Construction platform for installation of small longitudinal beam of cable-stayed bridge

Abstract

The utility model belongs to cable-stayed bridge steel beam installation construction technical field, specifically speaking is a kind of construction platform for the installation of cable-stayed bridge small longitudinal beam, including construction platform;The top fixed mounting of construction platform has stand, the top fixed mounting of stand has top longitudinal beam, the bottom of construction platform is provided with expansion mechanism, the bottom of construction platform and located one side of expansion mechanism surface is provided with drive assembly;The bottom of construction platform and located one side close to worm wheel is provided with driven mechanism, by the setting of first cross bar, threaded rod, bottom plate, threaded cylinder and worm wheel, make first cross bar can provide the guiding effect for threaded rod, make it not appear to sway when telescoping, simultaneously prevent it synchronous rotation with threaded cylinder, the cooperation of threaded rod and bottom plate can provide stable ground support for construction platform, simultaneously still can realize the decline by the drive of drive assembly.

Description

Technical Field

[0001] This utility model belongs to the field of cable-stayed bridge steel beam installation and construction technology, specifically a construction platform for installing small longitudinal beams of cable-stayed bridges. Background Technology

[0002] Cable-stayed bridges are widely used in projects spanning rivers, valleys, and complex mountainous terrains due to their advantages such as strong spanning capacity and lightweight structure (e.g., the Yumenkou Yellow River Highway Bridge on National Highway 108, and cable-stayed bridges on mountain expressways). As a key load-bearing component of the bridge deck system, the longitudinal beams need to connect with the crossbeams to form a grid-like support system. Their installation accuracy directly affects the load-bearing stability of the bridge deck; specifications require that the connection error be controlled within 2mm (《Highway Bridge and Culvert Construction Technical Specification》JTG / T3650-2020).

[0003] In the early stages of bridge construction, it is inconvenient to install hoisting equipment, which makes it impossible to use the construction platform. Traditional construction platforms have the following adaptability defects on the ground: they rely on manual leveling of the ground in advance, and for areas with a height difference of more than 0.5m, it is necessary to build scaffolds in layers or pour stepped subfloor layers, which increases the construction period by 30%-50% and increases the material loss rate by 20%.

[0004] Therefore, this utility model provides a construction platform for installing small longitudinal beams of cable-stayed bridges. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background art, a construction platform for installing small longitudinal beams of cable-stayed bridges is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A construction platform for installing small longitudinal beams of a cable-stayed bridge, comprising a construction platform; a column is fixedly installed on the top of the construction platform, a top longitudinal beam is fixedly installed on the top of the column, a telescopic mechanism is provided at the bottom of the construction platform, and a drive assembly is provided on the bottom of the construction platform and on one side of the telescopic mechanism surface; a driven mechanism is provided at the bottom of the construction platform and on the side near the worm gear, and transmission mechanisms are provided on both sides of the bottom of the construction platform; a transmission mechanism is provided on the side of the transmission mechanism near the driven mechanism, and a transmission mechanism is provided at the bottom of the construction platform... The platform is equipped with a drive mechanism; the telescopic mechanism includes a first cross bar, a threaded rod, and a base plate. Four sets of the first cross bars are fixedly installed at the four corners of the bottom of the construction platform. The surface of the first cross bar is slidably connected to the threaded rod, and the bottom of the threaded rod is fixedly installed to the base plate. The first cross bar provides guidance for the threaded rod, preventing it from swaying during telescopic movement and preventing it from rotating synchronously with the threaded cylinder. The cooperation between the threaded rod and the base plate provides stable ground support for the construction platform and allows it to descend via the drive assembly, ensuring sufficient stability even on uneven ground.

[0007] Preferably, the drive assembly includes a threaded cylinder and a worm gear. The threaded cylinder is rotatably mounted on the bottom of the construction platform and located on the surface of the threaded rod. The top of the surface of the threaded cylinder is fixedly mounted to the worm gear. The threaded cylinder is threadedly connected to the threaded rod. In this scheme, the combined use of the threaded cylinder and the worm gear can drive the threaded rod to descend through the driven mechanism, allowing it to adjust its extension and retraction according to the depth of the pit, thus ensuring the stability of the construction platform.

