| 摘要 |
A rotation detecting device, which is compatible regardless of whether a process control device for processing an output signal of the rotation detecting device is standard one or new one having high input signal resolving power, and, also, a rotation detecting device equipped bearing assembly having such rotation detecting device, are provided. The rotation detecting device includes an encoder provided rotatably and having a plurality of circumferentially equidistantly arranged to-be-detected poles, and a sensor for detecting the to-be-detected poles. The use is made of a multiplying unit for multiplying the phase of the to-be-detected poles from an output of the sensor. The use is also made of a pulse outputting unit for receiving an output of the multiplying unit or both the output of the multiplying unit and an output of the sensor and output pulses having two multiplying powers different from each other. |
| 主权项 |
1. A rotation detecting device provided in a bearing assembly comprising:
an annular encoder provided rotatably and having a plurality of to-be-detected poles circumferentially equidistantly arranged therein; a sensor for detecting the to-be-detected poles of the encoder; a pulse outputting unit including an ordinary output section for outputting pulses, obtained from a detection output of the sensor, without passing through a multiplying unit, and a high resolution pulse output section for outputting pulses generated from the output of the multiplying unit; and a cap to cover an end face opening of an outer member of the bearing assembly, wherein the pulse outputting unit is adapted to receive an output of the multiplying unit or both an output of the multiplying unit and a detection output of the sensor and is capable of outputting pulses of at least two types of magnifying powers that are different from each other, the multiplying unit is configured to multiply a phase of the to-be-detected poles based on an output of the sensor, the cap includes
a cylindrical core metal fitted onto an end outer periphery of the outer member; anda molding material portion, provided on an inner periphery of the core metal, in which the sensor is embedded, and the core metal includes
a positioning upright wall member protruding radially inwardly thereof to abut an end face of the outer member;a mounting portion in the form of a cylindrical portion protruding towards an outboard side beyond the positioning upright wall member;an annular engagement projection protruding radially inwardly thereof in the form of an arcuate sectioned groove with its rear side being recessed, provided in the mounting portion and at a location axially spaced from an opening edge of the mounting portion; anda plurality of slits formed in the mounting portion so as to be spaced circumferentially equidistantly and extend axially, andwherein the outer member is formed with, in an outer periphery thereof, an engagement recess configured to engage the engagement projection, andwherein the opening edge of the mounting portion has an inner diameter substantially equal to an outer diameter of the end outer periphery of the outer member. |
