structure to meet the rapid adjustment of the internal space, and the second metal cage that is unlocked can be synchronously adjusted and expanded with the expansion and adjustment of the space of the first metal cage, which greatly improves the convenience of the expansion and adjustment of the space of the double-layer metal cage without too many cumbersome steps.

[0018] The auxiliary expansion device is set up, that is, when the second metal cage is transported and used alone, the cross bar can be moved backward by pushing the push rod backward, so that the card shafts on both sides of the upper end of the cross bar can be moved out of the rectangular recess inside the card slot to move into the transverse groove. In this way, the lock of the card shaft and the card slot can be quickly released. At the same time, the locking rods arranged on both sides of the bottom block at the lower end of the docking block will be opposite to the side grooves opened on both sides of the fixed frame. After the locking activity is realized through the connecting ring, the card shaft can be stably located in the transverse groove inside the card slot, so that the second metal cage can realize convenient space expansion activities through the telescopic cooperation of its own structure and the plug-in board and the connecting shell. When the lock of the locking piece is released, the spring docked at the rear side of the connecting rod and in a compressed state will automatically push the cross bar back, so that the card shafts on both sides of the upper end of the cross bar are automatically stuck in the rectangular recess inside the card slot, so as to ensure that the adjusted second metal cage can be in a stable space expansion state and avoid the occurrence of loose problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the expanded structure of the metal cage of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the first metal cage of the present invention; Figure 4 It is a schematic diagram of the contraction structure of the expansion device of the present invention from a top view; Figure 5 It is a schematic diagram of the expanded structure of the expansion device of the present invention from a top view; Figure 6 It is a schematic diagram of the three-dimensional contraction structure of the second metal cage of the present invention; Figure 7 It is a schematic diagram of the three-dimensional unfolded structure of the second metal cage of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the auxiliary expansion device of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional unfolding structure of the auxiliary expansion device of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the auxiliary expansion device of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the locking member of the present invention; Fig.12 For the present invention Fig.11 Enlarged structural diagram at A in the middle.

[0020] In the figure: first metal cage-1, telescopic bottom plate-11, middle column-12, telescopic rod-13, side frame-14, docking rod-15, opening and closing door-16, telescopic top plate-17, docking notch-18, second metal cage-2, expansion device-3, shell-31, worm-32, crank-33, worm wheel-34, turntable-35, connecting ear-36, connecting arm-37, mobile frame-38, docking block-39, auxiliary expansion device-4, fixed Fixed plate -41, plug-in plate -42, connecting shell -43, card slot -44, locking structure -45, push rod -451, cross bar -452, card shaft -453, connecting rod -454, spring -455, locking piece -456, fixed frame -4561, side groove -4562, docking block -4563, pull shaft -4564, bottom block -4565, rotating shaft -4566, locking rod -4567, connecting ring -4568, connecting groove -46. DETAILED DESCRIPTION

[0021] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0022] See also Figure 1-3The present invention provides a double-layer metal cage with a spatial expansion structure, including a first metal cage 1, a second metal cage 2, an expansion device 3 and an auxiliary expansion device 4. The second metal cage 2 is provided at the upper end of the first metal cage 1, and the structures of the first metal cage 1 and the second metal cage 2 are consistent. The expansion device 3 is installed at the lower end of the first metal cage 1, and the auxiliary expansion device 4 is provided at the upper end of the second metal cage 2.

