Open-end wrench with asymmetrical opening structure

Abstract

This utility model provides an open-end wrench with an asymmetrical opening structure, comprising: a handle and a working head connected together, the working head being connected to one end of the handle, wherein: the working head is provided with an opening, and a force-bearing surface facing the opening, two force-applying surfaces, at least one rounded corner surface, at least one fixed surface, a plurality of grooves and a locking surface, the force-bearing surface facing the two force-applying surfaces, the two force-applying surfaces being a first force-applying surface and a second force-applying surface, a rounded corner surface between the fixed surface and the first force-applying surface, at least one groove between the first force-applying surface and the second force-applying surface, and a groove between the second force-applying surface and the locking surface.

Description

Technical Field

[0001] This utility model relates to an open-end wrench, and more particularly to an open-end wrench with an asymmetrical opening structure. Background Technology

[0002] Commonly known open-end wrenches have open-end structures where both sides are either smooth or have teeth designed to increase friction. The tooth design can be either symmetrical or asymmetrical. The asymmetrical design features concave grooves to avoid the corners of the nut. However, this design has several drawbacks: First, because one side of the wrench has multiple concave grooves, the end face areas between these grooves are discontinuous, effectively reducing the contact area with the nut. Second, the multiple concave grooves result in uneven stress distribution, easily leading to stress concentration during use, reducing the overall strength of the wrench, and failing to provide optimal force application. Utility Model Content

[0003] This utility model provides an open-end wrench with an asymmetrical opening structure, the main purpose of which is to enable the wrench to provide maximum force and effectively avoid damage or breakage of the wrench.

[0004] To achieve the aforementioned objectives, this utility model provides an open-end wrench with an asymmetrical opening structure, comprising:

[0005] A handle and a working head are connected, the working head being connected to one end of the handle. The working head has an opening, a force-receiving surface, two force-applying surfaces, at least one rounded corner surface, at least one fixing surface, a plurality of grooves, and a locking surface facing the opening. The force-receiving surface faces the two force-applying surfaces, which are a first force-applying surface and a second force-applying surface. The fixed surface and the first force-applying surface have the rounded corner surface. The first force-applying surface and the second force-applying surface have at least one groove. The second force-applying surface and the locking surface have one groove.

[0006] As described above, when the nut is placed in the opening, one of the two sides of the nut abuts against the force-applying surface, and the other side abuts against the force-receiving surface. When the user rotates the wrench in a first direction, the force is applied to the nut from the second force-applying surface of the wrench, and when the user rotates the wrench in a second direction, the force is applied to the nut from the first force-applying surface of the wrench. Therefore, the force can be transmitted to the nut from the first force-applying surface and the second force-applying surface. Since the first force-applying surface and the second force-applying surface have a large area, they can provide greater force strength and stronger structural strength, so as to effectively prevent the wrench from being damaged or missing. Attached Figure Description

[0007] Figure 1This is a perspective view of the open-end wrench with an asymmetrical opening structure according to this utility model.

[0008] Figure 2 This is a schematic diagram of the engagement of the open-end wrench with an asymmetrical opening structure and the nut according to this utility model.

[0009] Figure 3 This is a schematic diagram of the engagement of the open-end wrench with an asymmetrical opening structure and the nut according to this utility model.

[0010] Explanation of symbols in the attached diagram:

[0011] Grip 10

[0012] Working head 20

[0013] Opening 20A

[0014] Force-bearing surface 21

[0015] Force application surface 22

[0016] First force application surface 221

[0017] Second force application surface 222

[0018] Rounded corners 23

[0019] First rounded corner 231

[0020] Second rounded corner 232

[0021] Third rounded corner 233

[0022] Fixed surface 24

[0023] First fixed surface 241

[0024] Second fixed surface 242

[0025] Let the slot 25

[0026] Card face 26

[0027] Relay plane 27

[0028] Nut 50

[0029] First width D1

[0030] Second width D2

[0031] First direction A1

[0032] Second direction A2 Detailed Implementation

[0033] This utility model provides an open-end wrench with an asymmetrical opening structure. Please refer to [reference needed]. Figures 1-3 As shown, it includes:

