Tool change unit and tool change device including same

A tool change device, at least comprising a tool change unit and a power unit,

• wherein the tool change unit at least comprises:
• a base and two tool arms rotatably mounted on the base, each of the tool arms being located on a respective one of two opposite sides of the base, the base comprising a coupling section coupled to the power unit so that the power unit is configured to rotate the base about a first axis, each of the tool arms comprising a respective arm body, a respective position-returning element, a respective gripping element, and a respective actuation element;
• wherein the base comprises a U-shaped both having a top wall and two sidewalls, each sidewall extending downwards from a respective one of two sides of the top wall;
• wherein each of the arm bodies has one end forming a respective pivoting end pivotally coupled to the base via a respective axle bar that penetrates both of the two sidewalls, such that each of the arm bodies is pivotable relative to the base about a respective further axis, and each of the arm bodies has a respective opposite end opposite the corresponding pivoting end and forming a respective gripping end that is provided with a respective gripping element;
• wherein each of the position-returning elements is arranged between the corresponding arm body and the base so as to connect the corresponding arm body and the base, so that by means of the arrangement of the corresponding position-returning element, each of the arm bodies is rotatable about the corresponding further axis upwards and downwards between a first position and a second position;
• wherein each of the gripping elements is formed with a respective opening for gripping and holding a respective tool bar;
• wherein each of the actuation elements is mounted on a respective one of the arm bodies and is adapted to be driven by a main tool axle to cause the corresponding arm body to rotate downwards;
• and
• wherein the power unit at least comprises a rotational axle that is drivable to rotate, the tool change unit being coupled to the rotational axle.

A tool change device, at least comprising a tool change unit and a power unit,

• wherein the tool change unit at least comprises:
• a base and two tool arms rotatably mounted on the base, each of the tool arms being located on a respective one of two opposite sides of the base, the base comprising a coupling section coupled to the power unit so that the power unit is configured to rotate the base about a first axis, each of the tool arms comprising a respective arm body, a respective position-returning element, a respective gripping element, and a respective actuation element;
• wherein each of the arm bodies has one end forming a respective pivoting end pivotally coupled to the base such that each of the arm bodies is pivotable relative to the base about a respective further axis, and each of the arm bodies has a respective opposite end opposite the corresponding pivoting end and forming a respective gripping end that is provided with a respective gripping element;
• wherein each of the position-returning elements is arranged between the corresponding arm body and the base so as to connect the corresponding arm body and the base, so that by means of the arrangement of the corresponding position-returning element, each of the arm bodies is rotatable about the corresponding further axis upwards and downwards between a first position and a second position;
• wherein each of the gripping elements is formed with a respective opening for gripping and holding a respective tool bar;
• wherein each of the actuation elements is mounted on a respective one of the arm bodies and is adapted to be driven by a main tool axle to cause the corresponding arm body to rotate downwards;
• and
• wherein the power unit at least comprises a rotational axle that is drivable to rotate, the tool change unit being coupled to the rotational axle,
• the tool change device further comprising a circular disc style tool magazine, wherein the circular disc style tool magazine at least comprises:
• a magazine body;
• a rotation disc;
• multiple tool receptacles mounted on the rotation disc for rotation with the rotation disc about a rotation disc rotation axis, the multiple tool receptacles being arranged annularly;
• a driving device;
• and
• an upward-downward push-pull device;
• the magazine body being provided, on one side thereof, with a protruding ring that protrudes axially in the direction of the rotation disc rotation axis;
• the rotation disc comprising:
• a through hole;
• multiple rotation bearings arranged in an annular form, and
• multiple driving bearings annularly arranged along an outer circumference of the annular form of the rotation bearings, the rotation bearings being located closer to the through hole than are the driving bearings,
• wherein the annularly arranged multiple rotation bearings being fit over the protruding ring of the magazine body and being rotatable and rolling on the protruding ring;
• the driving device being coupled to and fixed to the magazine body and located on a side of the magazine body that is opposite to the side of the magazine body at which the protruding ring is located, and the driving device comprising a driving section drivable to rotate, the driving section being set in abutting engagement with each of the driving bearings, so that the driving section, when rotating, drives the rotation disc to rotate forward or backward;
• the upward-downward push-pull device comprising a push-pull section, the push-pull section being drivable to move upwards and downwards;
• each of the tool receptacles comprising a respective receptacle body having a respective longitudinal direction, each of the receptacle bodies having a respective first end from which a respective constraining section extends transversely to the corresponding longitudinal direction, each of the constraining sections being provided with a respective roller rotatably mounted thereto, each of the top ends of the receptacle bodies being provided with a respective axle bar projecting outward therefrom to pivotally couple to the rotation disc, each of the receptacle bodies having a respective second end that is made in a hollowed form, each of the receptacle bodies being of a partially covering form and including a respective opening formed in one side of the corresponding receptacle body and in communication with an area outside of the corresponding receptacle body, wherein each of the openings has a respective top end that is formed as a narrowed opening having a reduced diameter as compared to a diameter of an interior of the corresponding receptacle body, wherein each of the narrowed openings is in communication with the corresponding interior of the corresponding receptacle body, wherein a respective positioning section is formed inwardly of the corresponding one of each of the narrowed openings, wherein each of the receptacle bodies includes a respective inner surface, wherein for each of the receptacle bodies, a respective gripping section is provided to each of two sides of the corresponding inner surface;
• and
• wherein when the rotation disc rotates about the rotation disc rotation axis, each of the rollers of each of the tool receptacles passes through the push-pull section of the upward-downward push-pull device and is pushed and pulled in upwards and downward directions to pivot the corresponding tool receptacle relative to the rotation disc.