Bridge full life support

Abstract

The application discloses a bridge full-life support, which is a steel roller shaft support structure and comprises a plurality of roller shafts arranged side by side, a bottom plate arranged at the bottom side of the roller shafts and a top plate arranged at the top side of the roller shafts, and the plurality of roller shafts can synchronously roll and displace along a set rolling direction between the rolling surfaces of the bottom plate and the top plate; the steel roller shaft support is arranged in a support structure of a bridge, and the rolling direction of the roller shafts and the longitudinal direction of the bridge body are arranged in a non-parallel angle structure. The application can simultaneously satisfy the two-direction displacement corresponding to the longitudinal direction of the bridge body and the transverse width direction of the bridge by using a pair of steel roller shaft supports, and is reliable and flexible.

Description

Technical Field

[0001] This invention relates to bridge support structures, specifically to full-life bearings for bridge supports, and more specifically, to a full-life steel roller bearing for bridge supports. Background Technology

[0002] In bridge structures, to accommodate changes in live loads and / or deformations of the bridge beam, steel roller bearings capable of translation are required in the supporting structure. These bearings primarily consist of multiple rollers arranged side-by-side, a base plate on the bottom side of the rollers, and a top plate on the top side of the rollers. Under load, the rollers synchronously roll along a predetermined direction between the rolling surfaces of the base and top plates to meet the technical requirements for beam displacement on the piers.

[0003] However, in existing steel roller bearings used in bridge support structures, the rolling direction of multiple rollers corresponds either to the longitudinal direction of the bridge beam or to the transverse direction (usually the longitudinal direction). Thus, in a bridge support structure, a single steel roller bearing can only achieve unidirectional displacement corresponding to either the longitudinal or transverse direction of the bridge beam, and cannot simultaneously satisfy bidirectional displacement corresponding to both directions. To satisfy bidirectional displacement corresponding to both directions, at least two steel roller bearings need to be stacked vertically and horizontally with their rolling displacement directions intersecting, as in the technology disclosed in Chinese patent literature entitled "A Full-Life-Cycle Bridge Bearing" (Publication No. CN 115110410 A, Publication Date September 27, 2022).

[0004] This type of structure, which involves multiple steel roller bearings arranged in a crisscrossing manner with the direction of rolling displacement, will increase the cost of the beam support structure on the one hand, and increase the support height between the beam and the pier on the other hand, which is not conducive to the stable support of the beam on the pier.

[0005] Therefore, it is necessary to make technical improvements to the steel roller bearings used in bridge support structures. Summary of the Invention

[0006] The technical objective of this invention is to provide a bridge full-life bearing that can simultaneously satisfy the bidirectional displacements corresponding to the longitudinal and transverse directions of the bridge beam, taking into account the special characteristics of the application of the above-mentioned steel roller bearing in bridge structures and the technical deficiencies of existing steel roller bearings.

[0007] The technical objective of this invention is achieved through the following technical solution: a bridge full-life bearing, wherein the full-life bearing is a steel roller bearing structure, comprising multiple rollers arranged side by side, and a bottom plate arranged at the bottom side and a top plate arranged at the top side of the rollers, wherein the multiple rollers can synchronously roll and displace along a set rolling direction between the rolling surfaces of the bottom plate and the top plate. In the supporting structure of the bridge, the roller of the full-life bearing is configured to roll in a non-parallel angle with the longitudinal direction of the bridge beam.

[0008] The above-mentioned technical measures are designed to address the unique application of steel roller bearings in bridge structures. By setting the rolling direction of multiple rollers of the steel roller bearing to a non-parallel angle with the longitudinal direction of the bridge beam, the supported beam undergoes oblique displacement relative to both the longitudinal and transverse directions of the bridge after being subjected to force. This oblique displacement satisfies the technical requirements for beam displacement in both the longitudinal and transverse directions of the bridge. Thus, a single steel roller bearing can simultaneously meet the bidirectional displacement requirements of the beam in both the longitudinal and transverse directions of the bridge, ensuring reliability and flexibility.

[0009] Compared to the unidirectional displacement steel roller bearings used in bridge support structures, the above-mentioned technical measures can simultaneously satisfy the bidirectional displacements corresponding to the longitudinal and transverse directions of the bridge beam, offering greater flexibility.

[0010] Compared with the superimposed arrangement of multiple steel roller supports with intersecting rolling displacement directions, the above-mentioned technical measures have the advantages of simple structure, low cost, low support height, good stability, and good flexibility.

[0011] The steel roller bearings of the above-mentioned technical measures have a metal-to-metal contact fit between the base plate, the roller and the top plate. They do not contain rubber or polymer materials with relatively limited service life, which is conducive to long-term service with the same life as the bridge, reducing or even avoiding maintenance, and is beneficial to the control of maintenance costs and the improvement of social benefits.

[0012] As one of the preferred options, in the support structure of the bridge, the set rolling direction of the roller shaft and the longitudinal direction of the beam are matched with an acute angle structure, and the included angle satisfies the relationship a=arctan(H / L). In the formula, 'a' is the angle between the set rolling direction of the roller and the longitudinal direction of the bridge beam. H represents the maximum allowable displacement of the beam along the transverse width of the bridge structure. L represents the maximum allowable displacement of the beam along the longitudinal direction of the bridge structure.

[0013] Furthermore, in the supporting structure of the bridge, the maximum allowable displacement of the beam along the transverse width direction of the bridge is 50 to 200 mm, and is an integer multiple of 50 mm; the maximum allowable displacement of the beam along the longitudinal length direction of the bridge is 50 to 500 mm, and is an integer multiple of 50 mm. The angle between the set rolling direction of the roller of the full-life support and the longitudinal direction of the bridge beam is in the range of 5 to 45°.

[0014] The above-mentioned technical measures are aimed at the design conditions for the allowable longitudinal and transverse displacement of the beam in bridge design. In this way, the rolling direction of the steel roller bearing and the fitting angle between the roller bearing and the longitudinal direction of the beam can be accurately, reliably and quickly determined. This is conducive to the accurate and reliable forming of the steel roller bearing for the bridge in service, and accurate and reliable installation in the supporting structure of the bridge in service.

[0015] As one of the preferred embodiments, the rolling surface of the bottom plate and / or the top plate has at least one guide rail arranged along a set rolling direction and formed with a raised structure; The arrangement direction of the guide rails is matched with the longitudinal direction of the bridge beam in a non-parallel angle structure. On the rolling arc surface of the roller, a guide groove corresponding to the corresponding guide rail on the bottom plate and / or the top plate is formed in an inward concave structure along the circumference. The rolling arc surface of the roller shaft is in contact with the rolling surfaces of the base plate and the top plate, and the guide rails on the base plate and / or the top plate are embedded in the corresponding guide grooves of the roller shaft. The roller shaft forms a movable fitting relationship with the corresponding guide rails through the guide grooves, and can make linear rolling displacement on the rolling surfaces of the base plate and the top plate with the rolling arc surface.

[0016] The above-mentioned technical measures, while simultaneously satisfying the bidirectional displacements corresponding to the longitudinal and transverse directions of the bridge beam, further enhance the rolling displacement by separately setting a guiding structure between the roller shaft and the bottom plate and / or top plate. This structure consists of a guide rail on the bottom plate and / or top plate that fits into a guide groove on the roller shaft. This constrains the roller shaft to perform linear rolling displacement along the corresponding guide rail via the guide groove, resulting in more precise, stable, and reliable maintenance of the set rolling direction. It also reliably limits the possible swaying of the roller shaft between the bottom plate and top plate (i.e., axial displacement of the roller shaft under external impact).