[0023] The first metal cage 1 includes a telescopic bottom plate 11 placed at the bottom and capable of being extended and retracted laterally to both sides, an intermediate column 12 symmetrically and vertically connected to the front and rear sides of the middle of the telescopic bottom plate 11, a telescopic rod 13 equidistantly and laterally plugged into the left and right sides of the intermediate column 12 for lateral expansion and adjustment, a side frame 14 connected to the side of the telescopic rod 13 and connected to the left and right sides of the telescopic bottom plate 11, a docking rod 15 equidistantly installed between the left side side frames 14, an opening and closing door 16 installed in the middle of the right side frame 14, and a docking rod 15 connected to the upper ends of the side frames 14 on both sides. The telescopic top plate 17 is provided, and the telescopic trajectory of the telescopic top plate 17 is consistent with the telescopic bottom plate 11. Correspondingly, docking recesses 18 are provided at the four corners of the upper end of the telescopic top plate 17. The docking recesses 18 are connected to the bottom of the second metal cage 2, and the four-side docking recesses 18 are connected to the four corner bolts at the bottom of the second metal cage 2. In this way, the second metal cage 2 and the first metal cage 1 can be flexibly stacked and combined to form a double-layer metal cage structure. At the same time, the second metal cage 2 and the first metal cage 1 can also be flexibly split to meet the use requirements of a single metal cage.

[0024] Specifically, when the first metal cage 1 and the second metal cage 2 are stacked up and down, that is, forming a double-layer metal cage structure, the opening and closing door 16 provided on the right side frame 14 can be opened to place objects or animals inside the first metal cage 1 and the second metal cage 2 for stable transportation.

[0025] See also Figure 4-5The expansion device 3 in this embodiment includes a housing 31, a worm 32, a crank 33, a worm wheel 34, a turntable 35, a connecting ear 36, a connecting arm 37, a movable frame 38 and a docking block 39. The housing 31 is installed at the lower end of the first metal cage 1 to achieve stable support and matching. The middle part of the housing 31 is rotatably connected to the worm 32, and the lower end of the worm 32 is docked with a crank 33. The worm 32 can be manually rotated by the crank 33 to perform flexible expansion and adjustment activities. The right side of the middle part of the worm 32 is meshed and connected with a worm wheel 34, and the bottom of the worm wheel 34 is docked with a turntable 3 5, and the turntable 35 is rotatably connected to the bottom of the shell 31, so that the worm gear 34 can realize the synchronous rotation of the turntable 35 to meet the expansion transmission adjustment activity, the outer ends of the turntable 35 are fixed with connecting ears 36 with the same structure on both sides, and the outer sides of the connecting ears 36 on both sides are rotatably connected with connecting arms 37, and the overall structure of the connecting arms 37 is consistent, and the ends of the connecting arms 37 on both sides away from the connecting ears 36 are connected to the inside of the moving frame 38, and the upper and lower sides of the moving frame 38 are fixed with docking blocks 39, and the docking blocks 39 on both sides are connected to the bottom of the first metal cage 1.

[0026] Among them, the connecting arms 37 are installed at least two places along the inside of the shell 31, and the connecting arms 37 on both sides are arranged in an inverted V-shaped strip, so as to ensure that the pushing and pulling distance of the connecting arms 37 on both sides is longer to meet the space expansion activities of larger sizes; the moving frame 38 and the docking blocks 39 on both sides of the top form a concave frame shape, and the docking blocks 39 on both sides pass through the upper end of the shell 31, so that when the moving frame 38 is driven to move along both sides of the inside of the shell 31, it can cooperate with the docking effect of the docking blocks 39 on both sides and the bottom of the first metal cage 1 to achieve efficient adjustment of the space expansion activities.

