公开(公告)号：US20230271497A1

公开(公告)日：2023-08-31

申请号：US18143784

申请日：2023-05-05

Applicant: KUBOTA CORPORATION

Inventor： Tomonari TSUCHIDA ,  Ryoma IWASE ,  Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hidetoshi HANA

IPC: B60K17/354 ,  B60K17/28 ,  F16H47/08 ,  F16H57/02 ,  F16H57/037 ,  F16H57/04

CPC classification number: B60K17/354 ,  B60K17/28 ,  F16H47/08 ,  F16H57/02 ,  F16H57/037 ,  F16H57/0424 ,  F16H57/0456 ,  B62D49/06

Abstract: A traveling transmission device of a tractor including a transmission case to which power from an engine is inputted via an input shaft, a speed changer transmission section provided inside the transmission case and configured to input power from the input shaft and to speed-change the inputted power and output it, and a rear wheel differential mechanism provided inside the transmission case and configured to input power outputted from the speed changer transmission section and transmit the inputted power to left and right rear wheels. The speed changer transmission section includes a plurality of speed changer sections configured to speed-change power from the input shaft by a gear coupling mechanism and a multiple-disc clutch and output it, and, inside the transmission case, an oil feeding pipe extends upwardly of the speed changer transmission section and a discharge nozzle connects to respective portions of the plurality of speed changer sections.

公开(公告)号：US20210094416A1

公开(公告)日：2021-04-01

申请号：US17028372

申请日：2020-09-22

Applicant: KUBOTA CORPORATION

Inventor： Tomonari TSUCHIDA ,  Ryoma IWASE ,  Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hidetoshi HANA

IPC: B60K17/354 ,  F16H47/08 ,  F16H57/037 ,  F16H57/04 ,  B60K17/28 ,  F16H57/02

Abstract: Provided are a speed changer device, a forward/reverse switchover device for converting output of the speed changer device into forward traveling power and reverse traveling power, a rear wheel differential mechanism for inputting output of the forward/reverse switchover device and transmitting it to rear wheels, and a gear transmission mechanism for transmitting power of an output shaft of the forward/reverse switchover device to an input shaft of the rear wheel differential mechanism. A transmission case is separable into a front case portion accommodating the speed changer device and a rear case portion accommodating the forward/reverse switchover device, the rear wheel differential mechanism and the gear transmission mechanism. The gear transmission mechanism is detachably provided at a portion of the inside of the transmission case which portion corresponds to a front end portion of the rear case portion.

公开(公告)号：US20230204093A1

公开(公告)日：2023-06-29

申请号：US17987296

申请日：2022-11-15

Applicant: KUBOTA CORPORATION

Inventor： Tomonari TSUCHIDA ,  Ryoma IWASE ,  Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hiroyuki AIKAWA

IPC: F16H57/02 ,  F16H37/08 ,  F16H57/04

CPC classification number: F16H57/02 ,  F16H37/0813 ,  F16H57/0408 ,  F16H1/28

Abstract: There is provided a work vehicle including an oil outlet port and a partition part. The oil outlet port opens to a bottom portion in one end side of a transmission case in a vehicle body front-back direction and a vehicle body left-right direction. The oil outlet port takes out a lubricating oil from an interior of the transmission case. The partition part divided an internal space of the transmission case into a first space zone along a sidewall portion of the transmission case, and a second space zone other than the first space zone. The partition part brings the first space zone into a sealed state.

公开(公告)号：US20220205526A1

公开(公告)日：2022-06-30

申请号：US17525262

申请日：2021-11-12

Applicant: KUBOTA CORPORATION

Inventor： Tomonari TSUCHIDA ,  Atsuro HAYAMI ,  Hiroyuki SADAMOTO ,  Keitaro MORINAGA ,  Kazuhiro WADA ,  Rikuto ARAKI ,  Ryoma IWASE ,  Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hiroyuki AIKAWA

IPC: F16H57/021 ,  F16H57/04

Abstract: A power transmission device for a work vehicle includes a transmission case, a gear transmission housed in the transmission case and configured to transmit power to a travel device, and a transmission gear provided in the gear transmission in a state of sitting in lubricating oil stored in an internal space of the transmission case, the transmission case being provided with a wall part supporting a support shaft of the transmission gear in a state of being adjacent to the transmission gear, and the wall part being provided with a cover part protruding toward the outer periphery of the transmission gear from the wall part and covering the transmission gear.

