Small universal wrench
By designing a small, universal wrench and utilizing a combination of a limit rod and a limit plate, the problem of frequent wrench head adjustments was solved, enabling single-handed operation and stable nut tightening/loosening functions, thus improving operational efficiency.
Patent Information
- Application Number
- CN202520548883.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-26
AI Technical Summary
Existing wrenches require head adjustments or replacements for nuts of different sizes, which is cumbersome and inconvenient, especially since the internal hex socket is prone to falling off.
A small universal wrench was designed, comprising a rod-shaped body, an internal hexagonal collar, a limiting rod, and a limiting plate. The limiting rod is driven by a return spring, and the nut is locked by the limiting plate and the limiting surface of the internal hexagonal collar, realizing one-handed operation and simple tightening and loosening functions.
It enables one-handed operation, is lightweight and adaptable to nuts of different sizes, simplifies the operation process, and improves the efficiency and stability of the wrench.
Smart Images
Figure CN223863665U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of machine tool maintenance tools, and relates to a small universal wrench. Background Technology
[0002] A wrench is a common hand tool used to tighten or loosen bolts, nuts, and other fasteners. Different types of wrenches can be selected based on different usage scenarios, functions, and objects being used. Although there are many types of wrenches, they all require adjustment or replacement of the wrench head to suit the size of the object being used. Replacing the wrench head reduces operational efficiency and inconvenience. Adjusting the jaw size of an adjustable wrench is often cumbersome, requiring trial adjustments before locking it in place. Even after fixing the size, there are issues with matching it to the object (e.g., when an internal hexagonal socket is fitted onto a hexagonal nut, due to the similar size, refitting it after it falls off is not easy). Utility Model Content
[0003] The purpose of this utility model is to address the aforementioned problems in the existing technology by providing a small, universal wrench. The technical problem to be solved by this utility model is how to make operation easier.
[0004] The purpose of this utility model can be achieved through the following technical solution: a small universal wrench, characterized in that it includes a rod-shaped body, the front end of the body has an internal hexagonal collar, a limiting rod is slidably connected to the body along the length direction of the body, the front end of the limiting rod has a limiting plate, and the rear end of the limiting rod has a concave force-receiving fork.
[0005] Furthermore, the limiting plate is in the shape of a flat plate, and the limiting plate is parallel to one of the limiting surfaces of the internal hexagonal collar.
[0006] Furthermore, the limiting plate is L-shaped and includes two halves at a 120° angle.
[0007] Furthermore, a return spring is sleeved on the limiting rod, and the return spring can drive the front end of the limiting rod away from the internal hexagonal collar.
[0008] This solution provides a small, universal wrench that can be operated with one hand. Hold the main body and control the force fork with your thumb. When the limiting rod is released, the large inner hole of the hexagonal collar allows for easy fitting with hexagonal or dodecagonal nuts. After pressing the limiting rod, the limiting plate presses against the nut fitted inside the hexagonal collar. The nut is locked using one of the limiting surfaces of the hexagonal collar and the limiting plate, providing resistance to the relative rotation of the main body and the nut, thus allowing for torsion loosening or torsion tightening of the nut. It is easy to see that its operation is very simple and adaptable to the tightness of hexagonal nuts of different sizes within a certain range. Attached Figure Description
[0009] Figure 1 This is a structural diagram of this small universal wrench.
[0010] In the diagram, 1. Body; 2. Hexagonal socket; 3. Limiting rod; 4. Limiting plate; 5. Force-bearing fork; 6. Return spring. Detailed Implementation
[0011] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0012] like Figure 1 The small universal wrench shown includes a rod-shaped body 1, with an internal hexagonal collar 2 at the front end of the body 1. A limiting rod 3 is slidably connected to the body 1 along its length. The front end of the limiting rod 3 has a limiting plate 4, and the rear end of the limiting rod 3 has a concave force-receiving fork 5. The limiting plate 4 is flat and parallel to one of the limiting surfaces of the internal hexagonal collar 2.
[0013] A reset spring 6 is fitted on the limiting rod 3. The reset spring 6 can drive the front end of the limiting rod 3 away from the internal hexagonal collar 2.
[0014] This solution provides a small, universal wrench that can be operated with one hand. Hold the main body 1 and control the force fork 5 with your thumb. When the limiting rod 3 is released, the inner hole of the hexagonal collar 2 is large enough to easily fit with external hexagonal or external dodecagonal nuts. After pressing the limiting rod 3, the limiting plate 4 presses against the nut fitted inside the hexagonal collar. The nut is locked by one of the limiting surfaces of the hexagonal collar 2 and the limiting plate 4, providing resistance to the relative rotation of the main body 1 and the nut, thus enabling the nut to be twisted to loosen or tighten. It is easy to see that its operation is very simple and it can adapt to the tightness of external hexagonal nuts of different sizes within a certain range.
[0015] Alternatively, the limiting plate 4 can also be L-shaped, consisting of two halves at a 120° angle.
[0016] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A small universal wrench, characterized in that, It includes a rod-shaped body (1), the front end of which has an internal hexagonal collar (2), a limiting rod (3) slidably connected to the body (1) along the length direction of the body (1), the front end of the limiting rod (3) has a limiting plate (4), and the rear end of the limiting rod (3) has a concave force-bearing fork (5).
2. The small universal wrench according to claim 1, characterized in that, The limiting plate (4) is flat and parallel to one of the limiting surfaces of the internal hexagonal collar (2).
3. The small universal wrench according to claim 1, characterized in that, The limiting plate (4) is L-shaped and includes two halves at a 120° angle.
4. A small universal wrench according to claim 1, 2, or 3, characterized in that, A reset spring (6) is sleeved on the limiting rod (3), and the reset spring (6) can drive the front end of the limiting rod (3) away from the internal hexagonal collar (2).