| KOBELCO CONSTRUCTION MACHINERY CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120112495 | UPPER FRAME FOR CONSTRUCTION MACHINE - In a side deck of a construction machine, includes a cross allowing member which has a shape avoiding a reinforcement member so as to allow the reinforcement member to extend across a mount holding member longitudinally of the side deck. A front end of the reinforcement member is directly joined to the front beam while the reinforcement member extends longitudinally across the cross allowing member. | 05-10-2012 |
| 20120104798 | OPERATION UNIT FOR CONSTRUCTION MACHINE AND HOSE COVER TO BE PROVIDED THEREIN - An operation unit for a construction machine includes a floor, an operation seat and a console box. A pilot valve is provided within the console box, a plurality of hoses are connected to the pilot valve and arranged at least from the pilot valve to the floor while bundled together, and a hose cover covers a plurality of over-floor portions of the respective hoses between the pilot valve and the floor. | 05-03-2012 |
| 20120097468 | CONSTRUCTION MACHINE - A construction machine is provided with a clamp receiver | 04-26-2012 |
| 20120061995 | DEVICE REMOVING/RE-INSERTING STRUCTURE, AND DEVICE REMOVING/RE-INSERTING METHOD FOR CONSTRUCTION MACHINE - A demountable pillar | 03-15-2012 |
| 20120061994 | PILLAR STRUCTURE FOR CONSTRUCTION MACHINE - In a structure where a floor plate ( | 03-15-2012 |
| 20120056412 | WORKING MACHINE - A working machine is provided with a pressing mechanism | 03-08-2012 |
| 20120001454 | DOOR FOR CABIN IN CONSTRUCTION MACHINE - The invention provides a door for a cabin in a construction machine, the door including a pulling handle portion to be pulled in a closing direction of the door from the inside of the cabin and preventing the pulling handle portion from misuse as a riding handle, the riding handle including a first gripped portion extending in a first extending direction to be gripped by an operator when the operator rides in the cabin. The door includes a cabin frame having an entrance and a riding handle projecting from an fringe portion fringing the entrance of the cabin frame in a specific direction. The door has a door frame vertically extending and a door glass to be attached to the door frame. The door frame has a pulling handle portion, which is attached to the cabin frame pivotally around a vertical pivot axis so as to allow the door to open and close the entrance of the cabin and projects in a direction having a component of a direction away from the door glass to be gripped for operating the door in the closing direction from the inside of the cabin. The pulling handle portion is disposed so as to be aligned with the riding handle in front and rear directions outside the cabin when the door is fully opened. the pulling handle portion satisfies at least one of the following directions: a first condition that the height position of the second gripped portion is offset upward from the height position of the riding handle; and a second condition that the second gripped portion of the pulling handle portion extends in a second extending direction different from the first extending direction. | 01-05-2012 |
| 20110304169 | ELECTRICAL COMPONENT HOUSING DEVICE AND CONSTRUCTION MACHINE INCORPORATED WITH THE SAME - An electrical component housing device is provided with a housing box | 12-15-2011 |
| 20110291443 | FRONT WINDOW FORMED IN CABIN OF CONSTRUCTION MACHINE - Provided is a front window formed in a cabin including an upper window formed in a front face of the cabin and having a window frame with an underside portion, and a lower window disposed below the upper window so as to contact the upper window, while being capable of inhibiting condensed water from building up on the underside portion and rusting the underside portion. The upper window is provided with a glass plate having a periphery to be attached to an outer face of the window frame, defining a clearance between the underside portion and the glass plate to let out the condensed water generated on an inner face of the glass plate downwardly from the underside portion. | 12-01-2011 |
| 20110254513 | HYBRID WORKING MACHINE HAVING BATTERY PROTECTING FUNCTION - Provided is a hybrid working machine capable of performing battery charging control both for a working period and a standby period. The hybrid working machine includes a hydraulic actuator, an engine, a hydraulic pump driven by the engine to supply hydraulic fluid to the hydraulic actuator, a battery, a generator motor connected to the engine to serve as a generator by an output power of the engine to charge the battery and serve as a motor for assisting the engine by supply of an electric power from the battery, a battery monitor detecting a battery SOC, a controller which controls a charging power of the battery depending on the battery SOC, and a working state detector detecting a working state as information for discriminating between a working period during which the hydraulic actuator is actuated and a standby period during which the hydraulic actuator is not actuated. The controller limits the charging power in the standby period in comparison with in the working period. | 10-20-2011 |
