Movable anti-drawing plate type rubber support

Abstract

The utility model belongs to the technical field of plate type supports, and particularly relates to a movable anti-drawing plate type rubber support. The novel plate-type rubber support comprises an upper support plate, a lower support plate and a support body arranged between the upper support plate and the lower support plate, a top plate of the support body is rotationally connected with the upper support plate through a spherical surface, a pull rod is arranged in the center of the spherical surface, and at least one end of the pull rod is connected with the top plate or the upper support plate through an axial rotating mechanism; the novel plate-type rubber support is connected through internal rotation, has anti-drawing performance, and has the advantages of being flexible in rotation adjustment and firm in longitudinal connection.

Description

Technical Field

[0001] The utility model belongs to the technical field of plate-type supports, and specifically relates to a movable anti-pulling plate-type rubber support. Background Art

[0002] Bridge bearings are important structural components that connect the superstructure and substructure of a bridge. They can reliably transmit the reaction force and deformation (displacement and rotation) of the superstructure to the substructure, so that the actual stress conditions of the structure are consistent with the theoretical calculations. Among them, plate rubber bearings are the most widely used.

[0003] At present, most plate rubber bearings have simple structures and traditional forms. They generally lack internal rotation and anti-pullout functions, so their seismic isolation performance is restricted. Secondly, when the beam has lateral and longitudinal slopes, general plate rubber bearings are difficult to adapt to the environment, which may cause problems such as slippage of the beam and the bearing, thereby causing changes in the force transmitted to the piers, and even causing the piers to deviate.

[0004] Some plate bearings are adjusted by installing a leveling steel plate that is consistent with the slope of the bridge between the bottom of the beam and the bearing. For example, the upper steel plate of the PTFE plate rubber bearing can be processed into a leveling steel plate with a corresponding slope for adjustment. When the beam has both a longitudinal slope and a transverse slope, two leveling steel plates with slopes corresponding to the longitudinal and transverse slopes of the bridge are installed between the bottom of the beam and the bearing for adjustment. However, this leveling steel plate needs to be processed and designed according to the specific slope of the beam, which is not suitable for a variety of bridge structures, has low versatility, and cannot be mass-produced; secondly, when the bridge tilts for various reasons or the bridge deck gradually rises, this leveling steel plate cannot be automatically adjusted. Under some special working conditions, the bridge may generate a certain upward pull when it vibrates, and ordinary plate rubber bearings do not have the function of resisting the upward pull of the structure and cannot meet the needs of structural functions. Utility Model Content

[0005] The utility model aims to provide a novel plate-type rubber support with internal rotation connection and anti-pullout performance, which has the characteristics of flexible rotation adjustment and reliable longitudinal connection.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A movable anti-pullout plate-type rubber bearing comprises an upper bearing plate, a lower bearing plate and a bearing body placed therebetween, characterized in that the top plate of the bearing body is connected to the upper bearing plate by spherical rotation, a pull rod is arranged at the center of the sphere, and at least one end of the pull rod is connected to the top plate or the upper bearing plate by an axial rotation mechanism.

[0008] Additional technical features of the above-mentioned movable anti-pulling plate rubber bearing include:

[0009] ——The surface of the top plate is set as a spherical crown curved surface, the bottom surface of the upper support plate is provided with a spherical groove matched with the spherical crown curved surface, the axial rotation mechanism includes a stepped through hole arranged at the center of the spherical groove, the center of the top plate is provided with a threaded hole, the pull rod is a bolt passing through the through hole, the lower end screw is connected to the threaded hole, and the upper end nut is placed on the step of the through hole;

[0010] The axial rotation mechanism comprises sleeve holes respectively arranged on the upper support plate and the top plate, the positions of the sleeve holes are corresponding, the upper and lower ends of the pull rod respectively pass through the sleeve holes and a sphere with a cross section larger than the sleeve hole is arranged at the end thereof, and the sphere is in sliding contact with the sleeve holes of the upper support plate and the top plate through a spherical surface;

[0011] The support body includes a rubber base and a stiffening steel plate, wherein the stiffening steel plates are stacked and spaced inside the rubber base, and the upper part of the rubber base and the top plate, and the lower part of the rubber base and the lower support plate are bonded together by thermal vulcanization;

[0012] ——A friction pair adapted to the spherical curvature is arranged at the spherical rotation connection between the top plate and the upper support plate, and the friction pair is composed of a stainless steel slide plate and a modified polytetrafluoroethylene wear-resistant plate.

