An automatic shifting vertical drilling machine

Abstract

The invention relates to an automatic shifting vertical drilling machine, which comprises a bed, a column and a spindle box at the upper end of the column, and a workbench opposite to the spindle box is arranged on the lower side of the spindle box; a power transmission device is installed in the spindle box The spline shaft, the spline shaft transmits power through the input shaft to the output shaft according to the speed ratio and power demand; a low-speed gear and a high-speed gear are arranged in the middle part of the spline shaft, and the high-speed gear is fixed on the low-speed gear. Spacer sleeves are installed on the outside of the hub of the low-speed gear between them. The automatic shift mechanism of the present invention is driven by the cylinder for the shift fork, and the shift fork drives the gear connected to it to move up and down to achieve the purpose of switching the speed ratio; and the automatic shift mechanism of the present invention includes a shift fork, a shift fork shaft and The connecting rod and the shift fork move on the shift fork shaft, and the two ends of the shift fork shaft are fixed. During the movement of the shift fork, there will be no offset and deflection, and the speed ratio can be switched quickly and accurately.

Description

technical field [0001] The invention relates to the technical field of drilling machines, in particular to an automatic shifting vertical drilling machine. Background technique [0002] The existing vertical drilling machine spindle box mainly adopts the structure of manual gear shifting. Generally, high-speed and low-torque are used when processing small holes or milling, and low-speed and high-torque are used when processing large holes. This structure leads to the need to stop the spindle first when processing small holes or switching between milling and large holes, and then manually pull the switch. Shift the handle to a suitable gear, which will inevitably increase the processing time and labor cost of the parts, and cannot be automated. [0003] Chinese Patent Publication No.: 204470656U discloses an automatic gear shifting structure for a vertical CNC drilling machine spindle, including a spline shaft and a drive cylinder, on which a low-speed gear, a high-speed gea...

AI Technical Summary

Problems solved by technology

[0004] In the above technical solution, the cylinder directly drives the shift fork, and the shift fork is detachably connected with the spacer. During the movement of the fork, uneven force is likely to occur, and the moving track of the fork is difficult to control as a linear motion. When the gear moves, it is easy to generate radial force on the spline shaft, causing the spline shaft to bend and deform, making it difficult to shift gears accurately, reducing processing efficiency and affecting processing accuracy

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