| 摘要 |
The present invention relates to a hydraulic chuck for cutting tools. According to the present invention, a tool insertion hole is formed in a body and a hydraulic oil storage space to store a hydraulic oil is formed at a lower part of the tool insertion hole. A pressure control screw is fastened to a pressure control hole formed to be linked to the hydraulic oil storage space on an outer surface. An upper part fixing hole is comprised on an upper part of the body, and pressure of the hydraulic oil storage space is controlled by the pressure control screw, by fastening the lower part fixing hole to the hydraulic oil storage space. At the same time, an upper part of a tool is fixed by pushing the outer surface of the upper part fixing hole by an upper cover. Moreover, a lower part is pushed and fixed by a lower part fixing hole contracted by hydraulic pressure of the hydraulic oil. Thus, the upper part and the lower part of the tool are fixed in the body solidly. According to the present invention, since the upper part and the lower part of the tool are fixed by the upper and lower part fixing holes, respectively, the hydraulic chuck has solid fixing force and maintenance costs are reduced by infinite recycling of the hydraulic oil. The hydraulic chuck can fix the tool easily by a simple manipulation of fastening or releasing the pressure control screw. Since there is no friction among components, damage or breaking among the components is not caused. Since the lower part fixing hole is formed in a hydraulic structure, it is possible to maintain fixing force at the same time when indentation force increases, and thus there is no danger for the tool to be deviated, and therefore, reliability of the product can be improved. |
