CN107001013B - The operating device of crane - Google Patents
The operating device of crane Download PDFInfo
- Publication number
- CN107001013B CN107001013B CN201580065264.8A CN201580065264A CN107001013B CN 107001013 B CN107001013 B CN 107001013B CN 201580065264 A CN201580065264 A CN 201580065264A CN 107001013 B CN107001013 B CN 107001013B
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- China
- Prior art keywords
- switching control
- circuit
- control valve
- promotion
- suspension hook
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B66C23/88—Safety gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/06—Cranes in which the lifting movement is done with a hydraulically controlled plunger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Control And Safety Of Cranes (AREA)
- Jib Cranes (AREA)
Abstract
The present invention provides a kind of operating device of crane, even if when suspension hook stores operation, before becoming promotion state, the action of hydraulic actuator is also very fast, workability is also preferable.The operating device of the crane of the present invention has：Promotion detector (28) is crossed, detection suspension hook (24) crosses promotion state；Capstan winch is with hydraulic actuator (32)；Suspension hook stores switching control valve (44), switches the direction of the hydraulic oil supplied with hydraulic actuator (32) to capstan winch；And skimmer circuit (50), set circuit pressure；And, in the case where promotion state was not detected in promotion detector (28) excessively, circuit pressure is set as high pressure by skimmer circuit (50), in the case where promotion detector (28) excessively detected that promotion state and suspension hook storage switching control valve (44) switched in raised position, circuit pressure is set as low pressure by skimmer circuit (50).Because suspension hook (24) be in it is non-cross promotion state in the case of circuit pressure be set to high pressure, therefore, even if when suspension hook stores operation, before becoming promotion state, the action of hydraulic actuator is also very fast, workability is also preferable.
Description
Technical field
The present invention relates to a kind of operating devices of crane.More specifically, it is related to one kind to contact into suspension hook is exercised
Crane arm and the operating device of the crane of suspension hook stowing operation stored.
Background technology
A kind of suspension hook operating device of crane is disclosed in patent document 1.In the suspension hook operating device, as pair twist
The switching valve that the action of disk motor switches over also separately switches equipped with suspension hook storage other than capstan winch switching valve
Valve.When hoisting operation, the promotion or decline of suspension hook are carried out with switching valve by operating capstan winch.On the other hand, suspension hook storage is made
When industry, is promoted with switching valve by operation suspension hook storage and store suspension hook.
In addition, feather valve is equipped in suspension hook operating device, when suspension hook became promotion state by the hydraulic pressure of main line
Oil puts back to oil tank.Suspension hook operating device is configured to：It is at a distance from the front end lower part for becoming crane arm is between suspension hook top
In the case of specific length promotion state excessively below, stop steeving for the promotion of suspension hook, the elongation of crane arm or crane arm
Each action prevents the collision of crane arm and suspension hook.
In the case where storing suspension hook, need that suspension hook is made further to be promoted from promotion state is crossed.Therefore, suspension hook operating device
It is configured to：Suspension hook storage switching valve is operated, even if as a result, also being capable of lifting hook in the case where crossing promotion state.
From suspension hook storage with switching valve be connected to capstan winch motor lift line storage pipeline and return pipeline it
Between be provided with storage overflow valve.The pressure of storage overflow valve is set to lower than main overflow valve.Storage is constituted with overflow valve
For：When suspension hook is abutted to the front end of crane arm, the front end of suspension hook and crane arm not will produce damage.
In general, suspension hook storage operation be operation suspension hook storage is with switching valve rather than capstan winch carries out suspension hook with switching valve
It is promoted and is stored.If the reason is that operating capstan winch with switching valve come lifting hook, then way can become promotion shape wherein
State and cause the promotion of suspension hook to stop.In addition, typically, suspension hook can not only store suspension hook when storing operation, can also make lifting
Arm shrinks and lodges to store crane arm.Therefore, while the promotion of suspension hook operates, it can also carry out the contraction of crane arm and fall
The operation of volt.
But if operation suspension hook storage switching valve, whether pipe lifting hook was not in promotion state, storage overflow
Valve can all make circuit pressure become low pressure.Accordingly, there exist the actions of hydraulic actuator, and slack-off, operational poor, suspension hook storage is made
The more time-consuming problem of industry.
Existing technical literature
Patent document 1：Japanese Patent Laid-Open 2001-31375 bulletins
Invention content
Problems to be solved by the invention
The present invention is in view of said circumstances, and its purpose is to provide a kind of operating device of crane, the operations of the crane
Even if device, when suspension hook stores operation, before becoming promotion state, the action of hydraulic actuator is also very fast, workability
Preferably.
Technical means to solve problem
The operating device of the crane of the first invention be have crane arm and from the crane arm hang under suspension hook crane
Operating device, which is characterized in that have：Promotion detector is crossed, that detects the suspension hook crosses promotion state；And hydraulic pressure returns
Road makes the crane act；Also, the hydraulic circuit has：Capstan winch hydraulic actuator executes the suspension hook
It is promoted or is declined；Suspension hook stores switching control valve, switches the direction of the hydraulic oil supplied with hydraulic actuator to the capstan winch；
Capstan winch switching control valve switches the direction of the hydraulic oil supplied with hydraulic actuator to the capstan winch；And skimmer circuit,
Set circuit pressure；Promotion state was not detected in the promotion detector excessively and suspension hook storage switching control valve is cut
It changes in the case of raised position, circuit pressure is set as high pressure by the skimmer circuit, and the detection of promotion detector is crossed described
To cross promotion state and the suspension hook storage switching control valve switch in raised position in the case of, the skimmer circuit will return
Road pressure is set as low pressure, and promotion state and the capstan winch switching control Vavle switching were detected in the promotion detector of crossing
In the case of raised position, circuit pressure is set as unloading pressure by the skimmer circuit.
The operating device of the crane of second invention is the operating device of the crane according to the first invention, feature
It is, the hydraulic circuit has capstan winch switching control valve, and the capstan winch switching control Vavle switching causes the capstan winch with hydraulic pressure
The direction of the hydraulic oil of dynamic device supply detected promotion state and the capstan winch switching control in the promotion detector of crossing
For Vavle switching in the case of raised position, circuit pressure is set as unloading pressure by the skimmer circuit.
The operating device of the crane of third invention is the operating device of the crane according to the first invention, feature
It is, the skimmer circuit has：Overflow main valve, setting is between working connection and return oil circuit；High pressure guiding oil circuit,
Connect the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；Low pressure guiding oil circuit, connects the overflow master
Back pressure guiding Bu Kou and the return oil circuit of valve；The sub- valve of high pressure kicks, setting is in the high pressure on guiding oil circuit；Low pressure
The sub- valve of overflow, setting is in the low pressure on guiding oil circuit；And low pressure switching control valve, setting are used in the low pressure
It guides on oil circuit, detected that promotion state and the suspension hook were stored switching control valve and switched in the promotion detector of crossing
In the case of raised position, the low pressure is made to guide oil communication.
