Special hoisting tool for light steel rail

Abstract

The utility model discloses a special hoisting tool for a light steel rail, which is characterized in that a clamping piece of the special hoisting tool is an integrally formed arc-shaped plate, or the clamping piece is provided with a flat plate, and the two sides of the flat plate are respectively provided with an arc-shaped plate which is bent downwards and is integrally formed with the flat plate; the arc-shaped plate is provided with two flush lower side edges, and the distance between the two lower side edges is smaller than the width of a rail head or a rail bottom of a hung steel rail and larger than the width of a rail waist of the hung steel rail. The two ends of the hoisting ring are respectively welded on the clamping pieces; the fastening bolt penetrates through the clamping piece, and the inner end of the fastening bolt is used for tightly jacking the light rail. The main body part only comprises an integrally formed clamping piece, a hoisting ring welded on the clamping piece and a set of bolts. Components are few, machining is convenient, cost is low, and maintenance is not needed. The steel rail cannot fall off in the hoisting and transferring process, the clamp is firm, the clamping performance is reliable, and potential safety hazards caused by connection failure do not exist.

Description

Technical Field

[0001] This utility model relates to a tool for hoisting and transferring steel rails. Background Technology

[0002] Light rails (or simply light rails) are a common production material in mining machinery repair shops. In recent years, with the continuous increase in usage and material specifications, the workload of handling light rails has become increasingly heavy. The traditional handling method involves vehicle transfer and manual loading and unloading. This method has disadvantages such as high labor intensity, difficulty in ensuring occupational safety, and low work efficiency.

[0003] Publicly available patent documents disclose a variety of rail hoisting devices, but they generally suffer from drawbacks such as complex construction, high manufacturing costs, and poor reliability. For example, utility model patent CN219194189U discloses "a hydraulic clamp for rail hoisting," which requires a hydraulic system to clamp the rail. This device suffers from drawbacks such as complex tool construction and high manufacturing costs. The introduction of a hydraulic system also raises issues regarding the reliability of hydraulic oil sealing. For example, utility model patent CN217148280U discloses a "rail lifting device," which includes a first clamping plate and a second clamping plate. Both the top inner sides of the first and second clamping plates are equipped with mating clamping plates, which are fitted together. A lifting ring is provided between the tops of the two mating clamping plates, and the bottom ends of the two mating clamping plates are locked together by a locking pin. A clamping groove is formed between the first and second clamping plates to accommodate the top of the rail. A locking bolt base is provided at the bottom of the first clamping plate, with a locking bolt internally threaded onto it. The inner end of the locking bolt abuts against the middle of the right side wall of the rail. A rubber pad base is provided at the bottom of the second clamping plate, with a countersunk bolt inside. The inner end of the countersunk bolt has a rubber pad, and the inner side of the rubber pad abuts against the middle of the left side wall of the rail. This lifting device achieves rail lifting through multiple components, but it also suffers from complex construction and high manufacturing costs.

[0004] The utility model patent "Rail Lifting Tool" with authorization announcement number CN202829301U belongs to a relatively simple technology in this type of patent. It includes a crossbeam and two hooks. A lifting hole is set in the middle of the crossbeam, and the hooks are symmetrically arranged on both sides of the lifting hole. The hooks are hinged to the crossbeam, and a rail fixing space is formed between the hooks. The main body of this tool still requires assembly of multiple components such as a crossbeam, two hooks, and two pins. The large number of components inevitably leads to time-consuming and labor-intensive assembly, and there are safety hazards caused by failure of connections between components during use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a lightweight rail hoisting tool that uses as few parts as possible to reduce manufacturing and maintenance costs and has better reliability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A special lifting tool for lightweight steel rails includes a main body. The main body includes a clamping member, which is an integrally formed arc-shaped plate, or the clamping member has a flat plate with arc-shaped plates bent downwards and integrally formed with the flat plate on both sides. The arc-shaped plates have two flush lower edges, the distance between which is less than the width of the rail head or rail bottom of the suspended rail and greater than the width of the rail web of the suspended rail. The main body also includes a lifting ring, the two ends of which are welded to the clamping member. The main body also includes a fastening bolt that passes through the clamping member and whose inner end is used to tighten the light rail.

