Highway bridge with earthquake resistance function and its shock absorption method

Abstract

The present invention discloses a highway bridge with earthquake resistance function and its shock absorption method. The highway bridge includes a cross beam. A circular groove is formed in the middle of the bottom surface of the cross beam. A support beam is arranged below the circular groove. An inner ring is arranged on the inner wall of the circular groove. A positioning rod is arranged at the center position of the top surface of the support beam. A circular sleeve is sleeved on the positioning rod. The circular sleeve is connected with the inner ring through a hinge mechanism. A plurality of rectangular blocks are evenly distributed on the outer side of the top surface of the support beam. A plurality of support rods are evenly distributed on the outer side of the inner wall of the circular groove. Each support rod is connected with the corresponding rectangular block through a clamping mechanism. A plurality of shock absorption rods are evenly distributed on the top of the outer side surface of the support beam. Each shock absorption rod is connected with the bottom wall of the cross beam through a shock absorption component. The present invention solves the problems of poor shock absorption performance and stability at the connection between the bridge bearing and the support column, and the overall structure design is compact. Under the combined action of each spring, the dynamic balance of the bridge is maintained, and its stability is further enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of highway bridge shock absorption, and particularly relates to a highway bridge with seismic resistance function and its shock absorption method. Background Art

[0002] A highway bridge generally refers to a structure erected on a highway to enable vehicles, pedestrians, etc. to pass smoothly. To adapt to the modern high-speed development of the transportation industry, a bridge is also extended to a building that is erected to cross mountain streams, poor geological conditions or meet other traffic needs to make passage more convenient.

[0003] Existing highway bridges have the following disadvantages: 1. There is a lack of effective stable connection at the joint between the bridge bearing and the support column. After long-term use of the bridge bearing, the bearing is prone to dislocation and deviation, which may further lead to the occurrence of bridge fracture; 2. The shock absorption effect at the joint between the bridge bearing and the support column is not good. In the case of vibrations such as earthquakes, it is prone to collapse and cause accidents. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages of poor shock absorption performance and stability at the joint between the bridge bearing and the support column in the prior art, and to propose a highway bridge with seismic resistance function.

[0005] In order to solve the problems of poor shock absorption performance and stability at the joint between the bridge bearing and the support column in the prior art, the present invention adopts the following technical solutions:

[0006] A highway bridge with seismic resistance function, including a cross beam. A circular groove is provided in the middle of the bottom surface of the cross beam. A support beam is provided below the circular groove. An inner ring is provided on the inner wall of the circular groove. A concentrically fixed outer ring is provided on the top surface of the support beam. A positioning rod is provided at the center position of the top surface of the support beam. A tension spring is sleeved on the positioning rod. A circular sleeve is sleeved on the top of the tension spring. The circular sleeve is connected to the inner ring through a hinge mechanism;

[0007] A number of rectangular blocks are evenly distributed on the outer side of the top surface of the support beam. A number of support rods are evenly distributed on the outer side of the inner wall of the circular groove. Each support rod is connected to the corresponding rectangular block through a clamping mechanism; A number of shock absorption rods are evenly distributed on the top of the outer side of the support beam. Each shock absorption rod is connected to the bottom wall of the cross beam through a shock absorption component.

[0008] Preferably, the hinge mechanism includes an L-shaped folding rod and a connecting rod. A plurality of U-shaped seats are evenly arranged in the middle of the inner wall of the outer ring. The middle part of each U-shaped seat is movably hinged to the middle part of the L-shaped folding rod through a pin shaft. An oval clamping block is arranged on the inner side of the top of each L-shaped folding rod. A plurality of oval pin holes are evenly formed in the bottom of the outer side of the inner ring. Each oval clamping block is fitted and clamped in the corresponding oval pin hole. A plurality of connecting rods are evenly arranged on the top of the outer side of the circular sleeve. The outer end of each connecting rod is movably hinged to the bottom end of the corresponding L-shaped folding rod.

[0009] Preferably, a load-bearing ring is sleeved on the bottom of the outer side of the circular sleeve. A load-bearing spring is sleeved on the outer side of the bottom of the tension spring. The top of the load-bearing spring is concentrically and fixedly connected to the bottom surface of the load-bearing ring. The bottom of the load-bearing spring is fixedly connected to the top surface of the support beam.

