Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
  • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
  • B66D1/28—Other constructional details
  • B66D1/40—Control devices
  • B66D1/42—Control devices non-automatic
  • B66D1/44—Control devices non-automatic pneumatic of hydraulic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C13/00—Other constructional features or details
  • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
  • B66C13/54—Operator's stands or cabins
  • B66C13/56—Arrangements of handles or pedals
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
  • B66C23/62—Constructional features or details
  • B66C23/84—Slewing gear
  • B66C23/86—Slewing gear hydraulically actuated

Definitions

• the present invention relates to a boom swing control device for an oil E-driven crane having a boom swing device driven by oil E.
• this type of crane incorporates a crossover relief valve with a manual open / close valve in the hydraulic circuit of the boom turning oil EE motor.
• the brake force on the hydraulic motor is released to allow the hydraulic motor, that is, the boom, to freely rotate, thereby allowing the boom to be turned.
• a winch operation for lifting a load must be performed with one hand, and at the same time, a manual open / close valve for a brake must be opened / closed with the other hand.
• the operation becomes complicated, and there is a problem in terms of workability and operability such that it is not possible to perform other operations, such as raising and lowering the boom, simultaneously with the inch operation.
• the present invention has solved the above-mentioned problem.
• a brake circuit incorporated in a boom swing hydraulic circuit is opened and closed using an electromagnetic switching valve. Attach the switch for the electromagnetic switching valve to the operation lever for the pinch.)) To perform the anti-dragging operation at the same time as the winch operation.
• FIG. 1 is a hydraulic circuit diagram of a boom slewing device in a conventional hydraulically driven crane
• FIG. 2 is a hydraulically driven slewing device having a boom slewing control device according to an embodiment of the present invention
• FIG. 5 is an enlarged view of a portion 1 of FIG. 2
• FIG. 4 is a hydraulically driven crane according to another embodiment of the present invention.
• Hydraulic circuit diagram of the boom swivel and the pinch device of the motor Fig. 5 is the enlarged view of the V section in Fig. 4,
• FIG. 6 is a hydraulic circuit diagram of a boom swing and a pinch device of a hydraulically driven crane provided with a boom swing control device according to another embodiment of the present invention.
• FIG. 1 is a hydraulic circuit diagram of a boom swivel unit in a conventional hydraulically driven crane.
• a manual opening / closing valve 18 and a relief valve are provided in the hydraulic circuit of the hydraulic motor 2 for boom rotation, and the A crossover relief valve 6 having an inlet is incorporated, and the manual on / off valve 18 is opened to operate the crossover relief valve 6.
• the brake force on the hydraulic motor 2 is released, and the hydraulic motor 2 (that is, the boom) can be turned freely, whereby a lateral pull load is applied to the boom.
• 4 is an oil tank
• 7 is a high pressure control valve
• 12 is an E force control valve.
• FIG. 2 is a hydraulic circuit diagram of a boom swivel control device for a hydraulically driven crane according to an embodiment of the present invention.
• FIG. 2 is a hydraulic circuit X for a boom swivel device and a flinch.
• a hydraulic circuit Y for the device is shown.
• the hydraulic circuit for the boom slewing device (hereinafter referred to as the slewing hydraulic circuit) X is a four-port, five-position manual switching valve (hereinafter simply referred to as a slewing switch) for connecting the hydraulic pump 1 and the slewing hydraulic motor 2 to each other.
• a turning main circuit Q which is connected to a hydraulic oil supply / discharge oil passage 21 and an oil passage 22 via 3 to enable the hydraulic motor 2 to rotate forward and reverse.
• a boom turning control circuit P connected between the hydraulic oil supply oil passage 21 and the oil passage 22.
• the boom swivel control circuit P includes a pilot-type crawler composed of a relief valve 10 having a pilot port and a shuttle valve 11 described later.
• the oil pressure relief line ⁇ and the negative pressure prevention oil line 24 composed of a pair of check valves 9 and 9 are connected in parallel between the hydraulic oil line 2 and the hydraulic oil line 22.
• This pilot-operated crossover relief valve ⁇ is used to set the external pilot port.
• the valve is opened so that the hydraulic oil in the hydraulic oil passage 21 or 22 can be circulated in the directions indicated by arrows C-D.
• the pilot-type cross-over relief valve 6 connects an E-force control valve 7 set to a high-pressure EE force and a solenoid on-off valve 8 in parallel to the pilot oil passage 25. To form an external pilot port. Downstream of the solenoid on-off valve 8, an E-force control valve 12 is provided downstream of the solenoid on-off valve 8, an E-force control valve 12 is provided downstream of the solenoid on-off valve 8.
• the pressure control valve 12 is for setting the pressure in the pipe oil passage 25 to a low pressure when the electromagnetic on-off valve 8 is opened.
