Torsion bar elastic restraint ball-type steel support

Abstract

The application discloses a torsion bar elastic constraint ball type steel support, which comprises a longitudinal ball type rigid support, the longitudinal ball type rigid support comprises a support bottom plate fixed at the bottom, a support bottom basin is slidably arranged on the support bottom plate, a torsion bar assembly for constraint and limitation is arranged on the support bottom plate, and the torsion bar assembly is arranged at two opposite sides of the support bottom basin. The horizontal movement of the torsion arm pin shaft end is constrained by the side plate slide, so that the torsion arm realizes rigid body rotation during support movement, and the torsion of the torsion bar spring is driven by the rotation of the torsion arm; the connecting rod assembly is removed, so that the structure is more compact; and the direction of external force is parallel to the axis of the fixing bolt, so that the stress of the bolt is optimized, and the application is more suitable for bridge support application scenarios.

Description

[0001] This application is a divisional application. The original application was filed on January 22, 2025, with application number 2025101000064, and the invention title was: A torsion bar elastic constraint spherical steel support. Technical Field

[0002] This invention belongs to the field of bridge engineering technology, and specifically relates to a torsion bar elastically constrained spherical steel bearing. Background Technology

[0003] 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, and the expansion and contraction displacement at the beam ends increases under the influence of temperature and load, reaching a maximum of 2.6m (Sutong Yangtze River Bridge).

[0004] Currently, in long-span continuous beam bridge structures, each span often employs a fixed + movable bearing system. If the fixed bearing is located at the midpoint of each span, the expansion and contraction displacement at the beam ends can be symmetrical about the center, avoiding concentration at one end. However, in most cases, the fixed bearing is not located at the center. In this case, the expansion and contraction displacement of the beam is concentrated at the beam end on the side of the movable bearing, leading to a further increase in the expansion and contraction displacement of long-span bridges. This enormous expansion and contraction displacement affects the stress and stability of seamless tracks on railway bridges, and on highway bridges, it affects driving comfort and increases the impact load on the bridge.

[0005] 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 longitudinally adjustable limiting and longitudinal elastic constraint. The method of setting elastic constraints between the pier and the beam ensures that the zero point of beam expansion and contraction is located at the center of the beam, preventing expansion and contraction displacement from concentrating on one side of the beam. Currently, elastic constraint bearings all use disc spring assemblies to provide elastic constraint force. To provide the required stiffness and elastic constraint force, dozens of disc springs are often stacked in opposite directions. Due to the friction between the springs, the stiffness stability of the disc spring assembly is very poor, resulting in low symmetry of temperature displacement at both ends of the bridge. Therefore, it is necessary to propose a high-precision stiffness elastic constraint spherical steel bearing.

[0006] Chinese patent “Linear Spring Device and Design Method for Torsional Load Bearing” (application number: 202410343442.X) provides a spring device with horizontal translational constraint. It 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 motion space between the torsion arm and the connecting rod, resulting in a small displacement range and limited application scenarios. Summary of the Invention

[0007] This 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.

[0008] The technical solution of the present invention is: a torsion bar elastic constraint spherical steel support, including a longitudinal spherical rigid support, wherein the longitudinal spherical rigid support includes a support base plate fixed at the bottom, a support base plate is slidably disposed on the support base plate, and a torsion bar assembly for constraint is disposed on the support base plate.

[0009] Furthermore, the torsion bar assembly is located on two opposite sides of the support base.

[0010] Furthermore, the torsion bar assembly includes a fixing seat with a through hole formed therein, through which a fixing bolt passes to fix the fixing seat to the base plate of the support.

[0011] Furthermore, a guide structure is provided between the support base basin and the support base plate.

[0012] Furthermore, side plates are formed on the base plate of the support, and grooves are formed between the two side plates.

[0013] Furthermore, the torsion bar assembly includes a side plate slider disposed in a groove.

[0014] Furthermore, the side plate slider is movably connected to the torsion arm via a pin, and the torsion arm is located between the two side plates.

[0015] Furthermore, an assembly hole is formed in the fixing seat, and a torsion shaft is provided in the assembly hole, with the torsion shaft in clearance fit within the assembly hole.