[0010] Preferably, a square sleeve is arranged on the top surface of the circular sleeve. A square load-bearing rod is arranged at the center of the inner wall of the circular groove. The bottom end of the square load-bearing rod slides through and is inserted into the square sleeve.

[0011] Preferably, the clamping mechanism includes a first inclined plate, a second inclined plate, and a trapezoidal clamping block. A Y-shaped groove is vertically formed in the middle of the top surface of the rectangular block. A first inclined plate is arranged on one side of the inner wall of the Y-shaped groove. A second inclined plate is arranged on the other side of the inner wall of the Y-shaped groove. Notches are formed on the opposite surfaces of the first inclined plate and the second inclined plate. Trapezoidal clamping blocks are arranged at the bottom ends of the support rods. The two bottom ends of each trapezoidal clamping block are fitted and clamped in the corresponding two notches.

[0012] Preferably, a limiting plate is arranged in the middle and lower part of the Y-shaped groove. An oval limiting hole is formed in the middle of the limiting plate. An inverted T-shaped pin that slides through is inserted into the oval limiting hole. The top end of the inverted T-shaped pin is fixedly connected to the bottom end of the second inclined plate. A clamping spring is sleeved on the upper half of the inverted T-shaped pin.

[0013] Preferably, positioning clamping blocks are arranged at the bottoms of the first inclined plates. Positioning card slots are formed on the opposite surfaces of the second inclined plates. The outer ends of the positioning clamping blocks are fitted and clamped in the corresponding positioning card slots.

[0014] Preferably, the damping assembly includes a sliding cylinder and a hinged rod. A sliding cylinder is sleeved in the middle of each damping rod. A plurality of embedded plates are evenly arranged on the bottom surface of the cross beam. A hinged rod is arranged on the bottom surface of each embedded plate. The bottom end of each hinged rod is movably hinged to the middle of the corresponding sliding cylinder.

[0015] Preferably, fixing blocks are arranged at both ends of the damping rod. Each fixing block is fixedly connected to the outer wall of the support beam. A damping spring is sleeved on the lower half of each damping rod.

[0016] The present invention also provides a shock absorption method for a highway bridge with earthquake resistance function, including the following steps:

[0017] Step 1: After the cross beam is installed on the top of the support beam, the gravity of the cross beam will drive the square load-bearing rod to move downward along the square sleeve, synchronously drive the circular sleeve to compress the tension spring downward along the positioning rod, and drive the load-bearing ring to compress the load-bearing spring downward;

[0018] Step 2: Through the hinged action of the connecting rod, the circular sleeve drives the middle part of the L-shaped folding rod to swing hingedly along the U-shaped seat, and synchronously drives a number of elliptical clamping blocks to be respectively clamped and engaged in the corresponding elliptical pin holes;

[0019] Step 3: At the same time, the cross beam will drive the support rod and the trapezoidal clamping block to move downward. The trapezoidal clamping block synchronously drives the first inclined plate and the second inclined plate to close relatively and slide downward along the Y-shaped groove, drives the positioning clamping block to be clamped and engaged in the corresponding positioning clamping groove, and drives the inverted T-shaped pin to compress the clamping spring downward along the elliptical limiting hole;

[0020] Step 4: At the same time, the cross beam will drive the embedded plate to move downward. Through the hinged action of the hinged rod, it drives the sliding cylinder to slide downward along the shock absorption rod and compress the shock absorption spring downward. Under the combined action of a number of shock absorption springs, clamping springs, load-bearing springs and tension springs, the dynamic balance of the cross beam relative to the support beam is maintained.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In the present invention, through the combined use of the clamping mechanism, the first inclined plate and the second inclined plate are closed relatively, so that the two ends of the trapezoidal clamping block can be more firmly clamped in the corresponding notches, increasing the stability of the clamping connection between the cross beam and the support beam;

[0023] 2. In the present invention, through the combined use of the hinged mechanism and the shock absorption assembly, the stability of the connection between the inner ring and the outer ring is increased. Under the combined action of a number of shock absorption springs, clamping springs, load-bearing springs and tension springs, the dynamic balance of the cross beam relative to the support beam is maintained;

