A flat wheel box and bridge transport vehicle

Abstract

This utility model provides a flat wheel box and a bridge transport vehicle. The flat wheel box includes a top plate, a first side plate, a second side plate, a pin, and rollers. The first and second side plates are spaced apart and connected to the lower surface of the top plate. The rollers are mounted on the pin via bearings. The pin is mounted on the first and second side plates. The rollers are conical, with the smaller diameter end of the roller positioned close to the first side plate. A portion of the roller's surface extends beyond the lower ends of the first and second side plates. This utility model solves the problem of sliding friction caused by the mismatch between the inner and outer angular velocities during the horizontal rotation of traditional straight rollers around a central axis; thereby improving the wheel box's operating efficiency, reducing power loss, and enhancing mechanical durability.

Description

Technical Field

[0001] This utility model relates to the field of bridge installation technology, and in particular to a flat wheel box and a bridge transport vehicle. Background Technology

[0002] With the increasing demand for large-tonnage bridges spanning seas and rivers, the requirements for bridge machinery and equipment are becoming increasingly stringent. Bridge construction is no longer limited to traditional small-scale projects, but is gradually moving towards mega-projects such as cross-sea bridges and high-speed railway bridges, which require the ability to withstand enormous loads and cope with complex environments. This development trend has not only driven innovation in bridge design and construction technologies, but also highlighted the irreplaceable core role of machinery and equipment in the entire engineering chain. From design and manufacturing to construction and maintenance, high-performance, high-efficiency, and high-reliability machinery and equipment have become a key support for the sustainable development of bridge engineering in China.

[0003] The trend towards longer spans in bridge engineering means a further increase in the weight and load-bearing capacity of components, which places higher demands on the transportation and installation capabilities of machinery and equipment. Specialized transport vehicles and bridge erecting machines have become indispensable tools in the erection of large-tonnage beams, and their design must be precisely matched with the specific parameters of the bridge project.

[0004] Existing bridge transport vehicles include a chassis, a load-bearing platform, and wheel boxes installed at the lower end of the load-bearing platform and in rolling contact with the chassis. The wheel boxes are concentric straight rollers. When they rotate concentrically, the inner and outer angular velocities of the rollers are the same, resulting in a mismatch in the paths and relative sliding friction between the inner and outer sides. This reduces the mechanical operating efficiency and affects the durability of the mechanical structure. Utility Model Content

[0005] The purpose of this utility model is to provide a flat wheel box and a bridge transport vehicle that does not generate internal or external sliding friction, improves the wheel box operating efficiency, reduces power loss, and improves mechanical durability.

[0006] The technical solution of this utility model is: a flat rotary box, including a top plate, a first side plate, a second side plate, a pin shaft and a roller. The first side plate and the second side plate are connected at intervals on the lower surface of the top plate. The roller is mounted on the pin shaft by a bearing. The pin shaft is mounted on the first side plate and the second side plate. The roller is conical, with the small diameter end of the roller located close to the first side plate. Part of the wheel surface of the roller extends out relative to the lower ends of the first side plate and the second side plate.

[0007] In the above scheme, by designing the roller as a cone, its physical properties are utilized. The cone structure allows the roller to run at a uniform angular velocity during the rolling process. The cone shape with large and small diameters ensures that the arc length of the roller's full cross-section rotation matches the angular velocity, making the entire cross-section of the roller roll in a concentric rolling state, eliminating internal and external sliding friction, improving the efficiency of the wheel box, reducing power loss, and improving mechanical durability.

[0008] Preferably, the mounting point of the pin on the first side plate forms a distance L1 between it and the top plate, and the mounting point of the pin on the second side plate forms a distance L2 between it and the top plate, where L1 > L2. In other words, the axis of the pin is inclined, forming an angle with the horizontal plane.

[0009] Preferably, two bearings are arranged at intervals along the axial direction of the roller. At the ends of the two bearings that are far apart from each other, there are end caps for limiting the outer ring of the bearing and pressure caps for limiting the inner ring of the bearing. The pressure caps are fitted onto the pins, and the end caps are fitted onto the pressure caps.