[0017] Meanwhile, the plate that maintains synchronous linkage between multiple rollers does not need to bear the guiding function of linear rolling displacement. This allows the guiding function and synchronous linkage function of the rolling displacement of multiple rollers between the bottom and top plates to be relatively separated and implemented independently. Therefore, the synchronous linkage structure of the rollers in the above-mentioned technical measures experiences less stress and has a lower failure rate, which is beneficial to improving the stability, reliability, and longevity of the steel roller support. It also allows all rollers to be synchronously linked using segmented multi-piece connecting plates in an interlocking manner, thereby reducing processing and assembly errors during the forming of the steel roller support, as well as reducing the cumulative rolling errors generated during roller rolling in service after forming. This not only reduces the technical difficulty of forming but also improves the accuracy of the rolling displacement of all rollers and the stability, reliability, and longevity of their service.

[0018] Furthermore, the guide rail arrangement direction of the bottom plate and / or the top plate is matched with the length direction of the bottom plate / top plate in a non-parallel angle structure. In the supporting structure of the bridge, the length directions of the bottom plate and the top plate are aligned with the longitudinal direction of the bridge beam in a parallel structure.

[0019] The above-mentioned technical measures correspond to the current design allowable displacement range of the beam on the bridge pier. The length direction of the bottom plate and top plate of the steel roller bearing is parallel to the longitudinal direction of the bridge, while the guide structure of the roller bearing for rolling displacement is non-parallel to the longitudinal direction of the bridge. This forms obliquely arranged guide rails on the bottom plate and / or top plate, ensuring that the center of the roller's rolling displacement is always within the support range of the bridge pier. This reduces the requirements for the forming dimensions of the bridge pier and is also beneficial for the installation and construction of the steel roller bearing in the bridge support structure.

[0020] Furthermore, the guide rails on the base plate and / or the top plate are arranged in a parallel structure with the length direction of the base plate / top plate. In the supporting structure of the bridge, the length directions of the bottom plate and the top plate are aligned with the longitudinal direction of the beam in a non-parallel angle structure.

[0021] The aforementioned technical measures are based on steel roller bearings with guide structures. By using the non-parallel angle between the length direction of the bottom and top plates of the steel roller bearings and the longitudinal direction of the bridge, bidirectional displacement corresponding to the longitudinal and transverse directions of the bridge beams can be achieved. This can be easily implemented without significant structural modifications to existing steel roller bearing structures, resulting in a regular and compact forming structure. However, this type of steel roller bearing, with slight modifications to existing bearings and inclined arrangement in the bridge support structure, may cause the center of the roller rolling displacement to deviate from the support range of a typical bridge pier due to the matching of the bottom and top plates with the roller's rolling range. Therefore, it is necessary to increase the structural dimensions of the pier to improve the support range.

[0022] Furthermore, the guide rail has a trapezoidal cross-section with a narrow top and a wide bottom; The guide groove on the roller shaft has a trapezoidal cross-section with a narrow bottom and a wide opening. The height of the protrusion of the guide rail on the base plate and / or the top plate is less than the depth of the corresponding guide groove on the roller shaft, and the guide rail is in rolling contact with the two side walls of the corresponding guide groove through the two side inclined surfaces.

[0023] The fitting structure between the roller and the base plate and / or top plate of the above-mentioned technical measures is conducive to easy, efficient and high-precision assembly between the roller and the base plate and / or top plate; on the other hand, the roller moves smoothly and has good stability and reliability as it rolls on the corresponding guide rails of the base plate and / or top plate through the guide groove.

[0024] Furthermore, the inclined surfaces on both sides of the guide rail and the corresponding groove walls on both sides are engaged in rolling contact using a self-lubricating structure. This technical measure can further improve the smoothness of the roller's rolling displacement on the corresponding guide rails of the bottom plate and / or top plate as it passes through the guide groove.

[0025] Furthermore, the guide rails on the rolling surfaces of the base plate and / or the top plate are arranged in a spacing of 2 to 4. Even further, the guide rails on the rolling surfaces of the base plate and / or the top plate are arranged in a spacing of 2. This technical measure reliably satisfies the guiding function and anti-sway function of rolling displacement, while simplifying the forming structure of the base plate and / or the top plate, and reducing the material usage and manufacturing cost of the base plate or top plate.

[0026] Furthermore, the roller shaft has a two-sided beveled structure, the top side area between the two beveled planes is a top side rolling arc surface formed by an arc-shaped outward convex structure, the bottom side area between the two beveled planes is a bottom side rolling arc surface formed by an arc-shaped outward convex structure, and the end face outer contour line trajectory of the roller shaft is waist-shaped. The roller shaft contacts and engages with the rolling surface of the top plate through the rolling arc surface on the top side; The roller shaft contacts and engages with the rolling surface of the base plate through the bottom rolling arc surface; At least three rollers are arranged between the rolling surfaces of the bottom plate and the top plate, and are divided into multiple groups with two adjacent rollers as a group, and adjacent roller groups share the middle roller. Each roller assembly has two connecting plates, one upper and one lower, hinged to the same shaft end. The upper connecting plate is hinged to the upper end shaft at the corresponding end of the roller shaft in the roller shaft group. The upper end shaft is arranged in an axially eccentric structure at the corresponding end of the roller shaft. The upper connecting plates hinged to the same shaft end of adjacent roller shaft groups are independently fitted, and the upper connecting plates hinged to the same shaft end of adjacent roller shaft groups are staggered at the shaft end of the shared roller shaft in the middle. The lower connecting plate is hinged to the lower end shaft at the corresponding end of the roller shaft in the roller shaft group. The lower end shaft is arranged in an axially concentric structure at the corresponding end of the roller shaft and is located below the upper end shaft. The lower connecting plates hinged to the same shaft end of adjacent roller shaft groups are independently fitted, and the lower connecting plates hinged to the same shaft end of adjacent roller shaft groups are staggered at the shaft end of the shared roller shaft in the middle. The two rollers in each roller group are fitted with a clearance.

[0027] The above-mentioned technical measures are designed for rollers with beveled edges on both sides, which have the special characteristic of only producing half a circumferential rolling stroke during rolling. As a result, upper and lower connecting plates are formed at the same shaft end of the roller group. The lower connecting plate reliably maintains the fitting clearance between the side-by-side and spaced rollers, improving stability. The upper connecting plate reliably achieves the consistency of the rotation angle of each roller, improving the synchronous linkage accuracy of each roller in the roller group during the rolling displacement process and avoiding overtravel of each roller in the circumferential direction.

[0028] The aforementioned synchronous linkage structure between multiple rollers, based on the independent guide structure set between the rollers and the base plate and / or top plate, eliminates the guiding task of the synchronous linkage structure between multiple rollers. This allows the synchronous linkage structure to only perform the synchronous linkage function without needing to consider the guiding function. Thus, to reduce machining and assembly errors during the forming of the steel roller support, and to reduce the cumulative errors generated by the rollers rolling during service after forming, the forming technology difficulty is reduced.

[0029] The above-mentioned technical measures use multiple connecting plates in pairs, segmented at the same end of all rollers, to achieve synchronous linkage. This synchronous linkage structure, whether it is the forming structure of the connecting plate or the hinge structure between the connecting plate and the corresponding roller group, greatly reduces the forming technical difficulty and forming size error (including assembly error). It is beneficial to improve the accuracy of rolling displacement, as well as the strength, stability and reliability of the connecting plate's stress structure.

