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1. 发明专利

JP2001349322A BEARING DEVICE 失效
公开(公告)号：JP2001349322A
公开(公告)日：2001-12-21
申请号：JP2000171884
申请日：2000-06-08
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TAMURA MORIO , SAKUMA NORIMITSU , ITSUKIDA OSAMU , HIDA NOBUYUKI , SHIMAKURA SHUNSUKE , AKITA HIDEKI
IPC分类号： E02F9/00 , F16C11/04 , F16C33/10
摘要： PROBLEM TO BE SOLVED: To heighten the workability in manufacturing and machining by preventing backlash in the thrust direction between a boss and a bracket by utilizing pressure of oil liquid and simplifying the structure. SOLUTION: The end face 22A of the boss 22 is provided with a first thrust ring 26, and the end face 24B of the bracket 24 is provided with a second thrust ring 27. The thrust ring 27 is slidably fitted in the thrust ring 26, thereby forming right and left oil chambers 28 between the thrust rings 26 and 27. The right and left oil chambers 28 and 28 communicate with each together by a grease supply passage 32. The grease is sealed in the oil chamber 28, the thrust ring 26 is pressed to the end face 22A of the boss 22 by pressure of the grease, and the thrust ring 27 is pressed to the end face 24B of the bracket 24.

2. 发明专利

JP2001330024A BEARING DEVICE 失效
公开(公告)号：JP2001330024A
公开(公告)日：2001-11-30
申请号：JP2000151369
申请日：2000-05-23
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI
IPC分类号： E02F9/00 , F16C11/04 , F16C27/02
摘要： PROBLEM TO BE SOLVED: To reduce a vibration occurring between pin holes on a bracket side and a connection pin by suppressing the rattling of the connection pin in the pin hole. SOLUTION: The pin holes on the right and left brackets 25 forming a bearing device 21 are formed as stepped pin holes each comprising a pin insert hole part 25A and a diameter increased hole part 25B. Also, the connection pin 26 is installed by inserting both sides of a pin shaft part 26A into the pin insert hole part 25A of the bracket side pin hole 25, and a small diameter shaft part 26C is inserted into the diameter increased hole part 25B. Then, an elastic tube body 27 is provided in the diameter increased hole part 25B of the bracket side pin holes 25, and the connection pin 26 is elastically supported by the elastic tube body 27. In addition, a radial clearance S1 smaller than the maximum amount of elastic deformation of the elastic tube body 27 is provided between the pin shaft part 26A of the connection pin 26 and the pin insert hole part 25A.

3. 发明专利

JP2001039360A CRAWLER BELT SEAL DEVICE 失效
公开(公告)号：JP2001039360A
公开(公告)日：2001-02-13
申请号：JP21794299
申请日：1999-07-30
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： HATANO KAZUYOSHI , SHIMAKURA SHUNSUKE , AKITA HIDEKI , SUGIYAMA GENROKU , IDEZU WATARU , SEKIGUCHI YOSHIAKI
IPC分类号： B62D55/21
摘要： PROBLEM TO BE SOLVED: To excellently stabilize the seal performance for a long time while improving the durability of a seal in relation to a load in the compressing direction. SOLUTION: This crawler belt seal device is formed of an annular seal 22 having a nearly H-shaped cross section and formed of annular side piece parts 22A, 22B brought in contact with an end surface of an outside link and an end surface of a bush and an annular intermediate connecting part 22C connected to the side piece parts 22A, 22B and for bringing these side piece parts 22A, 22B in pressure-contact with the end surface of the outside link and the end surface of the bush.

