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US 12,208,533 B2Granted
Demolition robot
AssigneeBrokk Aktiebolag
InventorAnders Labba
Life of this patent
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Abstract
A demolition robot (1) comprises a robot arm (2) and a saw tool (3) having an exchangeable saw blade (5), wherein the saw tool comprises a rotatable spindle (4) with an end portion (4.1) and a saw blade comprising a hub (6), and the saw blade hub is releasably arranged on the end portion (4.1) of the spindle with a torque-transmitting connection (7), and wherein a release mechanism (30) for automatic exchange of the saw blade (5) is arranged on the robot arm.
Claims13
A demolition robot comprising a robot arm with a saw tool with an exchangeable saw blade,
- wherein the saw tool comprises a rotatable spindle with an end portion and the saw blade comprising a hub (6),
- wherein the saw blade hub is arranged on the end portion of the spindle with a torque-transmitting connection,
- wherein a release mechanism for automatic exchange of the saw blade is arranged on the robot arm,
- wherein the release mechanism comprises a remote-controllable hydraulic cylinder arranged on the robot arm and a maneuvering sleeve coupled to the hydraulic cylinder via a displaceable pulling rod arranged in the spindle, and
- wherein the torque-transmitting connection is configured as a conical connection, comprising an outer conical envelope surface associated with the hub and an inner conical clamping surface associated with the spindle,
- wherein the maneuvering sleeve is arranged to cooperate with a block (10) integrated in the spindle,
- wherein the block has a first end with a plurality of radially outwardly directed pawls arranged around the circumference, and said pawls are resilient and maneuverable in radially outward direction and configured to engage with and capture an inner conical engagement surface of the hub,
- wherein in a locking state, the maneuvering sleeve is arranged to operate the block under the influence of a tension force along the pulling rod,
- wherein the block in a locking state is arranged to releasably retain the saw blade hub, by pressing the pawls radially outwards for engagement with the engagement surface of the hub,
- wherein in a release state, the hydraulic cylinder is activated, and the maneuvering sleeve is caused to be displaced or pressed forward through the block and the saw blade hub towards the saw blade, and
- wherein under the influence of the hydraulic cylinder, the block is caused to release the hub under the influence of the maneuvering sleeve, and the saw blade hub is caused to be released from the end portion of the spindle, wherein the saw blade comes loose from the spindle.
8 more elements
Dependencies are inferred from the claim text.