[0030] Alternatively, as another possible alternative to the above-mentioned roller shaft, the roller shaft has a circular structure and all circumferential contour surfaces are rolling arc surfaces; The roller shaft contacts and engages with the rolling surfaces of the bottom plate and the top plate respectively through the circumferential rolling arc surface; At least three rollers are arranged between the rolling surfaces of the bottom plate and the top plate, and are divided into multiple groups with two adjacent rollers as a group, and adjacent roller groups share the middle roller. A connecting plate is hinged to the same shaft end of each roller group. The connecting plate is hinged to the center end shaft of the corresponding shaft end of the roller group. The center end shaft is arranged in an axially concentric structure at the corresponding shaft end of the roller. The connecting plates hinged to the same shaft end of adjacent roller shaft groups are independently fitted, and the connecting plates hinged to the same shaft end of adjacent roller shaft groups are staggered at the shaft end of the shared roller shaft in the middle. The two rollers in each roller group are fitted with a clearance.

[0031] The above-mentioned technical measures are designed for the special characteristics of circular rollers. Connecting plates are arranged at the central shaft end of the same shaft end of the roller group. The connecting plates reliably maintain the fitting clearance between the parallel and spaced rollers. There is no need to consider the consistency of the rotation angle of each roller. The structure is simple, the stability is high, and the synchronous linkage is precise.

[0032] The aforementioned synchronous linkage structure between multiple rollers, based on the independent guide structure set between the rollers and the base plate and / or top plate, eliminates the guiding task of the synchronous linkage structure between multiple rollers. This allows the synchronous linkage structure to only perform the synchronous linkage function without needing to consider the guiding function. Thus, to reduce machining and assembly errors during the forming of the steel roller support, and to reduce the cumulative errors generated by the rollers rolling during service after forming, the forming technology difficulty is reduced.

[0033] The above-mentioned technical measures use multiple connecting plates in pairs, segmented at the same end of all rollers, to achieve synchronous linkage. This synchronous linkage structure, whether it is the forming structure of the connecting plate or the hinge structure between the connecting plate and the corresponding roller group, greatly reduces the forming technical difficulty and forming size error (including assembly error). It is beneficial to improve the accuracy of rolling displacement, as well as the strength, stability and reliability of the connecting plate's stress structure.

[0034] The beneficial technical effects of this invention are as follows: The above-mentioned technical measures are designed to address the special characteristics of steel roller bearings in bridge structures. By using the set rolling direction of the rollers of the steel roller bearing to match the non-parallel angle of the longitudinal direction of the bridge beam, the supported beam can undergo oblique displacement relative to both the longitudinal and transverse directions of the bridge after being subjected to force. This oblique displacement can satisfy the technical requirements for the beam's displacement in both the longitudinal and transverse directions of the bridge. Thus, a single steel roller bearing can simultaneously satisfy the bidirectional displacement of the beam corresponding to both the longitudinal and transverse directions of the bridge, making it reliable and flexible. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of one structure of the present invention (with the top plate removed).

[0036] Figure 2 for Figure 1 The front view of the steel roller shaft support shown (including the top plate).

[0037] Figure 3 for Figure 2 The three-dimensional perspective view of the steel roller shaft support shown (with the linkage structure removed).

[0038] Figure 4 for Figure 1 , Figure 2 , Figure 3 A schematic diagram of the base plate structure.

[0039] Figure 5 for Figure 1 , Figure 2 , Figure 3 A schematic diagram of the roller structure.

[0040] Figure 6 for Figure 5 Side view.

[0041] Figure 7 for Figure 1 , Figure 2 , Figure 3 A magnified view of the roller shaft and the base plate connected by guide rails.

[0042] Figure 8This is another structural schematic diagram of the present invention.

[0043] Figure 9 for Figure 8 The front view of the steel roller shaft support shown.

[0044] Figure 10 for Figure 8 , Figure 9 A schematic diagram of the base plate structure.

[0045] The symbols in the diagram have the following meanings: 1—base plate; 11—bottom side guide rail; 12—bottom side limiting protrusion; 2—roller shaft; 21—top side rolling arc surface; 22—edge-cutting plane; 23—top side guide groove; 24—lower end shaft; 25—upper end shaft; 26—bottom side rolling arc surface; 27—bottom side guide groove; 3—lower connecting plate; 4—upper connecting plate; 5—top plate; 51—top side guide rail; 52—top side limiting protrusion; x—bridge transverse width direction; y—bridge longitudinal length direction. Detailed Implementation

[0046] This invention relates to bridge support structures, specifically to full-life bearings for bridge supports, and more specifically, to a full-life steel roller bearing for bridge supports. The main technical content of this invention will be described in detail below with several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The technical solution of the present invention will be clearly and thoroughly explained; Embodiment 2 is illustrated in conjunction with the accompanying drawings. Figure 8 , Figure 9 , Figure 10 , Figure 5 , Figure 6 and Figure 7 The technical solution of the present invention is clearly and in detail explained; although other embodiments are not shown in separate drawings, their main structure can still be referred to the drawings of Embodiment 1 or Embodiment 2.

[0047] It should be noted that the accompanying drawings of this invention are schematic, and unnecessary details have been simplified in order to clarify the technical objectives of this invention, so as to avoid obscuring the technical solutions contributed by this invention to the prior art.

[0048] Example 1 See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the present invention is a steel roller bearing for bridges, which is used in conjunction with a ball joint bearing in the bridge support structure. The ball joint bearing is located on the upper side, and the steel roller bearing is located on the lower side.

[0049] The steel roller support of the present invention is mainly composed of a base plate 1, multiple rollers 2 and a top plate 5.

[0050] The base plate 1 is a rectangular structure with a length greater than its width, and it is connected to multiple pier anchor bolts extending downward from one side of the bottom surface. The bottom surface of the base plate 1 serves as the corresponding pier for the bridge. The top surface of the base plate 1 is flat and smooth, excluding the bottom side guide rail 11 and the bottom side limiting protrusion 12 described below. The top surface of the base plate 1 serves as the rolling surface that rolls into contact with the roller 2 described below.

[0051] In the supporting structure of a bridge, the beam body corresponds to the bridge width direction, which is the bridge transverse width direction (x), and the beam body corresponds to the bridge length direction, which is the bridge longitudinal length direction (y).

[0052] The base plate 1 of the aforementioned steel roller bearing is substantially parallel to the longitudinal y-center of the bridge beam, with its length direction center being aligned with the center of the beam. The base plate 1 is fixed to the pier via anchor bolts. Compared to existing steel roller bearings where the length direction center of the base plate is substantially parallel to the longitudinal y-center of the bridge, the fixing structure of this base plate 1 on the pier is essentially the same as the existing base plate arrangement.

[0053] Compared to the center of the base plate 1 along its length, a non-parallel oblique direction (basically a set of diagonal directions close to the base plate 1) is used as the set rolling direction for the multiple rollers 2. At both ends of the set rolling direction on the base plate 1, bottom side limiting protrusions 12 are welded and formed on one side of the rolling surface—that is, they are formed upwards. In other words, the bottom side limiting protrusions 12 are formed between the center of the base plate 1 along its length and the side corner.

[0054] On the rolling surface of the base plate 1, two bottom side guide rails 11 are arranged in an upward protruding structure along the set rolling direction. That is, the length direction of these two bottom side guide rails 11 corresponds to the set rolling direction on the base plate 1 (oblique to the center of the length direction). They are located between the bottom side limiting protrusions 12 at both ends of the set rolling direction on the base plate 1, and are basically perpendicular to the bottom side limiting protrusions 12 at the corresponding ends. The two bottom side guide rails 11 are arranged at intervals along the rolling width on the base plate 1.

