Lifting and overturning anti-falling lifting nail for large tool and tool casting

Abstract

The utility model relates to an anti-falling lifting nail for hoisting and overturning a large tool and a tool casting, which solves the problems that the lifting nail falls off accidentally or is difficult to disassemble when the large tool and the tool casting are hoisted and overturned, and the like. Comprising a lifting nail, a movable check ring and a welding check block, the lifting nail is in a step shaft shape, the large end of the lifting nail is equal to the outer diameter of the movable check ring and the welding check block and is in clearance fit with an inner diameter hole of a casting 4, the small end of the lifting nail penetrates through inner holes of the movable check ring and the welding check block and is welded to the welding check block, and the movable check ring is installed between the lifting nail and the welding check block and can move in the radial direction of the lifting nail. Chamfers are arranged at the ends of the welding check block and the movable check ring. According to the lifting nail, the working part of the lifting nail is designed into a structure of the lifting nail, the movable check ring and the welding check block, so that the technical problem that the lifting nail falls off accidentally or is difficult to disassemble when a large tool and a tool casting are lifted and overturned is solved fundamentally, and the use efficiency and safety protection of lifting and overturning of the large tool and the tool casting are improved.

Description

Technical Field

[0001] This utility model belongs to the field of tool and fixture processing technology, specifically relating to a lifting nail for preventing the lifting and turning of large tool and fixture castings. Background Technology

[0002] Currently, the lifting spikes used for lifting and turning over tools and tooling castings in China all adopt the industry standard structure. When the tools and tooling castings are being lifted and turned over, the working part of the lifting spike will move axially due to factors such as friction and slippage of the wire rope. The inevitable result is that the locking nut at the end of the lifting spike will loosen or the cotter pin will break, which poses certain safety hazards. At the same time, it also has the problems of cumbersome disassembly and assembly and low work efficiency.

[0003] To address this issue, the efficiency and safety of hoisting and turning large tools, fixtures, and castings have been improved. Utility Model Content

[0004] This utility model provides a structural design for preventing the lifting spikes from falling off during the lifting and turning of large tool and fixture castings. The lifting spike structure is designed as a combination of a lifting spike, a movable retaining ring, and a welded stop block, fundamentally solving problems such as "accidental detachment of the lifting spikes or difficulty in disassembly" during the lifting and turning of large tool and fixture castings. This improves the efficiency and safety of lifting and turning large tool and fixture castings.

[0005] This utility model is achieved through the following technical solution:

[0006] A lifting spike for hoisting, turning, and preventing detachment of large tool and fixture castings includes a lifting spike 1, a movable retaining ring 2, and a welded stop block 3. The lifting spike 1 is a stepped shaft shape, with its large end having the same outer diameter as the movable retaining ring 2 and the welded stop block 3, and a clearance fit with the inner diameter hole of the casting 4. Its small end passes through the inner hole of the movable retaining ring 2 and the welded stop block 3 and is welded to the welded stop block 3. The movable retaining ring 2 is installed between the lifting spike 1 and the welded stop block 3 and can move radially along the lifting spike 1.

[0007] The ends of the welding stop 3 and the movable retaining ring 2 are chamfered.

[0008] This utility model designs the working part of the lifting nail as a structure of lifting nail 1 + movable retaining ring 2 + welded stop block 3, which fundamentally solves the technical problem of "the lifting nail 1 accidentally falling off or being difficult to disassemble when lifting and turning large tools and tooling castings", and improves the efficiency and safety protection of lifting and turning large tools and tooling castings. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2This is an exploded view of the assembly of the heavy nail 1, movable retaining ring 2, and welded retaining block 3 of this utility model. Detailed Implementation

[0011] like Figure 1 , 2 This utility model provides a structural design for a lifting nail to prevent detachment during the lifting and tilting of large tool and fixture castings. The design consists of a lifting nail 1, a movable retaining ring 2, and a welded stop block 3. Addressing the technical challenge of axial movement of the working part of the lifting nail during the lifting and tilting process of the tool and fixture casting 4, which can cause the locking nut to loosen or the cotter pin to break, this design utilizes a lifting nail 1 + movable retaining ring 2 + welded stop block 3 structure. The outer diameters of the lifting nail 1, movable retaining ring 2, and welded stop block 3 are equal, forming a clearance fit with the inner diameter hole of the casting 4. The welded stop block 3 welds the lifting nail 1 and prevents the movable retaining ring 2 from falling off. The movable retaining ring 2 falls naturally under gravity, creating a height difference with the outer diameters of the lifting nail 1 and welded stop block 3, thus securing the lifting nail 1 to the casting 4 and preventing it from falling off. To facilitate the insertion of the lifting nail 1 into the casting 4, the ends of the welded stop block 3 and movable retaining ring 2 are chamfered. When disassembling the lifting nail 1, simply reset the height difference of the movable retaining ring 2 (the outer diameter of the movable retaining ring 2 is on the same plane as the lifting nail 1 and the welded stop block 3), and the lifting nail 1 can be removed.

Claims

1. A lifting spike for hoisting and tilting large tool and fixture castings to prevent them from slipping off, characterized in that: It includes a lifting nail, a movable retaining ring, and a welded block. The lifting nail is a stepped shaft. The large end is equal to the outer diameter of the movable retaining ring and the welded block, and is clearance-fitted with the inner diameter hole of the casting (4). The small end is inserted into the inner hole of the movable retaining ring and the welded block and is welded to the welded block. The movable retaining ring is installed between the lifting nail and the welded block and can move radially along the lifting nail.

2. The lifting spike for hoisting and tilting large tools and fixture castings according to claim 1, characterized in that: The welded stop block and the movable retaining ring have chamfered ends.

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