A splicing, clamping and locking mechanism for a steel structure bridge and its clamping method

Abstract

The present invention discloses a splicing, clamping and locking mechanism for a steel structure bridge and its clamping method, which includes a cross beam. Below the bottom surface of the cross beam, there is a fixed disk. A number of rectangular grooves are opened on the top surface of the fixed disk. A number of U-shaped plates are provided on the bottom surface of the cross beam. Each U-shaped plate is connected to the corresponding rectangular groove through a meshing mechanism; an outer edge of the bottom surface of the fixed disk is provided with a thickened sleeve. Below the thickened sleeve, there is a support beam. A circular groove is opened on the top surface of the support beam. The bottom of the thickened sleeve extends into the circular groove, and the outer wall of the thickened sleeve is slidably connected to the inner wall of the circular groove. The thickened sleeve is connected to the circular groove through a clamping mechanism. The present invention solves the problem that the splicing between the cross beam and the support beam of the steel structure bridge is not firm and lacks shock absorption performance. Moreover, the overall structure design is compact. Through the combined use of various mechanisms, the stability of the splicing and clamping between the cross beam and the support beam is increased, and its shock absorption performance is also improved, further prolonging the service life of the steel structure bridge.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure bridges, and particularly relates to a splicing, clamping and locking mechanism for a steel structure bridge and a clamping method thereof. Background Art

[0002] A steel structure spliced bridge for expressways is a bridge whose main load-bearing structure is made of steel structure, that is, the beam or leg and the pier body form a rigid connection. Under the action of vertical load, the bending moment of the beam is usually smaller than that of a continuous beam or simply supported beam with the same span, and its spanning ability is greater than that of a beam bridge.

[0003] The following disadvantages exist in the construction of traditional steel structure bridges: 1. Since steel structure bridges are mostly prefabricated and then spliced and clamped, the splicing steps between the cross beam and the support beam of the existing steel structure bridges are cumbersome, and the clamping stability is poor; 2. Due to mostly using rigid connections, there is a lack of effective buffer devices between the cross beam and the support beam, resulting in poor shock absorption performance and easy occurrence of rigid dislocation, affecting the overall stability of the steel structure bridge. Summary of the Invention

[0004] The purpose of the invention is to solve the disadvantages of poor splicing between the cross beam and the support beam of the steel structure bridge and lack of shock absorption performance in the prior art, and to propose a splicing, clamping and locking mechanism for a steel structure bridge.

[0005] In order to solve the problems of poor splicing between the cross beam and the support beam of the steel structure bridge and lack of shock absorption performance in the prior art, the invention adopts the following technical solutions:

[0006] A splicing, clamping and locking mechanism for a steel structure bridge includes a cross beam. A fixed disk is arranged below the bottom surface of the cross beam. A square groove is formed in the middle of the top surface of the fixed disk. A square block is arranged in the middle of the bottom surface of the cross beam. The bottom of the square block is slidably inserted into the square groove. A plurality of rectangular grooves are formed in the top surface of the fixed disk. At positions corresponding to the rectangular grooves, a plurality of U-shaped plates are arranged on the bottom surface of the cross beam. Each U-shaped plate is connected to the corresponding rectangular groove through an engaging mechanism;

[0007] A thickened sleeve is arranged on the outer edge of the bottom surface of the fixed disk. A support beam is arranged below the thickened sleeve. A circular groove is formed in the top surface of the support beam. The bottom of the thickened sleeve extends into the circular groove, and the outer wall of the thickened sleeve is slidably connected to the inner wall of the circular groove. The thickened sleeve is connected to the circular groove through a clamping mechanism.

[0008] Preferably, a plurality of T-shaped screws are arranged on the bottom surface of the cross beam. A flange ring is sleeved on the top of the outer ring surface of the fixed disk. The bottom end of each T-shaped screw penetrates through the flange hole on the flange ring and extends to the outside, and a self-locking nut is sleeved on the bottom end of each T-shaped screw.

