# US 9,003,908 B2 · Working vehicle

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- Number: US 9,003,908 B2
- Document ID: US9003908B2
- Status: Granted
- Kind: B2
- Application number: 14/024,455
- Filed: 2013-09-11
- Published: 2014-03-20
- Granted: 2015-04-14
- Earliest claimed: 2012-09-14
- Assignees: Iseki & Co., Ltd.
- Applicants: Iseki & Co., Ltd.
- Inventors: Noboru Sagawa; Takashi Wakino; Fumiaki Nishikawa; Tatsuzo Murakami; Satoru Kinoshita
- Web page: https://patentgrep.com/patent/US9003908B2

## CPC

- B60K 17/08: of mechanical type
- B60K 20/00: Arrangement or mounting of change-speed gearing control devices in vehicles
- F16H 3/093: with two or more countershafts
- F16H 37/043: {without gears having orbital motion}
- F16H 59/02: Selector apparatus
- F16H 63/44: Signals to the control unit of auxiliary gearing
- F16H 2037/044: {comprising a separate gearing unit for shifting between forward or reverse}
- F16H 2037/045: {comprising a separate gearing unit for shifting between high and low ratio range}
- F16H 2059/0256: {Levers for forward-reverse selection only, e.g. for working machines having a separate lever for switching between forward and reverse mode}
- Y10T 74/19074: Single drive plural driven
- Y10T 74/19251: Control mechanism
- Y10T 74/20073: Control of plural mechanisms [e.g., control of transmission and control of 4 - wheel drive]
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F16H: GEARING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

According to one embodiment, a working vehicle includes: a main change speed mechanism configured to transmit a rotating power, generated by a power source; a first auxiliary change speed mechanism configured to transmit the rotating power, transmitted through the main change speed mechanism, to drive wheels; a second auxiliary change speed mechanism configured to transmit the rotating power to the drive wheels; a first lever configured to operate the first auxiliary change speed mechanism to perform a first auxiliary shift operation; and a second lever configured to operate the second auxiliary change speed mechanism to perform a second auxiliary shift operation, wherein: the first auxiliary change speed mechanism is activated when the second auxiliary change speed mechanism in a neutral state; and the second auxiliary change speed mechanism is activated when the first auxiliary change speed mechanism is in the neutral state.

## Claims

### Claim 1

A working vehicle comprising:
a main change speed mechanism configured to transmit a rotating power, generated by a power source;
a first auxiliary change speed mechanism configured to transmit the rotating power, transmitted through the main change speed mechanism, to drive wheels;
a second auxiliary change speed mechanism configured to transmit the rotating power, transmitted through the main change speed mechanism, to the drive wheels;
a first lever configured to operate the first auxiliary change speed mechanism to perform a first auxiliary shift operation, the first lever being configured to be operated by an operator; and
a second lever configured to operate the second auxiliary change speed mechanism to perform a second auxiliary shift operation, the second lever being configured to be operated by an operator; and
a regulating mechanism configured to:
limit the second auxiliary shift operation to maintain the neutral state of the second auxiliary change speed mechanism when the rotating power is transmitted by the first auxiliary change speed mechanism; and
limit the first auxiliary shift operation to maintain the neutral state of the first auxiliary change speed mechanism when the rotating power is transmitted by the second auxiliary change speed mechanism, wherein:
the first auxiliary change speed mechanism is activated when the second auxiliary change speed mechanism in a neutral state; and
the second auxiliary change speed mechanism is activated when the first auxiliary change speed mechanism is in the neutral state.

### Claim 2 (depends on 1)

The working vehicle according to claim 1, wherein:
the first auxiliary change speed mechanism includes a first shifter configured to change a rotating speed to a high speed or a low speed;
the second auxiliary change speed mechanism includes a second shifter configured to change the rotating speed to an extreme low speed; and
the first shifter and the second shifter are supported by a gearshift shaft.

### Claim 3 (depends on 2)

The working vehicle according to claim 2, further comprising:
a transmission shaft configured to:
transmit the rotating power when the rotating speed is changed to the low speed in the first auxiliary change speed mechanism; and
transmit the rotating power from the main change speed mechanism to the second auxiliary change speed mechanism.

### Claim 4 (depends on 1)

The working vehicle according to claim 1, wherein the second auxiliary change speed mechanism and the second lever are detachably attached to the working vehicle.

### Claim 5 (depends on 1)

The working vehicle according to claim 1, further comprising
a regulating mechanism configured to:
limit the second auxiliary shift operation when the rotating speed is changed by the first auxiliary change speed mechanism; and
limit the first auxiliary shift operation when the rotating speed is changed by the second auxiliary change speed mechanism.

### Claim 6 (depends on 5)

The working vehicle according to claim 5, further comprising:
a switching mechanism configured to switch a rotation corresponding to a generated power, generated by the power source, to rotation in advancing direction or reversing direction; and
a high-low change speed mechanism configured to change a rotating speed at a high speed stage or a low speed stage, wherein:
the main change speed mechanism is configured to change the rotating speed at any one of a plurality of gearshift stages; and
the first auxiliary change speed mechanism and the second auxiliary speed change mechanism are configured to change the rotating speed corresponding to the rotating power that is transmitted through the switching mechanism, the high-low change speed mechanism and the main change speed mechanism.

### Claim 7 (depends on 6)

The working vehicle according to claim 6, wherein:
each of the switching mechanism and the high-low change speed mechanism includes a hydraulic multiple disk clutch that is configured to switch a power transmission path; and
the main change speed mechanism is a synchromesh change speed mechanism and is configured to change the rotating speed corresponding to the rotating power that is transmitted through the switching mechanism and the high-low change speed mechanism.

### Claim 8 (depends on 7)

The working vehicle according to claim 7, further comprising:
a high-low switch configured to operate a high-low gearshift operation of the high-low change speed mechanism while the working vehicle is moving; and
a main lever configured to operate a main shift operation of the main change speed mechanism while the working vehicle is moving.