CN110081164A - Loading machine gearbox shifting amortization multi-function variable-speed manipulates valve and its control method - Google Patents
Loading machine gearbox shifting amortization multi-function variable-speed manipulates valve and its control method Download PDFInfo
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- CN110081164A CN110081164A CN201910307365.1A CN201910307365A CN110081164A CN 110081164 A CN110081164 A CN 110081164A CN 201910307365 A CN201910307365 A CN 201910307365A CN 110081164 A CN110081164 A CN 110081164A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000006837 decompression Effects 0.000 claims abstract description 53
- 238000004146 energy storage Methods 0.000 claims abstract description 53
- 230000003139 buffering effect Effects 0.000 claims abstract description 39
- 239000003921 oil Substances 0.000 claims description 182
- 238000009825 accumulation Methods 0.000 claims description 49
- 238000009434 installation Methods 0.000 claims description 29
- 210000002445 nipple Anatomy 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 230000011664 signaling Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 18
- 230000035939 shock Effects 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
Abstract
The invention discloses a kind of loading machine gearbox shifting amortization multi-function variable-speed manipulation valve and its control methods.Belong to loading machine speed change operating valve technical field, the technical issues of which is able to solve shifting shock.Including valve body, brake apparatus is equipped in the valve body, decompression balancing device is installed in the valve body above brake apparatus, secondary energy-storage buffering device is installed on the valve body on the left of brake apparatus, gear shift device is installed on the valve body below secondary energy-storage buffering device, the first working connection being connected with decompression balancing device and brake apparatus is equipped in the valve body, the second working connection being connected with brake apparatus and secondary energy-storage buffering device is equipped in the valve body below the first working connection, second working connection is connect with balance oil communication, the working oil path being connected with gear shift device and secondary energy-storage buffering device is equipped in the valve body below the second working connection.
Description
Technical field
The present invention relates to loading machine speed change operating valve technical fields, and in particular to a kind of loading machine gearbox shifting amortization is more
Function speed change operating valve and its control method.
Background technique
The current domestic universal ZL40/50 loading machine gearbox used mostly uses the shifted manipulation of fixed shaft type machine liquid
Valve.This kind of mutation case and speed change operating valve are to introduce in the 60 to 70's of China to digest from foreign countries.But due to operation ring both domestic and external
Border is different, and operation standard when operation is different, and the operating habit of operating personnel is different, and gear shift is rushed when causing to occur loading machine operation
Hit big technical problem.Speed change is grasped by loading machine manufacturing enterprise, gearbox manufacturing enterprise, speed change operating valve manufacturing enterprise for many years
Vertical valve repeatedly carries out technological improvement, but the technical problem all without thoroughly solving shifting shock.
The clutch of the ZL40/50 gearbox of the prior art runs in rule, is that oil pressure initially runs in when being raised to 0.8MPa, oil
Pressure engagement when rising to 1.0MPa, oil pressure rise to 1.4MPa compression, original boosting curve due to oil pressure rise to 0.8MPa and
The time of 1.0MP is short, so that speed change box clutch is run in too fast, so causing shifting shock.
Summary of the invention
The present invention is to provide one kind to solve existing loading machine speed change operating valve there are the deficiency of biggish shifting shock
Increase secondary energy-storage buffering device while the installation hydraulic fluid port connection dimension of former speed change operating valve can not be changed, solves gear shift punching
The technical issues of hitting, and optimize the combination of the various structures of speed change operating valve, with meet load machine host manufacturing enterprise to gearbox,
The loading machine gearbox shifting amortization multi-function variable-speed manipulation valve and its control method of the differentiated demand of speed change operating valve.
The above technical problem is solved through the following technical scheme:
A kind of loading machine gearbox shifting amortization multi-function variable-speed manipulation valve, including valve body, the valve body is interior to be equipped with brake apparatus,
Decompression balancing device is installed in the valve body above brake apparatus, is equipped on the valve body on the left of brake apparatus secondary
Energy-storage buffering device is equipped with gear shift device on the valve body below secondary energy-storage buffering device, sets in the valve body
Have with decompression balancing device and the first working connection for being connected of brake apparatus, be equipped in the valve body below the first working connection with
The second working connection that brake apparatus is connected with secondary energy-storage buffering device, second working connection and balance oil communication connect
It connects, the work being connected with gear shift device and secondary energy-storage buffering device is equipped in the valve body below the second working connection
Oil circuit.
