CN102877404A - Method and device for controlling milling drum to stop when milling machine backs up and milling machine - Google Patents
Method and device for controlling milling drum to stop when milling machine backs up and milling machine Download PDFInfo
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- CN102877404A CN102877404A CN2012103822032A CN201210382203A CN102877404A CN 102877404 A CN102877404 A CN 102877404A CN 2012103822032 A CN2012103822032 A CN 2012103822032A CN 201210382203 A CN201210382203 A CN 201210382203A CN 102877404 A CN102877404 A CN 102877404A
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- 238000003801 milling Methods 0.000 title claims abstract description 276
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- 239000003921 oil Substances 0.000 claims description 115
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- 239000002828 fuel tank Substances 0.000 claims description 17
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Abstract
A method for controlling the stop of a milling drum when a milling machine backs a car comprises the steps of sensing the oil pressure on a working oil way connected with a working oil port for backing and oil feeding of a walking hydraulic motor (5) of the milling machine; and when the oil pressure is equal to or larger than a preset oil pressure value, controlling a reversing valve corresponding to at least one of a hydraulic clutch (2) of the milling machine and a milling drum transmission belt tensioning oil cylinder (1) to reverse, so that at least one of the hydraulic clutch and the milling drum transmission belt tensioning oil cylinder releases pressure. In addition, the invention also provides a device for realizing the method and a milling machine comprising the device. The method and the device do not need to obtain a reversing signal in a mechanical input mode, the reliability and the safety are greatly improved in an oil pressure sensing mode, the operation is more reliable, the performance is more stable, the device for controlling the milling drum to stop is not easy to damage, and the service life is longer.
Description
Technical field
The present invention relates to a kind of milling machine control method, particularly, the method for control milling and planing drum stall when relating to a kind of milling machine reversing.Further, the invention still further relates to a kind of device for control milling and planing drum stall when milling machine is moveed backward.In addition, the invention still further relates to a kind of milling machine, this milling machine comprises above-mentioned device for control milling and planing drum stall when milling machine is moveed backward.
Background technology
Milling machine belongs to the engineering construction machinery that extensively adopts in the highway engineering construction, wherein the milling and planing drum of milling machine belongs to one of vitals of milling machine, cutter is installed on the milling and planing drum, by milling and planing drum rotatablely move and milling machine to overtake, thereby milling machine can the milling road surface so that follow-up construction is convenient in evenness of road surface.
Require milling machine that the milling and planing drum safety control should be set in the security technology standard of milling machine, this installation control device is used for automatically stopping running and the No starting milling and planing drum of milling and planing drum when milling machine is moveed backward.
State, the extensive running gear that adopts of inside and outside milling machine are the hydraulic drive type running gear at present, this fluid pressure type running gear is by operating personnel's operational drive control crank, and the control crank that travels is realized the variation of travel speed size and travel direction by flexible axle control walking hydraulic pump (typically being manual servo variable pump).Machine driving (belt transmission) is adopted in the running of milling and planing drum, engages to realize that by solenoid operated directional valve control belt tension and hydraulic clutch milling and planing drum stops and turning round.Although be known for those skilled in the art, in order to help it will be appreciated by those skilled in the art that installation control device and the control method thereof of describing prior art referring to Fig. 1 to Fig. 4.
Particularly, Fig. 1 to Fig. 4 shows primary structure and the control principle of the above-mentioned safety control of prior art.To shown in Figure 4, this safety control relates generally to the control crank 1 that travels, cam 2, contact switch 3, solenoid operated directional valve 4, motor 5, hydraulic clutch 6, walking hydraulic pump 7, flexible axle 8, turgor cylinder 9, driving belt 10, milling and planing drum 11, milling and planing drum startup gauge tap S1, relay K etc. referring to Fig. 1.Wherein, as shown in figures 1 and 3, motor 5 is generally via driving walking hydraulic pump 7 rotations such as transfer gear (not shown), an end of another output shaft of described transfer gear is provided with hydraulic clutch 6 simultaneously, this hydraulic clutch 6 is connected in drive pulley, this drive pulley is connected on the driven pulley on the milling and planing drum 11 by driving belt 10, when the clutch disc of control hydraulic clutch 6 engages, the power of motor 5 is via hydraulic clutch 6, drive pulley, driving belt 10 is delivered on the driven pulley, thereby can the rotation of driving milling drum.In addition, referring to shown in Figure 3, for so that driving belt 10 transferring power effectively, driving belt 10 also correspondence is provided with hydraulic tensioning mechanism, and this hydraulic tensioning mechanism comprises tensioning hydro-cylinder 9, and an end of the piston rod of this tensioning hydro-cylinder is articulated in the tensioner arm that can rotate, when the piston rod of tensioning hydro-cylinder 9 stretches out, tensioning hydro-cylinder 9 drives the tensioner arms rotation, thereby so that the regulating wheel tensioning driving belt 10 of tensioner arm one end, so that driving belt 10 transferring power effectively.Generally speaking, the driving hydraulic oil of tensioning hydro-cylinder 9 and hydraulic clutch 6 can by independent auxiliary hydraulic pump supply, can certainly be supplied by walking hydraulic pump 7.
Therefore, when milling machine is moveed backward, if so that milling and planing drum 11 shuts down automatically, need the clutch disc of control hydraulic clutch 6 to separate to disconnect power supply, simultaneously can be so that tensioning hydro-cylinder 9 be removed tensioning states, can't transferring power so that driving belt 10 is lax.
