A lifting clamp suitable for lifting a rail

Abstract

The utility model belongs to the fixture technical field of ballastless track, concretely relates to a kind of lifting fixture suitable for steel rail hoisting, including square frame, one hook claw assembly is respectively arranged at the four corners of square frame;Hook claw assembly includes first hook claw, second hook claw, first connecting rod, second connecting rod, connecting shaft;The first hook claw and second hook claw are mutually crossed and are mutually rotatably connected, the both ends of first connecting rod are rotatably connected with connecting shaft and the upper end of first hook claw respectively, the both ends of second connecting rod are rotatably connected with connecting shaft and the upper end of second hook claw respectively;The connecting shaft is fixedly connected with square frame.The hook claw assembly in the scheme adopts cross type linkage structure, in the process of steel rail hoisting, by the gravity of steel rail and its connecting pillow pier, the clamping force of lifting fixture is kept, can effectively prevent the drop in the process of steel rail hoisting, guarantee the security in the process of steel rail hoisting.

Description

Technical Field

[0001] This utility model belongs to the field of clamping technology for ballastless tracks, specifically relating to a lifting clamp suitable for hoisting steel rails. Background Technology

[0002] As high-speed rail speeds increase, the requirements for the precision of ballastless track laying also become more stringent. Current technologies often involve individually raising the height of each sleeper block (also called a sleeper pier) using shims, and then using pry bars to directly adjust the lateral position of the sleeper blocks. This method of adjusting the lateral and height positions of each sleeper block individually not only affects the speed of ballastless track laying but also easily leads to significant errors, thus impacting the upper limit of safe train speed. Furthermore, after cement is poured, the sleeper blocks are prone to positional shifts, further affecting the installation precision.

[0003] To address this issue, patent application CN202411366873.4 discloses a paving system for ballastless track installation, which can precisely adjust the installation position of sleeper blocks; it can also adjust the centerline position and height of a batch of sleeper blocks, thereby increasing the speed and efficiency of ballastless track paving.

[0004] In the application of the above technologies and in real-world scenarios, when laying ballastless tracks, it is often necessary to use lifting equipment to lift and transport the tracks. Therefore, it is necessary to design a lifting clamp that can be used for lifting and transporting rails. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this solution provides a lifting clamp suitable for rail hoisting.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A lifting clamp suitable for lifting rails includes a square frame, with a hook assembly at each of the four corners of the square frame;

[0008] The hook assembly includes a first hook, a second hook, a first connecting rod, a second connecting rod, and a connecting shaft; the first hook and the second hook are intersecting and rotatably connected to each other, the two ends of the first connecting rod are rotatably connected to the connecting shaft and the upper end of the first hook respectively, and the two ends of the second connecting rod are rotatably connected to the connecting shaft and the upper end of the second hook respectively; the connecting shaft is fixedly connected to the square frame.

[0009] As an alternative or supplement to the above structure: the first hook and the second hook are rotatably connected to each other via a cross shaft, the end of the cross shaft extending out of the first hook and the second hook; a positioning hook is rotatably connected to the connecting shaft, the positioning hook being used to hook the cross shaft.

[0010] As an alternative or supplement to the above structure: the hook opening of the positioning hook is inclined toward the direction of the connecting shaft, and when the hook claw assembly is in the open state, the connecting shaft and the cross shaft can move closer to each other, thereby driving the positioning hook to automatically disengage from the cross shaft.

[0011] As an alternative or supplement to the above structure: the hook opening of the positioning hook is a V-shaped opening, one side of the V-shaped opening is perpendicular to the length direction of the positioning hook, and the other side of the V-shaped opening is inclined to the length direction of the positioning hook.

[0012] As an alternative or supplement to the above structure: the first connecting rod and the first hook are rotatably connected via a first end shaft; the second connecting rod and the second hook are rotatably connected via a second end shaft.

[0013] As an alternative or supplement to the above structure: the first claw includes two claw bodies that are parallel to each other and have the same shape, and a reinforcing block is connected between the hook ends of the two claw bodies.

[0014] As an alternative or supplement to the above structure: a reinforcing block is fixedly provided on both sides of the hook end of the second hook; the reinforcing block on the first hook is directly opposite the second hook, and the reinforcing block on the second hook is directly opposite the claw body.

[0015] As an alternative or supplement to the above structure: hoisting fulcrums are provided at the four corners of the square frame, and the connecting shaft is connected to the hoisting fulcrums and used for connecting the hoisting equipment.

