CS267916B1 - Threading tool holder - Google Patents

Abstract

The threading tool holder consists of a fixed part, in which the extendable part is inserted with its shank, as well as an axial compression spring. There are driving pins between the fixed part and the extendable part. The problem to be solved is to improve the functional properties of the holder without significantly increasing its own manufacturing complexity. This is achieved by arranging a first axial bearing on the shank, resting on the inner wall of the fixed part, and a second axial bearing, resting on a stop ring at the free end of the shank, with a compression spring between both bearings.

Description

CS 267 916 B1

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threading tool holder consisting of a fixed part, with a shank disposed therein, as well as an axial compression spring, wherein the solid part and the pull-out part are driving pins.

According to the prior art, the threading tool holder of the above-mentioned type is designed so that the shank of the withdrawable part is loosely inserted into the continuous axial opening in the fixed part of the holder. In such an embodiment, the holder can only be used to manually actuate the threading machine, also only in the horizontal position, falls in the position when the insert is facing upwards.

This advantage is eliminated by the threading tool holder according to the invention, in that the bearing is supported first on the cylindrical shank of the telescopic part of the holder, supported by the inner wall of the fixed part and the second axially bearing, supported by the stop ring at the free end of the shank. the two bearings are a compression spring, preferably one whose winding is opposite to that of the pitch of the cut thread. An advantage of the threading tool holder according to the invention is that in the case of slight technical adaptation, the area of application of the holder also extends to the machine control of the operation of the threading device, irrespective of the axial orientation of the threading tool, and the driving collar is easier to bring back into focus, which is particularly advantageous in manual operation , which reduces the pinch pressure of the pinch pins and increases their lifetime.

Two examples of embodiments of a threading tool holder according to the invention are shown in the drawing, in which: Fig. 1 shows an axial sectional view of an alternative of a holder, in which its fixed part is slid from the outside on a clamping part, either a rotatable threading or a herring carrier, fig. an alternative of the holder in which the fixed part is inserted from the inside into a similar clamping part.

The threading tool holder consists of a fixed part 6, a sliding part 2 and a spring element 5 in the fixed part 7. With its shank 4, the telescopic part 2 is arranged between the fixed part 11 and the first part 5. which, in the case of a manual control, are part of the fixed part 6 and the withdrawable part 2, and for the machine control, a half number of pins 5 are sufficient, which are either part of the fixed part 6 and engage with their free end into the openings of the extension part 2 or vice versa. On the cylindrical shank 4, it is slidably mounted first. a spherical axial bearing 6, supported on the inner wall T_ of the fixed part 6, such as a second ball axially bearing 0, supported on the stop ring 6 at the free end of the shank 5. Between the two bearings 6, 6 there is a compression spring 6 whose winding is opposite is the sense of the thread being cut. The pull-out part 2 of the holder is provided with already covered (Fig. 1) or open (Fig. 2) quick release holding mechanism 10 of the tool, in the case of the threading 11, respectively. the pull-out part 2 is suddenly rotated relative to the fixed part 6 or the fixed part 6 in the sliding part 2. This springing is not prevented by the compression spring 6, which is positioned between the axial thrust bearings 8, 8. At a subsequent reversing of the speed, the driving pins 6 are brought into engagement again at the time of zero mutual revolutions by the combined effect of the compression spring 3 and the human load. The spring 6 prevents repeated microwaves and thus protects the pins 6 from excessive bruising and increases their life. Another effect of the spring 8 is that it places the tool in the wrong position, even if its orientation is down, for example when used with stand drills. In the alternative of threading machine control, the spring 6 has its primary function of compensating for the pitch difference of the firing cartridge relative to the threading tool, in spite of the axial extent of engagement of the drive pins 6 in the interlocking holes. The engagement of the pins is in this case only a secondary function of the spring £ only in exceptional circumstances when, in the event of a failure of the reversing control system,

Claims (2)

2 CS 267 916 B1, i.e. when the fixed part 1 starts to rotate relative to the extension part 2. For this case, bearings 42, EL are also used. The threading tool holder is particularly advantageous in connection with the tool quick release mechanism 10 and is supposed to be used not only in turret lathes, but also, for example, in upright drills. The bracket is used wherever the pins 2 are routed out of engagement when reversing the revolutions, or where it can be assumed in emergency situations. OBJECT OF THE INVENTION A threading tool holder, comprising a fixed part, in which the extensible part is mounted, as well as of the uxial compression spring, where the driving die is a driving element, characterized in that it is arranged on the shank (4) the first axial bearing (6), abut against the inner wall (7) of the fixed part (1) and the second axial bearing (8) supported against the stop ring (9) at the free end of the shank (4), between the two bearings ( 6, 8) is a compression spring (5). 1 drawing