Foldable universal mechanical structure for supporting foundation pit supporting channel steel plate

Abstract

The invention belongs to the technical field of universal mechanical mechanisms, and particularly relates to a foldable universal mechanical structure for supporting a foundation pit supporting channel steel plate. The device comprises a first connecting arm connected to one side steel enclosing purlin in a foundation pit, the other end of the first connecting arm is rotationally connected with a rotating unit, the other end of the rotating unit is rotationally connected with a universal unit, the universal unit is connected to one middle steel enclosing purlin, and the other end of the universal unit is rotationally connected with a second connecting arm; the other end of the second connecting arm is connected to the other side steel enclosing purlin; the rotating unit is connected with a connecting plate, a lifting mechanism is installed on the connecting plate, the output end of the lifting mechanism is connected with a supporting unit, and the other end of the supporting unit is connected with a locking mechanism used for locking the second connecting arm. According to the foldable universal mechanical structure used for supporting the foundation pit supporting channel steel plate, parts can be fixed at the proper gravity center position in the folded state, and mutual collision between the parts is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation excavation support devices, and in particular relates to a foldable universal mechanical structure for supporting a foundation pit support groove steel plate. Background Art

[0002] After the foundation pit is excavated, the foundation pit support channel steel plate is needed to stably support the side wall of the foundation pit. The foundation pit support channel steel plate includes two side steel purlins and two middle steel purlins. In order to ensure the stability of the foundation pit support channel steel plate, the two side steel purlins and the two middle steel purlins need to be connected with fixed rigid hinges. Since the two side steel purlins and the two middle steel purlins may not be able to adapt to the dislocation installation of steel purlins or complex foundation pit shapes such as tilted and asymmetric layouts, the support adjustment flexibility is insufficient and cannot cope with the on-site construction environment. Therefore, it is necessary to use a universal mechanism structure to adaptively articulate the neutral plane of the side steel purlins and the middle steel purlins so as not to be affected by the uneven force or eccentric support of the dislocation installation of adjacent steel purlins. The universal mechanical mechanism used to support the foundation pit support channel steel plate can be flexibly rotated in different directions, so as to deform and provide effective support as needed.

[0003] In the prior art, the mechanical structure used for foundation pit support is usually connected by a simple purely fixed hinge structure and locked by a manual latch. The combined support structure is bulky and cannot be folded. It cannot be transported as a whole and reliably locked in a folded state. It takes up a huge amount of space and requires additional protective measures. During transportation, if it is not fixed and locked, different parts of the flexibly rotating universal mechanical mechanism will collide with each other, causing deformation or damage. Even if the universal mechanical mechanism is folded, the external force impact and vibration caused by different road conditions will still cause the mounting arm in the universal mechanical mechanism to collide with other parts, accelerating fatigue damage to the universal mechanical mechanism. This not only increases transportation risks and costs, but may also affect the normal use of the equipment. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a foldable universal mechanical structure for supporting the steel plate of the foundation pit support trough, which can be firmly locked at a suitable center of gravity position of the structure in the folded transportation state to avoid mutual collision between structures during transportation.

[0005] The technical solution adopted by the present invention is: A foldable universal mechanical structure for supporting a steel plate of a foundation pit support groove, comprising a first connecting arm connected to one of the side steel purlins in the foundation pit, the other end of the first connecting arm is rotatably connected to a rotating unit, the other end of the rotating unit is rotatably connected to a universal unit, the middle part of the universal unit is connected to one of the middle steel purlins in the foundation pit, the other end of the universal unit is rotatably connected to a second connecting arm, the other end of the second connecting arm is connected to another side steel purlin in the foundation pit; the rotating unit is connected to a connecting plate, a lifting mechanism is installed on the connecting plate, the output end of the lifting mechanism is connected to a supporting unit, and the other end of the supporting unit is connected to a locking mechanism for locking the second connecting arm.

[0006] When in use, the first connecting arm of the present invention is connected to one of the side steel purlins in the foundation pit, the universal unit is connected to one of the middle steel purlins, and the second connecting arm is connected to the other side steel purlin. Through the rotation of the universal units at both ends and the rotation of the universal units relative to the first connecting arm or the second connecting arm, the foldable universal mechanical structure of this embodiment can connect two irregularly arranged steel purlins. The present invention achieves stable support for the steel plates of the foundation pit support groove, increases the resistance to lateral pressure, reduces the deformation or collapse risks of the steel purlin structure, increases the number of times the structure can be reused, and thus ensures construction safety. The present invention is suitable for foundation pit support groove steel plates in different conditions, and is easy to disassemble and reuse, thereby reducing construction difficulty and improving equipment use efficiency.

[0007] During long-distance loading, unloading and transportation, the rotating connections at both ends of the universal unit are folded 90 degrees, so that the first connecting arm and the second connecting arm rotate to the same direction. The overall length of the structure of the present invention is greatly reduced, the space occupied by the device is greatly reduced, and loading, unloading and transportation are convenient.