[0027] Specifically, when the first metal cage 1 and the second metal cage 2 are in a double-layer metal cage structure and are to perform space expansion and adjustment activities, the locking structure 45 provided inside the auxiliary expansion device 4 can be unlocked in advance, that is, the locking of the card shaft 453 and the card slot 44 can be unlocked. In this way, the crank handle 33 connected to one side of the worm 32 can be manually rotated to make the worm 32 rotate synchronously and engage the worm wheel 34 connected to the right side of the middle part of the transmission. In this way, the turntable 35 connected to the bottom of the worm wheel 34 will rotate counterclockwise synchronously, and as the turntable 35 rotates counterclockwise, the connecting ears 36 connected to the two sides of the outer end of the turntable 35 will realize the push of the corresponding rotation of the outer end through the counterclockwise rotation effect. As a result, the movable frame 38 connected to the outer side of the connecting arms 37 on both sides will be moved from Figure 4 The contraction state in is adjusted to Figure 5In the unfolded state, during the adjustment process, the moving frames 38 on both sides will synchronously move laterally in opposite directions, and cooperate with the docking blocks 39 provided on both sides of the top to realize the pulling of the telescopic bottom plate 11 connected to the upper end, so that the telescopic bottom plate 11 can be unfolded on both sides. As the two sides of the telescopic bottom plate 11 are unfolded at the same time, the telescopic rod 13 provided between the middle column 12 and the side frame 14 and the telescopic top plate 17 installed on the top of the side frames 14 on both sides can make the first metal cage 1 unfold in both directions as a whole, so as to realize flexible adjustment and expansion of the internal space. At the same time, when the first metal cage 1 is performing space expansion activities, the second metal cage 2 in the unlocked state will cooperate with the internal structure to synchronously perform space expansion activities to meet the synchronous lateral expansion adjustment of the first metal cage 1 and the second metal cage 2. In this way, the convenience of space expansion of the double-layer metal cage can be improved without too many cumbersome steps, which greatly improves the usability of the double-layer metal cage and reduces the problem of poor space expansion capacity of the double-layer metal cage.

[0028] See also Figure 6-12 The auxiliary expansion device 4 in this embodiment includes a fixing plate 41, a plug-in plate 42, a connecting shell 43, a slot 44, a locking structure 45 and a connecting slot 46. The fixing plate 41 is longitudinally installed in the middle of the upper end of the second metal cage 2. The left and right sides of the fixing plate 41 are fastened with the plug-in plates 42. The outer ends of the plug-in plates 42 on both sides are sleeved with the connecting shell 43. In this way, the connecting shell 43 can form a telescopic state with the relative plug-in plate 42 to meet the subsequent space expansion of the second metal cage 2. The upper end of the connecting shell 43 is provided with There is a card slot 44. Through the setting of the card slot 44, flexible locking cooperation can be carried out, so that when the second metal cage 2 and the first metal cage 1 are stacked and combined to expand synchronously, corresponding unlocking is carried out, and when the second metal cage 2 is used alone for space expansion adjustment, auxiliary adjustment locking cooperation is achieved. A locking structure 45 is installed in the middle of the fixed plate 41, and a connecting groove 46 is horizontally opened in the middle of the plug-in plate 42, so that the locking structure 45 has a certain activity space, and the locking structure 45 is connected to the card slot 44 and the connecting groove 46.

[0029] Among them, the locking structure 45 includes a push rod 451, a cross bar 452, a clamping shaft 453, a connecting rod 454, a spring 455 and a locking piece 456. The push rod 451 is longitudinally inserted into the fixed plate 41, and the rear end of the push rod 451 is tightly connected to the cross bar 452. The upper ends of the left and right sides of the cross bar 452 are equipped with clamping shafts 453, and the clamping shafts 453 on both sides extend into the inside of the card grooves 44 on both sides. Connecting rods 454 are fastened to the inside of both sides of the cross bar 452, and the connecting rods 454 on both sides are installed in pairs, and the connecting rods 454 on both sides are longitudinally movably inserted into the inside of the connecting grooves 46. The rear side of the connecting rod 454 is connected to the spring 455, and the spring 455 is built into the plug-in board 42 to provide rebound locking assistance. The front side of the push rod 451 is docked with a locking piece 456.