| 20110243700 | WORKING MACHINE WITH EQUIPMENT ROOM - A working machine comprising a frame, a working implement supported at a front end of the frame, a cover member, a latch member, a selector valve and a support bracket. The cover member has a cover-member body covering a side equipment room and having an opening, a lid member to open and close the opening, a lockable member attached to an inner side of the cover-member body near the opening, and a hinge portion interconnecting the frame and a rear end of the cover-member body and supporting the cover-member body. The latch member is disposed near the opening and inside the side equipment room to hold the cover member closed in cooperation with the lockable member. The support bracket extends from the side equipment room toward the opening and supports the latch member and the selector valve at the side of the frame. The support bracket has a selector valve-retaining portion supporting the selector valve and a latch member-retaining portion retaining the latch member at a position closer to the opening and higher than the selector valve. | 10-06-2011 |
| 20110227512 | SLEWING CONTROL DEVICE AND WORKING MACHINE INCORPORATED WITH THE SAME - There is provided a slewing control device that enables to detect breakdown of a driving system of a mechanical brake, and generate a torque for holding a slewing body in a stopped state to thereby prevent movement of the slewing body when an anomaly has occurred. In a working machine for driving a slewing body by an electric motor | 09-22-2011 |
| 20110226348 | CONSTRUCTION MACHINE - Left and right first and second vertical plates | 09-22-2011 |
| 20110225938 | ENGINE AIR INTAKE DEVICE AND CONSTRUCTION MACHINE INCORPORATED WITH THE SAME - Two air cleaners | 09-22-2011 |
| 20110214931 | CONSTRUCTION MACHINE PROVIDED WITH ENGINE ROOM - Disclosed is a construction machine comprising an engine room having first and second exhaust ports, preventing deterioration of air flows due to collision of exhaust airs through the first and the second exhaust ports, and reducing noise transmission on lateral sides of the construction machine. The construction machine comprises an engine guard surrounding an engine room; an engine, a heat exchanger, and a cooling fan, which are installed in the engine room; and an exhaust air guide. The engine guard is formed with exhaust ports including the first and second exhaust ports. The first is opened in parallel to an axial direction of an engine output shaft. The second is formed in proximity to the first exhaust port downstream of the first exhaust port with respect to a direction parallel to the axial direction of the engine output shaft and opened upward below the first exhaust port. The exhaust air guide has a shape to change a flow direction of the air discharged through the first exhaust port in parallel to the axial direction of the engine output shaft into an upward direction at a position upstream of the second exhaust port. | 09-08-2011 |
| 20110188982 | WORKING MACHINE - A working machine includes a base machine and a working attachment. The working attachment has a base-end boom, a lead-end boom, and an arm. The working machine is collapsible into a triple-folded state, with the base-end boom being located on the upper side and the arm being located on the lower side with respect to the lead-end boom, as a posture of the working machine for transport. The working machine further includes a lead-end boom cylinder for moving the lead-end boom, and an arm cylinder for moving the arm. The lead-end boom has a first lead-end boom cylinder attachment portion for mounting the lead-end boom cylinder, and a first arm cylinder attachment portion for mounting the arm cylinder. The first lead-end boom cylinder attachment portion is disposed at a position different from the first arm cylinder attachment portion in a widthwise direction of the working attachment, and lower than the first arm cylinder attachment portion in the transport posture. | 08-04-2011 |
| 20110162908 | CONSTRUCTION MACHINE WITH CAB NOISE REDUCTION DEVICE - 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. | 07-07-2011 |
| 20110073402 | HYBRID CONSTRUCTION MACHINE - A hybrid construction machine includes an engine, a generator motor, and a hydraulic pump. They constitute a power unit, and are connected in series, with the generator motor being disposed between the engine and the hydraulic pump and with a center of gravity of the entire power unit being positioned closer to the generator motor than the center of gravity of the engine. A mount installation bracket is mounted at a side of each flange disposed at a corresponding side of the generator motor. A generator-motor-side mount device is mounted to the bracket. | 03-31-2011 |
| 20110057660 | CURRENT LEAKAGE DETECTOR OF CONSTRUCTION MACHINE - In a construction machine in which a motor is driven by battery power through an inverter in accordance with operation of an operating lever, current-leakage detection signal output means applies a voltage signal, which is adapted for detection of a current leakage, between DC buses connected to the battery and a body of the machine. The applied signal voltage is detected by signal detection means, and the occurrence or non-occurrence of a current leakage is determined based on a crest value of the detected voltage signal. When the operating lever is operated during the determination, the determination is suspended to prevent erroneous detection. | 03-10-2011 |
