Double-ended non-slip eyeglass type wrench

Abstract

The utility model discloses a kind of double-end anti-skid glasses type wrench, including wrench body and the first working head and the second working head of its two end diameters are different. The inner wall of working head includes two long side working surfaces, which are away from the handle of wrench and oppositely arranged along the central axis, and a plurality of anti-skid teeth are provided on the working surface. The first working head has a larger diameter than the second working head, and the size of the anti-skid teeth on the working surface of the first working head is larger than that of the second working head. The utility model sets anti-skid teeth with different sizes on the above-mentioned specific working surface, integrates efficient anti-skid, effective protection of screw corners and one pull multi-use function, has strong structure pertinence, and significantly improves the practicality and reliability of the wrench in different operating scenarios.

Description

Technical Field

[0001] This utility model relates to the field of manual tool technology, and in particular to a wrench for tightening nuts or bolts, specifically a double-headed spectacle-shaped wrench with a specific anti-slip tooth structure. Background Technology

[0002] A box wrench, also known as a spectacle wrench, is a common hand tool with closed, ring-shaped ends resembling eyeglasses. Its advantages include even force distribution, reduced slippage, and suitability for confined spaces.

[0003] However, existing fixed-size eyeglass wrenches have inherent defects: when the screw's edges are slightly worn or the wrench's size is not perfectly matched, slippage easily occurs, leading not only to operational failure but also further exacerbating the wear on the screw's edges. Chinese utility model patent application CN93220795.2 discloses a diamond-shaped double-ended open-end wrench, whose jaws consist of multiple flat or curved surfaces designed to distribute force evenly. However, this solution is still a fixed size and does not address improvements to the internal anti-slip structure of the jaws, thus failing to effectively solve the problems of slippage and screw damage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a double-headed glasses-shaped wrench with a unique structure, good anti-slip effect, and effective protection of screw edges.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a double-ended anti-slip spectacle-shaped wrench, comprising a wrench body and a first working head and a second working head at both ends. The first and second working heads are closed frame-shaped structures with different diameters. The first and second working heads each have two working surfaces on their inner walls. These working surfaces are two long inner walls of the frame-shaped structure, located away from the handle and arranged opposite each other along the central axis. The working surfaces are provided with a plurality of continuously and evenly distributed anti-slip teeth. The diameter of the first working head is larger than that of the second working head, and the size of the anti-slip teeth on its working surface is larger than that on the working surface of the second working head.

[0006] As a preferred embodiment of this utility model, the number of anti-slip teeth distributed on a single working surface of the first working head is 8-12.

[0007] As a preferred embodiment of this utility model, the number of anti-slip teeth distributed on a single working surface of the second working head is 5-7.

[0008] As a preferred embodiment of this utility model, the cross-section of the anti-slip teeth is a truncated quadrangular shape, and its top is a micro-plane.

[0009] As a preferred technical solution of this utility model, the side inclination angle of the quadrangular anti-slip teeth is 60°-85°.

[0010] As a preferred embodiment of this utility model, the wrench body and the working head are made of alloy steel.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Excellent anti-slip performance: Anti-slip teeth are specifically designed on the two relatively long working surfaces that bear the main force. Their inclined sides can effectively embed into the screw edges, producing a mechanical self-locking effect to prevent slippage. 2. Effective protection of screws: The micro-flat design at the top of the retaining teeth avoids stress concentration. While providing great friction, it can reduce the pressure and cutting effect on the screw edges, thus protecting the screw from damage. 3. Targeted structural optimization: The anti-slip structure is innovatively set only on the two working surfaces that bear the main torque, eliminating the ineffective structure on non-stress surfaces, optimizing processing costs, and ensuring the realization of core functions; 4. Dual-head differentiated design: The working heads at both ends are of different sizes and are equipped with different sized teeth, which optimizes the tightening effect of screws of different specifications and makes them highly practical. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model; Figure 3 This is a partially enlarged schematic diagram of the engagement state between the first working head of this utility model and a larger screw; Figure 4 This is a partially enlarged schematic diagram of the engagement state between the second working head of this utility model and a smaller screw; In the diagram: 1. Wrench body; 2. First working head; 3. Second working head; 4. Working surface; 5. Anti-slip teeth; 5a. Micro-plane; 6. Larger screw; 7. Smaller screw. Detailed Implementation

[0013] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0014] In the attached diagram, all identical reference numerals refer to the same components.