[0030] The locking member 456 includes a fixed frame 4561, a side groove 4562, a docking block 4563, a pull shaft 4564, a bottom block 4565, a rotating shaft 4566, a locking rod 4567 and a connecting ring 4568. The fixed frame 4561 is fastened to the front side of the fixed plate 41, and the middle part of the fixed frame 4561 is plugged with the push rod 451. The left and right sides of the fixed frame 4561 are provided with side grooves 4562 for unlocking and locking. The docking block 4563 is installed on the front side of the push rod 451. The front side of the docking block 4563 is connected with a pull shaft 4564 for pushing and pulling. A bottom block 4565 is fixedly connected to the bottom of 4563, and the length of the bottom block 4565 is longer than that of the docking block 4563, and recesses are integrally formed on the left and right sides of the bottom block 4565, and rotating shafts 4566 are installed inside the recesses on the left and right sides of the bottom block 4565, and the rotating shaft 4566 is connected to the inside of the locking rod 4567, so that the locking rod 4567 can be flipped upward through the cooperation of the rotating shaft 4566, and the locking rod 4567 can be moved into the side groove 4562 for locking cooperation, and the outer side of the locking rod 4567 is threadedly docked with a connecting ring 4568.

[0031] Among them, the plug-in board 42, the connecting shell 43 and the card slot 44 are all symmetrically arranged along the left and right sides of the fixed plate 41, and the card slot 44 is composed of a rectangular recess and a transverse groove, which is connected to ensure that the card slot 44 can be connected with the card shaft 453 through the rectangular recess to form a locked state, and when the card shaft 453 moves into the transverse groove, the locked state is quickly released; the push rod 451 and the cross bar 452 are composed of a T-shaped rod, and the two sides of the cross bar 452 are respectively inserted into the connecting groove 46 laterally, ensuring that the cross bar 452 has a certain activity space inside the connecting groove 46 to meet flexible locking activities; the side grooves 4562 are opened in the shape of rectangular grooves on the left and right sides of the fixed frame 4561, and the length of the side grooves 4562 is shorter than the length of the locking rod 4567, ensuring that after the locking rod 4567 moves into the side grooves 4562, the connecting ring 4568 threadedly connected to the outside of the locking rod 4567 has a moving and rotating space for locking cooperation.

[0032] Specifically, after releasing the bolt docking effect of the docking notches 18 provided at the four corners of the bottom of the second metal cage 2 and the four corners of the top of the telescopic top plate 17, the second metal cage 2 can be easily removed from the upper end of the first metal cage 1, so that the double-layer metal cage structure is converted into a single-layer metal cage structure, and the first metal cage 1 can still realize flexible space expansion and adjustment activities through the expansion device 3 docked at the bottom. When the space expansion activity of the second metal cage 2 is required, it is necessary to push back the push rod 451 docked at the middle of the fixed plate 41, so that the push rod 451 can realize the synchronous backward push of the rear end connected to the cross bar 452, so that the two sides of the cross bar 452 can be opened along the middle of the upper end of the plug-in plate 42 on both sides. When the cross bar 452 moves backward, the card shafts 453 on both sides of the upper end will be synchronously moved backward, so that the card shafts 453 on both sides will be synchronously moved out of the rectangular recesses inside the card grooves 44 on both sides to unlock the card shafts 453 and the card grooves 44. At the same time, when the cross bar 452 moves backward, the connecting rods 454 on both sides will be synchronously moved backward, so that the connecting rods 454 on both sides will be squeezed by the springs 455 connected at the rear ends to ensure that when the locking member 456 is subsequently released, the rebound effect of the springs 455 at various locations can automatically realize the automatic locking of the card shaft 453 and the rectangular recesses inside the card groove 44, thereby improving the convenience of locking. When the locking shaft 453 is pushed back to unlock, the docking block 4563 docked at the front side of the push rod 451 will be moved from Figure 8 The structural state in is converted to Fig. 9The structural state in the middle, that is, the docking block 4563 will be inserted into the fixed frame 4561, and the bottom block 4565 set at the bottom of the docking block 4563 will overlap with the bottom of the fixed frame 4561. At this time, the locking rods 4567 installed on both sides of the bottom block 4565 will be opposite to the side grooves 4562 opened on both sides of the fixed frame 4561. Then, the locking rods 4567 on both sides are flipped up, and after the locking rods 4567 on both sides are pushed into the inside of the side grooves 4562 on both sides, the connecting rings 4568 with threaded connection at the outer ends of the locking rods 4567 on both sides can be rotated respectively to make the connection The ring 4568 rotates and moves downward to abut against the upper openings of the side grooves 4562 on both sides, thereby locking the docking block 4563 and the fixed frame 4561, and ensuring the stability of the unlocked state of the card shaft 453, so that the springs 455 at various locations cannot rebound temporarily, thereby pulling the side frames 14 on both sides to achieve the stretching of the telescopic bottom plate 11, the telescopic rod 13 and the telescopic top plate 17, so that the second metal cage 2 used alone can perform space expansion and adjustment activities, and when the second metal cage 2 performs space expansion and adjustment activities, the fixed plate 4 The plug-in boards 42 arranged on the left and right sides will cooperate with the correspondingly sleeved connection shells 43 on the outside to achieve synchronous expansion, thereby ensuring the stability of the space expansion process of the second metal cage 2. At the same time, the card shaft 453 moved into the inner transverse groove of the card slot 44 will change the relative position of the rectangular recess with the movement of the connection shell 43, thereby ensuring that after the space expansion activity of the second metal cage 2 is completed, the lock rod 4567 and the side groove 4562 can be unlocked by rotating the connection ring 4568 outward and the lock rods 4567 on both sides can be flipped down, so that the lock rods 4567 on both sides can be moved out of the two corresponding positions. After being inserted into the side groove 4562, the locking effect of the locking piece 456 can be quickly released, so that the spring 455 on both sides of the rear end of the cross bar 452 which is in a compressed state will rebound to push the connecting rod 454, the cross bar 452 and the push rod 451, so that the card shaft 453 installed on both sides of the upper end of the cross bar 452 will automatically be inserted into a new rectangular recess inside the card groove 44 on both sides for card locking. After the second metal cage 2 completes the space expansion adjustment activity, it can achieve self-locking cooperation, thereby ensuring the stability of the overall structure after the space expansion and avoiding the occurrence of looseness.

