| 摘要 |
1,029,930. Portable drilling machines. SINGER CO. April 7, 1965 [April 9, 1964], No. 14666/65. Headings B3B and B3C. A portable drilling machine for drilling holes in the web of a rail in situ, comprises a baseplate 1 supported with a three points location on the rails by screws 10, and an arm 3, two clamps 19 aligned with abutments 14 for clamping the plate in position, and an hydraulic motor 27 for rotating the drill 29. Arm 3 is pivotally mounted on the plate at 4, and is vertically adjustable by a screw 6. Clamps 19 are actuated to engage the web of the rail by hydraulic cylinders 22. Motor 27 is carried on a slide 26 which is movable in guides 25 to drill the web, by an hydraulic cylinder 32. |
