DRILLING DEVICE FOR EARTH OR ROCK DRILLING AND METHOD FOR RETROFITTING SUCH A DRILLING DEVICE

Abstract

The invention relates to a drilling device for earth or rock drilling having a mast, a drill drive with a drill drive shaft for driving a drill rod in a rotating manner, a drill drive carriage, which is supported in a movable manner along the mast and on which the drill drive is arranged, and an oscillation drive, which is designed for generating an oscillation, arranged behind the drill drive in a drilling direction and connected to the drill rod for transmitting an oscillation, wherein a rear connecting end of the drill drive shaft of the drill drive or the drill rod projects rearwards from the drill drive. According to the invention provision is made in that on the connecting end a rotary coupling with a first coupling piece, which is connected in an axially fixed and torque-proof manner to the connecting end of the drill drive shaft, and a second coupling piece, which is axially fixed and rotatable relative to the first coupling piece, is provided. Furthermore, provision is made in that the oscillation drive has a clamping means which is designed for releasably clamping the second coupling piece, wherein in the clamped state an axially fixed connection is formed between the oscillation drive and the second coupling piece.

Claims

1. Drilling device for earth or rock drilling having a mast, a drill drive with a drill drive shaft for driving a drill rod in a rotating manner, a drill drive carriage, which is supported in a movable manner along the mast and on which the drill drive is arranged, and an oscillation drive which is designed for generating an oscillation, arranged behind the drill drive in a drilling direction and connected to the drill rod for transmitting an oscillation, wherein a rear connecting end of the drill drive shaft of the drill drive or the drill rod projects rearwards from the drill drive, wherein on the connecting end a rotary coupling with a first coupling piece, which is connected in an axially fixed and torque-proof manner to the connecting end, and a second coupling piece, which is axially fixed and rotatable relative to the first coupling piece, is provided and in that the oscillation drive has a clamping means which is designed for releasably clamping the second coupling piece, wherein in the clamped state an axially fixed connection is formed between the oscillation drive and the second coupling piece.

2. Drilling device according to claim 1, wherein the clamping means has a clamping collet with radially adjustable clamping claws for the force- and/or form-locking connection.

3. Drilling device according to claim 1, wherein the oscillation drive is mounted on an oscillation drive carriage which is movable relative to the drill drive carriage.

4. Drilling device according to claim 3, wherein after release of the clamping means the oscillation drive carriage with the oscillation drive (30) can be separated and removed from the drill drive.

5. Drilling device according to claim 1, wherein the oscillation drive is designed as a vibrator.

6. Drilling device according to claim 5, wherein the vibrator has at least a pair of rotationally driven unbalanced units and/or at least one oscillating piston.

7. Drilling device according to claim 1, wherein the mast is arranged in a substantially vertical manner.

8. Drilling device according to claim 1, wherein the oscillation drive is supported in an oscillation-damping manner on the oscillation drive carriage.

9. Method for retrofitting a drilling device for earth or rock drilling, in particular according to claim 1, having a mast, a drill drive with a drill drive shaft for driving a drill rod in a rotating manner and a drill drive carriage which is supported in a movable manner along the mast and on which the drill drive is arranged, wherein on a rear connecting end of the drill drive shaft of the drill drive or the drill rod a rotary coupling with a first coupling piece, which is connected in an axially fixed and torque-proof manner to the connecting end, and a second coupling piece, which is axially fixed and rotatable relative to the first coupling piece, is provided and in that behind the drill drive an oscillation drive with a clamping means is arranged which is designed for releasably clamping the second coupling piece, wherein in the clamped state an axially fixed connection is formed between the oscillation drive and the second coupling piece.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The FIGURE is a schematic side view of the inventive drilling device.

[0030] A drilling device 10 according to the invention is shown schematically in side view in the drawing. The drilling device 10 has a drill drive 20 and an oscillation drive 30 which is arranged behind the drill drive 20 in the drilling direction. The drill drive 20 is supported on a drill drive carriage 24 and supported in a displaceable manner along a linear guide, not shown in greater detail, on a mast 12 that is illustrated in shortened form only. Correspondingly, the oscillation drive 30 is supported via an oscillation drive carriage 34 along the linear guide on the mast 12. The mast 12 is preferably arranged on a carrier vehicle not shown.

[0031] The drill drive 20 has a drill drive shaft 22 that can be connected at its front end to a drill rod not depicted. The drill drive 20 which comprises a hydraulic motor in particular generates a torque that is transmitted via the drill drive shaft 22 to the drill rod. The drill drive shaft 22 is supported in an axially displaceable manner in a housing of the drill drive 20, with a rear connecting end 26 projecting in the rearward direction. The rear connecting end 26 is connected to the drill drive shaft 22 and constitutes in particular the rear end of the drill drive shaft 22. On the rear connecting end 26 a rotary coupling 40 is mounted that has a first coupling piece and a second coupling piece, not illustrated in greater detail. The first coupling piece of the rotary coupling 40 is connected in an axially fixed and torque-proof manner to the rear connecting end 26 of the drill drive shaft 22. The second coupling piece of the rotary coupling 40 is supported by being axially fixed to the first coupling piece and rotatable relative to the first coupling piece.

[0032] The oscillation drive 30 which in particular has a vibrator with several rotationally driven unbalanced elements comprises a frontal clamping means 32 directed towards the drill drive 20. In particular, the clamping means 32 is a clamping collet with radially adjustable clamping claws 36. By way of the clamping claws 36 of the clamping means 32 the second coupling piece can be gripped in a force-locking and/or form-locking manner. In this way, a vibration or oscillation movement generated by the oscillation drive 30 and directed in the drilling direction can be transmitted to the second coupling piece and from there to the first coupling piece of the rotary coupling 40. Due to the axially fixed connection of the first coupling piece to the rear connecting end 26 of the drill drive shaft 22 this vibration or oscillation movement is transmitted from the first coupling piece to the said drill drive shaft. Thus, in the illustrated operating state a rotary movement of the drill drive shaft 22 that is generated by the drill drive 20 can be combined or superimposed with an axially directed vibration or oscillation movement, as indicated by the illustrated arrows.

[0033] Via non-depicted damping elements arranged between the housing of the oscillation drive 30 and the oscillation drive carriage 34 a direct transmission of oscillations from the oscillation drive 30 to the mast 12 can be prevented or at least reduced to a large extent. A corresponding damping can also be arranged between the housing of the drill drive 20 and the drill drive carriage 24.

[0034] If no superimposed vibration or oscillation movement is required for the drilling operation the clamping means 32 can be released. For this, the clamping claws 36 are moved radially outwards, whereby the connection to the rotary coupling 40 is released. In this released position the oscillation drive 30 can then be moved rearwards along the mast 12 via a non-depicted adjustment drive and thereby be spaced apart from the drill drive 20. Conversely, by moving drill drive 20 and oscillation drive 30 towards each other the two drives can be combined again. The unit thus formed of drill drive 20 and oscillation drive 30 can then be uniformly moved along the mast 12.

[0035] The releasable arrangement of the oscillation drive 30 renders it possible in accordance with the invention that even existing drilling devices 10 can be subsequently provided with an oscillation drive 30.