[0013] Compared with the prior art, the movable pull-out resistant plate-type rubber bearing provided by the utility model has the following advantages: the top plate and the upper support plate of the support body of the plate-type rubber bearing are connected by a spherical rotation, thereby realizing the horizontal rotation of the upper support plate and the support body, adapting to the multi-directional displacement requirements of the upper support plate (beam body), and having a good vibration reduction effect; further, a pull rod is arranged at the spherical center of the spherical rotation connection, and at least one end of the pull rod is connected to the top plate or the upper support plate by an axial rotation mechanism, that is, the pull rod realizes the longitudinal positioning of the upper support plate and the support body, and can meet the spherical rotation requirements, thereby improving the problem of the longitudinal pull-out resistance performance defects of the traditional plate-type rubber bearing, and having the advantages of simple and compact structure, convenient use, safety and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a movable anti-pulling plate type rubber bearing of the utility model;

[0015] Figure 2 It is a partial schematic diagram of another structure of the support axial rotation mechanism. DETAILED DESCRIPTION

[0016] The structure and working principle of the new plate rubber bearing provided by the utility model are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "top", "bottom", etc. 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set / provided with" 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. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0019] like Figure 1 As shown, the structure of the new plate-type rubber bearing includes an upper bearing plate 1, a lower bearing plate 2 and a bearing body 3 placed therebetween, the top plate 30 of the bearing body 3 is connected to the upper bearing plate 1 via a spherical rotation 4, a pull rod 5 is arranged at the center of the sphere, and at least one end of the pull rod 5 is connected to the top plate 30 or the upper bearing plate 1 via an axial rotation mechanism 6.

[0020] Its working principle is as follows: the upper bearing plate 1 of the plate-type rubber bearing is connected to the beam body (or connected to the embedded steel plate on the bottom of the beam body), the lower bearing plate 2 is connected to the bridge pier (pad stone), and the bearing body 3 (rubber plate seat) is installed between the upper and lower bearing plates 2. The top plate 30 of the bearing body 3 is in contact with the upper bearing plate 1 through the spherical rotation 4, so that the horizontal rotation of the two is realized. The spherical center at the spherical rotation point is connected to the top plate 30 and the upper bearing plate 1 respectively through the pull rod 5, so as to realize longitudinal positioning and anti-pullout performance. Since one end of the pull rod 5 is connected to the top plate 30 or the upper bearing plate 1 through the axial rotation mechanism 6, it is ensured that the horizontal rotation is not restricted by the longitudinal connection.

[0021] In the structure constituting the above-mentioned new plate rubber bearing,

[0022] In one embodiment, the surface of the top plate 30 is set as a spherical crown curved surface 41, the bottom surface of the upper support plate 1 is provided with a spherical groove 42 matched with the spherical crown curved surface 41, the axial rotation mechanism 6 includes a stepped through hole 62 arranged at the center of the spherical groove 42, the center of the top plate 30 is provided with a threaded hole 61, the pull rod 5 is a bolt passing through the through hole 62, the lower end screw is connected to the threaded hole 61, and the upper end nut is placed on the step of the through hole 62. The structure is simple and compact, easy to process and manufacture, the spherical surface is flexible to rotate, and the bolt is stably positioned in the longitudinal direction;

