Bridge construction precast beam auxiliary transport device

Abstract

The utility model relates to bridge construction equipment technical field discloses a kind of bridge construction precast beam auxiliary transport device, including trailer frame and bracket, bracket is set on trailer frame, bracket top is equipped with gear bracket, swingable side swing arm is equipped in gear bracket gap, side swing arm end is equipped with side roller, precast beam is placed on gear bracket, side swing arm swings to precast beam side, side roller is tightly closed with precast beam side, the utility model is compared with prior art's advantage lies in: longitudinal and lateral double firm constraint, can effectively resist inertia impact, side swing arm self-adapting clamping, without additional adjusting structure, precast beam is placed after automatic clamping, without subsequent manual adjustment, pull rod structure is simple, and tensile strength is strong, can resist the centrifugal force of additional under steering working condition in the transportation of large weight precast beam, failure rate is low, without additional configuration hydraulic cylinder, cylinder or motor and other external power elements, reduce equipment manufacturing cost and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction equipment technology, specifically to an auxiliary transportation device for precast beams in bridge construction. Background Technology

[0002] With the continuous development of bridge construction technology, prefabricated assembly construction methods have been increasingly widely used in bridge engineering due to their advantages such as fast construction speed, easy quality control, and minimal impact on the site environment.

[0003] After precast beams are manufactured in the prefabrication yard, they need to be transported to the bridge erection site using transportation equipment. Currently, the transportation of precast beams mainly relies on beam transport flatcars. Beam transport flatcars are suitable for situations where the distance between the precast beam yard and the bridge erection site is far, where track laying is not suitable or the cost of track laying is high, and their tire-ground friction resistance has a significant advantage compared to rail-mounted beam transport vehicles.

[0004] However, existing beam transport flatcars, when carrying precast beams, only have load-bearing supports at both ends of the entire precast beam, lacking effective lateral support and front and rear restraint structures. This leads to the following problems during actual transportation: First, on uphill and downhill sections, if the slope is steep, the precast beam may experience small displacements in the front-to-back direction, posing a serious safety hazard for large-tonnage precast beams; Second, during turning, the existing support structure cannot guarantee the stability of long precast beams, and the center of the precast beam is prone to shift, resulting in lateral displacement and uneven load distribution on the beam transport vehicle; Third, when transporting precast beams with narrow cross-sections such as T-beams and I-beams, the lack of lateral support results in poor transportation stability. Furthermore, in existing technologies, such as CN213799402U, a screw-driven lateral clamping structure is often used to achieve lateral support and limitation for precast beams of different widths. When the beam transport vehicle is turning, the lateral clamping structure needs to provide the centripetal force to drive the precast beam to follow the vehicle's turn. The reaction force of this force will directly act on the screw drive mechanism. Since the precast beam is usually heavy, the screw drive mechanism needs to bear a large reaction force. Conventional screw drives are difficult to meet this load, and the screw structure is prone to damage after long-term use. Utility Model Content

[0005] The technical problem this invention aims to solve is that the lateral support structure of existing precast beam transportation devices is easily damaged, and this invention provides an auxiliary transportation device for precast beams used in bridge construction.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: an auxiliary transportation device for precast beams in bridge construction, including a trailer frame and a support frame, the support frame being set on the trailer frame, and a toothed bracket being provided on the top of the support frame, characterized in that: a swingable side arm is provided in the gap of the toothed bracket, and a side roller is provided at the end of the side arm, the precast beam is placed on the toothed bracket, the side arm swings to the side of the precast beam, and the side roller abuts against the side of the precast beam.

[0007] Furthermore, an inner swing arm and a spring sleeve are rotatably connected on both sides of the toothed bracket gap. A bottom roller is provided at the top of the inner swing arm. The spring sleeve's elasticity drives the inner swing arm to swing, causing the bottom roller to abut against the bottom surface of the precast beam.

[0008] Furthermore, the spring sleeve is provided with a push rod, the top of which is rotatably connected to the middle of the inner swing arm.

[0009] Furthermore, a tie rod is rotatably connected to the middle of the inner swing arm, and the end of the tie rod is rotatably connected to the middle of the side swing arm.

[0010] Furthermore, the side swing arm is provided with a fork arm at its end, a guide rod is provided on the fork arm, a roller bracket is slidably connected on the guide rod, a side roller is provided at both ends of the roller bracket, and a pivot pin is rotatably provided on both sides of the roller bracket.