• the pilot-type cross-over relief valve 6 is controlled by the relief valve 7 when the solenoid on-off valve 8 is in the closed position, and is also controlled by the solenoid on-off valve.
• the valve opening pressure is controlled by the pressure control valve 12.
• the switching switch 51 of the solenoid 30 of the solenoid on-off valve 8 is provided on a later-described operation lever 58 for a winch]). 51 The on / off operation of 1 opens and closes the solenoid on-off valve 8 and switches it to the closed position.
• the negative S prevention oil passage 24 supplies the hydraulic oil from the oil tank to the suction-side oil passage that causes an insufficient oil amount when the motor 2 performs the pump operation. It acts to prevent the oil passage from becoming negative EE.
• winch hydraulic circuit Y Hydraulic circuit for winch device (hereinafter referred to as winch hydraulic circuit) Y is hydraulic E pump 55 and hydraulic motor for winch dram drive 56 and Actuated via 4-port 5-position manual switching valve 57 (hereinafter referred to as winch switching valve)?
• the oil E motor ⁇ 6 is rotated forward and reverse by switching the winch switching valve 37 ′. You can do this.
• the reference numeral 45 indicates a return circuit when the winch is wound.]-A lock circuit provided on the oil passage side (shown in the drawing. In the embodiment, the oil passage 41) is a relief valve. Consists of 4 5 and check valve 4 4, hanging! )
• the oil / motor 50 rotates and suspends due to the weight of the load. It acts to prevent the load from falling.
• an operation lever 58 provided on the winch switching valve 57 has a grip portion 59 at its upper end as shown in FIG. 5, and moves the grip portion 59.
• a switching switch 51 for the electromagnetic on-off valve 8 is provided on a side surface 59 a of the grip portion 59.
• the switch 51 is provided at a position where it touches the belly of the driver's thumb when the driver grips the operation lever holding portion 59. Therefore, the driver can simultaneously perform the one-inch operation and the switching operation of the switch 31 with one side.
• the solenoid-operated on-off valve 8 is closed, so that the pie port-type shut-off relief valve 6 applies the pressure in the oil passage 22 (in other words, , The pilot oil passage 25) does not open until it reaches the set pressure of the E-force control valve 7. Since the E-force control valve 7 is set to a high E pressure, the oil pressure motor 2 is locked at the high king (break state)! ) The boom cannot be turned and a lateral pull load is applied.
• the pilot The type cross-over relief valve ⁇ is the pressure in the oil passage 22 up to the set pressure of the pressure control valve 12 (that is, the EE force in the pipe outlet oil passage 25). Opens when the pressure rises. Since the E-force control valve 12 is set to a low E pressure, the hydraulic motor 2, that is, the boom, where a weak brake force acts on the oil E motor 2, The vehicle can be freely turned at a smooth speed without suddenly turning to the position where the lateral load is applied by the horizontal pull. Therefore the boom
• the switch 31 is pushed so that the hydraulic motor 2 or the boom can be turned freely, so that the boom is extended for a long time. In order to use the switch in a freely rotatable state, it is necessary to keep the switch on and off during that time.
• the boom swing control device can be used as a brake device for turning the boom. Further, in the above-described embodiment, one cross over relief valve was described, but the oil passage 22 was moved from the oil passage 21 to the oil passage 22.
• FIG. 5 is a view showing a hydraulic circuit of a hydraulic drive-type crane according to another embodiment of the present invention. You may do it. That is, in FIG. 5, reference numeral 50 denotes a check valve 51, 52, 58, 59 connected to the bridge, which is connected to one of the high pressure sides of the oil passages 21 and 22. There is a valve so that the oil S power of the oil passage works. The cross-over-relief valve 50 is moved by the movement of the piston 54 provided in the oil chamber 53 so that the pressure setting spring 55 is elastically deformed and re-formed.
• Reference numeral 5 denotes a valve downstream of the check valves 51 and 52 for allowing the oil on the high pressure side of one of the oil passages 21 and 22 to act on the piston 54 of the oil chamber 5S.
• This is a pilot oil channel.
• Reference numeral 57 denotes an electromagnetic on-off valve which is provided in a non-excited state and provided for controlling the opening and closing of the pilot oil passage 56.
• Reference numerals 58 and 59 denote from the upper one of the oil passages 21 and 22 when the above-mentioned crossover valve 50 is opened. This is a check valve for flowing oil to the oil passage on the low-pressure side of either of the oil passages 21 and 22. Therefore, this TO.
• the hydraulic swivel control device for a hydraulically driven crane is a conventional type of crane oil

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Fluid-Pressure Circuits (AREA)
• Jib Cranes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=13130527

Family Applications (1)

Country Status (2)

Cited By (8)

Families Citing this family (1)

Citations (3)

Family Cites Families (5)

• 1980
  • 1980-04-30 JP JP1980060039U patent/JPS6040553Y2/ja not_active Expired
• 1981
  • 1981-04-28 WO PCT/JP1981/000100 patent/WO1981003165A1/ja unknown

Patent Citations (3)

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