A high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transportation

Abstract

The present invention discloses a high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit, belonging to the technical field of bridge bearings. By arranging elastic components at the ends of two limit plates opposite to each other laterally at the bottom of the upper seat plate, the gap between the limit plate and the side wall of the lower seat plate can be precisely controlled, which can fully ensure the precise control of the friction pair gap between the upper and lower seat plates while meeting the convenient assembly requirements of the bridge bearing. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit in the present invention has a compact structure and convenient assembly, which can effectively ensure the reliable use of the bridge bearing in the ultra-high-speed maglev rail transit application environment, ensure the assembly accuracy and assembly efficiency of the bridge bearing, improve the deformation resistance of the bridge bearing under the action of lateral load, ensure the smoothness of the maglev rail transit line, meet the application requirements of the bridge bearing in special application environments, avoid lateral torsion of the bridge bearing, and have good application prospects and practical value.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge bearings, and in particular relates to a high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transportation. Background Art

[0002] Magnetic levitation transportation is a new form of rail transportation that uses the attraction or repulsion of the magnetic field to achieve non-contact support and guidance, and uses linear motors to achieve drive. It can solve the problems of wheel-rail adhesion, friction, vibration, etc. that exist in wheel-rail railways, and can break through the speed limit of wheel-rail railways. In recent years, it has gradually become a research hotspot in the field of ground transportation.

[0003] However, with the increase in operating speed, maglev rail transit has increasingly higher requirements for the smoothness of the track line, especially for ultra-high-speed maglev lines, which also puts higher requirements on the functional reliability of maglev rail transit bridge bearings.

[0004] In general, in addition to conventional functions, bridge bearings for maglev rail transit also need to meet the requirements of controlling lateral and vertical deformations. For existing bridge bearings, the focus is mainly on the structural design of how to achieve the functions of height adjustment, position adjustment and tensile resistance of the bearings, but there is less research and attention on the control of the lateral and vertical deformation of the bearings. Due to the high speed of maglev trains, under the action of lateral loads, if the lateral gap and deformation of the bearings are too large, it will affect the smoothness of the line; in addition, the suspension distance of the track is small, and the suspension distance must be guaranteed under dynamic loads. The bearings should meet the requirements of greater stiffness and minimize vertical deformation. It is precisely because of the differences in the above-mentioned operating characteristics that conventional bridge bearings cannot accurately meet the setting requirements under the operating environment of ultra-high-speed maglev rail transit, and it is urgent to optimize the structural form of bridge bearings. Summary of the invention

[0005] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit, which can effectively reduce the transverse bridge clearance of the bearing, reduce the lateral deformation of the line during the operation of maglev transit, ensure the smoothness of the line, and improve the reliability and safety of maglev transit operation.

[0006] To achieve the above-mentioned purpose, the present invention provides a high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit, comprising an upper seat plate, a middle seat plate and a lower seat plate which are matched and arranged in sequence in the vertical direction; limit plates are respectively arranged on both sides of the bottom of the upper seat plate, and the two limit plates extend along the bridge direction respectively, and are arranged opposite to each other with horizontal parts extending horizontally; and the middle seat plate is embedded between the two limit plates; the lower seat plate is arranged below the middle seat plate, and its two sides in the horizontal direction are respectively opposite to the ends of the horizontal parts of the two limit plates; and

[0007] Elastic components are respectively arranged between the ends of the two horizontal portions and the lateral sides of the lower seat plate;

[0008] The elastic component includes a pre-tightening member, an elastic element and a limit baffle which are arranged in sequence;

[0009] The preload member passes through the horizontal portion and the elastic element in sequence, and is connected to the limit baffle at its end; the limit baffle is arranged opposite to the lower seat plate, and can move relative to the horizontal portion under the adjustment of the preload member, thereby compressing or loosening the elastic element, thereby changing the gap between the elastic component and the lateral side wall of the lower seat plate.

[0010] As a further improvement of the present invention, the limit baffle extends along the direction of the bridge, and the pre-tightening members are multiple and spaced apart upward along the bridge.

[0011] As a further improvement of the present invention, the elastic element is a disc spring, a leaf spring or a high modulus polyurethane spring.

[0012] As a further improvement of the present invention, a guide plate is further provided on the side of the limit baffle away from the elastic element, and extends along the bridge direction to form a friction pair with the lower seat plate;

[0013] and / or

[0014] Guide strips are respectively arranged along the bridge direction on the side wall surfaces of the lower seat plate facing the two limit plates.

