supporting device

Abstract

The utility model belongs to the foundation pit construction technical field discloses a supporting device, including support plate subassembly, bracing mechanism and adjusting mechanism, bracing mechanism includes bracing axle, driven axle and driven part, and bracing axle and driven axle are coaxial, and the both ends of driven axle are respectively screwed with a bracing axle, and two bracing axles can be detachably connected in one -to -one correspondence in two support plate subassembly, and driven part is fixedly connected in driven axle, and adjusting mechanism includes bearing axle, driving axle, driving part and hook, is provided with two hooks on bearing axle, and driving axle sleeve sets up in the outside of bearing axle, and is fixed with two driving parts on driving axle, in one adjusting mechanism, two hooks are in one -to -one correspondence and are hooked in the driven axle of two bracing mechanisms when locating, and two driving parts are in one -to -one correspondence and are transmissionally connected in the driven part of two bracing mechanisms. In the utility model, support plate subassembly, bracing mechanism and adjusting mechanism three, can conveniently carry out dismouting, and the space is small when dismounting and placing, and is convenient to move.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit construction technology, and in particular to a support device. Background Technology

[0002] In the construction process of building and civil engineering, the excavation of the foundation pit is a critical basic procedure. Because the excavation of the foundation pit will disrupt the original stress balance of the soil at the construction site, the sidewalls of the foundation pit are at risk of collapse under their own weight and the lateral pressure of the surrounding soil, which poses a serious safety hazard to construction personnel and the surrounding environment. It is necessary to install support devices to support the sidewalls of the foundation pit. The support devices are used to apply lateral bracing force on the two opposite sidewalls of the foundation pit to maintain the stability of the foundation pit.

[0003] However, existing support devices typically require separate adjustments to the expansion joints on both sides during installation and adjustment. This method makes it difficult to precisely control the supporting force applied on both sides, which can easily lead to uneven stress on the side walls of the foundation pit. Uneven supporting forces can not only cause twisting and damage to the support device itself, but also cause stress concentration on the side walls of the foundation pit, inducing local soil instability and leaving safety hazards. Furthermore, existing support devices have complex structures, are inconvenient to assemble and disassemble, occupy a lot of space during disassembly and placement, and are not easy to move. In addition, the expansion joints on them have a small range of expansion and contraction, and are applicable to a small range of foundation pit widths. Utility Model Content

[0004] The purpose of this utility model is to provide a support device that applies balanced supporting forces to both sides, is easy to assemble and disassemble, occupies little space, and has a wide range of applications.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Support device, including:

[0007] Support plate assembly;

[0008] The supporting mechanism includes a supporting shaft, a driven shaft, and a driven member. The supporting shaft and the driven shaft are coaxially arranged. Each end of the driven shaft is screwed with a supporting shaft. The two supporting shafts can be detachably connected to the two support plate assemblies in a one-to-one correspondence. The driven member is fixedly connected to the driven shaft.

[0009] An adjusting mechanism includes a bearing shaft, a drive shaft, a drive member, and hooks. Two hooks are provided on the bearing shaft. The drive shaft is sleeved on the outside of the bearing shaft. Two drive members are fixed on the drive shaft. In one adjusting mechanism, when the two hooks are aligned and hooked onto the driven shafts of the two supporting mechanisms, the two drive members are connected to the driven members of the two supporting mechanisms in a corresponding transmission manner. When the drive shaft rotates, it can drive the two driven shafts to rotate through the transmission of the drive members and the driven members. In one supporting mechanism, when the driven shaft rotates relative to the two supporting shafts, it can drive the two supporting shafts to move towards or away from each other.

[0010] Preferably, the support plate assembly includes:

[0011] plate body;

[0012] A connecting frame is fixedly mounted on the plate body. The connecting frame is provided with a connecting groove, which extends along a first direction parallel to the plate surface direction. The supporting shaft can be adjusted to be connected to the connecting groove along the first direction.

[0013] Preferably, the support plate assembly further includes:

[0014] The splicing block is connected to the connecting frame;

[0015] A splicing protrusion is connected to the splicing block. The connecting frame is provided with a splicing hole communicating with the connecting groove. The splicing block of one support plate assembly can be inserted into the connecting groove of another support plate assembly along the first direction. When the splicing block is inserted into the connecting groove, the splicing protrusion extends into the splicing hole.

