A tool change unit includes a base and two tool arms rotatably mounted on the base and respectively located on two sides of the base. Each arm body includes a position-returning element, a gripping element, and an actuation element. The position-returning element enables the tool arm to rotate for upward and downward moving between a first position and a second position. The gripping element functions to grip a main-axle tool or a magazine tool. The tool change unit is combinable with a power unit to form a tool change device. The power unit drives the tool change unit to do rotation or rotation and upward and downward movement.

The present disclosure relates to a tool holder to receive and lock a tool taper on a tool magazine, an unlocking device to unlock a tool taper that is received and is locked in a tool holder of this type, and a tool magazine for a machine tool comprising one or more tool holders of this type and an unlocking device of this type.

A tool exchange device for tool magazine includes a base having a driving member, a pressure cylinder, a movement member pivotally connected to the base adjacent to the driving member, and a tool retrieving member disposed on the movement member. The driving member has a connection portion and a twisting portion. The pressure cylinder has a piston rod pivotally connected to the connection portion for driving the driving member. The twisting portion is removably received in a receiving portion of the movement member. With the rotation of the driving member, the twisting portion forces the movement member to move along an arc shape route, such that the movement member rotates by an angle, and the tool retrieving member sways between a vertical and horizontal positions. Therefore, the tool exchange device is driven with a lower force, and the tool retrieving tool stably sways.

A tool change unit includes a base and two tool arms rotatably mounted on the base and respectively located on two sides of the base. Each arm body includes a position-returning element, a gripping element, and an actuation element. The position-returning element enables the tool arm to rotate for upward and downward moving between a first position and a second position. The gripping element functions to grip a main-axle tool or a magazine tool. The tool change unit is combinable with a power unit to form a tool change device. The power unit drives the tool change unit to do rotation or rotation and upward and downward movement.

A tool exchange device for tool magazine includes a base having a driving member, a pressure cylinder, a movement member pivotally connected to the base adjacent to the driving member, and a tool retrieving member disposed on the movement member. The driving member has a connection portion and a twisting portion. The pressure cylinder has a piston rod pivotally connected to the connection portion for driving the driving member. The twisting portion is removably received in a receiving portion of the movement member. With the rotation of the driving member, the twisting portion forces the movement member to move along an arc shape route, such that the movement member rotates by an angle, and the tool retrieving member sways between a vertical and horizontal positions. Therefore, the tool exchange device is driven with a lower force, and the tool retrieving tool stably sways.

A tool magazine includes a magazine arm and a gripper plate. The magazine arm has a tool pot to hold a tool. The magazine arm is pivotable around a pivotal axis such that the tool pot pivots around the pivotal axis. The gripper plate has at least one gripper to hold the tool at a holding position on a circular arc track along which the tool moves when the magazine arm pivots. The at least one gripper is open in a tangent direction of the circular arc track at the holding position.

The chain magazine for holding tool'(5) for machine tool'includes a continuous chain (1) which has chain links (2) each with at least one tool holder (2a, 2b) and with which at least one sprocket (6, 7) meshes and a guide device (9-12) which has a guide element (12) that can be moved back and forth between a first and a second position, by means of which a tool holder (2a, 2b) of a chain link (2) can be turned in and turned out.

A chain link includes a base area, confined by four sides, and first to third link portions respectively on first to third sides. The first and second link portions respectively receive first and second connection elements for connecting the chain link to first and second adjacent chain links, and respectively and relatively define first and second rotational axes of adjacent first and second chain links. The third link portion receives a third connection element for connecting the chain link to a tool receptacle and defines a third rotational axis of a rotary motion of the tool receptacle in relation to the chain link. The first and second axes define a first plane, the first plane is parallel to the chain link base area, and the third axis lies outside the first plane. A tool magazine for a machine tool includes a link chain from chain links for the tool transport.

A tool pot includes a resin-made pot body and a metallic reinforcing member embedded in the pot body by insert molding. The reinforcing member is provided with a reinforcing plate embedded in a portion including a horizontal pin insertion portion in the pot body. The reinforcing plate is provided with a lightening hole so as to avoid the horizontal pin insertion portion.

A tool magazine includes at least one tool carriage movable along a circulation path. The tool holders each have tool pot sockets to which the tool pots are mountable. The tool holders are disposed pivotably about a pivot axis with respect to the at least one tool carriage. The tool pot sockets include a first and second tool pot sockets. An angle is created in a pivoting direction about the pivot axis between a first tool pot mounted to the first tool pot socket and a second tool pot mounted to the second tool pot socket. The turning device turns each of the tool holders about the pivot axis at a position on the circulation path. The tool pot stopper positions each of the tool pots and stops one of the first tool pot and the second tool pot at a pivotable location in the pivoting direction.