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    • 1. 发明授权
    • Hydraulically operated impact device
    • 液压冲击装置
    • US6073706A
    • 2000-06-13
    • US281319
    • 1999-03-30
    • Ilkka Niemi
    • Ilkka Niemi
    • B25D20060101B25D9/18E21C20060101F15B11/028B25D9/04
    • B25D9/18
    • The invention relates to a hydraulically operated impact device, such as a percussion hammer or some other breaking apparatus, comprising a control valve (6) for controlling pressure fluid supplied to and from the percussion piston (1) so that the direction of motion of the piston (1) can be changed in accordance with the cycle of operation of the impact device. According to the inventive idea, when the control valve (6) is in the impact position, the impact device is provided with a closed space that is partly bordered by the control valve and the percussion piston. The percussion piston (1) comprises a section which communicates with said space and which has a larger diameter than the upper end of the piston. The control valve and the percussion piston are thus able to move in the same direction until a connection is opened from this closed space to the upper end of the percussion piston (1).
    • 本发明涉及一种液压操作冲击装置,例如冲击锤或其它破碎装置,其包括用于控制供给冲击活塞(1)和从冲击活塞(1)供应的压力流体的控制阀(6) 活塞(1)可以根据冲击装置的运行周期进行更改。 根据本发明构思,当控制阀(6)处于冲击位置时,冲击装置设置有由控制阀和冲击活塞部分地界定的封闭空间。 冲击活塞(1)包括与所述空间连通并且具有比活塞的上端更大的直径的部分。 因此,控制阀和冲击活塞能够沿相同的方向移动,直到从该封闭空间向冲击活塞(1)的上端打开连接。
    • 4. 发明专利
    • JP2675036B2
    • 1997-11-12
    • JP50305487
    • 1987-05-14
    • B25B27/067B23B31/07B25B20060101B25B27/04B25D20060101B25D9/16
    • PCT No. PCT/SE87/00243 Sec. 371 Date Jan. 14, 1988 Sec. 102(e) Date Jan. 14, 1988 PCT Filed May 14, 1987 PCT Pub. No. WO87/06870 PCT Pub. Date Nov. 19, 1987.An impact apparatus, e.g. for moving portions (2, 3) of two elements (4, 5) away from each other by a wedge shaped tool (1), which is introducable between said portions, comprises a carrier (9), to which the tool is attached and which is movable relative to a body (10) of the apparatus. An impact member (11) is also movable relative to the body. A movement transmission device (12) acts between the carrier and a device (13) for activating such force influence on the impact member that it is caused to apply an impact on the carrier. The apparatus is so designed that when the carrier (9) is displaced due to actuation of the tool, the movement of the carrier is transferred via the transmission device to the activating device, which causes force influence on the impact member. The activating device (13) may be a valve for pressure fluid supply.