| 20110057596 | CURRENT LEAKAGE DETECTOR OF CONSTRUCTION MACHINE - An inverter is forcibly operated to supply electric power to a motor, thereby performing detection of a current leakage, on condition that a power-on operation is performed, that the motor is stopped, and that determination as to occurrence or non-occurrence of the current leakage has not yet been made even once after the power-on. | 03-10-2011 |
| 20110025097 | CONSTRUCTION MACHINE - In a construction machine wherein a cab is mounted on an upper frame of an upper rotating body through an anti-vibration mount, a guard member for protecting the cab in the event of a roll over of the construction machine is mounted so as to extend from a front face portion to a ceiling of the cab, and a lower end of a front portion of the guard member which front portion covers the front face portion of the cab is fixed to a front end portion of the upper frame by a fixing mechanism which permits movement of the cab created in both vertical and horizontal directions by the anti-vibration mount. | 02-03-2011 |
| 20110025096 | CONSTRUCTION MACHINE - In a construction machine such as a hydraulic excavator in which a boom of a working attachment is arranged to one of the left and right sides of a cab into which an operator gets on, a load transmission member for transmitting a lateral load imposed on the cab at the time of rollover of a machine main body to the boom serving as a load receiving member is attached to a side surface of the boom in a state that the load transmission member is elastically deformable taking a boom attachment point as a supporting point, further, a projection piece is provided for this load transmission member, and a clearance is formed between this projection piece and a left end surface of a top plate of the boom. | 02-03-2011 |
| 20110011377 | CONSTRUCTION MACHINE - The present invention provides a construction machine, capable of enhancing the cooling efficiency of an air-cooled cooler for EGR without deterioration of the cooling effect of a heat exchanger in spite of the arrangement of the air-cooled cooler for EGR near a cooling fan. The construction machine includes: an EGR line | 01-20-2011 |
| 20100303642 | CONTROLLER AND WORK MACHINE PROVIDED THEREWITH - A controller includes: a storage unit that stores a map in which an operation amount and an upper limit value of suction horsepower of a hydraulic pump are associated with each other, for each operation content identified by a cylinder that is an operation object out of the cylinders, and by a direction of operation performed on this cylinder; an operation horsepower determination unit that determines the upper limit value of suction horsepower for each cylinder by using the map stored in the storage unit when an actuation command relating to at least one cylinder is input by an operation lever; a high-level selection unit that selects the maximum upper limit value of suction horsepower out of the upper limit values of suction horsepower determined by the operation horsepower determination unit; and a regulator that regulates a displacement of the hydraulic pump so as to obtain horsepower equal to or lower than the suction horsepower selected by the high-level selection unit. | 12-02-2010 |
| 20100303541 | CONNECTING MEMBER OF CONSTRUCTION MACHINE - Provided is a boom top comprising first and second support plates and an intermediate support member disposed between the first and second support plates. The intermediate support member has a bottom plate formed with a draw-out hole for a casting mold, and a cover plate covering the draw-out hole. A projection protruding in a draw-out direction of the casting mold is formed on the entire perimeter of an edge facing the draw-out hole, in the bottom plate. | 12-02-2010 |
| 20100297926 | HYBRID WORKING MACHINE - In a hybrid working machine including a power storage device serving as a power source for a generator motor and a controller for controlling this power storage device, the power storage device and the controller being each made up of a main body and casing covering the main body, the power storage device is arranged on the upper side of a top plate of a stand provided on an upper frame, the controller is arranged on the lower side, an intake port is provided in the casing of the power storage device, an exhaust port is provided in the casing of the controller, a ventilation port is provided in the top plate, and the cooling air is fed into the interior of the power storage device and the controller, so that the power storage device and the controller are cooled down. | 11-25-2010 |