[0008] Preferably, the driven mechanism includes a first shaft bracket, a worm gear, and a transmission shaft. The first shaft bracket is fixedly installed at the bottom of the construction platform and located on one side of the worm wheel. The inner wall of the first shaft bracket is rotatably installed with the worm gear. The worm gear meshes with the worm wheel. The sides of the two sets of worm gears that are close to each other are fixedly installed with the transmission shaft. In this scheme, the cooperation of the first shaft bracket, the worm gear, and the transmission shaft can transmit the power of the transmission mechanism to the worm wheel, enabling it to rotate normally. At the same time, a self-locking mechanism is formed between the worm gear and the worm wheel, which can prevent the worm wheel from rotating on its own.

[0009] Preferably, the transmission mechanism includes a second shaft frame, a first rotating rod, and a second cross rod. The second shaft frame is fixedly installed at the bottom of the construction platform and located on the side close to the transmission shaft. The inner wall of the second shaft frame is rotatably installed with the first rotating rod, and the inner wall of the first rotating rod is movably inserted into the second cross rod. In this scheme, the cooperation of the second shaft frame, the first rotating rod, and the second cross rod can transmit the power of the first bevel tooth to the first tooth plate, enabling it to rotate normally. At the same time, the telescopic function of the second cross rod allows the first tooth plate to disengage from the second tooth plate at any time.

[0010] Preferably, the transmission mechanism includes a spring, a first toothed plate, and a second toothed plate. The spring is fixedly installed on the side of the first rotating rod near the second cross rod, and the first toothed plate is fixedly installed on the side of the second cross rod away from the first rotating rod. The first toothed plate is movably connected to the spring, and the second toothed plate is fixedly installed on the side of the transmission shaft away from the worm gear. The first toothed plate and the second toothed plate mesh with each other. In this scheme, the spring can push the first toothed plate to keep it in a meshing state with the second toothed plate, so that the first toothed plate can drive the second toothed plate to rotate normally. The cooperation of the first toothed plate and the second toothed plate can achieve the transmission effect. At the same time, when either one is locked, the first toothed plate and the second toothed plate can automatically disengage, so as not to affect the normal rotation of the other.

[0011] Preferably, the drive mechanism includes a first bevel gear, a third shaft bracket, a second rotating rod, a second bevel gear, and an adjustment knob. The first bevel gear is fixedly installed at the end of the first rotating rod away from the second cross rod. The third shaft bracket is fixedly installed in the middle of the bottom of the construction platform. The inner wall of the third shaft bracket is rotatably installed with the second rotating rod. The two sides of the surface of the second rotating rod near the first bevel gear are fixedly installed with the second bevel gear. The second bevel gear meshes with the first bevel gear. One end of the second rotating rod is fixedly installed with the adjustment knob. In this scheme, the coordinated use of the first bevel gear, the third shaft bracket, the second rotating rod, the second bevel gear, and the adjustment knob can achieve the effect of driving the four sets of first rotating rods to rotate synchronously by the user's rotation, so that the power can be maximized. At the same time, the user can operate the extension and retraction of the four sets of threaded rods simultaneously, saving setup time.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The construction platform for installing small longitudinal beams of cable-stayed bridges described in this utility model, through the arrangement of a first cross bar, a threaded rod, a base plate, a threaded cylinder, and a worm gear, enables the first cross bar to provide guidance for the threaded rod, preventing it from swaying during extension and retraction, and also preventing it from rotating synchronously with the threaded cylinder. The cooperation between the threaded rod and the base plate provides stable ground support for the construction platform, and can also achieve descent through the drive component to ensure sufficient stability even on uneven ground. The cooperation between the threaded cylinder and the worm gear enables the threaded rod to descend through the driven mechanism, allowing it to extend and retract according to the depth of the unevenness, ensuring the stability of the construction platform.

[0014] 2. The construction platform for installing small longitudinal beams of cable-stayed bridges described in this utility model, through the arrangement of a first shaft frame, worm gear, transmission shaft, second shaft frame, first rotating rod, and second cross rod, enables the power of the transmission mechanism to be transmitted to the worm wheel through the cooperation of the first shaft frame, worm gear, and transmission shaft, allowing it to rotate normally. At the same time, a self-locking mechanism is formed between the worm gear and the worm wheel to prevent the worm wheel from rotating on its own. The cooperation of the second shaft frame, first rotating rod, and second cross rod enables the power of the first bevel gear to be transmitted to the first tooth plate, allowing it to rotate normally. Meanwhile, the telescopic function of the second cross rod allows the first tooth plate to disengage from the second tooth plate at any time. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a front perspective view of the present invention;

[0017] Figure 2 This is a partial structural schematic diagram of the construction platform in this utility model;

[0018] Figure 3 This is a cross-sectional view of the threaded cylinder in this utility model;

[0019] Figure 4 This is a partial structural schematic diagram of the driven mechanism in this utility model;

[0020] Figure 5 This is a partial exploded structural diagram of the transmission mechanism in this utility model.

