Roller support assembly structure for suspension bridge

Abstract

The utility model relates to the technical field of rolling shaft supports for mounting cable saddles of suspension bridges, and particularly discloses a rolling shaft support assembly structure for a suspension bridge, which comprises a rolling shaft support, a lower bearing plate positioned on the bottom side of the rolling shaft support, and an upper bearing plate positioned on the top side of the rolling shaft support, each rolling shaft of the rolling shaft support is in rolling fit with the lower bearing plate and the upper bearing plate according to a set rolling direction; guide stop blocks are formed on the left side and the right side, corresponding to the rolling direction of the rolling shaft support, of the top side of the lower bearing plate in a protruding mode respectively. And each rolling shaft of the rolling shaft support rolls on the top side of the lower bearing plate along the guide stop block according to the set rolling direction. The rolling shaft support is simple in overall structure, easy to machine and form and balanced in stress performance; and the combined assembly process of the rolling shaft support, the upper bearing plate and the lower bearing plate is simple and easy to implement, and the stress performance of the upper bearing plate and the stress performance of the lower bearing plate are relatively balanced. Therefore, the utility model has the technical characteristics of simple structure, easiness in processing and assembling and good stress performance.

Description

Technical Field

[0001] This utility model relates to a roller support for the installation of cable saddles in suspension bridges, specifically a roller support assembly structure for suspension bridges. Background Technology

[0002] In the cable saddle installation structure of suspension bridges, the saddle body with saddle grooves is generally assembled on the base anchored to the top of the tower or anchor block in a form that allows free longitudinal movement (along the direction of the main cable). This serves to withstand the pressure from the main cable and constrain its vertical and lateral displacements. It also adapts to various working conditions, such as the saddle body being pushed onto the base during bridge construction, the saddle body swaying with the main cable, and changes in the main cable's alignment due to dynamic and static load variations after the bridge is completed and put into operation. A typical structural form, commonly referred to as a roller-type cable saddle, is one where the saddle base is supported by roller bearings to accommodate longitudinal displacement of the cable saddle.

[0003] The roller support used in a roller-type cable saddle mainly consists of a support frame and several rollers arranged side-by-side within the space enclosed by the support frame along a predetermined rolling direction (i.e., the longitudinal direction of the cable saddle). Each roller is rotatably mounted on the support frame via end shafts at both ends, and the arc-shaped rolling contact surface of the roller initially extends beyond the corresponding top and bottom edges of the support frame. In the cable saddle installation structure of a suspension bridge, the roller support is arranged such that each roller rests on a lower bearing plate on top of the base via its bottom rolling contact surface, and the cable saddle rests on the rolling contact surface on the top side of each roller via an upper bearing plate on its bottom side. That is, in the assembly structure of the roller support, there is a lower bearing plate on the bottom side and an upper bearing plate on the top side, and each roller of the roller support rolls in cooperation with the lower and upper bearing plates according to the predetermined rolling direction. Such as the technologies disclosed in Chinese patent documents, including "A roller limiting support structure for a suspension bridge cable saddle", publication number CN 114164760 A, publication date March 11, 2022, and "Roller assembly and cable saddle for cable saddle", publication number CN115897386 A, publication date April 4, 2023.

[0004] In the aforementioned roller support assembly structure, to ensure that each roller rolls precisely between the upper and lower bearing plates in the predetermined rolling direction and to prevent axial (i.e., lateral) offset of the saddle during rolling displacement, a guide limiting groove is provided on the rolling contact surface of the roller in the circumferential direction (i.e., perpendicular to the axial direction of the roller in the predetermined rolling direction). Guide keys in the predetermined rolling direction are connected by screws to the corresponding bottom side of the upper bearing plate and top side of the lower bearing plate, as shown in Figure 3 of patent application CN 114164760 A, and also in patent application CN115897386 A. Figure 1 , Figure 2As shown in Figures 5 and 6. However, although this technology enables the rollers of the roller support to roll precisely between the upper and lower bearing plates in a predetermined rolling direction, it has the following technical problems:

[0005] 1. Guide and limiting grooves need to be machined on the rollers of the roller support along the rolling contact surface. Due to the high precision technical requirements, the machining technology is difficult. This is especially prominent for rollers with waist-shaped hole structure at the shaft end profile, because the rolling contact surface on the top side and the rolling contact surface on the bottom side are discontinuous in the circumferential direction, requiring intermittent cutting.

