Track beam anti-drawing support

Abstract

The utility model relates to an anti-drawing support of a track beam. Common highway bridge and railway bridge supports cannot meet the stress requirements of track beam supports in the aspects of lateral horizontal force resistance and drawing force resistance. The support comprises an upper support plate, a spherical crown, a tensile shaft, a ball seat and a lower support plate from top to bottom, the bottom surface of the spherical crown is a convex spherical surface, and a vertical threaded hole is formed in the center of the bottom surface of the spherical crown; the top surface of the ball seat is a concave spherical surface, and a vertically-through stepped hole with a small upper part and a large lower part is formed in the position, corresponding to the threaded hole, of the ball seat; the lower portion of the tensile shaft is a big-end-down cap, the upper portion of the tensile shaft is a screw, the cap is located in the stepped hole, and the screw is located in the threaded hole. The anti-drawing function of the support is achieved through the anti-drawing shaft assembly in the support. When bearing vertical dead load brought by the track beam and an upper structure, the device can also provide vertical anti-drawing force for the track beam so as to resist lateral force and vertical drawing force borne by the track beam, and safe operation of the track beam is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge track construction, and particularly relates to a track beam anti-pullout bearing. Background Art

[0002] The track beam is the main structure for supporting the track and the running components such as the vehicles on the track beam. The track beam has a narrow beam body and a small distance between the bottom plates. During the operation of the track vehicle, the variable force generated by the swaying due to its own motion state, the centrifugal force generated by passing through the curved part of the track, the lateral force generated by the external wind force, and the load on the upper part of the track beam are all transmitted to the track beam through the track beam bearing. Therefore, the track beam bearing plays a very important role.

[0003] Compared with ordinary highway bridge and railway bridge bearings, the stress situation of the track beam bearing is more complex, and the performance requirements in aspects such as shock absorption (vibration reduction), impact resistance, and fatigue resistance are more stringent. Ordinary highway bridge and railway bridge bearings cannot meet the stress requirements of the track beam bearing in terms of resisting lateral horizontal force and anti-pullout force.

[0004] Therefore, it is necessary to design a new structure of the track beam bearing to overcome the above defects. Summary of the Invention

[0005] The purpose of the utility model is to provide a track beam anti-pullout bearing to solve the problems of the track beam bearing in terms of resisting lateral horizontal force and anti-pullout force.

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

[0007] A track beam anti-pullout bearing, the bearing includes an upper bearing plate, a spherical crown, an anti-pull shaft, a spherical seat and a lower bearing plate from top to bottom;

[0008] The bottom surface of the spherical crown is a convex spherical surface, and a vertical threaded hole is arranged at the center of the bottom surface of the spherical crown;

[0009] The top surface of the spherical seat is a concave spherical surface, and a stepped hole that is small at the top and large at the bottom and vertically penetrates is arranged at the position of the spherical seat corresponding to the threaded hole;

[0010] The lower part of the anti-pull shaft is a cap that is small at the top and large at the bottom, and the upper part is a screw rod. The cap is located in the stepped hole, and the screw rod is located in the threaded hole.

[0011] Further, L-shaped upper limit anti-pull plates are arranged on both sides of the upper bearing plate in the longitudinal bridge direction, upper clamping grooves are arranged on both sides of the spherical crown in the longitudinal bridge direction, and the upper limit anti-pull plates are clamped into the upper clamping grooves and can slide transversely in the bridge direction.

[0012] Further, L-shaped lower limit tensile plates are arranged on both transverse bridge sides of the lower bearing plate, lower clamping grooves are arranged on both transverse bridge sides of the spherical seat, and the lower limit tensile plates are clamped into the lower clamping grooves and can slide longitudinally along the bridge.

[0013] Further, an upper plane sliding plate is arranged between the bottom of the upper bearing plate and the top of the spherical crown and is located in the plane groove arranged at the top of the spherical crown.

[0014] Further, a lower plane sliding plate is arranged between the bottom of the spherical seat and the top of the lower bearing plate and is located in the plane groove arranged at the bottom of the spherical seat.

[0015] Further, a spherical sliding plate is arranged between the bottom of the spherical crown and the top of the spherical seat and is located in the spherical groove arranged at the top of the spherical seat.