[0021] Legend:

[0022] 1. Construction platform; 2. Column; 3. Top longitudinal beam; 4. Telescopic mechanism; 41. First crossbar; 42. Threaded rod; 43. Base plate; 5. Drive assembly; 51. Threaded cylinder; 52. Worm gear; 6. Driven mechanism; 61. First shaft frame; 62. Worm; 63. Drive shaft; 7. Transmission mechanism; 71. Second shaft frame; 72. First rotating rod; 73. Second crossbar; 8. Transmission mechanism; 81. Spring; 82. First toothed plate; 83. Second toothed plate; 9. Drive mechanism; 91. First bevel gear; 92. Third shaft frame; 93. Second rotating rod; 94. Second bevel gear; 95. Adjustment knob. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figures 1 to 5As shown in the embodiment of this utility model, a construction platform for installing small longitudinal beams of a cable-stayed bridge includes a construction platform 1; a column 2 is fixedly installed on the top of the construction platform 1, and a top longitudinal beam 3 is fixedly installed on the top of the column 2; a telescopic mechanism 4 is provided at the bottom of the construction platform 1; a drive assembly 5 is provided at the bottom of the construction platform 1 on one side of the surface of the telescopic mechanism 4; a driven mechanism 6 is provided at the bottom of the construction platform 1 on one side near the worm gear 52; transmission mechanisms 7 are provided on both sides of the bottom of the construction platform 1; a transmission mechanism 8 is provided on the side of the transmission mechanism 7 near the driven mechanism 6; and a drive mechanism 9 is provided in the middle of the bottom of the construction platform 1; the telescopic mechanism 4 includes a first cross rod 41, a threaded rod 42, and a base plate 43, the second cross rod 41, the third cross rod 42, the third cross rod 42, the third cross rod 42, the third cross rod 42, the third cross rod 42, the third cross rod 42, the third cross rod 42, the third cross rod 42, the fourth ... fifth cross rod 42, the sixth cross rod 42, the third cross rod 42, the fourth cross rod 42, the fifth cross rod 42, the sixth cross rod 42, the third cross rod 4 Four sets of cross rods 41 are provided. The four sets of first cross rods 41 are fixedly installed at the four corners of the bottom of the construction platform 1. The surface of the first cross rod 41 is slidably connected to the threaded rod 42, and the bottom of the threaded rod 42 is fixedly installed to the base plate 43. The drive assembly 5 includes a threaded cylinder 51 and a worm gear 52. The threaded cylinder 51 is rotatably installed at the bottom of the construction platform 1 and located on the surface of the threaded rod 42. The top of the surface of the threaded cylinder 51 is fixedly installed to the worm gear 52. The threaded cylinder 51 is threadedly connected to the threaded rod 42. The driven mechanism 6 includes a first shaft bracket 61, a worm gear 62, and a drive shaft 63. The first shaft bracket 61 is fixedly installed at the bottom of the construction platform 1 and located on one side of the worm gear 52. The inner wall of the first shaft bracket 61 is rotatably installed to the worm gear 62. The worm gear 62 is threadedly connected to the threaded rod 42. Worm gears 52 mesh with each other, and the two sets of worms 62 are fixedly installed on the side of their proximity to each other with the drive shaft 63. The transmission mechanism 7 includes a second shaft bracket 71, a first rotating rod 72, and a second cross rod 73. The second shaft bracket 71 is fixedly installed at the bottom of the construction platform 1 and located on the side close to the drive shaft 63. The inner wall of the second shaft bracket 71 is rotatably installed with the first rotating rod 72, and the inner wall of the first rotating rod 72 is movably inserted into the second cross rod 73. The transmission mechanism 8 includes a spring 81, a first toothed plate 82, and a second toothed plate 83. The spring 81 is fixedly installed on the side of the first rotating rod 72 close to the second cross rod 73, and the first toothed plate 82 is fixedly installed on the side of the second cross rod 73 away from the first rotating rod 72. The first toothed plate 82 and the spring 81 are movably connected. The drive mechanism 9 includes a first bevel gear 91, a third shaft bracket 92, a second rotating rod 93, a second bevel gear 94, and an adjustment knob 95. The first bevel gear 91 is fixedly installed at the end of the first rotating rod 72 away from the second cross rod 73. The third shaft bracket 92 is fixedly installed at the middle of the bottom of the construction platform 1. The inner wall of the third shaft bracket 92 is rotatably mounted with the second rotating rod 93. The two sides of the surface of the second rotating rod 93 near the first bevel gear 91 are fixedly mounted with the second bevel gear 94. The second bevel gear 94 meshes with the first bevel gear 91. One end of the second rotating rod 93 is fixedly mounted with the adjustment knob 95.