[0016] The beneficial effects of this utility model are as follows: The hook and claw assembly in this solution adopts a cross-linked structure. During the rail hoisting process, the weight of the rail and its connecting sleeper pier is used to maintain the clamping force of the lifting clamp, which can effectively prevent the rail from falling off during the rail hoisting process and ensure the safety of the rail hoisting process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a structural diagram of the lifting clamp in this scheme;

[0019] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0020] Figure 3This is a structural schematic diagram of the hook and claw assembly;

[0021] Figure 4 This is an exploded view of the hook and claw assembly;

[0022] Figure 5 This is a diagram showing the state of the hook and claw assembly when it is clamping the rail;

[0023] Figure 6 It is a structural diagram showing the connection between the rails, the fixing frame, and the sleepers.

[0024] In the diagram: 1-Square frame; 11-Lifting fulcrum; 2-Hook and claw assembly; 21-First connecting rod; 22-Second connecting rod; 23-Second end shaft; 24-First end shaft; 25-Cross shaft; 26-Positioning hook; 27-Second hook and claw; 28-First hook and claw; 29-Reinforcing block; 210-Connecting shaft; 3-Rail; 4-Fixing frame; 5-Sleeper. Detailed Implementation

[0025] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this solution without creative effort are within the protection scope of this solution.

[0026] Example

[0027] like Figures 1 to 6 As shown in the figure, this embodiment designs a lifting clamp suitable for hoisting rail 3, including a square frame 1 and a hook assembly 2.

[0028] The square frame 1 can be a frame structure welded from multiple square steel pipes. Lifting support points 11 are set at the four corners of the square frame 1. Hooks on lifting equipment such as overhead cranes and gantry cranes can be connected to the lifting support points 11, thereby facilitating the lifting of the lifting clamps and the clamped rails 3.

[0029] The hook assembly 2 is located at the corner of the square frame 1, with one hook assembly 2 at each of the four corners of the square frame 1. The hook assembly 2 includes components such as a first hook 28, a second hook 27, a first connecting rod 21, a second connecting rod 22, and a connecting shaft 210.

[0030] The connecting shaft 210 is a horizontal long rod structure. One end of the connecting shaft 210 is connected to the hoisting support point 11 of the square frame 1. During hoisting, the hook on the lifting device can be attached to the connecting shaft 210.

[0031] The arm segment of the first hook 28 intersects with the second hook 27, and a cross shaft 25 is provided at the intersection. The first hook 28 and the second hook 27 are rotatably connected to each other through the cross shaft 25. Specifically, the cross shaft 25 is fixedly connected to the first hook 28, and the second hook 27 is rotatably connected to the cross shaft 25. The hook ends of the first hook 28 and the second hook 27 are opposite each other to facilitate clamping the rail 3. The rail 3 includes a rail base, a rail web, and a rail head, with the rail head located above the rail base and the rail web located between the rail base and the rail head. The hook ends of the first hook 28 and the second hook 27 can hook into the grooves on opposite sides of the rail web, thereby clamping the rail 3.

[0032] The first hook 28 includes two parallel and identical claw bodies, with a reinforcing block 29 connecting the hook ends of the two claw bodies. A reinforcing block 29 is fixedly disposed on each side of the hook end of the second hook 27. The reinforcing blocks 29 on the first hook 28 are directly opposite to the second hook 27, and the reinforcing blocks 29 on the second hook 27 are directly opposite to the claw bodies. This allows the reinforcing blocks 29 to eliminate shear force when the first hook 28 and the second hook 27 are engaged to clamp the rail 3, reducing stress damage to the cross shaft 25 and improving clamping stability.

[0033] One end of the first connecting rod 21 is rotatably connected to the connecting shaft 210, and the other end of the first connecting rod 21 is rotatably connected to the upper end of the first hook 28. The first connecting rod 21 and the first hook 28 are rotatably connected via the first end shaft 24. One end of the second connecting rod 22 is rotatably connected to the connecting shaft 210, and the other end of the second connecting rod 22 is rotatably connected to the upper end of the first hook 28. The second connecting rod 22 and the second hook 27 are rotatably connected via the second end shaft 23.

[0034] The end of the cross shaft 25 extends beyond the first hook 28 and the second hook 27; a positioning hook 26 is rotatably connected to the connecting shaft 210, the positioning hook 26 being used to hook the cross shaft 25, thereby enabling the hook assembly 2 to remain in an open state.