The operating device of the crane of 4th invention is the operating device of the crane according to the first invention, feature
It is, the skimmer circuit has：Overflow main valve, setting is between working connection and return oil circuit；High pressure guiding oil circuit,
Connect the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；Low pressure guiding oil circuit, connects the overflow master
Back pressure guiding Bu Kou and the return oil circuit of valve；The sub- valve of high pressure kicks, setting is in the high pressure on guiding oil circuit；Low pressure
The sub- valve of overflow, setting is in the low pressure on guiding oil circuit；Switching control valve when crossing promotion, setting is in the low pressure with drawing
Oil Guide road made the low pressure guide oil communication in the case where the mistake promotion detector detects promotion state；With
And switching control valve when suspension hook storage, setting, on guiding oil circuit, switching control valve are stored in the suspension hook in the low pressure
In the case of switching in raised position, the low pressure is made to guide oil communication.
The operating device of the crane of 5th invention is the operating device according to third or the 4th invention crane,
It is characterized in that, the hydraulic circuit has capstan winch switching control valve, the capstan winch switching control Vavle switching uses the capstan winch
The direction of the hydraulic oil of hydraulic actuator supply, the skimmer circuit have：Unloading guiding oil circuit, connects the overflow master
Back pressure guiding Bu Kou and the return oil circuit of valve；And unloading switching control valve, setting is in unloading guiding oil
On the road, it detected promotion state in the detector of promotion excessively and the capstan winch switching control valve switches in raised position
In the case of, so that the unloading is guided oil communication.
The operating device of the crane of 6th invention is according to the operating device of the crane described in the 4th invention, feature
It is, the hydraulic circuit has capstan winch switching control valve, and the capstan winch switching control Vavle switching causes the capstan winch with hydraulic pressure
The direction of the hydraulic oil of dynamic device supply, the skimmer circuit have：Capstan winch guides oil circuit, connects low pressure guiding oil circuit
With the return oil circuit；And switching control valve when being promoted, setting switch on capstan winch guiding oil circuit in the capstan winch
In the case that control valve switches in raised position, the capstan winch is made to guide oil communication.
The effect of invention
According to first, third and the 4th invention, in the case where suspension hook is in non-promotion state excessively, circuit pressure is set
Be set to high pressure, therefore, even if when suspension hook stores operation, before becoming promotion state, the action of hydraulic actuator also compared with
Soon, workability is also preferable.In addition, in the case where suspension hook was in promotion state, when carrying out suspension hook stowing operation, circuit pressure
Power is set to low pressure, therefore, when suspension hook is abutted to crane arm, can prevent suspension hook and crane arm from damaging.
According to the second, the 5th and the 6th invention, in the case where suspension hook was in promotion state, when carrying for progress suspension hook
When lift operations, circuit pressure is set to unloading pressure, therefore can prevent the collision of crane arm and suspension hook.
Description of the drawings
Fig. 1 is the hydraulic circuit of the operating device of the crane of the first embodiment of the present invention.
Fig. 2 is the circuit of the operating device of the crane.
Fig. 3 is the hydraulic circuit of the operating device of the crane of second embodiment of the present invention.
Fig. 4 is the circuit of the operating device of the crane.
Fig. 5 is the hydraulic circuit of the operating device of the crane of third embodiment of the present invention.
Fig. 6 is the circuit of the operating device of the crane.
Fig. 7 is the side view of loading type crane truck.
Specific implementation mode
Then, with reference to the accompanying drawings, embodiments of the present invention will be described.
(first embodiment)
(loading type crane truck)
The operating device of the crane of the first embodiment of the present invention is arranged on loading type crane truck CR.It is first
First, the structure of loading type crane truck CR is illustrated.
As shown in fig. 7, loading type crane truck CR is the vehicle between the driver's cabin 11 and container 12 of general truck 10
Minor crane 20 is carried on frame 13 and is obtained.
Minor crane 20 has the pedestal 21 being fixed on vehicle frame 13, is arranged to relative to pedestal 21 and circles round
Pillar 22 and crane arm 23 in the upper end of pillar 22 is set in a manner of it can rise and fall.It is built-in with capstan winch in pillar 22.It will
Wirerope is guided from the capstan winch to the front end of crane arm 23, on the pulley of 23 front end of crane arm, and is connected to suspension hook
24, as a result, suspension hook 24 is hung down from the front end of crane arm 23.It is arranged on a left side for pedestal 21 in addition, minor crane 20 has
The outrigger device 25,26 of right both sides.These crane equipments are acted by hydraulic circuit described later.For grasping
The operating lever group 27 for making hydraulic circuit is arranged in the left and right sides of pedestal 21.
(crossing promotion detector)
On minor crane 20, be provided with the promotion state excessively of detection suspension hook 24 crosses promotion detector 28.It is so-called to hang
Hook 24 cross promotion state, it is intended that the distance between the front end lower part of crane arm 23 and the top of suspension hook 24 specific length with
Under state.The structure for crossing promotion detector 28 is not particularly limited, as long as the promotion state excessively of suspension hook 24 can be detected,
For example, with lower structure.It was provided in the front end of crane arm 23 and promotes detection switch, hung oneself in the movement arm of the switch
Under have ingot hammer.When suspension hook 24 be elevated and when so that becoming specific length or less at a distance from the front end lower part of crane arm 23,
Ingot hammer makes movement arm rotate up by the top of suspension hook 24.The ON/OFF for crossing promotion detection switch as a result, is cut
It changes, so as to detect the promotion state excessively of suspension hook 24.
Such minor crane 20 constituted is by combining the flexible of crane arm 23, fluctuating, convolution and suspension hook above
24 promotion and decline, can realize the hoisting operation freighted and unloaded in solid space.Minor crane 20 is constituted
For：In the case where suspension hook 24 was in promotion state, stop the action of further lifting hook 24, that is, stop crane arm 23
Elongation, crane arm 23 steeve and each action of the promotion of suspension hook 24, thus prevent the collision of crane arm 23 and suspension hook 24.
In addition, in suspension hook stores operation, from the further lifting hook 24 of promotion state is crossed, so that suspension hook 24 is contacted with crane arm 23 and add
With storage.While suspension hook stores operation, also into exercising, crane arm 23 is shunk and the crane arm of lodging stores operation.
(hydraulic circuit)
Then, the hydraulic circuit 30 of minor crane 20 is illustrated.
As shown in Figure 1, hydraulic circuit 30 has, crane arm is flexible to use hydraulic cylinder 31, capstan winch hydraulic motor 32 and lifting
Arm fluctuating uses hydraulic cylinder 33 as the hydraulic actuator 31~33 for making crane equipment act.Pass through the flexible hydraulic cylinder of crane arm
31 action executes the flexible of crane arm 23.By capstan winch hydraulic motor 32 action come execute suspension hook 24 promotion or under
Drop executes the fluctuating of crane arm 23 by the action of crane arm fluctuating hydraulic cylinder 33.
Furthermore " capstan winch hydraulic motor 32 " is " capstan winch hydraulic actuator " equivalent to the record in the claim.Separately
Outside, about the crane arm convolution hydraulic motor of convolution of execution crane arm 23 and stretching for execution outrigger device 25,26
The outrigger hydraulic cylinder of contracting, the illustration is omitted.
