Electric actuator
AssigneeSMC Corporation
InventorKazuhiro Iida
Life of this patent
Estimating the term…
Abstract
A hollow yoke is inserted into a bore section of a frame. The yoke is connected to a slider via a slit in the frame. A timing belt is inserted into a belt hole of the yoke. Further, a pair of guide members are provided on both side surfaces of the yoke, which engage with guide grooves of the frame. The yoke is displaced along the guide grooves by the timing belt, under a driving action of a driving section. Accordingly, the slider is displaced in the axial direction along the frame.
Claims7
An electric actuator for transmitting a driving force of a driving section to a displacement member via a driving force-transmitting belt, said electric actuator comprising:
- said driving section, which is driven in accordance with an electric signal;
- a hollow frame to which said driving section is connected;
- said displacement member, which is provided displaceably in an axial direction of said frame;
- and
- a guide member comprising a tubular yoke having an internal hole therein that extends axially through said tubular yoke for insertion of said driving force-transmitting belt, said guide member being connected to said displacement member and being guided displaceably in said axial direction within said frame,
- wherein said guide member includes guide sections, which are guided with respect to said frame, said guide sections being arranged at positions deviated toward said frame as compared with said driving force-transmitting belt inserted into said hole,
- wherein said driving force transmitting belt and said guide sections outside of said yoke are located at the same height, and
- wherein said guide sections are provided on both lateral side surfaces of said guide member extending in said axial direction respectively, said guide sections abut against and engage in surface-to-surface sliding contact with grooves provided and formed in respective inner side walls of said frame, and said drive force-transmitting belt is trained around two respective pulleys, each of said pulleys being supported on rotary shafts that extend in a vertical direction.
Dependencies are inferred from the claim text.