| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multidisc friction engaging device that improves hydraulic reproducibility inside a chamber room upon an operation of a piston without reducing a torque capacity of a drive plate. <P>SOLUTION: A multidisc brake device 1 includes: a piston retainer 10; the piston 12; a plurality of separator plates 14; a friction material disk 16 which is installed between the respective separator plates 14; the chamber room 26; and an apply orifice 30 which supplies oil to the chamber room 26. The piston 12 includes: a communication hole 58 which is communicated with an inside and outside of the chamber room 26 and of which diameter is smaller than that of the apply orifice 30; and a pressing part 60 which presses the separator plate 14 installed at a closest position to the piston 12 among the plurality of separator plates 14. An opening 68 on the outside of the chamber room 26 in the communication hole 58 is provided on the pressing part 60. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