[0006] 2. The guide and limiting groove formed on the rolling contact surface of the roller results in an intermittent arrangement of the corresponding rolling contact surface in the axial direction. This will cause stress concentration at the guide and limiting groove on the corresponding rolling contact surface, which is not conducive to the roller being evenly stressed in the axial direction.

[0007] 3. Mounting grooves for the guide keys need to be machined on the bottom surface of the upper bearing plate and the top surface of the lower bearing plate, which makes the machining process difficult due to the high precision requirements.

[0008] 4. The machining and forming of the guide key mounting groove on the upper / lower bearing plate results in an intermittent arrangement of the hard plate surface of the upper / lower bearing plate in the transverse width direction (corresponding to the transverse direction of the cable saddle). This will cause stress concentration at the guide key mounting groove on the hard plate surface of the upper / lower bearing plate, which is not conducive to the balanced axial force on the upper / lower bearing plate.

[0009] 5. Whether it is the guide key connected to the bottom side of the upper bearing plate or the guide key connected to the top side of the lower bearing plate, they all need to form a key and groove fit with the roller of the roller support. Due to the high precision technical requirements, the assembly technology between the roller support and the upper and lower bearing plates is more difficult.

[0010] In the prior art possessed by the applicant, there is no effective solution to the aforementioned technical problem. Utility Model Content

[0011] The technical objective of this utility model is to provide a simple, easy-to-process and assemble, and stress-bearing roller support assembly structure for suspension bridges, addressing the special characteristics of the aforementioned roller support for suspension bridges and the shortcomings of existing technologies.

[0012] The technical objective of this utility model is achieved through one of the following technical solutions: a roller support assembly structure for a suspension bridge, comprising a roller support, a lower bearing plate located on the bottom side of the roller support, and an upper bearing plate located on the top side of the roller support.

[0013] Each roller of the roller support rolls in accordance with a set rolling direction with the lower bearing plate and the upper bearing plate.

[0014] On the top side of the lower bearing plate, guide blocks are respectively protruded on the left and right sides corresponding to the rolling direction of the roller support.

[0015] Each roller of the roller support rolls along the guide block in a set rolling direction on the top side of the lower bearing plate.

[0016] As one of the preferred technical solutions, the guide block and the lower support plate are separate structures;

[0017] The guide block is fixed to the top side of the lower bearing plate by multiple pins, which are arranged at intervals along the length of the guide block.

[0018] As one of the preferred technical solutions, the protrusion height of the guide block on the top side of the lower bearing plate is flush with the bottom edge of the support frame of the roller support.

[0019] As one of the preferred technical solutions, the rolling contact surfaces of each roller of the roller support are non-interrupted continuous structures in the axial direction.

[0020] As one of the preferred technical solutions, each roller of the roller support has a bottom rolling contact surface that mates with the lower bearing plate and a top rolling contact surface that mates with the upper bearing plate. The bottom rolling contact surface and the top rolling contact surface are discontinuous structures that are interrupted in the circumferential direction, and the shaft end profile forms an oblong hole structure.

[0021] The technical objective of this utility model is achieved through the second technical solution below: a roller support assembly structure for a suspension bridge, including a roller support, a lower bearing plate located on the bottom side of the roller support, and an upper bearing plate located on the top side of the roller support.

[0022] Each roller of the roller support rolls in accordance with a set rolling direction with the lower bearing plate and the upper bearing plate.

[0023] On the bottom side of the upper bearing plate, guide blocks are respectively protruded on the left and right sides corresponding to the rolling direction of the roller support. Each roller of the roller support rolls along the guide blocks on the bottom side of the upper bearing plate in the set rolling direction.

[0024] As one of the preferred technical solutions, the guide block and the upper support plate are separate structures;

[0025] The guide block is fixed to the bottom side of the upper support plate by multiple pins and screws. The pins are arranged at intervals along the length of the guide block, and the screws are arranged at intervals along the length of the guide block. The pins and screws are staggered along the length of the guide block.

[0026] As one of the preferred technical solutions, the protrusion height of the guide block on the bottom side of the upper bearing plate is at least flush with the top edge of the support frame of the roller support.