Preferably, the decompression balancing device includes the balance valve chamber being connected on the left of decompression valve chamber, it is described to subtract
The intracavitary installation of pressure valve has the decompression valve rod of pressurized hole, and the decompression valve rod is connected to balance slide block by relief spring compression
Right end is equipped with pressure adjustment sheet between decompression valve rod and the relief spring, the balance slide block is compressed by balancing spring to be connected
Connect it is intracavitary in balanced valve, the balance valve chamber with balance oil circuit and the first working connection be connected to and connect.
Preferably, the secondary energy-storage buffering device includes the energy-storage buffering valve opening with balance valve rod, the accumulation of energy
Buffering valve opening is connected on the second working connection, and the balance stem bottom is equipped with balance valve rod booster cavity, the balanced valve
Bar booster cavity is connected in working oil path, and the one end for balancing valve rod is socketed on energy-storaging spring, is covered on the energy-storaging spring
It is connected to accumulation of energy valve pocket, installation has the cover board of cover board paper washer on the outside of the balance valve rod, and the cover board is fixed by cover screw
It is connected on valve body, energy storage chamber and accumulation of energy Pressure Increasing Oil-Line, the accumulation of energy Pressure Increasing Oil-Line is equipped between the cover board and accumulation of energy valve pocket
Left end, which is equipped with, controls the accumulation of energy flow nipple being connected to energy storage chamber, successively sets in the accumulation of energy Pressure Increasing Oil-Line of accumulation of energy flow nipple right end
There are a check valve oil circuit and accumulation of energy oil return pipe for communicating therewith connection, on the valve body between the check valve oil circuit and accumulation of energy oil return pipe
Equipped with oil back chamber.
Needle-valve throttling nozzle assembly is dredged preferably, being equipped on the valve body being located on the right side of balance oil circuit, it is described to dredge needle
Valve throttling nozzle assembly includes the check valve oil circuit that valve body bottom end is arranged in and is connected with balance valve chamber, the check valve oil circuit
Import installation has the check valve of unidirectional valve guard, and the valve body above check valve, which is equipped with, dredges needle-valve flow nipple, described
It dredges needle-valve flow nipple and equilibrium oil road is connected to by throttle orifice, the orifice-built-in dredges needle-valve.
Second one-way valve is installed preferably, being located on the valve body dredged on the left of needle-valve, the second one-way valve includes
The control ball being mounted on check valve oil circuit, the control ball right end are equipped with second one-way valve baffle, are located at check valve oil circuit
The valve body of lower section is equipped with the check valve transition oil circuit that connection is connected to accumulation of energy Pressure Increasing Oil-Line.
Preferably, the brake apparatus includes the braking valve chamber being connected with the first working connection, the braking valve chamber is set
There is connection to be connected on the second working connection and balance oil circuit, the intracavitary installation of brake valve has the brake valve rod of pneumatic spring,
The valve body of the brake valve rod left end is equipped with the normally opened brake assemblies of closed working connection, the closed normally opened braking of working connection
Component includes the brake piston being movably connected in brake valve, and the brake piston is drivingly connected in the left end of brake pushrod, institute
The left end for stating brake piston is equipped with driving interface.
Preferably, the brake apparatus includes the braking valve chamber being connected with the first working connection, the braking valve chamber is set
There is connection to be connected on the second working connection and balance oil circuit, the intracavitary installation of brake valve has the brake valve rod of pneumatic spring,
The valve body of the brake valve rod left end is equipped with air pressure and drives the normally opened brake assemblies of air valve body working connection, and the air pressure drives air valve
The normally opened brake assemblies of body working connection include the air valve body for being mounted on air valve seat left end, and the air valve seat right end is equipped with brake valve and connects
Hook bolt, the interior installation of the air valve body have the air valve stem of spring for valve, and the air valve stem is drivingly connected in braking valve union spiral shell
Plunger in bolt, the brake valve track bolt are fixedly mounted in air valve seat by locking nut, and the air valve stem passes through Y
Type sealing ring is sealedly connected in air valve body, and the plunger is sealedly connected on brake valve track bolt by cylinder plug sealing ring
It is interior.