[0024] In summary, the present invention solves the problems of poor shock absorption performance and stability at the connection between the bridge bearing and the support column, and the overall structure design is compact. Under the combined action of each spring, the dynamic balance of the bridge is maintained, further enhancing its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 Front view of the present invention;

[0027] Figure 2 Front sectional view of the present invention;

[0028] Figure 3 For the present invention Figure 2 Enlarged view at position A in;

[0029] Figure 4 Top view schematic diagram of the top surface of the support beam of the present invention;

[0030] Figure 5 Bottom view schematic diagram of the bottom surface of the cross beam of the present invention;

[0031] Figure 6 Schematic diagram of the shock absorption method of the present invention;

[0032] Reference numerals in the figure: cross beam 1, circular groove 11, inner ring 12, square load-bearing rod 13, square sleeve 14, L-shaped folding rod 15, elliptical clamping block 16, outer ring 2, positioning rod 21, tension spring 22, circular sleeve 23, load-bearing ring 24, load-bearing spring 25, connecting rod 26, embedded plate 3, articulated rod 31, shock-absorbing rod 32, fixing block 33, sliding cylinder 34, shock-absorbing spring 35, rectangular block 4, first inclined plate 41, second inclined plate 42, support rod 43, trapezoidal clamping block 44, positioning clamping block 45, limiting plate 46, inverted T-shaped pin 47, clamping spring 48, support beam 5. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] Embodiment 1: To further enhance the shock absorption performance and stability at the connection between the bridge bearing and the support column, this embodiment provides a highway bridge with seismic resistance function. Refer to Figures 1-5 , specifically, it includes a cross beam 1. A circular groove 11 is opened in the middle of the bottom surface of the cross beam 1. A support beam 5 is provided below the circular groove 11. The top of the support beam 5 is circular and flat. The inner wall of the circular groove 11 is fixedly connected with a concentric inner ring 12. The top surface of the support beam 5 is fixedly connected with a concentric outer ring 2, and the diameter of the outer ring 2 is greater than the diameter of the inner ring 12; a positioning rod 21 is provided at the center position of the top surface of the support beam 5. A tension spring 22 is sleeved on the positioning rod 21. The top of the tension spring 22 is sleeved with a circular sleeve 23, and the circular sleeve 23 is connected to the inner ring 12 through a hinge mechanism;

[0035] On the outer side of the top surface of the support beam 5, a number of rectangular blocks 4 arranged in a circular pattern are evenly distributed. On the outer side of the inner wall of the circular groove 11, a number of support rods 43 arranged in a circular pattern are evenly distributed. Each support rod 43 is connected to the corresponding rectangular block 4 through a clamping mechanism; on the top of the outer side surface of the support beam 5, a number of shock-absorbing rods 32 arranged in a circular pattern are evenly distributed. Each shock-absorbing rod 32 is connected to the bottom wall of the cross beam 1 through a shock-absorbing component.

[0036] In the specific implementation process, as Figure 2 shown, a load-bearing ring 24 is concentrically and fixedly sleeved on the bottom of the outer side surface of the circular sleeve 23. A load-bearing spring 25 is sleeved on the outer side of the bottom of the tension spring 22. The top of the load-bearing spring 25 is concentrically and fixedly connected to the bottom surface of the load-bearing ring 24. The bottom of the load-bearing spring 25 is fixedly connected to the top surface of the support beam 5; a square sleeve 14 is provided on the top surface of the circular sleeve 23. A square load-bearing rod 13 is vertically and fixedly provided at the center position of the inner wall of the circular groove 11. The bottom end of the square load-bearing rod 13 slides through and is inserted into the square sleeve 14; the cross beam 1 drives the embedded plate 3 to move downward. Through the hinge action of the hinge rod 31, the sliding cylinder 34 is driven to slide downward along the shock-absorbing rod 32 and compress the shock-absorbing spring 35 downward;