[0035] The hook opening of the positioning hook 26 is inclined towards the direction of the connecting shaft 210, and when the hook assembly 2 is open, the connecting shaft 210 and the cross shaft 25 can come together to automatically disengage the positioning hook 26 from the cross shaft 25. The hook opening of the positioning hook 26 is V-shaped, with one side of the V-shape perpendicular to the length direction of the positioning hook 26 and the other side inclined to the length direction of the positioning hook 26, thus facilitating the inclined engagement between the cross shaft 25 and the positioning hook 26, and thus facilitating the disengagement of the positioning hook 26.

[0036] When using the lifting clamp in this embodiment:

[0037] Two parallel steel rails 3 are installed on sleeper piers, which consist of multiple parallel sleeper piers and are fixedly connected to the steel rails 3. The two steel rails 3 are also fixed by fixing brackets 4 to maintain the position of the steel rails 3.

[0038] When the lifting clamp is hoisted onto the rail 3 using a lifting device, the positioning hook 26 hooks onto the connecting shaft 210, thus keeping the claw assembly 2 open. This facilitates placing the rail 3 between the hook ends of the first claw 28 and the second claw 27 of the claw assembly 2. After the positioning hook 26 is disengaged from the connecting shaft 210, the hook ends of the first claw 28 and the second claw 27 close together, thus clamping the rail 3. Of the four claw assemblies 2, every two clamp one lever.

[0039] During lifting, the square frame 1 lifts the connecting shaft 210 upwards, and then the rail 3 is lifted by the first hook 28, the second hook 27, the first connecting rod 21, and the second connecting rod 22. While lifted, the weight of the rail 3 causes the cross shaft 25 to move away from the connecting shaft 210, thus keeping the hook assembly 2 clamped to the rail 3. This prevents the rail 3 and its sleepers from falling off.

[0040] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation; it is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the scope of this technology.

Claims

1. A lifting clamp suitable for hoisting steel rails, characterized in that: It includes a square frame (1), and a hook assembly (2) is provided at each of the four corners of the square frame (1); The hook assembly (2) includes a first hook (28), a second hook (27), a first connecting rod (21), a second connecting rod (22), and a connecting shaft (210); the first hook (28) and the second hook (27) are intersecting and rotatably connected to each other, the two ends of the first connecting rod (21) are rotatably connected to the upper ends of the connecting shaft (210) and the first hook (28) respectively, and the two ends of the second connecting rod (22) are rotatably connected to the upper ends of the connecting shaft (210) and the second hook (27) respectively; the connecting shaft (210) is fixedly connected to the square frame (1).

2. The lifting clamp for rail hoisting according to claim 1, characterized in that: The first hook (28) and the second hook (27) are rotatably connected to each other via a cross shaft (25), the end of which extends out of the first hook (28) and the second hook (27); a positioning hook (26) is rotatably connected to the connecting shaft (210), and the positioning hook (26) is used to hook the cross shaft (25).

3. The lifting clamp for rail hoisting according to claim 2, characterized in that: The hook opening of the positioning hook (26) is inclined toward the direction of the connecting shaft (210), and when the hook assembly (2) is open, the connecting shaft (210) and the cross shaft (25) can move closer to each other, which can drive the positioning hook (26) and the cross shaft (25) to automatically disengage.

4. The lifting clamp for rail hoisting according to claim 3, characterized in that: The hook opening of the positioning hook (26) is V-shaped. One side of the V-shaped opening is perpendicular to the length direction of the positioning hook (26), and the other side of the V-shaped opening is inclined to the length direction of the positioning hook (26).

5. The lifting clamp for rail hoisting according to claim 1, characterized in that: The first connecting rod (21) and the first hook (28) are rotatably connected through the first end shaft (24); the second connecting rod (22) and the second hook (27) are rotatably connected through the second end shaft (23).

6. The lifting clamp for rail hoisting according to claim 1, characterized in that: The first hook (28) includes two parallel and identical claw bodies, with a reinforcing block (29) connecting the hook ends of the two claw bodies.

7. The lifting clamp for rail hoisting according to claim 6, characterized in that: A reinforcing block (29) is fixedly provided on both sides of the hook end of the second hook (27); the reinforcing block (29) on the first hook (28) is directly opposite to the second hook (27), and the reinforcing block (29) on the second hook (27) is directly opposite to the claw body.

8. The lifting clamp for rail hoisting according to any one of claims 1-7, characterized in that: Lifting fulcrums (11) are provided at the four corners of the square frame (1). The connecting shaft (210) is connected to the lifting fulcrums (11) and is used for connecting the lifting device.

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