[0027] As one of the preferred technical solutions, the rolling contact surfaces of each roller of the roller support are non-interrupted continuous structures in the axial direction.

[0028] As one of the preferred technical solutions, each roller of the roller support has a bottom rolling contact surface that mates with the lower bearing plate and a top rolling contact surface that mates with the upper bearing plate. The bottom rolling contact surface and the top rolling contact surface are discontinuous structures that are interrupted in the circumferential direction, and the shaft end profile forms an oblong hole structure.

[0029] The beneficial technical effects of this utility model are as follows: the above-mentioned technical measures are designed to address the special characteristics of the roller bearing for suspension bridges. Guide blocks with raised structures are formed at the left and right shaft ends of the rolling contact surfaces of the rollers on the lower / upper bearing plates, replacing the key and groove convex-concave fit structure in the traditional roller bearing assembly structure. The guide blocks at the left and right shaft ends constrain each roller of the roller bearing to make precise rolling displacement between the upper and lower bearing plates in the set rolling direction. Compared to the traditional roller bearing assembly structure described above, this design only features raised guide blocks at the left and right ends of the rolling contact surface of the roller on the lower / upper bearing plate. The entire rolling contact surface of the roller requires no additional machining beyond forming an arc-shaped rolling cylindrical surface. Furthermore, the hardened surfaces of the lower / upper bearing plate require no additional machining in the rolling displacement area of ​​the mating roller. This results in a simple overall structure for the roller bearing, ease of machining and forming, and balanced stress performance. Moreover, the assembly process between the roller bearing and the upper and lower bearing plates is simple and easy, and the stress performance of the upper and lower bearing plates is relatively balanced. Therefore, the roller bearing assembly structure described above features simple structure, ease of machining and assembly, and good stress performance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0031] Figure 2 for Figure 1 A magnified view of part A in the image.

[0032] The symbols in the diagram mean: 1—roller support; 11—support frame; 12—roller; 2—lower bearing plate; 3—upper bearing plate; 4—guide block; 5—pin; 6—lateral block. Detailed Implementation

[0033] This utility model relates to a roller support for the installation of cable saddles in suspension bridges, specifically a roller support assembly structure for suspension bridges. The main technical solution of this utility model will be described in detail below with reference to several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 1 and Figure 2 The technical solution of this utility model is clearly and thoroughly explained; although other embodiments are not shown in separate drawings, their main structures can still be referred to the drawings of Embodiment 1.

[0034] It should be noted that the accompanying drawings of this utility model are schematic, and unnecessary details have been simplified to clarify the technical purpose of this utility model, so as to avoid obscuring the technical solution contributed by this utility model to the prior art. In addition, the expressions such as "about" and "basically" regarding quantity or fit relationship in the following text mean that reasonable assembly errors and processing errors are allowed in the industry, and do not literally describe absolute quantity or fit relationship.

[0035] Example 1

[0036] See Figure 1 and Figure 2 As shown, this utility model is a roller support assembly structure for installing suspension bridge cable saddles (main cable saddles or cable saddles), which includes a roller support 1, a lower bearing plate 2 located on the bottom side of the roller support 1, and an upper bearing plate 3 located on the top side of the roller support 1.

[0037] The roller support 1 mainly consists of a support frame 11 and several rollers 12 arranged side by side within the space enclosed by the support frame 11 along a predetermined rolling direction (i.e., the longitudinal direction of the saddle). Each roller 12 has a bottom rolling contact surface that matches the lower bearing plate 2 and has an arc-shaped cylindrical structure on the bottom side, and a top rolling contact surface that matches the upper bearing plate 3 and has an arc-shaped cylindrical structure on the top side. The bottom and top rolling contact surfaces of the roller 12 are discontinuous structures that are interrupted in the circumferential direction, and the profile of the shaft end forms an oblong hole structure (of course, if the bottom and top rolling contact surfaces of the roller 12 extend continuously in the circumferential direction, they form a cylindrical structure, which is usually formed by removing the basically symmetrical two sides of the cylindrical structure). At the center of each shaft end of each roller 12, there is a convex end shaft that is formed in the specific axial direction, and the end shaft and the rolling contact surface of the corresponding end form a stepped fit. Each roller 12 is rotatably mounted on the support frame 11 via end shafts at both ends. The top rolling contact surface of the roller 12 extends beyond the top edge of the support frame 11 in the initial state, and the bottom rolling contact surface extends beyond the bottom edge of the support frame 11 in the initial state. In the roller support 1 with the aforementioned structure, each roller 12 rolls in cooperation with the lower bearing plate 2 and the upper bearing plate 3 according to a predetermined rolling direction. The top rolling contact surface of each roller 12 is a continuous structure without interruption in the axial direction, and the bottom rolling contact surface is also a continuous structure without interruption in the axial direction.