| 20100296904 | GRIPPING DEVICE OF WORKING MACHINE AND WORKING MACHINE WITH THE SAME - A gripping device includes a gripping-device body mounted to an end of a working arm; two gripping members pivotably supported by this body in an opening-closing direction; and a driver that drives the gripping members to open and close them. At least one of the gripping members includes one of various kinds of detachable sections each including a gripping segment; a holding section pivotably connected to the gripping-device body about a central pivot shaft and selectively holding the detachable section in a detachable manner; and a coupling member for detachable coupling. The detachable section has a restrained segment having a detachable-section through-hole extending parallel to the central pivot shaft. The holding section has an opening-closing-direction restraining segment that restrains the restrained segment in the opening-closing direction and a holding wall to which the restrained segment is fastened with the coupling member from a direction parallel to the detachable-section through-hole. | 11-25-2010 |
| 20100294578 | WORKING MACHINE - A plurality of supports and a top plate attached to between upper ends of the supports are provided, and a power storage device and a controller are installed on the both upper and lower sides of the top plate respectively. Meanwhile, a hydraulic pump and a control valve are accommodated in space for hydraulic devices on the lower side of the top plate, and a heat insulating member and heat shield plates are provided as heat shield means for protecting the power storage device and the controller against heat from the exterior including heat of the hydraulic pump and the control valve. | 11-25-2010 |
| 20100294577 | HYBRID WORKING MACHINE - Since a stand including a plurality of supports and a top plate is built in on one side of a rear part of an upper frame of an upper rotating body as seen from an operator in a cabin, and a power storage device is installed on the top plate of this stand, the power storage device is arranged at the highest position among all the devices mounted in the upper rotating body. The power storage device is made up of a main body and a casing, and cooled down by taking cooling air into the casing. | 11-25-2010 |
| 20100290884 | GRIPPING DEVICE OF WORKING MACHINE AND WORKING MACHINE WITH THE SAME - A gripping device includes a spring member provided between a gripping member body and a shaft so that driving of a gripping driving cylinder causes a driving force to be transmitted from the gripping driving cylinder to the body while the shaft and the body are held in a predetermined positional relationship; so that the body is allowed to retreat with respect to the shaft by elastically deforming the spring member by an opposing force received from a processing object that contacts the body as a result of rotating the body; and so that contact pressure of the body with respect to the processing object is increased by an elastic force of the spring member as the body retreats. | 11-18-2010 |
| 20100226710 | PIN CONNECTION DEVICE - Assembly of a pin guide member for retaining a pair of connecting pins is facilitated for improvement in an assembling property and cost reduction. On the premise that inner brackets are overlapped with outer brackets, and pins are inserted into pin holes thereof so as to connect the brackets to each other, inner collar portions of pin guide members for retaining the pins are combined and integrated with each other by bolts and nuts through a supporting plate serving as a connection member. Meanwhile, outer collar portions of both the pin guide members are supported in the pin radial direction with respect to the inner brackets and rotation thereof is prevented. | 09-09-2010 |
| 20100218488 | CONSTRUCTION MACHINE - A construction machine that permits an exhaust gas after-treatment device to be disposed while avoiding an increase of height and hence avoiding narrowing of an operator's visual field. A guard panel is disposed substantially in parallel with a base frame. The guard panel includes a top plate, the top plate including an opening formed at a portion thereof corresponding to an engine, and a bonnet formed so as to project upwards from the top plate and cover the opening. A first treatment section is disposed lower than the top plate and a second treatment section includes at least a portion positioned higher than the top plate through the opening and lower than the bonnet. | 09-02-2010 |
| 20100206927 | TOOLBOX STRUCTURE OF CONSTRUCTION MACHINE - An illumination device is installed in a box body of a toolbox of a construction machine, and is protected by a protective cover. Water that flows into the box body through a weep hole formed in a lid is received by the protective cover and is guided to a water drain hole formed in a bottom plate of the box body. Then, the water is drained to the outside of the box body. | 08-19-2010 |
| 20100193296 | HYBRID WORKING MACHINE - As lubricating construction for a spline coupling portion for connecting a rotating shaft of a generator-motor and a rotating shaft of a hydraulic pump both actuated by an engine, a lubricating oil chamber communicating with the spline coupling portion is formed within a motor casing of the generator-motor, while in a pump casing of the hydraulic pump there is formed an oil passing hole providing communication between the lubricating oil chamber and an oil chamber in the hydraulic pump on an outer periphery side of the rotating shaft of the hydraulic pump, thereby forming an oil passage for allowing working oil present within the hydraulic pump to circulate through a route including the spline coupling portion. | 08-05-2010 |