[0010] Preferably, the pin includes a shaft portion and a retaining plate, the roller is mounted on the shaft portion, the shaft portion passes through the first side plate and the second side plate, and the two ends of the shaft portion are limited by the retaining plate, the retaining plate being connected to the first side plate or the second side plate by bolts.

[0011] Preferably, a stiffening rib is connected between the second side plate and the top plate, and multiple stiffening ribs are symmetrically arranged on the second side plate.

[0012] This utility model also provides a bridge transport vehicle, including a chassis, a carrying platform, and a plurality of flat wheel boxes evenly distributed in a circle. The top plate of the flat wheel box is installed at the bottom of the carrying platform, and the rollers of the flat wheel box are in rolling contact with the upper surface of the chassis.

[0013] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0014] I. By designing a conical roller, utilizing its physical properties, the conical structure allows the roller to operate at a uniform angular velocity during horizontal rolling. Furthermore, the conical structure with both large and small diameters ensures that the arc length of the roller's entire cross-section rotation matches the angular velocity. This results in only rolling friction and no sliding friction during the wheel box's rotation, ensuring the roller's entire cross-section rolls concentrically without internal or external sliding friction. This solves the problem of sliding friction caused by the mismatch between internal and external angular velocities in traditional straight rollers during horizontal rotation around a central axis. Consequently, it improves the wheel box's operating efficiency, reduces power loss, and enhances mechanical durability.

[0015] 2. Two bearings are installed between the roller and the pin to provide good lubrication for the tapered roller;

[0016] 3. The shaft of the pin can be detachably mounted on the side plate via a clamp and bolts, which facilitates the replacement of the rollers;

[0017] Fourth, the top plate, first side plate, second side plate and stiffening plate in the flat wheel box are connected as one piece, which has good integrity and stability. Attached Figure Description

[0018] Figure 1 A partial cross-sectional view of the structure of the flat rotary box provided by this utility model;

[0019] Figure 2 for Figure 1 The right-hand view in the middle;

[0020] Figure 3 A schematic diagram of the structure of the bridge transport vehicle provided by this utility model.

[0021] In the attached diagram: 1. Flat wheel box; 11. Top plate; 12. First side plate; 13. Second side plate; 14. Pin; 141. Shaft; 142. Clamping plate; 143. Bolt; 15. Roller; 16. Bearing; 17. End cover; 18. Pressure cover; 19. Rib plate; 110. Sleeve; 2. Chassis; 3. Bearing platform. Detailed Implementation

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0023] like Figure 1 As shown, the flat rotary box 1 provided in this embodiment includes a top plate 11, a first side plate 12, a second side plate 13, a pin 14, a roller 15, a bearing 16, an end cover 17, a pressure cover 18, and a stiffening plate 19.

[0024] The top plate 11 is a rectangular plate with a length direction X and a width direction Y. The first side plate 12 and the second side plate 13 are connected to the lower surface of the top plate 11 at intervals along the length direction X. Ribs 19 connect the second side plate 13 to the top plate 11, and two ribs 19 are symmetrically arranged in the Y direction of the second side plate 13 (e.g.,...). Figure 2 (As shown). The top plate 11, the first side plate 12, the second side plate 13, and the stiffening plate 19 can be welded or bolted together. Their combination serves as the main structure of the wheel box, and the integrity of the wheel box must be ensured.

[0025] The roller 15 is mounted on the pin 14 via a bearing 16. The pin 14 is mounted on the first side plate 12 and the second side plate 13.

[0026] The mounting point of the pin 14 on the first side plate 12 forms a distance L1 between it and the top plate 11, and the mounting point of the pin 14 on the second side plate 13 forms a distance L2 between it and the top plate 11, where L1 > L2. This allows the roller 15 to be installed at an angle.

[0027] The pin 14 includes a shaft portion 141, a retaining plate 142, and a bolt 143. Two bearings 16 are fitted onto the shaft portion 141. The shaft portion 141 passes through the first side plate 12 and the second side plate 13, and both ends of the shaft portion 141 are limited by the retaining plate 142. The retaining plate 142 is connected to the first side plate 12 or the second side plate 13 by bolts 143 (e.g., ...). Figure 2 (As shown).