[0038] In order to enable the roller support 1 of the above structure to roll in the set rolling direction between the upper bearing plate 3 and the lower bearing plate 2, and to prevent the rollers 12 from axially shifting during the rolling displacement, a guide structure for preventing axial shifting and guiding the rolling displacement is provided on the top surface of the lower bearing plate 2.

[0039] Specifically, on the top surface of the lower bearing plate 2, a guide block 4 is protruding on each of the left and right sides corresponding to the rolling direction of the roller support 1. The length of each guide block 4 on the top surface of the lower bearing plate 2 corresponds to the rolling displacement range of the roller support 1, and the inner surface of each guide block 4 is fitted with the corresponding end face of each roller 12 with a design-allowed rolling displacement guide clearance. In this way, the roller support 1 located on the lower bearing plate 2, with each roller 12 rolling along the guide blocks 4 at the left and right ends of the rollers on the top side of the lower bearing plate 2 in the set rolling direction, prevents axial displacement during the rolling displacement process, effectively replacing the traditional anti-displacement structure of setting guide limiting grooves on the rollers and guide keys on the upper / lower bearing plates.

[0040] The two guide blocks 4 and the lower support plate 2 are separate structures. Each guide block 4 is fixed to the top side of the lower support plate 2 by multiple pins 5, which are arranged at approximately uniform intervals along the length of the guide block 4. That is, multiple pin holes are spaced apart on the top surface of the lower support plate 2, which is used to arrange the corresponding guide blocks 4. Multiple pin holes are also spaced apart along the length of the guide block 4. After the guide blocks 4 are seated in place on the top surface of the lower support plate 2, the pin holes on the guide blocks 4 and the pin holes on the lower support plate 2 have a one-to-one matching relationship. Pins 5 are inserted into each set of matching pin holes to ensure the precise fixed connection of the guide blocks 4 to the lower support plate 2.

[0041] The protrusion height of the guide block 4 on the top surface of the lower bearing plate 2 should not be too high. If it is too high, it will interfere with the support frame 11 of the roller support 1 and also affect the load-bearing performance of the guide block 4 on the lower bearing plate 2. Therefore, the optimal protrusion height of the guide block 4 on the top surface of the lower bearing plate 2 is basically flush with the bottom edge of the support frame 11 of the roller support 1. This achieves the fundamental purpose of guiding and limiting, avoids positional interference with the support frame 11, facilitates assembly, and ensures the stability of its connection on the lower bearing plate 2.

[0042] Of course, in the above-mentioned guide and limiting assembly structure of the upper bearing plate 2 and the roller support 1, a transverse stop 6 is also connected on the lower bearing plate 2 outside the guide stop 4 to constrain the upper bearing plate 3 and the supported saddle body to generate transverse displacement. That is, the upward extension of the transverse stop 6 needs to exceed the roller support 1 and be located on the corresponding outer side of the upper bearing plate 3.

[0043] Example 2

[0044] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0045] Each roller in the roller support is a cylindrical structure, meaning that the profile of the roller end forms a circular structure.

[0046] Example 3

[0047] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0048] The guide block on the top side surface of the lower bearing plate is integrally formed with the lower bearing plate body, that is, a plate is milled to form a raised guide block.

[0049] Although this embodiment can achieve the technical purpose of guiding and limiting the roller support at the shaft end of the present invention, it will increase the manufacturing cost and manufacturing difficulty of the lower bearing plate, and is not the first choice.

[0050] Example 4

[0051] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0052] The guide block is connected to the bottom surface of the upper bearing plate, and its protrusion height on the bottom surface of the upper bearing plate is optimally flush with the top edge of the support frame of the roller support.

