Spanner adapted for highly worn screw nut

Abstract

The present invention provides one kind of spanner suitable for high-wear screw nut. The spanner includes one sleeve end with one positioning hole and one opened end with one clamping opening of outwards buckling plane. It features that the positioning hole in the sleeve end consists of several arced surfaces, notched tips and notched arc surfaces, and the opened end has two raised surfaces and one notched surface. It can obtain excellent fixing effect.

Description

technical field [0001] The invention relates to a wrench, in particular to a wrench suitable for high wear nuts. Background technique [0002] As we all know, the wrench has always been an indispensable tool for maintenance in daily life, and the main direction of the structural improvement of the wrench today is to make it stable and not easy to fall off when the nut is rotated. Therefore if figure 1 As shown, the plane schematic diagram of a commonly used wrench A is provided with an arc-convex surface A1 and a concave surface A2 in the fitting surface of the wrench, so that the corner edge C1 of a normal nut C can be held on the concave surface between the arc-convex surfaces A1 A2 (see figure 2 shown), but for the worn nut D, the sliding teeth will occur because the arc convex surface A1 cannot support the obtuse angle line D1 (refer to image 3 Shown), that is to cause inconvenience in use. [0003] another example Figure 4 Shown is a schematic plan view of anoth...

AI Technical Summary

Problems solved by technology

[0002] As we all know, the wrench has always been an indispensable tool for maintenance in daily life, and the main direction of the structural improvement of the wrench today is to make it stable and not easy to fall off when the nut is rotated. Therefore if figure 1 As shown, the plane schematic diagram of a commonly used wrench A is provided with an arc-convex surface A1 and a concave surface A2 in the fitting surface of the wrench, so that the corner edge C1 of a normal nut C can be held on the concave surface between the arc-convex surfaces A1 A2 (see figure 2 shown), but for the worn nut D, the sliding teeth will occur because the arc convex surface A1 cannot support the obtuse angle line D1 (refer to image 3 shown), which causes inconvenience in use

[0003] another example Figure 4 Shown is a schematic plan view of another type of conventional wrench B, which is provided with a plurality of tooth surfaces B1 in the fitting surface of the wrench, so that the corner edge C1 of a normal nut C can be supported by the tooth surfaces B1 , which can increase the friction effect (such as Figure 5 shown), but as far as the stress of a single point is concerned, it will cause the nut C to be worn to a certain extent, and after a long time of use, it will even damage the structure of the tooth surface and form a false, and for the approach Wear nut D on round face (see Image 6 shown), including phenomena that cause slippage

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