[0008] After the foldable universal mechanical structure for supporting the foundation pit support groove steel plate of the present invention is folded, the overall axial length is shortened and the transportation volume is reduced. The second connecting arm is firmly locked by the locking mechanism on the supporting unit, so that the first connecting arm and the second connecting arm form a relatively rigid fixed connection, avoiding the second connecting arm from colliding with the corresponding parts of the first connecting arm due to bumps during transportation in the folded state, thereby ensuring the anti-bumping ability of the present invention during transportation and extending the safe service life of the present invention to a certain extent.

[0009] The end mounting arm of the second connecting arm of the present invention can be installed with an integrated control device such as electric, hydraulic, and gas to adapt to more efficient, accurate, safe, and reliable engineering support application scenarios. During the folding and transportation of the device, the lifting mechanism of the present invention can drive the support unit and the locking mechanism to rise and fall. When the second connecting arm is installed with control devices of different weights, the height of the locking mechanism is adjusted so that the locking mechanism is limited and fixed at different positions of the second connecting arm, thereby enabling the device to adapt to the change in the center of gravity of the second connecting arm when installing control devices of different masses, ensuring that the locking mechanism can always firmly limit and fix the second connecting arm when installing and configuring control devices of different masses.

[0010] As a preferred embodiment of the present invention, the lifting mechanism includes a lifting motor, which is mounted on a connecting plate, an output end of the lifting motor is connected to an adjusting screw, an adjusting slot is provided on the connecting plate, a lifting block is sleeved in the adjusting slot, the lifting block is threadedly connected to the adjusting screw, and the support unit is fixed to the lifting block. The lifting motor drives the adjusting screw to rotate, and the adjusting slot limits the rotational freedom of the lifting block, so that the lifting block is lifted and lowered under the drive of the adjusting screw. The lifting block drives the support unit to lift and lower, thereby adjusting the height of the locking mechanism.

[0011] As a preferred solution of the present invention, a sleeve plate is also fixed on the lifting block, and the sleeve plate is sleeved on the first connecting arm. The first connecting arm limits and supports the sleeve plate, so that the other end of the sleeve plate can support the supporting unit through the lifting block, thereby preventing the lower end of the connecting plate from being deformed when the locking mechanism is subjected to excessive squeezing force from the second connecting arm.

[0012] As a preferred embodiment of the present invention, the locking mechanism includes a locking motor, which is mounted on the support unit, and the output end of the locking motor is connected to a driving gear; the locking mechanism also includes a semi-circular body with at least one end open, which is fixed on the support unit, and an arc-shaped limiting plate is sleeved inside the semi-circular body, and an arc-shaped gear ring is arranged on the arc-shaped limiting plate, and the arc-shaped gear ring forms a full-tooth surface meshing transmission with the driving gear, and the arc-shaped limiting plate locks the second connecting arm after being extended. The locking motor drives the driving gear to rotate, and the driving gear drives the arc-shaped gear ring to rotate, so that the arc-shaped limiting plate extends out of the semi-circular body along with the arc-shaped gear ring. After the arc-shaped limiting plate is extended, it embraces and surrounds the second connecting arm together with the semi-circular body, thereby realizing the limiting fixation of the second connecting arm.

[0013] As a preferred solution of the present invention, the semicircle body is further provided with an arc groove, an arc slider is fixed to the arc limit plate, and the arc slider is sleeved in the arc groove. When the arc limit plate moves, the arc slider always slides in the arc groove to guide the arc limit plate.

[0014] As a preferred solution of the present invention, the supporting unit includes a U-shaped plate, which is connected to the output end of the lifting mechanism, a rotating plate is hinged on the U-shaped plate, a locking mechanism is connected to the other end of the rotating plate, and a support plate is fixed to the lower side of the U-shaped plate, which supports the rotating plate.

[0015] The U-shaped plate is rotatably connected to the rotating plate, so that when the present invention is in working state, the rotating plate can be folded relative to the connecting plate to prevent the rotating plate from affecting the normal operation of various components. In the transport state, when the second connecting arm is folded relative to the first connecting arm at the same time, the rotating plate can be rotated to a position in contact with the support plate, so that the rotating plate is perpendicular to the second connecting arm, and the second connecting arm can be conveniently locked by the locking mechanism on the rotating plate. The support plate reliably supports the rotating plate to ensure that the locking mechanism locks the second connecting arm at a determined position.

[0016] As a preferred solution of the present invention, a shock absorbing unit is connected between the connecting plate and the rotating unit. When bumps occur during transportation, the shock absorbing unit can absorb the vibration energy during transportation and reduce the impact between the locking mechanism and the second connecting arm, thereby reducing component fatigue damage to a certain extent and extending the service life of the components of the device.

