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US 12,480,276 B2Granted
Electric cylinder and work machine
AssigneeKomatsu Ltd.
InventorsHideshi Iitani, Shouta Akazaki
Life of this patent
Estimating the term…
Abstract
This electric cylinder includes a motor that serves as a driving source, an output shaft that rotates in response to driving of the motor, a first rotor that is joined to the output shaft and rotates in response to rotation of the output shaft, and a second rotor that is adjacent to the first rotor and rotates in response to rotation of the first rotor. The first rotor has an open hollow portion capable of accommodating a lubricant therein.
Claims9
An electric cylinder comprising:
- a motor that serves as a driving source;
- an output shaft that rotates in response to driving of the motor;
- a first rotor that is joined to the output shaft and rotates in response to rotation of the output shaft;
- and
- a second rotor that is adjacent to the first rotor and rotates in response to rotation of the first rotor,
- wherein the first rotor has an open hollow portion accommodating a lubricant therein,
- wherein the lubricant inside the hollow portion is configured to flow toward the outward side in the radial direction of the first rotor in response to rotation of the first rotor.
4 more elements
An electric cylinder comprising:
- a motor that serves as a driving source;
- an output shaft that rotates in response to driving of the motor;
- a first rotor that is joined to the output shaft and rotates in response to rotation of the output shaft;
- and
- a second rotor that is adjacent to the first rotor and rotates in response to rotation of the first rotor,
- wherein the first rotor has an open hollow portion capable of accommodating a lubricant therein,
- wherein the output shaft protrudes outward in an axial direction from an end surface of the motor in the axial direction,
- the first rotor is formed to have a cylindrical shape which is coaxial with the output shaft, and
- the hollow portion opens outward in the axial direction of the first rotor, wherein the electric cylinder further comprising:
- a planetary gear mechanism that transmits a driving force of the motor to a piston,
- wherein the planetary gear mechanism includes
- a sun gear serving as the first rotor,
- a plurality of planetary gears serving as the second rotor,
- carriers rotatably supporting central shafts of the plurality of planetary gears, and
- a ring gear surrounding the plurality of planetary gears,
- wherein the carriers have guide grooves extending from positions facing an outer circumference of the sun gear toward the central shafts of the planetary gears and recessed so as to allow the lubricant to circulate therein.
13 more elements
Dependencies are inferred from the claim text.