| 20100192551 | CONSTRUCTION MACHINE - A construction machine that permits an exhaust gas after-treatment device to be disposed while suppressing an increase of height. An upper surface of a hydraulic pump is positioned lower than an upper surface of an engine, a tank device having at least one of a working oil tank and a fuel tank is provided at a rear portion thereof with a small height portion which has an upper surface of a height almost equal to or smaller than the height of the upper surface of the hydraulic tank, and an exhaust gas after-treatment device is disposed at a position above both the small height portion and the hydraulic pump. | 08-05-2010 |
| 20100170974 | HYDRAULIC CRUSHER - A hydraulic crusher includes crushing arms, a crusher body having a hollow portion extending in the longitudinal direction, and hydraulic cylinders. The hydraulic crusher includes four first hydraulic hoses which have proximal caps connected to ports of the crusher body and extend toward the distal side in the longitudinal direction in the hollow portion; four second hydraulic hoses which have proximal caps connected to ports of the hydraulic cylinders, and extend into the hollow portion and then toward the distal side in the longitudinal direction while being curved; and a clamp or the like serving as a joint member movable in the longitudinal direction, the clamp connecting distal sections of the first hydraulic hoses with distal sections of the second hydraulic hoses. | 07-08-2010 |
| 20100170239 | HYBRID WORKING MACHINE - In a hybrid working machine in which the maximum engine output is set at the average power and the maximum pump input is set to be larger than the maximum engine output in a normal state, in an abnormal state in which the level of charge of a battery decreases and assistance ability of a motor function of a power machine is lost, the minimum pump flow rate is reduced to a value equal to or smaller than a standby flow rate, the standby flow rate being the minimum pump flow rate used in normal state control, and a set value of the maximum pump input is changed such that the maximum pump input is smaller than the maximum engine output. | 07-08-2010 |
| 20100146860 | WORKING MACHINE - A working machine has a machine room cover and a bonnet on an upper rotating body. The bonnet has a frame-like raising member and a dome-like hood member that covers an opening in the upper part of the raising member. The lower part of the raising member is attached so as to surround an opening portion formed in the upper surface of the machine room cover, and the hood member is attached to the raising member so as to be able to be rotationally opened and closed. | 06-17-2010 |
| 20100126791 | CONSTRUCTION MACHINE - A muffler of a construction machine is formed by respectively coupling silencers to entrance and exit sides of an exhaust-gas purifying device by flanges. In flange coupling portions, mounting seats are provided integrally with lower semicircumferential portions of the flanges of the silencers in a manner such as to protrude toward outer peripheries of the flanges. By coupling the mounting seats to muffler mount brackets attached to a muffler mount, the muffler is mounted on the muffler mount. | 05-27-2010 |
| 20100122865 | CONSTRUCTION MACHINE - A gate-shaped muffler mount including front and rear leg portions and a muffler attaching portion is attached to a mounting bracket for supporting an engine with bolts so as to straddle a hydraulic pump. One of mounting holes has a diameter larger than the diameter of the bolt, and the muffler mount is therefore rotatable around the other bolt along the axial direction of a bellows. By this rotation, the bellows can be positionally adjusted in the axial direction relative to an engine exhaust pipe so that assembly errors can be absorbed. | 05-20-2010 |
| 20100102763 | HYBRID WORKING MACHINE - In a hybrid excavator, a generator motor and a hydraulic pump are driven by using an engine as a power source. A battery is charged with power generated by the generator motor. A rotation motor is driven by the generator motor and the battery. The voltage of a DC bus is detected by a voltage sensor, and whether the battery is unusable is determined by a breakdown detector. When the battery becomes unusable, emergency evacuation control is performed so that the power consumption of the rotation motor will be suppressed to be less than or equal to the power generation of the generator motor while maintaining the DC bus voltage greater than or equal to the normal operation voltage of the system. | 04-29-2010 |
