A foldable universal mechanical structure for supporting the steel plates of a foundation pit retaining groove

Abstract

The present invention belongs to the technical field of universal mechanical mechanisms, and particularly relates to a foldable universal mechanical structure for supporting the steel plates of a foundation pit support groove. The present invention includes 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 universal unit is connected to one of the intermediate steel purlins. 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. A connecting plate is connected to the rotating unit. A lifting mechanism is installed on the connecting plate. The output end of the lifting mechanism is connected to a supporting unit. The other end of the supporting unit is connected to a locking mechanism for locking the second connecting arm. The present invention provides a foldable universal mechanical structure for supporting the steel plates of a foundation pit support groove, which can fix components at a suitable center of gravity position in the folded state to avoid mutual collision between components.

Description

Technical Field

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

[0002] After the foundation pit is excavated, it is necessary to use the steel plates of the foundation pit support groove to stably support the side wall of the foundation pit. The steel plates of the foundation pit support groove include two side steel purlins and two middle steel purlins. To ensure the stability of the steel plates of the foundation pit support groove, it is necessary to connect and fixedly hinge the two side steel purlins and the two middle steel purlins with rigid hinges. Since the two side steel purlins and the two middle steel purlins may not be able to adapt to the misaligned installation of the steel purlins or complex foundation pit shapes such as inclination and asymmetric layout, etc., the flexibility of support adjustment is insufficient and it is impossible to cope with the on-site construction environment. Therefore, it is necessary to use a universal mechanism structure to adaptively hinge and align the neutral plane between the side steel purlins and the middle steel purlins, so as not to be affected by uneven stress caused by misaligned installation of adjacent steel purlins or eccentric support. The universal mechanical mechanism for supporting the steel plates of the foundation pit support groove can rotate flexibly in different directions, so as to deform according to needs and provide effective support.

[0003] In the prior art, the mechanical structure for foundation pit support usually adopts a simple pure fixed hinge structure for connection and manual pin locking. The combined support structure is huge in volume and non-foldable, cannot be transported as a whole and cannot be reliably locked in the folded state, occupies a huge space and requires additional protection and preservation measures. During transportation, if not fixed and locked, collisions will occur between different components with flexible rotating universal mechanical mechanisms, resulting in 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 collisions between the mounting arms and other components in the universal mechanical mechanism, accelerating the fatigue damage of the universal mechanical mechanism. This not only increases the transportation risk and cost, but also may affect the normal use of the equipment. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a foldable universal mechanical structure for supporting the steel plates of a foundation pit support groove, which can be stably 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 as follows:

[0006] A foldable universal mechanical structure for supporting the steel plate of the 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 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; a connecting plate is connected to the rotating unit. A lifting mechanism is installed on the connecting plate. The output end of the lifting mechanism is connected to a supporting unit. The other end of the supporting unit is connected to a locking mechanism for locking the second connecting arm.

[0007] During 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 another side steel purlin. Through the self-rotation of the universal unit at both ends and the rotation of the universal unit 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 realizes stable support for the steel plate of the foundation pit support groove, improves the large lateral pressure resistance, reduces the deformation amount or collapse hidden danger of the steel purlin structure, and improves the structural reuse times while ensuring construction safety. The present invention is adapted to the steel plates of foundation pit support grooves in different situations and is convenient for disassembly and reuse, thereby reducing the construction difficulty and improving the equipment use efficiency.

[0008] During the long-distance loading, unloading and transportation process, the two rotating connection parts at both ends of the universal unit are folded by 90°, 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, and the space occupied by the device is extremely reduced, which is convenient for loading, unloading and transportation.

[0009] After the foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove 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 collision of the corresponding parts of the second connecting arm and the first connecting arm due to the bumps during the transportation process in the folded state, thereby ensuring the anti-bumping ability of the present invention during the transportation process and extending the safe service life of the present invention to a certain extent.

[0010] An integrated control device such as electro-hydraulic-pneumatic can be installed inside the end mounting arm of the second connecting arm of the present invention to adapt to more engineering support application scenarios with high efficiency, precision, safety and reliability. 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 lift. 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 of the center of gravity when the second connecting arm is installed with control devices of different masses, and ensuring that the locking mechanism can always stably limit and fix the second connecting arm when installing and configuring control devices of different masses.