[0017] As a preferred embodiment of the present invention, the shock absorbing unit includes a sliding column, which is fixed on the connecting plate, a sliding groove is provided on the first connecting arm, the sliding column is sleeved in the sliding groove, and a shock absorbing spring is connected between one end of the sliding column extending into the sliding groove and the first connecting arm. When the sliding column slides in the sliding groove, the sliding column squeezes the shock absorbing spring, and the shock absorbing spring repeatedly stores and releases elastic potential energy, so that the sliding column is shock-absorbing, and then the connecting plate is shock-absorbing. When the connecting plate is shock-absorbing, the impact vibration between the second connecting arms of the locking mechanism is reduced.

[0018] As a preferred solution of the present invention, a rod groove is provided in the first connecting arm, a sliding rod is fixed to one end of the sliding column extending into the sliding groove, the sliding rod is sleeved in the rod groove, and the shock absorbing spring is sleeved on the sliding rod. When the shock absorbing spring performs a shock absorbing effect, the sliding rod moves in the rod groove, so that the sliding column is further guided to avoid excessive extrusion between the sliding column and the sliding groove.

[0019] As a preferred solution of the present invention, the universal unit includes an intermediate shaft, which is rotatably connected to one of the middle steel purlins in the foundation pit, and universal joints are connected to both sides of the intermediate shaft, the other end of one universal joint is rotatably connected to the end of the rotating unit away from the first connecting arm, and the other end of the other universal joint is rotatably connected to the end of the second connecting arm away from the control device. The universal joint adopts a spherical joint multi-degree-of-freedom articulated design, which can achieve 360° universal rotation freedom and a certain degree of installation error deflection compensation of the three axes X / Y / Z of the steel purlin, thereby achieving multi-directional adjustment in the horizontal and vertical directions to ensure the flexibility of the structure of the present invention in different directions to adapt to the complex shape of the connected device.

[0020] The beneficial effects of the present invention are: 1. The foldable universal mechanical structure for supporting the steel plate of the foundation pit support channel of the present invention has a reduced overall transportation volume and a shortened length after being folded. In the folded state, the locking mechanism on the support unit will lock the second connecting arm through the locking mechanism, so that the first connecting arm and the second connecting arm are relatively fixed, avoiding the collision of the second connecting arm and the first connecting arm due to the bumps during transportation in the folded state, thereby ensuring the safety and stability of each component of the present invention during transportation and extending the service life of the present invention to a certain extent.

[0021] 2. The foldable universal mechanical structure of the present invention is used to support the steel plate of the foundation pit support groove. After folding, the lifting mechanism supports height adjustment and can drive the support unit and the locking mechanism to rise and fall. When the second connecting arm is installed with integrated control devices of different weights, the height position of the locking mechanism is adjusted so that the locking mechanism is limited and fixed at different positions of the second connecting arm, thereby enabling the device to adapt to the change of the center of gravity of the second connecting arm when the control devices of different masses are installed, ensuring that the locking mechanism can always firmly limit and fix the second connecting arm when the control devices of different masses are installed, and ensuring the installation stability of the foldable universal mechanical structure under different load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional diagram of the folded state of the device of the present invention in a first direction; Figure 2 is a three-dimensional diagram of the folded state of the device of the present invention in the second direction; Figure 3 is a front view of the device of the present invention; Figure 4 yes Figure 3 Sectional view at AA in the middle; Figure 5 It is a left side view of the device of the present invention; Figure 6 yes Figure 5 Sectional view at the middle BB; Figure 7 yes Figure 6 A partial enlarged view of point C in the middle; Figure 8 yes Figure 6 A partial enlarged view of point D in the middle; Fig. 9 is a top view of the device of the present invention; Fig.10 It is an installation and connection scenario status diagram of the device of the present invention.

[0023] In the figure: 1-first connecting arm; 2-rotating unit; 3-universal unit; 4-second connecting arm; 5-connecting plate; 6-lifting mechanism; 7-supporting unit; 8-locking mechanism; 9-shock absorbing unit; 11-mounting base; 12-bearing column; 13-bearing seat; 21-rotating column; 22-connecting seat; 31-intermediate shaft; 32-universal joint; 41-mounting arm; 42-connecting column; 43-connecting arm; 51-adjusting slot; 61-lifting motor; 62-adjusting screw; 63-lifting block; 64-sleeve plate; 71-U-shaped plate; 72-rotating plate; 73-support plate; 81-locking motor; 82-main Moving gear; 83-semicircle body; 84-arc limit plate; 85-arc gear ring; 86-arc groove; 87-arc slider; 91-sliding column; 92-shock-absorbing spring; 93-sliding rod; 94-retaining ring; 111-first mounting hole; 112-control device; 221-sliding groove; 222-built-in groove; 223-rod groove; 321-first connecting member; 322-second connecting member; 323-connecting ball; 324-first connecting shaft; 325-second connecting shaft; 326-rotating block; 411-second mounting hole; 101-foundation pit; 102-middle steel purlin; 103-side steel purlin. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. 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.