[0028] The roller 15 is mounted on the bearing 16. The roller 15 is conical, with its smaller diameter end positioned near the first side plate 12. A portion of the roller 15's surface extends beyond the lower ends of the first side plate 12 and the second side plate 13. Utilizing the rotational physics theorem, the conical structure ensures that the arc length of the roller 15's entire cross-section during horizontal rotation matches the same angular velocity.

[0029] At the ends of the two bearings 16 that are far apart from each other, there are end caps 17 for limiting the outer ring of the bearings 16 and pressure caps 18 for limiting the inner ring of the bearings 16. The pressure caps 18 are fitted onto the shaft portion 141, and the end caps 17 are fitted onto the pressure caps 18. At the ends of the two bearings 16 that are close together, the outer ring is limited by a step provided inside the roller 15, and at the ends of the two bearings 16 that are close together, the inner ring is limited by a sleeve 110 fitted onto the shaft portion 141. The pressure caps 18 and the sleeve 110 are detachably fixed to the shaft portion 141, and the end caps 17 are detachably fixed to the roller 15.

[0030] like Figure 3 As shown, this utility model also provides a bridge transport vehicle, including a chassis 2, a carrying platform 3, and a plurality of flat wheel boxes 1 evenly distributed circumferentially. The top plate 11 of the flat wheel box 1 is installed at the bottom of the carrying platform 3, and the rollers 15 of the flat wheel box 1 are in rolling contact with the upper surface of the chassis 2. Among the plurality of flat wheel boxes 1 evenly distributed circumferentially, the second side plates 13 on them are arranged far apart from each other, so that the small diameter end of the conical roller 15 is arranged close to the center.

[0031] This invention solves the problem of rolling friction and sliding friction caused by the mismatch of inner and outer angular velocities in traditional straight rollers during horizontal rotation around a central axis. This is achieved by using a tapered roller to ensure that the entire cross-section of the roller travels at the same angular velocity during rotation. This improves mechanical rotation efficiency, reduces power loss, and enhances mechanical durability.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A plain bearing housing, characterized in that It includes a top plate, a first side plate, a second side plate, a pin, and a roller. The first side plate and the second side plate are connected at intervals to the lower surface of the top plate. The roller is mounted on the pin via a bearing. The pin is mounted on the first side plate and the second side plate. The roller is conical, with its small-diameter end located near the first side plate. A portion of the roller's wheel surface extends out relative to the lower ends of the first side plate and the second side plate.

2. The flat rotary union of claim 1, wherein, The mounting point of the pin on the first side plate forms a distance L1 between it and the top plate, and the mounting point of the pin on the second side plate forms a distance L2 between it and the top plate, where L1 > L2.

3. The flat rotary union of claim 1 wherein, Two bearings are arranged at intervals along the axial direction of the roller. At the ends of the two bearings that are far apart from each other, there are end caps for limiting the outer ring of the bearing and pressure caps for limiting the inner ring of the bearing. The pressure caps are fitted onto the pins, and the end caps are fitted onto the pressure caps.

4. The bushing of claim 1, wherein The pin includes a shaft portion and a retaining plate. The roller is mounted on the shaft portion. The shaft portion passes through the first side plate and the second side plate, and the two ends of the shaft portion are limited by the retaining plate. The retaining plate is connected to the first side plate or the second side plate by bolts.

5. The flat rotary union of claim 1 wherein, A stiffening rib is connected between the second side plate and the top plate, and multiple stiffening ribs are symmetrically arranged on the second side plate.

6. A bridge transport vehicle comprising a chassis and a load carrying platform, characterised in that, It also includes a plurality of flat roller boxes as described in any one of claims 1-5, which are evenly distributed in a circle, with the top plate of the flat roller box installed at the bottom of the bearing platform, and the rollers of the flat roller box making rolling contact with the upper surface of the chassis.

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