[0008] Preferably, one end of the clamping member is fixedly connected to a centering rod; the centering rod is aligned with the direction of the clamping member.

[0009] Preferably, the lifting tool further includes a fork arm attachment used in conjunction with the main body; the fork arm attachment includes an attachment body with a fork groove at the rear end; a rear stop block extending upward is fixedly installed at the rear end of the attachment body; a front stop block is connected to the front end of the attachment body via a torsion spring; and a limiting block for blocking the front stop block from the front is provided at the front end of the attachment body.

[0010] The positive effects of this utility model are as follows:

[0011] First, the main body of this utility model lifting tool consists of only one integrally formed clamping component, one lifting ring welded to the clamping component, and a set of bolts. It has few components, is easy to manufacture, has low cost, and requires no maintenance. In use, the rail head or bottom is inserted into the clamping component axially (i.e., along the rail's direction), and the two lower sides of the clamping component are used to hold the rail head or bottom, then the fastening screws are tightened. Because the distance between the two lower sides is less than the width of the held rail head or bottom, the rail will not fall off during lifting and transportation. The clamp is sturdy, its clamping performance is reliable, and there are no safety hazards caused by connection failure.

[0012] Secondly, to facilitate forklift transport, the optimized technical solution of this utility model also includes a forklift attachment specifically designed for use with the main body. The forklift attachment is equipped with front and rear stops. During light rail transport, especially during sudden forklift speed changes or rapid turns, the lifting ring is blocked and limited by the limiting blocks of the forklift attachment, preventing the lifting tools and light rail from falling off, further improving operational safety.

[0013] Third, the optimized technical solution of this utility model also includes a specially designed centering rod. During use, the center position along the length direction can be drawn on the light rail to be hoisted, or a position marker can be placed on the side of the light rail to indicate the center position of a set of light rails. After the light rail is fitted into the clamping component, sliding it ensures that the outer end of the centering rod is at the center position, guaranteeing that the two clamping components are arranged approximately symmetrically around the center of the light rail. This design avoids the impact caused by the unbalanced force applied to the forklift due to the eccentric arrangement of the two clamping components, further improving operational safety.

[0014] Fourth, practical use has proven that this utility model has high operational efficiency. Compared with the traditional method of using lifting slings for hoisting, taking the fixed placement of a bundle of 30kg / m light rail as an example, it used to require one person to pry it open and another person to wear the lifting sling and work with a forklift. Now, only one person is needed to work with a forklift. The fixed placement time for a single bundle of materials has been shortened from 40 minutes to 25 minutes.

[0015] Fifth, since there is no need to pry the light rail to thread the hoisting strap during operation, the risks of hand and foot injuries, squeezing injuries, and crushing injuries are avoided. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0017] Figure 2 This is a structural schematic diagram of the fork arm attachment in Embodiment 1 of this utility model.

[0018] Figure 3 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0019] Figure 4 This is a schematic diagram showing the usage status of the hoisting tool in Embodiment 1.

[0020] Figure 5 This is a schematic diagram showing the usage status of the hoisting tool in Embodiment 2.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Clamping component; 2. Lifting ring; 3. Fastening bolt; 4. Centering rod; 5. Accessory body; 6. Front stop block; 7. Torsion spring; 8. Fork groove; 9. Fastening screw; 10. Fork arm; 11. Rear stop block; 12. Light rail. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] The embodiment of this utility model of a lightweight steel rail hoisting tool includes a main body and a fork arm attachment used in conjunction with the main body. Example

[0025] like Figure 1The main body includes a clamping component 1, which is an integrally formed arc-shaped plate with two flush lower edges. The distance between these two lower edges is less than the width of the rail head or bottom of the suspended rail, but greater than the width of the rail web. Specifically, the clamping component 1 is made by cutting a small portion of the arc-shaped pipe wall plate from a circular or elliptical steel pipe along a direction parallel to the axis. The two cut portions of the remaining pipe wall plate serve as the two lower edges. If the bottom of the rail to be hoisted is facing upwards, the distance between the two lower edges must be less than the width of the bottom of the suspended rail. Figure 4 As shown, the rail head of the light rail 12 to be hoisted faces upwards, and the distance between the two lower sides is required to be less than the width of the rail head and greater than the width of the rail web of the light rail 12. The clamping member 1 is generally made of carbon steel.

