A head for a swing arm assembly is provided for a spot welding machine. The head can accommodate a tip dresser or a tip exchanger.

A horizontal articulated robot includes: a base; a first arm that is supported by the base so as to be pivotable in a horizontal direction; a second arm that is supported by the first arm so as to be pivotable in the horizontal direction; a shaft that is supported by the second arm so as to be linearly movable in a vertical direction along a longitudinal axis; a stopper that is attached to the shaft and that restricts the movement of the shaft in the vertical direction within a movable range; and a buffering member provided in the second arm, wherein the buffering member is disposed between the stopper and a counterpart member that is provided in the second arm and that faces the stopper in the vertical direction, and buffers an impact exerted on the counterpart member from the stopper.

Provided, for example, is a rotary actuator that is equipped with a rotation restricting mechanism for restricting the rotation of a stopped rotor. The rotation restricting mechanism is provided with: a rotation-side restricting member fixed to the rotor; a fixed-side restricting member that engages with the rotation-side restricting member and restricts the movement of the rotation-side restricting member in the circumferential direction of the rotor; and a drive mechanism that moves the fixed-side restricting member in the axial direction of the rotor. A plurality of protrusions that project toward the outer side of the radial direction of the rotor are formed in the rotation-side restricting member. A restricting part 46a that penetrates in between the protrusions in the circumferential direction and restricts the movement of the rotation-side restricting member in the circumferential direction is formed in the fixed-side restricting member.

A robotic tool changer includes a locking mechanism that enhances safety. More particularly, the locking mechanism is an over center locking mechanism that maintains a constant lock force on a tool. The lock force exerted on the tool by the locking mechanism remains substantially constant, even after a motor providing power to the robotic tool changer is removed, and after the robotic tool changer experiences mechanical wear.

A calibration area has a rectangular area and a peripheral area. The rectangular area includes a center area provided in the center portion and a first corner area, a second corner area, a third corner area, and a fourth corner area that are set at four corners sequentially in the circumferential direction. The center area has a line symmetry with respect to each of the two orthogonal axes passing through the center of the rectangular area. The heights of the areas are different.

A robot includes a robot main body including a first member, a second member, and a joint that coupling the first and the second members together so as to be relatively rotatable around an axis, a fixed stopper fixed to the first member, and an adaptor and a movable stopper that are each detachably attached to the second member. The second member has a main-body-side attachment part to which either one of the adaptor and the movable stopper is selectively attached. The adaptor has an adaptor-side attachment part to which the movable stopper is attached and which is arranged in a position different from that of the main-body-side attachment part in a circumferential direction around the axis, while the adaptor is in a state of being attached to the main-body-side attachment part.

A robotic arm assembly includes a main body, a number of servos arranged within the main body, each of which has an output shaft, and a rotary connection member connected to the output shaft of one of the servos at a first end of the main body. The rotary connection member defines a through hole allows cables to pass therethrough.

A mechanical stopper device wherein a fixed body includes a fixing-side stopper, including: a lever that can swing about a supporting shaft provided to the fixed body; and a pair of elastic bodies, attached to the fixed body, on both sides in the lever swinging direction, and which can contact with both side surfaces of the lever. Further, a rotating body includes a stopper pin that can be in contact with both the side surfaces of the lever. The ratio between a distance (a) from a supporting point of the lever to a contact position where the lever and the stopper pin are in contact with each other, and a distance (b) from the supporting point of the lever to a contact position where the lever and the elastic bodies are in contact with each other is 1.05a/b2.30, and thickness (D) of the elastic bodies is 20 mmD40 mm.

A stopper apparatus for robot rotary joint, for limiting the rotation angle of a turning shaft. The stopper apparatus includes: a rotary protrusion, fixed to the shaft and extended from an outer circumference surface of the shaft; a ring-like orbit, fixed to a mounting housing of the robot rotary joint, inserting the shaft therein; a first slider and a second slider, rotatably accommodated in the orbit and able to push each other to rotate; a stop protrusion, fixed to the housing of a robot rotary joint and extended in the direction of the center of the shaft; the rotary protrusion is able to directly push the second slider to rotate, while it is not able to directly push the first slider to rotate; the shaft, the rotary protrusion and the second slider cannot be obstructed by the stop protrusion when rotate, while the first slider is able to be obstructed by the stop protrusion when rotate, thereby the relative rotation between the shaft and the housing can be stopped. The present invention also provides a rotary joint and a robot. Compared with the existing prior arts, the proposed solution enables a rotation range larger than 360 degrees.

An assembly for a robot includes a servo comprising an output gear, a servo housing connected to the servo, a rotary support connected to the servo and the servo housing, the rotary support being configured to rotate as driven by the servo; and a stopper assembly arranged at the servo housing and the rotary support. The stopper assembly is used to limit the rotary support to be rotatable in a predetermined range.