US 12,233,520 B2
Bore clamp
Oliver Graulich, Laubach (DE)
Assigned to Ludwig Ehrhardt GmbH, Laubach (DE)
Appl. No. 17/296,824
Filed by Ludwig Ehrhardt GmbH, Laubach (DE)
PCT Filed Jul. 8, 2020, PCT No. PCT/EP2020/069250
§ 371(c)(1), (2) Date May 25, 2021,
PCT Pub. No. WO2021/018532, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. DE102019120427.5 (DE), filed on Jul. 29, 2019.
Prior Publication US 2022/0126421 A1, Apr. 28, 2022
Int. Cl. B25B 5/08 (2006.01)
CPC B25B 5/087 (2013.01) 27 Claims
OG exemplary drawing
 
1. A bore clamp for clamping a workpiece comprising a workpiece bore located in the workpiece, with
a) a clamping bush for engaging in the workpiece bore, the clamping bush being radially expandable,
b) a clamping bolt which extends coaxially through the clamping bush and is axially displaceable in a clamping direction between a clamping position and an unclamping position,
b1) where the clamping bolt radially expands the clamping bush in the clamping position in order to clamp the clamping bush in the workpiece bore,
b2) whereas the clamping bolt does not radially expand the clamping bush in the unclamping position so that the clamping bush can be inserted into the workpiece bore or pulled out of the workpiece bore, and
c) a clamping bolt drive for axial displacement of the clamping bolt in the clamping direction into the clamping position, wherein the clamping bolt drive comprises the following:
c1) a piston laterally displaceable with respect to the clamping direction, and
c2) a wedge gear with wedge faces sliding on one another for converting the lateral movement of the piston into a corresponding axial movement of the clamping bolt in the clamping direction.