[0016] Preferably, the support plate assembly further includes a first elastic element, and the splicing block is provided with a receiving channel. The first elastic element is disposed in the receiving channel, and both ends of the first elastic element are respectively connected to a splicing protrusion. One end of the splicing protrusion extends into the receiving channel, and the other end extends out of the splicing block.

[0017] Preferably, the supporting mechanism further includes:

[0018] A connecting block is rotatably connected to one end of the supporting shaft away from the driven shaft, and a connecting hole is provided on the connecting block;

[0019] The connecting frame has multiple locking holes, which are spaced apart along the first direction and connected to the connecting groove. When the connecting block is placed in the connecting groove, the pin can be inserted into the connecting hole and any of the locking holes to lock the connecting block to the connecting frame.

[0020] Preferably, the driven shaft is cylindrical, and the inner walls at both ends of the driven shaft are respectively provided with internal threads, and the internal threads at both ends of the driven shaft rotate in opposite directions.

[0021] Preferably, both the driving member and the driven member are bevel gears, and when the hook is aligned and hooked onto the driven shaft, the driving member engages with the driven member.

[0022] Preferably, the drive shaft includes:

[0023] Two main shaft sections are sleeved on the outside of the bearing shaft, and each of the two main shaft sections has a drive component fixed at one of its opposite ends.

[0024] The second elastic element is sandwiched between the two main shaft segments;

[0025] A sleeve is fitted onto the outer side of the two main shaft sections. On the outer wall of the main shaft section and the inner wall of the sleeve, one is provided with a protrusion and the other is provided with a guide groove. The guide groove extends along the axial direction of the drive shaft, and the protrusion is slidably disposed in the guide groove along the axial direction of the drive shaft.

[0026] Preferably, the hook is U-shaped, and the second elastic element drives the active element to abut against the hook.

[0027] Preferably, the outer wall of the driven shaft is provided with a limiting ring groove, and when the hook is hooked in the limiting ring groove, the driving member is connected to the driven member.

[0028] The beneficial effects of this utility model are:

[0029] The supporting shaft of the supporting mechanism can be detachably connected to the support plate assembly, and the hook of the adjusting mechanism can be aligned and hooked to the driven shaft of the supporting mechanism. Thus, the support plate assembly, the supporting mechanism, and the adjusting mechanism can be easily assembled and disassembled. They occupy little space during disassembly and placement and are easy to move. Furthermore, the supporting shaft is coaxially screwed to one end of the driven shaft. In one supporting mechanism, when the driven shaft rotates relative to the two supporting shafts, it can drive the two supporting shafts to move towards or away from each other. This makes the extension and retraction range of the supporting mechanism larger, the supporting force applied to both sides more balanced, and the supporting more stable and reliable, effectively expanding the application range of the support device. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the support device described in an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional structural diagram of the splicing block, splicing protrusion and first elastic element in cooperation as described in an embodiment of the present utility model;

[0032] Figure 3 This is a schematic diagram of the supporting mechanism described in an embodiment of the present invention;

[0033] Figure 4 This is a disassembly diagram of the adjustment mechanism described in an embodiment of this utility model.

[0034] In the picture:

[0035] 1. Support plate assembly;

[0036] 11. Plate body;

[0037] 12. Connecting frame; 121. Connecting groove; 122. Splicing hole; 123. Lifting hole; 124. Pressure rod; 125. Locking hole;

[0038] 13. Interlocking block; 131. Accommodation channel;

[0039] 14. Splicing protruding heads;

[0040] 15. First elastic element;

[0041] 2. Supporting institutions;

[0042] 21. Support shaft;

[0043] 22. Driven shaft;

[0044] 23. Follower;

[0045] 24. Connecting block; 241. Connecting hole;

[0046] 25. Bolt;

[0047] 3. Adjustment mechanism;

[0048] 31. Bearing shaft;

[0049] 32. Drive shaft; 321. Main shaft section; 3211. Protrusion; 322. Second elastic element; 323. Sleeve; 3231. Guide groove;

[0050] 33. Active item;