Preferably, the brake apparatus includes the braking valve chamber being connected with the first working connection, the braking valve chamber is set
There is connection to be connected on the second working connection and balance oil circuit, the intracavitary installation of brake valve has the brake valve rod of pneumatic spring,
The valve body of the brake valve rod left end is equipped with air pressure and drives the normally closed power cut component of working connection, and the air pressure drives working connection
Normally closed power cut component includes the air inlet valve body and fitting body for being separately mounted to inlet valve seat left and right ends, the air inlet valve body
Left end installation has the power cut valve of the second pneumatic joint, is equipped with air inlet valve lever, the air inlet valve lever in the intake valve body
It is connected on the left of inlet valve seat by power cut spring compression, the air inlet valve lever right end is drivingly connected the institute on cylindrical plag
It states inlet valve seat bottom and is equipped with the first pneumatic joint for being connected to connection with air inlet valve body.
Preferably, the gear shift device includes the manipulation valve rod being mounted in manipulation valve chamber, valve rod right end is manipulated
Equipped with the gear lever being firmly connected with it, the gear rod end is equipped with block, is equipped with embedded dust-proof shield on the left of manipulation valve rod
Cover, two sides are respectively mounted the limit steel ball with limit spring above and below gear lever, and the limit steel ball is pressed into contact in gear
On bar, the gear plug screw for limit, the valve body on the right side of block are equipped on the outside of the limit steel ball below gear lever
It is equipped with the limit signal plug screw matched with block.
Preferably, the gear shift device includes the manipulation valve rod being mounted in manipulation valve chamber, valve rod right end is manipulated
Equipped with the gear lever being firmly connected with it, the gear rod end is equipped with block, is equipped with the dust-proof shield of exterior buckle type on the left of manipulation valve rod
Cover, the exterior buckle type dust cover include the housing being mounted on the right side of valve body, are equipped in the housing and to connect with valve seal
Outside framework oil seal, the outside framework oil seal are sealedly connected on valve body by combined sealing ring, and limit is equipped on the left of the outside framework oil seal
Retaining ring, the valve body on the right side of block are equipped with the limit signal plug screw matched with block.
Preferably, the valve body bottom end is equipped with the working connection overload protection component with the control connection of the first working connection, institute
Stating working connection overload protection component includes safety valve ball, and the safety valve ball is connected to safety by safety valve spring compression
Valve chamber upper end, the installation of safety valve bottom of chamber end have the safety valve bolt of safe valve seals.
A kind of control method applying to loading machine gearbox shifting amortization multi-function variable-speed manipulation valve, the method includes
Following steps: one: decompression valve rod sets pressurized hole and connection booster cavity, enters booster cavity from pressurized hole when oil pump inputs high pressure oil
Pushed at high pressure decompression valve rod is formed between decompression balancing device afterwards to compress and make to move in relief spring, realizes decompression balancing device
Oil return decompression is set by the pressure of relief spring, the principal pressure of valve body is set between 1.1 ~ 1.6MPa；Two: in valve body liter
When pressure, check valve is automatically closed, and by throttle orifice oil inlet, is made to depressurize formation pushed at high pressure balance slide block in balancing device and is moved to right,
It compresses balancing spring and relief spring keeps pressure balance, main oil pressure is set up in the pressure limit of setting, when valve body release
When, check valve is opened rapidly, and the high pressure for depressurizing balancing device disappears, and balance slide block moves to left, due to balancing spring and relief spring
Pressure disequilibrium after, high pressure push rapidly decompression valve rod move to left, reduce oil inlet, decompression oil return opening expand, connect simultaneously
The quick oil return opening on logical the right enters oil back chamber, thus so that main oil pressure is dropped to 0.5MPa from 1.1 ~ 1.6MPa rapidly hereinafter, to
The principal pressure of setting is promptly restored to after gear switch again；Three: when valve body gear shift, working oil path decompression, balance valve rod pressurization
