Electric spindle assembly with hydraulic cylinder and center cooling function

Abstract

The invention discloses an electric spindle assembly with a hydraulic cylinder and a center cooling function. The electric spindle assembly comprises a first channel arranged on an end cover and communicating with a containing cavity, a second channel is arranged on an outer shell and communicates with the containing cavity, and a piston of the hydraulic cylinder can move along the axial direction of an inner shell by introducing hydraulic oil from the first channel or the second channel. A third channel communicates with a fourth channel, a fifth channel and a seventh channel in sequence to form a liquid inlet channel, an eighth channel communicates with a sixth channel, a ninth channel and a tenth channel in sequence to form a liquid outlet channel, and a twelfth channel communicates with the liquid outlet channel through an abutting gap between a limiting sleeve and a spacer bush; and a thirteenth channel communicates with the liquid inlet channel through a gap between a raised shaft and a top end gland. The hydraulic cylinder piston for controlling a broach device and a center cooling structure for cooling the interior of the electric spindle are combined together, so that the integrated structure is more compact, cooling liquid can enter through a single channel and exit through multiple channels, and then the cooling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electric spindles, in particular to an assembly for electric spindles with hydraulic cylinders and central cooling. Background technique [0002] In the prior art, the hydraulic device for controlling the pull rod of the electric spindle and the cooling device for the electric spindle are complex in structure, and are assembled with the electric spindle separately, which takes up a large space and is inconvenient to install; at the same time, the cooling device for the electric spindle can only cool the shell of the spindle and cannot The internal cooling of the high-speed rotating electric spindle leads to a large internal temperature rise when the electric spindle is operating at high speed, which reduces the overall performance of the spindle and shortens the service life of the electric spindle. Contents of the invention [0003] The present invention aims to solve one of the above-mentioned technic...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the hydraulic device for controlling the pull rod of the electric spindle and the cooling device for the electric spindle are complex in structure, and are assembled with the electric spindle separately, which takes up a large space and is inconvenient to install; at the same time, the cooling device for the electric spindle can only cool the shell of the spindle and cannot The internal cooling of the high-speed rotating electric spindle leads to a large internal temperature rise when the electric spindle is operating at high speed, which reduces the overall performance of the spindle and shortens the service life of the electric spindle

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