[0009] Preferably, the meshing mechanism includes a linkage gear and a rack. A pair of linkage shafts are provided inside the rectangular groove. Both ends of each linkage shaft are rotatably connected to the inner wall of the rectangular groove. A linkage gear is sleeved in the middle of each linkage shaft, and the two linkage gears are meshed with each other;

[0010] The U-shaped plate is fitted and inserted into the corresponding rectangular groove, and the outer walls on both sides of the U-shaped plate are slidably connected to the inner walls on both sides of the rectangular groove. Racks are provided on the inner walls on both sides of the U-shaped plate, and each rack is meshed with the corresponding linkage gear.

[0011] Preferably, a ratchet is sleeved on each linkage shaft, and the two ratchets are staggered. Pawls are provided on the inner wall of the rectangular groove below the ratchets, and each pawl is cooperatively pressed against the corresponding ratchet.

[0012] Preferably, a plurality of shock-absorbing long grooves are formed in the bottom surface of the thickened sleeve. A shock-absorbing spring is provided on the inner top wall of each shock-absorbing long groove. A rubber column is provided at the bottom end of each shock-absorbing spring. A plurality of shock-absorbing rods are provided on the inner bottom wall of the circular groove. The top end of each shock-absorbing rod is slidably inserted into the corresponding shock-absorbing groove and pressed against the bottom surface of the rubber column.

[0013] Preferably, the engaging mechanism includes a limiting disc and a limiting plate. A fixed bearing is provided in the middle of the inner bottom wall of the circular groove. A fixed shaft is inserted into the inner part of the fixed bearing. A limiting disc is provided at the top end of the fixed shaft. A plurality of fixing plates are provided on the inner bottom wall of the circular groove outside the limiting disc. A limiting plate is installed on the top of each fixing plate, and the outer end of each limiting plate is pressed against the inner wall of the thickened sleeve.

[0014] Preferably, a rectangular sliding hole is formed in the top of the fixing plate. The middle of each limiting plate slidably penetrates through the corresponding rectangular sliding hole. A retaining ring is concentrically and fixedly connected to the inner bottom port of the thickened sleeve, and the retaining ring is located below the plurality of limiting plates.

[0015] Preferably, the limiting disc is located above the plurality of limiting plates. A plurality of limiting pin holes are evenly distributed on the top surface of the limiting disc. A limiting pin shaft is provided at the inner end of each limiting plate, and the top end of each limiting pin shaft is slidably inserted into the corresponding limiting pin hole.

[0016] Preferably, a first bevel gear is sleeved in the middle of the fixed shaft. An adjusting shaft is provided on the right side of the inner wall of the circular groove. A second bevel gear is sleeved at the inner end of the adjusting shaft. The second bevel gear is meshed with the first bevel gear, and an external hexagonal protrusion is provided at the outer end of the adjusting shaft.

[0017] The present invention also provides a clamping method for the splicing and locking mechanism of a steel structure bridge, including the following steps:

[0018] Step 1, when the fixed plate is installed on the bottom surface of the cross beam, the U-shaped plate is slowly inserted into the rectangular groove, and the rack synchronously drives the linkage gear to mesh and rotate, so that a pair of linkage gears rotate in the opposite direction. The linkage shaft drives the ratchet wheel to cooperate with the pawl to rotate. When the U-shaped plate is completely fixed in the rectangular groove, the top surface of the fixed plate abuts against the bottom surface of the cross beam;

[0019] Step 2, each T-shaped screw penetrates through the flange hole on the flange ring and extends to the outside, and the T-shaped screw is thread-locked by a self-locking nut. The fixed plate is fixedly installed on the bottom surface of the cross beam through the T-shaped screw;

[0020] Step 3, then install the fixed plate and the thickened sleeve in the circular groove. The bottom of the thickened sleeve slowly extends into the circular groove, so that the top ends of the shock-absorbing rods are all slidably inserted into the corresponding shock-absorbing grooves and abut against the bottom surface of the rubber column. Under the action of the shock-absorbing spring, a distance is reserved between the bottom of the thickened sleeve and the inner wall of the circular groove;

