Mounting structure for magnetic linear scale unit
First Claim
1. A mounting structure for a linear scale assembly comprising:
- a scale assembly including an elongated magnetic scale, and a shield member for establishing a shield around said magnetic scale;
a first end member directly connected to and extending from the first end of said scale, said first end member having a generally cylindrical periphery at least in part;
a second end member directly connected to and extending from the second end of said scale at an opposite end to said first end member, said second end member having a generally cylindrical periphery at least in part;
a first mount secured to a mounting surface at an orientation corresponding to said first end member and defining a groove for receiving said first end member, an inner periphery of said groove being so designed as to mate with said cylindrical periphery of said first end member; and
a second mount secured to a mounting surface at an orientation corresponding to said second end member and defining a groove for receiving said second end member, an inner periphery of said groove being so designed as to mate with said generally cylindrical periphery of said second end member; and
a first projecting member having an annular configuration and formed with and projecting from said cylindrical periphery of said first end member and being interposed between mating peripheries of said first end member and said first mount for reducing contact area between said periphery of said first end member and said inner periphery of said groove for allowing pivotal movement of said scale assembly relative to said first mount; and
,a second projecting member having an annular configuration and formed with and projecting from said second mount and being interposed between mating peripheries of said second end member and said second mount for reducing contact area between said periphery of said second end member and said inner periphery of said second mount groove for allowing pivotal movement of said scale assembly relative to said second mount.
1 Assignment
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Accused Products
Abstract
A magnetic linear scale unit comprises a magnetic scale and mounting blocks which are designed to be rigidly fixed to one of relatively displaceable mechanical components, about which magnitude or stroke of the relative thrusting displacement is to be measured. The magnetic scale has end sections to be mounted on the mounting blocks. The end sections have round peripheral portion mating with the mounting block. At least one of the end section also includes a structural component which allows pivotal movement of the magnetic scale relative to the mounting block for fine adjustment of the axis of the magnetic scale relative to the axis of relative movement of the mechanical components. A scale channel is free from the mounting block and simply serves as the magnetic shield. Therefore, the scale channel of the invention is substantially free from the accuracy requirement and production error of the scale channel and will never affect measurement of the displacement magnitude.
29 Citations
16 Claims
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1. A mounting structure for a linear scale assembly comprising:
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a scale assembly including an elongated magnetic scale, and a shield member for establishing a shield around said magnetic scale; a first end member directly connected to and extending from the first end of said scale, said first end member having a generally cylindrical periphery at least in part; a second end member directly connected to and extending from the second end of said scale at an opposite end to said first end member, said second end member having a generally cylindrical periphery at least in part; a first mount secured to a mounting surface at an orientation corresponding to said first end member and defining a groove for receiving said first end member, an inner periphery of said groove being so designed as to mate with said cylindrical periphery of said first end member; and a second mount secured to a mounting surface at an orientation corresponding to said second end member and defining a groove for receiving said second end member, an inner periphery of said groove being so designed as to mate with said generally cylindrical periphery of said second end member; and a first projecting member having an annular configuration and formed with and projecting from said cylindrical periphery of said first end member and being interposed between mating peripheries of said first end member and said first mount for reducing contact area between said periphery of said first end member and said inner periphery of said groove for allowing pivotal movement of said scale assembly relative to said first mount; and
,a second projecting member having an annular configuration and formed with and projecting from said second mount and being interposed between mating peripheries of said second end member and said second mount for reducing contact area between said periphery of said second end member and said inner periphery of said second mount groove for allowing pivotal movement of said scale assembly relative to said second mount. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mounting structure for a linear scale assembly comprising:
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a scale assembly including an elongated magnetic scale, and a shield member for establishing a shield around said magnetic scale; a first end member directly connected to an extending from the first end of said scale, said first end member having a generally cylindrical periphery at least in part; a second end member directly connected to and extending from the second end of said scale at an opposite end to said first end member, said second end member having a generally cylindrical periphery at least in part; a first mount secured to a mounting surface at an orientation corresponding to said first end member and defining a groove for receiving said first end member at a first portion; and a second mount secured to a mounting surface at an orientation corresponding to said second end member and defining a groove for receiving said second end member at a second portion; a first projecting member having an annular configuration and projecting from said cylindrical periphery of said first end member at a portion mating with said first portion of said first mount for reducing contact area between said periphery of said first end member and said groove of said mount for allowing pivotal movement of said scale assembly relatives to said first mount, and a plurality of rounded top projections formed with end extending from said groove of said second mount at said second portion for reducing contact area between said cylindrical periphery of said second end member and said groove of said second mount for allowing pivotal movement of said scale assembly relative to said second mount. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification