CZ302304B6 - Swinging spindle positioning and braking device - Google Patents

Abstract

In the present invention, there is disclosed a swinging spindle (4) positioning and braking device with a swing extent from 0 to 360 degrees consisting of a stationary fork (1) with a cavity (11) and fork (1) arms (16, 16') wherein the swinging spindle (4) is mounted through the mediation of rotary bushes (5, 5') fixedly coupled with a swinging spindle (4) supporting body (10) and plain-collar bearings (6, 6') fixedly coupled with the arms (16, 16') between the fork arms (16, 16'). A first brake unit (15) consisting of a first solid flange (7) coupled with the stationary fork (1) by screws (18) and a stationary part (d) of a drive (12) being coupled with the first solid flange (7) are arranged in mirror-like manner relative to the axis (o) of the swinging spindle (1) in the fork (1) arms (16, 16').

Description

Pivoting spindle positioning and braking device

Technical field

The invention relates to a positioning and braking device of a pivoted spindle of horizontal and vertical machine tools providing for braking the spindle to a pre-programmed position in the range of 0 to 360 ° in an axis perpendicular to the spindle axis.

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BACKGROUND OF THE INVENTION

Horizontal and vertical machine tools in which a fork with a swinging spindle is used are known to date with a worm wheel and a worm, a bevel or hynoid gearing or a hollow motor.

A disadvantage of these hitherto used configurations is the play between the gearing, which causes the spindle to vibrate and thus does not allow the spindle to be used for roughing as well as for finishing operations and for machining of speed machining technologies.

Furthermore, these clearances do not allow precise positioning of the spindle to the programmed position.

It is also known to use a braking device in braking a pivoting spindle against a fixed fork, and the accuracy of the braking is ensured by a spring which, however, eventually becomes fatigue, thereby reducing the braking force and spindle displacement from the set position and subsequent inaccuracies.

The prior art designs do not allow the required surface finish of the workpieces to be achieved, as the play causes unwanted tooling of the tool, resulting in an inadmissible trace on the finished workpiece surface.

SUMMARY OF THE INVENTION

These disadvantages are overcome by the pivoting spindle positioning and braking device with a spindle oscillation in the range of 0 to 360 ° consisting of a rigid fork with a cavity and fork arms between which it is fixedly connected to the pivoting spindle support body and support bearings fixed to the fork arms a first braking unit consisting of a first fixed flange connected to a fixed fork bolt and a singular part of the drive which is connected to the first fixed flange when the rotatable part of the drive is connected via a coupling with a shaft that rotates the spindle support body and a second braking unit consisting of a second fixed flange connected to a fixed fork bolts and a flange to which a transducer is fixed which is fixed to a second fixed The first and second braking units each comprise rotatable sleeves, annular hydraulic pistons abutting on the outer faces of the braking elements between the inner surface of the rotary sleeve and the outer face of the cylindrical shoulder of the first and second fixed flanges.

An advantage of the pivoting spindle positioning and braking device of the invention is that the first and second braking units and the pivoting spindle support body are rotatably connected.

- 1 GB 302304 B6

BRIEF DESCRIPTION OF THE DRAWINGS

The pivoting spindle positioning and braking device with spindle pivoting according to the invention is shown in the accompanying drawings, in which Fig. 1 shows a longitudinal section of the positioning and braking device.

FIG. 2 shows a longitudinal section of the first braking unit.

Fig. 3 shows a second braking unit in longitudinal section.

DETAILED DESCRIPTION OF THE INVENTION

Pivot spindle positioning and braking device 4 with a swivel range from 0 to 360 ° consisting of a fixed fork 1 with a cavity 11 and a fork arm 16,16 'between which it is fixedly connected to the pivoting spindle support body 10 by means of rotary bushings 5, 5' 4 and supporting bearings 6, 6 'rigidly coupled to the arms 16, 16' of the fork 1 are supported by the pivoting spindle 4 when the arms 16, 16 'of the fork 1 are arranged opposite each other mirror-axis relative to the axis o of the pivoting spindle 4 a fixed flange 7 connected to the fixed fork 1 by screws 18 and further from a fixed part d of the drive 12 which is connected to the first fixed flange 7 when the rotatable part f of the drive 12 is connected via a coupling 20 to the shaft 19 a second braking unit 15 'consisting of a second fixed flange 7' connected to a fixed fork 1 by screws 18 'and further a flange 17' to which it is attached The transducer 13 is rigidly connected to the second fixed flange 7 ', the first and second braking units 15, 15' each comprising rotatable sleeves 5, 5 ', wherein between the inner surface a, a' of the rotatable sleeve 5, 5 'and the outer The cylindrical shoulder c, c 'of the first and second fixed flanges 7, 7' are provided with annular hydraulic pistons 8, 8 'and 9, 9', abutting on their braking surfaces y, y 'and z, z' elements 2, 2 'and 3, 3'.

The pivoting spindle positioning and braking device is arranged such that the first and second braking units 15, 15 'and the pivoting spindle support body 4 are rotatably connected.

Industrial applicability

The pivoting spindle positioning and braking device according to the invention can be used in horizontal and vertical machine tools intended for both roughing and finishing of parts.

Claims (2)

Pivot spindle positioning and braking device (4) with a pivot range from 0 to 360 °, consisting of a fixed fork (1) with a cavity (11) and fork arms (16, 16 '), between which is rotatable sleeves (5, 5 ') fixedly coupled to the support body (10) of the pivoting spindle (4) and the supporting bearings (6, 6') rigidly connected to the arms (16, 16 ') of the fork (1) supported by the pivoting spindle (4), characterized in that, in the arms (16, 16 ') of the fork (1), a first braking unit (15) consisting of a first fixed flange (7) coupled to the fixed fork (1) is arranged opposite each other mirror -ically to the axis (o) of the pivoting spindle (4). 1) screws (18) and further from a fixed part (d) of the drive (12) which is connected to the first fixed flange (7) when the rotary part (f) of the drive (12) is connected via a coupling (20) to the shaft ( 19) which rotates the spindle support body (10) and the second braking unit (15 ') consisting of a second fixed flange (7') with fixed fork (1) screws (18 ') And a flange (17 ') on which a transducer (13) is fixed which is fixedly connected to the second fixed flange (7'), the first and second braking units (15, 15) each comprising rotatable bushings. (5, 5), wherein between the inner surface (a, a) of the rotary bush (5, 5) and the outer surface (b, b) of the cylindrical shoulder (c, c ') of the first and second fixed flanges (7, 7') annular hydraulic pistons (8, 8 ') and (9, 9), with their outer faces (y, y) and (z, z) abutting the brake elements (2, 2') and (3, 3 ') . Pivot spindle positioning and braking device according to claim 1, characterized in that the first and second braking units (15, 15) and the pivot spindle support body (10) are also rotatably connected.