Torsion bar elastic constraint spherical steel support

Abstract

The invention discloses a torsion bar elastic constraint spherical steel support which comprises a longitudinal spherical steel support, the longitudinal spherical steel support comprises a fixed support bottom plate located at the bottom, a support bottom basin is arranged on the support bottom plate in a sliding mode, a torsion bar assembly for constraint and limitation is arranged on the support bottom plate, and the longitudinal spherical steel support comprises a longitudinal spherical steel support body. The torsion bar assemblies are arranged on the two opposite side faces of the support bottom basin. Horizontal movement of the pin shaft end of the torsion arm is restrained through the side plate slide way, rigid rotation of the torsion arm during movement of the support is achieved, and the torsion arm rotates to drive the torsion rod spring to twist; a connecting rod assembly is removed, so that the structure is more compact; and the direction of the external force is parallel to the axis of the fixing bolt, the bolt stress is optimized, and the bridge support is more suitable for the application scene of the bridge support.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a torsion bar elastically constrained spherical steel bearing. Background Art

[0002] With the rise of the transportation industry, my country's long-span bridges have developed rapidly. Long-span bridges have long beams and heavy loads. Under the influence of temperature and load, the expansion and contraction displacement of the beam ends increases, and the maximum can even reach 2.6m (Sutong Yangtze River Bridge).

[0003] At present, in the structure of long-span continuous beam bridges, each bridge adopts a fixed + movable bearing system. If the fixed bearing is located at the midpoint of each bridge, the expansion displacement of the beam end can be symmetrical about the center position and will not be concentrated on one end. However, in most cases, the fixed bearing is not located at the center. At this time, the expansion displacement of the beam body is concentrated on the side beam end of the movable bearing, resulting in a further increase in the expansion displacement of the long-span bridge. The huge expansion displacement affects the stress and stability of the seamless line on the railway bridge, affects the driving comfort on the highway bridge, and increases the impact load of the bridge.

[0004] The Chinese patents "A Longitudinal Elastic Constraint Multifunctional Seismic Isolation Bearing" (application number 202111111450.4) and "A Bridge Bearing" (application number 202110379490.0) both provide a seismic isolation bearing with longitudinal adjustable limit and longitudinal elastic constraint. The method of setting elastic constraints between the pier and the beam body makes the zero position of the beam expansion and contraction be in the center of the beam body, avoiding the concentration of expansion and contraction displacement on one side of the beam body. At present, elastically constrained bearings all use disc spring groups to provide elastic constraints. In order to provide the required stiffness and elastic constraints, the disc spring group often overlaps dozens of pieces in both directions. Affected by the friction between the pieces, the stiffness stability of the disc spring group is very poor, resulting in low symmetry of temperature displacement at both ends of the bridge. Therefore, it is very necessary to propose a high-precision stiffness elastically constrained spherical steel bearing.

[0005] The Chinese patent "Linear spring device and design method for torsional load" (application number: 202410343442.X) provides a spring device with horizontal translation constraint, which uses a crank slider mechanism to convert the torsional load of the torsion bar into a linear load. However, the torsion bar system of this invention is affected by the movement space between the torsion arm and the connecting rod, has a small displacement range, and is limited in application scenarios. Summary of the invention

[0006] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a torsion bar elastically constrained spherical steel support.

[0007] The technical solution of the present invention is: a torsion bar elastically constrained spherical steel bearing, including a longitudinal spherical steel bearing, the longitudinal spherical steel bearing includes a bearing base plate fixed at the bottom, a bearing base basin is slidably arranged on the bearing base plate, and a torsion bar assembly for constraining and limiting is arranged on the bearing base plate.

[0008] Furthermore, the torsion bar assembly is arranged at two opposite sides of the support base.

[0009] Furthermore, the torsion bar assembly includes a fixing seat, a through hole is formed in the fixing seat, and a fixing bolt passes through the through hole to fix the fixing seat to the support base.

[0010] Furthermore, a guide structure is provided between the support bottom basin and the support bottom plate.

[0011] Furthermore, a side plate is formed on the support bottom plate, and a groove is formed between the two side plates.

[0012] Furthermore, the torsion bar assembly includes a side plate slider, and the side plate slider is arranged in the groove.

[0013] Furthermore, the side plate slider is movably connected to the torsion arm through a pin, and the torsion arm is between the two side plates.

[0014] Furthermore, an assembling hole is formed in the fixing seat, a torsion shaft is arranged in the assembling hole, and the torsion shaft is clearance-fitted in the assembling hole.

[0015] Furthermore, both ends of the torsion shaft protrude from the fixing seat, and the protruding sections are fixedly connected to the torsion arm.

