Overload protection device for a building corner

Abstract

The application relates to the technical field of building construction, in particular to an overload protection device for a building corner piece. The application provides an overload protection device for a building corner piece which can be conveniently operated and used and can perform overall buffering protection. The overload protection device for the building corner piece comprises universal wheels, a mounting plate, a supporting plate and a damping mechanism, universal wheels are rotatably connected to the four corners of the bottom of the mounting plate, the top of the mounting plate is connected with the supporting plate, and the supporting plate is provided with the damping mechanism. The first connecting frame is controlled to move, then the first sliding frame is automatically adjusted to slide by the adjusting assembly, different building internal heights are quickly adapted, then the building corner piece is clamped and stabilized by the clamping assembly, the stability of the building corner piece is improved, the damping assembly is used for comprehensively buffering and protecting the building corner piece during the construction process, the convenience of operation is improved, and the building corner piece is prevented from being damaged due to overload.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to an overload protection device for building corner components. Background Technology

[0002] Architectural corner fittings are special accessories used to connect and fix various components in a building structure. Made of metal, they are characterized by high strength and durability. Architectural corner fittings play a connecting and reinforcing role in the building structure. During use, to prevent corner fittings from being damaged by excessive loads, which could lead to instability of the overall building structure, overload protection devices are generally used to protect the corner fittings. Existing devices typically enhance the stability and support capacity of the corner fittings by directly installing protective components, reducing the load on the corner fittings. However, these protective components are inconvenient to install and offer limited protection, lacking comprehensive protection for the entire corner fitting, thus reducing the overall protective effect.

[0003] Therefore, in order to address the above problems, we are now developing an overload protection device for building corner components that is easy to operate and use, while also providing overall buffer protection. Summary of the Invention

[0004] To overcome the shortcomings of existing devices, such as inconvenience during installation, limited protection range for building corner components, and lack of overall protection for building corner components, which leads to reduced protection effectiveness, this invention provides an overload protection device for building corner components that is easy to operate and use, and can provide overall buffer protection.

[0005] The technical implementation scheme of the present invention is as follows: an overload protection device for building corner fittings, comprising casters, a mounting plate, a support plate, and a shock-absorbing mechanism. Casters are rotatably connected to the four corners of the bottom of the mounting plate. A support plate is connected to the top of the mounting plate. A shock-absorbing mechanism is provided on the support plate. The shock-absorbing mechanism includes a sliding block, a first connecting frame, a first sliding frame, an adjustment component, a fixing plate, a first connecting seat, a shock-absorbing component, a second connecting seat, and a clamping component. A sliding block is slidably connected to the support plate. A first connecting frame is connected to the rear side of the sliding block. A first sliding frame is slidably connected to the first connecting frame. An adjustment component is connected between the first connecting frame and the first sliding frame. A fixing plate is bolted to the front side of the first sliding frame. Six first connecting seats are evenly connected to the bottom of the fixing plate. A shock-absorbing component is rotatably connected to each first connecting seat. A second connecting seat is rotatably connected to the lower part of each shock-absorbing component. A clamping component is connected to the bottom of each second connecting seat.

[0006] More preferably, it also includes a connecting mechanism, which includes a mounting frame, a multi-stage hydraulic cylinder, a second connecting frame, a connecting frame, and a locking assembly. The mounting frame is connected to the top of the support plate. Multi-stage hydraulic cylinders are connected to both the left and right sides of the mounting frame. The second connecting frame is connected to the telescopic rod of the multi-stage hydraulic cylinder. The second connecting frame is rotatably connected to two connecting frames, and the top of the adjacent connecting frames is connected to a locking assembly.

[0007] More preferably, it also includes a synchronous adjustment mechanism, which includes connectors, spur gears, rack frames, guide frames, and third connecting frames. Six connectors are connected to the bottom of the fixed plate, and each connector is rotatably connected to a spur gear. Each spur gear is connected to an adjacent shock-absorbing component. Four guide frames are connected to the bottom of the fixed plate, and rack frames that mesh with the spur gears are slidably connected between adjacent guide frames. Third connecting frames are connected to both the left and right sides of the rack frames, and each third connecting frame is connected to an adjacent multi-stage hydraulic cylinder telescopic rod.