[0015] As a further improvement of the present invention, the top of the lower seat plate is a cylindrical structure, and a rotating sleeve is sleeved on the outer periphery of the cylindrical structure;

[0016] The rotating sleeve extends along the bridge direction on both sides facing the two limit plates and can rotate around the axis relative to the lower seat plate, so that the friction pair between the rotating sleeve and the two limit plates is always consistent with the bridge direction.

[0017] As a further improvement of the present invention, a support member is provided along the circumferential direction on the outer peripheral wall surface of the lower seat plate for vertically supporting the rotating sleeve.

[0018] As a further improvement of the present invention, guide strips are respectively provided along the bridge direction on both sides of the rotating sleeve facing the two limit plates.

[0019] As a further improvement of the present invention, the preload element and the horizontal portion are threadedly matched, and the preload element is movably connected to the limit baffle, so that the preload element can change the compression amount of the elastic element by relative rotation with the horizontal portion.

[0020] As a further improvement of the present invention, one end of the preload member is fixedly connected to the limit baffle, and the other end thereof passes through the limit plate, and an adjusting nut is matched with the outer thread, and the compression amount of the elastic element is changed by rotating the adjusting nut.

[0021] As a further improvement of the present invention, the middle seat plate and the lower seat plate are matched by spherical surfaces, and a spherical friction pair is provided between the two;

[0022] The spherical friction pair is a metal friction pair or a fiber-reinforced friction pair.

[0023] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0024] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0025] (1) The high-smoothness bridge bearing of the present invention, which is suitable for ultra-high-speed maglev rail transit, has an elastic component disposed at the ends of two limit plates laterally opposite to each other at the bottom of the upper seat plate, so that the gap between the limit plate and the side wall of the lower seat plate can be precisely controlled. While meeting the requirement of convenient assembly of the bridge bearing, it can fully ensure the precise control of the gap between the upper and lower seat plates, improve the deformation resistance of the bridge bearing under the action of lateral load, reduce the lateral deformation of the bridge bearing and even the track beam body, and meet the application requirements of the bridge bearing in the ultra-high-speed maglev rail transit operation environment.

[0026] (2) The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit of the present invention has the advantages of high stiffness, good fatigue performance, high durability, long service life, etc. through the corresponding optimization of the structural form of the elastic component and the corresponding selection of the type of elastic element, and the corresponding arrangement of components such as leaf springs, disc springs or high-modulus polyurethane springs. It can not only meet the compression control requirements during the bearing assembly, but also meet the requirements of normal operation of the bearing. Moreover, since the stiffness of the elastic element is large enough, problems such as relaxation and deformation will not occur. Even if the elastic element is relaxed, it will only make the transverse clearance of the bearing smaller and smaller, significantly reducing the transverse clearance of the bearing, and further improving the bearing's ability to resist deformation in the lateral direction.

[0027] (3) The high-smoothness bridge bearing of the present invention, which is suitable for ultra-high-speed maglev rail transit, has a cylindrical structure at the top of the lower seat plate and a "square" rotating sleeve that can rotate relatively on its outer periphery, so that when the bearing is installed, its bottom structure can be twisted in a certain circumferential angle relative to the top structure, thereby avoiding lateral torsion between the upper and lower seat plates caused by bearing construction errors and causing them to get stuck, thereby ensuring the normal operation of the bearing structure and ensuring that the friction pair between the rotating sleeve and the limit plate is always consistent with the longitudinal direction of the bridge.

[0028] (4) The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit of the present invention effectively overcomes the problem that the existing bridge bearings cannot achieve both "assembly accuracy" and "assembly convenience" through the corresponding arrangement of elastic components. When the assembly accuracy requirement is high, it is necessary to ensure that the assembly gap between the upper and lower bases is small, which makes the actual assembly more difficult. In order to meet the convenience of assembly, the assembly gap between the upper and lower bases needs to be large, which in turn leads to poor deformation resistance between the two. The bearing is very prone to lateral displacement and cannot meet the smoothness requirements of the track and line.

