Crankshaft end connection screw hole drilling aids

Abstract

The invention discloses a drilling auxiliary tool for a crankshaft end face connecting screw hole. The tool comprises a drilling template, a circumferential positioning plate is fixed to one side of the drilling template which is a cylindrical disc part, a crankshaft fixing hole is machined in the middle portion of the drilling template, the crankshaft fixing hole and the shaft neck of the end of a crankshaft are matched in size, a drilling sleeve mounting hole is machined in the position concentric with the crankshaft fixing hole, a drilling sleeve is mounted in the drilling sleeve mounting hole, and a drilling sleeve inner hole is matched with a drill bit; a clamping mechanism mounting hole is formed in the other side of the drilling template, and in the clamping process of a clamping screw, the positioning face of a positioning sleeve and the positioning face of a clamping sleeve are in contact with the shaft neck at the end of the crankshaft. The tool is simple in structure, easy and convenient to manufacture, convenient to use and operate, long in service life and high in machining precision.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a drilling auxiliary tool. Background technique [0002] The position of the connecting screw hole on the end surface of the crankshaft is very demanding, because it is related to the working condition of the engine. Therefore, how to ensure the accuracy of the connecting screw hole machining is a very headache for those skilled in the art; existing processing aids such as Figure 10-Figure 12 As shown, the drill template 4 is included, and one side of the drill template 4 is provided with a circumferential positioning plate 1, and two screw seats 11 are welded symmetrically up and down on the right side of the drill template. Threaded hole, the clamping screw 2 passes through the light hole of the screw seat above, and is screwed into the threaded hole of the screw seat below. Install a set of drill sleeves in front of the drilling template according to the pitch circle size and angle siz...

AI Technical Summary

Problems solved by technology

[0004] The crankshaft end face of this structure is connected to the screw hole drilling aid, because the middle part of the drilling template is provided with a circumferential groove 13, and the front side of the circumferential groove is provided with an axial groove 12, the crankshaft fixing hole K is easily deformed during the use of this opening structure. , which affects the crankshaft end face connection screw hole drilling aids to be installed in the crankshaft end journal, so the service life is short; the deformation of this opening structure is irregular during the clamping process, which affects the position accuracy of the crankshaft end face connection screw hole after processing; in addition, This kind of clamping structure adopts clamping screw, which fixes the neck of the crankshaft through the drill template, and the clamping force acts on the linear direction of the clamping screw, which is a linear clamping and has cumulative error. Therefore, the structure is less accurate

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