[0055] The two bottom side guide rails 11 on the base plate 1 are arranged in a non-parallel angle structure with the center of the length direction of the base plate 1, that is, the two bottom side guide rails 11 are arranged at an angle on the pier with respect to the center of the longitudinal direction y of the bridge.

[0056] The two bottom guide rails 11 on the base plate 1 have basically the same structure. Each bottom guide rail 11 has a trapezoidal cross-section with a narrow top and a wide bottom. The inclined surfaces and vertical surfaces on both sides of the bottom guide rail 11 form an angle of about 30 to 50 degrees. If this angle is too small, it will not be conducive to the smooth rolling of the roller 2 on the base plate 1 along the bottom guide rail 11; if this angle is too large, it will not be conducive to the guidance and axial limitation of the roller 2 by the bottom guide rail 11.

[0057] Each roller 2 has a beveled edge structure on both sides, and its end face outer contour is similar to a rectangle, or in other words, its end face outer contour forming a waist-shaped trajectory. To achieve its rolling displacement on the base plate 1, the top and bottom contours of the roller 2 are respectively outwardly convex arc-shaped contours. Specifically, the top side region between the two beveled edge planes 22 of the roller 2 is a top side rolling arc surface 21 with an outwardly convex arc structure, and the bottom side region between the two beveled edge planes 22 is a bottom side rolling arc surface 26 with an outwardly convex arc structure. The top side rolling arc surface 21 and the bottom side rolling arc surface 26 of the roller 2 lie on the same virtual circular trajectory.

[0058] At the center of the two ends of each roller 2, there is an outwardly extending end shaft, namely a lower end shaft 24. The axis of the lower end shaft 24 is basically concentric with the axis of the roller 2. That is to say, the top rolling arc surface 21 and the bottom rolling arc surface 26 of the roller 2 are located on the same virtual circle with the lower end shaft 24 as the axis.

[0059] Each roller 2 has an outwardly extending end shaft, namely an upper end shaft 25, located outside the central region of each of its two ends. The upper end shaft 25 is located outside the lower end shaft 24. In application, when the roller 2 maintains its initial circumferential positioning, the bottom rolling arc surface 26 is below and the top rolling arc surface 21 is above, and they are basically aligned. The upper end shaft 25 is basically directly above the lower end shaft 24, basically close to the rolling arc surface, and the upper end shaft 25 is basically located at the center of the two chamfered edge planes 22.

[0060] On the top rolling arc surface 21 and bottom rolling arc surface 26 of each roller 2, guide grooves corresponding to the two bottom guide rails 11 on the base plate 1 are formed in a concave structure along the circumference. That is, two top guide grooves 23 are formed on the top rolling arc surface 21, and two bottom guide grooves 27 are formed on the bottom rolling arc surface 26. The circumferential centers of the top guide grooves 23 and bottom guide grooves 27 on the same circumference of the roller 2 are basically corresponding.

[0061] Corresponding to the outline structure of the bottom side guide rail 11 on the base plate 1, the guide groove on the roller 2 has a trapezoidal structure with a narrow bottom and a wide opening. The bottom side guide groove 27 can match the corresponding bottom side guide rail 11, and the depth of the bottom side guide groove 27 is slightly greater than the protrusion height of the corresponding bottom side guide rail 11.

[0062] The forming structures of multiple (more than three) rollers 2 are basically the same.

[0063] These rollers 2 are arranged side by side with their respective chamfered surfaces 22 facing each other. Of course, a clearance should be maintained between adjacent rollers 2 to facilitate the rolling displacement requirements.

[0064] Multiple rollers 2 arranged side by side are divided into multiple groups, with each group consisting of two adjacent rollers 2. Adjacent groups share a central roller 2. For example, there are a total of five rollers: a, b, c, d, and e. Rollers a and b form one group, rollers b and c form another group, and roller b is shared by roller groups ab and bc; similarly, rollers b and c form one group, rollers c and d form another group, and roller c is shared by roller groups bc and cd… Each roller assembly has two connecting plates, namely the upper connecting plate 4 and the lower connecting plate 3, hinged to the same shaft end.

[0065] The length of the lower connecting plate 3 corresponds to the arrangement distance of the two rollers 2 in the current roller group. The lower connecting plate 3 is hinged to the lower end shaft 24 of the corresponding end of the roller 2 in the roller group. The lower connecting plates 3 hinged to the same shaft end of adjacent roller groups are independently engaged, and the lower connecting plates 3 hinged to the same shaft end of adjacent roller groups are staggered at the shaft end of the shared roller 2 in the middle. Thus, these rollers 2 are synchronously linked by multiple lower connecting plates 3 in a staggered connection manner, and the two rollers 2 in each roller group are engaged with a gap. Based on the hinge structure of the lower connecting plate 3 at the axis at the end of the roller 2, it only serves to maintain the spacing of the hinged roller group and does not perform consistent control of the rotation angle.

[0066] Similarly, the length of the upper connecting plate 4 corresponds to the arrangement distance of the two rollers 2 in the current roller group. The upper connecting plate 4 is hinged to the upper shaft 25 at the corresponding end of the roller 2 in the roller group. The upper connecting plates 4 hinged to the same shaft end of adjacent roller groups are independently engaged, and the upper connecting plates 4 hinged to the same shaft end of adjacent roller groups are staggered at the shaft end of the shared roller 2 in the middle, so that these rollers 2 are synchronously linked by multiple upper connecting plates 4 in a staggered connection manner. Based on the eccentric hinge structure of the upper connecting plate 4 at the end of the roller 2, it plays a role in consistent control of the rotation angle of the hinged roller group, and also achieves the function of maintaining the spacing to a certain extent.

[0067] The synchronous linkage structure at both ends of the above-mentioned multiple rollers 2 is consistent, thus forming a roller assembly that can synchronously link along a set rolling direction.

[0068] The roller assembly, constructed according to the above structure, sits on the rolling surface of the base plate 1 along a predetermined rolling direction. During placement, the two bottom guide grooves 27 on the bottom rolling arc surface 26 of each roller 2 are embedded into the two corresponding bottom guide rails 11 on the rolling surface of the base plate 1. That is, the bottom guide rails 11 on the base plate 1 are embedded into the corresponding bottom guide grooves 27 on the bottom rolling arc surface 26 of each roller 2. The bottom guide rails 11 are in rolling contact with the side walls of the corresponding bottom guide grooves 27 via their inclined surfaces (having a micro-gap sufficient for rolling displacement). In other words, each roller 2 forms a movable, rollable fit with the corresponding bottom guide rail 11 on the rolling surface of the base plate 1 through its own bottom guide groove 27. Once in place, each roller 2 is in contact with the rolling surface of the base plate 1 through its bottom rolling arc surface 26.

[0069] Due to the fit between the depth of the bottom guide groove 27 and the corresponding protrusion height of the bottom guide rail 11, the bottom of the bottom guide groove 27 of each roller shaft 2, when in place, is fitted with the top of the corresponding bottom guide rail 11 with a clearance, thereby reducing the frictional resistance of rolling displacement. Of course, to further reduce the frictional resistance of rolling displacement and improve the smoothness and stability of rolling displacement, it is best to provide self-lubricating friction pair structures—such as copper plates—between the inclined surfaces on both sides of the bottom guide rail 11 and the side walls of the corresponding bottom guide groove 27, so as to achieve rolling contact fit through self-lubricating friction structures.

