Bolt removal auxiliary tools
By designing a bolt disassembly tool with internal threads and a slag groove, the problem of nuts being difficult to disassemble when rotating together with screws during mining transportation was solved, enabling a single person to quickly disassemble nuts and reducing the need for equipment and different types of workers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANSTEEL GROUP MINING CO LTD
- Filing Date
- 2025-04-23
- Publication Date
- 2026-07-17
AI Technical Summary
In mining transportation, when disassembling the outer end cover of the pulley bearing housing, the nut rotates together with the screw, making disassembly difficult. This requires the cooperation of multiple trades and is time-consuming and labor-intensive. Especially when the nut is not severely corroded, existing tools are not effective in disassembling it.
A bolt removal tool was designed, comprising two hinged handles forming a pliers head. The inner wall is provided with internal threads and a chip groove with the same parameters as the bolt, which are used to hold the exposed bolt and remove obstacles, and the friction of the internal and external threads is used to remove the nut.
This technology enables a single person to easily and effortlessly disassemble nuts when the corrosion is not severe, avoiding the use of large equipment and multi-tasking collaboration, thus improving disassembly efficiency and convenience.
Smart Images
Figure CN224509588U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of auxiliary tool and equipment technology, and in particular relates to an auxiliary tool for disassembling bolts. Background Technology
[0002] In mining, ore transportation often utilizes belt conveyors. The head pulley, tail pulley, intermediate pulleys, return pulleys, and various additional pulleys all have two bearing seats, secured to the bearings using extended bolts through holes in the end caps on both sides. For safety reasons, every shaft must have a sleeve, and every wheel must have a cover; all wheels have covers. For dust prevention, the head and tail pulleys are semi-enclosed, with only the outer end caps of the bearing seats exposed. When disassembling the outer end caps for inspection and lubrication, the nut and bolt rotate together, and the hexagonal bolt, fixed inside the large cover, is very inconvenient. If the nut cannot be removed, the end cap cannot be opened for subsequent operations. Adjusting the cover requires a crane, scaffolders, and crane operators, which is time-consuming and labor-intensive. Many other situations exist on-site where only the nut and part of the bolt's external thread are exposed. A new type of bolt removal tool is needed to facilitate disassembly. Summary of the Invention
[0003] The purpose of this utility model is to provide an auxiliary tool for disassembling bolts. When disassembling a long bolt, only the nut and part of the external thread of the bolt are exposed on the outside. It is not necessary to disassemble a large cover or the hexagonal part that affects the fixing of the bolt. It can also save the work of multiple trades such as cranes, scaffolders, and crane operators.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] The present invention relates to a bolt removal auxiliary tool, characterized in that it includes two handles hinged at a movable hinge point, the heads of which are joined together to form a pliers head, and an internal thread and a slag groove are provided on the inner wall of the pliers head.
[0006] The parameters of the internal thread are the same as those of the screw to be disassembled.
[0007] The melting grooves are evenly distributed on the inner wall of the pliers head.
[0008] Advantages of this utility model:
[0009] This utility model provides a bolt disassembly auxiliary tool. When the nut is not severely corroded, the nut and bolt rotate together, and it is inconvenient to fix the bolt. This tool can be used to save time and effort, and is convenient and quick. One person can operate it, avoiding the time-consuming and laborious multi-tasking work of disassembling the safety cover. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0011] The specific embodiments of this utility model are further described below with reference to the accompanying drawings.
[0012] like Figure 1 As shown, the bolt removal auxiliary tool of this utility model is characterized by including two handles 4 hinged at the movable hinge point 3, the heads of the two handles 4 forming a pliers head, and an internal thread 1 and a slag groove 2 provided on the inner wall of the pliers head.
[0013] The parameters of the internal thread 1 are the same as those of the screw to be disassembled.
[0014] The melting grooves 2 are evenly distributed on the inner wall of the pliers head.
[0015] When the nut and screw cannot be removed by rotating them together, and fixing the screw is difficult and inconvenient, consider using the exposed thread for fixation. Directly clamping with wire cutters or pipe wrenches will damage the threads, making the nut even harder to remove. In cases of severe bolt corrosion, the bolt may be directly damaged. However, if the corrosion is not severe, and only dust, sludge, or impurities are affecting the nut's rotation, only minimal resistance is needed to keep the screw stationary, allowing for nut removal. Use an internal thread (1) with the same parameters as the screw to clamp the exposed screw and rotate it to remove the sludge, dust, and impurities. Then apply force to expose the screw and fix it in place, allowing for nut removal. This tool works similarly to wire cutters, except the jaws are machined with an internal thread (1) matching the bolt's parameters. Alternatively, a die with external threads can be cut open and fitted with a handle to create a tool.
[0016] Specific implementation process:
[0017] 1. Use a wrench to remove the nut and pull out the screw.
[0018] 2. This tool can be used when the nut is being removed and rotated together with the screw.
[0019] 3. Place the special tool on the exposed screw rod, so that its inner thread 1 fits into the outer thread of the screw rod. Apply external force and use the friction between the inner and outer threads to fix the screw rod. Then tighten the nut to expose more of the outer thread.
[0020] 4. Use a special rotating tool to remove sludge, dust, and impurities from the external threads that are hindering the rotation of the nut.
[0021] 5. Spray thread loosening fluid and rotate the special tool again.
[0022] 6. After cleaning the exposed external threads, use the special tool to clamp the nut again and use an open-end wrench to remove it.
[0023] 7. When the nut comes into contact with the special tool, you can move the special tool outwards a little before removing the nut.
[0024] 8. A special tool with a sufficiently long external thread can be used to grip the inside of the nut, that is, the rotated external thread section, until it is completely removed.
[0025] This utility model provides a bolt disassembly auxiliary tool. When the nut is not severely corroded, the nut and bolt rotate together, and it is inconvenient to fix the bolt. This tool can be used to save time and effort, and is convenient and quick. One person can operate it, avoiding the time-consuming and laborious multi-tasking work of disassembling the safety cover.
Claims
1. A disassembly bolt auxiliary tool characterized by, Two handles are hinged at a movable hinge point, the heads of the two handles form a pincer head, internal threads and swarf grooves are arranged on the inner wall of the pincer head, The parameters of the internal threads are the same as those of the screw to be disassembled.
2. The disassembly bolt auxiliary tool according to claim 1, characterized by, The swarf grooves are uniformly distributed on the inner wall of the pincer head.