JPH0329524B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rotating center turret with multiple tool holders and indexers.

Technical Background In rotating center turrets, it is customary to use separate drives for the tool holder and indexer. Therefore, the structure of the turret becomes complicated, and there is a high possibility of failure.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a simple drive mechanism for the tool holder and indexing part in the turret of the rotation center.

Contents of the Invention The turret of the rotation center according to the present invention includes a plurality of tool holders and an indexing part, and by moving in the axial direction, a tool holder driving gear,
or with a common and single drive by gears selectively meshing with the index drive gear,
In addition to selectively driving a plurality of tool holders, the indexing portion is also driven.

The axially movable gear is hydraulically operated.

Further, in the present invention, the axially movable gear is integral with a shaft rotatably supported inside a piston of a piston cylinder device for moving the axially movable gear in the axial direction.

Furthermore, in the turret of the present invention, the position of the indexing part relative to the fixed part is changed by selectively engaging the toothed joint, and thereby the axially movable gear and the tool holder driving gear are brought into mesh with each other. It's becoming like that.

DETAILED DESCRIPTION The illustrated embodiments will be described below, but this is not intended to limit the present invention in any way.

The illustrated turret includes a fixed part 1 and an index part 2 whose relative position with respect to the fixed part 1 is determined by engaging with a toothed joint 3. The toothed joint 3 maintains the engaged state when hydraulic pressure is applied within the chamber 4, but when the hydraulic pressure within the chamber 4 is released and hydraulic pressure is applied within the chamber 5, the index portion 2 moves to the right. The toothed joint 3 is separated and indexed as described below.

The drive shaft 6 is driven by a motor (not shown) and drives a gear 9 via gears 7 and 8. The gear 9 meshes with a gear 10 mounted on a shaft 11 integral with an axially movable gear 12 so as to be able to slide in the axial direction. said shaft 1
1 is rotatably supported inside a piston 14 of a piston-cylinder device including a cylinder 15 with a needle bearing.

When hydraulic pressure is applied to either chamber 16 or 17,
The piston 14 slides in the axial direction, and the shaft 11 and gear 12 also move in the cylinder 15 accordingly.

The indexing section 2 comprises a plurality of radial tool holders 18 and axial tool holders 19.

Each radial tool holder 18 has an internal gear 2
2 via bevel gears 21 and 20.

The axial tool holder 19 is driven by an internal gear 25 via gears 24 and 23.

The gear 12 meshes with either the internal gear 22 or 25, thereby locking the tool holder 18.
or 19. This drive is performed by applying hydraulic pressure to the chamber 16 and moving the gear 12 together with the shaft 11 to the right in the drawing.
Thereby, driving force is transmitted from the drive shaft 6 to any of the tool holders described above.

To index the turret using the drive shaft 6, the gear 12 is moved to the left in the drawing together with the shaft 11 by applying a constant hydraulic pressure to the chamber 17. mesh with.

When the toothed joint 3 is disconnected, the indexing section 2 rotates under feedback control by an encoder, but since this control method is well known, a description thereof will be omitted.

When the toothed joint 3 meshes again, the gear 12
The internal gear 22 meshes with either or 25 and drives either one of the tool holders.

Thus, according to the invention, the structure and operation of the turret is simplified, resulting in lower costs.

[Brief explanation of drawings]

The figure is an axial cross-sectional view of an embodiment of the turret of the invention. 1... Fixed part, 2... Index part, 3... Tooth joint, 4, 5... Chamber, 6... Drive shaft, 7-10...
Gear, 11... shaft, 12... gear, 13... needle bearing, 14... piston, 15...
Cylinder, 16, 17... Chamber, 18... Radial tool holder, 19... Axial tool holder, 20, 21... Bevel gear, 22... Internal gear, 23, 24... Gear, 25... Internal gear, 2
6...Gear.

Claims (1)

[Scope of Claims] 1. A rotation center turret for selectively driving one of a plurality of tool holders attached to an indexing part that can rotate around a fixed part, comprising: a drive device for performing indexing and driving; a gear connected to the drive device and movable in a direction parallel to the rotation axis of the indexing portion; and a gear that moves the movable gear between a first and a second position. operating means for moving, in a first position said movable gear engaging a drive of a tool holder to drive said holder, and in a second position disengaging from said holder to move said indexing gear; the tool holder, thereby pivoting the indexing member to selectively position another tool holder so that the movable gear returns to the first position. A turret of a rotation center, characterized in that the holder is driven by the gear and is detached from the driving part of the indexing part. 2. The turret of the rotation center according to claim 1, wherein the movable gear is hydraulically operated. 3. A movable gear is integral with a shaft rotatably supported inside the piston of a piston-cylinder device, and the piston-cylinder device moves the movable gear in a direction parallel to the axis of rotation of the indexing table. 3. A rotating center turret according to claim 1, wherein the turret is adapted to be moved in a direction.