[0070] The mating structure of the top plate 5 and the roller assembly is basically a mirror image of the bottom plate 1 described above.

[0071] Specifically, the top plate 5 is the lower seat plate of the ball joint support, its top surface is used as the upper seat plate of the ball joint support, and its bottom surface is used as the rolling surface of the roller shaft assembly.

[0072] The top plate 5 is a rectangular structure with a length greater than its width, and its bottom surface is flat and smooth, except for the top side guide rail 51 and the top side limiting protrusion 52 described below. The bottom surface of the top plate 5 serves as the rolling surface that rolls into contact with the roller shaft 2 described below.

[0073] In the bridge support structure, the top plate 5 of the aforementioned steel roller bearing is basically parallel to the center of the beam in the longitudinal direction y of the bridge. The top plate 5 is indirectly fixed to the beam through a ball joint bearing. Compared with the existing steel roller bearing where the center of the top plate in the longitudinal direction is basically parallel to the center of the beam in the longitudinal direction y, the fixing structure of the top plate 5 on the beam is basically the same as the existing top plate arrangement structure.

[0074] Compared to the center of the length direction of the top plate 5, a non-parallel oblique direction (basically a set of diagonal directions close to the top plate 5) is formed as the set rolling direction for the multiple rollers 2. At both ends of the set rolling direction on the top plate 5, a top side limiting protrusion 52 is welded and formed on one side of the rolling surface - that is, a downward protrusion. That is, the current top side limiting protrusion 52 is formed between the center of the length direction and the side corner on the top plate 5.

[0075] On the rolling surface of the top plate 5, two top side guide rails 51 are arranged in a downward protruding structure along the set rolling direction. That is, the length direction of these two top side guide rails 51 corresponds to the set rolling direction on the top plate 5 (oblique to the center of the length direction). They are located between the top side limiting protrusions 52 at both ends of the set rolling direction on the top plate 5, and are basically perpendicular to the corresponding top side limiting protrusions 52. The two top side guide rails 51 are arranged at intervals along the rolling width on the top plate 5.

[0076] The two top side guide rails 51 on the top plate 5 are arranged in a non-parallel angle with the center of the length direction of the top plate 5, that is, the two top side guide rails 51 are arranged at an angle on the beam with respect to the center of the longitudinal direction y of the bridge.

[0077] The two top side guide rails 51 on the top plate 5 have basically the same structure. Each top side guide rail 51 has a trapezoidal cross-section with a narrow top and a wide bottom. Each top side guide rail 51 matches the corresponding top side guide groove 23 on the top side rolling arc surface 21 of the roller 2, and the protrusion height of the top side guide rail 51 is slightly less than the depth of the corresponding top side guide groove 23.

[0078] The aforementioned top plate 5 rests on the top of the roller assembly—namely, the top side rolling arc surface 21—via its rolling surface. During placement, the two top side guide grooves 23 on the top side rolling arc surface 21 of each roller 2 are embedded into the two corresponding top side guide rails 51 on the rolling surface of the top plate 5. That is, the top side guide rails 51 on the top plate 5 are embedded into the corresponding top side guide grooves 23 on the top side rolling arc surface 21 of each roller 2. The top side guide rails 51 are in rolling contact with the side walls of the corresponding top side guide grooves 23 via their inclined surfaces (having a micro-gap sufficient for rolling displacement). In other words, each roller 2 forms a movable, rollable fit with the corresponding top side guide rail 51 on the rolling surface of the top plate 5 through its own top side guide groove 23. The top plate 5, once in place, contacts and engages with the top side rolling arc surface 21 of each roller 2 via its rolling surface.

[0079] Due to the fit between the depth of the top guide groove 23 and the corresponding protrusion height of the top guide rail 51, the top of the top plate 5 and the bottom of the top guide groove 23 of each roller shaft 2 are fitted with a clearance, thereby reducing the frictional resistance of rolling displacement. Of course, to further reduce the frictional resistance of rolling displacement and improve the smoothness and stability of rolling displacement, it is best to provide self-lubricating friction pair structures—such as copper plates—between the inclined surfaces on both sides of the top guide rail 51 and the side walls of the corresponding top guide groove 23, so as to achieve rolling contact fit through self-lubricating friction structures.

[0080] With the above structure, each roller 2 of the steel roller support can make rolling contact with the bottom plate 1 on the bottom side and the top plate 5 on the top side through its own rolling arc surface. After being subjected to force, it can make linear rolling motion between the rolling surfaces of the bottom plate 1 and the top plate 5. Each roller 2 rolls synchronously between the rolling surfaces of the bottom plate 1 and the top plate 5 under the control of the linkage structure at both ends of the axial direction.

[0081] With the above structure, the bottom guide rail 11 and the top guide rail 51 are arranged in a non-parallel angle structure with the center of the bridge longitudinal direction y of the beam, and the angle of this non-parallel angle structure is in the range of 5 to 45°.

[0082] Specifically, the values ​​of the aforementioned mating angles should follow (i.e. satisfy) the following relationship: a = arctan(H / L); In the formula, 'a' is the angle between the set rolling direction of the roller and the longitudinal direction of the bridge beam. H represents the maximum allowable displacement of the beam along the transverse width of the bridge structure. L represents the maximum allowable displacement of the beam along the longitudinal direction of the bridge structure.

[0083] In the design of bridge support structures, the maximum allowable displacement of the beam along the transverse width direction (x, i.e., the secondary displacement direction) is 50–200 mm (the specific value depends on the specific bridge design requirements), and within this range, it is an integer multiple of 50 mm, i.e., 50 mm, 100 mm, 150 mm, or 200 mm. The maximum allowable displacement of the beam along the longitudinal length direction (y, i.e., the primary displacement direction) is 50–500 mm (the specific value depends on the specific bridge design requirements), and within this range, it is an integer multiple of 50 mm, i.e., 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, or 500 mm. Based on these design displacement values ​​for the bridge support structure and the above relationships, the angle between the set rolling direction of the roller 2 of the steel roller bearing and the center of the beam along the longitudinal length direction (y) of the bridge ranges from 5° to 45°.

[0084] For example, suppose in the current bridge design, the maximum allowable displacement of the beam along the bridge's transverse width (x) is 50 mm, and the maximum allowable displacement along the bridge's longitudinal length (y) is 100 mm. In this case, the angle between the roller's set rolling direction and the beam's longitudinal direction is approximately 26.5°. Alternatively, suppose in the current bridge design, the maximum allowable displacement of the beam along the bridge's transverse width (x) is 50 mm, and the maximum allowable displacement along the beam's longitudinal length (y) is 300 mm. In this case, the angle between the roller's set rolling direction and the beam's longitudinal direction is approximately 9.5°. Finally, suppose in the current bridge design, the maximum allowable displacement of the beam along the bridge's transverse width (x) is 50 mm, and the maximum allowable displacement along the beam's longitudinal length (y) is 50 mm. In this case, the angle between the roller's set rolling direction and the beam's longitudinal direction is approximately 45°.

[0085] Example 2 See Figure 8 , Figure 9 , Figure 10 , Figure 5 , Figure 6 and Figure 7 As shown, the present invention is a steel roller bearing for bridges, which is used in conjunction with a ball joint bearing in the bridge structure, with the ball joint bearing on the upper side and the steel roller bearing on the lower side.

[0086] The steel roller support of the present invention is mainly composed of a base plate 1, multiple rollers 2 and a top plate 5.