In order to supply hydraulic oil to hydraulic actuator 31~33, equipped with the hydraulic pressure of discharge hydraulic oil in hydraulic circuit 30
The oil tank 35 of pump 34 and storage hydraulic oil.It is connected with working connection 36 in the outlet of hydraulic pump 34, return is connected on oil tank 35
Oil circuit 37.Working connection 36 and return oil circuit 37 are connect via switching control valve 41~44 with hydraulic actuator 31~33.Furthermore
It is so-called " working connection " in this specification, it is intended that guide the hydraulic oil for being supplied from hydraulic power source to the oil of hydraulic actuator 31~33
Road.In addition, so-called " returning to oil circuit ", it is intended that guiding the hydraulic oil being discharged from hydraulic actuator 31~33 to the oil of oil tank 35
Road.
Switching control valve 41~44 is flexible switching control valve 41, capstan winch switching control valve 42, fluctuating switching control valve 43
And suspension hook stores switching control valve 44.Crane arm is flexible with flexible switching control valve 41 is connected on hydraulic cylinder 31, and capstan winch is used
It is connected with capstan winch switching control valve 42 on hydraulic motor 32, crane arm fluctuating is with being connected with fluctuating switching control valve on hydraulic cylinder 33
43.These switching control valves 41~43 can control the direction for the hydraulic oil for being supplied from hydraulic pump 34, to switching control these
The action of hydraulic actuator 31~33.In addition, other than capstan winch switching control valve 42, capstan winch is also connected with on hydraulic motor 32
There is suspension hook to store switching control valve 44, the direction of hydraulic oil is also switched by suspension hook storage switching control valve 44.
Switching control valve 41~44 is three switching control valves.Flexible switching control valve 41, which has, makes the crane arm 23 shrink
Retracted position stops the extended position for executing flexible centre position and crane arm 23 being made to extend.Capstan winch switching control valve 42
With raised position, stopping execution promotion and the centre position declined and the decline for making suspension hook 24 decline for so that suspension hook 24 is promoted
Position.Fluctuating switching control valve 43 have make position of steeving that crane arm 23 steeves, stop executing the centre position to rise and fall and
The lodging location for making crane arm 23 lodge.Suspension hook storage switching control valve 44 has the raised position for making suspension hook 24 be promoted, stops
The down position for executing promotion and the centre position declined and suspension hook 24 being made to decline.
It is separately installed with operating lever in switching control valve 41~44.Switch above-mentioned valve by the way that the operating lever is manually operated
Core position.Operating lever in switching control valve 41~44 is set to the left and right two of pedestal 21 in the form of operating lever group 27
Side (with reference to Fig. 7).Operating personnel can be such that crane equipment acts by operating operating lever group 27.
(skimmer circuit)
Equipped with the skimmer circuit 50 for setting its circuit pressure on hydraulic circuit 30.Herein, so-called " circuit pressure ", meaning
Refer to the maximum pressure of the hydraulic pressure in hydraulic circuit 30.Skimmer circuit 50 by suspension hook 24 cross promoted/it is non-cross promotion state and
Circuit pressure is set as any one of high pressure, low pressure or unloading pressure by the spool position of switching control valve 41~44.Hydraulic oil
Flow it is more, the hydraulic pressure in hydraulic circuit 30 is higher, when hydraulic pressure be higher than circuit pressure when, from overflow valve be discharged hydraulic oil.
In the case that circuit pressure is set to high pressure, the delivery flow from overflow valve is less, supply to hydraulic actuator 31~33
The flow of hydraulic oil is more, therefore can make 31~33 high speed motion of hydraulic actuator.It is set to the feelings of low pressure in circuit pressure
Under condition, the delivery flow from overflow valve is more, and the flow of the hydraulic oil of supply to hydraulic actuator 31~33 is less, therefore liquid
The action of hydraulic actuator 31~33 becomes low speed.In the case where circuit pressure is set to unloading pressure, not to hydraulic actuator 31
~33 supply hydraulic oil, therefore the action of hydraulic actuator 31~33 can be stopped.Furthermore unloading pressure is less than the pressure of low pressure
Power.
Equipped with overflow main valve 51 on skimmer circuit 50.The setting of overflow main valve 51 is in connection working connection 36 and return oil circuit
On 37 overflow oil circuit 61.In overflow main valve 51, other than the spring to exert a force towards the direction for closing spool, it is further equipped with confession
The back pressure chamber that the hydraulic oil entered from entrance Bu Kou flows into.The hydraulic action of back pressure chamber is applied in the direction for closing spool.It is logical
It crosses and controls the hydraulic pressure of the back pressure chamber, the setting pressure of overflow main valve 51 using the sub- valve 52 of high pressure kicks and the sub- valve of low pressure spill 53
It is able to be set as any one of high pressure, low pressure or unloading pressure.Then, circuit is set by the setting pressure of overflow main valve 51
Pressure.
The back pressure chamber of overflow main valve 51 is provided with back pressure guiding Bu Kou.The back pressure guiding Bu Kou of overflow main valve 51 and return oil
Road 37 is linked together by high pressure guiding oil circuit 62.In the high pressure the sub- valve of high pressure kicks 52 is provided with on guiding oil circuit 62.
In addition, the back pressure guiding Bu Kou of overflow main valve 51 is with return oil circuit 37 and then is also linked together by low pressure guiding oil circuit 63.
In the low pressure the sub- valve of low pressure spill 53 is provided with on guiding oil circuit 63.On low pressure guiding oil circuit 63 and then it was additionally provided with
Switching control valve 54 when promotion.
When on skimmer circuit 50 equipped with elongation switching control valve 41a, switching control valve 42a when being promoted, cut when steeving
Switching control valve 44a when changing control valve 43a and suspension hook storage.These switching control valves 41a~44a is three switching controls
Valve.Switching control valve 41a is corresponding with flexible switching control valve 41 when elongation, their spool links together.Therefore, work as switching
When the spool position of flexible switching control valve 41, the spool position of switching control valve 41a is also linkedly cut with it when elongation
It changes.Similarly, switching control valve 42a is corresponding with capstan winch switching control valve 42 when promotion, switching control valve 43a and fluctuating when steeving
Switching control valve 43 corresponds to, and switching control valve 44a is corresponding with suspension hook storage switching control valve 44 when suspension hook is stored, their spool
Respectively link together.
In low pressure on guiding oil circuit 63, Bu Kou is guided to be sequentially provided with towards oil circuit 37 is returned from the back pressure of overflow main valve 51
Switching control valve 44a and the sub- valve of low pressure spill 53 when switching control valve 54 when crossing promotion, suspension hook storage.In addition, low pressure is with drawing
When switching control valve 54 and suspension hook are stored when crossing promotion on Oil Guide road 63 3 guiding oil circuits are branched between switching control valve 44a
(flexible guiding oil circuit 64, capstan winch guiding oil circuit 65, rise and fall guiding oil circuit 66).These guiding oil circuits 64~66 the other end with return
Oil return line 37 connects.The switching control valve 41a when being provided with elongation on flexible guiding oil circuit 64.It is set on capstan winch guiding oil circuit 65
Switching control valve 42a when being equipped with promotion.Rise and fall be provided on guiding oil circuit 66 steeve when switching control valve 43a.