[0029] (5) The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit in the present invention has a compact structure and is easy to assemble. It can effectively ensure the reliable use of the bridge bearing in the application environment of ultra-high-speed maglev rail transit, ensure the assembly accuracy and assembly efficiency of the bridge bearing, improve the deformation resistance of the bridge bearing under lateral load, ensure the smoothness of the maglev rail transit line, meet the application requirements of the bridge bearing in special application environments, avoid lateral torsion of the bridge bearing, and has good application prospects and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the cross-sectional structure of a high-smoothness bridge bearing in a specific embodiment of the present invention;

[0031] Figure 2 It is a plan view of the planar structure of a high-smoothness bridge bearing in a specific embodiment of the present invention;

[0032] Figure 3 It is an enlarged view of the local structure of a high-smoothness bridge bearing in a specific embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of a cross-sectional structure of a high-smoothness bridge bearing in another specific embodiment of the present invention;

[0034] Figure 5 is a plan view of the planar structure of a high-smoothness bridge bearing in another specific embodiment of the present invention;

[0035] Figure 6 is an enlarged view of a local structure of a high-smoothness bridge bearing in another specific embodiment of the present invention;

[0036] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0037] 1. Upper seat plate; 2. Middle seat plate; 3. Lower seat plate; 4. Tensile bolts; 5. Tensile washers; 6. Wedges; 7. Wedge baffles; 8. Adjustment bolts; 9. Force transmission seat plate; 10. Base plate; 11. Height adjustment studs; 12. Spherical friction pair;

[0038] 101. Limiting plate; 102. Elastic component; 1011. Pre-tightening bolt; 1012. Elastic element; 1013. Limiting baffle; 1014. Guide plate; 1015. Connecting nut; 301. Guide strip; 302. Rotating sleeve; 303. Support member. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] Example:

[0045] See also Figure 1 to Figure 3 The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit in the preferred embodiment of the present invention comprises an upper seat plate 1, a middle seat plate 2 and a lower seat plate 3 arranged vertically from top to bottom. The bottom of the upper seat plate 1 is formed with a receiving space for accommodating and limiting the lateral sides of the middle seat plate 2, and the middle seat plate 2 and the lower seat plate 3 are preferably matched by tensile bolts 4 and spherical friction pairs 12 to form a Figure 1 The overall structure shown in .

[0046] Specifically, the upper seat plate 1 in the preferred embodiment is as follows Figure 1 As shown in the figure, its top is a plate-like structure for connecting the beam structure to be supported, and limiting plates 101 are respectively arranged on the lateral sides of its bottom, and the two limiting plates 101 are respectively in an "L-shaped" structure, including a vertical portion extending vertically and connected to the bottom of the upper seat plate 1 and a horizontal portion connected to the bottom end of the vertical portion and extending horizontally; at the same time, the horizontal portions of the two limiting plates 101 are arranged opposite to each other, and a space for accommodating the middle seat plate 2 is formed therebetween, so that the lateral ends of the middle seat plate 2 can be respectively embedded in the space formed between the two horizontal plates and the plate body of the upper seat plate 1.

[0047] like Figure 2 As shown in the figure, the two limit plates 101 in the preferred embodiment extend along the direction of the bridge, that is, when the bridge bearing is actually set, its extension direction is parallel to the extension direction of the bridge.

[0048] Meanwhile, the lower seat plate 3 in the preferred embodiment is arranged below the middle seat plate 2, and its top surface matches the bottom surface of the middle seat plate 2, and the two lateral sides of the top of the lower seat plate 3 are respectively opposite to the horizontal parts of the two limit plates 101. Accordingly, elastic components 102 are respectively arranged at the ends of the two horizontal parts to achieve limit matching with the two lateral sides of the lower seat plate 3.

[0049] In a preferred embodiment, the elastic component 102 is as follows Figure 1As shown in , it includes a pre-tightening bolt 1011 that crosses the horizontal portion, and an elastic element 1012 and a limit baffle 1013 that are sequentially arranged on the side wall surface of the horizontal portion facing the lower seat plate 3, and the end of the pre-tightening bolt 1011 sequentially passes through the elastic element 1012 and the limit baffle 1013, and is matched and connected with the limit baffle 1013. At the same time, by adjusting the pre-tightening bolt 1011, the compression amount of the elastic element 1012 can be correspondingly adjusted, thereby changing the distance between the limit baffle 1013 and the side wall surface of the lower seat plate 3.

