Wheel rotation detecting device
AssigneeNsk Ltd.
InventorsTakeshi Takizawa, Shigeru Endo, Ikunori Sakatani, Tatsunobu Momono, Yasushi Mutoh
Life of this patent
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Abstract
A sensor unit is supported on a stationary ring which does not rotate even when it is in use, and the rotation of the rotary ring can be detected by a rotation detecting sensor held within the sensor unit. Within the sensor unit, besides the rotation detecting sensor, there are disposed other sensors such as a temperature sensor and a vibration sensor, thereby being able to detect the rotation speed and the rotation number of the wheel supported on the rotary ring, and the other car driving conditions.
Claims30
A wheel rotation detecting device, comprising:
- a rolling bearing unit including:
- a stationary ring supported on a suspension of a body and being unrotatable in use;
- a rotary ring supporting a wheel thereon and being rotatable with said wheel for moving the body in a traveling direction;
- and
- a plurality of rolling elements respectively rollably interposed between a stationary side raceway formed in a peripheral surface of said stationary ring and a rotary side raceway formed in a peripheral surface of said rotary ring;
- an encoder supported on said rotary ring or on a part mounted on said rotary ring and being rotatable with said rotary ring;
- a rotation detecting sensor supported on said stationary ring or a part mounted on said stationary ring in such a manner as to be opposed to said encoder, for detecting the rotation of said rotary ring;
- an acceleration sensor for detecting the vibration of said rolling bearing unit;
- and
- a control unit, wherein
- an acceleration or deceleration of the moving body is detected by the control unit on the basis of a signal of the acceleration sensor, and
- said acceleration sensor is one that detects vibration in a the traveling direction of the body.
A wheel rotation detecting device, comprising:
- a rolling bearing unit including:
- a stationary ring supported on a suspension of a body and being unrotatable in use;
- a rotary ring supporting a wheel thereon and being rotatable with said wheel for moving the body in a traveling direction;
- and
- a plurality of rolling elements respectively rollably interposed between a stationary side raceway formed in a peripheral surface of said stationary ring and a rotary side raceway formed in a peripheral surface of said rotary ring;
- an encoder supported on said rotary ring or on a part mounted on said rotary ring and being rotatable with said rotary ring;
- a rotation detecting sensor supported on said stationary ring or a part mounted on said stationary ring in such a manner as to be opposed to said encoder, for detecting the rotation of said rotary ring;
- an acceleration sensor for detecting the vibration of said rolling bearing unit, and
- a control unit, wherein
- an acceleration or deceleration condition of the moving body is detected by the control unit on the basis of a signal of the acceleration sensor, and
- said acceleration sensor is one that detects vibration in a direction transverse to the traveling direction of the body.
Dependencies are inferred from the claim text.