[0026] like Figure 1 to Figure 3 , Figure 5 As shown, the foldable universal mechanical structure for supporting the foundation pit supporting groove steel plate of this embodiment includes a first connecting arm 1 connected to one of the side steel purlins 103 in the foundation pit 101, the other end of the first connecting arm 1 is rotatably connected to a rotating unit 2, the other end of the rotating unit 2 is rotatably connected to a universal unit 3, the middle part of the universal unit 3 is connected to one of the middle steel purlins 102 in the foundation pit 101, the other end of the universal unit 3 is rotatably connected to a second connecting arm 4, and the other end of the second connecting arm 4 is connected to another side steel purlin 103 in the foundation pit 101.

[0027] Specifically, Figure 1 to Figure 3 , Fig. 9 As shown, the first connecting arm 1 includes a mounting base 11, and a first mounting hole 111 is provided on the mounting base 11. The mounting base 11 is mounted on one of the side steel purlins 103 in the foundation pit 101 through the first mounting hole 111. A bearing column 12 is fixed to the other end of the mounting base 11, and a bearing seat 13 is fixed to the other end of the bearing column 12. The rotating unit 2 includes a rotating column 21, which is rotatably connected to the bearing seat 13, and a connecting seat 22 is fixed to the other end of the rotating column 21. A control device 112 is also installed on the mounting base 11.

[0028] The second connecting arm 4 includes a mounting arm 41, which is provided with a second mounting hole 411, and the mounting arm 41 is mounted on another side steel purlin 103 in the foundation pit 101 through the second mounting hole 411. A connecting column 42 is fixed to the other end of the mounting arm 41, and the other end of the connecting column 42 is telescopically connected to the connecting arm 43.

[0029] The universal unit 3 includes an intermediate shaft 31, which is connected to one of the intermediate steel purlins 102 in the foundation pit 101. Universal joints 32 are connected to both sides of the intermediate shaft 31. The other end of one universal joint 32 is rotatably connected to an end of the rotating unit 2 away from the first connecting arm 1, and the other end of the other universal joint 32 is rotatably connected to an end of the second connecting arm 4 away from the control device.

[0030] Specifically, the universal joint 32 adopts a dual-axis orthogonal hinge structure to ensure its flexible adjustment on the three axes of X / Y / Z. Specifically, it includes: a rotating block 326, a first connecting member 321, a second connecting member 322, a connecting ball 323, a first connecting shaft 324 and a second connecting shaft 325, wherein the rotating block 326 of one universal joint 32 is rotatably connected to the connecting seat 22, and the rotating block 326 of the other universal joint 32 is rotatably connected to the connecting arm 43. The rotating block 326 is fixed to the second connecting member 322, and the first connecting member 321 is fixed to the intermediate shaft 31. The first connecting shaft 324 and the second connecting shaft 325 are both fixed on the connecting ball 323, and the first connecting shaft 324 and the second connecting shaft 325 are perpendicular to each other, the first connecting shaft 324 is rotatably connected to the first connecting member 321, and the second connecting shaft 325 is rotatably connected to the second connecting member 322.

[0031] The two universal joints 32 of the universal unit 3 adopt a dual-axis orthogonal hinge structure, which can realize multi-degree-of-freedom adjustment of universal rotation, and the rotating column 21 can also rotate relative to the bearing seat 13. The present invention can be flexibly rotated in different directions, thereby realizing flexible rotation deformation, so the present invention can be used for connecting the steel purlins with uneven force or eccentric support in the foundation pit for adaptive hinge neutral plane alignment.

[0032] like Fig.10 As shown, the present invention is used to support the steel plate of the foundation pit support channel, which is hinged to the opposite side steel purlins and fixed to the middle steel purlins. The first mounting hole 111 and the second mounting hole 411 can be fixedly mounted and hinged to the two opposite side steel purlins 103, respectively, and the intermediate shaft 31 of the universal unit 3 can be fixedly connected to the middle steel purlin 102. Through the rotation of the universal joints 32 at both ends and the rotation of the universal joints 32 relative to the first connecting arm 1 or the second connecting arm 4, the foldable universal mechanical structure of this embodiment can connect irregularly arranged steel purlins. Combined with the rotation and rotation function of the rotating column 21, the flexibility of the present invention during connection is further improved. The present invention can achieve stable support for the steel plate of the foundation pit support channel, achieve greater lateral pressure resistance, reduce deformation or collapse of the steel purlin structure, and thus ensure construction safety. The present invention is suitable for the stable support of the steel plate of the foundation pit support channel under different conditions. The standardized quick-install interface design and the maintenance-free mechanical structure are convenient for disassembly and reuse, thereby reducing the difficulty of construction and improving the efficiency of equipment use.

[0033] Two sets of foldable universal mechanical structures are required in the same foundation pit. The first connecting arms 1, the first mounting holes and the second connecting arms 4, the second mounting holes at both ends of the two sets of foldable universal mechanical structures are respectively hinged to the two opposite side steel purlins 103 in the foundation pit, the universal unit 3 of one set of foldable universal mechanical structures is connected to one of the middle steel purlins 102, and the universal unit 3 of the other set of foldable universal mechanical structures is connected to the other middle steel purlin 102. After the two sets of mechanical structures are connected together, they form a closed shear-resistant system, and the steel purlins around the foundation pit are reliably connected.