In the prior art, such as Fig. 2 and shown in Figure 4, when the control crank 1 that travels is handled as advanced potential, travel control crank 1 band moving cam 2 so that contact switch 3 (this contact switch is the switch S 2 among Fig. 4) is in progressive position, it is the position that switch S 2 contacts among Fig. 4 are in disconnection, this moment is because relay is normal closing type relay, therefore can control as required milling and planing drum and start gauge tap S1, get electric so that be used for the solenoid operated directional valve 4 of the oil circuit commutation of control hydraulic clutch 6 and tensioning hydro-cylinder 9, as shown in Figure 2, when solenoid operated directional valve 4(two-position four-way solenoid operated directional valve) when electric, solenoid operated directional valve 4 commutations, so that among Fig. 2 solenoid operated directional valve be in upper state, the hydraulic oil of oil inlet P is fed to hydraulic clutch 6 and tensioning hydro-cylinder 9 via solenoid operated directional valve 4, thereby hydraulic clutch 6 engages, tensioning hydro-cylinder 9 tensionings, milling and planing drum 11 is driven in rotation.When after the control crank 1 that travels is operating as, giving up the throne, referring to shown in Figure 4, travel control crank 1 band moving cam 2 so that contact switch 3 is in going-back position, be that switch S 2 among Fig. 4 switches to the position that retreats the closing of contact, this moment, the coil of normal closing type relay K got electric, thereby the contact of this normal closing type relay K is converted to off-state from normally off, this moment solenoid operated directional valve 4 dead electricity, referring to shown in Figure 2, solenoid operated directional valve 4 returns to the next state shown in Figure 2 under the effect of back-moving spring, the rodless cavity of the actuator chamber of hydraulic clutch 6 and tensioning hydro-cylinder 9 is communicated with fuel tank via solenoid operated directional valve 4 respectively, apparently, this moment, the clutch disc of hydraulic clutch 6 was separated, and tensioning hydro-cylinder 9 is removed tensioning, thereby milling and planing drum 11 can't obtain power, correspondingly can shut down.It is also to be noted that at this, when contact switch 3 is in going-back position, because the coil of normal closing type relay K gets electric, and the contact of this normal closing type relay K is connected on the startup control circuit of milling and planing drum 11, because this moment, the contact of normal closing type relay K was in off-state, therefore no matter how operating personnel operate milling and planing drum starts gauge tap S1, all can't be so that solenoid operated directional valve 4 gets electric, thereby milling and planing drum 11 also just can't start when reversing, this has prevented in the milling machine reversing process, owing to maloperation and so that the situation generation of milling and planing drum running.
Can be found out by upper description, the above-mentioned safety control of prior art mainly forms astern signal by travel control crank 1 and contact switch 3, relay K responds this signal and so that solenoid operated directional valve dead electricity commutation, thereby so that hydraulic clutch 6 separates and tensioning hydro-cylinder 9 is removed tensioning, its essence is a kind of astern signal that forms mechanically, and responds this astern signal and so that the control mode of solenoid operated directional valve 4 commutation by relay.
But when the milling machine of above-mentioned prior art was moveed backward, method and safety control that the control milling and planing drum shuts down automatically remained in following defective:
Because during this existing milling machine reversing, astern signal is to input via contact switch by the mode of mechanical handling, makes solenoid operated directional valve 4 commutations by control circuit again, with control belt tension and lax, the hydraulic clutch Engage and disengage, thus realize shutting down of milling and planing drum.Yet, have the defectives such as reliability is low, the life-span is short based on the method and apparatus of contact switch mechanical handling, and reduced reliability and the safety of milling machine.
In view of this, need the design a kind of novel method and the device that are used for control milling and planing drum stall when milling machine is moveed backward, to overcome or to alleviate the defects of prior art.
Summary of the invention
The method of control milling and planing drum stall when technical problem to be solved by this invention provides the reversing of a kind of milling machine, the method can be effectively when milling machine move backward so that milling and planing drum shuts down, and operation is reliable, stablizes.
Further, technical problem to be solved by this invention provides a kind of device for control milling and planing drum stall when milling machine is moveed backward, this device can be effectively when milling machine is moveed backward so that milling and planing drum shuts down and reliable operation, stable performance.
In addition, technical problem to be solved by this invention provides a kind of milling machine, this milling machine can be in when reversing so that milling and planing drum shuts down, and the control that shuts down is reliable and stable.
In order to solve the problems of the technologies described above, the invention provides a kind of method of control milling and planing drum stall when milling machine is moveed backward, wherein, the method comprises: the first, and the oil pressure on the working oil path that the reversing oil-feed of the hydraulic motor travel motor of the described milling machine of sensing connects with actuator port; Second, when described oil pressure is equal to or greater than default oil pressure value, control the hydraulic clutch of described milling machine and at least one the corresponding reversal valve commutation in the milling and planing drum driving-belt tensioning hydro-cylinder, so that at least one release in described hydraulic clutch and the milling and planing drum driving-belt tensioning hydro-cylinder.
Preferably, in described second step, control the commutation of the corresponding reversal valve of described hydraulic clutch and milling and planing drum driving-belt tensioning hydro-cylinder, with simultaneously so that described hydraulic clutch and the release of milling and planing drum driving-belt tensioning hydro-cylinder.
More preferably, be provided with pressure switch on the working oil path that the reversing oil-feed of described hydraulic motor travel motor connects with actuator port, in described first step, by the described oil pressure of described pressure switch sensing; In described second step, when described oil pressure is equal to or greater than default oil pressure value, thereby the closing of contact of described pressure switch is so that the residing power on circuitry of this pressure switch, be in the signal of telecommunication of reversing state to form described milling machine, and respond this signal of telecommunication and control corresponding described reversal valve commutation.
Preferably, described hydraulic clutch and milling and planing drum driving-belt tensioning hydro-cylinder share same described reversal valve, this reversal valve has two operating positions at least, at this reversal valve of the first operating position so that hydraulic oil is fed to the driving oil pocket of described hydraulic clutch and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder, at this reversal valve of the second operating position so that the rodless cavity of the driving oil pocket of described hydraulic clutch and milling and planing drum driving-belt tensioning hydro-cylinder be communicated with release with fuel tank respectively.
Further, described reversal valve is solenoid operated directional valve, and this solenoid operated directional valve gets and is in described the first operating position when electric, is in described the second operating position during dead electricity.