[0021] Step 4, rotate the adjusting shaft and the second bevel gear by the external hexagonal protrusion. The second bevel gear meshes with and drives the first bevel gear, the fixed shaft and the limit plate to rotate. The limit pin shaft and the limit pin hole form a limiting function, driving the limit plate to slide outwards along the rectangular sliding hole, and driving the outer ends of the limit plate to abut against the inner wall of the thickened sleeve.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In the present invention, through the combined use of the meshing mechanism, when the U-shaped plate is completely fixed in the rectangular groove, the top surface of the fixed plate abuts against the bottom surface of the cross beam. Through the combined use of the pawl, the U-shaped plate is firmly installed in the rectangular groove, increasing the stability of the cross beam installation;

[0024] 2. In the present invention, through the combined use of the clamping mechanism, the outer ends of the limit plates all abut against the inner wall of the thickened sleeve, increasing the stability of the thickened sleeve installed in the support beam, and under the action of the shock-absorbing spring, increasing the shock-absorbing effect of the thickened sleeve installed in the support beam;

[0025] To sum up, the present invention solves the problems of poor splicing between the cross beam and the support beam of the steel structure bridge and lack of shock-absorbing performance. Moreover, the overall structure design is compact. Through the combined use of various mechanisms, the stability of the splicing and clamping between the cross beam and the support beam is increased, and its shock-absorbing performance is also improved, further extending the service life of the steel structure bridge. Description of the Drawings

[0026] The accompanying drawings described herein are used to provide a further understanding of the present invention and form 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:

[0027] Figure 1 is the front view of the present invention;

[0028] Figure 2 is the front sectional view of the present invention;

[0029] Figure 3 is the schematic top-down sectional view of the top surface of the support beam of the present invention;

[0030] Figure 4 is the top view of the top surface of the fixing plate of the present invention;

[0031] Figure 5 is of the present invention Figure 2 enlarged view at A in;

[0032] Figure 6 is the schematic sectional view of the meshing mechanism of the present invention;

[0033] Figure 7 is the schematic diagram of the clamping method of the present invention;

[0034] Reference numerals in the figures: cross beam 1, square block 11, T-shaped screw 12, self-locking nut 13, U-shaped plate 14, rack 15, fixing plate 2, flange ring 21, linkage shaft 22, linkage gear 23, ratchet 24, pawl 25, thickened sleeve 3, retaining ring 31, shock-absorbing rod 32, rubber column 33, shock-absorbing spring 34, support beam 4, fixed shaft 41, limit disk 42, fixing plate 43, limit plate 44, limit pin shaft 45, first bevel gear 46, adjusting shaft 47, second bevel gear 48. Detailed implementation manners

[0035] 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.

[0036] Embodiment 1: For the purpose of realizing the firm splicing of the cross beam and the support beam of a steel structure bridge and enhancing its shock-absorbing performance, this embodiment provides a splicing clamping and locking mechanism for a steel structure bridge. Refer to Figures 1-6Specifically, it includes a crossbeam 1, which is a horizontally placed steel structure beam body, a square groove is provided in the middle of the top surface of a fixing plate 2, a square block 11 is provided in the middle of the bottom surface of the crossbeam 1, and the bottom of the square block 11 is slidably inserted in the square groove, a fixing plate 2 is provided below the bottom surface of the crossbeam 1, a plurality of circularly arranged rectangular grooves are provided on the top surface of the fixing plate 2, and a plurality of U-shaped plates 14 with openings facing downwards are provided on the bottom surface of the crossbeam 1 at positions corresponding to the rectangular grooves, and each U-shaped plate 14 is connected to the corresponding rectangular groove through a meshing mechanism;

[0037] A concentrically fixed thickened sleeve 3 is provided on the outer edge of the bottom surface of the fixed plate 2, and a support beam 4 is provided below the thickened sleeve 3. The support beam 4 is a vertically placed steel structure beam body, and a circular groove is opened on the top surface of the support beam 4. The bottom of the thickened sleeve 3 extends into the circular groove, and the outer wall of the thickened sleeve 3 is slidably connected to the inner wall of the circular groove. The thickened sleeve 3 is connected to the circular groove by a clamping mechanism.