[0008] More preferably, it also includes a supporting mechanism, which includes a fixing member, a two-way screw rod and a sliding plate. The non-adjacent sides of the connecting frame are each connected to a symmetrical fixing member. The upper and lower adjacent fixing members are rotatably connected to a two-way screw rod. The connecting frame is slidably connected to a sliding plate, and the sliding plate is threadedly connected to the adjacent two-way screw rod.

[0009] More preferably, it also includes a reinforcement mechanism, which includes a fixed base, a rotating frame, and a second sliding frame. The fixed base is bolted to the front of the sliding block, the rotating frame is rotatably connected to the front of the fixed base, and the second sliding frame is slidably connected to the rotating frame.

[0010] More preferably, it also includes a lifting mechanism, which includes a servo motor, a bevel gear set and a threaded rod. The servo motor is bolted to the upper rear side of the mounting plate, and the threaded rod is rotatably connected to the upper rear side of the mounting plate. The threaded rod is threadedly connected to the first connecting frame, and the bevel gear set is connected between the output shaft of the servo motor and the threaded rod.

[0011] More preferably, multiple ribs are connected between the support plate and the mounting plate to improve the stability of the support.

[0012] More preferably, the adjustment assembly includes a lifting screw, a drive motor, and a connecting frame. The drive motor is connected to the upper front side of the first connecting frame, the lifting screw is connected to the output shaft of the drive motor, the connecting frame is threadedly connected to the lifting screw, and the connecting frame is connected to the first sliding frame.

[0013] More preferably, the shock absorption components all include connecting blocks, telescopic rods and buffers. Connecting blocks are rotatably connected to the first connecting seat, telescopic rods are connected to the connecting blocks, connecting blocks are connected between the lower parts of the telescopic rods, and buffers are connected between adjacent connecting blocks.

[0014] More preferably, the clamping assembly includes a fixing member, a clamping plate, and an adjusting screw. The bottom of each second connecting seat is rotatably connected to a fixing member, and the fixing member is slidably connected to a clamping plate. The left side of each fixing member is rotatably connected to an adjusting screw, and the adjusting screw is threadedly connected to the adjacent clamping plate.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention controls the movement of the first connecting frame, and then controls the first sliding frame to automatically slide and adjust through the adjustment component, so as to quickly adapt to different building interior heights. Then, the clamping component clamps and stabilizes the building corner pieces, thereby improving the stability of the building corner pieces. During the construction process, the shock absorption component provides more comprehensive buffer protection for the building corner pieces, improving the convenience of operation and avoiding overload damage to the building corner pieces.

[0016] 2. This invention controls the second connecting frame to move rapidly by using a multi-stage hydraulic cylinder telescopic rod. Then, the connecting frame surrounds and limits the lower part of the building corner piece, and a locking component is used to lock and fix the connecting frame, thereby further improving the stability of the building corner piece and enhancing the protection effect.

[0017] 3. This invention uses a multi-stage hydraulic cylinder telescopic rod to drive the third connecting frame to move, thereby causing the rack frame to drive the adjacent spur gear to rotate, which in turn causes the shock absorption components to rotate synchronously, adapting to building corner pieces of different specifications and lengths, achieving the effect of synchronous adjustment, and improving the convenience of operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the shock absorption mechanism of the present invention.

[0021] Figure 4 This is a schematic diagram of the shock absorption mechanism of the present invention.

[0022] Figure 5 This is a partial three-dimensional structural diagram of the shock absorption mechanism of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the connecting mechanism of the present invention.

[0024] Figure 7 This is a schematic diagram of the synchronous adjustment mechanism of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the supporting mechanism of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the reinforcement mechanism of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the lifting mechanism of the present invention.