[0087] The base plate 1 is a rectangular structure with a length greater than its width, and it is connected to multiple pier anchor bolts extending downward from one side of the bottom surface. The bottom surface of the base plate 1 serves as the corresponding pier for the bridge. The top surface of the base plate 1 is flat and smooth, excluding the bottom side guide rail 11 and the bottom side limiting protrusion 12 described below. The top surface of the base plate 1 serves as the rolling surface that rolls into contact with the roller 2 described below.

[0088] The length direction of the base plate 1 is the set rolling direction of the multiple rollers 2. At both ends of the length direction of the base plate 1, there are bottom side limiting protrusions 12 that are raised on one side of the rolling surface - that is, raised upward.

[0089] On the rolling surface of the base plate 1, two bottom side guide rails 11 are arranged in an upward protruding structure along a set rolling direction. That is, the length direction of these two bottom side guide rails 11 corresponds to the length direction of the base plate 1, and they are located between the bottom side limiting protrusions 12 at both ends of the length direction of the base plate 1. They are basically perpendicular to the bottom side limiting protrusions 12 at the corresponding ends. The two bottom side guide rails 11 are arranged at intervals along the rolling width on the base plate 1.

[0090] The two bottom side guide rails 11 on the base plate 1 are arranged in a parallel structure with the center of the length direction of the base plate 1.

[0091] The two bottom guide rails 11 on the base plate 1 have basically the same structure. Each bottom guide rail 11 has a trapezoidal cross-section with a narrow top and a wide bottom. The inclined surfaces and vertical surfaces on both sides of the bottom guide rail 11 form an angle of about 30 to 50 degrees. If this angle is too small, it will not be conducive to the smooth rolling of the roller 2 on the base plate 1 along the bottom guide rail 11; if this angle is too large, it will not be conducive to the guidance and axial limitation of the roller 2 by the bottom guide rail 11.

[0092] Each roller 2 has a beveled edge structure on both sides, and its end face outer contour is similar to a rectangle, or in other words, its end face outer contour forming a waist-shaped trajectory. To achieve its rolling displacement on the base plate 1, the top and bottom contours of the roller 2 are respectively outwardly convex arc-shaped contours. Specifically, the top side region between the two beveled edge planes 22 of the roller 2 is a top side rolling arc surface 21 with an outwardly convex arc structure, and the bottom side region between the two beveled edge planes 22 is a bottom side rolling arc surface 26 with an outwardly convex arc structure. The top side rolling arc surface 21 and the bottom side rolling arc surface 26 of the roller 2 lie on the same virtual circular trajectory.

[0093] At the center of the two ends of each roller 2, there is an outwardly extending end shaft, namely a lower end shaft 24. The axis of the lower end shaft 24 is basically concentric with the axis of the roller 2. That is to say, the top rolling arc surface 21 and the bottom rolling arc surface 26 of the roller 2 are located on the same virtual circle with the lower end shaft 24 as the axis.

[0094] Each roller 2 has an outwardly extending end shaft, namely an upper end shaft 25, located outside the central region of each of its two ends. The upper end shaft 25 is located outside the lower end shaft 24. In application, when the roller 2 maintains its initial circumferential positioning, the bottom rolling arc surface 26 is below and the top rolling arc surface 21 is above, and they are basically aligned. The upper end shaft 25 is basically directly above the lower end shaft 24, basically close to the rolling arc surface, and the upper end shaft 25 is basically located at the center of the two chamfered edge planes 22.

[0095] On the top rolling arc surface 21 and bottom rolling arc surface 26 of each roller 2, guide grooves corresponding to the two bottom guide rails 11 on the base plate 1 are formed in a concave structure along the circumference. That is, two top guide grooves 23 are formed on the top rolling arc surface 21, and two bottom guide grooves 27 are formed on the bottom rolling arc surface 26. The circumferential centers of the top guide grooves 23 and bottom guide grooves 27 on the same circumference of the roller 2 are basically corresponding.

[0096] Corresponding to the outline structure of the bottom side guide rail 11 on the base plate 1, the guide groove on the roller 2 has a trapezoidal structure with a narrow bottom and a wide opening. The bottom side guide groove 27 can match the corresponding bottom side guide rail 11, and the depth of the bottom side guide groove 27 is slightly greater than the protrusion height of the corresponding bottom side guide rail 11.

[0097] The forming structures of multiple (more than three) rollers 2 are basically the same.

[0098] These rollers 2 are arranged side by side with their respective chamfered surfaces 22 facing each other. Of course, a clearance should be maintained between adjacent rollers 2 to facilitate the rolling displacement requirements.

[0099] Multiple rollers 2 arranged side by side are divided into multiple groups, with each group consisting of two adjacent rollers 2. Adjacent groups share a central roller 2. For example, there are a total of five rollers: a, b, c, d, and e. Rollers a and b form one group, rollers b and c form another group, and roller b is shared by roller groups ab and bc; similarly, rollers b and c form one group, rollers c and d form another group, and roller c is shared by roller groups bc and cd… Each roller assembly has two connecting plates, namely the upper connecting plate 4 and the lower connecting plate 3, hinged to the same shaft end.

[0100] The length of the lower connecting plate 3 corresponds to the arrangement distance of the two rollers 2 in the current roller group. The lower connecting plate 3 is hinged to the lower end shaft 24 of the corresponding end of the roller 2 in the roller group. The lower connecting plates 3 hinged to the same shaft end of adjacent roller groups are independently engaged, and the lower connecting plates 3 hinged to the same shaft end of adjacent roller groups are staggered at the shaft end of the shared roller 2 in the middle. Thus, these rollers 2 are synchronously linked by multiple lower connecting plates 3 in a staggered connection manner, and the two rollers 2 in each roller group are engaged with a gap. Based on the hinge structure of the lower connecting plate 3 at the axis at the end of the roller 2, it only serves to maintain the spacing of the hinged roller group and does not perform consistent control of the rotation angle.

[0101] Similarly, the length of the upper connecting plate 4 corresponds to the arrangement distance of the two rollers 2 in the current roller group. The upper connecting plate 4 is hinged to the upper shaft 25 at the corresponding end of the roller 2 in the roller group. The upper connecting plates 4 hinged to the same shaft end of adjacent roller groups are independently engaged, and the upper connecting plates 4 hinged to the same shaft end of adjacent roller groups are staggered at the shaft end of the shared roller 2 in the middle, so that these rollers 2 are synchronously linked by multiple upper connecting plates 4 in a staggered connection manner. Based on the eccentric hinge structure of the upper connecting plate 4 at the end of the roller 2, it plays a role in consistent control of the rotation angle of the hinged roller group, and also achieves the function of maintaining the spacing to a certain extent.

[0102] The synchronous linkage structure at both ends of the above-mentioned multiple rollers 2 is consistent, thus forming a roller assembly that can synchronously link along a set rolling direction.

[0103] The roller assembly, constructed according to the above structure, sits on the rolling surface of the base plate 1 along its length. During placement, the two bottom guide grooves 27 on the bottom rolling arc surface 26 of each roller 2 are embedded into the two corresponding bottom guide rails 11 on the rolling surface of the base plate 1. That is, the bottom guide rails 11 on the base plate 1 are embedded into the corresponding bottom guide grooves 27 on the bottom rolling arc surface 26 of each roller 2. The bottom guide rails 11 are in rolling contact with the side walls of the corresponding bottom guide grooves 27 via their inclined surfaces (having a micro-gap sufficient for rolling displacement). In other words, each roller 2 forms a movable, rollable fit with the corresponding bottom guide rail 11 on the rolling surface of the base plate 1 through its own bottom guide groove 27. Once in place, each roller 2 is in contact with the rolling surface of the base plate 1 through its bottom rolling arc surface 26.

