A telescoping handle device
By designing a telescopic wrench handle device, the problem of inconvenient adjustment of the power arm length when installing or removing nuts was solved, realizing flexible adjustment of the power arm and improving the operating efficiency of steel rolling production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING IRON & STEEL CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-09
AI Technical Summary
In steel rolling production, existing wrench devices require frequent adjustments to the power arm length when installing or removing nuts, resulting in long operation times and reduced work efficiency.
A telescopic lever device was designed, which extends or shortens the power arm as needed by setting an extension handle that can be pulled out and retracted inside the lever handle to adapt to the operational needs of tightening and loosening nuts.
By extending the reach of the handle, the operation time is shortened, and the efficiency of nut assembly and disassembly and the overall work efficiency are improved.
Smart Images
Figure CN224334360U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of nut removal and installation tools, and in particular to a retractable wrench handle device. Background Technology
[0002] In steel rolling production, process roll and hole changes are crucial tasks. Effectively organizing these changes to save time requires not only skilled installation techniques but also minimizing tedious operations. For example, the nuts on the inlet and outlet guides must be tightly tightened to prevent production malfunctions, quality issues, and significant cost losses. However, tightening nuts, whether installing or removing them, requires extending the lever arm. Wrenches utilize the lever principle. Tightening nuts requires extending the handle (lever arm); loosening nuts requires shortening the handle (lever arm), thus reducing operation time, increasing efficiency, and improving profitability. Therefore, a telescopic wrench handle device is urgently needed. Utility Model Content
[0003] To solve the above technical problems, this utility model provides a telescopic handle device. When the nut is tightened, the extension handle can be pulled out to extend the power arm; when the nut is loosened, the extension handle can be retracted into the steel pipe to shorten the power arm. This can shorten the operation time and improve the work efficiency.
[0004] The telescopic wrench handle device in this solution includes a wrench and a handle connected thereto. The handle is a hollow tubular structure with an opening at one end, and the opening is located at the end away from the wrench. An extension handle is movably inserted into the cavity inside the handle along its length, and a welding rod is connected to the inner end of the extension handle. The cross-sectional area of the welding rod is larger than the cross-sectional area of the opening.
[0005] Furthermore, the handle is parallel to the working plane of the wrench.
[0006] Furthermore, the end of the wrench handle is welded to the outer wall of the wrench.
[0007] Furthermore, the wrench is an internal hex wrench socket.
[0008] Furthermore, the handle is a 500mm long steel pipe, and the extension handle is a 550mm long round steel bar.
[0009] Furthermore, the outer wall of the handle and / or extension handle is coated with an anti-rust paint layer.
[0010] The beneficial effects of this utility model are: the telescopic wrench device provided by this utility model can extend the extension handle to lengthen the power arm when the nut is tightened; when the nut is loosened, the extension handle can be retracted into the steel pipe to shorten the power arm. This can shorten the operation time and improve the work efficiency, and is suitable for convenient nut disassembly and assembly scenarios. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the retractable lever handle device in a specific embodiment of this utility model;
[0012] The components are: 1. handle; 2. extension handle; 3. welding rod; 4. opening; 5. wrench. Detailed Implementation
[0013] The retractable lever device provided in this embodiment is as follows: Figure 1 As shown, the device includes a wrench 5 and a handle 1 welded to its outer wall. The handle 1 is a hollow tubular structure with an opening 4 at its end. In this embodiment, the handle 1 is a 500mm long steel pipe, and the opening 4 is located at the end away from the wrench 5. An extension handle 2 is movably inserted into the cavity inside the handle 1 along its length. In this embodiment, the extension handle 2 is a 550mm long round steel bar, and a welding rod 3 is connected to the inner end of the extension handle 2. The cross-sectional area of the welding rod 3 is larger than the cross-sectional area of the opening 4, so that the extension handle 2 can slide in the cavity of the handle 1 without detaching from the handle 1.
[0014] In this embodiment, the wrench 5 is an internal hex wrench socket. In some other embodiments, the wrench 5 may also be other types of internal hex wrench sockets. The handle 1 is parallel to the working plane of the wrench 5. Of course, in other embodiments, the handle 1 may also be arranged at an angle so that one end of the opening 4 faces upward and is welded to the side wall of the wrench 5.
[0015] In some specific embodiments, the outer walls of both the handle 1 and the extension handle 2 are coated with an anti-rust paint layer to prevent rust.
[0016] The manufacturing process of the retractable lever device in this embodiment is as follows:
[0017] (1) Select a steel pipe with a diameter of 30-40mm, and the surface should not have obvious rust and the quality should be good; (2) Cut a 500mm long steel pipe from the steel pipe as the handle 1, grind both ends to remove obvious burrs, and weld one end to the wrench 5; (3) Select a relatively straight round steel and cut a 550mm long steel pipe as the extension handle 2; (4) Weld a circle with welding rod 3 at one end of the round steel, grind the other end to remove obvious burrs; (5) Insert the welded end of the extension handle 2 into the steel pipe, heat the end of the handle 1 with a cutter, and use a small hammer to knock the end of the handle 1 inward until the extension handle 2 cannot be pulled out, and then let it cool naturally; (6) Check whether the extension handle 2 runs smoothly, and brush the whole thing with anti-rust paint or oil for corrosion prevention.
[0018] In addition to the above embodiments, the present invention may have other implementation methods; all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.
Claims
1. A telescopic handle device for a spanner (5) comprising a spanner handle (1) connected to the spanner, characterized in that, The wrench handle (1) is a hollow tubular structure with an opening (4) at one end, and the opening (4) is arranged at the end away from the wrench (5), the cavity in the wrench handle (1) movably inserts an extension handle (2) along the length direction, and the inner end of the extension handle (2) is connected with a welding rod (3), and the cross-sectional area of the welding rod (3) is larger than that of the opening (4).
2. The telescoping handle arrangement of claim 1, wherein, The wrench handle (1) is parallel to the working plane of the wrench (5).
3. The telescoping handle arrangement of claim 1, wherein, The end of the wrench handle (1) is welded on the outer side wall of the wrench (5).
4. The telescoping handle arrangement of claim 1, wherein, The wrench (5) is an inner hexagonal wrench sleeve.
5. The telescoping handle arrangement of claim 1, wherein, The wrench handle (1) is a 500mm long steel pipe, and the extension handle (2) is a 550mm long round steel.
6. The telescoping handle arrangement of claim 1, wherein, The outer wall of the wrench handle (1) and / or the extension handle (2) is coated with a rust-proof paint layer.