Open-end wrench with asymmetrically structured jaw opening
The open-end wrench with asymmetrically structured jaw opening addresses the issues of reduced contact area and stress concentration by using larger force-application surfaces and deflection notches, enhancing force transmission and structural strength.
Patent Information
- Application Number
- DE202025106444
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2025-12-11
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Conventional open-end wrenches with asymmetrically structured jaw openings suffer from reduced effective contact area and uneven stress distribution, leading to reduced strength and limited force input due to stress concentration.
An open-end wrench with an asymmetrically structured jaw opening featuring larger force-application surfaces and deflection notches to distribute force evenly, preventing damage and enhancing structural strength.
The design allows for greater force transmission and improved structural strength, preventing damage to the wrench while providing maximum force input.
Smart Images
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Abstract
Description
Technical field
[0001] The invention relates to an open-end wrench, in particular an open-end wrench with an asymmetrically structured jaw opening. State of the art
[0002] The jaw opening of a conventional open-end wrench is designed such that both sides of the opening are either smooth or serrated to increase friction, with the serrations being either symmetrical or asymmetrical. In an asymmetrically structured jaw opening, several arc-shaped notches are provided to avoid the corners of the nut. However, this design has some disadvantages. First, the multiple arc-shaped notches on one side result in the end faces between the notches being interrupted rather than continuous. This reduces the effective contact area between the wrench and the nut. Second, the arc-shaped notches lead to an uneven stress distribution, which easily promotes a concentration of stress during the wrench's use.Due to the stress concentration, the overall strength of the open-end wrench is reduced, and it is not possible to provide a greater force input. Object of the invention
[0003] The invention is based on the objective of creating an open-end wrench with an asymmetrically structured jaw opening, which enables the provision of maximum force transmission and avoids damage to the open-end wrench. Technical solution
[0004] This problem is solved according to the invention by an open-end wrench with an asymmetrically structured jaw opening, comprising the following: A handle and a head, wherein the handle and the head are connected to each other such that the head is connected to one end of the handle. An opening, a load-bearing surface, two force-application surfaces, at least one rounded surface, at least one fixing surface, a plurality of deflection notches, and a clamping surface are arranged on the head, wherein the load-bearing surface, the force-application surfaces, the at least one rounded surface, the at least one fixing surface, the deflection notches, and the clamping surface are directed towards the opening. The load-bearing surface faces the two force-application surfaces. The two force-application surfaces are a first force-application surface and a second force-application surface. The rounded surface is arranged between the fixing surface and the first force-application surface. At least one of the deflection notches is arranged between the first force-application surface and the second force-application surface.One of the deflection notches is arranged between the second force application surface and the clamping surface.
[0005] When the nut is positioned in the opening, one of its two corresponding sides rests against the force application surface, while the other side rests against the loaded surface. When the user turns the wrench in a first direction, the force is exerted on the nut from the second force application surface of the wrench. When the user turns the wrench in a second direction, the force is exerted on the nut from the first force application surface of the wrench. Thus, the force can be transmitted to the nut from both the first and second force application surfaces. Compared to conventional wrenches, the first and second force application surfaces have larger areas, allowing the wrench according to the invention to provide greater force transmission and greater structural strength, effectively preventing damage to the wrench. Brief description of the drawings Fig. Figure 1 shows a perspective view of an open-end wrench according to the invention with an asymmetrically structured jaw opening. Fig. Figure 2 shows a schematic representation of the interaction of the open-end wrench according to the invention with a nut. Fig. Figure 3 shows a schematic representation of the interaction of the open-end wrench according to the invention with a nut. Detailed description of a preferred embodiment
[0006] The following section will explain in more detail the tasks, features, and advantages of the present invention with reference to a detailed description of an exemplary embodiment and the accompanying drawings. However, the invention is not limited to the description of this exemplary embodiment and its illustration in the accompanying drawings.
[0007] In Fig. 1 to Fig. Figure 3 shows an open-end wrench according to the invention with an asymmetrically structured jaw opening, comprising the following: A handle 10 and a head 20, wherein the handle 10 and the head 20 are connected to each other such that the head 20 is connected to one end of the handle 10. On the head 20 are arranged an opening 20A, a loaded surface 21, two force application surfaces 22, three rounded surfaces 23, two fixing surfaces 24, a plurality of deflection notches 25, and a clamping surface 26, wherein the loaded surface 21, the force application surfaces 22, the rounded surfaces 23, the fixing surfaces 24, the deflection notches 25, and the clamping surface 26 are directed towards the opening 20A. The loaded surface 21 is a plane directed towards the opening 20A, with the loaded surface 21 facing the two force application surfaces 22. The three rounded surfaces 23 are defined as first, second and third rounded surfaces 231, 232, 233, respectively. The two fixing surfaces 24 are defined as first and second fixing surfaces 241, 242, respectively.The two force application surfaces 22 are defined as first and second force application surfaces 221 and 222, respectively. The first rounded surface 231 is arranged between the first fixing surface 241 and the first force application surface 221. The second rounded surface 232 is arranged between the first fixing surface 241 and the second fixing surface 242. The third rounded surface 233 is arranged between the second fixing surface 242 and the loaded surface 21. At least one of the deflection notches 25 is arranged between the first force application surface 221 and the second force application surface 222. One of the deflection notches 25 is arranged between the second force application surface 222 and the clamping surface 26.