The pressure of accumulation of energy Pressure Increasing Oil-Line disappears while cavity pressure disappears, and second one-way valve is opened, and accumulation of energy cavity pressure disappears, by accumulation of energy bullet
Spring will balance valve rod and the separation of accumulation of energy valve pocket, respectively be moved to restraining position round about, and balance valve rod at this moment is by accumulation of energy
Buffer valve opening on oil inlet block, at this moment the hydraulic oil in secondary energy-storage buffering device postpone refunds hydraulic fluid port emptying；Work as valve body
After shift end, the oil pressure of the first working connection, the second working connection and working oil path gos up, and hydraulic oil is by balance valve rod booster cavity
Control oil circuit enter balance valve rod booster cavity；The oil pressure of accumulation of energy Pressure Increasing Oil-Line gos up simultaneously, closes check valve through dredging needle-valve
Flow nipple enters energy storage chamber, synchronous to push accumulation of energy valve pocket peace weighing apparatus valve rod opposite direction mobile, compress energy storage spring, about 0.8 ~
The working oil path oil inlet on secondary energy-storage buffering device is gently opened in the 1.6S time；Four: the tail portion for manipulating valve rod sets signal
Block, when manipulation valve rod is located in neutral gear, block is aligned with the contact-type electronic signaling switch being located above valve body, e-mail
Number switch open, to host transmit neutral gear signal, when neutral gear switches to reverse gear or drive shift, electronic signal switch close；?
Corresponding position sets hydraulic pressure signal mouth, installation hydraulic pressure signal switch, when manipulation valve rod switches to corresponding shelves respectively above valve body gear lever
When position, hydraulic pressure signal switch is opened, and is transmitted correct gear live signal to host, is held gear to facilitate operator to support at any time
Information；Five: when loading machine operation need to stop, driving gas/liquid pressure is opened, pushes brake piston, brake pushrod, brake valve rod,
Pneumatic spring is compressed, brake valve rod the first working connection of cutting and the second working connection and the oil return for passing through brake valve rod communicating valve body are made
Mouth release；After removing gas/liquid pressure, the anti-brake valve rod that pushes away of pneumatic spring resets, and working connection connection restores principal pressure, and loading machine restores
Working condition；Six: in power cut valve closing state, pushing air valve stem mounted in the intracorporal power cut spring-compressed of intake valve
The inside axis movement of brake valve rod is headed on plunger, cutting working oil path is connected to working oil path with oil back chamber, work at this moment
The oil pressure of oil circuit is 0MPa；Reach in this state and starts loading machine, even if in the case where valve body hangs shelves state, due to working oil path
Oil pressure be cut off, loading machine cannot walk, and improve the reliability of safety work；Loading machine is reached in motor starting state
Under not operation when or operation gap, be not turned on power cut valve, the main oil pressure of valve body is 0MPa；When needing the stop valve that turns on the power
When, entered between inlet valve seat and air inlet valve lever with >=0.45MPa air pressure from air valve seat the first pneumatic joint air inlet, is allowed to shape
At pressure chamber, the intracorporal residual gas of intake valve is discharged from the second pneumatic interface, the compression of power cut spring stress, outside air inlet valve lever
It moves, at this moment by the effect of pneumatic spring, makes valve rod reset of braking, after closing oil return, be connected to the first working connection and the second working connection
After resume work state, loading machine can walk；When needing to cut off working connection, gas is removed from the first pneumatic joint of inlet valve seat
Pressure pushes intake valve under the thrust of power cut spring from the second pneumatic joint interface entrance >=0.45MPa emergency air pressure
Bar, plunger, brake valve rod axially inwardly move, and cut off the first working connection and the second working connection, make the second working connection and oil return
Chamber connection, operating oil pressure at this moment are reduced to 0MPa；Seven: the oil back chamber of safe valve chamber communicating valve body, safety valve spring setting
Safe opening pressure is 1.5 times of main oil pressure, when valve body depressurized system malfunction and failure, main oil pressure moment superelevation, safety valve rolling
Pearl moves down unlatching release, it is ensured that the safe handling of valve body.