[0037] The hinge mechanism includes an L-shaped folding rod 15 and a connecting rod 26. A number of U-shaped seats arranged in a circular pattern are evenly distributed in the middle of the inner wall of the outer ring 2. The middle of each L-shaped folding rod 15 is movably hinged to the opening of each U-shaped seat through a pin shaft. An elliptical clamping block 16 is provided on the inner side of the top of each L-shaped folding rod 15. A number of elliptical pin holes arranged in a circular pattern are evenly opened on the bottom of the outer side surface of the inner ring 12. Each elliptical clamping block 16 is fitted and clamped in the corresponding elliptical pin hole. A number of connecting rods 26 that are arranged in a circular pattern and are movably hinged are evenly distributed on the top of the outer side surface of the circular sleeve 23. The outer end of each connecting rod 26 is movably hinged to the bottom end of the corresponding L-shaped folding rod 15; through the hinge action of the connecting rod 26, the circular sleeve 23 drives the middle of the L-shaped folding rod 15 to swing hingedly along the U-shaped seat, and synchronously drives a number of elliptical clamping blocks 16 to be fitted and clamped in the corresponding elliptical pin holes, increasing the connection stability between the inner ring 12 and the outer ring 2.

[0038] In the specific implementation process, as Figure 2As shown, the shock absorbing assembly includes a slide cylinder 34 and a hinge rod 31. The middle part of each shock absorbing rod 32 is sleeved with a slide cylinder 34 that is slidably connected. The bottom surface of the cross beam 1 is evenly distributed with a number of circularly arranged embedded plates 3. The bottom surface of each embedded plate 3 is provided with a movably hinged hinge rod 31. The bottom end of each hinge rod 31 is movably hinged with the middle part of the corresponding slide cylinder 34. Both ends of the shock absorbing rod 32 are provided with fixed blocks 33. Each fixed block 33 is fixedly connected to the outer wall of the support beam 5, and a shock absorbing spring 35 is sleeved on the lower half of each shock absorbing rod 32. The cross beam 1 will drive the embedded plate 3 to move downward, and through the hinged action of the hinge rod 31, it will drive the slide cylinder 34 to slide downward along the shock absorbing rod 32 and compress the shock absorbing spring 35 downward.

[0039] Embodiment 2: In embodiment 1, there is still the problem that the connection between the cross beam 1 and the support beam 5 is not firm. Therefore, based on embodiment 1, this embodiment further includes:

[0040] In the specific implementation process, Figure 2 and Figure 5 As shown, the locking mechanism includes a first inclined plate 41, a second inclined plate 42, and a trapezoidal clamping block 44. A Y-shaped groove is vertically opened in the middle of the top surface of the rectangular block 4, and a first inclined plate 41 is slidably connected on one side of the inner wall of the Y-shaped groove, and a second inclined plate 42 is slidably connected on the other side of the inner wall of the Y-shaped groove. Notches are opened on the opposite surfaces of the first inclined plate 41 and the second inclined plate 42, and a trapezoidal clamping block 44 is provided at the bottom end of the support rod 43. Both ends of the bottom of the trapezoidal clamping block 44 are engaged in the corresponding two notches; the gravity of the crossbeam 1 will drive the support rod 43 and the trapezoidal clamping block 44 to move downward, and the trapezoidal clamping block 44 will simultaneously drive the first inclined plate 41 and the second inclined plate 42 to relatively close and slide downward along the Y-shaped groove. By the relative closing of the first inclined plate 41 and the second inclined plate 42, the two ends of the trapezoidal clamping block 44 can be more tightly engaged in the corresponding notches, thereby increasing the stability of its locking connection;

[0041] A transversely fixed limit plate 46 is provided in the middle and lower part of the Y-shaped groove, an elliptical limit hole is provided in the middle part of the limit plate 46, an inverted T-shaped pin 47 slidingly passing through the inside of the elliptical limit hole is inserted, the top end of the inverted T-shaped pin 47 is fixed to the bottom end of the second inclined plate 42, and a locking spring 48 is sleeved on the upper half of the inverted T-shaped pin 47; wherein, a transversely fixed positioning block 45 is provided at the bottom of the first inclined plate 41, and a positioning slot is provided on the opposite surface of the second inclined plate 42, and the outer end of the positioning block 45 is engaged in the corresponding positioning slot; when the first inclined plate 41 and the second inclined plate 42 are relatively closed, the positioning block 45 will be driven to engage in the corresponding positioning slot, driving the inverted T-shaped pin 47 to compress the locking spring 48 downward along the elliptical limit hole, further improving the stability of the first inclined plate 41 and the second inclined plate 42 when they are closed.

