公开(公告)号：EP1930198A4

公开(公告)日：2011-07-27

申请号：EP06810508

申请日：2006-09-25

Applicant: KUBOTA KK

Inventor： HIRAOKA MINORU ,  ISHIMORI SHOSO ,  KATAYAMA YOSHIYUKI

IPC: B60K17/08 ,  F16H37/08 ,  F16H47/04

CPC classification number: B60K17/08 ,  F16H47/04 ,  F16H2037/045 ,  F16H2037/088 ,  F16H2037/0886 ,  F16H2200/2005 ,  F16H2200/201 ,  F16H2200/2035

公开(公告)号：EP2116407A4

公开(公告)日：2011-03-16

申请号：EP07828350

申请日：2007-09-25

Applicant: KUBOTA KK

Inventor： HIRAOKA MINORU ,  TAKAO YOSHIROU ,  ANDOU MASARU

IPC: F16H47/04 ,  F16H37/04

CPC classification number: F16H47/04 ,  B60K2001/003 ,  F16H3/725 ,  F16H37/042 ,  F16H2037/044 ,  F16H2037/049 ,  F16H2037/088 ,  F16H2037/0886 ,  F16H2200/201 ,  F16H2200/2041

公开(公告)号：EP2618027A4

公开(公告)日：2018-04-18

申请号：EP11824822

申请日：2011-03-23

Applicant: KUBOTA KK

Inventor： HIRAOKA MINORU ,  HAYASHI ATSUSHI ,  ANDOU MASARU ,  HINO MASAKAZU

IPC: F16H47/04 ,  B60W30/18

CPC classification number: F16H47/04 ,  B60W30/18036 ,  F16H2037/023 ,  F16H2037/026 ,  F16H2037/044 ,  F16H2037/049 ,  F16H2037/0886

Abstract: Disclosed is a transmission apparatus for a tractor which is operable to transmit a forward drive force in a wide speed changing range to the traveling device and which is operable also to transmit a reverse drive force to the traveling device in an inexpensive manner and with good transmission efficiency. A planetary transmission section (30) is configured to output the forward drive force in whichever case a hydrostatic stepless speed changing section (11) is speed-changed to a forward rotation speed change state or a reverse rotation speed change state. A low speed transmission clutch (45) couples a low speed side speed changing gear (41), meshed with a low speed side output gear (31) of the planetary transmission section (30), to a counter shaft (44) to be rotatable therewith. A high speed transmission clutch (46) couples a high speed side speed changing gear (42), meshed with a high speed side output gear (32) of the planetary transmission section (30), to the counter shaft (44) to be rotatable therewith. An output shaft gear (48) is meshed with a counter gear (47) supported on the counter shaft (44) to be rotatable therewith. A reverse transmission clutch (52) couples a reverse transmission gear (51), meshed with the high speed side output gear (31), to an output shaft (43) to be rotatable therewith.

公开(公告)号：EP1930627A4

公开(公告)日：2011-07-06

申请号：EP06810507

申请日：2006-09-25

Applicant: KUBOTA KK

Inventor： KATAYAMA YOSHIYUKI ,  UEDA YOSHIHIRO ,  ISHIMORI SHOSO ,  HIRAOKA MINORU

IPC: F16H3/44 ,  F16H3/091 ,  F16H47/04

CPC classification number: F16H47/04 ,  F16H2037/088 ,  F16H2037/0886 ,  F16H2200/0043 ,  F16H2200/0095

公开(公告)号：EP2189683A4

公开(公告)日：2011-02-09

申请号：EP08722462

申请日：2008-03-19

Applicant: KUBOTA KK

Inventor： HIRAOKA MINORU ,  MACHIDA SATOSHI ,  KATAYAMA YOSHIYUKI

IPC: F16H47/04 ,  F16H3/093

CPC classification number: F16H47/04 ,  F16H3/18 ,  F16H2037/0886 ,  F16H2200/2007 ,  F16H2200/201 ,  F16H2200/2041

公开(公告)号：JP2003211991A

公开(公告)日：2003-07-30

申请号：JP2002011469

申请日：2002-01-21

Applicant: KUBOTA KK

Inventor： HIRAOKA MINORU ,  ANDO MASARU ,  TAKAO YOSHIRO

IPC: A01D69/00 ,  B60K17/28 ,  B60K20/00 ,  B60K20/02 ,  F16H61/26

Abstract: PROBLEM TO BE SOLVED: To provide a gear shift operation device having a simple structure and improved operation of a continuously variable transmission for running onto a lower speed side more than a set advance low speed, by utilizing a means for positioning an operation part of the continuously variable transmission to a neutral position. SOLUTION: A cam ball 33 is provided in the operation part 9d of the continuously variable transmission connected with and operating in the interlocking relationship with a gear shift lever, and a cam follower member 31 is fixed to an outer face side of a casing 9c of the continuously variable transmission. When the operation part 9d is operated to the neutral position n, the cam ball 33 enters a neutral recessed part 35 of the cam follower member 31, and the cam ball 33 and the cam follower member 31 are mutually engaged to position the operation part 9d to the neutral position n. When the operation part 9d comes to a low speed side more than a set low speed position f0 on an advance side, the cam ball 33 opposes to and comes into contact with an inclined cam face 36 of the cam follower member 31, and the inclined cam face 36 acts on the cam ball 33 to move and energize the operation part 9d to the set low speed position f0. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002295639A