[0015] like Figure 1-4 As shown, this utility model provides a double-headed anti-slip glasses-type wrench, including a wrench body 1 and a first working head 2 and a second working head 3 at both ends. The first working head 2 and the second working head 3 are closed frame structures with different diameters, and their inner walls each contain two working surfaces 4. The working surfaces 4 are the two long sides of the inner wall of the frame structure that are away from the handle and are arranged opposite each other along the central axis. The working surfaces 4 are provided with a plurality of continuously and evenly distributed anti-slip teeth 5. The diameter of the first working head 2 is larger than that of the second working head 3, and the size of the anti-slip teeth 5 on its working surface is larger than that on the working surface of the second working head 3.

[0016] The method of using this utility model is as follows: 1. Select either the first working head 2 or the second working head 3 according to the specifications and dimensions of the screw to be tightened; 2. Insert the selected working head onto the screw head, so that the screw edges contact the anti-slip teeth 5 on the working surface 4; 3. Apply rotational torque, and the side of the anti-slip tooth 5 and the micro-plane 5a work together to form a stable engagement with the screw edge.

[0017] Furthermore, the number of anti-slip teeth 5 distributed on a single working surface 4 of the first working head 2 is 10.

[0018] Furthermore, the number of anti-slip teeth 5 distributed on a single working surface 4 of the second working head 3 is 6.

[0019] Furthermore, the cross-section of the anti-slip teeth 5 is a truncated quadrangular shape, and its top is a micro-plane 5a.

[0020] Furthermore, the lateral tilt angle of the frustum-shaped anti-slip teeth 5 is 75°.

[0021] Furthermore, the wrench body 1 and the working head are integrally forged from chromium vanadium alloy steel (50CrV), and the working surface 4 is subjected to carburizing and quenching treatment.

[0022] Specifically, the first working head 2 is suitable for screws with a distance between opposite sides of 24mm. Its working surface 4 has anti-slip teeth 5 with a height of 0.8mm and a top micro-plane 5a with a width of 0.3mm. The second working head 3 is suitable for screws with a distance between opposite sides of 19mm. Its working surface 4 has anti-slip teeth 5 with a height of 0.6mm and a top micro-plane 5a with a width of 0.2mm. Testing showed that this wrench provides significant anti-slip performance when tightening screws of the corresponding specifications, without causing visible damage to the screw edges.

[0023] This utility model is a double-headed anti-slip glasses-type wrench. Its advantages are strong structure, uniform force distribution, and non-slip properties. It is especially suitable for working conditions with limited space, thus improving the practicality and reliability of the wrench in different working scenarios.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-headed, anti-slip, spectacle-shaped wrench, comprising a wrench body (1) and a first working head (2) and a second working head (3) at both ends, wherein the first working head (2) and the second working head (3) are closed frame structures with different diameters, characterized in that: The inner walls of the first working head (2) and the second working head (3) each contain two working surfaces (4). The working surfaces (4) are the two long inner walls of the frame structure that are far from the handle and are arranged opposite each other along the central axis. The working surfaces (4) are provided with a number of continuous and uniformly distributed anti-slip teeth (5). The diameter of the first working head (2) is larger than that of the second working head (3), and the size of the anti-slip teeth (5) on its working surface is larger than that on the working surface of the second working head (3).

2. The dual-ended, non-slip, eyeglass-type hand tool of claim 1, wherein: The number of anti-slip teeth (5) distributed on a single working surface (4) of the first working head (2) is 8-12.

3. The dual-ended, non-slip, eyeglass-type hand tool of claim 2, wherein: The number of anti-slip teeth (5) distributed on a single working surface (4) of the second working head (3) is 5-7.

4. The double-headed anti-slip spectacle-type wrench according to claim 1, characterized in that: The cross-section of the anti-slip teeth (5) is a truncated quadrangular shape, and its top is a micro-plane (5a).

5. The dual-ended, non-slip, eyeglass-type hand tool of claim 4, wherein: The lateral tilt angle of the quadrangular anti-slip teeth (5) is 60°-85°.

6. The dual-ended, slip-resistant, eyeglass-type hand tool of claim 1, wherein: The wrench body (1) and working head are made of alloy steel.

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