Abstract: The invention relates to a quick-change device (IO) having at least one locking bolt (26) and a motor drive which moves the locking bolt (26) into a locking position and an unlocking position, wherein the drive (16) has an energy connection (28a, 28b) and output means (34) interacting with the locking bolt (26), wherein the drive (16) comprises a rotary drive (30) having a motor and an output shaft (34), wherein the output shaft (34) is mechanically connected to the locking bolt (26), with the result that the locking bolt (26) is movable along an actuation axis. The invention is distinguished by the fact that the drive (16) has an attachment (20) for a shaft-hub connection, on which attachment a tool for manual actuation can be mounted, with the result that a manual actuation acts directly on the output shaft (34) and here the attachment (20) is arranged coaxially to a rotary connection (32a, 32b) of a gear shaft (32c, 32d).

Abstract: A quick-change device (12) comprising a receiving structure (22, 30) having an abutment (24, 32) having a bearing region (36), which is circular arc-shaped in section, with a housing radius (Ra) about a centre point (Ma) through which the circle centre point axis (A) extends, wherein furthermore the receiving structure (22, 30) comprises a locking bolt (26, 34) which has a planar clamping surface (38), wherein, the locking bolt (26, 34) has a movement direction (VR) which is situated in the orthogonal direction to the circle centre point axis (A), wherein the clamping surface angle (B) with the movement direction (VR), with the result that a cylindrical locking pin (16, 40) can be brought into contact between the clamping surface (38) and the bearing region (36).

Abstract: The invention relates to a quick-change device (IO) having at least one locking bolt (26) and a motor drive which moves the locking bolt (26) into a locking position and an unlocking position, wherein the drive (16) has an energy connection (28a, 28b) and output means (34) interacting with the locking bolt (26), wherein the drive (16) comprises a rotary drive (30) having a motor and an output shaft (34), wherein the output shaft (34) is mechanically connected to the locking bolt (26), with the result that the locking bolt (26) is movable along an actuation axis. The invention is distinguished by the fact that the drive (16) has an attachment (20) for a shaft-hub connection, on which attachment a tool for manual actuation can be mounted, with the result that a manual actuation acts directly on the output shaft (34) and here the attachment (20) is arranged coaxially to a rotary connection (32a, 32b) of a gear shaft (32c, 32d).

Abstract: Quick-change device (12) comprising a quick coupler (16) fastened on the driven-machine side, an adapter (16) which can be locked with the quick coupler (16) and is connected to a tool (14), and a hydraulic coupling (20) for producing a hydraulic connection between the hydraulic system on the driven machine and the hydraulics of the tool (14), wherein the hydraulic coupling (20) includes a first coupling part (20a) and a second coupling part (20b) and the two coupling parts (20a, 20b) are held relative to one another in an operating position, wherein the first coupling part (20a) and the second coupling part (20b) interact with at least mechanical retaining means (68,78,80) which are formed separately from the locking means of the quick-change device (12). The invention is distinguished by the fact that the coupling parts (20a, 20b) are held frictionally in the operating position by the mechanical retaining means (67,78, 80).

Abstract: Quick-change device (12) comprising a quick coupler (16) fastened on the driven-machine side, an adapter (16) which can be locked with the quick coupler (16) and is connected to a tool (14), and a hydraulic coupling (20) for producing a hydraulic connection between the hydraulic system on the driven machine and the hydraulics of the tool (14), wherein the hydraulic coupling (20) includes a first coupling part (20a) and a second coupling part (20b) and the two coupling parts (20a, 20b) are held relative to one another in an operating position, wherein the first coupling part (20a) and the second coupling part (20b) interact with at least mechanical retaining means (68,78,80) which are formed separately from the locking means of the quick-change device (12). The invention is distinguished by the fact that the coupling parts (20a, 20b) are held frictionally in the operating position by the mechanical retaining means (67,78, 80).

Abstract: A quick change device for earth moving vehicles for changing working implements and separably connected to the vehicle via an adaptor pivotable about a horizontal axis and provided on a jib of the earth moving machine, the adaptor having displaceably mounted coupling members rigid with the housing and with which there are on the working implements coupling members rigid with the housing, the displaceably mounted coupling members of the adaptor being locking bolts which have conical coupling surfaces and with which there are associated on the working implement coupling members which have conical surfaces and which are constructed in supporting fashion only over a range of 180.degree. with the corresponding conical surfaces of the associated coupling members of the working implement which are rigid with the housing.

Abstract: The arrangement of the digger teeth of an excavating bucket of a bucket wheel excavator is described, wherein the excavating bucket is equipped with replaceable corner, center and side teeth of identical construction and dimensions, but which are mounted with respect to the upper edge of the excavating bucket in different angular relationships. The configuration of a digger tooth for use in this arrangement is also included.