Kobelco Construction Machinery Co., Ltd.

Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Yasumasa Kimura

Kazuhiro Ueda

Hajime Nakashima

Zenzo Yamaguchi

Kyoko Masuda

Yoshimune Mori

Yosuke Fukushima

Masashi Kawabata

Masaru Numasawa

Shoji Yoshimura

Kazuki Tsugihashi

Shuichi Ono

Tomoya Taniuchi

Eiji Kanki

Toru Sakatani

Hideo Utsuno

Kiyotsuna Kuchiki

Tomonori Nakashita

Eri Watanabe

Takahiro Shinozaki

Shinichi Kinoshita

Masaya Nishizawa

Masashi Irie

Toshiyuki Kobayashi

A heat exchanger includes: a heat exchange section through which a compressed gas flows; an upstream header section that is provided on an upstream side of the heat exchange section and communicates with the heat exchange section; a downstream header section that is provided on an downstream side of the heat exchange section and communicates with the heat exchange section; a gas inlet pipe that is connected to a wall surface of the upstream header section; and a gas outlet pipe that is connected to a wall surface of the downstream header section. A filter-cum-sound absorbing material of a porous material is mounted on an inner wall surface of at least one of the upstream header section and the downstream header section. The inner wall surface faces the heat exchange section.

Heat exchanger for gas compressor

The vibration of a cab deck as well as the mass of a deck supporting member is suppressed. A slewing frame of an upper slewing body includes a front plate connected to a second side plate. A cab deck is disposed on a front side of an engine deck with a gap between the cab deck and the engine deck. A deck supporting member is connected to the second side plate and the cab deck. When viewed along an up-and-down direction, a connection portion of the front plate to be connected to the second side plate is opposed to, in the lateral direction via the second side plate, a connection portion of the deck supporting member to be connected to the second side plate.

Upper slewing body

A soundproof cover () is equipped with: multiple unit soundproof covers (R,L) forming a portion of the circumferential cross section (); and connecting parts () provided on the periphery of the circumferential cross section (), and connecting the multiple unit soundproof covers (R,L) in a detachable manner. The multiple unit soundproof covers (R,L) are configured so as to be capable of being attached and detached with respect to a muffler () by moving the unit covers in a direction (the radial direction (R)) orthogonal to the axial direction (A) of the muffler ().

Muffler sound-insulation structure

A construction machine includes: an engine room provided with an intake opening and a discharge opening; a fan for sucking cooling air into the engine room through the intake opening; a duct provided in the engine room so as to communicate with the discharge opening and discharging the cooling air sucked into the engine room to an outside of the engine room through the discharge opening; and an exhaust gas pipe guiding exhaust gas discharged from the engine into the duct. A portion on a distal end side of the exhaust gas pipe is inserted into the duct, and the inserted portion of the exhaust gas pipe inserted into the duct is formed with an exhaust hole which causes the exhaust gas to be discharged in a direction different from a flowing direction of discharge wind in the duct through the exhaust hole.

Construction machine

A hydraulic tubing support that reduces noise transmitted to an operator due to pulsation of hydraulic oil in a junction tube. The hydraulic tubing support structure includes a pair of left and right remote control valves for generating pilot pressures for the plurality of hydraulic actuators in response to an input operation performed on each operating lever, pump-side tubes and tank-side tubes respectively extending from the respective remote control valves, a junction tube for allowing communication of the tubes guided to below a floor plate through a through hole and communication of the tubes guided to below the floor plate through a through hole, and a middle reinforcement beam extending in a right-and-left direction and fixed to the lower surface of the floor plate. The junction tube is fixed to the middle reinforcement beam in a non-contact state with the floor plate.

Hydraulic tubing support structure and operating machine provided therewith

A construction machine includes: a lower propelling body; and an upper slewing body which is slewably mounted on the lower propelling body. The upper slewing body includes: an engine room provided with an intake opening and a discharge opening; a duct provided in the engine room so as to communicate with the discharge opening; and an exhaust gas pipe which guides exhaust gas discharged from the engine into the duct. The discharge opening and an outlet of the duct are open downward from the engine room. A portion on a distal end side of the exhaust gas pipe is inserted into the duct. The duct and the exhaust gas pipe are configured to cause the exhaust gas to be mixed with cooled air in the duct and cause the mixture of the exhaust gas and the cooled air to be discharged downward from the discharge opening.