[0016] The beneficial effects of the present invention are as follows: The present invention constrains the horizontal movement of the torsion arm pin shaft end through the side plate slide, so that the torsion arm can realize rigid body rotation when the support moves, and the rotation of the torsion arm drives the torsion bar spring to twist; the connecting rod assembly is removed to make the structure more compact; and the direction of the external force is made parallel to the axis of the fixing bolt, thereby optimizing the bolt force. The present invention is more suitable for bridge support application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a stereogram of the present invention; Figure 2 It is a structural schematic diagram of the torsion bar assembly in the present invention; Figure 3 It is a structural schematic diagram of the longitudinal spherical rigid bearing in the present invention; Figure 4 is a median schematic diagram of the present invention; Figure 5 It is a motion schematic diagram of the torsion arm in the present invention; in: 1Longitudinal spherical steel bearing 2Torsion bar assembly 11 Support base 12 Bottom plate slide 13 Side plate slide 14 Side plate 15 Support upper plate 16 Spherical wear plate 17 Ball crown lining 18 Upper plane wear plate 19 Lower plane wear plate 110 support base plate 21 Torsion shaft 22 Fixed seat 23 Torsion arm 24 Side plate slider 25 Pin 26 Fixing bolt. DETAILED DESCRIPTION

[0018] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 5 As shown, a torsion bar elastically constrained spherical steel bearing includes a longitudinal spherical steel bearing 1, wherein the longitudinal spherical steel bearing 1 includes a bearing base plate 110 fixed at the bottom, a bearing base basin 11 is slidably arranged on the bearing base plate 110, and a torsion bar assembly 2 for constraining and limiting is arranged on the bearing base plate 110.

[0019] The torsion bar assembly 2 is arranged at two opposite sides of the support bottom basin 11 .

[0020] The torsion bar assembly 2 includes a fixing seat 22 , a through hole is formed in the fixing seat 22 , and a fixing bolt 26 passes through the through hole to fix the fixing seat 22 to the support base 11 .

[0021] A guide structure is also provided between the support bottom basin 11 and the support bottom plate 110 .

[0022] The support bottom plate 110 is formed with side plates 14 , and a groove is formed between two side plates 14 .

[0023] The torsion bar assembly 2 comprises a side plate slider 24, and the side plate slider 24 is arranged in the groove.

[0024] The side plate slider 24 is movably connected to the torsion arm 23 via a pin 25 , and the torsion arm 23 is between the two side plates 14 .

[0025] An assembling hole is formed in the fixing seat 22 , and a torsion shaft 21 is disposed in the assembling hole, and the torsion shaft 21 is clearance-fitted in the assembling hole.

[0026] Both ends of the torsion shaft 21 protrude from the fixing seat 22 , and the protruding sections are fixedly connected to the torsion arm 23 .

[0027] Specifically, Figure 1As shown, a torsion bar elastically constrained spherical steel bearing mainly includes a longitudinal spherical steel bearing 1 and a torsion bar assembly 2. The longitudinal spherical steel bearing 1 realizes the function of a bridge bearing, and the torsion bar assembly 2 constrains the longitudinal spherical steel bearing 1.

[0028] Specifically, Figure 2 As shown, the torsion bar assembly 2 includes a torsion shaft 21, a fixing seat 22, a torsion arm 23, a side plate slider 24, a pin 25, and a fixing bolt 26. The fixing seat 22 includes two fixing plates, through holes are formed in the two fixing plates, and the fixing bolt 26 can pass through the through holes. The two fixing plates are assembled to form an assembly hole, and the torsion shaft 21 passes through the assembly hole.

[0029] More specifically, the protruding section of the torsion shaft 21 is fixedly connected to the torsion arm 23 , and a mounting hole corresponding to the torsion shaft 21 is formed in the torsion arm 23 .

[0030] More specifically, the side plate slider 24 is rectangular.

[0031] Specifically, Figure 3 As shown, the guide structure is a double guide structure, including a side plate slide 13 between the side plates 14. At the same time, the middle part of the support bottom plate 110 protrudes upward to form a step, and the support bottom plate 110 and the protrusion and the side plates 14 form a bottom plate slide 12, so that the support bottom basin 11 can move on the support bottom plate 110.

[0032] Specifically, Figure 4 As shown, a lower plane wear-resistant plate 19 is arranged between the support base basin 11 and the support base plate 110, a spherical crown lining plate 17 is arranged on the top of the support base basin 11, an upper plane wear-resistant plate 18 is arranged between the support base basin 11 and the spherical crown lining plate 17, a support upper plate 15 is arranged on the upper arc surface of the spherical crown lining plate 17, a spherical wear-resistant plate 16 is arranged between the spherical crown lining plate 17 and the support upper plate 15, and at the same time, the support upper plate 15 is inserted into the base basin of the support base basin 11.