[0011] As a preferred embodiment of the present invention, the lifting mechanism includes a lifting motor installed on the connecting plate. The output end of the lifting motor is connected with an adjusting screw rod. An adjusting groove is provided on the connecting plate, and a lifting block is sleeved in the adjusting groove. The lifting block is threadedly connected with the adjusting screw rod, and the support unit is fixed to the lifting block. The lifting motor drives the adjusting screw rod to rotate, and the adjusting groove restricts the rotational freedom of the lifting block, so that the lifting block realizes lifting under the drive of the adjusting screw rod. The lifting block drives the support unit to lift, realizing the adjustment of the height of the locking mechanism.

[0012] As a preferred embodiment of the present invention, a sleeve plate is further 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 support unit through the lifting block, avoiding the deformation of the lower end of the connecting plate when the locking mechanism is subjected to excessive extrusion force from the second connecting arm.

[0013] As a preferred embodiment of the present invention, the locking mechanism includes a locking motor installed on the support unit, and the output end of the locking motor is connected with a driving gear; the locking mechanism further includes a semi-circular body with at least one end open, which is fixed on the support unit. An arc-shaped limiting plate is sleeved in the semi-circular body, and an arc-shaped gear ring is provided on the arc-shaped limiting plate. The arc-shaped gear ring and the driving gear form a full tooth surface meshing transmission, and the arc-shaped limiting plate locks the second connecting arm after extending out. 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 extends out, it hugs and surrounds the second connecting arm together with the semi-circular body, realizing the limiting and fixing of the second connecting arm.

[0014] As a preferred embodiment of the present invention, an arc-shaped groove is further provided in the semi-circular body, and an arc-shaped sliding block is fixed on the arc-shaped limiting plate. The arc-shaped sliding block is sleeved in the arc-shaped groove. When the arc-shaped limiting plate moves, the arc-shaped sliding block always slides in the arc-shaped groove, realizing the guiding effect on the arc-shaped limiting plate.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] As a preferred embodiment of the present invention, the universal unit includes an intermediate shaft, which is rotatably connected to one of the intermediate steel girders in the foundation pit. 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 rotary freedom and a certain degree of installation error deflection compensation for the X / Y / Z three axes of the steel girder, so as to realize multi-directional adjustment in the horizontal and vertical directions to ensure the flexibility of the structure of the present invention in different directions and adapt to the complex shape of the device to be connected.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The foldable universal mechanical structure of the present invention for supporting the steel plate of the foundation pit support groove has a reduced overall transportation volume and length after folding. In the folded state, the locking mechanism on the support unit will lock the second connecting arm, so that the first connecting arm and the second connecting arm are relatively fixed, avoiding component collision between the second connecting arm and the first connecting arm due to 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.

[0023] 2. The foldable universal mechanical structure of the present invention for supporting the steel plate of the foundation pit support groove supports height adjustment after folding and can drive the support unit and the locking mechanism to lift. When different weights of integrated control devices are installed inside the second connecting arm, the height position of the locking mechanism is adjusted to limit and fix the locking mechanism at different positions of the second connecting arm, so that the device can adapt to the center of gravity change when different masses of control devices are installed on the second connecting arm, ensuring that the locking mechanism can always stably limit and fix the second connecting arm when different masses of control devices are installed, and ensuring the installation stability of the foldable universal mechanical structure under different load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional view of the folded state of the device of the present invention in the first direction;

[0025] Figure 2 is a three-dimensional view of the folded state of the device of the present invention in the second direction;

[0026] Figure 3 is the front view of the device of the present invention;

[0027] Figure 4 is Figure 3 the cross-sectional view at A-A in

[0028] Figure 5 is the left view of the device of the present invention;

[0029] Figure 6 is Figure 5 The sectional view taken along line B-B in it;

[0030] Figure 7 is Figure 6 The enlarged partial view at position C in it;

[0031] Figure 8 is Figure 6 The enlarged partial view at position D in it;

[0032] Figure 9 is the top view of the device of the present invention;

[0033] Figure 10 is the state diagram of the installation and connection scenario of the device of the present invention.