[0051] 34. Hook. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0053] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0056] like Figures 1 to 4As shown, this utility model provides a support device, including a support plate assembly 1, a supporting mechanism 2, and an adjusting mechanism 3. The supporting mechanism 2 includes a supporting shaft 21, a driven shaft 22, and a driven member 23. The supporting shaft 21 and the driven shaft 22 are coaxially arranged. A supporting shaft 21 is screwed to each end of the driven shaft 22. The two supporting shafts 21 are detachably connected to two support plate assemblies 1 in a one-to-one correspondence. The driven member 23 is fixedly connected to the driven shaft 22. The adjusting mechanism 3 includes a bearing shaft 31, a driving shaft 32, an adjusting member 33, and hooks 34. Two hooks 34 are provided on the bearing shaft 31. The driving shaft 32 is sleeved on the outside of the bearing shaft 31. Two driving members 33 are fixed on the shaft 32. In an adjustment mechanism 3, when the two hooks 34 are aligned and hooked onto the driven shafts 22 of the two supporting mechanisms 2, the two driving members 33 are connected to the driven members 23 of the two supporting mechanisms 2. When the driving shaft 32 rotates, it can drive the two driven shafts 22 to rotate through the transmission of the driving members 33 and the driven members 23. In a supporting mechanism 2, when the driven shaft 22 rotates relative to the two supporting shafts 21, it can drive the two supporting shafts 21 to move towards or away from each other.

[0057] In this utility model, the supporting shaft 21 of the supporting mechanism 2 can be detachably connected to the support plate assembly 1, and the hook 34 of the adjusting mechanism 3 can be aligned and hooked to the driven shaft 22 of the supporting mechanism 2. Thus, the support plate assembly 1, the supporting mechanism 2 and the adjusting mechanism 3 can be easily disassembled and assembled. They occupy little space when disassembling and placing, and are easy to move. Furthermore, the supporting shaft 21 is coaxially screwed to one end of the driven shaft 22. In one supporting mechanism 2, when the driven shaft 22 rotates relative to the two supporting shafts 21, it can drive the two supporting shafts 21 to move towards or away from each other, so that the extension and retraction range of the supporting mechanism 2 is larger, the supporting force applied to both sides is more balanced, the supporting is more stable and reliable, and the application range of the support device is effectively expanded.

[0058] Specifically, the support plate assembly 1 includes a plate body 11 and a connecting frame 12. The connecting frame 12 is fixedly mounted to the plate body 11 and has a connecting groove 121 extending along a first direction parallel to the surface direction of the plate body 11. The abutment shaft 21 is adjustablely connected to the connecting groove 121 along the first direction. This arrangement allows the abutment mechanism 2 to be adjusted to abut against multiple positions on the plate body 11 via the connecting frame 12, thus enabling adaptive adjustments based on the actual conditions of the foundation pit.

[0059] More specifically, the support plate assembly 1 also includes a splicing block 13 and a splicing protrusion 14. The splicing block 13 is connected to the connecting frame 12, and the splicing protrusion 14 is connected to the splicing block 13. The connecting frame 12 is provided with a splicing hole 122 communicating with the connecting groove 121. The splicing block 13 of one support plate assembly 1 can be inserted into the connecting groove 121 of another support plate assembly 1 along a first direction. When the splicing block 13 is inserted into the connecting groove 121, the splicing protrusion 14 extends into the splicing hole 122. This configuration allows for the adaptation of the required number of support plate assemblies 1 according to the length or depth of the pit. Multiple support plate assemblies 1 can be connected together through the cooperation of the splicing block 13 and the splicing protrusion 14, improving the reliability and stability of the support operation.

[0060] More specifically, the support plate assembly 1 also includes a first elastic element 15. A receiving channel 131 is provided through the splicing block 13, and the first elastic element 15 is disposed within the receiving channel 131. Both ends of the first elastic element 15 are respectively connected to a splicing protrusion 14. One end of the splicing protrusion 14 extends into the receiving channel 131, and the other end extends out of the splicing block 13. A splicing hole 122 is provided on each side of the connecting groove 121, and the two splicing holes 122 are aligned. Under the drive of the first elastic element 15, the two splicing protrusions 14 can extend into the two splicing holes 122 one-to-one. This arrangement allows the first elastic element 15 to automatically drive the two splicing protrusions 14 into the two splicing holes 122 one-to-one after the splicing block 13 is inserted into the connecting groove 121, achieving automatic splicing locking.