[0104] Due to the fit between the depth of the bottom guide groove 27 and the corresponding protrusion height of the bottom guide rail 11, the bottom of the bottom guide groove 27 of each roller shaft 2, when in place, is fitted with the top of the corresponding bottom guide rail 11 with a clearance, thereby reducing the frictional resistance of rolling displacement. Of course, to further reduce the frictional resistance of rolling displacement and improve the smoothness and stability of rolling displacement, it is best to provide self-lubricating friction pair structures—such as copper plates—between the inclined surfaces on both sides of the bottom guide rail 11 and the side walls of the corresponding bottom guide groove 27, so as to achieve rolling contact fit through self-lubricating friction structures.

[0105] The mating structure of the top plate 5 and the roller assembly is basically a mirror image of the bottom plate 1 described above.

[0106] Specifically, the top plate 5 is the lower seat plate of the ball joint support, its top surface is used as the upper seat plate of the ball joint support, and its bottom surface is used as the rolling surface of the roller shaft assembly.

[0107] The top plate 5 is a rectangular structure with a length greater than its width, and its bottom surface is flat and smooth, except for the top side guide rail 51 and the top side limiting protrusion 52 described below. The bottom surface of the top plate 5 serves as the rolling surface that rolls into contact with the roller shaft 2 described below.

[0108] The length direction of the top plate 5 is the set rolling direction of the multiple rollers 2. At both ends of the length direction of the top plate 5, there are top side limiting protrusions 52 that are protruded on one side of the rolling surface - that is, protruded downward.

[0109] On the rolling surface of the top plate 5, two top side guide rails 51 are arranged in a downward protruding structure along the set rolling direction. That is, the length direction of these two top side guide rails 51 corresponds to the length direction of the top plate 5, and they are located between the top side limiting protrusions 52 at both ends of the length direction of the top plate 5. They are basically perpendicular to the top side limiting protrusions 52 at the corresponding ends. The two top side guide rails 51 are arranged at intervals along the rolling width on the top plate 5.

[0110] The two top side guide rails 51 on the top plate 5 are arranged in a parallel structure with the center of the length direction of the top plate 5.

[0111] The two top side guide rails 51 on the top plate 5 have basically the same structure. Each top side guide rail 51 has a trapezoidal cross-section with a narrow top and a wide bottom. Each top side guide rail 51 matches the corresponding top side guide groove 23 on the top side rolling arc surface 21 of the roller 2, and the protrusion height of the top side guide rail 51 is slightly less than the depth of the corresponding top side guide groove 23.

[0112] The aforementioned top plate 5 rests on the top of the roller assembly—namely, the top side rolling arc surface 21—via its rolling surface. During placement, the two top side guide grooves 23 on the top side rolling arc surface 21 of each roller 2 are embedded into the two corresponding top side guide rails 51 on the rolling surface of the top plate 5. That is, the top side guide rails 51 on the top plate 5 are embedded into the corresponding top side guide grooves 23 on the top side rolling arc surface 21 of each roller 2. The top side guide rails 51 are in rolling contact with the side walls of the corresponding top side guide grooves 23 via their inclined surfaces (having a micro-gap sufficient for rolling displacement). In other words, each roller 2 forms a movable, rollable fit with the corresponding top side guide rail 51 on the rolling surface of the top plate 5 through its own top side guide groove 23. The top plate 5, once in place, contacts and engages with the top side rolling arc surface 21 of each roller 2 via its rolling surface.

[0113] Due to the fit between the depth of the top guide groove 23 and the corresponding protrusion height of the top guide rail 51, the top of the top plate 5 and the bottom of the top guide groove 23 of each roller shaft 2 are fitted with a clearance, thereby reducing the frictional resistance of rolling displacement. Of course, to further reduce the frictional resistance of rolling displacement and improve the smoothness and stability of rolling displacement, it is best to provide self-lubricating friction pair structures—such as copper plates—between the inclined surfaces on both sides of the top guide rail 51 and the side walls of the corresponding top guide groove 23, so as to achieve rolling contact fit through self-lubricating friction structures.

[0114] With the above structure, each roller 2 of the steel roller support can make rolling contact with the bottom plate 1 on the bottom side and the top plate 5 on the top side through its own rolling arc surface. After being subjected to force, it can make linear rolling motion between the rolling surfaces of the bottom plate 1 and the top plate 5. Each roller 2 rolls synchronously between the rolling surfaces of the bottom plate 1 and the top plate 5 under the control of the linkage structure at both ends of the axial direction.

[0115] In the supporting structure of a bridge, the beam body corresponds to the bridge width direction, which is the bridge transverse width direction (x), and the beam body corresponds to the bridge length direction, which is the bridge longitudinal length direction (y).

[0116] The bottom plate 1 and top plate 5 of the aforementioned steel roller bearing are respectively fitted with a non-parallel angle structure between their length direction (i.e., the forming direction of the guide rail) and the longitudinal direction y of the bridge beam. The bottom plate 1 is fixed to the pier by the anchor bolts connected to it. Compared with the existing steel roller bearing where the center of the bottom plate in the length direction is basically parallel to the longitudinal direction y of the bridge, this bottom plate 1 is arranged at an angle with its center in the length direction. The top plate 5 is indirectly fixed to the beam by a ball joint bearing. Compared with the existing steel roller bearing where the center of the top plate in the length direction is basically parallel to the longitudinal direction y of the bridge, this top plate 5 is arranged at an angle with its center in the length direction.

[0117] The included angle of the above-mentioned non-parallel angular structures ranges from 5 to 50°, and should specifically satisfy the following relationship: a = arctan(H / L); In the formula, 'a' is the angle between the set rolling direction of the roller and the longitudinal direction of the bridge beam. H represents the maximum allowable displacement of the beam along the transverse width of the bridge structure. L represents the maximum allowable displacement of the beam along the longitudinal direction of the bridge structure.

[0118] In the design of bridge support structures, the maximum allowable displacement of the beam along the transverse width direction (x) of the bridge is 50–200 mm (the specific value depends on the specific bridge design requirements), and within this range, it is an integer multiple of 50 mm, i.e., 50 mm, 100 mm, 150 mm, or 200 mm. The maximum allowable displacement of the beam along the longitudinal length direction (y) of the bridge is 50–500 mm (the specific value depends on the specific bridge design requirements), and within this range, it is an integer multiple of 50 mm, i.e., 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, or 500 mm. Based on these design displacement values ​​for the bridge support structure and the above relationships, the angle between the set rolling direction of the roller 2 of the steel roller bearing and the center of the beam along the longitudinal length direction (y) of the bridge ranges from 5° to 45°.

[0119] For example, suppose in the current bridge design, the maximum allowable displacement of the beam along the bridge's transverse width (x) is 50 mm, and the maximum allowable displacement along the bridge's longitudinal length (y) is 100 mm. In this case, the angle between the roller's set rolling direction and the beam's longitudinal direction is approximately 26.5°. Alternatively, suppose in the current bridge design, the maximum allowable displacement of the beam along the bridge's transverse width (x) is 50 mm, and the maximum allowable displacement along the beam's longitudinal length (y) is 300 mm. In this case, the angle between the roller's set rolling direction and the beam's longitudinal direction is approximately 9.5°. Finally, suppose in the current bridge design, the maximum allowable displacement of the beam along the bridge's transverse width (x) is 100 mm, and the maximum allowable displacement along the beam's longitudinal length (y) is 100 mm. In this case, the angle between the roller's set rolling direction and the beam's longitudinal direction is approximately 45°.