Further preferably, also be in series with the coil of normal closing type relay on the residing circuit of described pressure switch, and the contact of this normal closing type relay is connected on the control circuit of described solenoid operated directional valve, in described second step, when the closing of contact of described pressure switch and so that during the residing power on circuitry of this pressure switch, the coil of described normal closing type relay gets electric, so that the contact of this normal closing type relay disconnects, thereby the control circuit of described solenoid operated directional valve disconnects so that described solenoid operated directional valve dead electricity.
On the basis of the technical scheme of said method of the present invention, the present invention also provides a kind of device for control milling and planing drum stall when milling machine is moveed backward, wherein, described device comprises oil pressure sensing element and control element, this oil pressure sensing element is arranged on the working oil path that the reversing oil-feed of the hydraulic motor travel motor of described milling machine connects with actuator port with the sensing oil pressure, when described control element is equal to or greater than default oil pressure value at the oil pressure of described oil pressure sensing element sensing, respond the astern signal of this oil pressure sensing element formation and control the hydraulic clutch of described milling machine and at least one the corresponding reversal valve commutation in the milling and planing drum driving-belt tensioning hydro-cylinder, so that at least one release in described hydraulic clutch and the milling and planing drum driving-belt tensioning hydro-cylinder.
Preferably, described reversal valve is the solenoid operated directional valve that described hydraulic clutch and milling and planing drum driving-belt tensioning hydro-cylinder share, this solenoid operated directional valve gets when electric so that hydraulic oil is fed to hydraulic clutch and the milling and planing drum driving-belt tensioning hydro-cylinder of described milling machine, during dead electricity so that this hydraulic clutch and the release of milling and planing drum driving-belt tensioning hydro-cylinder.
Specifically selectively, described solenoid operated directional valve is the two-position four-way solenoid operated directional valve, being used for of the oil-in of this two-position four-way solenoid operated directional valve and described milling machine is communicated with to the output oil port of the auxiliary hydraulic pump of described hydraulic clutch and milling and planing drum driving-belt tensioning hydro-cylinder fuel feeding, oil return opening is communicated with fuel tank, the first actuator port is communicated with the driving oil pocket of described hydraulic clutch and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder respectively, and the sealing of the second actuator port; This two-position four-way solenoid operated directional valve when electric so that described oil-in be communicated with described the first actuator port, during dead electricity so that described oil return opening be communicated with described the first actuator port.
Preferably, described oil pressure sensing element is pressure switch, described control element is normal closing type relay, and the coil of this normal closing type relay is connected on the residing circuit of described pressure switch, and the contact of this normal closing type relay is connected on the control circuit of described solenoid operated directional valve.
Particularly, also be in series with milling and planing drum on the control circuit of described solenoid operated directional valve and start gauge tap.
Particularly, the walking hydraulic pump of described hydraulic motor travel motor and described milling machine forms the walking closed type hydraulic system, the first actuator port of wherein said walking hydraulic pump is communicated with actuator port with the oil-feed of advancing of described hydraulic motor travel motor via flow divider, the second actuator port is communicated with actuator port with the reversing oil-feed of described hydraulic motor travel motor, and the inlet port of the hydraulic pump of should walking is communicated with fuel tank; The second actuator port that described pressure switch is arranged on described walking hydraulic pump and the reversing oil-feed of described hydraulic motor travel motor are with being communicated with on the oil circuit between the actuator port.
Specifically selectively, described walking hydraulic pump is manual servo variable pump.
Particularly, the inlet port of described walking hydraulic pump is communicated with described fuel tank via strainer.
In addition, the present invention also provides a kind of milling machine, and wherein, this milling machine comprises the described device for control milling and planing drum stall when milling machine is moveed backward of above-mentioned arbitrary technical scheme.
Pass through technique scheme, the method of the time control milling and planing drum stall of moveing backward for planer of the present invention and device thereof obtain the astern signal of milling machine with the oil pressure of actuator port by the reversing oil-feed of sensing hydraulic motor travel motor, and according to this astern signal control hydraulic clutch and/or the tensioning hydro-cylinder release of milling and planing drum driving-belt so that the milling and planing drum stall, especially under preferred embodiment, with working oil path that actuator port connects a pressure switch is installed by the reversing oil-feed at hydraulic motor travel motor, feed back astern signal by pressure switch, and disconnect the control circuit of solenoid operated directional valve by normal closing type relay, thereby the solenoid operated directional valve dead electricity, hydraulic clutch and the tensioning hydro-cylinder release of milling and planing drum driving-belt are so that the milling and planing drum stall.To be compared by the mechanical input mode of contact switch connecting and disconnecting with the astern signal of prior art, method and apparatus of the present invention need not to obtain astern signal by the mode of machinery input, it is by the mode of oil pressure sensing, reliability and safety improve greatly, its operation is more reliable, performance is more stable, and the device of control milling and planing drum of the present invention stall is not fragile, longer service life.Milling machine of the present invention comprises said apparatus, so it has above-mentioned advantage equally.
Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Following accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of manual, and itself and the following specific embodiment one are used from explanation the present invention, but protection scope of the present invention is not limited to following the drawings and the specific embodiments.In the accompanying drawings:
Fig. 1 is the simplified structure schematic diagram that is used for the device of control milling and planing drum stall when milling machine is moveed backward of prior art.
Fig. 2 shows travel in the device of the prior art shown in Figure 1 driving relationship of control crank and contact switch and the hydraulic schematic diagram of electromagnetic switch valve portion.
Fig. 3 shows that hydraulic clutch connects in the device of prior art shown in Figure 1 driving pulley is by the driving relationship of driving belt driving milling drum rotation.
Fig. 4 is the circuit theory diagrams of the device of prior art shown in Figure 1.
