Abstract: The invention relates to a double head drilling device for a drill rod having an outer pipe and an inner rod running at least in sections inside the outer pipe, with a first drive unit for driving the inner rod in a rotating manner and a second drive unit for driving the outer pipe in a rotating manner. According to the invention provision is made in that for the releasable clamping of the inner rod a first clamping head and a second clamping head are provided and in that the two clamping heads are supported in an axially displaceable manner with respect to each other. Furthermore, the invention also comprises a method for producing a bore with this double head drilling device.

Abstract: The invention relates to a double head drilling device for a drill rod having an outer pipe and an inner rod running at least in sections inside the outer pipe, with a first drive unit for driving the inner rod in a rotating manner and a second drive unit for driving the outer pipe in a rotating manner. According to the invention provision is made in that for the releasable clamping of the inner rod a first clamping head and a second clamping head are provided and in that the two clamping heads are supported in an axially displaceable manner with respect to each other. Furthermore, the invention also comprises a method for producing a bore with this double head drilling device.

Abstract: The invention relates to a drive device for driving a drill rod having a drive means with a rotary drive and a vibration drive for driving an output shaft in a rotating and axially vibrating manner and an adapter means which is coupled with the output shaft and comprises an outer adapter for connecting an outer rod and an inner adapter for connecting an inner rod. The outer adapter is adapted to transmit the rotational movement and the axially vibrating movement of the output shaft to the outer rod. The inner adapter is supported in an axially displaceable and spring-mounted manner in the outer adapter. The invention further relates to a method for operating a drive device.

Abstract: The invention relates to a drive device for driving a drill rod having a drive means with a rotary drive and a vibration drive for driving an output shaft in a rotating and axially vibrating manner and an adapter means which is coupled with the output shaft and comprises an outer adapter for connecting an outer rod and an inner adapter for connecting an inner rod. The outer adapter is adapted to transmit the rotational movement and the axially vibrating movement of the output shaft to the outer rod. The inner adapter is supported in an axially displaceable and spring-mounted manner in the outer adapter. The invention further relates to a method for operating a drive device.

Abstract: The invention relates to a drive device for driving a drill rod, which has an outer rod and an inner rod, with a first rotary drive unit, with which the outer rod can be driven in a rotating manner via an outer drive shaft, a second rotary drive unit, with which the inner rod can be driven in a rotating manner independently of the outer rod via an inner drive shaft, and a vibration unit for generating a vibration, which has a vibration element that can be driven in a vibrating manner. For transmission of the vibration to the outer drive shaft the vibration element is connected via a first transmission unit to the outer drive shaft and for transmission of the vibration to the inner drive shaft the vibration element is connected via a second transmission unit to the inner drive shaft.

Abstract: The invention relates to a rotary drive assembly for a drill rod having an outer tube and an inner rod extending at least in sections inside the outer tube, comprising a first gear unit having at least a first drive unit for driving the inner rod in a rotating manner and a second gear unit, which is offset to the said first gear unit in the longitudinal direction of the drill rod and has at least a second drive unit for driving the outer tube in a rotating manner. In accordance with the invention provision is made for the second drive unit to be spaced from the second gear unit and for the second drive unit to be arranged adjacent to the first drive unit on the first gear unit.

Abstract: The invention relates to a rotary drive assembly for a drill rod having an outer tube and an inner rod extending at least in sections inside the outer tube, comprising a first gear unit having at least a first drive unit for driving the inner rod in a rotating manner and a second gear unit, which is offset to the said first gear unit in the longitudinal direction of the drill rod and has at least a second drive unit for driving the outer tube in a rotating manner. In accordance with the invention provision is made for the second drive unit to be spaced from the second gear unit and for the second drive unit to be arranged adjacent to the first drive unit on the first gear unit.