Drilling tool and cam spanner for assembling and disassembling same

Abstract

The invention discloses a drilling tool. The drilling tool comprises a drill tip component and a clamping component, wherein the centre of the bottom of the drill tip component is provided with a fixed boss; the centre of the top of the clamping component is provided with a fixed seat which can clamp the fixed boss through elastic deformation; the clamping component is provided with two slots which can elastically expand the fixed seat; the two slots are parallel to each other and are symmetrically formed on the two sides of a central axis of the tool; a central table is formed between the two slots of the clamping component; the slots extend to the two sides opposite to a slot wall of the central table; and the extended parts of the slot wall form torque acting surfaces. The drilling tool has the advantages of simple structure, easy and convenient assembling and disassembling process, no wearing and durability. The invention also discloses a cam spanner for assembling and disassembling the drilling tool. The cam spanner comprises a cam part and a handle part, wherein one end of the cam part is connected with the handle part, and the other end of the cam part is provided with a guide post matched with a spanner guide hole on the drilling tool.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a drilling tool and a cam wrench used for loading and unloading the tool. Background technique [0002] In the drilling process, the cutting part of the drilling tool participates in the cutting. In order to prolong the service life of the cutting part, the cutting part is usually made of more expensive cemented carbide or similar materials, because such materials have high hardness and wear resistance. Good characteristics, so processing is extremely difficult, which makes the material cost and processing cost of drilling tools higher. At present, the commonly used drilling tools are generally assembled by cutting parts and clamping parts. The cutting parts are made of hard alloy or similar materials with high hardness and strong wear resistance, while the clamping parts are made of large Made of elastic material, the cutting parts can be replaced separately when the cutting parts are worn, w...

AI Technical Summary

Problems solved by technology

The tool transmits torque through the active surface of the coupling in a slit of the main body of the sheath to deflect the elastic protrusions. In the actual cutting process, we found that it has the following problems: 1. Due to the large radial area of ​​the elastic protrusions , when loading and unloading the cutting part, the dismounting tool bears a large force, and the dismounting tool has a small stress area, and the dismounting tool and the main body of the sheath are easily damaged by indentation, which reduces the service life of the tool, and when loading and unloading the cutting part , the opening angle that can be reached by the elastic protrusion is too small, the cutting part slides along the dovetail tenon groove of the main body of the sheath, friction between the two is inevitable, and the main body of the sheath is generally made of a material with relatively poor wear resistance , often after several loading and unloading, the dovetail tenon groove on the main body of the sheath is severely worn, and the main body of the sheath will not be able to form a reliable clamping of the cutting parts without external force, resulting in failure of the main body of the sheath; 2. The main body of the sheath The cutting parts are positioned through the dovetail structure parallel to each other. When the cutting parts are subjected to a force parallel to the dovetail structure, it is easy to cause the cutting parts to fall off; 3. Through the circular groove in the center of the dovetail structure, the cutting parts and the sheath body Centering, the diameter of the circular groove is limited by the dovetail structure, and at most it can only reach the same width as the bottom of the dovetail structure, so the centering effect that the circular groove can achieve is limited

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