Fig. 5 is the hydraulic schematic diagram that is used for the relevant Hydraulic Elements of the device of control milling and planing drum stall when milling machine is moveed backward of the specific embodiment of the invention.
Fig. 6 shows that the driving pulley that hydraulic clutch connects in the specific embodiment of the invention rouses the driving relationship of rotating by the driving belt driving milling.
Fig. 7 is the control circuit schematic diagram that is used for the device of control milling and planing drum stall when milling machine is moveed backward of the specific embodiment of the invention.
Fig. 8 is the step block diagram of the method for milling and planing drum stall of controlling when milling machine is moveed backward of the specific embodiment of the invention.
Description of reference numerals of the present invention:
1 milling and planing drum driving-belt tensioning hydro-cylinder; 2 hydraulic clutches;
3 control cranks that travel; 4 flow dividers;
5 hydraulic motor travel motors; 6 two-position four-way solenoid operated directional valves;
7 auxiliary hydraulic pumps; 8 fuel tanks;
9 oil filters; 10 walking hydraulic pumps;
11 pressure switches; 12 tension pulleys;
13 driving belts; 14 milling and planing drums.
The S1 milling and planing drum starts gauge tap; The K1 normal closing type relay.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, should be understood that, the specific embodiment described herein only is used for description and interpretation the present invention, and protection scope of the present invention is not limited to the following specific embodiment.
At first need to prove, method and device thereof for control milling and planing drum stall when milling machine is moveed backward of the present invention controlled based on hydraulic system and the mechanical driving structure of existing milling machine, in order to help those skilled in the art to understand the following method that is used for control milling and planing drum stall when milling machine is moveed backward of the present invention and the specific embodiment of device thereof, below at first with reference to hydraulic structure and the mechanical driving structure relevant with control design of the present invention of Fig. 5 to Fig. 7 schematic illustration milling machine, will describe on this basis the method for control milling and planing drum stall when milling machine is moveed backward of the present invention and the specific embodiment of device thereof in detail.
Generally speaking, the hydraulic travel system of milling machine drives vehicle wheel rotation by walk motor with hydraulic pressure 5, walk motor with hydraulic pressure 5 typically consists of the enclosed vibration hydraulic system with walking hydraulic pump 10, particularly, the first actuator port B of walking hydraulic pump 10 via the oil-feed of advancing of flow divider 4 and hydraulic motor travel motor 5 with the actuator port C(milling machine of the hydraulic motor 5 oil-feed actuator port C that advances that namely walks) be communicated with, the reversing oil-feed of the second actuator port A and hydraulic motor travel motor 5 is with namely the walk milling machine reversing oil-feed actuator port D of hydraulic motor 5 of actuator port D() is communicated with, and this inlet port of walking hydraulic pump 10 is communicated with fuel tank 8.It should be noted that at this, hydraulic motor travel motor 5 is two or four (being Two-wheeled or four-wheel drive), for example with regard to two-wheel drive, two hydraulic motor travel motor 5 oil-feeds of advancing separately communicate in the course of the work with actuator port C, and reversing oil-feed separately also communicates in the course of the work with actuator port D, namely walks to connect for parallel way between the hydraulic motor 5.Therefore in the description of the following specific embodiment of the present invention, the oil-feed of advancing can refer to two hydraulic fluid ports of any hydraulic motor travel motor with actuator port D with actuator port C and reversing oil-feed, known ground, hydraulic motor travel motor 5 has two actuator ports, when milling machine advances, an actuator port of hydraulic motor travel motor 5 (being called " oil-feed of advancing actuator port C ") oil-feed, and its another actuator port (being called " reversing oil-feed actuator port D ") oil return, this moment, the oil-feed of advancing of hydraulic motor travel motor 5 belonged to the high-pressure side with the working oil path of actuator port C one side, and hydraulic motor travel motor is forward for example; When milling machine was moveed backward, hydraulic motor travel motor 5 needed counter-rotating, the oil-feed actuator port D oil-feed of moveing backward this moment, and the oil-feed of advancing actuator port C oil return, and the reversing oil-feed belongs to the high-pressure side with the working oil path that actuator port D one side connects.The hydraulic structure of the hydraulic motor travel motor 5 of milling machine is known, does not repeat them here.In addition, the oil inlet and oil return direction of the rotating switching controls of hydraulic motor travel motor 5 mainly realizes by the walking hydraulic pump 10 of control milling machine, walking hydraulic pump 10 belongs to the known Hydraulic Elements of milling machine, it typically is manual servo variable pump, rotating speed and rotating that discharge capacity by regulating walking hydraulic pump 10 and pump oil direction can be regulated hydraulic motor travel motor 5, walking hydraulic pump 10 generally comprises the first actuator port B, the second actuator port A and inlet port, by control travel control crank 3 regulate the walking hydraulic pump 10 servo variable mechanism, can be so that walking hydraulic pump 10 be oily from the first actuator port B or the outside pump of the second actuator port A, the oil return of hydraulic motor travel motor 5 then is delivered directly to walking hydraulic pump 10 and circulates, because walking hydraulic pump 10 needs to change discharge capacity, the inlet port of walking hydraulic pump 10 is communicated with fuel tank via strainer 9, with as required in the closed circuit repairing or so that unnecessary hydraulic oil overflow in the fuel tank 8.Walking hydraulic pump 10 is generally driven via transfer gear, deceleration device by the engine in situ of milling machine.Certainly, the hydraulic travel system of milling machine is not limited to above-mentioned canonical form shown in Figure 5, and the hydraulic pump 10 of for example walking also can adopt conventional variable pump, and realizes that by the walking solenoid operated directional valve oil circuit of hydraulic motor travel motor 5 rotatings switches.In a word, the hydraulic travel system of milling machine modification how no matter, it all can use the present invention following method and the device thereof that are used for controlling the milling and planing drum stall when milling machine move backward, correspondingly also just belongs to protection scope of the present invention.