[0050] In actual setting, corresponding to the connection of the pre-tightening bolt 1011 on the limiting baffle 1013, a receiving groove is opened on the side of the limiting baffle 1013 away from the elastic element 1012, and a connecting nut 1015 is arranged therein, so that the end of the pre-tightening bolt 1011 can match the connecting nut 1015, and the pre-tightening bolt 1011 and the connecting nut 1015 do not protrude from the notch of the receiving groove. Further preferably, a guide plate 1014 is arranged on the end face of the limiting baffle 1013, which closes the receiving groove, so that the elastic component 102 matches the side wall surface of the lower seat plate 3 through the guide plate 1014. In addition, in actual setting, the limiting plate 101 extends along the bridge direction (i.e. the longitudinal direction of the bridge), and the elastic components 102 are multiple and spaced apart upward along the bridge, such as Figure 2 As shown in , at this time, the guide plate 1014 is also in the shape of a long strip extending along the longitudinal direction of the bridge, and is used to seal the respective accommodating grooves spaced apart on the limiting baffle 1013.

[0051] Furthermore, the connection matching between the pre-tightening bolt 1011 and the horizontal part of the limit plate 101 can be in the form of thread matching. At this time, the through hole of the horizontal part and the pre-tightening bolt 1011 are connected by threads, and the end of the pre-tightening bolt 1011 is movably connected to the receiving groove, so that the pre-tightening bolt 1011 can rotate correspondingly relative to the receiving groove. Through the rotation control between the pre-tightening bolt 1011 and the limit plate 101, the compression amount of the elastic element 1012 can be adjusted, thereby changing the actual thickness of the elastic component 102.

[0052] Of course, in addition to the above-mentioned matching form, the matching between the pre-tightening bolt 1011 and the horizontal part can also be in other forms. For example, the pre-tightening bolt 1011 is a screw with an external thread, the through hole is a smooth hole, and a tightening nut is provided at one end of the pre-tightening bolt 1011 away from the elastic component 102, which matches the thread of the pre-tightening bolt 1011. By turning the tightening nut, the matching length between the pre-tightening bolt 1011 and the horizontal part can be changed, so as to achieve the adjustment of the elastic component 102. Moreover, for the above-mentioned method, the pre-tightening bolt 1011 can be set to be non-rotatable, that is, it can be fixedly connected with the limit baffle 1013.

[0053] In general, there are many optional matching modes between the pre-tightening bolt 1011 and the horizontal portion and the limit baffle 1013 , as long as the compression amount of the elastic element 1012 can be changed by adjusting the pre-tightening bolt 1011 .

[0054] In more detail, the elastic element 1012 in the preferred embodiment is preferably made of a high modulus polyurethane spring, which has the advantages of high rigidity, convenient processing, good fatigue performance, high durability, and long service life, and can fully meet the application in the ultra-high-speed magnetic levitation rail transportation operation environment. Of course, according to the needs of the setting, the elastic element 1012 can also be preferably an elastic material such as a leaf spring or a disc spring.

[0055] In addition, the guide plate 1014 in the preferred embodiment is preferably a stainless steel plate of a certain thickness, which has high smoothness, long service life, and is not easy to deform and damage; accordingly, corresponding to the setting of the elastic component 102, guide strips 301 are respectively provided on both sides of the lower seat plate 3 along the longitudinal direction, and the setting form thereof is as shown in FIG. Figure 3 , Figure 6 As shown in , a stainless steel plate is further preferred.

[0056] In the above preferred embodiment, by arranging the elastic components 102 in pairs on the two limit plates 101 at the bottom of the upper seat plate 1, when the bridge bearing is assembled accordingly, the pre-tightening bolts 1011 can be controlled to compress the elastic components 102 to a certain thickness, thereby increasing the spacing between the two guide plates 1014, and facilitating the assembly of the lower seat plate 3 of the bearing; after the bearing is assembled, the pre-tightening bolts 1011 are loosened so that the elastic element 1012 can restore a certain thickness under the action of the restoring force, thereby achieving precise matching and clearance control of the guide friction pair between the upper seat plate 1 and the lower seat plate 3, significantly reducing the transverse clearance of the bridge bearing, and improving the deformation resistance under the action of lateral loads, thereby improving the smoothness of the bridge structure.

