Horseshoe-shaped shearing force locking device

Abstract

The utility model discloses a horseshoe-shaped shearing force locking device which comprises a base plate arranged on a rail transit box girder, a plurality of sets of ear walls arranged between the base plate and the rail transit box girder, a plurality of sets of anchoring plates arranged above the ear walls, and pins arranged above the anchoring plates. The pin is in a horseshoe shape, so that the base plate is fixed to a rail transit box girder through the pin. Through the geometric self-locking effect of the horseshoe-shaped pin, when the device is displaced under the action of external force, concrete wraps the U-shaped arc section of the pin to form a hook-shaped anchoring structure, and the pulling resistance is enhanced. Particularly, under dynamic working conditions such as earthquakes, the device can effectively resist pulling force, and the stability of the structure is guaranteed.

Description

Technical Field

[0001] This utility model relates to a horseshoe-shaped shear lock. Background Technology

[0002] Currently, the stability of rail transit box girders under earthquakes or other external forces mainly relies on traditional earthquake-resistant and anti-fall-off girder devices.

[0003] Existing seismic devices generally adopt designs such as integral concrete blocks, sliding concrete blocks, and rubber buffer blocks. The connection device between the anti-fall beam and the main beam is usually a straight nail or a traditional shear nail structure.

[0004] Traditional shear stud structures struggle to provide sufficient shear capacity under intense vibrations such as earthquakes, making them prone to stud failure or detachment, leading to beam instability. Furthermore, the stress concentration inherent in traditional shear stud designs often results in material cracking or failure, leading to a shorter service life and failing to meet the requirements for long-term stable operation. Traditional shear stud structures also require precise positioning during construction; errors in construction can easily lead to adverse consequences, increasing construction difficulty and time.

[0005] Therefore, a horseshoe-shaped shear lock is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a horseshoe-shaped shear lock to solve the problem mentioned in the background art that traditional shear nails are difficult to provide sufficient shear bearing capacity and are prone to damage or detachment.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a horseshoe-shaped shear lock, including a base plate disposed on a rail transit box girder, multiple sets of ear walls disposed between the base plate and the rail transit box girder, multiple sets of anchor plates disposed above the ear walls, and a pin disposed above the anchor plates, wherein the pin is horseshoe-shaped, so that the base plate is fixed to the rail transit box girder by the pin.

[0008] Preferably, the lower perimeter of the anchor plate is provided with anchor nails, and the anchor nails are inserted into the rail transit box girder through the base plate, so that the anchor plate is fixed to the rail transit box girder by the anchor nails.

[0009] Preferably, sliding grooves are provided on both sides of the anchor plate so that the bent portions on both sides of the pin are connected to the anchor plate through the sliding grooves.

[0010] Preferably, the sliding groove is semi-circular, and the inner diameter of the sliding groove is larger than the outer diameter of the pin, so that the pin deflects / slides within the sliding groove.

[0011] Preferably, the anchor plate is positioned laterally on the ear wall so that the end face of the pin is perpendicular to the track on the rail transit box girder.

[0012] Preferably, the ear wall is located horizontally on the base plate, and the two sides of the ear wall are provided with inclined surfaces, and the angle of the inclined surfaces is 45°.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When external forces (such as earthquakes or vehicle loads) are applied to the box girder of a rail transit system, the curved surface of the horseshoe-shaped pins comes into contact with the concrete, generating a bidirectional restraint force and enhancing the stability of shear force transmission. Compared with traditional straight pins, the horseshoe-shaped pins and the ear walls set on both sides provide a stronger shear connection, avoiding stress concentration and thus improving shear bearing capacity.

[0015] Through the geometric self-locking effect of the horseshoe-shaped pins, when the device is displaced by external forces, the concrete wraps around the U-shaped arc of the pins to form a hook-shaped anchoring structure, enhancing pull-out resistance. Especially under dynamic conditions such as earthquakes, the device can effectively resist pull-out forces and ensure the stability of the structure.

[0016] The device is designed with a self-adjusting function. The sawtooth structure formed by the pins and multiple sets of ear walls can automatically adjust its width (±2mm expansion / contraction) under temperature changes and thermal expansion and contraction, adapting to structural deformation and maintaining a stable working state. At the same time, under seismic conditions, the U-shaped arc segment absorbs seismic energy through plastic hinges, improving seismic resistance and safety.

[0017] Meanwhile, the pin and anchor plate can "rotate or slide freely" within a certain angle through the sliding groove, allowing for a certain tilt angle (±15°) during installation. This allows for adjustment of the angle between the pin and anchor plate, reducing the precision requirements of construction and improving construction flexibility and fault tolerance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the anchor plate structure according to an embodiment of the present utility model.

