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1. 发明专利

JP2000240605A SYNCHRONIZATION CONTROLLER FOR HYDRAULIC ACTUATOR 失效
公开(公告)号：JP2000240605A
公开(公告)日：2000-09-05
申请号：JP4307499
申请日：1999-02-22
申请人： YUTANI JUKO KK
发明人： NISHIKINO TADAKAZU
IPC分类号： B66C13/22 , F15B11/04 , F15B11/22
摘要： PROBLEM TO BE SOLVED: To provide a synchronization controller for a hydraulic motor capable of quickly synchronizing two winch drums so as to prevent a cargo to be lifted from swaying, when the cargo is lifted together by two winch drums, even when load acting on the two winch drums is small and even when the load distribution differs greatly from each other. SOLUTION: The target effective pressure of first and second hydraulic motors 5, 6 based on the load distribution set by a load distribution setting device 25 is obtained from effective pressure P1 capable of supporting a cargo to be lifted W of the first and second hydraulic motors 5, 6, which is detected by pressure sensors 17 to 20. The deviation between the effective pressure P1 and the target effective pressure is obtained. A correction value that is obtained from a function (k), which decreases as the deviation and effective pressure P1 increase but increases as the deviation and P1 decrease, is added to a reference speed determined by the manipulated variable of a control lever 14 so as to obtain the target speed of the first and second hydraulic motors 5, 6. Then, a control signal corresponding to this target speed is outputted from a controller 16 to electromagnetic proportional valves 21 to 24 controlling motor controlling valves 7, 8.

2. 发明专利

JP2000240106A CONTROLLER OF HYDRAULIC SHOVEL 失效
公开(公告)号：JP2000240106A
公开(公告)日：2000-09-05
申请号：JP4579599
申请日：1999-02-24
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： TAJI HIROSHI
IPC分类号： E02F9/20 , E02F3/36 , E02F9/22
摘要： PROBLEM TO BE SOLVED: To provide a controller of a hydraulic shovel capable of efficiently carrying out work such as load hanging work or excavation work and, at the same time, promoting work efficiency. SOLUTION: A controller of a hydraulic shovel is equipped with a boom and an arm capable of being freely rotated by a plurality of hydraulic cylinders 1 and a load hanging work hook provided to the front end of the arm. In that case, it is equipped with a load detection device for detecting load acting on the load hanging work hook 39, a load determination device for determining on whether or not the load is detected by the load detection device and a load holding device acting on a load holding side oil room of at least one of the hydraulic cylinders based on the result determined by the load determination device.

3. 发明专利

JP2000240098A PIPING STRUCTURE FOR MOVING SECTION 失效
公开(公告)号：JP2000240098A
公开(公告)日：2000-09-05
申请号：JP4495799
申请日：1999-02-23
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： YOSHIKAWA SHUJI
IPC分类号： E02F3/36 , E02F9/00
摘要： PROBLEM TO BE SOLVED: To prevent the breakage of a grease feed pipe to the pin device of a work machine and to efficiently feed grease. SOLUTION: A plurality of work machine components are rockably connected by a pin device 34 constituted of a tubular boss 35 and a pivotal support pin 36 inserted into the boss 35 in a work machine 4. The work machine 4 is provided with a grease feed pipe 30 feeding grease to the pin device 34 and a grease feed port 37 provided on the pin device 34. The grease feed pipe 30 is arranged to surround the outer periphery of the boss 35 in the peripheral direction and is connected to the grease feed port 37.