[0023] --like Figure 2 As shown, in another embodiment, the axial rotation mechanism 6 includes sleeve holes 71 respectively arranged on the upper support plate 1 and the top plate 30, the positions of the sleeve holes 71 correspond, the upper and lower ends of the pull rod 5 respectively pass through the sleeve holes 71 and the ends thereof are provided with spheres 72 with a cross section larger than the sleeve holes 71, the spheres 72 are in contact with the sleeve holes 71 of the upper support plate 1 and the top plate 30 through spherical sliding 73, so that the vertical constraint does not hinder the upper support plate 1 and the top plate 30 (support body 3) from rotating horizontally and tilting and swinging each other, according to the change of the slope of the beam body, it swings left and right to adapt to the self-adjustment of the support slope, the spheres at both ends of the pull rod 5 are respectively imprisoned by the sleeve holes 71 of the upper support plate 1 and the top plate 30, the vertical pulling force is increased, thereby limiting the longitudinal displacement amplitude of the two, and enhancing the overall anti-pullout performance, the axial rotation structure is compact, the longitudinal force is balanced, and the anti-falling beam effect is good;

[0024] ——Furthermore, the support body 3 includes a rubber base 31 and a stiffening steel plate 32. The stiffening steel plates 32 are stacked and spaced inside the rubber base 31. The upper part of the rubber base 31 is bonded to the top plate 30, and the lower part of the rubber base 31 is bonded to the lower support plate 2 by hot vulcanization. The overall structure of the support has high strength, is easy to process and manufacture, and is also convenient for upgrading and transforming the existing plate-type rubber support.

[0025] ——Preferably, a friction pair 8 adapted to the spherical curvature is provided at the spherical rotation 4 connection between the top plate 30 and the upper support plate 1. The friction pair 8 is composed of a stainless steel slide plate and a modified polytetrafluoroethylene wear-resistant plate, which improves the sliding efficiency and service life between the top plate 30 (support body 3) and the upper support plate 1, reduces the maintenance cost of the plate rubber support, is safe, practical and economical. Similarly, the friction pair 8 can also be provided at the contact between the ball of the axial rotation mechanism 6 and the spherical surface in the sleeve hole.

[0026] The above-described implementation modes are only used to illustrate the technical solution of the utility model, and are not limiting conditions for the implementation of the utility model. Therefore, any other modifications or equivalent replacements of configuration dimensions and internal structures made to the technical solution of the utility model, as long as they do not depart from the spirit and scope of the technical solution of the utility model, should be included in the scope of the claims of the utility model.

Claims

1. A movable anti-pulling plate type rubber bearing, comprising an upper bearing plate, a lower bearing plate and a bearing body disposed therebetween, characterized in that: The top plate of the support body is connected to the upper support plate through spherical rotation. A pull rod is arranged at the center of the sphere. At least one end of the pull rod is connected to the top plate or the upper support plate through an axial rotation mechanism.

2. The movable anti-pulling plate type rubber bearing according to claim 1 is characterized in that: The surface of the top plate is arranged as a spherical crown surface, the bottom surface of the upper support plate is provided with a spherical groove matching the spherical crown surface, the axial rotation mechanism includes a stepped through hole arranged in the center of the spherical groove, a threaded hole is arranged in the center of the top plate, the pull rod is a bolt passing through the through hole, the lower end screw is connected to the threaded hole, and the upper end nut is placed on the step of the through hole.

3. The movable anti-pulling plate type rubber bearing according to claim 1 is characterized in that: The axial rotation mechanism includes sleeve holes respectively arranged on the upper support plate and the top plate, the positions of the sleeve holes correspond to each other, the upper and lower ends of the pull rod respectively pass through the sleeve holes and a sphere with a cross-section larger than the sleeve hole is arranged at its end, and the sphere is in spherical sliding contact with the sleeve holes of the upper support plate and the top plate through a spherical surface.

4. The movable anti-pulling plate type rubber bearing according to claim 1 is characterized in that: The support body comprises a rubber base and a stiffening steel plate, wherein the stiffening steel plates are stacked and spaced apart inside the rubber base, and the upper part of the rubber base and the top plate, and the lower part of the rubber base and the lower support plate are bonded together by thermal vulcanization.

5. The movable anti-pulling plate type rubber bearing according to claim 1 is characterized in that: A friction pair adapted to the spherical curvature is arranged at the spherical rotation connection between the top plate and the upper support plate, and the friction pair is composed of a stainless steel slide plate and a modified polytetrafluoroethylene wear-resistant plate.

Images