[0008] According to the invention, there are two deflection notches 25 between the first and second force application surfaces 221, 222. Furthermore, the head 20 has a transition surface 27, which serves as a transition point between the two deflection notches 25 and is located between the first and second force application surfaces 221, 222. One deflection notch 25 is provided between the first force application surface 221 and the transition surface 27. One deflection notch 25 is provided between the second force application surface 222 and the transition surface 27. The first and second force application surfaces 221, 222 have a first width D1, and the transition surface 27 has a second width D2, wherein the first width D1 is larger than the second width D2, and the ratio of the first width D1 to the second width D2 is between 2:1 and 3:1.
[0009] In a preferred embodiment, the loaded surface 21 has a plurality of the deflection notches 25.
[0010] The open-end wrench according to the invention with an asymmetrically structured jaw opening is characterized by the following. Reference is made to Fig. 2 and Fig. 3. When the open-end wrench is positioned on a nut 50 such that the nut 50 is gripped by the wrench in the opening 20 A, one of the two corresponding sides of the nut 50 rests against the force application surface 22, while the other side of the nut 50 rests against the loaded surface 21. When the user turns the open-end wrench in a first direction A1, the force is exerted on the nut 50 from the second force application surface 222 of the open-end wrench. When the user turns the open-end wrench in a second direction A2, the force is exerted on the nut 50 from the first force application surface 221 of the open-end wrench. In this way, the force can be transmitted to the nut 50 from both the first and second force application surfaces 221, 222.In comparison to conventional open-end wrenches, the first and second force application surfaces 221, 222 have larger areas, through which the open-end wrench according to the invention can provide a greater force application and has greater structural strength, so that damage to the open-end wrench is effectively avoided.
[0011] For a further preferred embodiment, reference is made to Fig. 3. If, when the open-end wrench is turned in the opening 20A, the nut 50 deviates slightly such that the pointed corners of the nut 50 correspond to the deflection notches 25, the nut 50, which is about to fall out, can be clamped by the deflection notches 25. This prevents the nut 50 from falling out of the opening 20A.
[0012] Although the present invention has been described in detail with reference to one embodiment, it is obvious to those skilled in the art that the invention is not limited to this embodiment, but rather that modifications are possible such that individual features can be omitted or different combinations of features can be implemented without exceeding the scope of protection of the appended claims. The disclosure of the present invention includes all combinations of the individual features presented.
Claims
[1] Open-end wrench with an asymmetrically structured jaw opening comprising a handle (10) and a head (20), wherein the handle (10) and the head (20) are connected to each other such that the head (20) is connected to one end of the handle (10). characterized by, that on the head (20) an opening (20A), a loaded surface (21), two force application surfaces (22), at least one rounded surface (23), at least one fixing surface (24), a plurality of avoidance notches (25) and a clamping surface (26) are arranged, wherein the loaded surface (21), the force application surfaces (22), the at least one rounded surface (23), the at least one fixing surface (24), the avoidance notches (25) and the clamping surface (26) are directed towards the opening (20A), wherein the loaded surface (21) faces the two force application surfaces (22), wherein the two force application surfaces (22) are a first force application surface (221) and a second force application surface.(222) wherein the rounded surface (23) is arranged between the fixing surface (24) and the first force application surface (221), wherein at least one of the avoidance notches (25) is arranged between the first force application surface (221) and the second force application surface (222), wherein one of the avoidance notches (25) is arranged between the second force application surface (222) and the clamping surface (26); and that the loaded surface (21) has a plurality of the avoidance notches (25). [2] Open-end wrench according to claim 1, characterized by, that the number of avoidance notches (25) between the first and the second force application surfaces (221, 222) is two, wherein the head (20) has a transition surface (27) which serves as a transition point between the two avoidance notches (25) and is located between the first and the second force application surfaces (221, 222), wherein one of the avoidance notches (25) is provided between the first force application surface (221) and the transition surface (27), and wherein one of the avoidance notches (25) is provided between the second force application surface (222) and the transition surface (27), wherein the first and the second force application surfaces (221, 222) have a first width (D1) and the transition surface (27) has a second width (D2), wherein the first width (D1) is larger than the second width (D2), and the ratio of the first width (D1) to the second width (D2) is The score is between 2:1 and 3:
1. [3] Open-end wrench according to claim 1, characterized by, that the number of rounded surfaces (23) is three and the number of fixing surfaces (24) is two, wherein the rounded surfaces (23) are a first rounded surface (231), a second rounded surface (232) and a third rounded surface (233) and the fixing surfaces (24) are a first fixing surface (241) and a second fixing surface (24), wherein the rounded surface (231) is located between the first fixing surface (241) and the first force application surface (221), the second rounded surface (232) is located between the first fixing surface (241) and the second fixing surface (242) and the third rounded surface (233) is located between the second fixing surface (242) and the loaded surface (21). [4] Open-end wrench according to claim 1, characterized by , that the loaded area (21) is a plane directed towards the opening (20A).