Switching control valve 41a makes flexible guiding in the case where flexible switching control valve 41 switches in extended position when elongation
Oil circuit 64 is connected to, and flexible guiding oil circuit 64 is cut off except this.Switching control valve 42a switches in capstan winch and controls when promotion
Valve 42 processed is connected to capstan winch guiding oil circuit 65 in the case of switching in raised position, capstan winch guiding is cut off except this
Oil circuit 65.Acting when facing upward switching control valve 43a and switching in the in the case of of steeving position in fluctuating switching control valve 43 makes fluctuating guide
Oil circuit 66 is connected to, and cut-out, which rises and falls, except this guides oil circuit 66.Switching control valve 44a is received in suspension hook when suspension hook is collected
Receiving is connected to low pressure guiding oil circuit 63 in the case that switching control valve 44 switches in raised position, incision the case where except this
Disconnected low pressure guiding oil circuit 63.
Furthermore the switching control in switching control valve 54, suspension hook storage when crossing promotion on low pressure guiding oil circuit 63 is set
The configuration sequence of the sub- valve of valve 44a and low pressure spill processed 53 is not limited to present embodiment, when suspension hook is stored switching control valve 44a and
The position of the sub- valve of low pressure spill 53 may be reversed.In this case, three guiding oil circuits (flexible guiding oil circuit 64, capstan winch guiding
Oil circuit 65, rise and fall guiding oil circuit 66) switching control valve 54 when crossing promotion and the sub- valve of low pressure spill for guiding oil circuit 63 are used from low pressure
Bifurcated between 53.
(circuit)
Switching control valve 54 is dibit solenoid electric valve when the promotion excessively.It is controlled pair by circuit 70 shown in Fig. 2
Cross the energization of the solenoid 54s of switching control valve 54 when being promoted.Equipped with DC power supply 71 in circuit 70, in DC power supply 71
2 conducting wires 72,73 have been arranged in parallel between ground connection.The switch 28s for promoting detector 28 was provided on one conducting wire 72.This is opened
Pass 28s, to disconnect (OFF), is to be closed (ON) in non-the case where crossing promotion state the case where crossing promotion state.In conducting wire 72,73
On be provided with relay 74.Relay 74 is connected conducting wire 73 in the case where conducting wire 72 is powered, the case where conducting wire 72 powers off
Lower cut-out conducting wire 73.The solenoid 54s of switching control valve 54 when being provided with promotion on conducting wire 73.
In the case where promotion detector 28 detected promotion state excessively, switch 28s is to disconnect (OFF), 72 quilt of conducting wire
Cut-out, conducting wire 73 are cut off by relay 74, are not supplied electric power to solenoid 54s.Thus, switching control valve 54 when crossing promotion
It is switched to the position (referring to Fig.1) for making low pressure guiding oil circuit 63 be connected to.
On the other hand, the case where promotion state was not detected in promotion detector 28 (crossing promotion state status to be non-) is being crossed
Under, switch 28s is to be closed (ON), and conducting wire 72 is powered, and conducting wire 73 is powered by relay 74, is supplied electric power to solenoid 54s.
Thus, cross the position (referring to Fig.1) that switching control valve 54 when being promoted is switched to cutoff low guiding oil circuit 63.
In conclusion switching control valve 54 connects low pressure guiding oil circuit 63 in the case where crossing promotion state when crossing promotion
It is logical, the cutoff low guiding oil circuit 63 in the case of non-promotion state excessively.
(action of operating device)
Then, the action of the operating device of present embodiment is illustrated.
(1) it (crosses promotion detector 28 in non-the case where crossing promotion state in suspension hook 24 and the state that promoted was not detected
Situation) under, 54 cutoff low of switching control valve guiding oil circuit 63 when crossing promotion.Thus, which the back pressure of overflow main valve 51 is drawn
Lead Bu Kou become the connection with the sub- valve of low pressure spill 53 be cut off and the state that is only connect with the sub- valve of high pressure kicks 52.Therefore, it overflows
The setting pressure of stream main valve 51 is set to high pressure.That is, circuit pressure is set to high pressure.
In this case, no matter switching control valve 41~44 is switched to any position with any combinations, circuit pressure is all protected
It is constant to hold high pressure.Since the pressure of the hydraulic oil of supply to hydraulic actuator 31~33 is higher, hydraulic actuator 31~33
Output it is higher, even if load is larger, can also act.In addition, due to supplying to the hydraulic oil of hydraulic actuator 31~33
Flow is more, therefore can make 31~33 high speed motion of hydraulic actuator.Therefore, it is possible to easily carry out hoisting operation, in addition,
Suspension hook storage operation can easily be carried out.
As it was noted above, in suspension hook stores operation, promotion state, and operation suspension hook storage switching are crossed even in non-
Control valve 44 carrys out lifting hook 24.In addition, while suspension hook stores operation, also into exercising, crane arm 23 is shunk and what is lodged rises
Weighing arm stores operation.As described above, in the case where suspension hook 24 is in non-promotion state excessively, circuit pressure is set to high pressure,
The flow of supply to the hydraulic oil of hydraulic actuator 31~33 is more.As a result, when suspension hook stores operation, that is, i.e. convenient to operate
It is suspension hook storage switching control valve 44, before becoming promotion state, the action of hydraulic actuator 31~33 is also very fast, operation
Property is also preferable.Even if for example, executing lifting while executing the promotion of suspension hook 24 in operation suspension hook storage switching control valve 44
The contraction and lodging of arm 23, the action of hydraulic actuator 31~33 is also very fast, therefore workability is preferable, can easily carry out suspension hook
Store operation.
(2) (the case where promotion detector 28 detected promotion state is crossed) the case where suspension hook 24 was in promotion state
Under, switching control valve 54 makes low pressure guiding oil circuit 63 be connected to when crossing promotion.In this case, when suspension hook stores switching control valve 44
When being switched to raised position, switching control valve 44a is linkedly switched with it when suspension hook is stored so that low pressure guiding oil
Road 63 is connected to.Thus, which the back pressure guiding Bu Kou of overflow main valve 51 becomes the state being connect with the sub- valve of low pressure spill 53.Cause
This, the setting pressure of overflow main valve 51 is set to low pressure.That is, circuit pressure is set to low pressure.
In suspension hook stores operation, need from crossing the further lifting hook of promotion state 24.Switched by storing suspension hook
Control valve 44 is switched to raised position, even if in the case where crossing promotion state, can also be promoted and store suspension hook 24.Herein, if hanging
Hook 24 carried out suspension hook stowing operation in the case of being in promotion state, then circuit pressure is set to low pressure, therefore, in suspension hook
When 24 abuttings are to crane arm 23, it can prevent suspension hook 24, crane arm 23 from damaging.
(3) (the case where promotion detector 28 detected promotion state is crossed) the case where suspension hook 24 was in promotion state
Under, switching control valve 54 makes low pressure guiding oil circuit 63 be connected to when crossing promotion.In this case, when flexible switching control valve 41, twisting
When at least one party in disk switching control valve 42 and fluctuating switching control valve 43 is switched to hook action side, circuit pressure
Power is set to unloading pressure.Herein, so-called " hook action side ", it is intended that extended position in flexible switching control valve 41,
The position of steeving in raised position, fluctuating switching control valve 43 in capstan winch switching control valve 42.
