摘要:
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.
摘要:
An articulatable member includes a distal end, a proximal end, an actuation member, and a constraint member. The actuation member extends from the proximal end to the distal end. The actuation member transmits force to bend the articulatable member from a neutral position. The constraint member extends from the proximal end to the distal end. The constraint member may have opposite ends that are fixed to the distal end and the proximal end. In one embodiment, the constraint member follows a helical path along at least a portion of the articulatable member from the proximal end to the distal end. In another embodiment, the actuation member follows a helical path along at least a portion of the articulatable member.
摘要:
An articulatable member includes a distal end, a proximal end, an actuation member, and a constraint member. The actuation member extends from the proximal end to the distal end. The actuation member transmits force to bend the articulatable member from a neutral position. The constraint member extends from the proximal end to the distal end. The constraint member may have opposite ends that are fixed to the distal end and the proximal end. In one embodiment, the constraint member follows a helical path along at least a portion of the articulatable member from the proximal end to the distal end. In another embodiment, the actuation member follows a helical path along at least a portion of the articulatable member.
摘要:
The distal end of a surgical instrument is movable in all six Cartesian degrees of freedom independently of other components of a telemanipulated surgical system. The surgical instrument extends through a guide tube. The distal end is moved by actuators that are telemanipulatively controlled.
摘要:
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.
摘要:
An articulatable member includes a distal end, a proximal end, an actuation member, and a constraint member. The actuation member extends from the proximal end to the distal end. The actuation member transmits force to bend the articulatable member from a neutral position. The constraint member extends from the proximal end to the distal end. The constraint member may have opposite ends that are fixed to the distal end and the proximal end. In one embodiment, the constraint member follows a helical path along at least a portion of the articulatable member from the proximal end to the distal end. In another embodiment, the actuation member follows a helical path along at least a portion of the articulatable member.
摘要:
An instrument wrist uses members having epicycloidal and hypocycloidal surfaces to bear loads and preserve a separation of reference points in the same manner as circles rolling on each other. The cycloidal surfaces can be uniform, stepped, or blended and can be arranged to ensure geared motion of members without addition of additional gearing structures. A hypocycloidal surface provides a concave contact that improves resistance to deformations under load. The wrist mechanism is tendon stayed, which keeps members in contact, and optionally gear structures can be integrated into the members to ensure geared motion and support roll toques.