公开(公告)号：US20210404534A1

公开(公告)日：2021-12-30

申请号：US17340751

申请日：2021-06-07

Applicant: KUBOTA CORPORATION

Inventor： Tomonari TSUCHIDA ,  Ryoma IWASE ,  Tomoyuki TANAKA ,  Takahiro MATSUO

IPC: F16H1/46 ,  F16H1/28 ,  F16H57/08 ,  F16H57/04

Abstract: A carrier includes a first carrier portion and a second carrier portion. The first carrier portion includes a gear housing space that houses a planetary gear, an opening that opens the gear housing space toward the second carrier portion and allows the planetary gear to fit into the gear housing space, and a first support hole that supports a first end portion of the planetary support shaft. The second carrier portion includes a cover portion that covers the opening, a second support hole that supports a second end portion of the planetary support shaft, and a joining portion that detachably joins the second carrier portion to the first carrier portion. The joining portion is joined to the first carrier portion by being tightened in a direction aligned with a direction of an axial core of a sun gear.

公开(公告)号：US20240418256A1

公开(公告)日：2024-12-19

申请号：US18739376

申请日：2024-06-11

Applicant: Kubota Corporation

Inventor： Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hiroyuki AIKAWA ,  Atsuro HAYAMI ,  Sota KITAMURA ,  Takuma HOKEGUCHI

IPC: F16H57/04 ,  F16H37/08

Abstract: A transmission case contains a first power transmission shaft, a second power transmission shaft below the first power transmission shaft, a first power transmission gear attached to the first power transmission shaft, and a second power transmission gear attached to an end of the second power transmission shaft and meshing with the first power transmission gear at a meshing portion. A first cover covers a portion of the second power transmission gear on a first side opposite to a second side toward which the second power transmission shaft protrudes, and covers the end of the second power transmission shaft. A second cover covers a radially outward portion of the second power transmission gear except for the meshing portion.

公开(公告)号：US20230417313A1

公开(公告)日：2023-12-28

申请号：US18137492

申请日：2023-04-21

Applicant: KUBOTA CORPORATION

Inventor： Tomonari TSUCHIDA ,  Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hiroyuki AIKAWA ,  Kazuhiro WADA

IPC: F16H57/031

CPC classification number: F16H57/031 ,  F16H2057/02056

Abstract: A work vehicle including: a transmission configured to receive motive power input from a motive power source, and shift and output the input motive power to a travel device; a transmission case housing the transmission; and a gear pair disposed in the transmission, in a bottom section of an internal space of the transmission case, and including (i) a first power transmission gear configured to rotate about a first rotation axis, and (ii) a second power transmission gear configured to mesh with the first power transmission gear and rotate about a second rotation axis that is parallel with the first rotation axis. The work vehicle further includes at least one gear cover covering the first power transmission gear and the second power transmission gear.

公开(公告)号：US20230204096A1

公开(公告)日：2023-06-29

申请号：US17987327

申请日：2022-11-15

Applicant: KUBOTA CORPORATION

Inventor： Atsushi JINNAI ,  Tomonari TSUCHIDA ,  Ryoma IWASE ,  Tomoyuki TANAKA ,  Takahiro MATSUO ,  Hiroyuki AIKAWA ,  Atsuro HAYAMI ,  Keitaro MORINAGA ,  Yosui NISHIJIMA ,  Satoru NAGANO ,  Takuma HOKEGUCHI

IPC: F16H57/04 ,  F16H57/037 ,  B60K17/28

CPC classification number: F16H57/0483 ,  F16H57/0435 ,  F16H57/0423 ,  F16H57/037 ,  F16H57/0457 ,  F16H57/0453 ,  F16H57/0445 ,  B60K17/28 ,  B62D49/06

Abstract: There is provided a work vehicle including a partition wall to keep partition between a first space zone as part of an internal space of the transmission case in which a differential mechanism is located and a second space zone as part of the internal space which is adjacent to the first space zone. An upper space is disposed above the partition wall and configured to allow lubricating oil scooped up from the first space zone by a ring gear to flow in the second space zone. A flow-out path is disposed below the upper space and configured to allow the lubricating oil to flow out of the second space zone to the first space zone.