| 摘要 |
An electronic control brake system is provided to prevent the malfunction of a motor and to increase the general reliability on the system by preventing the inflow of leaking brake oil toward a motor effectively by installing a sealing member between a bearing stopper and a ball bearing. The electronic control brake system comprises many solenoid valves controlling the transfer of brake hydraulic pressure to a hydraulic brake installed to a front wheel and a rear wheel, a pair of low pressure accumulator storing oil leaked from the hydraulic brake temporarily when applying the decompression brake, a pair of pumps(40L,40R) pumping out the stored oil in the low pressure accumulators when applying the compression/holding brake, a pair of high pressure accumulators having an orifice to reduce the pressure pulsation of oil pressurized and discharged by the pumps, a modulator block(31) having a pump mounting bore(31a) to install the pumps, a motor(35) provided with a rotary shaft(35d) and a ball bearing(35i) to support the rotary shaft to rotate smoothly a needle bearing(50) installed to a bearing bore of the modulator block rotatively and attached with a bearing stopper(60) to prevent the separation of the needle bearing, and a sealing member(70) installed between the bearing stopper and the ball bearing to be press-fitted to the rotary shaft and to prevent the oil leaked out from the pumps from flowing in the motor. |
