摘要:
An industrial robot with a horizontal telescopic arm unit having an arm casing horizontally slidably mounted on a vertical upright column, a telescopic arm encased in the arm casing to be telescopically moved with respect to the arm casing and in synchronism with the horizontal sliding movement of the arm casing, and a common drive motor causing the horizontal linear sliding movement of the arm casing and the telescopic movement of the telescopic arm via a rotation to linear movement converting mechanism.
摘要:
A gear box (30) housing a reduction gear unit (24) and supporting a drive motor (22), and a elongated screw shaft (12) is fitted over a base plate (14) so that an area of a shaft supporter (10) projected in a plane perpendicular to a longitudinal direction of the elongated screw shaft is reduced, which supporter supports both ends of the elongaged screw shaft (12) for moving a movable element such as an arm of an industrial robot in a predetermined direction. Furthermore, a circular boss portion (32b) provided at the lower face of the gear box (30) and a hole (14a) provided at the base plate (14) are used for positioning the gear box on the base plate (14), and the positioning in a height direction is achieved by positioning elements (40) having a predetermined height dimension when the gear box (30) is attached to the base plate (14).
摘要:
In a horizontal revolute robot, an upper end of a ball screw (21) of a direct-acting actuator (100) is rotatably supported by a top plate of a column (10), and the lower end thereof is coupled to a drive unit (40) disposed on a base plate of the column. A first link (220) is pivotally coupled to a coupling member (210) of a manipulator (200) fixed to a slider (30) of the actuator, and a second link (240) is pivotally coupled to the first link. The ball screw is rotated by the drive unit to move the manipulator along the ball screw in unison with the slider, and servomotors (230, 250) of the manipulator are driven to turn both the links within a horizontal plane, so that a wrist portion of the robot is positioned in a robot installation space for robot operation. Since no base is required to turnably support the actuator, the robot is small-sized, light in weight, and low-priced. Since the lower movement limit position of the manipulator is low, the range of action of the robot is wide.
摘要:
An industrial robot having a plurality of axes drivable by respective servomotors is stopped in operation after detecting a collision of the industrial robot with foreign matter. The monitoring of a position error of a servomotor for the axis with respect to which the collision is detected is stopped (S11), and the speed command for that axis is set to "0" (S12). A reverse torque is generated (S13) to decelerate and stop the servomotor. After elapse of a predetermined period of time (S14), the monitoring of a position error is resumed (S15). If the position error exceeds a predetermined value (S31), then an alarm is activated (S32). Then, currents supplied to all the servomotors are cut off (S33), thus stopping the operation of the robot in a short period of time.
摘要:
A direct-acting actuator for an industrial robot has an elongate ball screw or feed screw which is attached or detached quickly and safely in a narrow working space. In attaching the ball screw, upper and lower end portions of the ball screw, diagonally inserted in the inside space of a column (10), are respectively fitted into holes (12a, 33a) of a column top plate (12) and a plate member (33) of a slider (30) through a passage (12b), formed in the top plate and opening in a slider-side end face of the same plate, and a passage (33b), formed in the plate member and opening in the distal end face of the same member. Then, the lower end of the ball screw is coupled to a reduction gear (52), and a bearing unit (22) mounted on the upper end of the ball screw and a ball nut (34) threadedly engaged with the ball screw are respectively fitted into the holes (12a, 32a) so that the bearing unit and the ball nut are fixed to the top plate and the plate member, respectively.
摘要:
A collision detection/drive stoppage method capable of promptly detecting a collision of machine operating parts driven by servomotors with a foreign object, and of promptly stopping drive of the machine operating parts upon detection of a collision, thereby preventing or lessening damage to a machine, etc., caused by the collision. A digital signal processor of an axis controller, forming a software servo system, periodically calculates a velocity deviation (.epsilon.v) in accordance with a command velocity (Vc) calculated based on a command from a main computer and an actual motor velocity (V) from a pulse coder of the servomotor (S2), determines whether the absolute value (.vertline..epsilon.v-.epsilon.v'.vertline.) of the difference between the velocity deviation of the current servo control period and that of the previous control period is smaller than a collision discriminating reference value (ERR) (S3), and causes an alarm to be displayed and at the same time delivers a torque command having a value of zero to stop rotation of the servomotor (S8, S9) when the absolute value is larger than the reference value.
摘要:
A collision detecting method is provided which is capable of promptly detecting a collision of robot operating parts driven by servomotors, e.g., robot arms, with a foreign object. Prompt detection of such collisions aids in preventing or limiting damage to a machine, etc. by the collision. A digital signal processor of an axis controller (2) of FIG. 1, as part of a software servo system, calculates a velocity command and a torque command in accordance with a movement command supplied from a main computer (1), to periodically carry out servo control for individual axes of the robot. The digital signal processor also determines whether the torque command or a velocity deviation between the velocity command and an actual velocity of a servomotor (13b) is greater than a respective predetermined value. When the torque command or velocity deviation becomes greater than the respective predetermined value, the collision detecting method determines that a collision of the robot operating part (13a) with a foreign object or the like has occurred, and the operation of the servomotor is stopped.
摘要:
A hand changing device for industrial robots, having a changer body (10) designed to be attached to the robot arm (92) and a changer adapter (50) carrying a robot hand. The changer body (10) and the changer adapter (50) are separate components designed to be coupled detachably. The changer adapter (50) carrying the robot hand (74) is clamped by the changer body (10) by the engagement of a plurality of clamping balls retained within the changer body (10) and a ball engaging part formed in the changer adapter (50). The changer body (10) is provided with a fluid-driven piston (20) to move the clamping balls between two positions, namely, the clamping position and the idle position.
摘要:
A robot hand provided with fingers driven by a double acting cylinder and supplied working liquid pressure through two, 2-position, 5-port-type, single solenoid, electromagnetic valves, wherein: (a) an outlet of a first electromagnetic valve is connected with the inlet thereof in response to the ON position of the solenoid thereof and is connected with the inlet of a first chamber of the double acting cylinder; (b) an outlet of a second electromagnetic valve is connected with the inlet thereof in response to the OFF position of a second chamber of the double acting cylinder; (c) an outlet of the first electromagnetic valve is connected with the inlet thereof in response to the OFF position of the solenoid thereof and is plugged; (d) an outlet of the second electromagnetic valve is connected with the inlet thereof in response to the ON position of the solenoid thereof and is plugged; and (e) a working liquid pressure source is connected with the inlet of the first and second electromagnetic valves. This robot hand is capable of maintaining an object in a held position even in the event of an electric power supply failure.
摘要:
An angle adjusting mechanism or a linear axis of a processing machine is provided with a reciprocation device. A tool and a tool cutting mechanism are mounted on a moving part of the reciprocation device. A workpiece is processed by the tool based on a combination of the drive of the processing machine and the drive of the reciprocation device.