Actuating unit for locking a component of a construction machine

A lock actuating unit for locking a component of a construction machine, comprising:

• a retaining part configured to be fastened to the construction machine;
• a piston connected to the retaining part;
• a cylinder surrounding the piston such that a first cylinder chamber is formed on a first side of the piston and a second cylinder chamber is formed on a second side of the piston, the cylinder including a cylindrical wall having a cut-out defined in the cylindrical wall, the cut-out extending parallel to a longitudinal axis of the cylinder, the retaining part extending through the cut-out;
• a first fluid connection in fluid communication with the first cylinder chamber;
• and
• a second fluid connection in fluid communication with the second cylinder chamber;
• wherein the cylinder includes an outer cylinder part and at least a first inner cylinder part inserted into the outer cylinder part on a first side of the cut-out, and at least a second inner cylinder part inserted into the outer cylinder part on a second side of the cut-out, such that the cut-out is located between the first and second inner cylinder parts;
• and
• wherein the piston includes a first end received in the first inner cylinder part and a second end received in the second inner cylinder part.

A combination, comprising:

• a construction machine;
• and
• a lock actuating unit for locking a component of the construction machine, the lock actuating unit including:
• a retaining part fastened to the construction machine;
• a piston connected to the retaining part;
• a cylinder surrounding the piston such that a first cylinder chamber is formed on a first side of the piston and a second cylinder chamber is formed on a second side of the piston, the cylinder including a cylindrical wall having a cut-out defined in the cylindrical wall, the cut-out extending parallel to a longitudinal axis of the cylinder, the retaining part extending through the cut-out;
• a first fluid connection in fluid communication with the first cylinder chamber;
• and
• a second fluid connection in fluid communication with the second cylinder chamber;
• wherein the construction machine is a self-propelled construction machine including at least first and second components, the first and second components being movably interconnected;
• and
• wherein the lock actuating unit is operably associated with the first and second components so as to selectively lock the first and second components together.

A combination, comprising:

• a construction machine;
• and
• a lock actuating unit for locking a component of the construction machine, the lock actuating unit including:
• a retaining part configured to be fastened to the construction machine;
• a piston connected to the retaining part;
• a cylinder surrounding the piston such that a first cylinder chamber is formed on a first side of the piston and a second cylinder chamber is formed on a second side of the piston, the cylinder including a cylindrical wall having a cut-out defined in the cylindrical wall, the cut-out extending parallel to a longitudinal axis of the cylinder, the retaining part extending through the cut-out;
• a first fluid connection in fluid communication with the first cylinder chamber;
• and
• a second fluid connection in fluid communication with the second cylinder chamber;
• wherein the construction machine includes:
• a machine frame;
• a drum casing attached to the machine frame;
• a milling drum mounted to rotate about a milling drum axis, the milling drum axis being fixed relative to the machine frame;
• a scraper blade located behind the milling drum with reference to a direction of travel of the construction machine, the scraper blade including an upper blade part and a lower blade part, the lower blade part being movable in a sliding motion relative to the upper blade part, the upper blade part being pivotally mounted to pivot relative to the machine frame about a pivot axis;
• and
• a lifting actuator connected between the drum casing and the lower blade part to slide the lower blade part relative to the upper blade part between a downward extended position and an upward retracted position;
• wherein the lock actuating unit provides:
• a frame lock having a locked position wherein the upper blade part is locked relative to the machine frame, and an unlocked position wherein the upper blade part is unlocked and can pivot relative to the machine frame about the pivot axis;
• and
• a blade lock having a locked position wherein upward sliding motion of the lower blade part relative to the upper blade part is blocked so that upward force applied to the lower blade part by the lifting actuator causes the upper blade part and lower blade part to pivot together relative to the machine frame about the pivot axis.