[0061] In this embodiment, the first elastic element 15 is a spring, and a guide surface is provided on one side of the splicing protrusion 14. During the process of inserting the splicing block 13 into the connecting groove 121, the inner wall of the connecting groove 121 pushes against the guide surface, causing the splicing protrusion 14 to retract into the receiving channel 131.

[0062] In other embodiments, the first elastic element 15 may also be an elastic rubber pad.

[0063] Specifically, the connecting frame 12 is elongated and extends along the first direction. The connecting groove 121 is through the first direction. The splicing block 13 is installed at one end of the opening of the connecting groove 121 and can be inserted into the other end of the opening of another connecting groove 121. The axis of the splicing hole 122 and the receiving channel 131 is parallel to the second direction, and the second direction is perpendicular to the first direction. The plate 11 is rectangular and has two connecting frames 12. The two connecting frames 12 are parallel to each other and spaced apart in the second direction, and are respectively laid on two sides of one side of the plate 11.

[0064] More specifically, the connecting frame 12 is also provided with a hoisting hole 123, which facilitates the hoisting and movement of the support plate assembly 1 by manpower or equipment.

[0065] In this embodiment, the axis of the hoisting hole 123 is parallel to the third direction and connects to the connecting groove 121. The first direction, the second direction and the third direction are perpendicular to each other.

[0066] Specifically, the connecting frame 12 is also provided with a pressure rod 124, one end of which is bent to form a pressure head. The pressure head can press the splicing protrusion 14 into the connecting groove 121 from the outside of the splicing hole 122. The above arrangement facilitates the disassembly of the two support plate assemblies 1.

[0067] More specifically, the pressure bar 124 is connected to the outer wall of the connecting frame 12 and can undergo elastic deformation. In the free state, the pressure head is located outside the splicing hole 122, and a pressure bar 124 is configured for each splicing hole 122.

[0068] In this embodiment, during actual use, the first direction is vertical. Depending on the depth of the foundation pit, multiple support plate assemblies 1 are assembled vertically using splicing blocks 13, splicing protrusions 14, and a first elastic element 15. During the insertion of the splicing block 13 into the connecting groove 121, the side wall of the connecting groove 121 presses the splicing protrusion 14 into the receiving channel 131. After the splicing block 13 is inserted into the connecting groove 121, the receiving channel 131 is aligned with the splicing holes 122 connecting both sides. The first elastic element 15 drives the two splicing protrusions 14 to pop out and respectively engage in the two splicing holes 122, thus achieving the connection between the two support plate assemblies 1. Compared with the existing connection methods that rely on bolt fastening or complex snap-fit ​​structures, the cooperation of the splicing block 13, splicing protrusion 14, and first elastic element 15 simplifies the installation and disassembly process, saves manpower and time, and effectively improves the overall construction efficiency.

[0069] More specifically, the driven shaft 22 is cylindrical, and internal threads are provided on the inner walls of both ends of the driven shaft 22, with the internal threads at both ends rotating in opposite directions. This arrangement allows the driven shaft 22 to drive the two supporting shafts 21 more stably.

[0070] Specifically, the supporting mechanism 2 also includes a connecting block 24 and a pin 25. The end of the supporting shaft 21 opposite to the driven shaft 22 is rotatably connected to the connecting block 24. The connecting block 24 has a connecting hole 241, and the connecting frame 12 has multiple locking holes 125. These locking holes 125 are spaced apart along a first direction and are connected to the connecting groove 121. When the connecting block 24 is placed in the connecting groove 121, the pin 25 can be inserted into the connecting hole 241 and any one of the locking holes 125, locking the connecting block 24 to the connecting frame 12. This configuration allows the supporting mechanism 2 to be more easily assembled and disassembled with the adjustment mechanism 3.

[0071] In this embodiment, when the connecting block 24 is locked to the connecting frame 12 by the pin 25, the rotation axis of the connecting block 24 relative to the support shaft 21 is parallel to the second direction, thereby enabling the support shaft 21 to adapt to the angle change of the pit sidewall.

[0072] In other embodiments, the driven shaft 22 may be a solid rod with external threads in opposite directions on the outer walls at both ends, and the supporting shaft 21 may be cylindrical with internal threads inside.