[0034] The present invention is a foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove, which takes into account both rigid support and flexible adjustment. In the non-folded working state, through the composite hinge design of the double universal joint 32 and the intermediate shaft 31 of the universal unit 3, the three-dimensional adaptive alignment of the adjacent side steel purlins 103 and the middle steel purlin 102 is achieved through multi-directional adaptive rigid hinge, which effectively compensates for the misaligned installation deviation of the steel purlins caused by the asymmetric layout of the foundation pit 101, forms a multi-directional rigid hinge structure, improves the lateral compression stiffness, and suppresses the local deformation or stress concentration instability of the steel plate purlin of the support groove caused by uneven force. Secondly, the rotating column 21 of the rotating unit 2 and the connecting seat 22 form an adjustable angle support, combined with the retractable structure of the second connecting arm 4, to achieve the dynamic uniform transmission of the lateral load of the foundation pit 101, so that the surrounding steel purlins form a closed-loop shear resistance system, and the overall anti-overturning performance of the support structure is improved. Finally, both the mounting base 11 and the mounting arm 41 adopt a standardized quick-install interface (a first mounting hole 111 and a second mounting hole 411), combined with the maintenance-free bearing structure of the universal joint 32, which can be quickly disassembled and reused in different foundation pit 101 projects, optimize the stress distribution and anti-fatigue structure of the steel purlin connection node, and significantly reduce the frequency of support structure replacement and material replacement loss. In the loading and unloading transfer and transportation state, the present invention needs to be folded. In order to avoid the shaking caused by different road conditions in the folded state, which may cause the first connecting arm 1 to collide with the second connecting arm 4, the present invention is provided with a locking mechanism 8. In order to avoid the unstable center of gravity of the second connecting arm 4 when installing control devices of different weights, the present invention is provided with a lifting mechanism 6 on the support unit 7 connected to the locking mechanism 8.

[0035] like Figure 1 to Figure 3 As shown, a connecting plate 5 is connected to the connecting seat 22 of the rotating unit 2, a lifting mechanism 6 is installed on the connecting plate 5, an output end of the lifting mechanism 6 is connected to a supporting unit 7, and the other end of the supporting unit 7 is connected to a locking mechanism 8 for locking the connecting column 42.

[0036] During transportation, the locking motor 81 is started by the control device 112 to drive the driving gear 82 to rotate. At the same time, the rotating connections at both ends of the universal unit 3 are folded 90°, so that the first connecting arm 1 and the second connecting arm 4 rotate to the same direction. The overall length of the device of the present invention will be greatly shortened, making loading and unloading and transportation more convenient. Figure 1 to Figure 3 All of them are structural diagrams of the present invention in a folded state.

[0037] After the foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove of the present invention is folded, the connecting column 42 is electrically locked by the locking mechanism 8 on the supporting unit 7, so that the first connecting arm 1 and the second connecting arm 4 are relatively fixed, avoiding the collision between the second connecting arm 4 and the related accessories of the first connecting arm 1 due to the bumps in the transportation and loading and unloading process in the folded state, thereby ensuring the safety of the present invention during transportation and extending the service life of the present invention to a certain extent.

[0038] During transportation, a control device may be installed on the second connecting arm 4. The lifting mechanism 6 of the present invention can drive the support unit 7 and the locking mechanism 8 to rise and fall. When the mounting arm 41 is installed with control devices of different weights, the height of the locking mechanism 8 is adjusted so that the locking mechanism 8 can be limited and fixed at different positions of the connecting column 42, thereby making the device applicable to the change of the center of gravity of the mounting arm 41 when the control devices of different masses are installed, ensuring that when the control device loads of different masses are installed, the locking mechanism 8 can always be able to firmly limit and fix the second connecting arm 4, thereby ensuring the transportation safety and reliability of the device.

[0039] Specifically, Figure 1 and Figure 2 As shown, the lifting mechanism 6 includes a lifting motor 61, which is mounted on the connecting plate 5 and electrically connected to the control device 112. The connecting plate 5 is provided with an adjustment slot 51, and a lifting block 63 is sleeved in the adjustment slot 51. The output end of the lifting motor 61 is connected to an adjustment screw 62, and the adjustment screw 62 is connected to the lifting block 63 by a thread, and the support unit 7 is fixed to the lifting block 63. When the lifting motor 61 drives the adjustment screw 62 to rotate, the adjustment slot 51 limits the rotational freedom of the lifting block 63, so that the lifting block 63 can move up and down along the adjustment slot 51 under the drive of the adjustment screw 62. At the same time, the lifting block 63 drives the support unit 7 to rise and fall, so as to realize the continuous adjustment of the height direction of the locking mechanism 8.

