| 摘要 |
PURPOSE:To prevent the recess and projection section of a pulser from blinding and a captioned device from malfunctioning for a smooth rotation by providing seals on both axial sides of a pulser fitting section and a rolling element arranging section respectively, by forming two closed spaces, and by filling lubricant only into a rolling element arranging space. CONSTITUTION:Seals 13 are provided on both axial sides of the wheel bearing 3 of a double row ball bearing to form a closed rolling element arranging space B with inner and outer rings 9 and 10 to be filled with lubricant grease, and a pulser 7 is also provided on the extention section 14 of the inner ring 9. And a seal 5 is fitted to the inner peripheral section of the suspension section 4 on the axial outside of the wheel bearing 3 forming a closed space A by a seal lip 5a and the outer periphery of the shaft section of a hub 2. A sensor 6 for detecting revolving speed is formed by the proximity switch 8 mounted on the suspension section 4 and the pulser 7. Since the recess and projection section of the pulser 7 is, therefore, prevented from blinding caused by rusty fragment, and lubricant is not stirred by the pulser 7, a smooth rotation without mulfanction can be obtained. |
