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公开(公告)号：EP0612892A4
公开(公告)日：1995-11-22
申请号：EP92923182
申请日：1992-11-06
申请人： KOMATSU MFG CO LTD
发明人： KIMOTO KENZO , YANAGISAWA MASAKAZU
CPC分类号： F16F1/3732 , B62D27/04 , B62D33/0604 , E02F9/166 , F16F13/08
摘要： A shock absorbing device provided with a damping plate damper comprises a viscosity damper including: a case body consisting of an upper flange, a body portion and a lower flange; a resilient member provided with a collar, an outer surface of a body portion thereof and the undersurface of a collar portion thereof being connected to the above-described case body; a center shaft connected to the central portion of the resilient member provided with the collar; a damping plate fixed to the bottom end portion of the center shaft; and a viscous substance filled up in a damper case fixed to the bottom end of the above-described case body. An operator cabin of a construction machine is resiliently supported on a machine body through this shock absorbing device. For this reason, the number of natural vibration of the operator cabin during high speed running of a hydraulic power shovel is increased, whereby resonnance thereof with the mesh-up frequencies by a caterpillar band and a sprocket wheel is avoided, so that effective damping effects can be achieved against the number of vibrations applied in wide ranges by the construction machines and the like, thus improving riding comfort for an operator and the mechanical strength of the operator cabin.
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公开(公告)号：EP0840008A4
公开(公告)日：1999-03-24
申请号：EP95939407
申请日：1995-12-08
申请人： KOMATSU MFG CO LTD
发明人： NAGAOKA KOU , KIMOTO KENZO
摘要： When an on/off operation selectable external indicating means (30) is switched to ON, since a control device (10) changes over a solenoid valve (26) to a position (26), the oil pressure of a pilot pump (3) is caused to act on an operating portion (24c) of a switching valve (24) and a pressing member (7d) of a cut-off valve (7). Oil drained from a head chamber (4A ) of a servo piston (4) for controlling a swash plate angle of a variable displacement hydraulic pump (2) is caused to pass through a throttle portion (25a) of a slow return valve (25) due to changing over of the switching valve (24), the reduction speed of the swash plate angle is delayed, and the absorption horsepower of the hydraulic pump (2) is increased with good response. In addition, since the oil pressure of the pilot pump (3) maintains the cut-off valve (7) at a position (7a) even against the high discharge pressure of the hydraulic pump (2), the cut-off function can be kept halted.
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