JPS609603A - Guide mechanism of main shaft sleeve - Google Patents

Abstract

PURPOSE:To improve accuracy and durability by receiving turning force of a main shaft sleeve with the guide rail of a main shaft head through linear bearings. CONSTITUTION:Three side faces, two of which are in two directions for preventing turning of a main shaft sleeve 3 of a nut member screwing with a feed screw of the sleeve 3 and one of which is in one direction for preventing back falling-down, are supported by a rail 17 provided on a main shaft head 1 through linear bearing 10, 13 and 18. Therefore, the main shaft sleeve can be used for a long time with correct accuracy without disabling guide by striking on the main shaft head portion which is held by a key, and back falling-down is avoided by the holding rail of the main shaft sleeve, and stable accuracy can be secured without difference in machining accuracy in upper and lower positions of the main shaft sleeve.

Description

TECHNICAL FIELD The present invention relates to an improvement in a guide mechanism for a spindle sleeve of a vertical machining center, a vertical boring machine, etc.

Prior Art In conventional spindle sleeves, a key fixed in the axial direction of the sleeve is guided by the spindle head. Even with this structure, there is no problem under normal usage conditions.

However, in order to expand machining capacity, angular attachments are often attached to the spindle for machining, and when machining the sides of a workpiece by feeding the workpiece in a direction inclined to the tool axis using a horizontal spindle tool, the spindle sleeve After several years of use, the keyhole in the spindle head wears out, creating a gap that prevents correct guidance from being struck by the key. Furthermore, due to the influence of the oil film that lubricates the tile, when the tile is lowered, it falls backwards, which causes problems in terms of machining accuracy.

OBJECTS Accordingly, it is an object of the present invention to provide a guide mechanism for a spindle sleeve that does not impede accuracy even after many years of use.

Solution The present invention provides a nut member that is threadedly engaged with the feed screw of the spindle sleeve, and has two directions for preventing the sleeve from turning and one direction for preventing the sleeve from falling backward. I supported it.

Example Embodiments of the present invention will be described below based on the drawings.

A spindle sleeve 3, which supports a spindle 2 rotatably in the vertical direction on a spindle head 1 of a vertical boring machine, is slidably supported in the axial direction. A part of the outer periphery of this spindle sleeve 3 is machined in the axial direction by a plane 1i3a, and a window 1 is also cut on the JE shaft head 1 side by the width of the plane 6a over the axis of movement 1jii of the spindle.
a) is formed. The main shaft sleeve 6σ is inserted into this window 1a, and the key 4 is attached to the main shaft sleeve 6σ. Insert the female screw 5 of this key 4 into the internal H♂ position of the key 4, position it in the axial direction at the head 1 of the main 1q, and rotate the IEJ function a, :: lI'
It is screwed together with the ltl 7# ball screw 7.
Figure yl< L/ jZ yJ driven by L/seebo motor? The main shaft sleeve free force N-)41 is measured by turning the 4ζ-le female thread 5 with the screw 7. 1d located on the 1st side of the II'il 'Jt' of the female thread pick-up/Nj' body 6 and facing the key 4 and m6az6b.
, '7i 11jj 6 Guide surface Q parallel to a, 6b
a', 9a, and a long guide 1) for the moving axis 1 of the main l1iI+S1J-pro. And this parallel ■jj6E'
Between 8a and 8a are several linear bearings 10 and 6, which are arranged so that they move.
The jib 11 is attached to the end surface 6 of the mounting body 6.
It is inserted between A and I fair bearing 10, and the jib W is aligned. Female thread mounting body 6 on the same 4fr
Several linear bearings 13 are arranged in a line between the side surface 6b of the guide rail 9 and the guide surface 9a of the guide rail 9, and are interposed so as to move together with the female threaded mounting body 6, and the jib 14 is inserted into the back side of the linear bearing 16. It is adjusted by the jib adjustment screw 15 so that there is no 1fti ItJ, +.

Jibs 11 and 14 are balanced by alternately measuring +pji.

A guide rail 16 is attached to the side u'n of the Mewaji mounting body 6, with a guide surface 16a parallel to the housing axis and facing outward.

A guide surface 17a facing 'A1 is parallel to this guide 17ji 16a, and the movement i+(++
The L-shaped presser rail 17, which is longer than the female circumference, is the main part 1l-1III.
j[J(゛(attached to 11, guide surface 16a11
7a, a linear bearing link 18 is installed in a line so that several pieces move together with the female screw thread 6, and the guide surface 19 of the linear bearing 18 and the guide surface 1oa. A countersink 22 supported by a pin 21 is provided between the two to adjust the gap. Furthermore, a dog 20 is attached to the female screw remover body and the main body is
A limit switch LSi for eyes and a limit switch LS2 for lower limit provided on each horse 1 are operated respectively.

In this way, I Qing 1'+! 2. Attach an angular attachment with a horizontal main axis to the main 11i111 sleeve 3.
If you give a feed with ゛ and the force is 11, the main 'f'! It
The turning force i fifilI is applied to the sleeve 3, and the force is applied to the key 4 through the linear bearing 10. It is held by the guide rail 8.9. The spindle sleeve is raised in accordance with the machining position, but the Mewaji mounting body 6 is backed up by the guide rail 8.9 over its range of movement. Therefore, it can fully absorb the turning force in any vertical fence.Also, as the main side 1 sleeve 6 moves down, the sleeve 1iNf Sae's oil) will be slightly tilted by 4 degrees due to the shadow of the grind. force 1 rail 17
is received via the linear bear link °18.

As mentioned above, in the present invention, the turning force of the spindle sleeve is received by the key. It can be used for many years at the correct t+'1FL without causing damage to the spindle head I'J.

Tf/ko main i; ql + r instep of sleeve: 'y sire. 1-Fijjkeno'2, so 122 collapse is gone, and the processing that invites the upper F crying (to) of the main ^ros sleeve.
It has the feature of being able to ensure stable treetop disease without any degree of J-I.

41-1 page 17i'', L't'v explanation No. 11X+ is plan 1. −． FIG. 2 is a concave side view showing the I guide and the female threaded mounting body, and is a section taken along A-Ai in FIG. 1.

1 Main/1lll I sum 6 Main shaft sleeve 4 Key 5 Ball female thread 6 Female thread take-off body 7 Ball screw 8.9
Guide 10.13.18 Linear puffer fish 1st presser rail Figure 1 Figure Z

Claims (1)

[Claims] (1) Preventing the rotation of the main shaft sleeve of the feed screw nut member that moves the main shaft sleeve of the machine tool in the axial direction2
A guide mechanism for a spindle sleeve, characterized in that six sides in the direction and in the direction to prevent the spindle sleeve from falling over are supported by respective rails provided in the axial direction on the spindle head via linear bearings.