In addition, as indicated above, the milling and planing drum 14 of milling machine is generally driven by driving belt 13 by the driving pulley that connects on the hydraulic clutch 2, wherein hydraulic clutch 2 is arranged on an end of another root output shaft of above-mentioned transfer gear, with the joint of the clutch disc by hydraulic clutch 2 or separate the power that transmits engine in situ or interrupt transmission of power.Driving belt 13 correspondences are provided with hydraulic tensioning mechanism, this hydraulic tensioning mechanism comprises milling and planing drum driving-belt tensioning hydro-cylinder 1, one end of the piston rod of this milling and planing drum driving-belt tensioning hydro-cylinder is articulated in the tensioner arm that can rotate (be tensioner arm can pivot installation), when the piston rod of milling and planing drum driving-belt tensioning hydro-cylinder 1 stretches out, the rotation of driving tensioner arm, thereby so that the tension pulley 12 tensioning driving belts 13 of tensioner arm one end, so that driving belt 13 transferring power effectively.Typically, referring to shown in Figure 5, the driving hydraulic oil of milling and planing drum driving-belt tensioning hydro-cylinder 1 and hydraulic clutch 2 can generally also can be driven via transfer gear by engine in situ by independent auxiliary hydraulic pump 7(, can certainly adopt independently drive unit) supply, can certainly be by walking hydraulic pump 7 by the supply oil circuit supply of corresponding branch.In milling machine, milling and planing drum driving-belt tensioning hydro-cylinder 1 and the hydraulic clutch 2 general reversal valves that share, for example in Fig. 5, adopt a two-position four-way solenoid operated directional valve 6 in the conversion valve block, the oil-in of this two-position four-way solenoid operated directional valve 6 is communicated with the output oil port of auxiliary hydraulic pump 7, oil return opening is communicated with fuel tank 8, the first actuator port is communicated with the driving oil pocket of hydraulic clutch 2 and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder 1 respectively by the form of branch's oil circuit, and the second actuator port sealing (the two-position four-way solenoid operated directional valve 6 in this conversion valve block in fact only is equivalent to a two position, three-way electromagnetic change valve), this two-position four-way solenoid operated directional valve 6 when electric so that described oil-in be communicated with described the first actuator port, thereby hydraulic oil is input to the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder 1 and the driving oil pocket of hydraulic clutch 2 via two-position four-way solenoid operated directional valve 6, so that the piston rod of milling and planing drum driving-belt tensioning hydro-cylinder 1 stretches out with belt tension, and the clutch disc of hydraulic clutch 2 engages transmission power, during dead electricity so that described oil return opening be communicated with described the first actuator port, thereby so that milling and planing drum driving-belt tensioning hydro-cylinder 1 and hydraulic clutch 2 draining releases, hydraulic clutch 2 disconnects transmission of power, the driving belt 13 lax effects that can not play transmission, correspondingly milling and planing drum 14 also will stop the rotation naturally, can find out from here, in fact, as long as any one release in hydraulic clutch 2 and the milling and planing drum driving-belt tensioning hydro-cylinder 1, all can so that milling and planing drum 14 shut down, certainly in order to strengthen the reliability of control, preferably can be simultaneously so that hydraulic clutch 2 and the 1 simultaneously release of milling and planing drum driving-belt tensioning hydro-cylinder.It should be noted that at this, although general hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1 share solenoid operated directional valve (for example above-mentioned two-position four-way solenoid operated directional valve) on the existing milling machine, and be provided with milling and planing drum on the control circuit of this solenoid operated directional valve and start gauge tap S1, but for those skilled in the art apparently, hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1 are not limited to share the situation of solenoid operated directional valve, but can have separately independently solenoid operated directional valve, milling and planing drum startup gauge tap S1 can be linked switch in this case.In addition, the reversal valve of hydraulic clutch 2 and 1 employing of milling and planing drum driving-belt tensioning hydro-cylinder also is not limited to the form of solenoid operated directional valve.The above-mentioned hydraulic structure of milling machine modification how no matter, as long as it uses technical conceive of the present invention, it all belongs to protection scope of the present invention.
Above some typical structures and the simple variant structure relevant with technical conceive of the present invention of having described milling machine with reference to Fig. 5 to Fig. 7.Below based on the above-mentioned hydraulic structure of milling machine and mechanical driving structure the specific embodiment for the method for control milling and planing drum stall when milling machine is moveed backward of the present invention is described.
Briefly, referring to shown in Figure 8, the method for control milling and planing drum stall when milling machine is moveed backward of the present invention comprises: the oil pressure on the working oil path that the reversing oil-feed of the hydraulic motor travel motor 5 of sensing milling machine connects with actuator port D.For those skilled in the art significantly, because the reversing oil-feed of hydraulic motor travel motor 5 is used for oil return with actuator port D when milling machine advances, therefore oil pressure is relatively low, and when milling machine is moveed backward, be used for oil-feed, this moment, oil pressure was higher, therefore the oil pressure on the working oil path that connects with actuator port D of the reversing oil-feed of the hydraulic motor travel motor 5 by the sensing milling machine can obtain the astern signal of milling machine reliably.Thereby, when the oil pressure of sensing is equal to or greater than default oil pressure value, can control the hydraulic clutch 2 of described milling machine and at least one the corresponding reversal valve commutation in the milling and planing drum driving-belt tensioning hydro-cylinder 1, so that at least one release in hydraulic clutch 2 and the milling and planing drum driving-belt tensioning hydro-cylinder 1, thereby reach the purpose of the power supply of interrupting milling and planing drum 14, so that milling and planing drum 14 natural stalls.In order to strengthen the reliability of control milling and planing drum 14 stalls, preferably, can control hydraulic clutch 2 and the 1 corresponding reversal valve commutation of milling and planing drum driving-belt tensioning hydro-cylinder, with simultaneously so that hydraulic clutch 2 and 1 release of milling and planing drum driving-belt tensioning hydro-cylinder.