[0011] Furthermore, the pivot pin is provided with a through hole for engaging the guide rod.

[0012] Furthermore, a spring for pushing the pivot pin is sleeved on the guide rod, and a limiting block is provided at the end of the guide rod.

[0013] Furthermore, the fork arm is provided with a limiting rod that cooperates with the roller bracket.

[0014] Furthermore, the toothed brackets are arranged in multiple layers at intervals along the extension direction of the precast beam.

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] This device utilizes the gravity of the precast beam itself as the clamping power source through a purely mechanical linkage structure of the inner swing arm, tie rod, and side swing arm. It eliminates the need for additional external power components such as hydraulic cylinders, air cylinders, or motors, thereby reducing equipment manufacturing costs and energy consumption.

[0017] The side swing arm adaptive clamping eliminates the need for additional adjustment structures. It automatically clamps after the precast beam is placed, requiring no subsequent manual adjustment. The tie rod structure is simple and has strong tensile strength, capable of withstanding the additional centrifugal force during the turning process of heavy precast beams during transportation, resulting in a low failure rate.

[0018] By using toothed brackets to frictionally fix the precast beams in the front and rear directions, and with the side swing arms and side rollers elastically pressing against the sides of the beams, a dual stable constraint in the longitudinal and lateral directions is achieved. This effectively resists inertial impacts and prevents the precast beams from sliding longitudinally or overturning laterally, greatly improving the transportation safety and stability under complex road conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this application.

[0020] Figure 2 This is a structural diagram of the precast beam supported by this application.

[0021] Figure 3 This is a schematic diagram of the internal swing arm in this application.

[0022] Figure 4 This is a structural schematic diagram of the tie rod in this application.

[0023] Figure 5 This is a schematic diagram of the side swing arm of this application.

[0024] As shown in the figure: 1. Trailer frame, 2. Support bracket, 3. Inner swing arm, 4. Bottom roller, 5. Side swing arm, 6. Side roller, 7. Tie rod, 8. Toothed bracket, 9. Spring sleeve, 10. Top rod, 11. Guide rod, 12. Spring, 13. Limiting rod, 14. Roller bracket, 15. Rotary pin, 16. Through hole, 17. Limiting block, 18. Fork arm. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combined with appendix Figure 1 Appendix Figure 2 and attached Figure 4 A precast beam auxiliary transportation device for bridge construction includes a trailer frame 1 and a support frame 2. The support frame 2 is mounted on the trailer frame 1. The trailer frame 1 is towed by an external beam transport vehicle or other traction vehicle. The top of the support frame 2 is provided with a toothed bracket 8. A swingable side arm 5 is provided in the gap of the toothed bracket 8. A side roller 6 is provided at the end of the side arm 5. The precast beam is placed on the toothed bracket 8. The side arm 5 swings to the side of the precast beam, and the side roller 6 abuts against the side of the precast beam.

[0027] Combined with appendix Figure 3An inner swing arm 3 and a spring sleeve 9 are rotatably connected on both sides of the toothed bracket 8. The top of the inner swing arm 3 is provided with a bottom roller 4. The spring sleeve 9 is elastically extended to provide a top rod 10. The top of the top rod 10 is rotatably connected to the middle of the inner swing arm 3. The spring sleeve 9 elastically drives the inner swing arm 3 to swing, so that the bottom roller 4 is pressed against the bottom surface of the precast beam. A tie rod 7 is rotatably connected in the middle of the inner swing arm 3. The end of the tie rod 7 is rotatably connected to the middle of the side swing arm 5.

[0028] When the precast beam is placed on the toothed bracket 8, its gravity presses against the bottom roller 4, causing the inner swing arm 3 to swing downwards against the elastic force of the spring sleeve 9. This action, via the tie rod 7, pulls the side swing arm 5 to rotate inwards simultaneously, ensuring that the side roller 6 fits tightly against the side of the precast beam. This linkage mechanism utilizes the precast beam's own weight to achieve self-adaptive clamping, ensuring stability during transportation without the need for an additional power source. It effectively prevents the precast beam from lateral displacement or overturning on bumpy roads. During transportation, the toothed bracket 8 also prevents the precast beam from slipping forward or backward when the transport vehicle accelerates or decelerates, significantly improving construction safety and transportation efficiency.

[0029] In the specific implementation of the above structure, in order to ensure that the tie rod 7 can bear sufficient tensile force, it can be made of tensile carbon fiber braided material to achieve greater tensile strength to match the weight of the precast beam.