[0033] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-layer metal cage with a space expansion structure, characterized in that: The invention comprises a first metal cage (1), a second metal cage (2), an expansion device (3) and an auxiliary expansion device (4); the second metal cage (2) is arranged at the upper end of the first metal cage (1); the first metal cage (1) and the second metal cage (2) have the same structure; the expansion device (3) is installed at the lower end of the first metal cage (1); the auxiliary expansion device (4) is arranged at the upper end of the second metal cage (2); the first metal cage (1) comprises a telescopic bottom plate (11) disposed at the bottom, intermediate columns (12) arranged at both sides of the middle of the telescopic bottom plate (11), and a plurality of intermediate columns (13) arranged at the upper end of the telescopic bottom plate (11). ), a telescopic rod (13) inserted into both sides of the middle column (12), a side frame (14) connected to the side of the telescopic rod (13) and connected to the side of the telescopic bottom plate (11), a docking rod (15) installed between the side frames (14) on one side, an opening and closing door (16) installed in the middle of the side frame (14) on the other side, a telescopic top plate (17) connected to the upper ends of the side frames (14) on both sides, and docking recesses (18) opened at the four corners of the telescopic top plate (17), wherein the docking recesses (18) are connected to the bottom of the second metal cage (2).

2. According to claim 1, a double-layer metal cage with a space expansion structure is characterized in that: The expansion device (3) comprises a housing (31), a worm (32), a crank (33), a worm wheel (34), a turntable (35), a connecting ear (36), a connecting arm (37), a movable frame (38) and a docking block (39); the housing (31) is mounted on the lower end of the first metal cage (1); a worm (32) is rotatably connected to the middle of the housing (31); a crank (33) is docked on one side of the worm (32); and a worm wheel (34) is meshedly connected to one side of the middle of the worm (32). 4), a rotating disk (35) is butted against the bottom of the worm wheel (34), and the rotating disk (35) is rotatably connected to the bottom of the housing (31), connecting ears (36) are fixedly provided on both sides of the outer end of the rotating disk (35), and a connecting arm (37) is rotatably connected to the outer side of the connecting ear (36), and one side of the connecting arm (37) is connected to a moving frame (38), and docking blocks (39) are fixedly provided on both sides of the top of the moving frame (38), and the docking blocks (39) are connected to the bottom of the first metal cage (1).