At least one party's quilt in flexible switching control valve 41, capstan winch switching control valve 42 and fluctuating switching control valve 43
When being switched to hook action side, switching control valve 41a~43a is linkedly switched with it so that flexible guiding oil circuit
64, capstan winch guiding oil circuit 65 and at least one party's connection guided in oil circuit 66 that rises and falls.Thus, the back pressure of overflow main valve 51
Guiding Bu Kou is connect with oil circuit 37 is returned, and the hydraulic pressure of the back pressure chamber of overflow main valve 51 becomes zero.Therefore, the setting of overflow main valve 51
Pressure is set to unloading pressure.That is, circuit pressure is set to unloading pressure.
Therefore, if carrying out in the case where suspension hook 24 was in promotion state the elongation of crane arm 23, crane arm 23 is faced upward
Rise or the promotion of suspension hook 24 in any operation, then circuit pressure be set to unloading pressure.This each action stops as a result,
It can prevent the collision of crane arm 23 and suspension hook 24.
(second embodiment)
Then, the operating device of the crane of second embodiment of the present invention is illustrated.In present embodiment
In operating device, the skimmer circuit 50 and circuit 70 of hydraulic circuit 30 are different from first embodiment.Remaining is constituted and first
Embodiment is identical, therefore marks same symbol to the same part and omit the description.
(skimmer circuit)
As shown in figure 3, equipped with overflow main valve 51 on the skimmer circuit 50 of present embodiment.The setting of overflow main valve 51 exists
On the overflow oil circuit 61 for connecting working connection 36 and return oil circuit 37.Overflow main valve 51 back pressure guiding Bu Kou with return oil circuit 37 by
High pressure guiding oil circuit 62 links together.In the high pressure the sub- valve of high pressure kicks 52 is provided with on guiding oil circuit 62.In addition, overflowing
The back pressure guiding Bu Kou of stream main valve 51 is with return oil circuit 37 and then is also linked together by low pressure guiding oil circuit 63.The low pressure is used
Switching control valve when switching control valve 54 and suspension hook are stored when being provided with the sub- valve 53 of low pressure spill on guiding oil circuit 63, crossing promotion
44a.In turn, the back pressure guiding Bu Kou of overflow main valve 51 with return oil circuit 37 and then is also connected to one by unloading guiding oil circuit 69
It rises.In the unloading unloading switching control valve 59 is provided with on guiding oil circuit 69.
Switching control valve 44a is corresponding with suspension hook storage switching control valve 44 when suspension hook is stored, their spool is attached at one
It rises.Therefore, when switching the spool position of suspension hook storage switching control valve 44, the spool of switching control valve 44a when suspension hook is stored
Position is also linkedly switched with it.Switching control valve 44a is switched in suspension hook storage switching control valve 44 when suspension hook is stored
It is connected to low pressure guiding oil circuit 63 in the case of raised position, cutoff low guiding oil circuit 63 except this.
It is respectively arranged with elongation in flexible switching control valve 41, capstan winch switching control valve 42 and fluctuating switching control valve 43
Detection switch 41s, the detection switch 42s and detection switch 43s that steeves is promoted.Detection switch 41s is extended in flexible switching control
Valve 41 is to disconnect (OFF) in the case of switching in extended position, is closure (ON) except this.Promote detection switch
42s, to disconnect (OFF), is closure except this in the case where capstan winch switching control valve 42 switches in raised position
(ON).Detection switch of steeving 43s is disconnection (OFF) in the case where fluctuating switching control valve 43 switches in and steeves position, at this
Except in the case of for be closed (ON).
Furthermore be arranged the sub- valve of switching control valve 54, low pressure spill when crossing promotion on low pressure guiding oil circuit 63 53 with
And the configuration sequence of switching control valve 44a is not limited to present embodiment when suspension hook storage, can be set as any configuration sequence.
(circuit)
Switching control valve 54 and the unloading switching control valve 59 are dibit solenoid electric valves when the promotion excessively.It is logical
Circuit 70 shown in Fig. 4 is crossed come the solenoid 54s and unloading switching control valve of switching control valve 54 when controlling to crossing promotion
The energization of 59 solenoid 59s.Equipped with DC power supply 71 in circuit 70, it is arranged in parallel between DC power supply 71 and ground connection
There are 4 conducting wires 75~78.It is situated between in the middle section of conducting wire 76 and has 2 conducting wires 76a, 76b in parallel.Conducting wire 77 wherein divide by way
Pitch into conducting wire 77a and conducting wire 77b.
The switch 28s for promoting detector 28 was provided on conducting wire 76.Switch 28s is in the case where crossing promotion state
It is closure (ON) in the case of non-promotion state excessively for disconnection (OFF).In addition, being provided with elongation detection switch on conducting wire 77a
41s, the detection switch 42s and detection switch 43s that steeves is promoted.
Relay 79 is provided on conducting wire 76b, 75.Relay 79 makes conducting wire 75 lead in the case where conducting wire 76b is powered
It is logical, conducting wire 75 is cut off in the case where conducting wire 76b is powered off.Relay 80 is provided on conducting wire 76a, 77b.Relay 80 is in conducting wire
76a is connected conducting wire 77b in the case of being powered, conducting wire 77b is cut off in the case where conducting wire 76a is powered off.It is set on conducting wire 77,78
It is equipped with relay 81.Relay 81 is connected conducting wire 78 in the case where conducting wire 77 is powered, incision the case where conducting wire 77 powers off
Disconnected conducting wire 78.
The solenoid 54s of switching control valve 54 when being provided with promotion on conducting wire 75.Unloading is provided on conducting wire 78
With the solenoid 59s of switching control valve 59.
In the case where promotion detector 28 detected promotion state excessively, switch 28s disconnects (OFF), and conducting wire 76b is cut
Disconnected, conducting wire 75 is cut off by relay 79, is not supplied electric power to solenoid 54s.Thus, 54 quilt of switching control valve when crossing promotion
It is switched to the position for making low pressure guiding oil circuit 63 be connected to (with reference to Fig. 3).
On the other hand, the case where promotion detector 28 did not detected promotion state is being crossed (in the non-feelings for crossing promotion state
Condition) under, switch 28s is closed (ON), and conducting wire 76b is powered, and conducting wire 75 is powered by relay 79, to solenoid 54s supply electricity
Power.Thus, cross the position that switching control valve 54 when being promoted is switched to cutoff low guiding oil circuit 63 (with reference to Fig. 3).
In conclusion switching control valve 54 connects low pressure guiding oil circuit 63 in the case where crossing promotion state when crossing promotion
It is logical, the cutoff low guiding oil circuit 63 in the case of non-promotion state excessively.
In addition, in the case where promotion detector 28 detected promotion state excessively, switch 28s disconnects (OFF), conducting wire
76a is cut off, and conducting wire 77b is cut off by relay 80.If in this case, elongation detection switch 41s, promoted detection switch 42s with
And at least one party in the detection switch 43s that steeves disconnects (OFF), then conducting wire 77 is cut off, and conducting wire 78 is cut off by relay 81, no
Solenoid 59s is supplied electric power.Unloading guiding oil circuit 69 is set to be connected to thus, unload and be switched to switching control valve 59
Position (with reference to Fig. 3).