[0016] Furthermore, both ends of the torsion shaft protrude from the fixed base, and the protruding sections are fixedly connected to the torsion arm.

[0017] The beneficial effects of this invention are as follows: This invention constrains the horizontal movement of the torsion arm pin end by using a side plate slide rail, enabling the torsion arm to achieve rigid body rotation when the support moves. The rotation of the torsion arm drives the torsion bar spring to twist. The connecting rod assembly is eliminated, making the structure more compact. Furthermore, the direction of the external force is parallel to the axis of the fixing bolt, optimizing the bolt stress. This invention is more suitable for bridge support applications. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the torsion bar assembly in this invention; Figure 3 This is a schematic diagram of the longitudinal spherical rigid support in this invention; Figure 4 This is a schematic diagram of the middle position of the present invention; Figure 5This is a schematic diagram of the motion of the torsion arm in this invention; in: 1. Longitudinal spherical rigid support; 2. Torsion bar assembly 11 Support base basin 12 Base plate slide rail 13 Side panel slide 14 Side panel 15 Support plate 16 Spherical wear-resistant plate 17. Crown Liner Plate; 18. Upper Flat Wear-Resistant Plate 19 Lower surface wear-resistant plate 110 Support base plate 21 Torsion shaft 22 Fixing seat 23 Torsion arm 24 Side plate slider 25 Pin 26 Fixing Bolt. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 5 As shown, a torsion bar elastic constraint spherical steel support includes a longitudinal spherical rigid support 1, the longitudinal spherical rigid support 1 including a support base plate 110 fixed at the bottom, a support base basin 11 slidably disposed on the support base plate 110, and a torsion bar assembly 2 for constraint and restriction disposed on the support base plate 110.

[0020] The torsion bar assembly 2 is located on two opposite sides of the support base 11.

[0021] The torsion bar assembly 2 includes a fixed seat 22 with a through hole formed therein. A fixing bolt 26 passes through the through hole to fix the fixed seat 22 to the support base 11.

[0022] A guide structure is also provided between the support base 11 and the support base plate 110.

[0023] Side plates 14 are formed on the base plate 110 of the support, and grooves are formed between the two side plates 14.

[0024] The torsion bar assembly 2 includes a side plate slider 24, which is disposed in a groove.

[0025] The side plate slider 24 is movably connected to the torsion arm 23 via a pin 25, and the torsion arm 23 is located between the two side plates 14.

[0026] The mounting base 22 has an assembly hole, and a torsion shaft 21 is provided in the assembly hole, with the torsion shaft 21 in clearance fit within the assembly hole.

[0027] Both ends of the torsion shaft 21 protrude from the fixed base 22, and the protruding sections are fixedly connected to the torsion arm 23.

[0028] Specifically, such as Figure 1 As shown, a torsion bar elastically constrained spherical steel bearing mainly includes a longitudinal spherical rigid bearing 1 and a torsion bar assembly 2. The longitudinal spherical rigid bearing 1 realizes the function of a bridge bearing, and the torsion bar assembly 2 constrains the longitudinal spherical rigid bearing 1.

[0029] Specifically, such as Figure 2 As shown, the torsion bar assembly 2 includes a torsion shaft 21, a fixed base 22, a torsion arm 23, a side plate slider 24, a pin 25, and a fixing bolt 26. The fixed base 22 includes two fixed plates, with through holes formed in the two fixed plates. The fixing bolt 26 can pass through the through holes. The two fixed plates are joined together to form an assembly hole, through which the torsion shaft 21 passes.

[0030] 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.

[0031] More specifically, the side plate slider 24 is rectangular.

[0032] Specifically, such as Figure 3 As shown, the guide structure is a double guide structure, including the side plate slide 13 between the side plates 14. At the same time, the middle of the support base plate 110 protrudes upward to form a step. The support base plate 110, the protrusion, and the side plates 14 enclose each other to form the base plate slide 12, so that the support base plate 11 can move on the support base plate 110.