In the above-mentioned technical conceive scope of method of the present invention, can realize control by various concrete control forms, for example, as a kind of preferred implementation form, referring to Fig. 5 and shown in Figure 7, hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1 share same solenoid operated directional valve (being two-position four-way solenoid operated directional valve 6 shown in Figure 5), this solenoid operated directional valve has two operating positions at least, at this reversal valve of the first operating position so that hydraulic oil is fed to the driving oil pocket of hydraulic clutch 2 and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder 1, at this reversal valve of the second operating position so that the rodless cavity of the driving oil pocket of hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1 be communicated with release with fuel tank respectively, wherein, solenoid operated directional valve gets and is in described the first operating position when electric, is in described the second operating position during dead electricity.
Be provided with pressure switch 11 on the working oil path that the reversing oil-feed of hydraulic motor travel motor 5 connects with actuator port D, thereby can be by the described oil pressure of described pressure switch 11 sensings, as everyone knows, pressure switch 11 reaches or during greater than the predetermined set value, the contact of this pressure switch 11 can be closed at the pressure of sensing.Also be in series with the coil of normal closing type relay K1 on the pressure switch 11 residing circuit, and the contact of this normal closing type relay K1 is connected on the control circuit of described solenoid operated directional valve, when the closing of contact of pressure switch 11 and so that during this pressure switch 11 residing power on circuitry, this moment, the coil of normal closing type relay K1 got electric, so that the contact of this normal closing type relay K1 disconnects, thereby the control circuit of described solenoid operated directional valve disconnects so that described reversal valve dead electricity.That is to say, when the oil pressure of pressure switch 11 sensings is equal to or greater than default oil pressure value, thereby the closing of contact of pressure switch 11 is so that this pressure switch 11 residing power on circuitry, form the signal of telecommunication that described milling machine is in the reversing state, in Fig. 5 and above-mentioned optimal way shown in Figure 7, respond this signal of telecommunication by normal closing type relay K1 and control corresponding solenoid operated directional valve commutation.
The above-mentioned specific embodiment only is the better embodiment in the technology of the present invention design scope, in fact, technical conceive of the present invention is to obtain astern signal by the sensing oil pressure, and and then corresponding this astern signal and to the control that commutates of the reversal valve of hydraulic clutch 2 and/or milling and planing drum driving-belt tensioning hydro-cylinder 1 correspondence, to realize hydraulic clutch 2 and 1 release of milling and planing drum driving-belt tensioning hydro-cylinder so that milling and planing drum 14 stalls.Under the enlightenment of the above-mentioned technical conceive of the present invention; concrete control form of the present invention is not limited to the situation by normal closing type relay solenoid operated directional valve controlled among Fig. 7; for example can adopt controller to receive the fuel injection pressure signal of the sensing of pressure switch 11 or oil pressure sensor; thereby obtain the astern signal of milling machine; and according to this astern signal control pilot operated directional control valve or solenoid operated directional valve commutation etc., these simple variant all belong to the protection domain of method of the present invention.
Concrete mode for the device of control milling and planing drum stall when milling machine is moveed backward of the present invention is below described.
The device that is used for control milling and planing drum stall when milling machine is moveed backward of fundamental technics design of the present invention comprises oil pressure sensing element and control element, this oil pressure sensing element is arranged on the working oil path that the reversing oil-feed of the hydraulic motor travel motor 5 of milling machine connects with actuator port D with the sensing oil pressure, when described control element is equal to or greater than default oil pressure value at the oil pressure of described oil pressure sensing element sensing, respond the astern signal of this oil pressure sensing element formation and control the hydraulic clutch 2 of milling machine and at least one the corresponding reversal valve commutation in the milling and planing drum driving-belt tensioning hydro-cylinder 1, so that at least one release in hydraulic clutch 2 and the milling and planing drum driving-belt tensioning hydro-cylinder 1.
As mentioned above, in the above-mentioned technical conceive scope of device of the present invention, as a kind of concrete preferred implementing form, extremely shown in Figure 7 referring to Fig. 5, above-mentioned reversal valve is the solenoid operated directional valve that hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1 share, this solenoid operated directional valve gets when electric so that hydraulic oil is fed to hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1, during dead electricity so that this hydraulic clutch 2 and 1 release of milling and planing drum driving-belt tensioning hydro-cylinder.For example, more specifically, this solenoid operated directional valve adopts an integrated two-position four-way solenoid operated directional valve 6 in the conversion valve block shown in Figure 5, being used for of the oil-in of this two-position four-way solenoid operated directional valve 6 and milling machine is communicated with (apparently to the output oil port of the auxiliary hydraulic pump 7 of described hydraulic clutch 2 and milling and planing drum driving-belt tensioning hydro-cylinder 1 fuel feeding, the input hydraulic fluid port of this auxiliary hydraulic pump 7 (being oil-in) need to communicate with fuel tank 8 by oil filter 9), the oil return opening of this two-position four-way solenoid operated directional valve 6 is communicated with fuel tank 8, the first actuator port is communicated with the driving oil pocket of hydraulic clutch 2 and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder 1 respectively, and the second actuator port sealing, this two-position four-way solenoid operated directional valve 6 when electric movement by spool so that oil-in be communicated with the first actuator port, during dead electricity so that oil return opening be communicated with the first actuator port, the principle of relevant reversal valve is known, does not repeat them here.Under the situation that adopts solenoid operated directional valve, referring to Fig. 5 and Fig. 7, oil pressure sensing element in the above-mentioned fundamental technics design scope can be pressure switch 11, on the working oil path that the reversing oil-feed that this pressure switch 11 is arranged on hydraulic motor travel motor 5 connects with actuator port D with the sensing oil pressure, above-mentioned control element can be normal closing type relay K1, the coil of this normal closing type relay K1 is connected on the described pressure switch 11 residing circuit, and the contact of this normal closing type relay K1 is connected on the control circuit of described solenoid operated directional valve.Like this, when milling machine is moveed backward, because the working oil path that the reversing oil-feed of hydraulic motor travel motor 5 connects with actuator port D drives hydraulic motor travel motor 5 counter-rotatings, the higher high-pressure side that belongs to of oil pressure, when in case oil pressure is increased to default oil pressure value, the closing of contact of pressure switch 11, so that during this pressure switch 11 residing power on circuitry, this moment, the coil of normal closing type relay K1 got electric, so that the contact of this normal closing type relay K1 disconnects, thereby the control circuit of described solenoid operated directional valve disconnects so that described solenoid operated directional valve dead electricity, correspondingly, the transmission that milling and planing drum drives power is interrupted in hydraulic clutch 2 and 1 release of milling and planing drum driving-belt tensioning hydro-cylinder, so that the stall of milling and planing drum nature.In addition, generally also be in series with milling and planing drum on the control circuit of described solenoid operated directional valve and start gauge tap S1, when milling machine advances, because the contact of normal closing type relay K1 is in normally off when not triggering, therefore the solenoid operated directional valve commutation can be controlled easily by controlling this milling and planing drum startup gauge tap S1, thereby the running of milling and planing drum 14 can be started or stoped.In case during the milling machine reversing, owing to being triggered and be in open mode in the contact of normal closing type relay K1, therefore no matter how the operator operates milling and planing drum starts gauge tap S1, the control circuit of solenoid operated directional valve all can not be switched on, correspondingly milling and planing drum also just can't start, and starts the situation of milling and planing drum when this has prevented the milling machine reversing effectively because of maloperation.
