Komatsu Corporation

Hironori Yamamitsu

Hiroshi Nakagami

Taira Ozaki

Kanji Namimatsu

Hiroshi Ohta

Kenji Matsubara

Kazuki Kure

Takashi Tsukamoto

Masamichi Miyazaki

Takashi Katou

Yoshihisa Fujimoto

Naozumi Okura

A cab is used in a work machine. The cab includes a first pillar, a second pillar disposed to a rear of the first pillar, a beam disposed between the first pillar and the second pillar, and a reinforcing member provided to the beam.

Cab and work machine

An exhaust gas treatment unit includes an exhaust gas treatment device, a bracket and a connecting pipe. The exhaust gas treatment device is mounted on a bracket. The connecting pipe is connected to the exhaust gas treatment device. The connecting pipe directs exhaust gas to the exhaust gas treatment device. The connecting pipe may include a supporting portion and a pipe portion, with the supporting portion supporting the bracket and the pipe portion being integrated with the supporting portion. Alternatively, the exhaust gas treatment unit may further include a supporting member having a supporting portion supporting the bracket and a pipe portion integrated with the supporting portion, with the pipe portion connected to the connecting pipe.

Exhaust gas treatment unit

An engine unit includes an engine, an exhaust gas treatment device and a connecting pipe. The engine has an exhaust gas port. The exhaust gas treatment device is arranged above the engine. The connecting pipe connects the exhaust gas port and the exhaust gas treatment device. The connecting pipe has an expandable-contractible bellows portion. The bellows portion has a linear form following the upward-downward direction. The lower end portion of the bellows portion is positioned lower than at least a part of the exhaust gas port.

Engine unit

An exhaust treatment unit for a work vehicle includes a selective catalytic reduction apparatus, a connection pipe, an ejection apparatus attached to the connection pipe, a first pipe section that guides coolant to the ejection apparatus, a second pipe section that discharges coolant from the ejection apparatus, first and second retaining sections, and a coolant pump. The ejection apparatus ejects reducing agent into exhaust supplied to the selective catalytic reduction apparatus. The first and second retaining sections retain coolant and are connected to the first and second pipe sections above the ejection apparatus, respectively. The coolant pump is driven by an engine driving force and supplies the coolant to the ejection apparatus via the first pipe section. The first and second pipe sections extend upward from first and second connecting sections of the first and second pipe sections and the ejection apparatus toward the first and second retaining sections, respectively.

Exhaust treatment unit and work vehicle having exhaust treatment unit

A radiator grill is mounted on a work vehicle and includes a frame and a plate member. The plate member is supported by the frame and having a plurality of through-holes aligned in a first direction and a second direction orthogonal to the first direction. Each of the through-holes has a pair of circular parts aligned in the first direction, and an interconnecting part having a width in the second direction that is smaller than diameters of the circular parts, the interconnecting part interconnecting the circular parts. The through-holes are disposed alternately so that one of the circular parts of one of two adjacent ones of the through-holes adjacent to each other in the second direction is aligned with the interconnecting part of the other of the two adjacent ones of the through-holes in the second direction.

Radiator grill

In the engine compartment of a bulldozer the radiator is arranged forward of the engine. An exhaust gas treatment unit is arranged above the engine. A first exhaust gas treatment device of the exhaust gas treatment unit is arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. A second exhaust gas treatment device of the exhaust gas treatment unit is positioned to the side of the first exhaust gas treatment device, and arranged such that the longitudinal direction of the first exhaust gas treatment device follows the forward-backward direction of the vehicle. The air cleaner is arranged between the radiator and the exhaust gas treatment unit in the forward-backward direction of the vehicle.

Growing community of inventors

Hirakata, Japan

Hironori Yamamitsu