[0028] The components in the attached diagram are labeled as follows: 1. Caster wheel, 2. Mounting plate, 3. Support plate, 4. Shock absorption mechanism, 41. Sliding block, 42. First connecting frame, 43. First sliding frame, 44. Adjustment component, 45. Fixing plate, 46. First connecting seat, 47. Shock absorption component, 48. Second connecting seat, 49. Clamping component, 5. Connecting mechanism, 51. Mounting frame, 52. Multi-stage hydraulic cylinder, 53. Second connecting frame, 54. Connecting frame, 55. Locking component, 6. Synchronous adjustment mechanism, 61. Connecting piece, 62. Spur gear, 63. Rack frame, 64. Guide frame, 65. Third connecting frame, 7. Support mechanism, 71. Fixing piece, 72. Two-way lead screw, 73. Sliding plate, 8. Reinforcing mechanism, 81. Fixing seat, 82. Rotating frame, 83. Second sliding frame, 9. Lifting mechanism, 91. Servo motor, 92. Bevel gear set, 93. Threaded rod. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] An overload protection device for building corner fittings, such as Figure 1 and Figure 2 As shown, it includes casters 1, mounting plate 2, support plate 3 and shock absorption mechanism 4. Casters 1 are rotatably connected to the four corners of the bottom of the mounting plate 2. The support plate 3 is connected to the top of the mounting plate 2. Multiple ribs are connected between the support plate 3 and the mounting plate 2 to improve the stability of the support. The support plate 3 is provided with shock absorption mechanism 4 to dampen the corner of the building and prevent overload damage.

[0031] It should be noted that during construction, in order to prevent excessive pressure on the corner components and cause overload damage, this device can be used to buffer and protect the corner components. By pushing the device, the caster 1 drives the mounting plate 2 to move, thereby moving the device to the designated position. Then, the shock-absorbing mechanism 4 is adjusted to connect with the corner component. During construction, the shock-absorbing mechanism 4 provides shock absorption and buffering protection for the corner component, reducing the pressure on the corner component.

[0032] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the shock absorption mechanism 4 includes a sliding block 41, a first connecting frame 42, a first sliding frame 43, an adjusting component 44, a fixing plate 45, a first connecting seat 46, a shock absorption component 47, a second connecting seat 48, and a clamping component 49. The sliding block 41 is slidably connected to the support plate 3. The first connecting frame 42 is connected to the rear side of the sliding block 41. The first sliding frame 43 is slidably connected to the first connecting frame 42. An adjusting component 44 is connected between the first connecting frame 42 and the first sliding frame 43. The adjusting component 44 includes a lifting screw, a drive motor, and a connecting frame. The drive motor is connected to the upper front side of the first connecting frame 42. The lifting screw is connected to the output shaft of the drive motor. The connecting frame is threaded onto the lifting screw. The connecting frame is connected to the first sliding frame 43. A fixing plate 45 for connection to the building's interior ceiling is bolted to the front side of the first sliding frame 43. The bottom of the fixing plate 45 is evenly connected to six first connecting seats 46. Each first connecting seat 46 is rotatably connected to a shock-absorbing component 47. Each shock-absorbing component 47 includes a connecting block, a telescopic rod, and a buffer. Each first connecting seat 46 is rotatably connected to a connecting block. Each connecting block is connected to a telescopic rod. Each telescopic rod is connected to a connecting block at its lower part. Each adjacent connecting block is connected to a buffer. Each shock-absorbing component 47 is rotatably connected to a second connecting seat 48. Each second connecting seat 48 is connected to a clamping component 49 for clamping and fixing the building corner piece. Each clamping component 49 includes a fixing member, a clamping plate, and an adjusting screw. Each second connecting seat 48 is rotatably connected to a fixing member. Each fixing member is slidably connected to a clamping plate. Each fixing member is rotatably connected to an adjusting screw on its left side. Each adjusting screw is threadedly connected to an adjacent clamping plate.