[0026] The main body also includes a lifting ring 2 formed by bending a steel bar, with both ends of the steel bar welded to the clamping member 1.

[0027] The main body also includes an arc-shaped plate passing through the clamping member 1 and a fastening bolt 3 at its inner end for tightening the light rail, such as Figure 4 and Figure 5 .

[0028] Furthermore, one end of the clamping member 1 is fixedly connected to a centering rod 4, which is aligned with the direction of the clamping member 1.

[0029] To facilitate the transport of light rail using a forklift, this embodiment further includes a forklift attachment used in conjunction with the main body. For example... Figure 3 The fork arm attachment includes an attachment body 5 with a fork groove 8 at its rear end (the end connected to the fork arm of the forklift). A rear stop block 11 extending upwards is fixedly installed at the rear end of the attachment body 5. A front stop block 6 is connected to the front end of the attachment body 5 via a torsion spring 7. A limiting block for blocking the front stop block 6 from the front is provided at the front end of the attachment body 5. When the torsion spring 7 is not under force, the front stop block 6 extends upwards. When the torsion spring 7 is impacted by the lifting ring 2 and subjected to a rearward force, the upper end of the front stop block 6 falls backwards. After the force is released, it returns to its original position (extending upwards) due to the torsion spring 7. When the torsion spring 7 is impacted by the lifting ring 2 and subjected to a forward force, the front stop block 6 is blocked by the limiting block, preventing the lifting ring 2 from falling off the front end of the attachment body 5.

[0030] In use, the fork arm 10 of the forklift is inserted into the fork slot 8 and fixed in the fork slot 8 by the fastening screws 9. The forklift moves forward, so that the fork arm attachment passes through the lifting ring 2. The contact position between the lifting ring 2 and the attachment body 5 is located between the rear stop 11 and the front stop 6. Example

[0031] The difference between this embodiment and Embodiment 1 lies in the shape of the clamping member 1. For example... Figure 3The clamping member 1 has a flat plate with two curved plates on its sides that are bent downwards and integrally formed with the plate. These two curved plates have two flush lower edges for suspending the light rail. The clamping member 1 is formed by bending a rectangular steel plate, with the two opposite sides of the rectangle serving as the two lower edges after bending. This embodiment differs from Embodiment 1 in that the fastening bolt 3 passes through the flat plate.

[0032] like Figure 5 As shown, the bottom of the light rail 12 to be hoisted faces upwards, and the distance between the two lower sides is required to be less than the width of the bottom of the suspended rail.

[0033] During the transfer of a batch of rails, the fork arm attachment is always installed on the fork arm of the forklift, and is removed when the transfer is completed and the forklift is to be used for other purposes.

[0034] In use, two sets of tools are generally used to hoist the same light rail. Insert the clamping piece 1 into the end of the light rail 12 and tighten the fastening bolt 3 to lift and transport it.

Claims

1. A special lifting tool for lightweight steel rails, comprising a main body, wherein the main body includes a clamping member (1), characterized in that: The clamping member (1) is an integrally formed arc plate, or the clamping member (1) has a flat plate with arc plates bent downwards and integrally formed with the flat plate on both sides; the arc plate has two flush lower sides, the distance between the two lower sides is less than the width of the rail head or rail bottom of the suspended rail, and greater than the width of the rail web of the suspended rail; the main body also includes a lifting ring (2), the two ends of which are welded to the clamping member (1); the main body also includes a fastening bolt (3) that passes through the clamping member (1) and whose inner end is used to tighten the light rail.

2. The special lifting tool for lightweight steel rails as described in claim 1, characterized in that: One end of the clamping member (1) is fixedly connected to a centering rod (4); the centering rod (4) is aligned with the direction of the clamping member (1).

3. The special lifting tool for lightweight steel rails as described in claim 1 or 2, characterized in that: The hoisting tool also includes a fork arm attachment used in conjunction with the main body; the fork arm attachment includes an attachment body (5) with a fork groove (8) at the rear end; a rear stop block (11) extending upward is fixedly installed at the rear end of the attachment body (5); a front stop block (6) is connected to the front end of the attachment body (5) via a torsion spring (7); a limiting block for blocking the front stop block (6) from the front is provided at the front end of the attachment body (5).

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