[0034] In the figure: 1 - the first connecting arm; 2 - the rotating unit; 3 - the universal unit; 4 - the second connecting arm; 5 - the connecting plate; 6 - the lifting mechanism; 7 - the supporting unit; 8 - the locking mechanism; 9 - the shock absorption unit; 11 - the mounting base; 12 - the bearing column; 13 - the bearing seat; 21 - the rotating column; 22 - the connecting seat; 31 - the intermediate shaft; 32 - the universal joint; 41 - the mounting arm; 42 - the connecting column; 43 - the connecting arm; 51 - the adjusting groove; 61 - the lifting motor; 62 - the adjusting screw; 63 - the lifting block; 64 - the sleeve plate; 71 - the U-shaped plate; 72 - the rotating plate; 73 - the supporting plate; 81 - the locking motor; 82 - the driving gear; 83 - the semi-circular body; 84 - the arc-shaped limiting plate; 85 - the arc-shaped gear ring; 86 - the arc-shaped groove; 87 - the arc-shaped sliding block; 91 - the sliding column; 92 - the shock absorption spring; 93 - the sliding rod; 94 - the retaining ring; 111 - the first mounting hole; 112 - the control device; 221 - the sliding groove; 222 - the built-in groove; 223 - the rod groove; 321 - the first connecting piece; 322 - the second connecting piece; 323 - the connecting ball; 324 - the first connecting shaft; 325 - the second connecting shaft; 326 - the rotating block; 411 - the second mounting hole; 101 - the foundation pit; 102 - the middle steel diaphragm wall; 103 - the side steel diaphragm wall. Detailed implementation manners

[0035] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0036] Accordingly, 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention may be combined with each other.

[0037] As Figures 1 to 3 , Figure 5 shown, the foldable universal mechanical structure for supporting the steel plate of the foundation pit support trench in this embodiment includes a first connecting arm 1 connected to one of the side steel wales 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 of the universal unit 3 is connected to one of the middle steel wales 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 the other side steel wale 103 in the foundation pit 101.

[0038] Specifically, as Figures 1 to 3 , Figure 9 shown, the first connecting arm 1 includes a mounting base 11. A first mounting hole 111 is provided on the mounting base 11. The mounting base 11 is mounted on one of the side steel wales 103 in the foundation pit 101 through the first mounting hole 111. The other end of the mounting base 11 is fixed with a load-bearing column 12. The other end of the load-bearing column 12 is fixed with a bearing seat 13. The rotating unit 2 includes a rotating column 21. The rotating column 21 is rotatably connected to the bearing seat 13. The other end of the rotating column 21 is fixed with a connecting seat 22. A control device 112 is also mounted on the mounting base 11.

[0039] The second connecting arm 4 includes a mounting arm 41. A second mounting hole 411 is provided on the mounting arm 41. The mounting arm 41 is mounted on the other side steel wale 103 in the foundation pit 101 through the second mounting hole 411. The other end of the mounting arm 41 is fixed with a connecting column 42. The other end of the connecting column 42 is telescopically connected to a connecting arm 43.

[0040] The universal unit 3 includes an intermediate shaft 31. The intermediate shaft 31 is connected to one of the middle steel wales 102 in the foundation pit 101. Both sides of the intermediate shaft 31 are connected with universal joints 32. The other end of one universal joint 32 is rotatably connected to the end of the rotating unit 2 away from the first connecting arm 1. The other end of the other universal joint 32 is rotatably connected to the end of the second connecting arm 4 away from the control device.

[0041] Specifically, the universal joint 32 adopts a biaxial orthogonal hinge structure to ensure its flexible adjustment on the X / Y / Z three axes. 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. 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. Both the first connecting shaft 324 and the second connecting shaft 325 are fixedly penetrated on the connecting ball 323. The first connecting shaft 324 and the second connecting shaft 325 are perpendicular and orthogonal 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.

[0042] The two universal joints 32 of the universal joint unit 3 adopt a biaxial 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 flexibly rotate in different directions, so as to realize flexible rotation and deformation. Therefore, the present invention can be used to connect the self-adaptive articulated neutral plane alignment of the steel waling with uneven stress or support eccentricity during misaligned installation in the foundation pit.

[0043] As Figure 10 shown, the present invention is used to support the steel plate of the foundation pit support groove, and is articulated to the opposite side steel waling and fixedly connected to the intermediate steel waling. The first installation hole 111 and the second installation hole 411 can be respectively fixedly installed and articulated to the two opposite side steel walings 103, and at the same time, the intermediate shaft 31 of the universal joint unit 3 can be fixedly connected to the intermediate steel waling 102. Through the self-rotation of the two end universal joints 32 and the rotation of the universal joint 32 relative to the first connecting arm 1 or the second connecting arm 4, the foldable universal mechanical structure of this embodiment can connect the irregularly arranged steel walings. Combining with the rotation function of the rotating column 21, the flexibility during connection of the present invention is further improved. The present invention can realize stable support for the steel plate of the foundation pit support groove, achieve greater lateral pressure resistance, reduce the deformation or collapse of the steel waling structure, thereby ensuring construction safety. The present invention is adapted to the stable support of the steel plates of foundation pit support grooves in different situations. The standardized quick-install interface design and the maintenance-free mechanical structure are convenient for disassembly and repeated use, thereby reducing the construction difficulty and improving the equipment use efficiency.

