| 摘要 |
PURPOSE:To eliminate the influence of the wear of a sliding part of oil passage and to improve the durability of a titled device, by press-inserting a holder into a guide hole and forming a clamp-oil communicating passage through a guide bar connected to a frame by a flexible pipe. CONSTITUTION:A grindstone holder 11 is moved back and forth, together with a grindstone 15 clamped by a hydraulic 25 cylinder 20, in the inside of a square- hole guide 12 of frame 10 by a piston 13 in a cylinder 14 of frames 10, 14a. A clamp oil 25 is communicated to an annular-groove chamber 107 between a guide bar 105, a packing 108, and a guide hole 103 of holder 11 through a flexible pipe 14 of flange 102 attached to a frame 14a. Further, the chamber 107 is communicated with a piston 20 by oil passages 111, 112, 28, 29. Therefore, with respect to the backward and forward movement of holder 11, the guide bar 105 slides along the guide 103 in a state of being conformingly fitted to the hole 103 without causing the change of volume of the oil passage. Accordingly, the oil passage is free from the influence due to the wear of sliding part such as the holder 11, and the durability of the device is improved. |