The present invention can reach following effect:
The present invention provides a kind of loading machine gearbox shifting amortization multi-function variable-speed manipulation valve and its control methods, can not change
Increase secondary energy-storage buffering device while becoming the installation hydraulic fluid port connection dimension of former speed change operating valve, solves the technology of shifting shock
Problem, and optimize the combination of the various structures of speed change operating valve, machine host manufacturing enterprise is loaded to gearbox, gear change to meet
The differentiated demand of valve.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the embodiment of the present invention.
Fig. 2 is a kind of structure sectional view of Fig. 1.
Fig. 3 is the oil circuit distribution map of Fig. 1.
Fig. 4 is a kind of structural schematic diagram that needle-valve throttling nozzle assembly is dredged in the embodiment of the present invention.
Fig. 5 is the oil circuit distribution map of secondary energy-storage buffering device in the embodiment of the present invention.
Fig. 6 is a kind of structural schematic diagram of second one-way valve in the embodiment of the present invention.
Fig. 7 is a kind of structural schematic diagram of gear shift device in the embodiment of the present invention.
Fig. 8 is a kind of structural schematic diagram of brake apparatus in the embodiment of the present invention.
Fig. 9 is a kind structural schematic diagram of brake apparatus in the embodiment of the present invention.
Figure 10 is a kind of structural schematic diagram of working connection overload protection component in the embodiment of the present invention.
In figure: valve body 1, decompression balancing device 2, brake apparatus 3, secondary energy-storage buffering device 4, gear shift device 5 are dredged
Guide pin valve throttling nozzle assembly 6, second one-way valve 7, the first working connection 8, the second working connection 9, balance oil circuit 10, working oil path 11,
Balance slide block 21, balancing spring 22, relief spring 23, pressure adjustment sheet 24, decompression valve rod 25, decompression valve chamber 26, pressurized hole 27,
Valve chamber 28 is balanced, accumulation of energy Pressure Increasing Oil-Line 40 balances valve rod booster cavity 41, balances valve rod 42, energy-storage buffering valve opening 43, accumulation of energy valve pocket
44, energy-storaging spring 45, energy storage chamber 46, cover board 47, cover board paper washer 48, cover screw 49, accumulation of energy flow nipple 401, accumulation of energy oil return pipe
402, oil back chamber 403 dredges needle-valve flow nipple 61, throttle orifice 62, dredges needle-valve 63, unidirectional valve guard 64, check valve 65, unidirectionally
Valve oil road 66, second one-way valve baffle 71 control ball 72, and check valve transition oil circuit 73, pneumatic spring 31, brake valve rod 32, system
Dynamic valve chamber 33, the closed normally opened brake assemblies 34 of working connection, brake valve 341, driving interface 342, brake piston 343, braking pushes away
Bar 344, air pressure drive the normally opened brake assemblies 35 of air valve body working connection, y-type seal ring 351, air valve seat 352, air valve stem 353, circle
Plunger sealing washer 354, plunger 355, air valve body 356, spring for valve 357, locking nut 358, brake valve track bolt 359,
The air pressure driving normally closed power cut component 36 of working connection, power cut valve 361, power cut spring 362, air inlet valve body 363, into
Air valve stem 364, inlet valve seat 365, fitting body 366, cylindrical plag 367, the second pneumatic joint 368, the first pneumatic joint 369, behaviour
Vertical valve rod 51, manipulates valve chamber 52, and limit spring 53 limits steel ball 54, gear plug screw 55, gear lever 56, block 57, limit letter
Number plug screw 58, embedded dust cover 59, exterior buckle type dust cover 50, housing 501, combined sealing ring 502, limit stop ring 503,
Outside framework oil seal 504, working connection overload protection component 13, safety valve ball 131, safe valve chamber 132, safety valve spring 133, safety
Valve seals 134, safety valve bolt 135.
Specific embodiment
The present invention is described further with embodiment with reference to the accompanying drawing.
