公开(公告)号：EP2626590A4

公开(公告)日：2018-04-18

申请号：EP11830555

申请日：2011-09-29

申请人： HITACHI CONSTRUCTION MACH CO

发明人： OKUNO NAOYUKI ,  KOMARU YUTAKA ,  NIIDOME TAKASHI

IPC分类号： F16D65/853 ,  B60T5/00 ,  E02F9/12 ,  F16D55/40 ,  F16D59/02 ,  H02K7/102

CPC分类号： F16D65/833 ,  B60T1/062 ,  B60T5/00 ,  B66C23/86 ,  E02F9/128 ,  F16D55/36 ,  F16D65/853 ,  F16D2055/0058 ,  F16D2065/783 ,  F16D2069/004 ,  F16D2121/06 ,  H02K7/102 ,  H02K7/116 ,  H02K9/19

摘要： A plurality of rotating side brake disks (47) and a plurality of non-rotating side brake disks (48) are arranged outside in the radial direction from a motor shaft (25) in a brake case (32) while alternately overlapping with each other. A frictional material (48B) is provided on the non-rotating side brake disk (48), and an oil groove (48F) is provided in a frictional engaging surface (48E) of this frictional material (48B). It is configured such that, when a braking force is applied by a brake piston (49) to the motor shaft (25), lubricant oil (59) flowing into the brake case (32) from a lubricant oil inlet port (40) flows from the outer diameter side to the inner diameter side between the rotating side brake disk (47) and the non-rotating side brake disk (48) only through the oil groove (48F). As a result, the lubricant oil (59) having flowed into the brake case (32) efficiently cools the frictional engaging surface (48E).

公开(公告)号：EP2540916A4

公开(公告)日：2017-03-15

申请号：EP11744539

申请日：2011-02-07

申请人： HITACHI CONSTRUCTION MACH CO

发明人： KOMARU YUTAKA ,  NIIDOME TAKASHI

IPC分类号： E02F9/12 ,  B66C23/84 ,  E02F9/20 ,  F16D55/36 ,  F16D65/853 ,  F16D121/06

CPC分类号： E02F9/2095 ,  E02F9/128 ,  F16D55/36 ,  F16D65/853 ,  F16D2121/06

摘要： An electric motor (21) is arranged on a reduction device (12), and a wet braking device (30) which gives braking force to a motor shaft (25) is arranged on an upper end side of the electric motor (21). The wet braking device (30) comprises: a brake case (31) which accommodates an upper end portion of the motor shaft (25); an adapter (36) which is detachably disposed to the motor shaft (25) in the brake case (31); a plurality of rotating side brake disks (39) and a plurality of non-rotating side brake disks (40) arranged on an outer peripheral side of the adapter (36); and a brake piston (41) which gives braking force to the motor shaft (25) by frictionally engaging the rotating side brake disks (39) and the non-rotating side brake disks (40) with each other. As a result, at the time of performing a maintenance operation for the wet braking device (30), the wet braking device (30) alone can be solely removed while keeping the electric motor (21) assembled to the reduction device (12).