[0030] Combined with appendix Figure 5 The side swing arm 5 is provided with a fork arm 18 at its end. A guide rod 11 is provided on the fork arm 18. A roller bracket 14 is slidably connected to the guide rod 11. Side rollers 6 are provided at both ends of the roller bracket 14. Rotatable pivot pins 15 are provided on both sides of the roller bracket 14. Through holes 16 that cooperate with the guide rod 11 are provided on the pivot pins 11. A spring 12 that pushes the pivot pins 15 is sleeved on the guide rod 11. A limiting block 17 is provided at the end of the guide rod 11. A limiting rod 13 that cooperates with the roller bracket 14 is provided on the fork arm 18.

[0031] While the side rollers 6 on the roller bracket 14 are in contact with the side of the precast beam, the force of the swing arm 5 is applied to the pivot pin 15 through the spring 12. When the width of the precast beam is large, the spring 12 is compressed to accommodate the precast beam of different widths.

[0032] When the side swing arm 5 swings toward the side of the precast beam, the side roller 6 at the bottom of the roller bracket 14 first comes into contact with the side of the precast beam. As the side swing arm 5 moves closer to the side of the precast beam, the swing of the side swing arm 5 forces the roller bracket 14 to rotate, causing the side roller 6 at the top of the roller bracket 14 to come into contact with the side of the precast beam. Through the above structure, adaptive contact and tightness are achieved for the side walls of the precast beam with different inclinations.

[0033] The pivot pin 15 is located near the lower middle part of the roller bracket 14. The center of gravity of the roller bracket 14 is located above the pivot pin 15. Under the action of gravity, the center of gravity of the roller bracket 14 causes the roller bracket 14 to rotate around the pivot pin 15 and tilt. When the side roller 6 is not in contact with the side of the precast beam, the tilting range of the roller bracket 14 is limited by the limiting rod 13.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An auxiliary transportation device for precast beams in bridge construction, comprising a trailer frame (1) and a support frame (2), wherein the support frame (2) is mounted on the trailer frame (1), and a toothed bracket (8) is provided on the top of the support frame (2), characterized in that: A swingable side arm (5) is provided in the gap of the toothed bracket (8). A side roller (6) is provided at the end of the side arm (5). The precast beam is placed on the toothed bracket (8). The side arm (5) swings to the side of the precast beam. The side roller (6) abuts against the side of the precast beam. The toothed bracket (8) is rotatably connected to the inner swing arm (3) and the spring sleeve (9) on both sides of the gap. The inner swing arm (3) is equipped with a bottom roller (4) at the top. The spring sleeve (9) causes the inner swing arm (3) to swing, so that the bottom roller (4) is pressed against the bottom surface of the precast beam.

2. The auxiliary transportation device for precast beams in bridge construction according to claim 1, characterized in that: The spring sleeve (9) is elastically extended to provide a push rod (10), and the top end of the push rod (10) is rotatably connected to the middle part of the inner swing arm (3).

3. The auxiliary transportation device for precast beams in bridge construction according to claim 1, characterized in that: The inner swing arm (3) is rotatably connected to a tie rod (7) in the middle, and the end of the tie rod (7) is rotatably connected to the middle of the side swing arm (5).

4. The auxiliary transportation device for precast beams in bridge construction according to claim 3, characterized in that: The side swing arm (5) is provided with a fork arm (18) at its end. A guide rod (11) is provided on the fork arm (18). A roller bracket (14) is slidably connected on the guide rod (11). Side rollers (6) are provided at both ends of the roller bracket (14). Rotary pivot pins (15) are provided on both sides of the roller bracket (14).

5. The auxiliary transportation device for precast beams in bridge construction according to claim 4, characterized in that: The pivot pin (15) is provided with a through hole (16) for cooperating with the guide rod (11).

6. The auxiliary transportation device for precast beams in bridge construction according to claim 5, characterized in that: The guide rod (11) is fitted with a spring (12) that pushes the pivot pin (15), and a limiting block (17) is provided at the end of the guide rod (11).

7. The auxiliary transportation device for precast beams in bridge construction according to claim 5, characterized in that: The fork arm (18) is provided with a limiting rod (13) that cooperates with the roller bracket (14).

8. The auxiliary transportation device for precast beams in bridge construction according to claim 1, characterized in that: The toothed bracket (8) is arranged in multiple layers at intervals along the extension direction of the precast beam.

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