A kind of embodiment 1, loading machine gearbox shifting amortization multi-function variable-speed manipulation valve, joins as shown in figure 1 to 3, including valve
Body 1, the valve body 1 is interior to be equipped with brake apparatus 3, and decompression balancing device 2, position are equipped in the valve body 1 above brake apparatus 3
In being equipped with secondary energy-storage buffering device 4 on the valve body 1 in the left side of brake apparatus 3, the valve positioned at secondary 4 lower section of energy-storage buffering device
Gear shift device 5 is installed on body 1, the to be connected with decompression balancing device 2 and brake apparatus 3 is equipped in the valve body 1
One working connection 8 is equipped in the valve body 1 of 8 lower section of the first working connection and is connected with brake apparatus 3 and secondary energy-storage buffering device 4
The second logical working connection 9, second working connection 9 are connected to connection with balance oil circuit 10, the valve body positioned at 9 lower section of the second working connection
The working oil path 11 being connected with gear shift device 5 and secondary energy-storage buffering device 4 is equipped in 1.
Shown in referring to figure 2-3, the decompression balancing device 2 includes the balance valve chamber for being connected to 26 left side of decompression valve chamber
28, the interior installation of decompression valve chamber 26 has the decompression valve rod 25 of pressurized hole 27, and the decompression valve rod 25 passes through relief spring 23
The right end for being connected to balance slide block 21 is compressed, pressure adjustment sheet 24, institute are equipped between the decompression valve rod 25 and relief spring 23
Balance slide block 21 is stated to be connected in balance valve chamber 28 by the compression of balancing spring 22, the balance valve chamber 28 with balance oil circuit 10 and
First working connection 8 is connected to connection.The secondary energy-storage buffering device 4 includes the energy-storage buffering valve opening with balance valve rod 42
43, the energy-storage buffering valve opening 43 is connected on the second working connection 9, and 42 bottom of balance valve rod is equipped with balance valve rod and increases
Chamber 41 is pressed, the balance valve rod booster cavity 41 is connected in working oil path 11, and one end of balance valve rod 42 is socketed in accumulation of energy
On spring 45, accumulation of energy valve pocket 44 is socketed on the energy-storaging spring 45, installation has cover board paper washer on the outside of the balance valve rod 42
48 cover board 47, the cover board 47 are fixedly connected on valve body 1 by cover screw 49, the cover board 47 and accumulation of energy valve pocket 44 it
Between be equipped with energy storage chamber 46 and accumulation of energy Pressure Increasing Oil-Line 40,40 left end of accumulation of energy Pressure Increasing Oil-Line is equipped with to control with energy storage chamber 46 and be connected to
Accumulation of energy flow nipple 401 is successively arranged the list for communicating therewith connection in the accumulation of energy Pressure Increasing Oil-Line 40 of 401 right end of accumulation of energy flow nipple
To valve oil road 66 and accumulation of energy oil return pipe 402, the valve body 1 between the check valve oil circuit 66 and accumulation of energy oil return pipe 402 is equipped with back
Oil pocket 403.The brake apparatus 3 includes the braking valve chamber 33 being connected with the first working connection 8, and the braking valve chamber 33, which is equipped with, to be connected
Logical to be connected on the second working connection 9 and balance oil circuit 10, installation has the brake valve of pneumatic spring 31 in the braking valve chamber 33
The valve body 1 of bar 32, brake 32 left end of valve rod is equipped with the normally opened brake assemblies 34 of closed working connection, the closed main oil
The normally opened brake assemblies 34 in road include the brake piston 343 being movably connected in brake valve 341, and the driving of brake piston 343 connects
It connects in the left end of brake pushrod 344, the left end of the brake piston 343 is equipped with driving interface 342.The gear shift device 5
Including the manipulation valve rod 51 being mounted in manipulation valve chamber 52, manipulation 51 right end of valve rod is equipped with the gear lever 56 being firmly connected with it,
56 end of gear lever is equipped with block 57, manipulates and is equipped with embedded dust cover 59 on the left of valve rod 51, is located on gear lever 56
Lower two sides are respectively mounted the limit steel ball 54 with limit spring 53, and the limit steel ball 54 is pressed into contact on gear lever 56, position
The gear plug screw 55 for limit, the valve body positioned at 57 right side of block are equipped on the outside of the limit steel ball 54 of 56 lower section of gear lever
1 is equipped with the limit signal plug screw 58 matched with block 57.