[0016] Further, the upper surface of the cap of the tensile shaft is a concave spherical surface and is provided with a friction pair, and the stepped lower surface of the stepped hole of the spherical seat is a convex spherical surface and is pressed on the friction pair.

[0017] Further, there is a gap between the outer periphery of the cap of the tensile shaft and the inner wall of the stepped hole of the spherical seat.

[0018] Further, stainless steel plates are arranged on the lower surface of the upper bearing plate, the lower surface of the spherical crown, and the upper surface of the lower bearing plate.

[0019] Further, upper anchor fittings are arranged at the edge of the upper bearing plate, and lower anchor fittings are arranged at the edge of the lower bearing plate.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The present utility model provides a tensile and anti-pulling bearing for a track beam, and realizes the tensile and anti-pulling function of the bearing through the tensile shaft assembly inside the bearing. When bearing the vertical dead load brought by the track beam and the upper structure, it can also provide a vertical tensile and anti-pulling force for the track beam to resist the lateral force and vertical tensile and anti-pulling force received by the track beam, and ensure the safe operation of the track beam. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is a longitudinal bridge structural schematic diagram of an embodiment of the present utility model.

[0024] Figure 2 It is a schematic transverse bridge structure diagram of an embodiment of the present utility model.

[0025] Figure 3 It is a schematic longitudinal bridge top view structure diagram of an embodiment of the present utility model.

[0026] The markings in the figure are:

[0027] 1 - upper bearing plate, 2 - upper plane slide plate, 3 - spherical crown, 4 - spherical surface slide plate, 5 - spherical seat, 6 - tensile axis, 7 - lower plane slide plate, 8 - lower bearing plate, 9 - lower anchor fitting, 10 - upper anchor fitting. Specific embodiments

[0028] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "central", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "longitudinal", "transverse", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connection", "installation", etc. should be understood in a broad sense. For example, it can be fixedly connected and installed, or detachably connected and installed, or integrally connected and installed. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] The present utility model provides a tensile and anti - pull bearing for a track beam, which provides vertical supporting force during the operation of the track beam, releases displacements and rotations caused by temperature creep or loads of the track beam, and provides tensile and anti - pull force when the track beam receives a lifting force to ensure the safe operation of the track beam.

[0032] Embodiment 1:

[0033] As Figures 1-3 , the bearing of this embodiment includes, from top to bottom, an upper bearing plate 1, a spherical crown 3, a tensile axis 6, a spherical seat 5, and a lower bearing plate 8.

[0034] The bottom surface of the spherical crown 3 is a convex spherical surface, and a vertical threaded hole is provided at the center of the bottom surface of the spherical crown 3. The top surface of the spherical seat 5 is a concave spherical surface, and a stepped hole that is smaller at the top and larger at the bottom and vertically penetrates is provided at the position of the spherical seat 5 corresponding to the threaded hole. Specifically, it is a stepped counterbore, and the transition part is a spherical surface and is chrome-plated. The lower part of the tensile shaft 6 is a cap that is smaller at the top and larger at the bottom, and the upper part is a screw rod. The cap is located in the stepped hole, and the screw rod is located in the threaded hole. The screw rod passes through the stepped counterbore of the spherical seat 5 and is screwed into the threaded hole at the center of the lower spherical surface of the spherical crown 3 and mechanical anti-loosening treatment is carried out.

[0035] On both sides of the upper support plate 1 in the longitudinal bridge direction, L-shaped upper limit tensile plates are provided. On both sides of the spherical crown 3 in the longitudinal bridge direction, upper clamping grooves are provided. The upper limit tensile plates are clamped into the upper clamping grooves and can slide transversely, guiding and limiting the spherical crown 3 and providing a downward pulling force. A friction pair is provided at the contact with the spherical crown 3 to achieve sliding performance. On both sides of the lower support plate 8 in the transverse bridge direction, L-shaped lower limit tensile plates are provided. On both sides of the spherical seat 5 in the transverse bridge direction, lower clamping grooves are provided. The lower limit tensile plates are clamped into the lower clamping grooves and can slide longitudinally, guiding and limiting the spherical seat 5 and providing a downward pulling force. A friction pair is provided at the contact with the spherical seat 5 to achieve sliding performance.