[0026] like Figures 1 to 5As shown, the first cross bar 41 guides the threaded rod 42, preventing it from wobbling during extension and retraction, and also preventing it from rotating synchronously with the threaded cylinder 51. The cooperation between the threaded rod 42 and the base plate 43 provides stable ground support for the construction platform 1, and also enables descent via the drive assembly 5, ensuring sufficient stability even on uneven ground. The cooperation between the threaded cylinder 51 and the worm gear 52 enables the threaded rod 42 to descend via the driven mechanism 6, allowing it to adjust its extension and retraction according to the depth of the uneven ground, ensuring the stability of the construction platform 1. The cooperation between the first shaft bracket 61, the worm gear 62, and the transmission shaft 63 transmits the power of the transmission mechanism 8 to the worm gear 52, enabling it to rotate normally. Simultaneously, a self-locking mechanism is formed between the worm gear 62 and the worm gear 52, preventing the worm gear 52 from rotating on its own. The cooperation between the second shaft bracket 71, the first rotating rod 72, and the second cross bar 73 enables the first bevel gear... The power transmission of 91 is transmitted to the first toothed plate 82, enabling it to rotate normally. At the same time, the telescopic function of the second cross rod 73 allows the first toothed plate 82 to disengage from the second toothed plate 83 at any time. The spring 81 can push the first toothed plate 82 to keep it in engagement with the second toothed plate 83, so that the first toothed plate 82 can drive the second toothed plate 83 to rotate normally. The cooperation between the first toothed plate 82 and the second toothed plate 83 can achieve the transmission effect. At the same time, when either one is locked, the first toothed plate 82 and the second toothed plate 83 can automatically disengage, so as not to affect the normal rotation of the other. The cooperation of the first bevel tooth 91, the third shaft 92, the second rotating rod 93, the second bevel tooth 94 and the adjusting knob 95 can drive the four sets of first rotating rods 72 to rotate synchronously by the user, so as to maximize the utilization of power. At the same time, the user can operate the telescopic function of the four sets of threaded rods 42 simultaneously, saving setup time.

[0027] Working principle: During operation, the construction platform 1 is first placed in the usage position. If the ground is uneven, the user needs to turn the adjustment knob 95 to drive the second rotating rod 93 to rotate. The rotation of the second rotating rod 93 will drive the first bevel gear 91 to rotate through two sets of second bevel teeth 94. The rotation of the first bevel gear 91 will drive the first rotating rod 72 to rotate. When the first rotating rod 72 rotates, it will drive the first toothed plate 82 to rotate through the second cross rod 73. The rotation of the first toothed plate 82 will drive the second toothed plate 83, which meshes with it, to rotate. The rotation of the second toothed plate 83 will drive the worm gear 62 to rotate through the transmission shaft 63. The rotation of the worm gear 62 will drive the threaded cylinder 51 to rotate through the worm wheel 52. The rotation of the threaded cylinder 51 will cause the threaded rod 42 to move axially along the inner wall of the threaded cylinder 51 and move downwards. As the rod 42 descends, the base plate 43 will descend to the depression in the ground, providing stable support for the construction platform 1. When one set of base plates 43 contacts the ground, the threaded rod 42 cannot move downwards, so the first toothed plate 82 will be locked when driving the second toothed plate 83. At that time, due to the continued pressure of torque, the first toothed plate 82 will slip because it cannot drive the second toothed plate 83. At that time, the first toothed plate 82 will move towards the second shaft 71 and squeeze the spring 81. At the same time, the second cross rod 73 will insert into the first rotating rod 72, so that the first toothed plate 82 will briefly disengage from the second toothed plate 83, so that the other three sets of threaded rods 42 can be driven normally. The user continues to rotate the adjustment knob 95 until all four sets of base plates 43 are in contact with the ground, so that the construction platform 1 can remain stable even on uneven ground.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A construction platform for installing small longitudinal beams of a cable-stayed bridge, comprising a construction platform (1); characterized in that: The construction platform (1) is fixedly installed with a column (2), and a top longitudinal beam (3) is fixedly installed on the top of the column (2). The construction platform (1) is provided with a telescopic mechanism (4) at the bottom. The construction platform (1) is provided with a drive assembly (5) at the bottom and on one side of the surface of the telescopic mechanism (4). The telescopic mechanism (4) includes a first cross rod (41), a threaded rod (42) and a base plate (43). The first cross rod (41) is provided in four sets. The four sets of the first cross rod (41) are fixedly installed at the four corners of the bottom of the construction platform (1). The surface of the first cross rod (41) is slidably connected to the threaded rod (42). The bottom of the threaded rod (42) is fixedly installed to the base plate (43). The drive assembly (5) includes a threaded cylinder (51) and a worm gear (52). The threaded cylinder (51) is rotatably mounted on the bottom of the construction platform (1) and located on the surface of the threaded rod (42). The top of the surface of the threaded cylinder (51) is fixedly mounted to the worm gear (52). The threaded cylinder (51) is threadedly connected to the threaded rod (42).