In addition, as mentioned above, referring to shown in Figure 5, typically, hydraulic motor travel motor 5 can typically be manual servo variable pump with the walking hydraulic pump 10(of milling machine) form the walking closed type hydraulic system, the second actuator port A that the pressure switch 11 of above-mentioned preferred embodiment is arranged on walking hydraulic pump 10 and the reversing oil-feed of hydraulic motor travel motor 5 are with being communicated with on the oil circuit between the actuator port D.
At Fig. 5 to the optimal way shown in Figure 8, its groundwork principle is: when milling machine advances, one side of pressure switch 11 residing hydraulic motor travel motors 5 is low-pressure side, thereby pressure switch 11 is in off-state, the holding contact on-state of normal closing type relay K1, solenoid operated directional valve (for example two-position four-way solenoid operated directional valve 6 among Fig. 5) energising and commutation when milling and planing drum starts gauge tap S1 closure, hydraulic clutch 2 is engaged, driving belt 13 tensioners, thus realize milling and planing drum 14 runnings.When the milling machine reversing retreats, one side of pressure switch 11 residing hydraulic motor travel motors 5 changes the high-pressure side into,, thus pressure switch 11 is connected, the coil electricity of normal closing type relay K1 correspondingly, its contact disconnects, when 6 outages of two-position four-way solenoid operated directional valve, thereby so that the driving oil pocket pressure release of driving-belt turgor cylinder 1 rodless cavity and hydraulic clutch 2, hydraulic clutch is separated, driving belt is lax, thereby realizes that milling and planing drum shuts down automatically, the safety when guaranteeing the milling machine reversing.
Certainly; oil pressure sensing element of the present invention and control element are not limited to the form of above-mentioned pressure switch 11 and normal closing type relay K1; for example the oil pressure sensing element can be oil pressure sensor; control element can be controller; controller receives the fuel injection pressure signal of the sensing of oil pressure sensor; thereby determine the astern signal of milling machine; and according to this astern signal control solenoid operated directional valve commutation; this is to use technical conceive of the present invention equally, so these simple variant all belong to protection scope of the present invention.
On above-mentioned basis for the technical scheme of the device of control milling and planing drum stall when milling machine is moveed backward of the present invention, the present invention also provides a kind of milling machine, and wherein, this milling machine comprises the above-mentioned device that is used for control milling and planing drum stall when milling machine is moveed backward.
Can be found out by upper description, the invention has the advantages that: the method for the time control milling and planing drum stall of moveing backward for planer of the present invention and device thereof obtain the astern signal of milling machine with the oil pressure of actuator port D by the reversing oil-feed of sensing hydraulic motor travel motor, and according to this astern signal control hydraulic clutch and/or the tensioning hydro-cylinder release of milling and planing drum driving-belt so that the milling and planing drum stall, for example under preferred embodiment, with actuator port working oil path that D connects a pressure switch 11 is installed by the reversing oil-feed at hydraulic motor travel motor, feed back astern signal by pressure switch 11, and disconnect the control circuit of solenoid operated directional valves by normal closing type relay 11, thereby the solenoid operated directional valve dead electricity, hydraulic clutch and the tensioning hydro-cylinder release of milling and planing drum driving-belt are so that the milling and planing drum stall.This is to be compared by the mechanical input mode of contact switch with the astern signal of prior art, method and apparatus of the present invention need not to obtain astern signal by the mode of machinery input, therefore reliability and safety improve greatly, its operation is more reliable, performance is more stable, and the device of control milling and planing drum of the present invention stall is not fragile, longer service life.Milling machine of the present invention comprises said apparatus, so it has above-mentioned advantage equally.
Below describe by reference to the accompanying drawings preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible combinations.
In addition, also can carry out any combination between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (15)
1. control the method for milling and planing drum stall when milling machine is moveed backward, wherein, the method comprises:
The first, the oil pressure on the working oil path that the reversing oil-feed of the hydraulic motor travel motor of the described milling machine of sensing (5) connects with actuator port (D);
Second, when described oil pressure is equal to or greater than default oil pressure value, control the hydraulic clutch (2) of described milling machine and at least one the corresponding reversal valve commutation in the milling and planing drum driving-belt tensioning hydro-cylinder (1), so that at least one release in described hydraulic clutch (2) and the milling and planing drum driving-belt tensioning hydro-cylinder (1).