[0120] Example 3 The rest of the content of this embodiment is the same as that of embodiment 1 or 2, except that: Each roller has a circular structure, and its circumferential contour surface is a rolling arc surface.

[0121] At the center of each of the two ends of each roller, there is an outwardly extending end shaft, namely a center end shaft. The axis of the center end shaft is basically concentric with the axis of the roller. In other words, the rolling arc surface of the roller is centered on the center end shaft.

[0122] On the rolling arc surface of each roller, guide grooves are formed in a concave structure along the circumference, corresponding to the two bottom side guide rails on the base plate. That is, two spaced, circumferentially arranged guide grooves are formed on the rolling arc surface. Corresponding to the contour structure of the bottom side guide rails on the base plate, the guide grooves on the rollers have a trapezoidal cross-section with a narrow bottom and a wide opening. The guide grooves can fit into the corresponding bottom side guide rails, and the depth of the guide grooves is slightly greater than the protrusion height of the corresponding bottom side guide rails.

[0123] The forming structure of multiple (more than three) rollers is basically the same. These rollers are arranged side by side, and of course, a fitting clearance should be maintained between adjacent rollers to facilitate the rolling displacement requirements.

[0124] Multiple rollers arranged side-by-side are divided into groups of two adjacent rollers, with adjacent groups sharing a middle roller. For example, there are a total of five rollers: a, b, c, d, and e. Rollers a and b form one group, rollers b and c form another group, and so on. Roller b is shared by roller group ab and roller group bc; and so on. Rollers b and c form one group, rollers c and d form another group, and roller c is shared by roller group bc and roller group cd… Each roller group has a connecting plate hinged to the same end of its shaft. The length of this connecting plate corresponds to the spacing between the two rollers in the current roller group. The connecting plate is hinged to the center end of the corresponding roller in its roller group. The connecting plates hinged to the same end of adjacent roller groups are independently fitted together, and the connecting plates hinged to the same end of adjacent roller groups are staggered at the shaft end of the shared roller in the middle. This allows these rollers to be synchronously linked by multiple connecting plates in pairs in a staggered connection manner, with a clearance fit between the two rollers in each roller group.

[0125] The synchronous linkage structure at both ends of the above-mentioned multiple rollers is consistent, thus forming a roller assembly that can synchronously link along a set rolling direction.

[0126] Example 4 The rest of the content of this embodiment is the same as that of embodiment 1, 2 or 3, except that: The bottom plate of the steel roller bearing is the upper plate of the ball joint bearing (or other type of bearing), and the bottom plate is indirectly fixed to the top of the corresponding pier through the ball joint bearing. The top plate of the steel roller bearing is directly fixed to the bottom of the beam using beam anchor bolts.

[0127] Example 5 The rest of the content of this embodiment is the same as that of embodiment 1, 2 or 3, except that: In bridge support structures, the bottom plate of the steel roller bearing is directly fixed to the top of the corresponding pier through pier anchor bolts, and the top plate of the steel roller bearing is directly fixed to the bottom of the beam through beam anchor bolts.

[0128] Example 6 The rest of the content of this embodiment is the same as that of embodiments 1, 2 or 3, except that: The linkage structure of the roller assembly adopts the traditional integral linkage plate molding.

[0129] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0130] 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, such as one or three guide rails on the bottom plate and / or top plate of the steel roller support; 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 bridge bearing with a full lifespan, characterized in that: The full-life support is a single-pair steel roller bearing structure, which, in the support structure of a bridge, enables the supported beam to undergo oblique displacement relative to the longitudinal (y) and transverse (x) directions of the bridge after being subjected to force. The full-life support includes multiple rollers (2) arranged side by side and capable of synchronous linkage, a base plate (1) arranged on the bottom side of the rollers (2) and in contact with the bottom rolling arc surface (26) of each roller (2), and a top plate (5) arranged on the top side of the rollers (2) and in contact with the top rolling arc surface (21) of each roller (2). The multiple rollers (2) can synchronously roll and displace along a set rolling direction between the rolling surfaces of the base plate (1) and the top plate (5), and the set rolling direction of the rollers (2) and the longitudinal direction (y) of the bridge beam are in a non-parallel angle structure that satisfies the following relationship: a = arctan(H / L); In the formula, 'a' is the angle between the set rolling direction of the roller and the longitudinal direction of the bridge beam. H represents the maximum allowable displacement of the beam along the transverse width of the bridge structure. L represents the maximum allowable displacement of the beam along the longitudinal direction of the bridge structure.

2. The bridge full-life bearing according to claim 1, characterized in that: In the supporting structure of a bridge, the maximum allowable displacement of the beam along the transverse width direction (x) of the bridge is 50 to 200 mm, and the maximum allowable displacement of the beam along the longitudinal length direction (y) of the bridge is 50 to 500 mm. The set rolling direction of the roller (2) of the full-life support has an angle between the angle between the roller and the longitudinal direction (y) of the bridge beam and the angle between the roller and the bearing is 5 to 45°.

3. The bridge full-life bearing according to claim 1, characterized in that: The rolling surface of the bottom plate (1) and / or the top plate (5) has at least one guide rail arranged along a set rolling direction and formed with a raised structure; The arrangement direction of the guide rails is in a non-parallel angle structure with the longitudinal direction (y) of the bridge beam. On the rolling arc surface of the roller (2), a guide groove corresponding to the guide rail on the bottom plate (1) and / or the top plate (5) is formed in a concave structure along the circumference; The rolling arc surface of the roller (2) is in contact with the rolling surfaces of the base plate (1) and the top plate (5), and the guide rails on the base plate (1) and / or the top plate (5) are embedded in the corresponding guide grooves of the roller (2). The roller (2) forms a movable fitting relationship with the corresponding guide rails through the guide grooves, and can make linear rolling displacement on the rolling surfaces of the base plate (1) and the top plate (5) with the rolling arc surface.

4. The bridge full-life bearing according to claim 3, characterized in that: The guide rail arrangement direction of the bottom plate (1) and / or the top plate (5) is in a non-parallel angle structure with the length direction of the bottom plate (1) / top plate (5); In the supporting structure of the bridge, the length directions of the bottom plate (1) and the top plate (5) are parallel to the longitudinal direction (y) of the bridge beam.

5. The bridge full-life bearing according to claim 3, characterized in that: The direction of the guide rail arrangement on the bottom plate (1) and / or the top plate (5) is parallel to the length direction of the bottom plate (1) / top plate (5); In the supporting structure of the bridge, the length directions of the bottom plate (1) and the top plate (5) are aligned with the longitudinal direction (y) of the beam in a non-parallel angle structure.

6. The bridge full-life bearing according to claim 3, characterized in that: The roller shaft has a circular structure, and its circumferential contour surface is a rolling arc surface; The roller shaft contacts and engages with the rolling surfaces of the bottom plate and the top plate respectively through the circumferential rolling arc surface; At least three rollers are arranged between the rolling surfaces of the bottom plate and the top plate, and are divided into multiple groups with two adjacent rollers as a group, and adjacent roller groups share the middle roller. A connecting plate is hinged to the same shaft end of each roller group. The connecting plate is hinged to the center end shaft of the corresponding shaft end of the roller group. The center end shaft is arranged in an axially concentric structure at the corresponding shaft end of the roller. The connecting plates hinged to the same shaft end of adjacent roller shaft groups are independently fitted, and the connecting plates hinged to the same shaft end of adjacent roller shaft groups are staggered at the shaft end of the shared roller shaft in the middle. The two rollers in each roller group are fitted with a clearance.

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