[0073] Specifically, both the driving element 33 and the driven element 23 are bevel gears. When the hook 34 is aligned and hooked onto the driven shaft 22, the driving element 33 meshes with the driven element 23. This arrangement makes the transmission between the driving element 33 and the driven element more stable and reliable.

[0074] More specifically, the drive shaft 32 includes a main shaft section 321, a second elastic element 322, and a sleeve 323. Two main shaft sections 321 are sleeved on the outside of the bearing shaft 31, with a drive element 33 fixed to each of the two opposing ends of the main shaft sections 321. The second elastic element 322 is sandwiched between the two main shaft sections 321. The sleeve 323 is sleeved on the outside of the two main shaft sections 321. A protrusion 3211 is provided on the outer wall of the main shaft section 321, and a guide groove 3231 is provided on the inner wall of the sleeve 323. The guide groove 3231 extends axially along the drive shaft 32, and the protrusion 3211 slides axially within the guide groove 3231. This arrangement, through the inclusion of the second elastic element 322, allows the position of the drive element 33 to be adaptively adjusted, facilitating a more convenient transmission connection to the driven element 23.

[0075] In this embodiment, the second elastic element 322 is a spring, sleeved on the outside of the bearing shaft 31. In other embodiments, the second elastic element 322 can also be an elastic washer.

[0076] Specifically, the hook 34 is U-shaped, and the second elastic element 322 drives the active element 33 to abut against the hook 34. The above arrangement allows the hook 34 to be more reliably mounted on the driven shaft 22. In addition, the hook 34 can also limit the active shaft 32 and the active element 33, preventing the active shaft 32 and the active element 33 from detaching from the bearing shaft 31.

[0077] More specifically, a limiting annular groove is provided on the outer wall of the driven shaft 22. When the hook 34 is hooked into the limiting annular groove, the driving member 33 is driven and connected to the driven member 23. The above arrangement makes the position of the hook 34 on the driven shaft 22 more stable and reliable, thereby supporting the stable and reliable transmission of the driving member 33 and the driven member 23.

[0078] In the support device of this utility model, based on the support plate assembly 1, the abutment mechanism 2 and the adjustment mechanism 3 cooperate to form a synchronous adjustment mechanism. The central drive shaft 32 drives the abutment shafts 21 on both sides to extend and retract synchronously. This solves the problem of uneven force distribution, easy deformation of the support plate or stress concentration caused by adjusting the abutment force on both sides separately in the existing support device. It achieves the technical effect of uniform force application and stable support to the side wall of the foundation pit, and effectively improves the safety and reliability of the support.

[0079] By setting up a connection mechanism that combines splicing block 13, splicing protrusion 14 and first elastic element 15, the problem of complex connection between multiple units and low installation and disassembly efficiency of existing support devices when dealing with deep foundation pits is solved. This achieves the technical effect of rapid and stable connection and separation between multiple support plate components 1, greatly improving construction efficiency and the modular application capability of the device.

[0080] By setting a main shaft section 321, a second elastic element 322, and a sleeve 323 that allow the active element 33 to quickly disengage from the driven element 23, the problem of the support rod of the existing support device interfering with the working area after adjustment and being difficult to dismantle is solved. This achieves the technical effect of being able to easily disassemble the adjustment mechanism 3 after the support is completed, freeing up the working space and enhancing the flexibility of construction.

[0081] By allowing two adjustment mechanisms 3 to be installed in the upper and lower positions, each adjustment mechanism 3 can simultaneously adjust two support mechanisms 2 set at intervals in the horizontal direction, the problem of traditional support devices being difficult to fit and effectively support the sidewalls of sloping foundation pits is solved. This achieves the technical effect of making the support plate assembly 1 tilt to adapt to foundation pits with different slopes, and significantly expands the applicable range of the support device.