[0022] In the diagram: 1. Base plate; 2. Ear wall; 3. Anchor plate; 31. Sliding groove; 4. Pin; 5. Anchor bolt. Detailed Implementation

[0023] To address the problem that traditional shear studs often fail to provide sufficient shear capacity and are prone to breakage or detachment, this invention provides a horseshoe-shaped shear lock. The technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] Please see Figure 1-4 This utility model provides a horseshoe-shaped shear lock, including a base plate 1 disposed on a rail transit box girder, multiple sets of ear walls 2 disposed between the base plate 1 and the rail transit box girder, multiple sets of anchor plates 3 disposed above the ear walls 2, and a pin 4 disposed above the anchor plates 3, wherein the pin 4 is horseshoe-shaped, so that the base plate 1 is fixed to the rail transit box girder by the pin 4.

[0025] Anchor pins 5 are provided around the lower perimeter of the anchor plate 3, and the anchor pins 5 are inserted into the rail transit box girder through the base plate 1, so that the anchor plate 3 is fixed to the rail transit box girder by the anchor pins 5. Sliding grooves 31 are provided on both sides of the anchor plate 3, so that the bent portions on both sides of the pin 4 are connected to the anchor plate 3 through the sliding grooves 31. The sliding grooves 31 are semi-circular, and the inner diameter of the sliding grooves 31 is larger than the outer diameter of the pin 4, so that the pin 4 can deflect / slide within the sliding grooves 31. The anchor plate 3 is positioned laterally on the ear wall 2, so that the end face of the pin 4 is perpendicular to the track on the rail transit box girder.

[0026] The ear wall 2 is located on the base plate 1 and is arranged horizontally. The ear wall 2 has inclined surfaces on both sides, and the angle of the inclined surfaces is 45°.

[0027] The working principle of the horseshoe-shaped shear locking device provided by this utility model is as follows: In use, concrete is poured onto the base plate 1.

[0028] When train operation or earthquakes generate horizontal shear forces, the shear force is transmitted along the rail transit box girder to the base plate 1. The pins 4 are embedded in the concrete at both ends, forming a self-locking structure through their horseshoe shape, and absorbing the shear force through their own shear deformation.

[0029] The multiple sets of ear walls 2 connected by pin 4 form a sawtooth interlocking surface. The anchor 5 is inserted into the rail transit box girder, giving it stronger mechanical interlocking force and anti-slip capability during shearing, thereby preventing the pin 4 from displacing or loosening during stress. The pin 4 bears part of the shear load and suppresses the tendency of the device to pull out in the tensile direction, providing additional structural stability under earthquake or vehicle load excitation.

[0030] The anchor plate 3 has sliding grooves 31 on both sides, allowing the connection structure to slide or rotate freely within a small range without shearing or falling off when temperature changes, component deformation, or installation angle deviations occur. The bent ends of the pins 4 are inserted into the sliding grooves 31, ensuring the structural integrity and shear force transfer efficiency between the device and the beam. The various parts work together to form an effective shear force transfer mechanism in the structure, improving the overall shear resistance and ensuring the stability and reliability of the device under shear force.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A horseshoe-shaped shear lock, characterized in that: The system includes a base plate (1) installed on a rail transit box girder, multiple sets of ear walls (2) are provided between the base plate (1) and the rail transit box girder, multiple sets of anchor plates (3) are provided above the ear walls (2), and pins (4) are provided above the anchor plates (3), with the pins (4) being horseshoe-shaped, so that the base plate (1) is fixed to the rail transit box girder by the pins (4).

2. The horseshoe-shaped shear lock according to claim 1, characterized in that: Anchor nails (5) are provided around the lower part of the anchor plate (3), and the anchor nails (5) are inserted into the rail transit box girder through the base plate (1) so that the anchor plate (3) is fixed on the rail transit box girder by the anchor nails (5).

3. A horseshoe-shaped shear lock according to claim 2, characterized in that: Sliding grooves (31) are provided on both sides of the anchor plate (3) so that the bent parts on both sides of the pin (4) are connected to the anchor plate (3) through the sliding grooves (31).

4. A horseshoe-shaped shear lock according to claim 3, characterized in that: The sliding groove (31) is semi-circular, and the inner diameter of the sliding groove (31) is larger than the outer diameter of the pin (4) so ​​that the pin (4) can deflect / slide in the sliding groove (31).

5. A horseshoe-shaped shear lock according to claim 4, characterized in that: The anchor plate (3) is positioned laterally on the ear wall (2) so that the end face of the pin (4) is perpendicular to the track on the rail transit box girder.

6. A horseshoe-shaped shear lock according to claim 5, characterized in that: The ear wall (2) is located on the base plate (1) and is arranged horizontally. The ear wall (2) has inclined surfaces on both sides, and the angle of the inclined surfaces is 45°.

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