It is shown in Figure 4, it is equipped on the valve body 1 on 10 right side of balance oil circuit and dredges needle-valve throttling nozzle assembly 6, it is described
Dredging needle-valve throttling nozzle assembly 6 includes the check valve oil circuit 66 that 1 bottom end of valve body is arranged in and is connected with balance valve chamber 28, described
The import installation of check valve oil circuit 66 has the check valve 65 of unidirectional valve guard 64, sets on the valve body 1 above check valve 65
Needle-valve flow nipple 61 is dredged, the needle-valve flow nipple 61 of dredging is connected on balance oil circuit 10 by throttle orifice 62, institute
It states to be equipped in throttle orifice 62 and dredges needle-valve 63.
It is shown in Figure 6, second one-way valve 7 is installed on the valve body 1 for dredging 63 left side of needle-valve, described second is unidirectional
Valve 7 includes the control ball 72 being mounted on check valve oil circuit 66, and 72 right end of control ball is equipped with second one-way valve baffle 71,
Valve body 1 positioned at 66 lower section of check valve oil circuit is equipped with the check valve transition oil circuit 73 that connection is connected to accumulation of energy Pressure Increasing Oil-Line 40.
Shown in Figure 10,1 bottom end of valve body is equipped with the working connection overload protection group with the control connection of the first working connection 8
Part 13, the working connection overload protection component 13 include safety valve ball 131, and the safety valve ball 131 passes through safety valve bullet
The compression of spring 133 is connected to safe 132 upper end of valve chamber, and safe 132 bottom end of the valve chamber installation has the peace of safe valve seals 134
Full valve bolt 135.
A kind of control method applying to loading machine gearbox shifting amortization multi-function variable-speed manipulation valve, the method includes
Following steps: one: decompression valve rod 25 set pressurized hole 27 and connection booster cavity 28, when oil pump input high pressure oil when from pressurized hole 27 into
Pushed at high pressure decompression valve rod 25 compression is formed between decompression balancing device 2 after entering booster cavity 28 and makes to move in relief spring 23,
It realizes decompression 2 oil return of balancing device decompression, is set by the pressure of relief spring 23, the principal pressure of valve body 1 is set in 1.1 ~
Between 1.6MPa；Two: when valve body 1 boosts, check valve 65 is automatically closed, and by 62 oil inlet of throttle orifice, makes to depressurize balancing device 2
Interior formation pushed at high pressure balance slide block 21 moves to right, and compresses balancing spring 22 and relief spring 23 keeps pressure balance, by main oil pressure
It sets up in the pressure limit of setting, when 1 release of valve body, check valve 65 is opened rapidly, and the high pressure of decompression balancing device 2 disappears
It loses, balance slide block 21 moves to left, since after the pressure disequilibrium of balancing spring 22 and relief spring 23, high pressure pushes rapidly decompression
Valve rod 25 moves to left, and reduces oil inlet, and decompression oil return opening expands, while the quick oil return opening for being connected to the right enters oil back chamber 403,
To make main oil pressure drop to 0.5MPa from 1.1 ~ 1.6MPa rapidly hereinafter, to after gear switch and the master of setting is promptly restored to
Pressure；Three: when 1 gear shift of valve body, 11 decompression of working oil path, accumulation of energy pressurised oil while balance 41 pressure of valve rod booster cavity disappears
The pressure on road 40 disappears, and second one-way valve 7 is opened, and 46 pressure of energy storage chamber disappears, and will be balanced valve rod 42 by energy-storaging spring 45 and be stored
Energy valve pocket 44 separates, and is respectively moved to restraining position round about, balance valve rod 42 at this moment will be on energy-storage buffering valve opening 43
Oil inlet block, at this moment the hydraulic oil in secondary energy-storage buffering device 4 postpone refunds hydraulic fluid port emptying；When 1 shift end of valve body
Afterwards, the oil pressure of the first working connection 8, the second working connection 9 and working oil path 11 gos up, and hydraulic oil is by balance valve rod booster cavity 41
Control oil circuit enters balance valve rod booster cavity 41；The oil pressure of accumulation of energy Pressure Increasing Oil-Line 40 gos up simultaneously, closes check valve 65 through dredging
