Electric cylinder and work machine
AssigneeKomatsu Ltd.
InventorsHideshi Iitani, Shouta Akazaki
Life of this patent
Estimating the term…
Abstract
An electric cylinder includes a shaft, a bearing that is provided in an outer circumference of the shaft, and a holder that surrounds the shaft with the bearing therebetween. The holder includes a holder main body opening in an axial direction of the shaft and supporting the shaft with the bearing therebetween, and a trunnion portion having a cylindrical shape protruding outward in a manner of intersecting the axial direction from the holder main body. The holder is constituted so as to allow a lubricant to circulate therein from a side outward in the axial direction of the holder main body toward an inner circumference of the trunnion portion.
Claims12
An electric cylinder comprising:
- a shaft;
- a bearing that is provided in an outer circumference of the shaft;
- and
- a holder that surrounds the shaft with the bearing therebetween,
- wherein the holder includes
- a holder main body opening in an axial direction of the shaft and supporting the shaft with the bearing therebetween, and
- a trunnion portion having a cylindrical shape protruding outward in a manner of intersecting the axial direction from the holder main body, and
- the holder is constituted so as to allow a lubricant to circulate therein from a side outward in the axial direction of the holder main body toward an inner circumference of the trunnion portion through a gap in the bearing.
An electric cylinder comprising:
- a shaft;
- a bearing that is provided in an outer circumference of the shaft;
- and
- a holder that surrounds the shaft with the bearing therebetween,
- wherein the holder includes a holder main body opening in an axial direction of the shaft and supporting the shaft with the bearing therebetween, and
- a trunnion portion having a cylindrical shape protruding outward in a manner of intersecting the axial direction from the holder main body, and
- the holder is constituted so as to allow a lubricant to circulate therein from a side outward in the axial direction of the holder main body toward an inner circumference of the trunnion portion,
- wherein the holder has
- an inner guide groove extending throughout a part in the axial direction of an inner circumferential surface of the holder main body and recessed so as to allow the lubricant to circulate therein, and
- an opening hole opening outward in a manner of intersecting the axial direction from the inner guide groove at a center of the trunnion portion in the radial direction,
- wherein the opening hole opens along a central axis of the trunnion portion, when viewed in the radial direction, the opening hole are disposed at positions overlapping central portions of a plurality of bearings in the axial direction.
Dependencies are inferred from the claim text.