4. 发明专利

JP2000233650A COOLING DEVICE FOR CONSTRUCTION MACHINE 失效
公开(公告)号：JP2000233650A
公开(公告)日：2000-08-29
申请号：JP3843599
申请日：1999-02-17
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： SAGI KAZUYUKI
IPC分类号： E02F9/00 , B60K11/04 , F01P11/12
摘要： PROBLEM TO BE SOLVED: To prevent the nipping accident and improve the assembling work by constituting a protecting device for covering a cooling fan from a guard consisting of a rough-mesh lattice-like strength member and a fine-mesh guard net for covering the guard. SOLUTION: A guard 5 consisting of a substantially lattice-shaped strength member having a cylindrical part 5a for covering the circumference of a cooling fan 31 and a disc part 5b for covering one surface on an engine 30 side is provided between a radiator 32 and the engine 30. The circumference of the guard 5 is covered with a guard net 6 that is one of attachable and detachable protecting devices. The guard net 6 is formed in a mesh by use of fiber, and the mesh of the net is set small, compared with of the lattice mesh of the guard 5. According to this, the nipping accident to the cooling fan 31 can be prevented. Since the guard net 6 is constituted attachably and detachably, the guard net 6 can be removed and easily cleaned even if dust is adhered thereto.

5. 发明专利

JP2000227101A CONTROL DEVICE OF HYDRAULIC VALVE 失效
公开(公告)号：JP2000227101A
公开(公告)日：2000-08-15
申请号：JP2924299
申请日：1999-02-05
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： YAMASHITA KOJI
IPC分类号： F15B11/00
摘要： PROBLEM TO BE SOLVED: To prevent overheat of an engine by opening a flow control valve of a bypass oil passage which passes a delivery oil passage of a hydraulic pump and a hydraulic oil tank when an operation state is detected and a temperature of a cooling water is higher than a predetermined temperature. SOLUTION: When a temperature of engine cooling water is lower than a set temperature, an operation of a remote control valve 13 is detected by a pressure sensor 14. Only when a pedal 13a is operated, a signal for fully closing a bypass flow control valve 15 is outputted from a controller 17 to an electromagnetic proportional valve 18 to make a pilot port 27 operate, whereby all flow from a hydraulic pump 9 is supplied to a hydraulic cylinder 11. Next, when an operation state of the cylinder 11 is detected by the sensor 14 and a temperature detected by a cooling water temperature sensor 19 rises to a predetermined temperature, the valve 15 divides the flow from the pump 9 between a flow to the cylinder 11 and a flow for returning from the valve 15 to the hydraulic oil tank, in response to the cooling water temperature. Accordingly, hydraulic oil to the hydraulic cylinder 11 is reduced, and load of the pump 9 is reduced, whereby overheat of an engine 8 can be prevented.

6. 发明专利

JP2000207046A MANUAL OPERATING DEVICE FOR CONSTRUCTION MACHINE 失效
公开(公告)号：JP2000207046A
公开(公告)日：2000-07-28
申请号：JP10283699
申请日：1999-04-09
申请人： YUTANI JUKO KK
发明人： HANAMOTO TAKAHIRO
IPC分类号： E02F9/16 , B66C13/56 , G05G1/04
摘要： PROBLEM TO BE SOLVED: To return a control lever to a projected position when it is operated by providing the control lever and a lever stand in such an arrangement as not to obstruct entrance lexit into from an operator cab and also simply storing the control lever where the upper part of the lever is curved in a crank shape. SOLUTION: A control valve 5 operated by a control lever 16 is attached to a lever stand 4 provided on the floor in an operator cab in a horizontally forward state, and the lever 16 is placed in front of the stand 4, connected to the valve 5 around a lever spindle 9 through a lever supporting bracket 8 in a turnable way and provided vertically.

7. 发明专利

JP2000204590A SEALING STRUCTURE OF CONSTRUCTION MACHINE 失效
公开(公告)号：JP2000204590A
公开(公告)日：2000-07-25
申请号：JP629999
申请日：1999-01-13
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： SAITO SHIGEAKI , CHIKUANA TAKASHI
IPC分类号： E02F9/00 , B60K11/04 , F01P3/18
摘要： PROBLEM TO BE SOLVED: To ensure good built-up efficiency as well as the stable securement of sealing efficiency of a sealing member fixed to the peripheral surface of an air conditioner in an engine room of a construction machinery. SOLUTION: This sealing structure of a construction machine is equipped with an engine, a cooling fan mounted to the engine, a first cooling device set by meeting the cooling fan, a second cooling device set in parallel with the first cooling device, an engine room storing the engine therein and a sealing member for closing between at least a side section of the first cooling device and a wall surface forming section of the engine room meeting the side section and, at the same time, piping member for supplying and discharging the cooling objective fluid to the second cooling device is made to pass around below the side of the first cooling device. Then, the sealing member includes first sealing members 40a, 40b and 40c fixed to at least the side section of the first cooling device and a second sealing member 41 forming insertion grooves 42 for inserting the piping member and, at the same time, fixing one side to the wall surface forming section, and the first sealing members and second sealing member are so formed that the other side of the second sealing member and upper surface are in a state to adhere to the first sealing members 40a, 40b and 40c.