[0082] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A support device, characterized in that, include: Support plate assembly (1); The supporting mechanism (2) includes a supporting shaft (21), a driven shaft (22) and a driven member (23). The supporting shaft (21) and the driven shaft (22) are coaxially arranged. Each end of the driven shaft (22) is screwed with a supporting shaft (21). The two supporting shafts (21) can be detachably connected to the two support plate assemblies (1) in a one-to-one correspondence. The driven member (23) is fixedly connected to the driven shaft (22). The adjustment mechanism (3) includes a bearing shaft (31), a drive shaft (32), a drive member (33), and hooks (34). Two hooks (34) are provided on the bearing shaft (31). The drive shaft (32) is sleeved on the outside of the bearing shaft (31). Two drive members (33) are fixed on the drive shaft (32). In one adjustment mechanism (3), the two hooks (34) are aligned and hooked one-to-one onto the driven shafts of the two supporting mechanisms (2). When 22), the two active members (33) are connected to the driven members (23) of the two supporting mechanisms (2) in a one-to-one transmission. When the active shaft (32) rotates, it can drive the two driven shafts (22) to rotate through the transmission of the active member (33) and the driven member (23). In one supporting mechanism (2), when the driven shaft (22) rotates relative to the two supporting shafts (21), it can drive the two supporting shafts (21) to move towards or away from each other.

2. The support device according to claim 1, characterized in that, The support plate assembly (1) includes: Plate(11); A connecting frame (12) is fixedly mounted on the plate (11). A connecting groove (121) is provided on the connecting frame (12). The connecting groove (121) extends along a first direction, which is parallel to the plate surface direction of the plate (11). The abutment shaft (21) can be adjusted to be connected to the connecting groove (121) along the first direction.

3. The support device according to claim 2, characterized in that, The support plate assembly (1) further includes: The splicing block (13) is connected to the connecting frame (12); A splicing protrusion (14) is connected to the splicing block (13). The connecting frame (12) is provided with a splicing hole (122) communicating with the connecting groove (121). The splicing block (13) of one support plate assembly (1) can be inserted into the connecting groove (121) of another support plate assembly (1) along the first direction. When the splicing block (13) is inserted into the connecting groove (121), the splicing protrusion (14) extends into the splicing hole (122).

4. The support device according to claim 3, characterized in that, The support plate assembly (1) further includes a first elastic element (15). A receiving channel (131) is provided through the splicing block (13). The first elastic element (15) is disposed in the receiving channel (131). Both ends of the first elastic element (15) are respectively connected to a splicing protrusion (14). One end of the splicing protrusion (14) extends into the receiving channel (131), and the other end extends out of the splicing block (13).

5. The support device according to claim 2, characterized in that, The supporting mechanism (2) also includes: Connecting block (24), the end of the supporting shaft (21) facing away from the driven shaft (22) is rotatably connected to the connecting block (24), and the connecting block (24) is provided with a connecting hole (241); The connecting frame (12) is provided with a plurality of locking holes (125), which are arranged sequentially at intervals along the first direction and are respectively connected to the connecting groove (121). When the connecting block (24) is placed in the connecting groove (121), the pin (25) can be inserted into the connecting hole (241) and any of the locking holes (125) to lock the connecting block (24) to the connecting frame (12).

6. The support device according to claim 1, characterized in that, The driven shaft (22) is cylindrical, and the inner walls at both ends of the driven shaft (22) are respectively provided with internal threads, and the internal threads at both ends of the driven shaft (22) rotate in opposite directions.

7. The support device according to claim 1, characterized in that, Both the driving member (33) and the driven member (23) are bevel gears. When the hook (34) is aligned and hooked onto the driven shaft (22), the driving member (33) engages with the driven member (23).

8. The support device according to claim 1, characterized in that, The drive shaft (32) includes: Two main shaft segments (321) are provided, which are sleeved on the outside of the bearing shaft (31). The two main shaft segments (321) are respectively fixed with an active member (33) at opposite ends. The second elastic element (322) is sandwiched between the two main shaft segments (321); A sleeve (323) is fitted on the outside of the two main shaft sections (321). On the outer wall of the main shaft section (321) and the inner wall of the sleeve (323), one is provided with a protrusion (3211) and the other is provided with a guide groove (3231). The guide groove (3231) extends along the axial direction of the drive shaft (32), and the protrusion (3211) is slidably disposed in the guide groove (3231) along the axial direction of the drive shaft (32).

9. The support device according to claim 8, characterized in that, The hook (34) is U-shaped, and the second elastic element (322) drives the active element (33) to abut against the hook (34).

10. The support device according to any one of claims 1-9, characterized in that, The outer wall of the driven shaft (22) is provided with a limiting ring groove. When the hook (34) is hooked in the limiting ring groove, the driving member (33) is connected to the driven member (23) in a transmission.

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