[0038] In the specific implementation process, Figure 2 As shown, the bottom surface of the crossbeam 1 is provided with a plurality of pre-embedded fixed T-shaped screws 12, and the plurality of T-shaped screws 12 are arranged in a circle. The top of the outer ring surface of the fixing plate 2 is sleeved with a concentrically fixed flange ring 21, and the bottom end portion of each T-shaped screw 12 passes through the flange hole on the flange ring 21 and extends to the outside, and the bottom end portion of each T-shaped screw 12 is sleeved with a threaded self-locking nut 13; each T-shaped screw 12 passes through the flange hole on the flange ring 21 and extends to the outside, and the T-shaped screw 12 is threadedly locked by the self-locking nut 13, and the fixing plate 2 is fixedly installed on the bottom surface of the crossbeam 1 by the T-shaped screw 12, which further increases the stability of the connection between the fixing plate 2 and the crossbeam 1.

[0039] In the specific implementation process, Figure 2 As shown, the bottom surface of the thickened sleeve 3 is provided with a plurality of circularly arranged shock-absorbing long grooves, the inner top wall of each shock-absorbing long groove is provided with a shock-absorbing spring 34, the bottom end of each shock-absorbing spring 34 is provided with a rubber column 33, and the inner bottom wall of the circular groove is provided with a plurality of circularly arranged shock-absorbing rods 32, the top end of each shock-absorbing rod 32 is slidably inserted in the corresponding shock-absorbing groove and pressed against the bottom surface of the rubber column 33; the bottom of the thickened sleeve 3 slowly extends into the circular groove, so that the top ends of the shock-absorbing rods 32 are slidably inserted in the corresponding shock-absorbing groove and pressed against the bottom surface of the rubber column 33, and under the action of the shock-absorbing spring 34, the shock-absorbing effect of the thickened sleeve 3 installed in the support beam 4 is increased.

[0040] In the specific implementation process, Figure 2 and Figure 3As shown in the figure, the clamping mechanism includes a limit disk 42 and a limit plate 44. A fixed bearing is provided in the middle of the inner bottom wall of the circular groove. A vertically placed fixed shaft 41 is inserted into the inside of the fixed bearing. A limit disk 42 is concentrically fixed at the top end of the fixed shaft 41. A plurality of circularly arranged fixing plates 43 are provided on the inner bottom wall of the circular groove outside the limit disk 42. A limit plate 44 is installed on the top of each fixing plate 43. The outer end of each limit plate 44 abuts against the inner wall of the thickened sleeve 3; a rectangular sliding hole is opened at the top of the fixing plate 43. The middle of each limit plate 44 slidably penetrates through the corresponding rectangular sliding hole. A retaining ring 31 is concentrically fixed at the inner bottom port of the thickened sleeve 3. The retaining ring 31 is located below a plurality of limit plates 44;

[0041] A first bevel gear 46 is concentrically fixed on the middle of the fixed shaft 41. A regulating shaft 47 is horizontally penetrated and rotatably connected to the right side of the inner wall of the circular groove. A second bevel gear 48 is concentrically fixed on the inner end of the regulating shaft 47. The second bevel gear 48 is meshed and connected with the first bevel gear 46, and an external hexagonal protrusion is provided at the outer end of the regulating shaft 47; by rotating the external hexagonal protrusion to rotate the regulating shaft 47 and the second bevel gear 48, the second bevel gear 48 drives the first bevel gear 46, the fixed shaft 41 and the limit disk 42 to rotate through meshing;

[0042] The limit disk 42 is located above a plurality of limit plates 44. A plurality of circularly staggered limit pin holes are evenly distributed on the top surface of the limit disk 42. A limit pin shaft 45 is vertically fixed at the inner end of each limit plate 44. The top end of each limit pin shaft 45 is slidably inserted into the corresponding limit pin hole; the limit pin shaft 45 and the limit pin hole form a limiting function, driving the limit plate 44 to slide outwards along the rectangular sliding hole, and driving the outer ends of the limit plates 44 to abut against the inner wall of the thickened sleeve 3, increasing the stability of the thickened sleeve 3 installed in the support beam 4.