In the case that other than the above, solenoid 59s is supplied electric power.Thus, unload with 59 quilt of switching control valve
It is switched to the position of cut-out unloading guiding oil circuit 69 (with reference to Fig. 3).
In conclusion to cross promotion state, and switching control valve 41 of stretching, capstan winch switching control valve 42 and fluctuating
In the case that at least one party in switching control valve 43 switches in hook action side, unloading switching control valve 59 makes unloading
It is connected to guiding oil circuit 69, except this, the unloading cut-out of switching control valve 59 unloading guiding oil circuit 69.
(action of operating device)
Then, the action of the operating device of present embodiment is illustrated.
(1) it (crosses promotion detector 28 in non-the case where crossing promotion state in suspension hook 24 and the state that promoted was not detected
Situation) under, 54 cutoff low of switching control valve guiding oil circuit 63 when crossing promotion.In addition, unloading is cut off with switching control valve 59
Unloading guiding oil circuit 69.Thus, which the back pressure guiding Bu Kou of overflow main valve 51, which becomes, is only connected with the sub- valve of high pressure kicks 52
State.Therefore, the setting pressure of overflow main valve 51 is set to high pressure.That is, circuit pressure is set to high pressure.
In this case, no matter switching control valve 41~44 is switched to any position with any combinations, circuit pressure is all protected
It is constant to hold high pressure.Since the flow of the hydraulic oil of supply to hydraulic actuator 31~33 is more, hydraulic actuator can be made
31~33 high speed motions.Therefore, it is possible to easily carry out hoisting operation.In addition, when suspension hook stores operation, that is, i.e. convenient to operate
It is suspension hook storage switching control valve 44, before becoming promotion state, the action of hydraulic actuator 31~33 is also very fast, operation
Property is also preferable.Even if for example, executing lifting while executing the promotion of suspension hook 24 in operation suspension hook storage switching control valve 44
The contraction and lodging of arm 23, the action of hydraulic actuator 31~33 is also very fast, therefore workability is preferable.
(2) (the case where promotion detector 28 detected promotion state is crossed) the case where suspension hook 24 was in promotion state
Under, switching control valve 54 makes low pressure guiding oil circuit 63 be connected to when crossing promotion.In this case, if suspension hook stores switching control valve 44
It is switched to raised position, then switching control valve 44a is linkedly switched with it when suspension hook is stored so that low pressure guiding oil
Road 63 is connected to.Thus, which the back pressure guiding Bu Kou of overflow main valve 51 becomes the state being connect with the sub- valve of low pressure spill 53.Cause
This, the setting pressure of overflow main valve 51 is set to low pressure.That is, circuit pressure is set to low pressure.
If in this way, carrying out suspension hook stowing operation in the case where suspension hook 24 was in promotion state, circuit pressure is set
It is set to low pressure, therefore, when suspension hook 24 is abutted to crane arm 23, can prevents suspension hook 24 and crane arm 23 from damaging.
(3) (the case where promotion detector 28 detected promotion state is crossed) the case where suspension hook 24 was in promotion state
Under, when at least one party in flexible switching control valve 41, capstan winch switching control valve 42 and fluctuating switching control valve 43 is switched
When acting side to hook, unloading switching control valve 59 makes unloading guiding oil circuit 69 be connected to.Thus, overflow main valve
51 back pressure guiding Bu Kou is connect with oil circuit 37 is returned, and the hydraulic pressure of the back pressure chamber of overflow main valve 51 becomes zero.Therefore, overflow main valve
51 setting pressure is set to unloading pressure.That is, circuit pressure is set to unloading pressure.
Therefore, if carrying out in the case where suspension hook 24 was in promotion state the elongation of crane arm 23, crane arm 23 is faced upward
Rise or the promotion of suspension hook 24 in any operation, then circuit pressure be set to unloading pressure, therefore this each action stopping, can
Prevent the collision of crane arm 23 and suspension hook 24.
(third embodiment)
Then, the operating device of the crane of third embodiment of the present invention is illustrated.In present embodiment
In operating device, the skimmer circuit 50 and circuit 70 of hydraulic circuit 30 are different from second embodiment.Remaining is constituted and second
Embodiment is identical, therefore marks same symbol to the same part and omit the description.
(skimmer circuit)
As shown in figure 5, equipped with overflow main valve 51 on the skimmer circuit 50 of present embodiment.The setting of overflow main valve 51 is even
On the overflow oil circuit 61 for connecing working connection 36 and return oil circuit 37.The back pressure guiding Bu Kou of overflow main valve 51 is with return oil circuit 37 by height
Pressure guiding oil circuit 62 links together.In the high pressure the sub- valve of high pressure kicks 52 is provided with on guiding oil circuit 62.In addition, overflow
The back pressure guiding Bu Kou of main valve 51 is with return oil circuit 37 and then is also linked together by low pressure guiding oil circuit 63.It is used in the low pressure
It is provided with the sub- valve 53 of low pressure spill and low pressure switching control valve 55 on guiding oil circuit 63.Also, the back pressure of overflow main valve 51
Guiding Bu Kou is with return oil circuit 37 and then is also linked together by unloading guiding oil circuit 69.In the unloading on guiding oil circuit 69
It is provided with unloading switching control valve 59.
It stores and switches in flexible switching control valve 41, capstan winch switching control valve 42, fluctuating switching control valve 43 and suspension hook
It is respectively arranged with elongation detection switch 41s in control valve 44, promotes detection switch 42s, detection switch of steeving 43s and suspension hook receipts
Receive detection switch 44s.It is disconnection to extend detection switch 41s in the case where flexible switching control valve 41 switches in extended position
(OFF), it is closure (ON) except this.It promotes detection switch 42s and switches in promotion in capstan winch switching control valve 42
It is closure (ON) except this to disconnect (OFF) in the case of position.Detection switch of steeving 43s is in the switching that rises and falls
Control valve 43 switches in steeve position in the case of for disconnect (OFF), except this for be closed (ON).Suspension hook is stored
Detection switch 44s is disconnection (OFF) in the case where suspension hook storage switching control valve 44 switches in raised position, except this
In the case of for be closed (ON).
Furthermore the low pressure switching control valve 55 on low pressure guiding oil circuit 63 and the sub- valve of low pressure spill 53 are set
Configuration sequence is not particularly limited.
(circuit)
The low pressure switching control valve 55 and the unloading switching control valve 59 are dibit solenoid electric valves.Pass through
Circuit 70 shown in fig. 6 is controlled to the solenoid 55s of low pressure switching control valve 55 and unloading switching control valve 59
The energization of solenoid 59s.Equipped with DC power supply 71 in circuit 70,4 have been arranged in parallel between DC power supply 71 and ground connection
Root conducting wire 75~78.It is situated between in the middle section of conducting wire 75 and has 2 conducting wires 75a, 75b in parallel.In the middle section of conducting wire 76
It is situated between and has 2 conducting wires 76a, 76b in parallel.At it, bifurcated is conducting wire 77a and conducting wire 77b to conducting wire 77 on the way.
The switch 28s for promoting detector 28 was provided on conducting wire 76.Switch 28s is in the case where crossing promotion state
It is closure (ON) in the case of non-promotion state excessively for disconnection (OFF).It is opened in addition, being provided with elongation detection on conducting wire 77a
It closes 41s, promote the detection switch 42s and detection switch 43s that steeves.It is opened in addition, being provided with suspension hook storage detection on conducting wire 75b
Close 44s.