[0036] An upper planar slide plate 2 is provided between the bottom of the upper support plate 1 and the top of the spherical crown 3. It is circular ring-shaped and is located in the planar groove provided at the top of the spherical crown 3. A lower planar slide plate 7 is provided between the bottom of the spherical seat 5 and the top of the lower support plate 8. It is circular ring-shaped and is located in the planar groove provided at the bottom of the spherical seat 5. A spherical slide plate 4 is provided between the bottom of the spherical crown 3 and the top of the spherical seat 5. It is a circular spherical surface and is located in the spherical groove provided at the top of the spherical seat 5. The upper surface of the cap of the tensile shaft 6 is a concave spherical surface and a friction pair is provided. The stepped lower surface of the stepped hole of the spherical seat 5 is a convex spherical surface and presses on the friction pair. The spherical surface at the transition of the stepped counterbore from bottom to top at the central axis of the spherical seat 5 and the spherical surface of the upper surface of the circular cap of the tensile shaft 6 have matching curvature radii. The slide plates and the friction pairs are made of high-performance non-metallic slide plate materials and can be cut into the required sizes according to the design.

[0037] The tensile shaft 6 can be made of alloy structural steel, quenched and tempered, and the surface is chrome-plated. The spherical seat 3 and the spherical crown 8 are connected into a whole through the tensile shaft 6. There is a gap between the outer periphery of the cap of the tensile shaft 6 and the inner wall of the stepped hole of the spherical seat 5 to realize the rotation of the tensile shaft 6 and the spherical crown 3 relative to the spherical seat 5.

[0038] The upper bearing plate 1, spherical crown 3, ball seat 5, and lower bearing plate 8 are all processed from high-strength steel plate materials. In cold environments and corrosive environments, high-strength cold-resistant and corrosion-resistant steel plate materials are used for processing, and heat treatment or surface treatment is carried out according to application requirements. Stainless steel plates are provided on the lower surface of the upper bearing plate 1, the lower surface of the spherical crown 3, and the upper surface of the lower bearing plate 8. They have high corrosion resistance, smooth and flat surface quality, can reduce the friction coefficient, reduce the wear of the non-metallic sliding plate, and can maintain good stability and durability during the friction process. During long-term use, they can also maintain good surface quality and dimensional stability. The stainless steel plates can be attached by welding or mechanical connection (such as bolts, etc.). The circular spherical groove above the ball seat 5 and the spherical surface below the spherical crown 3 are attached with stainless steel plates with matching curvature radii.

[0039] The upper bearing plate 1 is cut from high-strength steel plate into the designed dimensions, and anchoring holes and upper anchor fittings 10 are set at the edges. The overall structure is simple and the processability is strong. Anti-corrosion coating is carried out according to the installation site to ensure good contact and positioning with the bottom of the track beam. In addition, the upper bearing plate 1 also has the function of increasing the contact area with the bottom of the track beam, dispersing the upper force, and reducing load concentration.

[0040] The lower bearing plate 8 is cut from high-strength steel plate into the designed dimensions, and anchoring holes and lower anchor fittings 9 are set at the edges. The overall structure is simple and the processability is strong. Anti-corrosion coating is carried out according to the installation site to ensure good contact and positioning with the pier cushion stone of the track beam. In addition, the lower bearing plate 8 also has the function of increasing the contact area with the pier cushion stone of the track beam, dispersing the upper force, and reducing load concentration.

[0041] The end of the anchor fitting is provided with an enlarged end to achieve the tensile function, and the distribution and arrangement can be carried out according to the situation of the pier cushion stone of the track beam and the embedded parts at the bottom of the track beam.

[0042] Embodiment 2:

[0043] In this embodiment, L-shaped upper limit tensile plates are provided on both sides of the upper bearing plate 1 in the transverse bridge direction, upper card slots are provided on both sides of the spherical crown 3 in the transverse bridge direction, and the upper limit tensile plates are snapped into the upper card slots and can slide longitudinally in the bridge direction. L-shaped lower limit tensile plates are provided on both sides of the lower bearing plate 8 in the longitudinal bridge direction, lower card slots are provided on both sides of the ball seat 5 in the longitudinal bridge direction, and the lower limit tensile plates are snapped into the lower card slots and can slide transversely in the bridge direction. Other structures are the same as those in Embodiment 1.