[0033] It should be noted that when cushioning and protecting the building corner pieces, the first sliding frame 43 needs to be adjusted according to the building's internal height. First, the sliding block 41 slides along the support plate 3, causing the first connecting frame 42 to move upwards. Then, the adjusting component 44 is activated, causing the first sliding frame 43 to slide upwards along the first connecting frame 42, allowing the fixing plate 45 to contact the building's interior ceiling. The fixing plate 45 is then fixed in place with bolts. Next, based on the position of the building corner piece, the clamping component 49 is controlled to clamp and connect it. During this process, both the first connecting seat 46 and the second connecting seat 48 are rotated by the shock-absorbing component 47, completing the clamping process. After connection, the stability of the building corner bracket is improved. It should be noted that during subsequent construction, the shock-absorbing component 47 can buffer the pressure on the building corner bracket, preventing overload damage and improving the support stability and safety of the building corner bracket. In summary, by controlling the movement of the first connecting frame 42, and then controlling the automatic sliding adjustment of the first sliding frame 43 through the adjusting component 44, different building interior heights can be quickly adapted. Then, the clamping component 49 clamps and stabilizes the building corner bracket, improving its stability. During construction, the shock-absorbing component 47 buffers and protects the building corner bracket, improving the convenience of operation and preventing overload damage.

[0034] like Figure 1 and Figure 6 As shown, it also includes a connecting mechanism 5, which includes a mounting frame 51, a multi-stage hydraulic cylinder 52, a second connecting frame 53, a connecting frame 54, and a locking assembly 55. The top of the support plate 3 is connected to the mounting frame 51. The left and right sides of the mounting frame 51 are connected to the multi-stage hydraulic cylinder 52. The telescopic rods of the multi-stage hydraulic cylinder 52 are connected to the second connecting frame 53. The second connecting frame 53 is rotatably connected to two connecting frames 54 for limiting and stabilizing the corner pieces of the building. The tops of adjacent connecting frames 54 are connected to a locking assembly 55 for locking and fixing.

[0035] It should be noted that when providing overload protection for building corner components, the locking component 55 can be unlocked, allowing all connecting frames 54 to flip open. Then, the multi-stage hydraulic cylinder 52 is activated, causing its telescopic rod to move adjacent second connecting frames 53 to opposite sides, thus adapting to building corner components of different lengths. This allows the second connecting frames 53 to move to positions near the edges on both sides of the building corner component. Afterward, the connecting frames 54 are flipped back to their original positions, allowing them to surround and limit the building corner component. Finally, the locking component 55 is controlled to lock and fix the adjacent connecting frames 54. In summary, by controlling the telescopic rod of the multi-stage hydraulic cylinder 52 to move the second connecting frames 53 rapidly, the connecting frames 54 surround and limit the lower part of the building corner component, and the locking component 55 is used to lock and fix the connecting frames 54, the stability of the building corner component is further improved, enhancing the protection effect.

[0036] like Figure 1 and Figure 7 As shown, it also includes a synchronous adjustment mechanism 6, which includes a connector 61, a spur gear 62, a rack frame 63, a guide frame 64, and a third connecting frame 65. Six connectors 61 are connected to the bottom of the fixed plate 45, and a spur gear 62 is rotatably connected to each connector 61. The spur gear 62 is connected to the adjacent shock absorption assembly 47. Four guide frames 64 are connected to the bottom of the fixed plate 45. A rack frame 63 that meshes with the spur gear 62 is slidably connected between adjacent guide frames 64. The rack frame 63 is connected to the left and right sides of the left and right sides, and the third connecting frame 65 is connected to the telescopic rod of the adjacent multi-stage hydraulic cylinder 52.

[0037] It should be noted that when adjusting the second connecting frame 53 using the telescopic rod of the multi-stage hydraulic cylinder 52, the movement of the telescopic rod of the multi-stage hydraulic cylinder 52 will drive the third connecting frame 65 to move synchronously, thereby causing the rack frame 63 to slide along the guide frame 64, which in turn causes the adjacent spur gears 62 to start rotating, and thus causes the shock-absorbing components 47 to rotate accordingly, achieving the effect of synchronous adjustment. In summary, by using the telescopic rod of the multi-stage hydraulic cylinder 52 to drive the third connecting frame 65 to move, the rack frame 63 will drive the adjacent spur gears 62 to rotate, thereby causing the shock-absorbing components 47 to rotate synchronously, adapting to building corner pieces of different specifications and lengths, achieving the effect of synchronous adjustment, and improving the convenience of operation.