[0033] Specifically, such as Figure 4 As shown, a lower flat wear-resistant plate 19 is provided between the support base basin 11 and the support base plate 110. A spherical crown liner 17 is provided on the top of the support base basin 11. An upper flat wear-resistant plate 18 is provided between the support base basin 11 and the spherical crown liner 17. A support upper plate 15 is provided at the upper arc surface of the spherical crown liner 17. A spherical wear-resistant plate 16 is provided between the spherical crown liner 17 and the support upper plate 15. At the same time, the support upper plate 15 is inserted into the base basin of the support base basin 11.

[0034] Specifically, during the movement of the support base 11, the torsion shaft 21 moves 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 via the pin 25 slider. The side plate 14 restricts the movement of the side plate slider 24. Thus, during the movement of the support upper plate 15, the torsion arm 23 rotates. 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.

[0035] Specifically, the torsion shaft 21 and the torsion arm 23 are fixedly connected, and there is no relative rotation or movement between them. The entire assembly is mounted to the base plate 11 of the support by fixing bolts 26. The fixing seat and the torsion shaft 21 are clearance-fitted, allowing the torsion shaft 21 to rotate freely in the inner hole of the fixing seat. The torsion arm 23 is connected to the slider by a pin 26. All holes of the pin are clearance-fitted to release rotation. The torsion arms on both sides of the torsion bar assembly face opposite directions, so that when the pin holes of the two torsion arms move in the same direction, they turn in opposite directions, causing the torsion bar spring to twist.

[0036] The working process of this invention is as follows: When the beam does not experience temperature displacement, the support is in the neutral position, and the torsion bar assembly does not output elastic constraint force.

[0037] When the beam undergoes temperature displacement, the torsion bar assembly 2 fixed to the support base moves longitudinally along with the support base 11. However, the side plate slider of the torsion bar assembly 2 is constrained by the side plate slide rail and does not move longitudinally. In this case, the torsion arm rotates. Since the torsion arms 23 on both sides of the torsion bar assembly 2 are oriented differently, the two torsion arms 23 rotate in opposite directions, causing the torsion bar spring to twist, thus realizing the external output of elastic constraint force.

[0038] This invention constrains the horizontal movement of the torsion arm pin end by using a side plate slide rail, enabling the torsion arm to achieve rigid body rotation when the support moves. The rotation of the torsion arm drives the torsion bar spring to twist. The connecting rod assembly is eliminated, making the structure more compact. Furthermore, the direction of the external force is parallel to the axis of the fixing bolt, optimizing the bolt stress. This invention is more suitable for bridge support applications.

Claims

1. A torsion bar elastically constrained spherical steel support, comprising a longitudinal spherical rigid support (1), characterized in that: The longitudinal spherical rigid support (1) includes a support base plate (110) fixed at the bottom, a support base plate (11) is slidably disposed on the support base plate (110), and a torsion bar assembly (2) for constraint is disposed on the support base plate (110). The torsion bar assembly (2) includes a fixed seat (22), which includes two fixed plates. Through holes are formed in the two fixed plates, and an assembly hole is formed between the two fixed plates. The torsion shaft (21) passes through the assembly hole. A through hole is formed in the fixed seat (22), and a fixing bolt (26) passes through the through hole to fix the fixed seat (22) to the support base (11). The torsion bar assembly (2) includes a side plate slider (24) disposed in a groove; The side plate slider (24) is movably connected to the torsion arm (23) via a pin (25), and the torsion arm (23) is located between the two side plates (14).

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

3. The torsion bar elastically constrained spherical steel support according to claim 1, characterized in that: A guide structure is also provided between the support base plate (11) and the support base plate (110).

4. The torsion bar elastically constrained spherical steel support according to claim 3, characterized in that: Side plates (14) are formed on the base plate (110) of the support, and grooves are formed between the two side plates (14).

5. The torsion bar elastically constrained spherical steel support according to claim 1, characterized in that: The mounting base (22) forms an assembly hole, and a torsion shaft (21) is provided in the assembly hole, with the torsion shaft (21) in clearance fit within the assembly hole.

6. A torsion bar elastically constrained spherical steel support according to claim 5, characterized in that: Both ends of the torsion shaft (21) protrude from the fixed seat (22), and the protruding sections are fixedly connected to the torsion arm (23).

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