[0044] 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.

[0045] 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.

[0046] like Figures 1 to 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.

[0047] 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.Figures 1 to 3 These are all structural diagrams of the folded state of the present invention.

[0048] After the foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove of the present invention is folded, the electric control locking of the connecting column 42 is realized through the locking mechanism 8 on the support unit 7, so that the first connecting arm 1 and the second connecting arm 4 are relatively fixed, avoiding the collision of the related accessory components of the second connecting arm 4 and the first connecting arm 1 due to the bumps during the transportation and loading / 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.

[0049] 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 lift. When different weights of control devices are installed on the mounting arm 41, 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 enabling the device to adapt to the center of gravity change when different masses of control devices are installed on the mounting arm 41, ensuring that when different masses of control device loads are installed, the locking mechanism 8 can always stably limit and fix the second connecting arm 4, and ensuring the transportation safety and reliability of the device.

[0050] Specifically, as Figure 1 and Figure 2 shown, the lifting mechanism 6 includes a lifting motor 61. The lifting motor 61 is installed on the connecting plate 5 and is electrically connected to the control device 112. An adjustment groove 51 is provided on the connecting plate 5. A lifting block 63 is sleeved in the adjustment groove 51. The output end of the lifting motor 61 is connected with an adjustment screw 62. The adjustment screw 62 is threadedly connected with the lifting block 63. 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 groove 51 restricts the rotational freedom of the lifting block 63, so that the lifting block 63 moves up and down along the adjustment groove 51 under the drive of the adjustment screw 62. At the same time, the lifting block 63 drives the support unit 7 to lift, realizing continuous adjustment of the height direction of the locking mechanism 8.

[0051] Furthermore, a sleeve plate 64 is also fixed on the lifting block 63. 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 functions to guide, limit and contact support the sleeve plate 64, so that the other end of the sleeve plate 64 can stably support the support unit 7 through the lifting block 63, avoiding the deformation of the lower end of the connecting plate 5 when the locking mechanism 8 is subjected to excessive external extrusion force from the second connecting arm 4.

[0052] Since the template 64 is in clearance fit with the bearing column 12, the template 64 can linearly move and rotate relative to the bearing column 12. When the connecting seat 22 connected to the rotating column 21 rotates with the rotating column 21, it is allowed that the template 64 rotates synchronously therewith. At the same time, the universal unit 3 provided on the connecting seat 22 also rotates around the axis of the rotating column 21, which also causes the connecting plate 5 provided on the connecting seat 22 to rotate around the axis of the rotating column 21. Furthermore, the locking mechanism 8 provided on the support unit 7 also rotates around the axis of the rotating column 21, so as to ensure that the locking mechanism 8 can rotate around the axis of the rotating column 21 synchronously with the universal unit 3, so that after the universal unit 3 rotates to any position and performs a folding operation, the locking mechanism 8 can reliably limit and fix the connecting column 42.

[0053] Specifically, as Figures 4 to 7 shown, the locking mechanism 8 includes a locking motor 81, a driving gear 82, a semi-circular body 83, an arc-shaped limiting plate 84, and an arc-shaped gear ring 85. The locking motor 81 is installed 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 further includes a semi-circular body 83 with at least one open end for the arc-shaped limiting plate to extend out. The semi-circular body 83 is fixed on the rotating plate 72 of the support unit 7. An arc-shaped limiting plate 84 is sleeved inside 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 in full tooth surface engagement with the driving gear 82. After the arc-shaped limiting plate 84 extends out, 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 gear ring 85 to rotate, so as to cause the arc-shaped limiting plate 84 to move along a preset track with the arc-shaped gear ring 85 and partially extend out of the semi-circular body 83. When the device of the present invention is in a 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 is in clearance contact with the connecting column 42 of the second connecting arm 4. After the arc-shaped limiting plate 84 extends out, it cooperates with the semi-circular body 83 to jointly embrace and firmly clamp the connecting column 42 of the second connecting arm 4, realizing the function of automatically locking and limiting the second connecting arm 4.