4. 发明专利

JPH09273539A BEARING DEVICE 失效
公开(公告)号：JPH09273539A
公开(公告)日：1997-10-21
申请号：JP10451796
申请日：1996-04-02
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI , TAMURA MORIO , SHIMAKURA SHUNSUKE , HIDA NOBUYUKI
IPC分类号： E02F9/00 , F16C11/04 , F16C33/04 , F16C33/20
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of abrasion and damage between connection pins and brackets and compensate smooth relative rotation between boss members and the brackets. SOLUTION: Boss-side bushs are press-fitted to an inner peripheral side of an arm boss 18, while a pair of brackets 11 are arranged so as to sandwich the arm boss 18 from both sides in an axial direction. A self-lubricant bracket side bush 21 is press-fitted into each bracket 11. Connection pins 22 are inserted into pin through holes 19A, 21B of the bushes 19 and 21 for boss side and bracket side, for rotatably connecting the arm boss 18 to the brackets 11.

5. 发明专利

JPH09151482A BEARING DEVICE 失效
公开(公告)号：JPH09151482A
公开(公告)日：1997-06-10
申请号：JP32800095
申请日：1995-11-22
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： HATANO KAZUYOSHI , OGASAWARA MANABU , AKITA HIDEKI
IPC分类号： E02F9/00 , F16C17/04
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a noise such as a squeak at the time of rotating a bracket part relative to a boss part, and maintain comfortable work environment. SOLUTION: Each thrust plate 19 is formed out of an abrasion resistance material or the like having a self-lubricating function and laid in the space of each gap formed between an arm boss 13 and each bracket 14. Also, a gap is formed between each thrust plate 19 and the slide surface 13B of an arm boss 13, and between each thrust plate 19 and the slide surface 14D of each bracket 14. In this case, each gap size is set at a value between 0.5mm and 3.5mm in the axial direction of a joint pin 16, thereby enabling each thrust plate 19 to independently rotate relatively for the slide surfaces 13B and 14D at the time of relatively turning a bucket 8 for an arm 7.

6. 发明专利

JP2003222133A SINTERED OILLESS SLIDING BEARING 审中-公开
公开(公告)号：JP2003222133A
公开(公告)日：2003-08-08
申请号：JP2002022248
申请日：2002-01-30
申请人： HITACHI POWDERED METALS , HITACHI CONSTRUCTION MACHINERY
发明人： MIYASAKA MOTOHIRO , MARUYAMA KAZUO , MOGAMI MICHIHARU , KOBAYASHI JUNICHI , AKITA HIDEKI , ITSUKIDA OSAMU
IPC分类号： F16C33/10 , F16C33/12 , F16C33/14
摘要： PROBLEM TO BE SOLVED: To provide a bearing for minimizing a finishing process with cutting and grinding and having bearing characteristics comparable to those of the conventional one in a sintered oilless sliding bearing where a high contact pressure is applied. SOLUTION: The sintered oilless sliding bearing comprises a porous iron sintered alloy of quenched structure, in which a plurality of unevenness stripes of 2 to 12.5 μm in difference of elevation expanding in the circumferential direction are arranged in parallel to form swells in the axial direction by cutting the inner perimeter, as well as the part of 10 to 60 μm in depth from the surface of the inner perimeter is compacted, and pores open to the surface are made 1 to 10 area % by closing the surface pores for usage of 6 kgf/mm 2 in surface pressure and 2 to 5 cm/s in sliding speed. COPYRIGHT: (C)2003,JPO

7. 发明专利

JP2002155922A BEARING DEVICE 失效
公开(公告)号：JP2002155922A
公开(公告)日：2002-05-31
申请号：JP2000351682
申请日：2000-11-17
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI , ITSUKIDA OSAMU
IPC分类号： E02F9/00 , F16C11/04 , F16C17/02 , F16C17/04 , F16C33/74
摘要： PROBLEM TO BE SOLVED: To reduce wear, abnormal sounds or the like between a boss and brackets. SOLUTION: Fixed bushes 23 are fixedly provided in a bush fitting hole 22A of the boss 22. Movable bushes 27 and 28 are provided movably in an axial direction in bush fitting holes 25A and 26A of the brackets 25 and 26. A connecting pin 29 is inserted through inner circumference sides of the fixed bushes 23 and inner circumference sides of the movable bushes 27 and 28. The connecting pin 29 is held in a detent state to be bracket 126 by engaging a collar part 29B to an engagement bolt 30 of bracket 25 and 26 sides. An elastic ring 32 is provided in a one end side outer circumference of the connecting pin 29, and end faces 27A and 28A of the movable bushes 27 and 28 are respectively pressed resiliently toward end faces 23A of each fixed bush 23 by fastening a fastening nut 31 toward an elastic ring 32 side.

