Socket wrench with angle scribed lines

Abstract

The utility model relates to the technical field of hardware wrenches, in particular to a socket wrench with angle scribed lines. The socket spanner is of a cylinder structure with a through hole; the through hole in the socket spanner is a stepped through hole, namely, a square through hole matched with the adapter and a hexagonal polygonal through hole matched with the fastening bolt are formed; the socket spanner is characterized in that scribed lines are arranged on the circumference of the socket spanner in the vertical direction; the scribed lines are divided into three types: a scribed line I, a scribed line II and a scribed line III; the scribed lines I are located on diagonal extension lines of six corner angles of the socket spanner, and the scribed lines II are located on midpoint extension lines of every two adjacent scribed lines I; and the scribed line III is one sixth extension line of the two adjacent scribed lines I and II. The tool is simple and light in structure, and effectively solves the problem of the installation angle of the outer hexagon bolt and the problem of low manual operation efficiency through the refinement of the scribed lines.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware wrenches, and particularly relates to a socket wrench with angle graduations. Background Art

[0002] In the field of internal combustion engine assembly, some external hexagonal bolts are tightened by torque + angle to ensure that the bolts reach the corresponding pre-tightening force and the two fastened fasteners can achieve a reliable fastening effect. Usually, the torque required during the fastening installation is achieved by a torque wrench, while the angle is generally achieved by the "scribing method". After installing the socket, the graduations cannot be observed by the "scribing method", so the angle is not accurate enough. The angle directly affects the torque value. Angle differences will cause inconsistent actual tightening torque values, resulting in poor consistency, which in turn affects the assembly quality. In addition, after using the socket wrench, since the graduations cannot be observed, the installation efficiency is low during the actual tightening process. If a professional wrench that can display the angle is used, the usage cost is too high due to the variety of bolt types. Summary of the Utility Model

[0003] In order to more accurately achieve the tightening torque (angle) required by the technical requirements, and at the same time to conveniently observe the graduations, improve the efficiency and assembly quality, the purpose of the utility model is to provide a socket wrench with angle graduations.

[0004] The utility model adopts the following technical solutions to complete its utility model tasks:

[0005] A socket wrench with angle graduations, the socket wrench is a cylindrical structure with a through hole; the through hole inside the socket wrench is a stepped through hole, that is, a square through hole for adapter fitting and a polygonal through hole with a hexagon matching the fastening bolt; graduations are provided on the circumference in the vertical direction of the socket wrench; the graduations are divided into three types: graduation Ⅰ, graduation Ⅱ and graduation Ⅲ; the graduation Ⅰ is located on the diagonal extension line of the six edges of the socket wrench, and the graduation Ⅱ is located on the midpoint extension line of two adjacent graduation Ⅰ; the graduation Ⅲ is on the one-sixth extension line of two adjacent graduation Ⅰ and graduation Ⅱ.

[0006] Among them, the length of the graduation Ⅰ is the longest, and the length of the graduation Ⅲ is the shortest.

[0007] The interval between two adjacent graduation Ⅰ is 60°, the interval between two adjacent graduation Ⅱ is 30°, and the interval between two adjacent graduation Ⅲ is 5°.

[0008] The socket wrench with angle graduations provided by the utility model has a simple and lightweight structure. Through the refinement of the graduations, the installation angle problem of external hexagonal bolts and the problem of low manual operation efficiency are effectively solved. Brief Description of the Drawings

[0009] Figure 1 It is a schematic diagram of a socket wrench.

[0010] Figure 2 It is Figure 1 the A-A cross-sectional view of

[0011] Figure 3 It is Figure 1 the B-B cross-sectional view of

[0012] Figure 4 It is a schematic diagram of the position where the scale lines are engraved.

[0013] Figure 5 It is the developed schematic diagram of the circumferential position where the scale lines are engraved.

[0014] In the figure: 1. Socket, 21. Scale line Ⅰ, 22. Scale line Ⅱ, 23. Scale line Ⅲ. Specific implementation mode

[0015] The following combines the attached drawings and specific embodiments to elaborate on the present utility model in detail:

[0016] As Figures 1-5 shown, a socket wrench with angular scale lines, the socket wrench is a cylindrical structure with a through hole; the through hole inside the socket wrench is a stepped through hole, that is, it has a square through hole for adapter fitting and a polygonal through hole in the shape of a hexagon that matches the fastening bolt; scale lines are provided on the circumference in the vertical direction of the socket wrench; the said scale lines are divided into three types: scale line Ⅰ21, scale line Ⅱ22 and scale line Ⅲ23; the said scale line Ⅰ21 is located on the diagonal extension lines of the six edges of the socket wrench, and scale line Ⅱ22 is located on the midpoint extension line of two adjacent scale lines Ⅰ21; scale line Ⅲ23 is on the one-sixth extension line of two adjacent scale lines Ⅰ and scale line Ⅱ.

[0017] Among them, the length of scale line Ⅰ is the longest, and the length of scale line Ⅲ is the shortest.

[0018] The interval between two adjacent scale lines Ⅰ is 60°, the interval between two adjacent scale lines Ⅱ is 30°, and the interval between two adjacent scale lines Ⅲ is 5°.

[0019] Among them, since 60° is relatively frequent in daily use, it is necessary to engrave and mark the angles, "0°", "60°", "120°", "180°", "240°", "300°" at the positions of scale line Ⅰ21 respectively.

[0020] During use, place the socket wrench on the corresponding fixing bolt. During use, place the "0°" graduation line of the socket wrench directly in front, and then extend the "0°" graduation line and the bolt installation surface line appropriately. For example, if the tightening angle required is 60°, then a line can be drawn in advance on the 60° graduation line on the circumferential surface of the socket wrench, and slowly turn the socket wrench while observing during tightening. When the marked line drawn at 60° on the circumference of the socket wrench coincides with the extended line on the "0°" graduation line on the bolt installation surface, the required tightening angle is reached.

[0021] This method is convenient for observation during actual use, and at the same time has the advantages of low manufacturing cost and accurate tightening angle.

[0022] The socket wrench is a general standard part and can be designed according to relevant national standards. It is connected to a fastening bolt at the bottom and a swivel joint or extension rod at the top for use.

Claims

1. A socket wrench with angle markings, the socket wrench is a cylindrical structure with a through hole; the through hole inside the socket wrench is a stepped through hole, that is, a square through hole matched with an adapter and a hexagonal polygonal through hole matched with a fastening bolt; characterized in that: There are engraved lines on the circumference of the socket wrench in the vertical direction; the engraved lines are divided into three types: engraved line I, engraved line II and engraved line III; the engraved line I is located on the diagonal extension line of the six edges and corners of the socket wrench, the engraved line II is located on the midpoint extension line of two adjacent engraved lines I; the engraved line III is on the one-sixth extension line of two adjacent engraved lines I and II.

2. A socket wrench with angle markings as claimed in claim 1, characterized in that: Among them, the length of line Ⅰ is the longest, and the length of line Ⅲ is the shortest.

3. A socket wrench with angle markings as claimed in claim 1, characterized in that: The interval between two adjacent scale lines I is 60°, the interval between two adjacent scale lines II is 30°, and the interval between two adjacent scale lines III is 5°.

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