| 摘要 |
<p>PROBLEM TO BE SOLVED: To restrict a rotation moment from being generated in such a direction as one in which a location near a high pressure side pressure chamber in the end surface of a rotor is away from a seal surface so as to assure a sealing characteristic.SOLUTION: A supporting part 19bb is displaced to a side away from a seal surface 71b in an axial direction of a rotary shaft 54. With this arrangement above, in the case that a high pressure brake fluid pressure is applied to an outer peripheral surface of an inner rotor 19b, i.e. a surface of an outer tooth part and a force is applied in a diametral inner direction of the inner rotor 19b, it is possible to restrict a rotation moment from being generated in such a direction as one in which a location of the end surfaces of the inner rotor 19b, near the high pressure side pressure chamber is away from the seal surface 71b and it becomes more possible to assure a sealing characteristic. Further, a corner part 19bc at the seal surface 71b of the supporting part 19bb is arranged far from the seal surface 71b from the axial center of the inner rotor 19b. With this arrangement above, it is possible to generate a rotation moment for pushing the inner rotor 19b against the seal surface 71b.</p> |