| 20100089049 | HYDRAULIC DRIVE DEVICE AND WORKING MACHINE WITH THE SAME - A hydraulic drive device capable of utilizing return oil effectively while maintaining a driven speed of a hydraulic actuator, as well as a working machine having the hydraulic drive device, are provided. The hydraulic drive device includes a controller. During an external force applying period in which a return oil pressure exceeds a discharge pressure from a hydraulic pump, the controller specifies a regenerating flow rate capable of being conducted to a regeneration oil passage and a surplus flow rate other than the regenerating flow rate on the basis of power required of the hydraulic pump out of return oil other than return oil which is conduced to a tank through a control valve, then conducts the return oil of the regenerating flow rate to the regeneration oil passage and controls an MO valve and a regulator so that the return oil of the surplus flow rate is conducted to an outlet oil passage. | 04-15-2010 |
| 20100032985 | CABIN AND TRAVELING CONSTRUCTION MACHINE WITH THE SAME - A rear beam has a first beam with right and left ends welded to right and left rear supports and a second beam welded to a front surface of the first beam along the right and left direction. The second beam is welded to the first beam so that an upper end portion of the second beam is above an upper end portion of the first beam and a lower end portion of the second beam is above a lower end portion of the first beam. | 02-11-2010 |
| 20100032984 | REINFORCED STRUCTURE FOR CABIN OF WORKING MACHINE - A reinforced structure for a cabin of a working machine is disclosed, which comprises a cabin, a boom installed along the cabin, and a reinforcing member provided for the cabin. The cabin includes front pillars, upper pillars and rear pillars. The reinforcing member includes a first member located longitudinally between upper ends of the front and rear pillars located on the working apparatus side of the cabin, the first member being fixed to the upper pillar located on the same side, and a second member, one end of the second member being fixed to an intermediate position of the first member, and the other end thereof being fixed to the other upper pillar. | 02-11-2010 |
| 20090309343 | CONSTRUCTION MACHINE - Handrail mounts are provided in a bottom portion of a cast upper frame, and lower ends of side supports of a handrail are attached to the above handrail mounts. A base plate for attaching a floor plate is hanged and fixed between the side supports at a higher position than the attachment position, and a front end part of the floor plate is attached to the above base plate. | 12-17-2009 |
| 20090304485 | WORKING MACHINE WITH STRUCTURE FOR ASSEMBLING BOOM THEREOF - Bosses extending in the boom width direction are provided in a front end part of a main boom body rotated upward, and hooks opening downward are provided in a base end part of a front boom body rotated downward. In a state that the bosses and the hooks are engaged with each other, a scooping action is performed so as to match pin holes thereof. The above hooks and the bosses are arranged so as to satisfy a condition that in a state that an angle between both boom bodies is a maximum angle at the time of work, the hooks and the bosses are moved away from each other and a distance between the hooks and the bosses is increased as the angle is reduced from the maximum angle. | 12-10-2009 |
| 20090304484 | WORKING MACHINE WITH STRUCTURE FOR ASSEMBLING BOOM THEREOF - Bosses extending in the boom width direction are provided in a front end part of a main boom body rotated upward, and hooks opening downward are provided in a base end part of an extension boom body rotated downward. The above hooks and the bosses are arranged so as to satisfy a condition that at the time of second relative rotation by a two-step pin hole matching method of matching pin holes in order from the upper side and with a different center, the hooks and the bosses are moved away from each other while lower pin holes are matched with each other. | 12-10-2009 |
| 20090205723 | HYDRAULIC CIRCUIT OF CONSTRUCTION MACHINE - A throttle path for returning a part of pilot oil to a tank is formed by a tank path provided in a valve block of a control valve and a notch provided in a spool thereof. The above path is opened within a section from a vicinity of a stroke where a hydraulic actuator starts moving to right before a stroke end among a spool stroke of the control valve. An opening area of the above path is slowly reduced in accordance with an increase in the stroke at a final phase of the section. | 08-20-2009 |
| 20090205328 | CONSTRUCTION MACHINE - A rear half part of a surface of a main body of a working oil tank installed in line with a control valve opposing to the valve is dented in an inclining surface shape in the direction moving away from the valve so that between both the tank and the valve, is formed a working space for attaching and detaching a pressure compensating spool, while return tubes are separately connected to the upper and the lower side of a filter case side wall within the body. Within the body, is provided a cylindrical filter case having a bottom in which a return filter for return oil is housed, and the return tubes are connected to the case side wall in a state of communicating with the inside of the filter case. In this configuration, a filter receiving plate is provided in a lower part within the filter case with leaving a gap between the plate and the filter case bottom wall in a state that the plate is supported by a return pipe, the return filter is disposed on the plate, and the return tubes are connected to the filter case side wall on the lower side than the plate. | 08-20-2009 |