[0033] Specifically, during the movement of the support bottom basin 11, the torsion shaft 21 is driven to move horizontally. One end of the torsion arm 23 is fixedly connected to the torsion shaft 21, and the other end slides on the side plate 14 through the pin shaft 25 slider. The side plate 14 limits the movement of the side plate slider 24, so that during the movement of the support upper plate 15, the torsion arm 23 is driven to rotate. The rotation of the torsion arm 23 drives the torsion shaft 21 to twist, thereby converting the torsional elastic constraint of the torsion shaft 21 into a horizontal elastic constraint.

[0034] Specifically, the torsion shaft 21 is fixedly connected to the torsion arm 23, and the two do not rotate or move relative to each other. The entire assembly is installed on the support base 11 by fixing bolts 26. There is a clearance fit between the fixing base and the torsion shaft 21, and the torsion shaft 21 can rotate freely in the inner hole of the fixing base. The torsion arm 23 is connected to the slider through a pin 26, and the hole-shaft fit of the pin is a clearance fit to release the rotation. The torsion arms on both sides of the torsion bar assembly face opposite directions, so that when the pin holes of the torsion arms on both sides move in the same direction, they turn in opposite directions, driving the torsion bar spring to twist.

[0035] The working process of the present invention is as follows: When the beam body does not undergo temperature displacement, the support is in the middle position and the torsion bar assembly does not output elastic constraint force to the outside.

[0036] When the beam undergoes temperature displacement, the torsion bar assembly 2 fixed to the support base basin moves in the longitudinal direction with the support base basin 11, but the side plate slider of the torsion bar assembly 2 is constrained by the side plate slide and does not move in the longitudinal direction. In this case, the torsion arm rotates. Since the torsion arms 23 on both sides of the torsion bar assembly 2 have different directions, the torsion arms 23 on both sides rotate in opposite directions, driving the torsion bar spring to twist, thereby achieving the output of elastic constraint force to the outside.

[0037] The present invention constrains the horizontal movement of the torsion arm pin shaft end through the side plate slide, so that the torsion arm can realize rigid body rotation when the support moves, and the rotation of the torsion arm drives the torsion bar spring to twist; the connecting rod assembly is removed to make the structure more compact; and the direction of the external force is made parallel to the axis of the fixing bolt, thereby optimizing the bolt force. The present invention is more suitable for bridge support application scenarios.

Claims

1. A torsion bar elastically constrained spherical steel bearing, comprising a longitudinal spherical steel bearing (1), characterized in that: The longitudinal spherical steel bearing (1) comprises a bearing base plate (110) fixed at the bottom, a bearing bottom basin (11) being slidably arranged on the bearing base plate (110), and a torsion bar assembly (2) for restraint and limitation being arranged on the bearing base plate (110).

2. The torsion bar elastically constrained spherical steel support according to claim 1, characterized in that: The torsion bar assembly (2) is arranged on two opposite sides of the support base basin (11).

3. The torsion bar elastically constrained spherical steel support according to claim 1, characterized in that: The torsion bar assembly (2) comprises a fixing seat (22), a through hole being formed in the fixing seat (22), and a fixing bolt (26) passing through the through hole to fix the fixing seat (22) to the support base (11).

4. The torsion bar elastically constrained spherical steel support according to claim 3, characterized in that: A guide structure is also provided between the support base basin (11) and the support base plate (110).

5. The torsion bar elastically constrained spherical steel support according to claim 3, characterized in that: A side plate (14) is formed on the support base plate (110), and a groove is formed between the two side plates (14).

6. The torsion bar elastically constrained spherical steel support according to claim 5, characterized in that: The torsion bar assembly (2) comprises a side plate slider (24), wherein the side plate slider (24) is arranged in a groove.

7. The torsion bar elastically constrained spherical steel support according to claim 6, characterized in that: The side plate slider (24) is movably connected to the torsion arm (23) via a pin shaft (25), and the torsion arm (23) is between the two side plates (14).

8. The torsion bar elastically constrained spherical steel support according to claim 7, characterized in that: An assembly hole is formed in the fixing seat (22), a torsion shaft (21) is arranged in the assembly hole, and the torsion shaft (21) is clearance-fitted in the assembly hole.

9. The torsion bar elastically constrained spherical steel support according to claim 8, characterized in that: Both ends of the torsion shaft (21) protrude from the fixing seat (22), and the protruding sections are fixedly connected to the torsion arm (23).

Images