[0043] Embodiment 2: In Embodiment 1, there is still a problem that the U-shaped plate and the rectangular groove are not firmly installed. Therefore, on the basis of Embodiment 1, this embodiment further includes:

[0044] In the specific implementation process, as Figure 5 and Figure 6 shown, the meshing mechanism includes a linkage gear 23 and a rack 15. A pair of linkage shafts 22 are provided inside the rectangular groove. The two ends of each linkage shaft 22 are rotatably connected to the inner wall of the rectangular groove. A linkage gear 23 is concentrically fixed on the middle of each linkage shaft 22, and the two linkage gears 23 are meshed and connected; the U-shaped plate 14 is fitted and inserted into the corresponding rectangular groove, and the outer walls on both sides of the U-shaped plate 14 are slidably connected to the inner walls on both sides of the rectangular groove. Racks 15 are provided on the inner walls on both sides of the U-shaped plate 14. Each rack 15 is meshed and connected with the corresponding linkage gear 23;

[0045] A ratchet wheel 24 is sleeved on each linkage shaft 22 and is concentrically and fixedly connected thereto, and the two ratchet wheels 24 are staggered. Below the ratchet wheels 24, pawls 25 are movably hinged to the inner walls of the rectangular grooves, and each pawl 25 is cooperatively abutted against the corresponding ratchet wheel 24; the U-shaped plate 14 is slowly inserted into the rectangular groove, and the rack 15 synchronously drives the linkage gear 23 to mesh and rotate, so that a pair of linkage gears 23 rotate in opposite directions, and the linkage shaft 22 drives the ratchet wheel 24 to rotate in cooperation with the pawl 25. When the U-shaped plate 14 is completely fixed in the rectangular groove, the top surface of the fixed disk 2 abuts against the bottom surface of the cross beam 1. Through the cooperative use of the pawls 25, the U-shaped plate 14 is firmly installed in the rectangular groove.

[0046] Embodiment 3: Refer to Figure 7 , specifically, the working principle and operation method of the present invention are as follows:

[0047] Step 1, when the fixed disk 2 is installed on the bottom surface of the cross beam 1, the U-shaped plate 14 is slowly inserted into the rectangular groove, and the rack 15 synchronously drives the linkage gear 23 to mesh and rotate, so that a pair of linkage gears 23 rotate in opposite directions, and the linkage shaft 22 drives the ratchet wheel 24 to rotate in cooperation with the pawl 25. Wait until the U-shaped plate 14 is completely fixed in the rectangular groove, and the top surface of the fixed disk 2 abuts against the bottom surface of the cross beam 1;

[0048] Step 2, each T-shaped screw rod 12 passes through the flange hole on the flange ring 21 and extends to the outside, and the T-shaped screw rod 12 is thread-locked by the self-locking nut 13, and the fixed disk 2 is fixedly installed on the bottom surface of the cross beam 1 through the T-shaped screw rod 12;

[0049] Step 3, then install the fixed disk 2 and the thickening sleeve 3 in the circular groove. The bottom of the thickening sleeve 3 slowly extends into the circular groove, so that the top ends of the shock-absorbing rods 32 are all slidably inserted into the corresponding shock-absorbing grooves and abut against the bottom surface of the rubber column 33, and under the action of the shock-absorbing spring 34, a distance is reserved between the bottom of the thickening sleeve 3 and the inner wall of the circular groove;

[0050] Step 4, rotate the adjusting shaft 47 and the second bevel gear 48 through the external hexagonal convex block to rotate. The second bevel gear 48 meshes and drives the first bevel gear 46, the fixed shaft 41 and the limiting disk 42 to rotate. The limiting pin shaft 45 and the limiting pin hole form a limiting effect, drive the limiting plate 44 to slide outwards along the rectangular sliding hole, and drive the outer ends of the limiting plates 44 to abut against the inner wall of the thickening sleeve 3.