[0038] like Figure 1 and Figure 8As shown, it also includes a support mechanism. The support mechanism 7 includes a fixing member 71, a two-way screw rod 72 and a sliding plate 73. The non-adjacent sides of the connecting frame 54 are all connected to the upper and lower symmetrical fixing members 71. The upper and lower adjacent fixing members 71 are rotatably connected to the two-way screw rod 72. The connecting frame 54 is slidably connected to the sliding plate 73 for supporting the building corner members. The sliding plate 73 is threadedly connected to the adjacent two-way screw rod 72.

[0039] It should be noted that after the corner piece is surrounded and limited by the connecting frame 54, the bidirectional screw 72 can be rotated to allow the sliding plates 73 to slide and unfold along the connecting frame 54 to the opposite side. This allows the sliding plates 73 to support and push against the interior of the corner piece, further improving the limiting effect on the corner piece. In summary, by rotating the bidirectional screw 72, the sliding plates 73 slide along the connecting frame 54, thereby cooperating with the connecting frame 54 to support the corner piece and further improve its stability.

[0040] like Figure 1 and Figure 9 As shown, it also includes a reinforcement mechanism 8, which includes a fixed base 81, a rotating frame 82, and a second sliding frame 83. The fixed base 81 is bolted to the front side of the sliding block 41, and the rotating frame 82 is rotatably connected to the front side of the fixed base 81. The second sliding frame 83, which is engaged with the fixed plate 45, is slidably connected to the rotating frame 82.

[0041] It should be noted that, in order to further improve the stability of the device and prevent the fixed plate 45 from tilting backward during the upward process, the rear side of the fixed plate 45 is locked and stabilized by the cooperation between the rotating frame 82 and the second sliding frame 83, so that the fixed plate 45 can rise stably and improve the operational stability and safety of the device.

[0042] like Figure 1 and Figure 10 As shown, it also includes a lifting mechanism 9, which includes a servo motor 91, a bevel gear set 92 and a threaded rod 93. The servo motor 91 is bolted to the upper rear side of the mounting plate 2, and the threaded rod 93 is rotatably connected to the upper rear side of the mounting plate 2. The threaded rod 93 is threadedly connected to the first connecting frame 42. The threaded rod 93 is located to the left of the servo motor 91, and the bevel gear set 92 is connected between the output shaft of the servo motor 91 and the threaded rod 93.

[0043] It should be noted that when it is necessary to adjust the vertical height of the first connecting frame 42, the servo motor 91 can be started directly, so that the output shaft of the servo motor 91 drives the bevel gear set 92 to rotate, thereby causing the threaded rod 93 to start rotating, which in turn drives the first connecting frame 42 to automatically adjust its movement, thus improving the operating efficiency.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An overload protection device for a building corner component, comprising casters (1), a mounting plate (2), a support plate (3), and a shock-absorbing mechanism (4), wherein casters (1) are rotatably connected to the four corners of the bottom of the mounting plate (2), the support plate (3) is connected to the top of the mounting plate (2), and the shock-absorbing mechanism (4) is provided on the support plate (3), characterized in that, The shock absorption mechanism (4) includes a sliding block (41), a first connecting frame (42), a first sliding frame (43), an adjustment component (44), a fixed plate (45), a first connecting seat (46), a shock absorption component (47), a second connecting seat (48), and a clamping component (49). The sliding block (41) is slidably connected to the support plate (3). The first connecting frame (42) is connected to the rear side of the sliding block (41). The first sliding frame (43) is slidably connected to the first connecting frame (42). The adjustment component (44) is connected between the first connecting frame (42) and the first sliding frame (43). The fixed plate (45) is bolted to the front side of the first sliding frame (43). Six first connecting seats (46) are evenly connected to the bottom of the fixed plate (45). The shock absorption component (47) is rotatably connected to the first connecting seat (46). The second connecting seat (48) is rotatably connected to the lower part of the shock absorption component (47). The clamping component (49) is connected to the bottom of the second connecting seat (48).

