| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply mount a reservoir for absorbing the expansion/contraction of a working fluid due to temperature changes without using any special member in the case of a hydraulic coupling device of a power transmission system for a four-wheel drive vehicle. SOLUTION: The reservoir 55 is housed within a through hole 27b in a rotor shaft 27 for supporting a rotor 35 of a vane pump P. The reservoir 55 comprises a tubular elastic body 56 made of rubber and a blockage member 57. By fixing the blockage member 57 by press fitting or other means onto a step part 27c of the through-hole 27b in the rotor shaft 27, the blockage of an opening part of the elastic body 56, the fixation of the reservoir 55 within the through-hole 27b, the outflow prevention of the working fluid from the through-hole 27b, and the outflow prevention of air to the through-hole 27b can be simultaneously achieved.</p> |
