公开(公告)号：US4918918A

公开(公告)日：1990-04-24

申请号：US251220

申请日：1988-07-25

申请人： Kenichi Miki ,  Yoichiro Kotake

发明人： Kenichi Miki ,  Yoichiro Kotake

IPC分类号： F04B1/26 ,  F03C1/06 ,  F04B1/30 ,  F04B1/32

CPC分类号： F04B1/324

摘要： A variable displacement piston machine includes a valve plate (3) provided with high-pressure and low-pressure ports (5, 6) to supply and discharge fluid into and from piston chambers (80) in a cylinder block (2) and first and second control ports (P1, P2) disposed in opposite directions between the ports; a pivotable inclined swash plate (4) to adjust the stroke of pistons 1 in the piston chambers (80); and a feedback valve (100) having a second spool actuated by pressure of fluid introduced into an introduction passage (41) with a throttle valve (42), and a first spool (S1) slidably fitted in the second spool (S2). The second spool (S2) causes first and second control ports (P1, P2) to communicate with the high-pressure port (5) and tank passage (53), respectively, thereby causing the pistons (1) to incline the swash plate (4) toward its neutral position while the first spool (S1) connected to the swash plate (4 ) through a link (8) connects the control ports with the tank passage and high-pressure port, respectively, in a reverse manner to the second spool, to perform a feedback of the inclining motion of the swash plate (4). This machine avoids the use of an operating plunger, accomplishing stable control of the swash plate (4), sets a moving speed of the second spool (S2), i.e. the swash plate (4) arbitrarily by adjusting the throttle valve (42), and prevents shock when the swash plate position is switched.

公开(公告)号：US6050173A

公开(公告)日：2000-04-18

申请号：US91839

申请日：1998-06-25

申请人： Toshiyuki Sakai ,  Yoichiro Kotake ,  Toshihiro Naruse ,  Masaaki Suhara

发明人： Toshiyuki Sakai ,  Yoichiro Kotake ,  Toshihiro Naruse ,  Masaaki Suhara

IPC分类号： F03C1/04 ,  F03C1/247 ,  F03C1/40 ,  F01B1/06 ,  F03C1/36

CPC分类号： F03C1/045

摘要： A cam motor apparatus A is configured such that a cylinder block (2) rotating together with an output shaft (10) is internally provided with a plurality of cylinders (5, 5, . . . ) formed radially in a direction orthogonal to a rotational axis (X) of the cylinder block (2) and pistons (6) respectively housed in the cylinders are reciprocated by the action of working oil distributed thereto by a distribution valve (7) thereby rotating the output shaft. The cam motor apparatus A further includes a selector valve (9) for selectively communicating each of the cylinders with a supply passage (81) or a discharge passage (82) for working oil through the distribution valve. When the selector valve is in a low rotational speed position, working oil is supplied to and discharged from all the cylinders. On the other hand, when the selector valve is changed into a high rotational speed position, working oil is supplied to and discharged from a half of the cylinders and pressurized oil is supplied from a charging pump (16) to the remaining cylinders.

摘要翻译： PCT No.PCT / JP97 / 03986 Sec。 371日期：1998年6月25日第 102（e）日期1998年6月25日PCT 1997年10月30日PCT公布。 出版物WO98 / 20255 日期1998年5月14日凸轮马达装置A构造成使得与输出轴（10）一起旋转的气缸体（2）内部设置有多个圆筒（5,5 ...） 与气缸体（2）的转动轴线（X）正交并分别容纳在气缸中的活塞（6）通过分配阀（7）分配到其上的工作油的作用而往复运动，从而使输出轴旋转。 凸轮电动机装置A还包括用于选择性地将每个气缸与用于通过分配阀工作油的供给通道（81）或排出通道（82）连通的选择阀（9）。 当选择阀处于低转速位置时，工作油被供给到所有气缸并从其排出。 另一方面，当选择阀改变为高转速位置时，向一半气缸供给工作油并将其从其中排出，并将加压油从充气泵（16）供应到其余气缸。