Relay 79 is provided on conducting wire 76b, 75a.Relay 79 makes conducting wire 75a in the case where conducting wire 76b is powered
Conducting wire 75a is cut off in conducting in the case where conducting wire 76b is powered off.Relay 80 is provided on conducting wire 76a, 77b.Relay 80
It is connected conducting wire 77b in the case where conducting wire 76a is powered, conducting wire 77b is cut off in the case where conducting wire 76a is powered off.Conducting wire 77,
Relay 81 is provided on 78.Relay 81 is connected conducting wire 78 in the case where conducting wire 77 is powered, in the feelings that conducting wire 77 powers off
Conducting wire 78 is cut off under condition.
The solenoid 55s of low pressure switching control valve 55 is provided on conducting wire 75.Unloading is provided on conducting wire 78 to use
The solenoid 59s of switching control valve 59.
In the case where promotion detector 28 detected promotion state excessively, switch 28s disconnects (OFF), and conducting wire 76b is cut
Disconnected, conducting wire 75a is cut off by relay 79.In this case, when suspension hook storage detection switch 44s is to disconnect (OFF), not to helical
Pipe 55s is supplied electric power.Thus, which low pressure switching control valve 55 is switched to the position for making low pressure guiding oil circuit 63 be connected to
(with reference to Fig. 5).If it is to be closed (ON) that suspension hook, which stores detection switch 44s, solenoid 55s is supplied electric power by conducting wire 75b.Such as
This one, low pressure switching control valve 55 is switched to the position (with reference to Fig. 5) of cutoff low guiding oil circuit 63.
On the other hand, (in non-promotion state excessively the case where promotion state was not detected in promotion detector 28 excessively
Situation) under, switch 28s is closed (ON), and conducting wire 76b is powered, and conducting wire 75a is powered by relay 79, is supplied to solenoid 55s
Electric power.Thus, which low pressure switching control valve 55 is switched to the position of cutoff low guiding oil circuit 63 (with reference to Fig. 5).
In conclusion in promotion state excessively, and suspension hook storage switching control valve 44 switches in the feelings of raised position
Under condition, low pressure switching control valve 55 makes low pressure guiding oil circuit 63 be connected to, except this, low pressure switching control
55 cutoff low of valve guiding oil circuit 63.
In addition, in the case where promotion detector 28 detected promotion state excessively, switch 28s disconnects (OFF), conducting wire
76a is cut off, and conducting wire 77b is cut off by relay 80.If in this case, elongation detection switch 41s, promoted detection switch 42s with
And at least one party in the detection switch 43s that steeves disconnects (OFF), then conducting wire 77 is cut off, and conducting wire 78 is cut off by relay 81, no
Solenoid 59s is supplied electric power.Unloading guiding oil circuit 69 is set to be connected to thus, unload and be switched to switching control valve 59
Position (with reference to Fig. 5).
In the case that other than the above, solenoid 59s is supplied electric power.Thus, unload with 59 quilt of switching control valve
It is switched to the position of cut-out unloading guiding oil circuit 69 (with reference to Fig. 5).
In conclusion in crossing promotion state, and flexible switching control valve 41, capstan winch switching control valve 42 and rise
In the case that at least one party in volt switching control valve 43 switches in hook action side, unloading switching control valve 59 makes to unload
It carries and is connected to guiding oil circuit 69, except this, the unloading cut-out of switching control valve 59 unloading guiding oil circuit 69.
(action of operating device)
Then, the action of the operating device of present embodiment is illustrated.
(1) it (crosses promotion detector 28 in non-the case where crossing promotion state in suspension hook 24 and the state that promoted was not detected
Situation) under, low pressure 55 cutoff low of switching control valve guiding oil circuit 63.In addition, unloading switching control valve 59 is unloaded
It carries with guiding oil circuit 69.Thus, which the back pressure guiding Bu Kou of overflow main valve 51 becomes and is only connect with the sub- valve of high pressure kicks 52
State.Therefore, the setting pressure of overflow main valve 51 is set to high pressure.That is, circuit pressure is set to high pressure.
In this case, no matter switching control valve 41~44 is switched to any position with any combinations, circuit pressure is all protected
It is constant to hold high pressure.Since the flow of the hydraulic oil of supply to hydraulic actuator 31~33 is more, hydraulic actuator can be made
31~33 high speed motions.Therefore, it is possible to easily carry out hoisting operation.In addition, when suspension hook stores operation, that is, i.e. convenient to operate
It is suspension hook storage switching control valve 44, before becoming promotion state, the action of hydraulic actuator 31~33 is also very fast, operation
Property is also preferable.Even if for example, executing lifting while executing the promotion of suspension hook 24 in operation suspension hook storage switching control valve 44
The contraction and lodging of arm 23, the action of hydraulic actuator 31~33 is also very fast, therefore workability is preferable.
(2) (the case where promotion detector 28 detected promotion state is crossed) the case where suspension hook 24 was in promotion state
Under, when suspension hook storage switching control valve 44 is switched to raised position, low pressure switching control valve 55 makes low pressure guiding oil
Road 63 is connected to.Thus, which the back pressure guiding Bu Kou of overflow main valve 51 becomes the state being connect with the sub- valve of low pressure spill 53.Cause
This, the setting pressure of overflow main valve 51 is set to low pressure.That is, circuit pressure is set to low pressure.
If in this way, carrying out suspension hook stowing operation in the case where suspension hook 24 was in promotion state, circuit pressure is set
It is set to low pressure, therefore, when suspension hook 24 is abutted to crane arm 23, can prevents suspension hook 24 and crane arm 23 from damaging.
(3) (the case where promotion detector 28 detected promotion state is crossed) the case where suspension hook 24 was in promotion state
Under, when at least one party in flexible switching control valve 41, capstan winch switching control valve 42 and fluctuating switching control valve 43 is switched
When acting side to hook, unloading switching control valve 59 makes unloading guiding oil circuit 69 be connected to.Thus, overflow main valve
51 back pressure guiding Bu Kou is connect with oil circuit 37 is returned, and the hydraulic pressure of the back pressure chamber of overflow main valve 51 becomes zero.Therefore, overflow main valve
51 setting pressure is set to unloading pressure.That is, circuit pressure is set to unloading pressure.
Therefore, if carrying out in the case where suspension hook 24 was in promotion state the elongation of crane arm 23, crane arm 23 is faced upward
It rises, any operation in the promotion of suspension hook 24, then circuit pressure is set to unloading pressure, and therefore, this each action stops, can
Prevent the collision of crane arm 23 and suspension hook 24.
(other embodiment)
The above embodiment is illustrated by taking loading type crane truck CR as an example, but the operation of the crane of the present invention
Device may also be arranged on other kinds of crane.