[0042] Example 3: SeeFigure 6 Specifically, the working principle and operation method of the present invention are as follows:

[0043] Step 1: After the cross beam 1 is installed on the top of the support beam 5, the gravity of the cross beam 1 will drive the square load-bearing rod 13 to move downward along the square sleeve 14, synchronously driving the circular sleeve 23 to compress the tension spring 22 downward along the positioning rod 21, and driving the load-bearing ring 24 to compress the load-bearing spring 25 downward.

[0044] Step 2: Through the hinge action of the connecting rod 26, the circular sleeve 23 drives the middle part of the L-shaped folding rod 15 to swing hingedly along the U-shaped seat, synchronously driving a plurality of elliptical clamping blocks 16 to be respectively clamped and engaged in the corresponding elliptical pin holes.

[0045] Step 3: At the same time, the cross beam 1 will drive the support rod 43 and the trapezoidal clamping block 44 to move downward. The trapezoidal clamping block 44 synchronously drives the first inclined plate 41 and the second inclined plate 42 to close relative to each other and slide downward along the Y-shaped groove, driving the positioning clamping block 45 to be clamped and engaged in the corresponding positioning slot, and driving the inverted T-shaped pin 47 to compress the clamping spring 48 downward along the elliptical limiting hole.

[0046] Step 4: At the same time, the cross beam 1 will drive the embedded plate 3 to move downward. Through the hinge action of the hinge rod 31, it drives the sliding cylinder 34 to slide downward along the shock-absorbing rod 32, and compress the shock-absorbing spring 35 downward. Under the combined action of a plurality of shock-absorbing springs 35, clamping springs 48, load-bearing springs 25, and tension springs 22, the dynamic balance of the cross beam 1 relative to the support beam 5 is maintained.

[0047] The present invention solves the problems of poor shock-absorbing performance and stability at the connection between the bridge bearing and the support column. Moreover, the overall structure is designed compactly. Under the combined action of various springs, the dynamic balance of the bridge is maintained, further enhancing its stability.

[0048] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A highway bridge with earthquake resistance function, including a cross beam (1), characterized in that: A circular groove (11) is provided in the middle of the bottom surface of the cross beam (1). A support beam (5) is provided below the circular groove (11). An inner ring (12) is provided on the inner wall of the circular groove (11). A concentrically fixed outer ring (2) is provided on the top surface of the support beam (5). A positioning rod (21) is provided at the center position of the top surface of the support beam (5). A tension spring (22) is sleeved on the positioning rod (21). A circular sleeve (23) is sleeved on the top of the tension spring (22). The circular sleeve (23) is connected to the inner ring (12) through a hinge mechanism. A number of rectangular blocks (4) are evenly distributed on the outer side of the top surface of the support beam (5). A number of support rods (43) are evenly distributed on the outer side of the inner wall of the circular groove (11). Each support rod (43) is connected to the corresponding rectangular block (4) through a clamping mechanism. A number of shock-absorbing rods (32) are evenly distributed on the top of the outer side surface of the support beam (5). Each shock-absorbing rod (32) is connected to the bottom wall of the cross beam (1) through a shock-absorbing component. The hinge mechanism includes an L-shaped folding rod (15) and a connecting rod (26). A number of U-shaped seats are evenly distributed in the middle of the inner wall of the outer ring (2). The middle part of each U-shaped seat is movably hinged to the middle part of the L-shaped folding rod (15) through a pin shaft. An elliptical clamping block (16) is provided on the inner side of the top of each L-shaped folding rod (15). A number of elliptical pin holes are evenly distributed on the bottom of the outer side surface of the inner ring (12). Each elliptical clamping block (16) is fitted and clamped in the corresponding elliptical pin hole. A number of connecting rods (26) are evenly distributed on the top of the outer side surface of the circular sleeve (23). The outer end of each connecting rod (26) is movably hinged to the bottom end of the corresponding L-shaped folding rod (15). The clamping mechanism includes a first inclined plate (41), a second inclined plate (42), and a trapezoidal clamping block (44). A Y-shaped groove is vertically provided in the middle of the top surface of the rectangular block (4). A first inclined plate (41) is provided on one side of the inner wall of the Y-shaped groove. A second inclined plate (42) is provided on the other side of the inner wall of the Y-shaped groove. Notches are provided on the opposite surfaces of the first inclined plate (41) and the second inclined plate (42). Trapezoidal clamping blocks (44) are provided at the bottom ends of the support rods (43). The two bottom ends of each trapezoidal clamping block (44) are fitted and clamped in the corresponding two notches.