[0057] Furthermore, other structures of the bridge bearing are not the focus of the above preferred embodiments, so they are not introduced in detail. For the convenience of understanding, the corresponding structures are briefly introduced as follows. Among them, the middle seat plate 2 and the lower seat plate 3 are matched through a spherical mating surface, and a spherical friction pair 12 is arranged on the mating surface; at the same time, through holes are respectively opened in the middle of the middle seat plate 2 and the lower seat plate 3, so that the two are matched through structures such as tensile bolts 4 and tensile washers 5, and the tensile washers 5 and the mounting holes on the middle seat plate 2 are also matched through spherical friction pairs 12. In actual settings, the spherical friction pair 12 in the preferred embodiment preferably adopts a metal friction pair or a fiber-reinforced friction pair structure.

[0058] Secondly, a force transmission seat plate 9 and a base plate 10 are correspondingly arranged below the lower seat plate 3 in the preferred embodiment, which are used for connecting the bridge support with structures such as bridge piers; accordingly, bolt holes are opened in the middle of the force transmission seat plate 9 and the middle of the bottom surface of the lower seat plate 3, which are used for adjusting the corresponding connection of the stud 11. At the same time, the bottom surface of the lower seat plate 3 in the preferred embodiment is set as a wedge-shaped surface, and a plurality of wedges 6 are respectively arranged on the lateral sides between the force transmission seat plate 9 and the lower seat plate 3, which are used to support the lateral sides of the lower seat plate 3; accordingly, wedge baffles 7 are respectively arranged on the lateral side wall surfaces of the lower seat plate 3 corresponding to each wedge 6, and an adjusting member is arranged on the wedge baffle 7 for each wedge 6. By adjusting the adjusting member, the embedding depth of the wedges 6 on the lateral sides can be changed, so as to realize reliable support of the wedges 6 after the distance between the lower seat plate 3 and the force transmission seat plate 9 is changed. In addition, an adjusting bolt 8 is also provided corresponding to the height adjusting stud 11, one end of which is matched on the height adjusting stud 11, and the rotation adjustment of the height adjusting stud 11 can be achieved by horizontally pushing the other end thereof; in the actual setting, the height adjusting stud 11 is matched with the opposite rotation directions of the threads at both ends of the lower seat plate 3 and the force transmission seat plate 9 respectively, and the two seat plates can be brought closer or farther away from each other by controlling the rotation of the height adjusting stud 11, thereby completing the height adjustment process.

[0059] By using the combination of the above structures, a Figure 1 The bridge bearing shown in the figure can realize reliable support for the bridge structure, and can realize precise control of the gap between the guide friction pair of the upper seat plate 1 and the lower seat plate 3, thereby improving the bearing's anti-deformation ability under the action of lateral load and ensuring the smoothness of the bridge structure.

[0060] In the above-mentioned preferred embodiment, the lower seat plate 3 of the bridge bearing is preferably a "square" columnar structure, which is matched with the limit plate 101 of the upper seat plate 1 with the side wall surface extending along the bridge direction. This matching form can meet the needs of practical applications to a certain extent. However, since the ultra-high-speed maglev rail transit bridge has very high requirements on the installation accuracy of the bearings, especially for bearings with relatively large longitudinal movable displacements, if errors occur in the bearings during construction, it is very easy to cause lateral torsion between the upper and lower seat plates of the bearings, which may cause the bearings to be stuck due to torsion. Moreover, the displacement of the bridge bearings in the preferred embodiment can reach 600mm, while ordinary bearings usually do not exceed 150mm, which makes the lateral torsion problem of the bridge bearings in the preferred embodiment more prominent.

[0061] Based on the above considerations, in another preferred embodiment of the present invention, there is provided a Figures 4 to 6The bridge bearing shown in the figure is different from the bridge bearing in the aforementioned preferred embodiment in that the bottom of the lower seat plate 3 is configured as a "circular" columnar structure for matching the upper seat plate 1, while the upper seat plate 1 and its bottom limit plate 101 and elastic component 102 are configured in the same manner; accordingly, a rotating sleeve 302 is sleeved on the outer periphery of the "circular" top of the lower seat plate 3, as shown in FIG. Figure 5 as shown in .