2. method according to claim 1, wherein, in described second step, control the commutation of the corresponding reversal valve of described hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1), with simultaneously so that described hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1) release.
3. method according to claim 1 and 2, wherein, be provided with pressure switch (11) on the working oil path that the reversing oil-feed of described hydraulic motor travel motor (5) connects with actuator port (D), in described first step, by the described oil pressure of described pressure switch (11) sensing; In described second step, when described oil pressure is equal to or greater than default oil pressure value, described pressure switch (11) thus the closing of contact so that the residing power on circuitry of this pressure switch (11), be in the signal of telecommunication of reversing state to form described milling machine, and respond this signal of telecommunication and control corresponding described reversal valve commutation.
4. method according to claim 3, wherein, described hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1) share same described reversal valve, this reversal valve has two operating positions at least, at this reversal valve of the first operating position so that hydraulic oil is fed to the driving oil pocket of described hydraulic clutch (2) and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder (1), at this reversal valve of the second operating position so that the rodless cavity of the driving oil pocket of described hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1) be communicated with release with fuel tank respectively.
5. method according to claim 4, wherein, described reversal valve is solenoid operated directional valve, this solenoid operated directional valve gets and is in described the first operating position when electric, is in described the second operating position during dead electricity.
6. method according to claim 5, wherein, also be in series with the coil of normal closing type relay (K1) on the residing circuit of described pressure switch (11), and the contact of this normal closing type relay (K1) is connected on the control circuit of described solenoid operated directional valve, in described second step, when the closing of contact of described pressure switch (11) and so that during the residing power on circuitry of this pressure switch (11), the coil of described normal closing type relay (K1) gets electric, so that the contact of this normal closing type relay (K1) disconnects, thereby the control circuit of described solenoid operated directional valve disconnects so that described solenoid operated directional valve dead electricity.
7. the device that is used for control milling and planing drum stall when milling machine is moveed backward, wherein, described device comprises oil pressure sensing element and control element, this oil pressure sensing element is arranged on the working oil path that the reversing oil-feed of the hydraulic motor travel motor (5) of described milling machine connects with actuator port (D) with the sensing oil pressure, when described control element is equal to or greater than default oil pressure value at the oil pressure of described oil pressure sensing element sensing, respond the astern signal of this oil pressure sensing element formation and control the hydraulic clutch (2) of described milling machine and at least one the corresponding reversal valve commutation in the milling and planing drum driving-belt tensioning hydro-cylinder (1), so that at least one release in described hydraulic clutch (2) and the milling and planing drum driving-belt tensioning hydro-cylinder (1).
8. device according to claim 7, wherein, described reversal valve is the solenoid operated directional valve that described hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1) share, this solenoid operated directional valve gets when electric so that hydraulic oil is fed to hydraulic clutch (2) and the milling and planing drum driving-belt tensioning hydro-cylinder (1) of described milling machine, during dead electricity so that this hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1) release.
9. device according to claim 8, wherein, described solenoid operated directional valve is two-position four-way solenoid operated directional valve (6), being used for of the oil-in of this two-position four-way solenoid operated directional valve (6) and described milling machine is communicated with to the output oil port of the auxiliary hydraulic pump (7) of described hydraulic clutch (2) and milling and planing drum driving-belt tensioning hydro-cylinder (1) fuel feeding, oil return opening is communicated with fuel tank (8), the first actuator port is communicated with the driving oil pocket of described hydraulic clutch (2) and the rodless cavity of milling and planing drum driving-belt tensioning hydro-cylinder (1) respectively, and the sealing of the second actuator port; This two-position four-way solenoid operated directional valve (6) when electric so that described oil-in be communicated with described the first actuator port, during dead electricity so that described oil return opening be communicated with described the first actuator port.
10. according to claim 8 or 9 described devices, wherein, described oil pressure sensing element is pressure switch (11), described control element is normal closing type relay (K1), the coil of this normal closing type relay (K1) is connected on the residing circuit of described pressure switch (11), and the contact of this normal closing type relay (K1) is connected on the control circuit of described solenoid operated directional valve.
11. device according to claim 10 wherein, also is in series with milling and planing drum and starts gauge tap (S1) on the control circuit of described solenoid operated directional valve.
12. device according to claim 10, wherein, described hydraulic motor travel motor (5) forms the walking closed type hydraulic system with the walking hydraulic pump (10) of described milling machine, first actuator port (B) of wherein said walking hydraulic pump (10) is communicated with actuator port (C) with the oil-feed of advancing of described hydraulic motor travel motor (5) via flow divider (4), the second actuator port (A) is communicated with actuator port (D) with the reversing oil-feed of described hydraulic motor travel motor (5), and the inlet port of the hydraulic pump (10) of should walking is communicated with fuel tank (8); The second actuator port (A) that described pressure switch (11) is arranged on described walking hydraulic pump (10) and the reversing oil-feed of described hydraulic motor travel motor (5) are with being communicated with on the oil circuit between the actuator port (D).
13. device according to claim 10, wherein, described walking hydraulic pump is manual servo variable pump.
14. device according to claim 10, wherein, the inlet port of described walking hydraulic pump (10) is communicated with described fuel tank (8) via strainer (9).
15. milling machine, wherein, this milling machine comprises according to claim 7 each described device for control milling and planing drum stall when milling machine is moveed backward in 14.
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| CN109099020A (en) * | 2018-08-31 | 2018-12-28 | 三汽车制造有限公司 | Milling machine auxiliary control hydraulic system and milling machine |
| CN109901545A (en) * | 2017-12-08 | 2019-06-18 | 柳工常州机械有限公司 | A kind of bull-dozer safety control system and method |
| CN111673516A (en) * | 2020-06-30 | 2020-09-18 | 龙岩市武平县谨行科技有限公司 | Driving device of steel production cutting equipment |
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| CN102877404B (en) | 2015-04-15 |
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