A construction machine capable of effectively reducing noise which would intrude into a cab, without deterioration in ride quality, comfort and air-conditioning efficiency in the cab is provided. The construction machine includes a lower propelling body, an upper slewing body including an upper frame, a cab including a floor plate and installed on the upper frame, and a cab noise reduction device. The cab noise reduction device includes: the floor plate; an under-cab member including a cab deck supporting the cab and provided under the cab to define a closed-form under-cab space whose periphery is substantially closed, in cooperation with the floor plate; and a resonator reducing noise in the under-cab space by a resonance effect.

Construction machine with cab noise reduction device

A lubricating liquid separator which can damp compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister having a sound absorbing performance is disposed on an outer periphery of a partition plate. Compressed gas which enters the interior of a housing through a compressed gas inlet port flows as rotating flow in a flow path between the partition plate and a portion of a side wall of the housing opposed to the partition plate. Pressure pulsation of the compressed gas is diminished by the demister, and a compressor pulsation noise by the rotating flow of the compressed gas is diminished by the sound absorption of the demister. Further, with the demister, reflection of the compressed gas at a wall surface of the partition plate is suppressed, and scattering of lubricating liquid separated from the compressed gas is suppressed.

Lubricating liquid separator

To improve soundproof performance on an air intake side of a cooling structure of a construction machine without enlarging an air intake chamber. An air intake chamber is provided on the air intake side of a heat exchanger in an engine room, and a first air intake port is formed in a top face of the air intake chamber. In the air intake chamber, a duct independently formed as a shield member is disposed so as to partition the air intake chamber into two chambers, and also such that the core surface of the heat exchanger is enclosed airtightly from the surrounding atmosphere. A second air intake port is formed in the duct; thereby, the air intake chamber is constituted in a doubled duct structure, and air sucked from the first air intake port is guided through an air intake passage to the core surface of the heat exchanger, the air intake passage being bent so as to be roughly L-shaped.

Cooling structure of construction machine

Engine noise of a construction machine is effectively reduced without reducing cooling performance and with an increase in the height of a body cover kept minimum. To achieve the above, an air-intake opening portion () and an air discharge opening portion () are arranged in a body cover () of an upper rotating body (), and a cooling fan () in an engine room covered by the body cover () is driven, taking cooling air in from the air-intake opening portion () to cool a heat exchanger () in the body cover () and discharging the air from the air discharge opening portion (). The air-intake opening portion () is laterally offset from a position facing to a ventilation surface of the heat exchanger (). Alternatively, plural air-intake opening portions are located in a scattered manner such that the plural air-intake opening portions include the offset air-intake opening portion offset from the ventilation surface of the heat exchanger ().

The present invention relates to a silencer easily cleanable inside. This silencer comprises a casing cylinder and a segment member housed in the casing cylinder to constitute a sound reducing means. The silencer further comprises a segment member fastening means for fastening the segment member to the casing cylinder, a gas inlet-side lid plate with a punched hole, which closes an opening at one end of the casing cylinder, and a gas outlet-side lid plate with a punched hole, which closes an opening at the other end of the casing cylinder. At least either one of the gas inlet-side lid plate or the gas outlet-side lid plate is adapted to be detachable from the casing cylinder.

Silencer

A construction machine includes an engine guard, an engine, a cooling fan, and a device for being cooled by the cooling fan, and an exhaust duct. The engine guard accommodates the engine and has intake and exhaust openings. The intake opening and the exhaust opening are disposed in different side covers. The side covers correspond to the left and right side walls of the engine guard. The engine, the cooling fan, and the device are accommodated in the engine guard. The exhaust duct is disposed above and behind the engine, parallel with the flow of a fan air which has been used for cooling the engine, and substantially horizontally. The exhaust duct has an exit connected to the exhaust opening. The fan air introduced from the intake opening flows substantially linearly along the cooling fan, the engine, and the exhaust duct and is discharged from the exhaust opening.

Growing community of inventors

Kobe, Japan

Yasumasa Kimura