[0040] Furthermore, a sleeve plate 64 is fixed on the lifting block 63, and the sleeve plate 64 is sleeved on the bearing column 12, and realizes linear movement and limited rotation through clearance fit. The bearing column 12 guides and limits the sleeve plate 64 and provides contact support, so that the other end of the sleeve plate 64 can stably support the support unit 7 through the lifting block 63, so as to prevent the lower end of the connecting plate 5 from being deformed when the locking mechanism 8 is subjected to excessive external extrusion pressure from the second connecting arm 4.

[0041] Since the sleeve plate 64 is in clearance fit with the bearing column 12, the sleeve plate 64 can move and rotate linearly relative to the bearing column 12. The sleeve plate 64 is allowed to rotate synchronously with the connecting seat 22 connected to the rotating column 21 when the rotating column 21 rotates, and at the same time, the universal unit 3 arranged on the connecting seat 22 is driven to rotate around the axis of the rotating column 21, which also makes the connecting plate 5 arranged on the connecting seat 22 rotate around the axis of the rotating column 21, and then makes the locking mechanism 8 arranged on the supporting unit 7 rotate around the axis of the rotating column 21, thereby ensuring that the locking mechanism 8 can rotate synchronously with the universal unit 3 around the axis of the rotating column 21, so that the universal unit 3 can be folded after being rotated to any position, and the locking mechanism 8 can reliably restrict and fix the connecting column 42.

[0042] Specifically, Figures 4 to 7 As shown, the locking mechanism 8 includes a locking motor 81, a driving gear 82, a half-circle body 83, an arc-shaped limit plate 84, and an arc-shaped ring gear 85. The locking motor 81 is mounted on the rotating plate 72 of the support unit 7 and is electrically connected to the control device 112. The output end of the locking motor 81 is connected to the driving gear 82. The locking mechanism 8 also includes a half-circle body 83 with at least one end open so that the arc-shaped limit plate can extend around. The half-circle body 83 is fixed on the rotating plate 72 of the support unit 7. An arc-shaped limit plate 84 is sleeved in the half-circle body 83. An arc-shaped ring gear 85 is arranged on the arc-shaped limit plate 84. The arc-shaped ring gear 85 meshes with the full tooth surface of the driving gear 82. After the arc-shaped limit plate 84 extends, it locks the connecting column 42 of the second connecting arm 4. The locking motor 81 drives the driving gear 82 to rotate, and the driving gear 82 drives the arc-shaped ring gear 85 to rotate, thereby prompting the arc-shaped limit plate 84 to move along the preset trajectory with the arc-shaped ring gear 85 and partially extend out of the half-circle body 83. When the device of the present invention is in the folded state, the rotation of the support unit 7 will cause the locking mechanism 8 to rotate to be vertically aligned with the second connecting arm 4, and the semi-circular body 83 will be in gap contact with the connecting column 42 of the second connecting arm 4. After the arc-shaped limiting plate 84 is extended, it cooperates with the semi-circular body 83 to surround and firmly clamp the connecting column 42 of the second connecting arm 4, thereby realizing the limiting, fixing and automatic locking function of the second connecting arm 4.

[0043] Furthermore, an arc groove 86 is further provided in the semicircular body 83, and an arc slider 87 is fixed on the arc limit plate 84, and the arc slider 87 is nested in the arc groove 86. During the movement of the arc limit plate 84, the arc slider 87 always slides in the arc groove 86, achieving the function of accurately guiding the arc limit plate 84, and ensuring the accuracy and stability of the locking action.

[0044] Specifically, Figure 1 to Figure 3 , Figure 6As shown, the support unit 7 includes a U-shaped plate 71, which is connected to the output end of the lifting mechanism 6. A rotating plate 72 is hinged on the U-shaped plate 71. The locking mechanism 8 is installed and connected to the other end of the rotating plate 72. A support plate 73 is fixed to the lower side of the U-shaped plate 71, and the support plate 73 supports and stabilizes the rotating plate 72.

[0045] The U-shaped plate 71 is rotatably connected to the rotating plate 72, so that when the device of the present invention is in working state, the rotating plate 72 can be folded relative to the connecting plate 5 to prevent the rotating plate 72 from affecting the normal operation of other components. When the device is in the transportation state, when the second connecting arm 4 is folded relative to the first connecting arm 1, the rotating plate 72 can be rotated to a position in contact with the support plate 73, so that the rotating plate 72 is perpendicular to the second connecting arm 4, which is convenient for locking the second connecting arm 4 through the locking mechanism 8 on the rotating plate 72. The support plate 73 ensures that the rotating plate 72 is reliably supported at a specific position, thereby ensuring that the locking mechanism 8 accurately locks the second connecting arm 4 at a determined position.

[0046] Furthermore, the connecting plate 5 is connected to the rotating unit 2 via a shock absorbing unit 9. When bumps and vibrations occur during transportation, the shock absorbing unit 9 can play a buffering role and effectively absorb vibration energy, reduce the impact force between the locking mechanism 8 and the second connecting arm 4, and significantly reduce the risk of fatigue damage to components caused by vibration, thereby extending the service life of the device to a certain extent.