8. 发明专利

JP2000192505A CONSTRUCTION MACHINE 失效
公开(公告)号：JP2000192505A
公开(公告)日：2000-07-11
申请号：JP37069498
申请日：1998-12-25
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： MIZUKAWA SATOSHI , ODA SHIGEYUKI , IWAMITSU HIROAKI
IPC分类号： E02F9/00
摘要： PROBLEM TO BE SOLVED: To reduce the time and labor concerning the formation of the outer shape of an upper part revolving structure side surface and enhance the efficiency of the assembling workability by mounting a hydraulic fluid tank-side panel on the upper part revolving structure without being directly supported by a hydraulic fluid tank. SOLUTION: A fuel tank 33e, a hydraulic fluid tank 40 and a side cover bracket 10 are installed on an upper frame 41 while regulating their positions to prescribed positions, respectively, so as to form the outer shape of an upper part revolving structure side surface. A hydraulic fluid tank-side panel 111 is arranged so that bolt holes 15a, 16a are matched to bolt holes 15, 16 and fixed by bolts. Namely, the hydraulic fluid tank-side panel 11 is mounted on the fuel tank 33e and the side cover bracket 10. According to this, since the hydraulic fluid tank-side panel is never directly mounted on the hydraulic fluid tank, the regulation of the hydraulic fluid tank panel after the positional regulation of the hydraulic fluid tank is dispensed with, and the shortening of time and reduction in labor in the assembling can be attained.

9. 发明专利

JP2000191286A SENSING METHOD AND DEVICE FOR ACTUAL LOAD OF CRANE 失效
公开(公告)号：JP2000191286A
公开(公告)日：2000-07-11
申请号：JP36528598
申请日：1998-12-22
申请人： YUTANI JUKO KK
发明人： FUJIMOTO YOSHIAKI , ISHIHARA HIDEAKI
IPC分类号： B66C23/90
摘要： PROBLEM TO BE SOLVED: To heighten the sensing accuracy by correcting an error of actual load originating from a change in the component of the own weight of boom caused by an additional weight, etc. SOLUTION: The total load and boom angle measured by a load sensor 8 and a boom angle sensor 9 are entered into a calculating means 12. On the basis of the measurements, the calculating means 12 determines the component of the own weight of the boom among the total load and the actual load acting by a suspension load and adds a corrective value in which a change in the component of the own weight of the boom caused by additional weight, etc., is taken, into account, to the calculation value of the actual load when a correction start signal is fed by a correction start switch 11.

10. 发明专利

JP2000185557A CABIN WINDOW FITTING STRUCTURE FOR WORK VEHICLE 失效
公开(公告)号：JP2000185557A
公开(公告)日：2000-07-04
申请号：JP36777098
申请日：1998-12-24
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： MURAKAMI YOSHIHIRO , KOJIMA KENTA , MORITA HIROSHI
IPC分类号： B60J1/00 , B60J10/02
摘要： PROBLEM TO BE SOLVED: To ensure connecting the glass window and cabin frame without pushing out the outer frame provided as a seal. SOLUTION: This cabin window fitting structure is configured by a window member 2, a cabin frame 1 positioned on the inner side of the window member 2, and a seal portion 3 that seals the window member to be fitted onto an opening rim 1c of the window in the cabin frame 1. The window member 2 is fit to one 3a of a pair of groove portions that face in opposing directions of the seal portion 3 with a roughly S-shaped cross-section. The opening rim 1c of the window in the cabin frame is fit to the other groove 3b. This structure comprises shape-preserving means 4, 3c for maintaining the cross-sectional shape of the seal portion 3 when the window is fitted.

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