2. An overload protection device for a building corner component according to claim 1, characterized in that, It also includes a connecting mechanism (5), which includes a mounting frame (51), a multi-stage hydraulic cylinder (52), a second connecting frame (53), a connecting frame (54), and a locking assembly (55). The top of the support plate (3) is connected to the mounting frame (51), and the left and right sides of the mounting frame (51) are connected to the multi-stage hydraulic cylinder (52). The telescopic rods of the multi-stage hydraulic cylinder (52) are connected to the second connecting frame (53), and the second connecting frame (53) is rotatably connected to the front and rear connecting frames (54). The tops of the adjacent connecting frames (54) are connected to the locking assembly (55).

3. An overload protection device for a building corner component according to claim 2, characterized in that, It also includes a synchronous adjustment mechanism (6), which includes a connector (61), a spur gear (62), a rack frame (63), a guide frame (64), and a third connecting frame (65). The bottom of the fixed plate (45) is connected to six connectors (61), each connector (61) is rotatably connected to a spur gear (62), each spur gear (62) is connected to an adjacent shock-absorbing component (47), the bottom of the fixed plate (45) is connected to four guide frames (64), each adjacent guide frame (64) is slidably connected to a rack frame (63) that meshes with the spur gear (62), each rack frame (63) is connected to the left and right sides of the rack frame (63), and each third connecting frame (65) is connected to the telescopic rod of an adjacent multi-stage hydraulic cylinder (52).

4. An overload protection device for a building corner component according to claim 3, characterized in that, It also includes a support mechanism. The support mechanism (7) includes a fixing member (71), a two-way screw rod (72) and a sliding plate (73). The non-adjacent sides of the connecting frame (54) are connected to symmetrical fixing members (71). The two-way screw rod (72) is rotatably connected between the upper and lower adjacent fixing members (71). The sliding plate (73) is slidably connected to the connecting frame (54). The sliding plate (73) is threadedly connected to the adjacent two-way screw rod (72).

5. An overload protection device for a building corner component according to claim 4, characterized in that, It also includes a reinforcement mechanism (8), which includes a fixed seat (81), a rotating frame (82) and a second sliding frame (83). The front side of the sliding block (41) is connected to the fixed seat (81) by bolts. The front side of the fixed seat (81) is rotatably connected to the rotating frame (82). The rotating frame (82) is slidably connected to the rotating frame (82). The second sliding frame (83) is snapped into the fixed plate (45) to provide auxiliary support for the fixed plate (45).

6. An overload protection device for a building corner component according to claim 5, characterized in that, It also includes a lifting mechanism (9), which includes a servo motor (91), a bevel gear set (92) and a threaded rod (93). The servo motor (91) is bolted to the upper rear side of the mounting plate (2), and the threaded rod (93) is rotatably connected to the upper rear side of the mounting plate (2). The threaded rod (93) is threadedly connected to the first connecting frame (42), and the bevel gear set (92) is connected between the output shaft of the servo motor (91) and the threaded rod (93).

7. An overload protection device for a building corner component according to claim 1, characterized in that, Multiple ribs are connected between the support plate (3) and the mounting plate (2) to improve the stability of the support.

8. An overload protection device for a building corner component according to claim 1, characterized in that, The adjustment assembly (44) includes a lifting screw, a drive motor and a connecting frame. The drive motor is connected to the upper front side of the first connecting frame (42). The lifting screw is connected to the output shaft of the drive motor. The connecting frame is threadedly connected to the lifting screw. The connecting frame is connected to the first sliding frame (43).

9. An overload protection device for a building corner component according to claim 1, characterized in that, Each shock absorber assembly (47) includes a connecting block, a telescopic rod, and a buffer. A connecting block is rotatably connected to each of the first connecting seats (46), and a telescopic rod is connected to each of the connecting blocks. Another connecting block is connected between the lower parts of the telescopic rods, and a buffer is connected between the two connecting blocks.

10. An overload protection device for a building corner component according to claim 1, characterized in that, The clamping assembly (49) includes a fixing member, a clamping plate and an adjusting screw. The bottom of the second connecting seat (48) is rotatably connected to the fixing member, and the clamping plate is slidably connected to the fixing member. The left side of the fixing member is rotatably connected to the adjusting screw, and the adjusting screw is threadedly connected to the adjacent clamping plate.

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