| 20090140547 | MOUNTING STRUCTURE OF DRIVERS CAB TO BASE FRAME AND CONSTRUCTION MACHINE THEREWITH - A restraining means includes a shaft member projecting laterally from a frame member, and a plate which is fixed to a base frame and in which an insertion hole capable of inserting the shaft member therethrough is formed. The restraining means is configured so that an inner surface of the insertion hole and the shaft member are not in contact with each other within a moving range of a drivers cab allowable by an installation mount, and so that the inner surface of the insertion hole is in contact with an upper surface of the shaft member when the drivers cab is lifted from the base frame beyond the moving range. | 06-04-2009 |
| 20090030580 | EXCAVATOR - In a corner part on the front and lower side of a contact area between a bucket and a cabin formed by an area front surface serving as a front limitation of the contact area and an area lower surface serving as a lower limit of the contact area, an exception area of a right triangle seen from the side taking the area front surface as a vertical side and the area lower surface as the base is set under a fixed condition. When an arm top pin is within the above exception area, a contact prevention function is cancelled and actions of boom raising, arm pulling and left offset are permitted in a decelerating state. | 01-29-2009 |
| 20080296522 | RELIEF PRESSURE SWITCHING APPARATUS FOR HYDRAULIC WORKING MACHINE - In a relief pressure switching apparatus for hydraulic working machine for switching a relief pressure of a hydraulic actuator circuit in accordance with a specification of a compression crushing apparatus or a breaker to be installed, electromagnetically variable relief valves for determining the relief pressure are provided, and a controller commands the relief pressure selected by an operator from a plurality of relief pressures preliminarily set and stored in combination with a flow rate as matching a working apparatus to the relief valves. | 12-04-2008 |
| 20080282586 | UPPER ROTATING BODY AND CONSTRUCTION MACHINE THEREWITH - The present invention is provided with a pair of vertical plates disposed on a rotating frame, a fuel tank and a working oil tank aligned on the rotating frame in the front-back direction, hydraulic pipes for coupling a control valve provided in the working oil tank and a working actuator, and a retaining tool for retaining the hydraulic pipes between the control valve and the actuator, and the hydraulic pipes are arranged from the control valve to the retaining tool through a clearance formed between the fuel tank and the working oil tank. | 11-20-2008 |
| 20080250782 | HYDRAULIC CONTROL DEVICE OF WORKING MACHINE - A rotation prioritizing valve serving as a flow rate control valve of a hydraulic pilot type is provided on the meter-in side of an arm cylinder. At the time of a combined operation of arm pulling and rotation, the rotation prioritizing valve is activated by rotation pilot pressure so that a meter-in flow rate of the arm cylinder is throttled to prioritize rotation movement. On the premise of the above, a switching valve is provided in a pilot line of the rotation prioritizing valve and switched so as to release a throttling effect of the rotation prioritizing valve when boom lowering movement is added to the combined operation of arm pulling and rotation so that a rotation prioritizing function is cancelled. | 10-16-2008 |
| 20080223319 | Cooling Structure of Construction Machine - Problem: To improve a soundproof performance on an air intake side of a cooling structure of a construction machine without enlarging an air intake chamber. | 09-18-2008 |
| 20080202451 | MOUNTING STRUCTURE OF FILTER FOR COOLER OF CONSTRUCTION MACHINE - On the front surface side of a cooler, a filter mounting portion provided with a filter abutment surface with which a filter is brought into abutment from the front side of the filter mounting portion is provided. The front end side of the filter pushed in from a maintenance port is pressed onto an elastic body formed of a plate spring and provided in the filter mounting portion. Thereby, by a pressing force F | 08-28-2008 |
| 20080201045 | ROTATION CONTROL DEVICE AND WORKING MACHINE THEREWITH - An excavator has a controller capable of setting target torque of a rotation motor in accordance with a speed deviation between target speed set in accordance with an operation amount of an operating lever and actual rotation speed and is provided with an inverter for detecting necessary torque for rotating an upper rotating body, the necessary torque being changed in accordance with a working state of the upper rotating body. The controller calculates a correction amount which is increased as increasing the torque and subtracts the correction amount from the target speed so as to set new target speed. A controller sets first target torque for driving the motor and second target torque for maintaining the upper rotating body on the spot on the basis of the actual speed, and operates the motor in accordance with the torque which has a larger absolute value in the same direction as the first target torque among both the torque. | 08-21-2008 |