The above embodiment is configured to：If carrying out stretching for crane arm 23 in the case where suspension hook 24 was in promotion state
It is long, crane arm 23 steeve or the promotion of suspension hook 24 in any operation, then circuit pressure be set to unloading pressure.But according to
The difference of the composition of crane, there are following situations, that is, even if the operation for carrying out the elongation of crane arm 23 or steeving, suspension hook 24
It will not be elevated.It is constructed as follows in this case, can set：Even if being carried out in the case where suspension hook 24 was in promotion state
The elongation of crane arm 23 or the operation steeved, circuit pressure will not be set to unloading pressure.
Symbol description
10 general trucks
20 minor cranes
23 crane arms
24 suspension hooks
28 cross promotion detector
30 hydraulic circuits
The flexible hydraulic cylinder of 31 crane arms
32 capstan winch hydraulic motors
33 crane arm fluctuating hydraulic cylinders
41 flexible switching control valves
Switching control valve when 41a extends
42 capstan winch switching control valves
Switching control valve when 42a is promoted
43 fluctuating switching control valves
Switching control valve when 43a steeves
44 suspension hooks store switching control valve
Switching control valve when 44a suspension hooks are stored
50 skimmer circuits
51 overflow main valves
The sub- valve of 52 high pressure kicks
The sub- valve of 53 low pressure spills
Switching control valve when 54 mistake promotion
70 circuits.
Claims (5)
1. a kind of operating device of crane, the crane tool for crane arm and from the crane arm hang under suspension hook, the operation
Device is characterized in that having：
Promotion detector is crossed, that detects the suspension hook crosses promotion state；And
Hydraulic circuit makes the crane act；
The hydraulic circuit has：
Capstan winch hydraulic actuator executes the promotion or decline of the suspension hook；
Suspension hook stores switching control valve, switches the direction of the hydraulic oil supplied with hydraulic actuator to the capstan winch；
Capstan winch switching control valve switches the direction of the hydraulic oil supplied with hydraulic actuator to the capstan winch；And
Skimmer circuit sets circuit pressure；Also,
Promotion state was not detected in the promotion detector excessively and suspension hook storage switching control valve switches in promotion
In the case of position, circuit pressure is set as high pressure by the skimmer circuit,
Detected that promotion state and the suspension hook stored switching control valve and switch in promotion position in the promotion detector of crossing
In the case of setting, circuit pressure is set as low pressure by the skimmer circuit,
Promotion state was detected in the detector of promotion excessively and the capstan winch switching control valve switches in raised position
In the case of, circuit pressure is set as unloading pressure by the skimmer circuit.
2. the operating device of crane according to claim 1, which is characterized in that
The skimmer circuit has：
Overflow main valve, setting is between working connection and return oil circuit；
High pressure guiding oil circuit connects the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；
Low pressure guiding oil circuit connects the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；
The sub- valve of high pressure kicks, setting is in the high pressure on guiding oil circuit；
The sub- valve of low pressure spill, setting is in the low pressure on guiding oil circuit；And
Low pressure switching control valve, setting, on guiding oil circuit, were detected in the low pressure in the promotion detector of crossing
In the case that promotion state and suspension hook storage switching control valve switch in raised position, low pressure guiding oil circuit is made to connect
It is logical.
3. the operating device of crane according to claim 1, which is characterized in that
The skimmer circuit has：
Overflow main valve, setting is between working connection and return oil circuit；
High pressure guiding oil circuit connects the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；
Low pressure guiding oil circuit connects the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；
The sub- valve of high pressure kicks, setting is in the high pressure on guiding oil circuit；
The sub- valve of low pressure spill, setting is in the low pressure on guiding oil circuit；
Switching control valve when crossing promotion, setting, on guiding oil circuit, are detected in the low pressure in the promotion detector of crossing
In the case of crossing promotion state, the low pressure is made to guide oil communication；And
Switching control valve when suspension hook is stored, setting, on guiding oil circuit, switching control are stored in the suspension hook in the low pressure
Vavle switching makes the low pressure guide oil communication in the case of raised position.
4. the operating device of crane according to claim 2 or 3, which is characterized in that
The skimmer circuit has：
Unloading guiding oil circuit connects the back pressure guiding Bu Kou of the overflow main valve and the return oil circuit；And
Unloading switching control valve, setting, on guiding oil circuit, were detected in the unloading in the promotion detector of crossing
In the case that promotion state and the capstan winch switching control valve switch in raised position, the unloading is made to guide oil communication.
5. the operating device of crane according to claim 3, which is characterized in that
The skimmer circuit has：
Capstan winch guides oil circuit, connects the low pressure guiding oil circuit and the return oil circuit；And
Switching control valve when promotion, setting are switched in the capstan winch switching control valve and are carried on capstan winch guiding oil circuit
In the case that raise-position is set, the capstan winch is made to guide oil communication.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014249112A JP6520092B2 (en) | 2014-12-09 | 2014-12-09 | Crane operating device |
| JP2014-249112 | 2014-12-09 | ||
| PCT/JP2015/004168 WO2016092719A1 (en) | 2014-12-09 | 2015-08-20 | Crane operating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107001013A CN107001013A (en) | 2017-08-01 |
| CN107001013B true CN107001013B (en) | 2018-08-24 |
Family
ID=56106960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580065264.8A Active CN107001013B (en) | 2014-12-09 | 2015-08-20 | The operating device of crane |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6520092B2 (en) |
| KR (1) | KR101960207B1 (en) |
| CN (1) | CN107001013B (en) |
| WO (1) | WO2016092719A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6717014B2 (en) * | 2016-04-08 | 2020-07-01 | 株式会社タダノ | crane |
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| JP5535558B2 (en) * | 2009-09-01 | 2014-07-02 | 株式会社タダノ | Hook storage system and crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3519282B2 (en) * | 1998-09-09 | 2004-04-12 | 株式会社タダノ | Winch hydraulic circuit |
-
2014
- 2014-12-09 JP JP2014249112A patent/JP6520092B2/en active Active
-
2015
- 2015-08-20 WO PCT/JP2015/004168 patent/WO2016092719A1/en active Application Filing
- 2015-08-20 KR KR1020177015089A patent/KR101960207B1/en active IP Right Grant
- 2015-08-20 CN CN201580065264.8A patent/CN107001013B/en active Active
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| JPH0451493U (en) * | 1990-09-04 | 1992-04-30 | ||
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| JPH0577193U (en) * | 1992-03-30 | 1993-10-19 | 新明和工業株式会社 | Hook storage safety device for hook retractable crane |
| JPH0654687U (en) * | 1992-12-25 | 1994-07-26 | 株式会社加藤製作所 | Hook storage device for vehicle-mounted crane |
| JP4354048B2 (en) * | 1999-07-21 | 2009-10-28 | 古河機械金属株式会社 | Crane hook operating device |
| JP5535558B2 (en) * | 2009-09-01 | 2014-07-02 | 株式会社タダノ | Hook storage system and crane |
| CN202201661U (en) * | 2011-08-09 | 2012-04-25 | 长沙桑尼重工机械有限公司 | Automatic hook-retracting device for hoisting hook of intelligent lorry-mounted crane |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170081674A (en) | 2017-07-12 |
| JP6520092B2 (en) | 2019-05-29 |
| KR101960207B1 (en) | 2019-03-19 |
| WO2016092719A1 (en) | 2016-06-16 |
| JP2016108133A (en) | 2016-06-20 |
| CN107001013A (en) | 2017-08-01 |
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