3. According to claim 1, a double-layer metal cage with a space expansion structure is characterized in that: The auxiliary expansion device (4) comprises a fixing plate (41), a plug-in plate (42), a connection shell (43), a slot (44), a locking structure (45) and a connection slot (46); the fixing plate (41) is mounted on the upper end of the second metal cage (2); plug-in plates (42) are provided on both sides of the fixing plate (41); the connection shell (43) is sleeved on the outer side of the plug-in plate (42); the slot (44) is provided at the upper end of the connection shell (43); the locking structure (45) is installed in the middle of the fixing plate (41); the connection slot (46) is provided in the middle of the plug-in plate (42); and the locking structure (45) is connected to the slot (44) and the connection slot (46).

4. The double-layer metal cage with a space expansion structure according to claim 3, characterized in that: The locking structure (45) comprises a push rod (451), a cross bar (452), a clamping shaft (453), a connecting rod (454), a spring (455) and a locking piece (456); the push rod (451) is inserted into the interior of the fixed plate (41); the rear end of the push rod (451) is connected to the cross bar (452); the clamping shaft (453) is installed at the upper ends of both sides of the cross bar (452); the connecting rods (454) are fastened inside both sides of the cross bar (452); the rear side of the connecting rod (454) is connected to the spring (455); and the front side of the push rod (451) is butted with a locking piece (456).

5. A double-layer metal cage with a space expansion structure according to claim 4, characterized in that: The locking member (456) comprises a fixing frame (4561), a side groove (4562), a docking block (4563), a pulling shaft (4564), a bottom block (4565), a rotating shaft (4566), a locking rod (4567) and a connecting ring (4568). The fixing frame (4561) is fastened to the front side of the fixing plate (41). Side grooves (4562) are provided on both sides of the fixing frame (4561). The docking block (4563) is installed on the front side of the push rod (451). The front side of the docking block (4563) is connected to the pulling shaft (4564). The bottom of the docking block (4563) is fixedly connected to the bottom block (4565). The two sides of the bottom block (4565) are equipped with rotating shafts (4566). The rotating shaft (4566) is connected to the inside of the locking rod (4567). The outer side of the locking rod (4567) is threadedly docked with a connecting ring (4568).

6. The double-layer metal cage with a space expansion structure according to claim 2, characterized in that: The connecting arms (37) are installed at least two locations along the interior of the shell (31), and the connecting arms (37) on both sides are arranged in an inverted V-shaped strip shape.

7. The double-layer metal cage with a space expansion structure according to claim 2, characterized in that: The movable frame (38) and the docking blocks (39) on both sides of the top form a concave frame shape, and the docking blocks (39) on both sides penetrate the upper end of the shell (31).

8. The double-layer metal cage with a space expansion structure according to claim 3, characterized in that: The plug board (42), the connection shell (43) and the card slot (44) are all symmetrically arranged along the fixed plate (41), and the card slot (44) is composed of a rectangular notch and a transverse groove in communication.

9. The double-layer metal cage with a space expansion structure according to claim 4, characterized in that: The push rod (451) and the cross rod (452) together form a T-shaped rod, and both sides of the cross rod (452) are respectively inserted into the connection groove (46) transversely.

10. The double-layer metal cage with a space expansion structure according to claim 5, characterized in that: The side grooves (4562) are opened in the shape of rectangular grooves along the left and right sides of the fixing frame (4561), and the length of the side grooves (4562) is shorter than the length of the locking rod (4567).

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