2. The construction platform for installing small longitudinal beams of a cable-stayed bridge according to claim 1, characterized in that: A driven mechanism (6) is provided at the bottom of the construction platform (1) and on the side close to the worm gear (52), and a transmission mechanism (7) is provided on both sides of the bottom of the construction platform (1).

3. The construction platform for installing small longitudinal beams of a cable-stayed bridge according to claim 2, characterized in that: The transmission mechanism (7) is provided with a transmission mechanism (8) on the side near the driven mechanism (6), and the construction platform (1) is provided with a drive mechanism (9) at the middle of the bottom.

4. The construction platform for installing small longitudinal beams of a cable-stayed bridge according to claim 3, characterized in that: The driven mechanism (6) includes a first shaft frame (61), a worm (62) and a transmission shaft (63). The first shaft frame (61) is fixedly installed at the bottom of the construction platform (1) and located on one side of the worm wheel (52). The inner wall of the first shaft frame (61) is rotatably installed with the worm (62). The worm (62) meshes with the worm wheel (52). The two sets of worms (62) are fixedly installed on the side of each other that is close to each other with the transmission shaft (63).

5. A construction platform for installing small longitudinal beams of a cable-stayed bridge according to claim 4, characterized in that: The transmission mechanism (7) includes a second shaft frame (71), a first rotating rod (72), and a second cross rod (73). The second shaft frame (71) is fixedly installed at the bottom of the construction platform (1) and located on the side close to the transmission shaft (63). The inner wall of the second shaft frame (71) is rotatably installed with the first rotating rod (72), and the inner wall of the first rotating rod (72) is movably inserted into the second cross rod (73).

6. A construction platform for installing small longitudinal beams of a cable-stayed bridge according to claim 5, characterized in that: The transmission mechanism (8) includes a spring (81), a first toothed plate (82), and a second toothed plate (83). The spring (81) is fixedly installed on the side of the first rotating rod (72) near the second cross rod (73). The first toothed plate (82) is fixedly installed on the side of the second cross rod (73) away from the first rotating rod (72). The first toothed plate (82) is movably connected to the spring (81). The second toothed plate (83) is fixedly installed on the side of the transmission shaft (63) away from the worm gear (62). The first toothed plate (82) and the second toothed plate (83) mesh with each other.

7. A construction platform for installing small longitudinal beams of a cable-stayed bridge according to claim 6, characterized in that: The drive mechanism (9) includes a first bevel gear (91), a third shaft bracket (92), a second rotating rod (93), a second bevel gear (94), and an adjustment knob (95). The first bevel gear (91) is fixedly installed at one end of the first rotating rod (72) away from the second cross rod (73). The third shaft bracket (92) is fixedly installed at the middle of the bottom of the construction platform (1). The inner wall of the third shaft bracket (92) is rotatably installed with the second rotating rod (93). The two sides of the surface of the second rotating rod (93) near the first bevel gear (91) are fixedly installed with the second bevel gear (94). The second bevel gear (94) meshes with the first bevel gear (91). One end of the second rotating rod (93) is fixedly installed with the adjustment knob (95).

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