[0044] In other embodiments, according to the track beam support system, fixed-type and two-way-type track beam anti-pull-out bearings with the same vertical bearing capacity can be designed, and horizontal forces of more than 50% of the vertical bearing capacity and vertical pull-out forces close to 50% can be achieved.

[0045] The utility model realizes the anti-pulling function of the bearing through the tensile shaft assembly inside the bearing. When bearing the vertical dead load brought by the track beam and the upper structure, it can also provide a vertical anti-pulling force to the track beam to resist the lateral force and vertical pulling force received by the track beam, and is more suitable for the complex stress environment of the track beam.

[0046] The above uses specific examples to elaborate on the utility model, which is only used to help understand the utility model and is not intended to limit the utility model. For those skilled in the technical field to which the utility model belongs, according to the idea of the utility model, several simple deductions, deformations or substitutions can also be made.

Claims

1. A track beam anti-pulling support, characterized in that: The support comprises, from top to bottom, an upper support plate (1), a spherical crown (3), a tensile shaft (6), a ball seat (5) and a lower support plate (8); The bottom surface of the spherical crown (3) is a convex spherical surface, and a vertical threaded hole is arranged at the center of the bottom surface of the spherical crown (3); The top surface of the ball seat (5) is a concave spherical surface, and the ball seat (5) is provided with a stepped hole which is smaller at the top and larger at the bottom and vertically penetrates the ball seat (5) at a position corresponding to the threaded hole; The lower part of the tensile shaft (6) is a cap which is smaller at the top and larger at the bottom, and the upper part is a screw rod. The cap is located in the step hole, and the screw rod is located in the threaded hole.

2. The track beam anti-pulling support according to claim 1, characterized in that: The upper support plate (1) is provided with L-shaped upper limit tensile plates on both sides in the longitudinal direction of the bridge, and the spherical crown (3) is provided with upper clamping grooves on both sides in the longitudinal direction of the bridge. The upper limit tensile plates are clamped into the upper clamping grooves and can slide in the transverse direction of the bridge.

3. The track beam anti-pulling support according to claim 1, characterized in that: The lower support plate (8) is provided with L-shaped lower limit tensile plates on both sides of the transverse bridge, and the ball seat (5) is provided with lower clamping grooves on both sides of the transverse bridge. The lower limit tensile plates are clamped into the lower clamping grooves and can slide in the longitudinal direction of the bridge.

4. The track beam anti-pulling support according to claim 1, characterized in that: An upper plane slide plate (2) is provided between the bottom of the upper support plate (1) and the top of the spherical crown (3), and is located in a plane groove provided on the top of the spherical crown (3).

5. The track beam anti-pulling support according to claim 1, characterized in that: A lower plane slide plate (7) is provided between the bottom of the ball seat (5) and the top of the lower support plate (8), and is located in a plane groove provided at the bottom of the ball seat (5).

6. The track beam anti-pulling support according to claim 1, characterized in that: A spherical slide plate (4) is arranged between the bottom of the spherical cap (3) and the top of the ball seat (5), and is located in a spherical groove arranged on the top of the ball seat (5).

7. The track beam anti-pulling support according to claim 1, characterized in that: The upper surface of the cap of the tensile shaft (6) is a concave spherical surface and is provided with a friction pair, and the lower surface of the step hole of the ball seat (5) is a convex spherical surface and is pressed onto the friction pair.

8. The track beam anti-pulling support according to claim 1, characterized in that: There is a gap between the outer periphery of the cover cap of the tensile shaft (6) and the inner wall of the step hole of the ball seat (5).

9. The track beam anti-pulling support according to claim 1, characterized in that: The lower surface of the upper support plate (1), the lower surface of the spherical crown (3), and the upper surface of the lower support plate (8) are all provided with stainless steel plates.

10. The track beam anti-pulling support according to claim 1, characterized in that: An upper anchor (10) is provided at the edge of the upper support plate (1), and a lower anchor (9) is provided at the edge of the lower support plate (8).

Images