公开(公告)号：EP0982170A4

公开(公告)日：2002-10-24

申请号：EP98919592

申请日：1998-05-13

申请人： YANMAR AGRICULT EQUIP ,  SEIREI IND

发明人： OHYA TERUMITSU ,  SHIMADA TAKANOBU

IPC分类号： B60K17/10 ,  B62D11/10 ,  B62D55/06

CPC分类号： B62D11/10 ,  B60K17/105 ,  Y10T74/19149

摘要： A drive unit provided with a power transmission path interlockingly connecting an engine (E) to left and right sprockets (12L, 12R), which are adapted to drive left and right crawlers (11) of left and right traveling parts (1L, 1R), via a non-stage traveling transmission (21) and an auxiliary traveling transmission unit (28) capable of changing the speed of a working vehicle in a plurality of stages. The power transmission path is provided with a non-stage steering transmission (20), left and right steering transmission units (48L, 48R) and left and right planetary gears (40L, 40R) all of which are adapted to be operated for speed change in accordance with a turning operation of a steering wheel (7). This construction enables a pivot turn and a spin turn of a working vehicle body to be made, the swinging performance of the working vehicle to be improved, the maneuvering of the vehicle to be done easily, and the construction of the drive unit to be simplified. It also becomes possible for the vehicle body to travel in a speed range which cannot be covered by the non-stage traveling transmission alone, and reduce the fuel consumption by lowering an output rotational frequency of the non-stage traveling transmission during a high-speed travel of the vehicle on a road.

公开(公告)号：EP0850555A4

公开(公告)日：2004-06-23

申请号：EP96926006

申请日：1996-08-05

申请人： YANMAR AGRICULT EQUIP ,  SEIREI IND

发明人： FUJIKI KATSUMI ,  SHIMADA TAKANOBU ,  TOGAMI SHUICHI

IPC分类号： A01B63/10 ,  B60K17/10 ,  B60K20/00 ,  B60K25/00 ,  B60K26/00 ,  E02F9/20 ,  F16H59/02 ,  F16H59/08 ,  F16H61/70

CPC分类号： B60K20/00 ,  A01B63/1006 ,  B60K17/10 ,  B60K25/00 ,  B60K26/00 ,  B60Y2200/411 ,  E02F9/2004 ,  F16H59/02 ,  F16H61/70 ,  F16H2059/088 ,  H01H2009/066 ,  Y10T74/20 ,  Y10T74/20612

摘要： One operating lever is provided for moving a traveling vehicle with a working machine back and forth and the working machine vertically and operating a sub-transmission, and a sub-transmission switch (37) is provided in a recessed portion (30b) formed in a grip (30a) of a back-and-forth operating lever (30) so that a quick operation can be effected by a single hand without any mistake. In addition, the working machine vertically moving lever (32) is constructed so as to interlock with a spool of a vertical motion control valve via a motor so that the speed of the motor is gradually reduced when the working machine vertically moving lever (32) is in a lowering operation, whereby a drastic lowering is prevented.

公开(公告)号：EP0931715A4

公开(公告)日：2001-03-14

申请号：EP96930414

申请日：1996-09-13

申请人： YANMAR AGRICULT EQUIP ,  SEIREI IND

发明人： SHIMADA TAKANOBU ,  FUJIKI KATSUMI ,  HIROSHIGE KOUICHI

IPC分类号： B62D11/18 ,  B62D11/04 ,  B60K17/28 ,  F16H37/06

CPC分类号： B62D11/183

摘要： A pump operating unit (40) is provided in an operating section for controlling the steering and speed change of travelling sections (1L, 1R) connected interlockingly to a pair of variable flow rate control pumps (PL, PR) via link mechanisms (NL, NR) for a spool, and operated by a steering mechanism (33) and a speed changing mechanism (37). Accordingly, the natural vibration occurring in the variable flow rate control pumps (PL, PR) is absorbed by the link mechanisms (NL, NR), and hence the vibration transmitted to the pump operating unit (40) is attenuated. The propagation of the vibration to the steering mechanism (33) and speed changing mechanism (37), which are interlockingly connected to the pump operating unit (40), is prevented.