8. 发明专利

JP2000095156A GUIDE ROLLER UNIT FOR TRACKED VEHICLE 失效
公开(公告)号：JP2000095156A
公开(公告)日：2000-04-04
申请号：JP28599798
申请日：1998-09-22
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI , SAKUMA NORIMITSU
IPC分类号： B62D55/15 , F16C33/72 , F16J15/32 , F16J15/3232 , F16J15/3264
摘要： PROBLEM TO BE SOLVED: To keep smooth rotation of a turning wheel even when the turning wheel constituting the guiding roller of a tracked vehicle is temporarily deformed. SOLUTION: A thrust ring 18 is disposed between a flange portion 17B5 of an oil seal 17 (seal 17B at rotation side) in contact with the end surface of the turning wheel 14. The thrust ring 18 regulates axial movement of the seal 17B at rotating side so as to prevent the oil seal 17 from falling out of the turning wheel 14. The above structure prevents the oil seal 17 from falling out of the turning wheel 14 through the thrust ring 18 even if the turning wheels 14 are temporarily deformed in the state where the tracked vehicle runs over rocks, for example. This may prevent leakage of lubricant oil 16 sealed within the turning wheel 14 to the outside, and allow smooth rotation of the turning wheel for an extended period.

9. 发明专利

JPH09279627A BEARING DEVICE 失效
公开(公告)号：JPH09279627A
公开(公告)日：1997-10-28
申请号：JP11563496
申请日：1996-04-12
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI
IPC分类号： E02F9/00 , F16C17/10
摘要： PROBLEM TO BE SOLVED: To easily align a pin insertion hole of a bracket with a pin insertion hole of a boss when the bracket is coupled to the boss through a connection pin. SOLUTION: Each thrust plate 21 is formed from sintered oil containing alloy into an annular shape, and the plate 21 is detachably mounted to the outer end surface of each boss 12 in such is manner that a guide hole 22 is coaxially positioned with respect to a pin insertion hole 19A of a bush 19 provided in an arm boss 11. Each holding bolt 29 is screwed into a threaded hole 16D of each bracket 16 to movably hold each movable plate 25 with respect to the bracket 16 through the bolt 29. Further, the guide hole 22 of the plate 21 and a fitting protrusion 25B of the plate 25 each have a tapered portion. Thus, the protrusion 25B can be advanced into the guide hole 22 through the bolt 29 so as to be firmly fitted therein.

10. 发明专利

JPH09273538A BEARING DEVICE 失效
公开(公告)号：JPH09273538A
公开(公告)日：1997-10-21
申请号：JP10451696
申请日：1996-04-02
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI
IPC分类号： E02F9/00 , F16C11/02 , F16C11/04 , F16C33/04 , F16C33/10 , F16C33/20
摘要： PROBLEM TO BE SOLVED: To surely improve operability in mounting and demounting and improve maintenance property such as adjustment of a gap with certainty by easily inserting connection pins into a boss and each bracket. SOLUTION: A bush 21 is press-fitted into each of boss cylinders 20 arranged on both sides of an arm boss 18. A pair of brackets 11 is arranged so as to sandwich the arm boss 18 from both sides in an axial direction. First and second connection pins 23 are inserted into pin through-holes 11B of the brackets 11. A tapered portion 23A on the side of a leading end of the connection pin 23 is slidably inserted into a tapered hole 21A of the bush 21. The connection pin 23 is fixed to the bracket 11 through a flange 23C by means of a fixation bolt 24. The arm boss 18 is rotatably connected to the bracket 11.

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