A robot arm according to the present invention includes: a shoulder joint assembly which is connected to an upper arm portion, and includes a drive unit for generating driving power; an elbow joint assembly which is provided between the upper arm portion and a forearm portion, and operates by being supplied with driving power from the drive unit; and a wrist joint assembly which is provided between the forearm portion and a hand portion, and operates by being supplied with driving power from the drive unit.

A rotary axis module includes: an input shaft connected to a drive motor; an output shaft, an output shaft flange connected to the output shaft; parallel gears coupled to the output shaft flange; at least two double gears; and a transfer gear that transmits the power of the drive motor to the double gears. The at least two double gears and the transfer gear are disposed so as to surround the output shaft.

An example rotational joint assembly for a robotic medical system, the rotational joint assembly comprising at least one arm segment and a rotational joint provided at one end of the arm segment. The rotational joint is to allow the arm segment to rotate about a rotational axis. The rotational joint comprising a brake to lock rotation of the arm segment at the rotational joint and an actuator to selectively engage or disengage the brake. The actuator comprising a cam having two stable regions separated by two transition regions, the two stable regions comprising a first stable region corresponding to engagement of the brake and a second stable region corresponding to disengagement of the brake.

A robot structure and a rehabilitation device have multiple elements and joints connecting the elements. At least one of the elements includes a first tubular piece with a first outer lateral surface wall, and a second tubular piece with a second outer lateral surface wall. The second tubular piece is arranged such that the length thereof is at an angle to the length of the first tubular piece so that the second tubular piece is inserted into two opposing tubular sections of the first tubular piece, and the second tubular piece passes through the first outer lateral surface wall of the first tubular piece at opposite sides. The second tubular piece is rigidly connected to the first tubular piece by a first connection element and a second connection element.

A joint apparatus for a robot includes a housing, a bearing including an inner ring and an outer ring contacting the housing, a rotating member contacting the inner ring of the bearing, and a driving apparatus configured to rotate the rotating member, where the first housing includes a first support region configured to support a front surface of the outer ring and a first fastening region extending rearward from the first support region and on which a first thread is formed, the sounding housing includes a second support region configured to support a rear surface of the outer ring and a second fastening region extending forward from the second support region and on which a second thread is formed, and the second thread is configured to engage the first thread.

A wrist joint, such as for a surgical instrument, may include a first disc, a second disc adjacent the first disc, and a drive tendon that extends through the first disc and the second disc. The first disc and the second disc may include respective opposing joint features that intermesh with one another. The first disc and the second disc may further include opposing load bearing surfaces separate from the joint features. The drive tendon may exert a force on at least one of the first and second discs to cause relative rotation between the first and second discs. The first and second discs may have a maximum rotational range of motion greater than about +/45 degrees relative to each other.

A joint mechanism includes: a first member; a second member; and a gear device that is provided between the first member and the second member and changes the number of revolutions at a predetermined ratio to transmit a drive force. The gear device includes a crank shaft on which a first eccentric portion is formed, a first oscillating gear that has first external teeth and an insertion hole into which the first eccentric portion is inserted, a carrier that retains the crank shaft rotatably, and an external cylinder that has an internal-tooth pin 3. The carrier and the external cylinder are configured to be displaced coaxially and relatively to each other due to oscillation of the first oscillating gear.

A joint mechanism includes: a first member; a second member that includes a first portion and second portion; a gear device including a crank shaft on which a first eccentric portion is formed, a first oscillating gear that has first external teeth and a first insertion hole, a carrier that retains the crank shaft, and an external cylinder that has internal-tooth pins. The carrier and the external cylinder are configured to be displaced coaxially due to oscillation of the first oscillating gear. The joint mechanism further includes a first fixing member that fixes the external cylinder to the first member, and a second fixing member that fixes the carrier to the second member. The second fixing member includes a one-side fixing member that fixes the carrier to the first portion and an other-side fixing member that fixes the carrier to the second portion.

A robot according to this disclosure includes a vertical multi-joint robot arm including a plurality of joints each of which rotates about a rotation axis; and a tube including at least one of an electric cable and a fluid hose. The tube overlaps a circular area(s) that centers/center the rotation axis/axes of the predetermined joint(s) and has/have a radius(radii) of a distance(s) between the rotation axis/axes of the predetermined joint(s) and an exterior surface(s) of the predetermined joint(s) as viewed in an extension direction(s) of the rotation axis/axes, arranged inside an exterior shape(s) of the predetermined joint(s) as viewed in a direction orthogonal to the rotation axis/axes of the predetermined joint(s).

An arm joint for a manipulator having a motor with a transmission, comprising a gear wheel that can rotate about a transmission axis of rotation, wherein the gear wheel is rotatably mounted in a housing of the arm joint and has an adapter on at least one of its end sides, and wherein the adapter has an opening that is central relative to the transmission axis of rotation on the side facing away from the end side of the gear wheel The central opening has an internal thread for the purpose of a simple construction, easy assembly and a great number of variation possibilities in terms of construction and application.