[0051] The present invention solves the problem that the splicing between the cross beam and the support beam of a steel structure bridge is not firm and lacks shock-absorbing performance, and the overall structure design is compact. Through the cooperative use of each mechanism, the stability of the splicing and clamping between the cross beam and the support beam is increased, and its shock-absorbing performance is also improved, further prolonging the service life of the steel structure bridge.

[0052] The above are only the preferred specific embodiments 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 of the present invention and its inventive concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A splicing, clamping and locking mechanism for a steel structure bridge, including a cross beam (1), characterized in that: A fixing plate (2) is provided below the bottom surface of the cross beam (1). A square groove is formed in the middle of the top surface of the fixing plate (2). A square block (11) is provided in the middle of the bottom surface of the cross beam (1). The bottom of the square block (11) is slidably inserted into the square groove. A plurality of rectangular grooves are formed in the top surface of the fixing plate (2). A plurality of U-shaped plates (14) are provided on the bottom surface of the cross beam (1) at positions corresponding to the rectangular grooves. Each U-shaped plate (14) is connected to the corresponding rectangular groove through an engagement mechanism; A thickening sleeve (3) is provided at the outer edge of the bottom surface of the fixing plate (2). A support beam (4) is provided below the thickening sleeve (3). A circular groove is formed in the top surface of the support beam (4). The bottom of the thickening sleeve (3) extends into the circular groove, and the outer wall of the thickening sleeve (3) is slidably connected to the inner wall of the circular groove. The thickening sleeve (3) is connected to the circular groove through a clamping mechanism; The clamping mechanism includes a limit disc (42) and a limit plate (44). A fixed bearing is provided in the middle of the inner bottom wall of the circular groove. A fixed shaft (41) is inserted into the inside of the fixed bearing. A limit disc (42) is provided at the top end of the fixed shaft (41). A plurality of fixed plates (43) are provided on the inner bottom wall of the circular groove on the outer side of the limit disc (42). A limit plate (44) is installed at the top of each fixed plate (43). The outer end of each limit plate (44) abuts against the inner wall of the thickening sleeve (3).

2. The splicing, clamping and locking mechanism of a steel structure bridge according to claim 1, characterized in that: A plurality of T-shaped screws (12) are provided on the bottom surface of the cross beam (1). A flange ring (21) is sleeved on the top of the outer ring surface of the fixing plate (2). The bottom end of each T-shaped screw (12) passes through the flange hole on the flange ring (21) and extends to the outside, and a self-locking nut (13) is sleeved on the bottom end of each T-shaped screw (12).

3. The splicing, clamping and locking mechanism of a steel structure bridge according to claim 1, characterized in that: The engagement mechanism includes a linkage gear (23) and a rack (15). A pair of linkage shafts (22) are provided inside the rectangular groove. The two ends of each linkage shaft (22) are rotatably connected to the inner wall of the rectangular groove. A linkage gear (23) is sleeved in the middle of each linkage shaft (22), and the two linkage gears (23) are meshed with each other; The U-shaped plate (14) is inserted into the corresponding rectangular groove in a matching manner, and the outer side walls of the U-shaped plate (14) are slidably connected to the inner side walls of the rectangular groove. Racks (15) are provided on the inner side walls of the U-shaped plate (14). Each rack (15) is meshed with the corresponding linkage gear (23).

