JPH05269604A - Support device of rotary shaft at machine tool - Google Patents

Abstract

PURPOSE:To regulate easily and with high precision an interval between rotary shafts by means of processing precision that is possible in reality. CONSTITUTION:An outer sleeve 2 at which a hole of an eccentricity alpha is formed, and an inner sleeve 3 at which a hole of the same eccentricity alpha is formed, are equipped, and the position of a rotary shaft 4 is regulated by making the inner sleeve 3 support the rotary shaft 4 through a rolling bearing, turning the outer sleeve 2 and the inner sleeve 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft supporting device for a machine tool, and more particularly to a rotary shaft supporting device for a machine tool having a plurality of rotary shafts for facilitating adjustment of a distance between the rotary shafts. It relates to the device.

[0002]

2. Description of the Related Art In a transfer machine, multi-axis processing units at each processing station are required in view of processing speed, installation space, price, and the like.
By making the processing unit multi-axis, for example, a plurality of holes can be processed at the same time in the previous step, and the holes processed at the previous step can be simultaneously completed in the next step.

[0003]

However, the error between the arrangement interval of the rotary shafts arranged in the machining unit of the previous process and the arrangement interval of the rotary shafts arranged in the machining unit of the next process is set to within several micrometers. High-accuracy machining cannot be achieved unless they are matched with high accuracy. Therefore, processing and assembling of a processing unit that performs highly accurate processing requires processing accuracy that is almost impossible in reality.

In view of the above-mentioned circumstances, an object of the present invention is to provide a supporting device for rotating shafts, in which the distance between the rotating shafts can be adjusted easily and highly accurately with the machining accuracy that is actually possible. It is in.

[0005]

In order to achieve the above object, in the present invention, a pair of sleeves having the same eccentricity and arranged in double inside and outside are provided, and the rolling bearing is provided in the sleeve arranged inside. The rotating shaft is supported via the.

[0006]

By rotating the pair of sleeves, the axial center position of the rotary shaft is moved, and the interval between the rotary shafts is adjusted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, 1 is a casing. An outer sleeve 2 is rotatably supported by the casing 1 and has a shaft centered with a hole having an eccentricity α with respect to an outer peripheral shaft center A. Reference numeral 3 denotes an inner sleeve, which is rotatably supported by the outer sleeve 2. A hole having the same eccentricity α as the outer sleeve 2 with respect to the outer peripheral axis B is formed in the shaft center. A rotary shaft 4 is rotatably supported by the inner sleeve 3 via a rolling bearing 5.

Due to such a structure, the casing 1
After assembling the rotary shaft 4 to the, the distance between the rotary shafts 4 is measured.
Then, when the spacing needs to be adjusted, the outer sleeve 2 and the inner sleeve 3 are rotated to adjust the spacing. At this time, the axis of the rotary shaft 4 can be moved to an arbitrary position within a circle C having a radius α (amount of eccentricity) centered on the axis A of the outer circumference of the outer sleeve 2.

Therefore, even if the casing 1, the inner sleeve 2, the outer sleeve 3, the rotary shaft 4 and the rolling bearing 5 have a practically possible processing accuracy, the interval between the rotary shafts 4 can be adjusted with higher accuracy.

[0010]

As described above, according to the present invention, a pair of sleeves having the same amount of eccentricity and arranged inside and outside are provided, and the rotary shaft is mounted on the sleeves arranged inside through a rolling bearing. Since the support is provided, it is possible to easily set the interval between the rotary shafts of the multi-axis machining unit with high accuracy.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a relationship between a pair of sleeves and a rotating shaft according to the present invention.

FIG. 2 is a side sectional view showing a supporting state of a rotating shaft according to the present invention.

[Explanation of symbols]

2 ・ ・ Sleeve, 3 ・ ・ Sleeve, 4 ・ ・
Rotating shaft, 5 ・ ・ Rolling bearing, α ・ ・ Eccentricity.

Claims (1)

[Claims] 1. A work characterized in that a pair of sleeves having the same amount of eccentricity and arranged in double inside and outside are provided, and the rotating shaft is supported on the sleeves arranged inside by rolling bearings. Supporting devices for rotating shafts in machines.