| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the degree of suppression of braking force mechanically generated based on operation of a parking lever 4a by hydraulic pressure led into a cylinder 6a following operation of a service brake without complicating a shape of each structure member. <P>SOLUTION: A relay member 5a is oil-tightly inserted through a through hole 18a provided on a bulkhead 17a dividing the cylinder 6a and a retention hole 2a. A cylindrical liner member 23 having a side opening 24 is fitted and fixed in the retention hole 2a. A base end part of the relay member 5a is inserted in an inner diameter side of the liner member 23 through the side opening 24. A rolling surface of one roller 11a constructing one cam mechanism 15a is made in direct rolling contact on an base end surface 26 of the relay member 5a. A rolling surface of another roller 11b constructing another cam mechanism 15b is made in rolling contact with a bearing surface 25 provided on an inner surface existing at an opposite side of the side opening 24 with a camshaft 3a put therebetween in the liner member 23. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