[0053] Since the gravity of the guide block affects its connection stability on the bottom surface of the upper bearing plate, in addition to using pins for positioning, the guide block also needs to be fixedly connected to the upper bearing plate with multiple screws. That is, the guide block is fixed to the bottom surface of the upper bearing plate by multiple pins and multiple screws. These pins are arranged at intervals along the length of the guide block, and these screws are arranged at intervals along the length of the guide block. The pins and screws are staggered along the length of the guide block.

[0054] Example 5

[0055] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0056] Based on the guide block connected to the top side surface of the lower bearing plate, a guide block is also connected to the bottom side surface of the upper bearing plate as in Embodiment 4. The upper and lower bearing plates together limit the rolling displacement of each roller of the roller support.

[0057] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0058] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A roller bearing assembly structure for a suspension bridge, comprising a roller bearing (1) and a lower bearing plate (2) located on the bottom side of the roller bearing (1) and an upper bearing plate (3) located on the top side of the roller bearing (1). Each roller (12) of the roller support (1) rolls in cooperation with the lower bearing plate (2) and the upper bearing plate (3) in a set rolling direction; Its features are: On the top side of the lower bearing plate (2), guide blocks (4) are respectively protruded on the left and right sides corresponding to the rolling direction of the roller support (1). Each roller (12) of the roller support (1) rolls along the guide block (4) in the set rolling direction on the top side of the lower bearing plate (2).

2. The suspension bridge roller support assembly structure according to claim 1, characterized in that: The guide block (4) and the lower support plate (2) are separate structures; The guide block (4) is fixed to the top side of the lower bearing plate (2) by multiple pins (5), which are arranged at intervals along the length of the guide block (4).

3. The suspension bridge roller support assembly structure according to claim 1 or 2, characterized in that: The guide block (4) protrudes to the top of the lower bearing plate (2) at a height that is flush with the bottom edge of the support frame (11) of the roller support (1).

4. The suspension bridge roller support assembly structure according to claim 1, characterized in that: The rolling contact surfaces of each roller (12) of the roller support (1) are non-interrupted continuous structures in the axial direction.

5. The suspension bridge roller support assembly structure according to claim 1 or 2, characterized in that: Each roller (12) of the roller support (1) has a bottom rolling contact surface that cooperates with the lower bearing plate (2) and a top rolling contact surface that cooperates with the upper bearing plate (3). The bottom rolling contact surface and the top rolling contact surface are discontinuous structures that are interrupted in the circumferential direction, and the shaft end profile forms a waist-shaped hole structure.

6. A roller bearing assembly structure for a suspension bridge, comprising a roller bearing, a lower bearing plate located on the bottom side of the roller bearing, and an upper bearing plate located on the top side of the roller bearing; Each roller of the roller support rolls in accordance with a set rolling direction with the lower bearing plate and the upper bearing plate. Its features are: On the bottom side of the upper bearing plate, guide blocks are respectively protruded on the left and right sides corresponding to the rolling direction of the roller support. Each roller of the roller support rolls along the guide blocks on the bottom side of the upper bearing plate in the set rolling direction.

7. The suspension bridge roller support assembly structure according to claim 6, characterized in that: The guide block and the upper support plate are separate structures; The guide block is fixed to the bottom side of the upper support plate by multiple pins and screws. The pins are arranged at intervals along the length of the guide block, and the screws are arranged at intervals along the length of the guide block. The pins and screws are staggered along the length of the guide block.

8. The suspension bridge roller support assembly structure according to claim 6 or 7, characterized in that: The guide block protrudes to a height that is flush with the top edge of the support frame of the roller support.

9. The suspension bridge roller support assembly structure according to claim 6, characterized in that: Each roller of the roller support has a continuous, uninterrupted structure in the axial direction for its rolling contact surface.

10. The suspension bridge roller support assembly structure according to claim 6 or 7, characterized in that: Each roller of the roller support has a bottom rolling contact surface that mates with the lower bearing plate and a top rolling contact surface that mates with the upper bearing plate. The bottom rolling contact surface and the top rolling contact surface are discontinuous structures that are interrupted in the circumferential direction, and the shaft end profile forms an oblong hole structure.

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