[0034] A handle 10 and a working head 20 are connected, with the working head 20 connected to one end of the handle 10. The working head 20 has an open opening 20A, and facing the opening 20A are a force-receiving surface 21, two force-applying surfaces 22, three rounded corner surfaces 23, two fixing surfaces 24, a plurality of grooves 25, and a locking surface 26. The force-receiving surface 21 is a plane facing the opening 20A and the two force-applying surfaces 22. The rounded corner surfaces 23 are defined as a first rounded corner surface 231, a second rounded corner surface 232, and a third rounded corner surface 233. The two fixing surfaces 24 are a first fixed surface... The device has a fixed surface 241 and a second fixed surface 242. The two force-applying surfaces 22 are a first force-applying surface 221 and a second force-applying surface 222. A first rounded corner surface 231 is provided between the first fixed surface 241 and the first force-applying surface 221. A second rounded corner surface 232 is provided between the first fixed surface 241 and the second fixed surface 242. A third rounded corner surface 233 is provided between the second fixed surface 242 and the force-receiving surface 21. At least one relief groove 25 is provided between the first force-applying surface 221 and the second force-applying surface 222. A relief groove 25 is provided between the second force-applying surface 222 and the locking surface 26.

[0035] There are two grooves 25 between the first force-applying surface 221 and the second force-applying surface 222. There is also a relay surface 27 between the two grooves 25. The relay surface 27 is located between the first force-applying surface 221 and the second force-applying surface 222. There is one groove 25 between the first force-applying surface 221 and the relay surface 27. There is one groove 25 between the second force-applying surface 222 and the relay surface 27. The first force-applying surface 221 and the second force-applying surface 222 have a first width D1. The relay surface 27 has a second width D2. The first width D1 is greater than the second width D2. The ratio of the first width D1 to the second width D2 is between 2:1 and 3:1.

[0036] In a preferred embodiment, the force-bearing surface 21 has a plurality of the grooves 25.

[0037] The above describes the structural configuration and connection relationships of this utility model in a preferred embodiment. The effects achieved by this utility model are as follows: Please refer to... Figures 2-3When the nut 50 is placed in the opening 20A, one of the two sides of the nut 50 abuts against the force-applying surface 22, and the other side abuts against the force-receiving surface 21. When the user rotates the wrench along a first direction A1, the force is applied to the nut 50 from the second force-applying surface 222 of the wrench. When the user rotates the wrench along a second direction A2, the force is applied to the nut 50 from the first force-applying surface 221 of the wrench. Therefore, the force can be transmitted to the nut 50 from the first force-applying surface 221 and the second force-applying surface 222. Since the first force-applying surface 221 and the second force-applying surface 222 have a large area, they can provide greater force strength and stronger structural strength to effectively prevent damage or breakage of the wrench.

[0038] Better yet, please refer to Figure 3 When the wrench is turned, and the nut 50 deflects slightly within the opening 20A, the tip of the nut 50 can correspond to the groove 25, and the groove 25 can hold the nut 50 which is about to come out, thereby achieving the effect of preventing the nut 50 from coming out of the opening 20A.

Claims

1. An open-end wrench having an asymmetric opening structure, characterized by, include: A handle and a working head are connected, the working head being connected to one end of the handle, wherein: the working head is provided with an opening, and a force-receiving surface, two force-applying surfaces, at least one rounded corner surface, at least one fixing surface, a plurality of grooves and a locking surface facing the opening, the force-receiving surface facing the two force-applying surfaces, the two force-applying surfaces being a first force-applying surface and a second force-applying surface, the rounded corner surface being between the fixing surface and the first force-applying surface, at least one groove being between the first force-applying surface and the second force-applying surface, and a groove being between the second force-applying surface and the locking surface; as well as The force-bearing surface has a plurality of such grooves.

2. The open-end wrench having an asymmetric opening structure according to claim 1, wherein The number of grooves between the first force-applying surface and the second force-applying surface is two, and there is also a relay surface between the two grooves. The relay surface is located between the first force-applying surface and the second force-applying surface. There is a groove between the first force-applying surface and the relay surface, and there is a groove between the second force-applying surface and the relay surface. The first force-applying surface and the second force-applying surface have a first width, and the relay surface has a second width. The first width is greater than the second width, and the ratio of the first width to the second width is between 2:1 and 3:

1.

3. The open-end wrench with asymmetric opening structure according to claim 1, wherein The number of rounded corner surfaces is three, the number of fixed surfaces is two, the rounded corner surfaces are a first rounded corner surface, a second rounded corner surface and a third rounded corner surface, the two fixed surfaces are a first fixed surface and a second fixed surface, the first fixed surface and the first force-applying surface have the first rounded corner surface, the first fixed surface and the second fixed surface have the second rounded corner surface, and the second fixed surface and the force-receiving surface have the third rounded corner surface.

4. The open-end wrench with asymmetric opening structure according to claim 1, wherein The surface subjected to force is a plane facing the opening.

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