4. The splicing, clamping and locking mechanism of a steel structure bridge according to claim 3, characterized in that: A ratchet (24) is sleeved on each linkage shaft (22), and the two ratchets (24) are arranged staggeredly. Pawls (25) are provided on the inner wall of the rectangular groove below the ratchet (24). Each pawl (25) is abutted against the corresponding ratchet (24) in a matching manner.

5. A splicing, clamping and locking mechanism for a steel structure bridge according to claim 1, characterized in that: The bottom surface of the thickened sleeve (3) is provided with a number of damping long grooves, the inner top wall of each damping long groove is provided with a damping spring (34), the bottom end of each damping spring (34) is provided with a rubber column (33), the inner bottom wall of the circular groove is provided with a number of damping rods (32), and the top end of each damping rod (32) is slidably inserted into the corresponding damping groove and abuts against the bottom surface of the rubber column (33).

6. The splicing, clamping and locking mechanism of a steel structure bridge according to claim 1, characterized in that: The top of the fixing plate (43) is provided with a rectangular sliding hole, the middle of each limiting plate (44) slidably penetrates through the corresponding rectangular sliding hole, and the inner bottom port of the thickened sleeve (3) is provided with a concentrically fixed retaining ring (31), and the retaining ring (31) is located below a number of limiting plates (44).

7. The splicing, clamping and locking mechanism for a steel structure bridge according to claim 6, characterized in that: The limiting disc (42) is located above a number of limiting plates (44), the top surface of the limiting disc (42) is evenly provided with a number of limiting pin holes, the inner end of each limiting plate (44) is provided with a limiting pin shaft (45), and the top end of each limiting pin shaft (45) is slidably inserted into the corresponding limiting pin hole.

8. The splicing, clamping and locking mechanism of a steel structure bridge according to claim 1, characterized in that: The middle of the fixed shaft (41) is sleeved with a first bevel gear (46), the right side of the inner wall of the circular groove is provided with an adjusting shaft (47), the inner end of the adjusting shaft (47) is sleeved with a second bevel gear (48), the second bevel gear (48) is meshed and connected with the first bevel gear (46), and the outer end of the adjusting shaft (47) is provided with an external hexagonal protrusion.

9. The engaging method of the engaging and locking mechanism for the splicing of a steel structure bridge according to any one of claims 1-8, characterized in that, Including the following steps: Step 1, when the fixed disc (2) is installed on the bottom surface of the cross beam (1), the U-shaped plate (14) is slowly inserted into the rectangular groove, the rack (15) synchronously drives the linkage gear (23) to mesh and rotate, so that a pair of linkage gears (23) rotate in opposite directions, the linkage shaft (22) drives the ratchet wheel (24) to cooperate with the ratchet pawl (25) to rotate, and when the U-shaped plate (14) is completely fixed in the rectangular groove, the top surface of the fixed disc (2) abuts against the bottom surface of the cross beam (1); Step 2, each T-shaped screw rod (12) passes through the flange hole on the flange ring (21) and extends to the outside, and the T-shaped screw rod (12) is threadedly locked by a self-locking nut (13), and the fixed disc (2) is fixedly installed on the bottom surface of the cross beam (1) through the T-shaped screw rod (12); Step 3, then the fixed disc (2) and the thickened sleeve (3) are installed in the circular groove, the bottom of the thickened sleeve (3) slowly extends into the circular groove, so that the top ends of the damping rods (32) are slidably inserted into the corresponding damping grooves and abut against the bottom surface of the rubber column (33), and under the action of the damping spring (34), a distance is reserved between the bottom of the thickened sleeve (3) and the inner wall of the circular groove; Step 4, the adjusting shaft (47) and the second bevel gear (48) are rotated by the external hexagonal protrusion, the second bevel gear (48) meshes and drives the first bevel gear (46), the fixed shaft (41) and the limiting disc (42) to rotate, the limiting pin shaft (45) and the limiting pin hole form a limiting effect, drive the limiting plate (44) to slide outwards along the rectangular sliding hole, and drive the outer ends of the limiting plates (44) to abut against the inner wall of the thickened sleeve (3).

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