Transmission mechanism and robot
AssigneeHonda Motor Co., Ltd.
InventorTetsuya Ishikawa
Life of this patent
Estimating the term…
Abstract
A transmission mechanism configured to be interposed between a drive device and a driven member configured to be driven by a torque outputted by the drive device, the transmission mechanism comprises a flexible shaft having an input end receiving the torque outputted by the drive device, a conversion mechanism having an input shaft supported by a link member via a first bearing in a rotatable but axially immovable manner and configured to receive the torque from the flexible shaft and a converter for converting the torque of the input shaft into an axial force, and a blocking device that allows the transmission of the torque from the flexible shaft to the input shaft but blocks transmission of the axial force from the flexible shaft to the input shaft.
Claims15
A transmission mechanism configured to be interposed between a drive device and a driven member configured to be driven by a torque outputted by the drive device, the transmission mechanism comprising:
- a flexible shaft having an input end receiving the torque outputted by the drive device and an output end outputting the torque;
- a conversion mechanism having an input shaft supported by a link member via a first bearing in a rotatable but axially immovable manner and configured to receive the torque from the flexible shaft, a converter for converting the torque of the input shaft into an axial force, and an output member outputting the axial force provided by the converter;
- and
- a blocking device that allows the transmission of the torque from the flexible shaft to the input shaft but blocks transmission of an axial force from the flexible shaft to the input shaft,
- wherein the blocking device includes a coupling that is coupled to the flexible shaft in a rotationally fixed and axially immovable manner, and coupled to the input shaft in an axially movable manner, and a second bearing rotatably supporting the coupling,
- wherein the flexible shaft is coupled to the input shaft via the coupling,
- wherein a direction of extension of a rotation axis of the coupling is the same as a direction of linear motion of the output member, and
- wherein the input shaft is formed to be less flexible than the flexible shaft.
A transmission mechanism configured to be interposed between a drive device and a driven member configured to be driven by a torque outputted by the drive device, the transmission mechanism comprising:
- a flexible shaft having an input end receiving the torque outputted by the drive device and an output end outputting the torque;
- a conversion mechanism having an input shaft supported by a link member via a first bearing in a rotatable but axially immovable manner and configured to receive the torque from the flexible shaft, a converter for converting the torque of the input shaft into an axial force, and an output member outputting the axial force provided by the converter;
- and
- a blocking device that allows the transmission of the torque from the flexible shaft to the input shaft but blocks transmission of an axial force from the flexible shaft to the input shaft,
- wherein the blocking device includes a coupling that is coupled to the flexible shaft in a rotationally fixed and axially immovable manner, and coupled to the input shaft in a rotationally fixed and axially movable manner, and a second bearing rotatably supporting the coupling,
- wherein the coupling includes a cylindrical portion having a bottom wall at one end, and a shaft portion rotatably supported by the second bearing and disposed coaxially with the cylindrical portion,
- wherein the cylindrical portion engages with the input shaft,
- wherein a gap is formed in an axial direction between the bottom wall and the input shaft,
- wherein the bottom wall of the cylindrical portion is provided on a side of the second bearing with respect to the input shaft,
- wherein the flexible shaft is coupled to the shaft portion,
- wherein a direction of extension of a rotation axis of the coupling is the same as a direction of linear motion of the output member, and
- wherein the input shaft is formed to be less flexible than the flexible shaft.
A transmission mechanism configured to be interposed between a drive device and a driven member configured to be driven by a torque outputted by the drive device, the transmission mechanism comprising:
- a flexible shaft having an input end receiving the torque outputted by the drive device and an output end outputting the torque;
- a conversion mechanism having an input shaft supported by a link member via a first bearing in a rotatable but axially immovable manner and configured to receive the torque from the flexible shaft, a converter for converting the torque of the input shaft into an axial force, and an output member outputting the axial force provided by the converter;
- and
- a blocking device that allows the transmission of the torque from the flexible shaft to the input shaft but blocks transmission of an axial force from the flexible shaft to the input shaft,
- wherein the blocking device includes a coupling that is coupled to the flexible shaft in a rotationally fixed and axially immovable manner, and coupled to the input shaft in a rotationally fixed and axially movable manner, and a second bearing rotatably supporting the coupling,
- wherein the coupling includes a cylindrical portion having a bottom wall at one end, and a shaft portion rotatably supported by the second bearing and disposed coaxially with the cylindrical portion,
- wherein the cylindrical portion engages with the input shaft,
- wherein a gap is formed in an axial direction between the bottom wall and the input shaft,
- wherein the bottom wall of the cylindrical portion is provided on a side of the second bearing with respect to the input shaft,
- wherein the flexible shaft is coupled to the shaft portion,
- wherein a direction of extension of a rotation axis of the coupling is the same as a direction of linear motion of the output member,
- wherein the flexible shaft is directly coupled to the coupling,
- wherein the coupling is directly coupled to the input shaft, and
- wherein the input shaft is directly coupled to the output member.
Dependencies are inferred from the claim text.