[0047] Specifically, Figure 8 As shown, the damping unit 9 is composed of a sliding column 91, a damping spring 92 and a sliding groove 221. The sliding column 91 is fixed on the connecting plate 5, and its end extends into the connecting seat 22 of the first connecting arm 1 and is provided with a sliding groove 221. The sliding column 91 is sleeved in the sliding groove 221, and a damping spring 92 is connected between one end of the sliding column 91 extending into the sliding groove 221 and the first connecting arm 1, and the damping spring 92 is always in a pre-compressed state. During the folding and transportation of the device, when the sliding column 91 slides relatively in the sliding groove 221, the sliding column 91 periodically squeezes and releases the damping spring 92, and the damping spring 92 repeatedly stores and releases elastic potential energy, thereby providing elastic damping for the sliding column 91, and then transmitting the damping effect to the connecting plate 5. When the connecting plate 5 is damped, the impact force between the locking mechanism 8 and the second connecting arm 4 can be effectively reduced, thereby ensuring the stability and reliability of the device in a bumpy environment.

[0048] Furthermore, a rod groove 223 for guiding is provided in the first connecting arm 1, and a sliding rod 93 is fixed to one end of the sliding column 91 extending into the sliding groove 221, and the sliding rod 93 is precisely sleeved in the rod groove 223, and the shock absorbing spring 92 is sleeved on the sliding rod 93. When the shock absorbing spring 92 performs the shock absorbing function, the sliding rod 93 moves synchronously in the rod groove 223, providing high-precision axial guidance for the sliding column 91, avoiding excessive extrusion and wear between the sliding column 91 and the sliding groove 221 due to lateral force, and ensuring the long-term reliable operation of the shock absorbing unit 9.

[0049] In order to prevent the sliding column 91 from slipping out of the sliding groove 221 under extreme working conditions, a built-in groove 222 connected to the sliding groove 221 is further provided in the connecting seat 22. The diameter of the built-in groove 222 is larger than the diameter of the sliding groove 221, forming a step structure. A retaining ring 94 is fixed to one end of the sliding column 91 extending into the built-in groove 222. The retaining ring 94 is precisely overlapped on the step surface between the built-in groove 222 and the sliding groove 221. While providing axial limitation, it allows a certain range of elastic deformation to ensure that the sliding column 91 can still work stably when subjected to multi-dimensional impact.

[0050] Working principle: Reference Figures 1 to 9 When the device is in working state, the device is fixed on one of the side steel purlins 103 in the foundation pit 101 through the first mounting hole 111 on the mounting base 11, and the other side steel purlin is connected to the mounting arm 41 through the second mounting hole 411. The two universal joints 32 of the universal unit 3 can realize multi-degree-of-freedom universal rotation, the first connecting arm 1 and the second connecting arm 4 can both rotate relative to the universal unit 3 to adjust the angle, and the rotating column 21 can also rotate relative to the bearing seat 13. An integrated control device such as electric, hydraulic, and gas can be installed in the end mounting arm 41 of the second connecting arm 4, and the second connecting arm 4 can be telescopically adjustable according to the needs of the site. The present invention can flexibly rotate the multi-directional rigid hinge in different directions, thereby realizing flexible deformation and stable support. The design is particularly suitable for construction environments with staggered installation of steel purlins or complex foundation pit shapes (such as tilted, asymmetric layout, etc.), and can be extended to various types of mechanical equipment. Flexible connection of rigid hinges with multiple degrees of freedom between different structures.

[0051] After the use of the device is completed, it can be stored by the folding design of the device, so as to facilitate the storage and transportation of the device. When the device needs to be transported, the locking mechanism 8 can be controlled by the control device 112 to limit and fix the connecting column 42. The specific process is as follows: the locking motor 81 is driven to start by the control device 112, and the locking motor 81 drives the driving gear 82 to rotate. The driving gear 82 drives the meshing arc gear ring 85, so that the arc gear ring 85 rotates around the axis of the connecting column 42, and drives the arc limit plate 84 fixedly connected to the arc gear ring 85 to rotate synchronously around the axis of the connecting column 42. The arc slider 87 fixedly connected to the arc limit plate 84 slides along the arc groove 86 to a preset limit position until the arc slider 87 slides to the other end of the arc groove 86, at which time the arc limit plate 84 also partially slides out of the half circle body 83. The arc limit plate 84 and the half circle body 83 work together to form a closed lock on the connecting column 42, realizing the automatic limit locking and fixing function of the connecting column 42.