2. The highway bridge with earthquake resistance function according to claim 1, wherein: A load-bearing ring (24) is sleeved on the bottom of the outer side surface of the circular sleeve (23). A load-bearing spring (25) is sleeved on the outer side of the bottom of the tension spring (22). The top of the load-bearing spring (25) is concentrically fixed to the bottom surface of the load-bearing ring (24). The bottom of the load-bearing spring (25) is fixed to the top surface of the support beam (5).

3. The highway bridge with earthquake resistance function according to claim 1, characterized in that: A square sleeve (14) is provided on the top surface of the circular sleeve (23). A square load-bearing rod (13) is provided at the center position of the inner wall of the circular groove (11). The bottom end of the square load-bearing rod (13) slides through and is inserted into the square sleeve (14).

4. The highway bridge with earthquake resistance function according to claim 1, characterized in that: A limiting plate (46) is provided in the middle and lower part of the Y-shaped groove. An elliptical limiting hole is formed in the middle of the limiting plate (46). A reversely T-shaped pin (47) that slides through is inserted into the elliptical limiting hole. The top end of the reversely T-shaped pin (47) is fixedly connected to the bottom end of the second inclined plate (42), and a clamping spring (48) is sleeved on the upper half of the reversely T-shaped pin (47).

5. The highway bridge with earthquake resistance function according to claim 1, wherein: Positioning blocks (45) are provided at the bottom of the first inclined plate (41). Positioning card slots are formed on the opposite surfaces of the second inclined plate (42). The outer ends of the positioning blocks (45) are fitted and clamped in the corresponding positioning card slots.

6. The highway bridge with earthquake resistance function according to claim 1, wherein: The shock absorption assembly includes a sliding cylinder (34) and a hinged rod (31). A sliding cylinder (34) is sleeved in the middle of each shock absorption rod (32). A plurality of embedded plates (3) are evenly distributed on the bottom surface of the cross beam (1). A hinged rod (31) is provided at the bottom surface of each embedded plate (3). The bottom end of each hinged rod (31) is movably hinged to the middle of the corresponding sliding cylinder (34).

7. The highway bridge with earthquake resistance function according to claim 6, characterized in that: Fixed blocks (33) are provided at both ends of the shock absorption rod (32). Each fixed block (33) is fixedly connected to the outer wall of the support beam (5), and a shock absorption spring (35) is sleeved on the lower half of each shock absorption rod (32).

8. The shock absorption method for a highway bridge with earthquake resistance function according to any one of claims 1-7, characterized in that, It includes the following steps: Step 1, after the cross beam (1) is installed on the top of the support beam (5), the gravity of the cross beam (1) will drive the square load-bearing rod (13) to move downward along the square sleeve (14), synchronously drive the circular sleeve (23) to compress the tension spring (22) downward along the positioning rod (21), and drive the load-bearing ring (24) to compress the load-bearing spring (25) downward; Step 2, through the hinged action of the connecting rod (26), the circular sleeve (23) drives the middle part of the L-shaped folding rod (15) to swing hingedly along the U-shaped seat, and synchronously drives a plurality of elliptical clamping blocks (16) to be respectively fitted and clamped in the corresponding elliptical pin holes; Step 3, at the same time, the cross beam (1) will drive the support rod (43) and the trapezoidal clamping block (44) to move downward. The trapezoidal clamping block (44) synchronously drives the first inclined plate (41) and the second inclined plate (42) to close relatively and slide downward along the Y-shaped groove, drives the positioning block (45) to be fitted and clamped in the corresponding positioning card slot, and drives the reversely T-shaped pin (47) to compress the clamping spring (48) downward along the elliptical limiting hole; Step 4, at the same time, the cross beam (1) will drive the embedded plate (3) to move downward. Through the hinged action of the hinged rod (31), it drives the sliding cylinder (34) to slide downward along the shock absorption rod (32) and compress the shock absorption spring (35) downward. Under the combined action of a plurality of shock absorption springs (35), clamping springs (48), load-bearing springs (25), and tension springs (22), the dynamic balance of the cross beam (1) relative to the support beam (5) is maintained.

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