[0054] Furthermore, an arc-shaped groove 86 is further arranged inside the semi-circular body 83. An arc-shaped sliding block 87 is fixed on the arc-shaped limiting plate 84. The arc-shaped sliding block 87 is nested in the arc-shaped groove 86. During the movement of the arc-shaped limiting plate 84, the arc-shaped sliding block 87 always slides in the arc-shaped groove 86, realizing the function of accurately guiding the arc-shaped limiting plate 84 and ensuring the accuracy and stability of the locking action.

[0055] Specifically, as Figures 1 to 3 、 Figure 6As shown, the support unit 7 includes a U-shaped plate 71. The U-shaped plate 71 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 stably supports the rotating plate 72.

[0056] The U-shaped plate 71 is rotatably connected to the rotating plate 72. Thus, when the device of the present invention is in the 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 and the second connecting arm 4 is folded relative to the first connecting arm 1, the rotating plate 72 can be rotated to a position where it is in contact with the support plate 73, so that the rotating plate 72 is perpendicular to the second connecting arm 4, facilitating the locking of the second connecting arm 4 by 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.

[0057] Furthermore, the connecting plate 5 and the rotating unit 2 are connected by a shock-absorbing unit 9. When there are bumps and vibrations during transportation, the shock-absorbing unit 9 can play a buffering role to effectively absorb the 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 the components caused by vibration, thereby extending the service life of the device to a certain extent.

[0058] Specifically, as Figure 8 shown, the shock-absorbing unit 9 is composed of a sliding column 91, a shock-absorbing spring 92 and a sliding groove 221. The sliding column 91 is fixed to the connecting plate 5. The end of the sliding column 91 extends into the connecting seat 22 of the first connecting arm 1 where there is a sliding groove 221. The sliding column 91 is sleeved in the sliding groove 221. A shock-absorbing spring 92 is connected between the end of the sliding column 91 extending into the sliding groove 221 and the first connecting arm 1. The shock-absorbing spring 92 is always in a pre-compressed state. During the folding and transportation of the device, when the sliding column 91 slides relative to the sliding groove 221, the sliding column 91 periodically squeezes and releases the shock-absorbing spring 92. By repeatedly storing and releasing the elastic potential energy of the shock-absorbing spring 92, an elastic shock-absorbing effect is provided for the sliding column 91, and then the shock-absorbing effect is transmitted to the connecting plate 5. When the connecting plate 5 is shock-absorbed, the impact force between the locking mechanism 8 and the second connecting arm 4 can be effectively reduced, ensuring the stability and reliability of the device in a bumpy environment.

[0059] 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.

[0060] 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.

[0061] Working principle:

[0062] 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.

[0063] After the use of this device is completed, it can be stored by means of the folding design of this device, which is convenient for the storage and transportation of this 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-shaped gear ring 85, so that the arc-shaped gear ring 85 rotates around the axis of the connecting column 42, driving the arc-shaped limiting plate 84 fixedly connected to the arc-shaped gear ring 85 to rotate synchronously around the axis of the connecting column 42. The arc-shaped slider 87 fixedly connected to the arc-shaped limiting plate 84 slides along the arc-shaped groove 86 to a preset limiting position until the arc-shaped slider 87 slides to the other end of the arc-shaped groove 86. At this time, the arc-shaped limiting plate 84 also partially slides out of the semi-cylinder 83. The arc-shaped limiting plate 84 and the semi-cylinder 83 cooperate to form a clamping and locking of the connecting column 42, realizing the automatic limiting and locking function of the connecting column 42.

[0064] When the control device is installed on the installation arm 41 of this device in the folded state, the height position of the lifting mechanism 6 can be adjusted by the control device 112 to adjust the position of the locking mechanism 8 to adapt to control devices of different weights. The specific process is as follows. The lifting motor 61 is controlled by the control device 112 to start, driving the adjusting screw 62 fixedly connected to the output end of the lifting motor 61 to rotate. The adjusting screw 62 and the lifting block 63 are in threaded transmission cooperation, driving the lifting block 63 to move up and down along the adjusting groove 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 limiting plate 84 of the locking mechanism 8 can be limited and fixed according to 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, ensuring the stability and reliability of the device during transportation.

[0065] The present invention is not limited to the above optional embodiments. Anyone can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they all 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); 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.

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 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).

5. 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).

6. 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).

7. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to claim 6, 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).

8. The foldable universal mechanical structure for supporting the steel plate of the foundation pit support groove according to claim 7, 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).

9. A foldable universal mechanical structure for supporting a foundation pit support groove steel plate according to any one of claims 1 to 8, 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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