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US 6,655,225 B1Granted
Motor-driven actuator
AssigneeSMC Corporation
InventorsShigekazu Nagai, Akio Saitoh, Masaki Miyahara
Life of this patent
Estimating the term…
Abstract
A load of a workpiece, which is applied to a slider (68), is supported by guide blocks (78) and guide rails (30a, 30b) provided for a frame (12). On the other hand, pin members (72), which constitute a floating mechanism (64) provided under the slider (68), are slidably engaged with fitting members (66) installed to recesses (62) of a projection (54). Therefore, a ball screw (16) is prevented from any application of the load of the workpiece via a displacement member (46).
Claims17
An electric actuator comprising:
- a frame;
- a rotary driving source arranged on said frame;
- a feed screw for transmitting a rotary driving force of said rotary driving source;
- a feed nut engaged with said feed screw, for converting rotary motion of said feed screw into rectilinear motion;
- a displacement member connected to said feed nut, or making displacement in an axial direction of said frame;
- a projection provided for said displacement member and protruding to the outside through a slit formed in said frame;
- a slider installed on said projection;
- a guide mechanism provided at the outside of said frame, for guiding said slider, wherein said guide mechanism includes a guide rail installed on the outside of said frame and extending in a displacement direction of said displacement member, and a guide block installed on said slider, for making slidable engagement with said guide rail, and wherein said guide rail is detachably installed on said frame by the aid of a long groove formed in a longitudinal direction on an outer wall surface of said frame;
- an attachment member for supporting said guide rail;
- a fitting member for being fitted into said long groove formed on said outer wall surface of said frame;
- and
- a screw member for fixing said attachment member to said fitting member,
- wherein a load applied to said slider is supported by said guide mechanism,
- wherein said slider is connected to said projection through a floating mechanism, which enables said slider to be displaceable toward the feed screw in a direction normal to an axial direction of said feed screw when said load is applied to said slider, and
- wherein said floating mechanism includes a sliding member installed to one of a bottom surface portion of said slider and an upper surface portion of said projection, and said sliding member is provided slidably in a recess formed on one of said upper surface portion of said projection and said bottom surface portion of said slider.
12 more elements
An electric actuator comprising:
- a frame;
- a rotary driving source arranged on said frame;
- a feed screw for transmitting a rotary driving force of said rotary driving source;
- a feed nut engaged with said feed screw, for converting rotary motion of said feed screw into rectilinear motion;
- a displacement member connected to said feed nut, for making displacement in an axial direction of said frame;
- a projection provided for said displacement member and protruding to the outside through a slit formed in said frame;
- a slider installed to said projection;
- and
- a guide mechanism provided at the outside of said frame,
- wherein a load applied to said slider is supported by said guide mechanism,
- wherein said slider is connected to said projection through a floating mechanism, which enables said slider to be displaceable toward the feed screw in a direction normal to an axial direction of said feed screw when said load is applied to said slider, and
- wherein said floating mechanism includes a pin member installed on a bottom surface portion of said slider, and said pin member is provided slidably in a recess formed on said projection.
9 more elements
An electric actuator comprising:
- a frame;
- a rotary driving source arranged on said frame;
- a feed screw for transmitting a rotary driving force of said rotary driving source;
- a feed nut engaged with said feed screw, for converting rotary motion of said feed screw into rectilinear motion;
- a displacement member connected to said feed nut, for making displacement in an axial direction of said frame;
- a projection provided for said displacement member and protruding to the outside through a slit formed in said frame;
- a slider installed to said projection;
- and
- a guide mechanism provided at the outside of said frame,
- wherein a load applied to said slider is supported by said guide mechanism,
- wherein said slider is connected to said projection through a floating mechanism, which enables said slider to be displaceable toward the feed screw in a direction normal to an axial direction of said feed screw when said load is applied to said slider, and
- wherein said floating mechanism includes a pin member installed on an upper surface portion of said projection, and said pin member is provided slidably in a recess formed on a bottom surface portion of said slider.
9 more elements
Dependencies are inferred from the claim text.