公开(公告)日：2002-10-09

申请号：JP2001099651

申请日：2001-03-30

Applicant: KUBOTA KK

Inventor： UCHI TAKAHIRO ,  NORITA SEIJI ,  HIDA SADANORI ,  HIRAOKA MINORU ,  NAKADA MASAYOSHI

IPC: B60K17/10 ,  F16H47/02 ,  F16H57/02 ,  F16H57/023 ,  F16H57/04

Abstract: PROBLEM TO BE SOLVED: To provide a transmission structure capable of reducing the size and costs of a work machine. SOLUTION: In this transmission structure for the work machine, power from an engine 7 is transmitted to a traveling device 1 via a hydrostatic continuously variable transmission device 9 and a traveling transmission system 11 built in a transmission case 8; a recess part 29 recessed inward is formed on a sidewall 28 in the transmission case 8, and a piston pump 30 and a piston motor 31 are housed in the recess part 29. When a port block 34, in which oil passages 32 and 33 connecting the piston pump 30 and the piston motor 31 together are formed, is connected to the sidewall 28 to close the recess part 29, the port block 34 is positioned at the outside of the transmission case 8, while the hydrostatic continuously variable transmission device 9 is inserted into the inside of the transmission case 9.

公开(公告)号：JP2002295638A

公开(公告)日：2002-10-09

申请号：JP2001099650

申请日：2001-03-30

Applicant: KUBOTA KK

Inventor： UCHI TAKAHIRO ,  NORITA SEIJI ,  HIDA SADANORI ,  HIRAOKA MINORU ,  NAKADA MASAYOSHI

IPC: A01D67/00 ,  A01B63/10 ,  B62D11/08 ,  F16H47/02 ,  F16H47/04

Abstract: PROBLEM TO BE SOLVED: To provide a transmission structure capable of reducing the size and costs of a work machine. SOLUTION: A recess part 29 is formed on a sidewall 28 in a transmission case 8, and a piston pump 30 and a piston motor 31 are housed in the recess part 29; and by having a port block 34, in which oil passages 32 and 33 connecting the piston pump 30 and the piston motor 31 together are formed, is connected to the sidewall 28 close the recess part 29, a hydrostatic continuously variable transmission device 9 is inserted into the inside of the transmission case 8. A hydraulic pump 21 arranged in the transmission case 8 is connected via a pressure reducing valve 44 to the hydrostatic continuously variable transmission device 9, to be used for charging it and is connected to an oil pressure circuit in a steering device 13 via a relief valve 23; and set pressure of the relief valve 23 is set to be higher than that of the pressure reducing valve 44, and returned oil of the relief valve 23 is supplied to the hydrostatic continuously variable transmission device 9 so as to be used as cooling oil.

公开(公告)号：JP2002295637A

公开(公告)日：2002-10-09

申请号：JP2001099649

申请日：2001-03-30

Applicant: KUBOTA KK

Inventor： UCHI TAKAHIRO ,  NORITA SEIJI ,  HIDA SADANORI ,  HIRAOKA MINORU ,  NAKADA MASAYOSHI

IPC: A01D69/06 ,  F16H47/02 ,  F16H57/028 ,  F16H57/029 ,  F16H57/03 ,  F16H57/04 ,  F16H57/02

Abstract: PROBLEM TO BE SOLVED: To provide a transmission structure capable of reducing the size and costs of a work machine. SOLUTION: In this transmission structure for the work machine, engine power is transmitted to a traveling device 1 via a hydrostatic continuously variable transmission device 9 and a traveling transmission system 11 built in a transmission case 8. A recess part 29 is formed on a sidewall 28 in the transmission case 8, and a piston pump 30 and a piston motor 31 are housed in the recess part 29; and by having a port block 34, in which oil passages 32 and 33 connecting the piston pump 30 and the piston motor 31 together are formed, is connected to the sidewall 28 close the recess part 29, the hydrostatic continuously variable transmission device 9 is inserted into the inside of the transmission case 9. In the transmission case 8, a partition wall 60, defining a reservoir part 59 for storing transmission oil churned up by a transmission gear 58 arranged in the lower part of the transmission case 8 in the vicinity of the bottom part of the transmission case 8 is installed, and the transmission oil in the reservoir part 9 is supplied to the hydrostatic continuously variable transmission device 9.

公开(公告)号：JP2002187443A

公开(公告)日：2002-07-02

申请号：JP2000388288

申请日：2000-12-21

Applicant: KUBOTA KK

Inventor： HIRAOKA MINORU

IPC: A01B69/00 ,  A01D69/00 ,  B60K17/10

Abstract: PROBLEM TO BE SOLVED: To obtain a compact transmission device for driving a working machine which can drive the right and left traveling devices individually and independently by two pairs of hydrostatic continuously variable transmissions. SOLUTION: The two pairs of the hydrostatic continuously variable transmissions 30 and 40 are mounted to one of the right and left side walls 15a of a transmission case 10 to which a pair of the right and left axles 13a and 13b are laid across. An output shaft 42 of the two pairs of the hydrostatic continuously variable transmissions is interlocked and connected to the right and left axles 13a and 13b individually and independently by interlocking mechanisms 50.