[0062] In a preferred embodiment, the rotating sleeve 302 is a square sleeve structure with a circular through hole in the middle, which is sleeved on the top of the lower seat plate 3, and the two side walls that are separated from each other (the two side walls along the bridge direction) are matched with the elastic components 102 at the ends of the two limit plates 101. At the same time, corresponding to the setting of the rotating sleeve 302, a support member 303 is set on the outer periphery of the lower seat plate 3, such as Figure 6 As shown in , it can realize the support of the rotating sleeve 302. In a preferred embodiment, the support member 303 is preferably an angle steel, and after the rotating sleeve 302 is sleeved on the lower seat plate 3, the two can rotate relative to each other, so as to ensure that the friction pair between the rotating sleeve 302 and the limiting plate 101 is always consistent with the longitudinal direction of the bridge, avoiding lateral torsion of the support.

[0063] Preferably, guide strips 301 are respectively provided along the longitudinal direction on both lateral sides of the rotating sleeve 302 to ensure the accuracy of matching between the rotating sleeve 302 and the end of the limiting plate 101 .

[0064] The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit in the present invention has a compact structure and is easy to assemble. It can effectively ensure the reliable use of the bridge bearing in the ultra-high-speed maglev rail transit application environment, ensure the assembly accuracy and assembly efficiency of the bridge bearing, improve the deformation resistance of the bridge bearing under lateral load, ensure the smoothness of the maglev rail transit line, meet the application requirements of the bridge bearing in special application environments, avoid lateral torsion of the bridge bearing, and has good application prospects and practical value.

[0065] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit, comprising an upper seat plate, a middle seat plate and a lower seat plate arranged in sequence in a vertical direction; limit plates are respectively arranged on both sides of the bottom of the upper seat plate, and the two limit plates extend along the bridge direction respectively and are arranged opposite to each other with horizontal parts extending horizontally; and the middle seat plate is embedded between the two limit plates; the lower seat plate is arranged below the middle seat plate, and its two sides are respectively opposite to the ends of the horizontal parts of the two limit plates; it is characterized in that Elastic components are respectively arranged between the ends of the two horizontal portions and the lateral sides of the lower seat plate; The elastic component includes a pre-tightening member, an elastic element and a limit baffle which are arranged in sequence; The preload member passes through the horizontal portion and the elastic element in sequence, and is connected to the limit baffle at its end; the limit baffle is arranged opposite to the lower seat plate, and can move relative to the horizontal portion under the adjustment of the preload member, thereby compressing or loosening the elastic element, thereby changing the gap between the elastic component and the lateral side wall of the lower seat plate.

2. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to claim 1 is characterized in that: The limit baffle extends along the bridge direction, and the pre-tightening members are multiple and spaced apart upward along the bridge.

3. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to claim 1 is characterized in that: The elastic element is a disc spring, a leaf spring or a high modulus polyurethane spring.

4. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to claim 1 is characterized in that: A guide plate is also provided on the side of the limit baffle away from the elastic element, and extends along the bridge direction to form a friction pair with the lower seat plate; and / or Guide strips are respectively arranged along the bridge direction on the side wall surfaces of the lower seat plate facing the two limit plates.

5. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to any one of claims 1 to 4, characterized in that: The top of the lower seat plate is a cylindrical structure, and a rotating sleeve is sleeved on the outer periphery of the cylindrical structure; The rotating sleeve extends along the bridge direction on both sides facing the two limit plates and can rotate around the axis relative to the lower seat plate, so that the friction pair between the rotating sleeve and the two limit plates is always consistent with the bridge direction.

6. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to claim 5, characterized in that: A support member is provided on the outer peripheral wall surface of the lower seat plate along the annular direction for vertically supporting the rotating sleeve.

7. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to claim 5, characterized in that: The two sides of the rotating sleeve facing the two limit plates are respectively provided with guide strips along the bridge direction.

8. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to any one of claims 1 to 4, 6 and 7, characterized in that: The pre-tightening member and the horizontal portion are thread-matched, and the pre-tightening member is movably connected to the limit baffle, so that the pre-tightening member can change the compression amount of the elastic element through relative rotation with the horizontal portion.

9. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to any one of claims 1 to 4, 6 and 7, characterized in that: One end of the preload member is fixedly connected to the limit baffle, and the other end thereof passes through the limit plate. An adjusting nut is matched with the outer thread, and the compression amount of the elastic element can be changed by rotating the adjusting nut.

10. The high-smoothness bridge bearing suitable for ultra-high-speed maglev rail transit according to any one of claims 1 to 4, 6 and 7, characterized in that: The middle seat plate and the lower seat plate are matched by spherical surfaces, and a spherical friction pair is arranged between the two; The spherical friction pair is a metal friction pair or a fiber-reinforced friction pair.

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