[0052] When the mounting arm 41 in the present device is installed with a control device in a folded state, the height position of the lifting mechanism 6 can be adjusted by the control device 112, and the position of the locking mechanism 8 can be adjusted to adapt to control devices of different weights. The specific process is as follows: the lifting motor 61 is started by the control device 112, and the adjusting screw 62 fixedly connected to the output end of the lifting motor 61 is driven to rotate. The adjusting screw 62 cooperates with the lifting block 63 through threaded transmission, driving the lifting block 63 to move up and down along the adjustment slot 51. At this time, the U-shaped plate 71 rises and falls with the lifting block 63, and the support unit 7 drives the locking mechanism 8 to rise and fall, realizing continuous adjustment in the height direction. The arc-shaped limit plate 84 of the locking mechanism 8 can be fixed according to the different positions of the connecting column 42. By adjusting the locking position, it can adapt to the change of the center of gravity when installing control devices of different masses, and ensure the stability and reliability of the device during transportation.

[0053] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate, characterized in that: The invention comprises a first connecting arm (1) connected to one of the side steel purlins (103) in the foundation pit (101); the other end of the first connecting arm (1) is rotatably connected to a rotating unit (2); the other end of the rotating unit (2) is rotatably connected to a universal unit (3); the middle part of the universal unit (3) is connected to one of the middle steel purlins (102) in the foundation pit (101); the other end of the universal unit (3) is rotatably connected to a second connecting arm (4); the other end of the second connecting arm (4) is connected to another side steel purlin (103) in the foundation pit (101); the rotating unit (2) is connected to a connecting plate (5); a lifting mechanism (6) is installed on the connecting plate (5); the output end of the lifting mechanism (6) is connected to a supporting unit (7); the other end of the supporting unit (7) is connected to a locking mechanism (8) for locking the second connecting arm (4).

2. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to claim 1, characterized in that: The lifting mechanism (6) comprises a lifting motor (61), the lifting motor (61) being mounted on the connecting plate (5), the output end of the lifting motor (61) being connected to an adjusting screw (62), the connecting plate (5) being provided with an adjusting slot (51), a lifting block (63) being sleeved in the adjusting slot (51), the lifting block (63) being threadedly connected to the adjusting screw (62), and the supporting unit (7) being fixed to the lifting block (63).

3. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to claim 2, characterized in that: A sleeve plate (64) is also fixed on the lifting block (63), and the sleeve plate (64) is sleeved on the first connecting arm (1).

4. The foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove according to claim 1, characterized in that: The locking mechanism (8) comprises a locking motor (81), the locking motor (81) is mounted on the support unit (7), and the output end of the locking motor (81) is connected to a driving gear (82); the locking mechanism (8) also comprises a semi-circular body (83) with at least one end open, the semi-circular body (83) is fixed on the support unit (7), an arc-shaped limiting plate (84) is sleeved in the semi-circular body (83), an arc-shaped gear ring (85) is arranged on the arc-shaped limiting plate (84), the arc-shaped gear ring (85) is meshed with the driving gear (82), and the arc-shaped limiting plate (84) locks the second connecting arm (4) after being extended.

5. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to claim 4, characterized in that: The semi-circular body (83) is further provided with an arc-shaped groove (86), and an arc-shaped slider (87) is fixed on the arc-shaped limiting plate (84), and the arc-shaped slider (87) is sleeved in the arc-shaped groove (86).

6. The foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove according to claim 1, characterized in that: The support unit (7) comprises a U-shaped plate (71), the U-shaped plate (71) being connected to the output end of the lifting mechanism (6), a rotating plate (72) being hingedly connected to the U-shaped plate (71), a locking mechanism (8) being connected to the other end of the rotating plate (72), a supporting plate (73) being fixed to the lower side of the U-shaped plate (71), and the supporting plate (73) supporting the rotating plate (72).

7. The foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove according to claim 1, characterized in that: A shock absorbing unit (9) is connected between the connecting plate (5) and the rotating unit (2).

8. The foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove according to claim 7, characterized in that: The shock absorbing unit (9) comprises a sliding column (91), the sliding column (91) being fixed on the connecting plate (5), a sliding groove (221) being provided on the first connecting arm (1), the sliding column (91) being sleeved in the sliding groove (221), and a shock absorbing spring (92) being connected between one end of the sliding column (91) extending into the sliding groove (221) and the first connecting arm (1).

9. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to claim 8, characterized in that: A rod groove (223) is provided in the first connecting arm (1); a sliding rod (93) is fixed to one end of the sliding column (91) extending into the sliding groove (221); the sliding rod (93) is sleeved in the rod groove (223); and the shock absorbing spring (92) is sleeved on the sliding rod (93).

10. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to any one of claims 1 to 9, characterized in that: The universal unit (3) comprises an intermediate shaft (31), the intermediate shaft (31) being connected to one of the intermediate steel purlins (102) in the foundation pit (101), and universal joints (32) being connected to both sides of the intermediate shaft (31), wherein the other end of one universal joint (32) is rotatably connected to an end of the rotating unit (2) away from the first connecting arm (1), and the other end of the other universal joint (32) is rotatably connected to an end of the second connecting arm (4) away from the control device.

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