Needle-valve flow nipple 61 enters energy storage chamber 46, synchronous to push accumulation of energy valve pocket 44 and balance 42 opposite direction of valve rod mobile, compress energy storage
Spring 45 gently opens the working oil path oil inlet on secondary energy-storage buffering device 4 within about 0.8 ~ 1.6S time；Four: manipulation
The tail portion of valve rod 51 sets block 57, when manipulating valve rod 51 and being located in neutral gear, block 57 and the contact being located above valve body 1
The alignment of formula electronic signal switch, electronic signal switch are opened, and neutral gear signal are transmitted to host, when neutral gear switches to reverse gear or advance
When shelves, electronic signal switch is closed；Corresponding position sets hydraulic pressure signal mouth respectively above 1 gear lever 56 of valve body, installs hydraulic pressure signal
Switch, when manipulation valve rod 51 switches to corresponding gear, hydraulic pressure signal switch is opened, and it is real-time to transmit correct gear to host
Signal holds gear information to facilitate operator to support at any time；Five: when loading machine operation need to stop, opening driving gas/liquid pressure, push away
Dynamic brake piston 343, brake pushrod 344, brake valve rod 32, compress pneumatic spring 31, make the first main oil of cutting of valve rod 32 that brakes
Road 8 is connected to the oil return opening release of valve body 1 with the second working connection 9 and by the valve rod 32 that brakes；After removing gas/liquid pressure, pneumatic spring
The 31 anti-brake valve rods 32 that push away reset, and working connection connection restores principal pressure, and loading machine is resumed work state；Six: in power cut valve
When 361 closed state, the compression of power cut spring 362 in air inlet valve body 363 pushes air valve stem 353 and plunger 355
It is mobile to inner shaft to head on brake valve rod 32, cutting working oil path 11 is connected to working oil path 11 with oil back chamber 403, work at this moment
The oil pressure of oil circuit 11 is 0MPa；Reach in this state and starts loading machine, even if in the case where valve body 1 hangs shelves state, due to work
The oil pressure of oil circuit 11 is cut off, and loading machine cannot walk, and improve the reliability of safety work；Reach loading machine to open in motor
Under dynamic state when not operation or operation gap, it is not turned on power cut valve 361, the main oil pressure of valve body 1 is 0MPa；When needing to open
When power cut valve 361, enter inlet valve seat from 352 first pneumatic joint of air valve seat, 369 air inlet with >=0.45MPa air pressure
Between 365 and air inlet valve lever 364, it is allowed to form pressure chamber, the residual gas in air inlet valve body 363 is discharged from the second pneumatic interface 368,
362 forced compression of power cut spring, air inlet valve lever 364 move outside, at this moment by the effect of pneumatic spring 31, keep brake valve rod 32 multiple
Position, after closing oil return, state of resuming work after the first working connection 8 of connection and the second working connection 9, loading machine can walk；When need
When cutting off working connection, air pressure is removed from 365 first pneumatic joint 369 of inlet valve seat, is entered from 368 interface of the second pneumatic joint
>=0.45MPa emergency air pressure pushes air inlet valve lever 364, plunger 355, brake valve rod under the thrust of power cut spring 362
32 axially inwardly move, and cut off the first working connection 8 and the second working connection 9, are connected to the second working connection 9 with oil back chamber 403, at this moment
Operating oil pressure be reduced to 0MPa；Seven: safe valve chamber 132 is connected to the oil back chamber 403 of valve body 1, the peace that safety valve spring 133 is set
Full open pressure is 1.5 times of main oil pressure, when 1 depressurized system malfunction and failure of valve body, main oil pressure moment superelevation, safety valve ball
131 move down unlatching release, it is ensured that the safe handling of valve body 1.
Embodiment 2, shown in Figure 7, the gear shift device 5 includes the manipulation valve rod being mounted in manipulation valve chamber 52
51, manipulation 51 right end of valve rod is equipped with the gear lever 56 being firmly connected with it, and 56 end of gear lever is equipped with block 57, manipulates valve
It is equipped with embedded dust cover 59 on the left of bar 51, is respectively mounted the limit steel with limit spring 53 positioned at about 56 two sides of gear lever
Ball 54, the limit steel ball 54 are pressed into contact on gear lever 56, are equipped on the outside of the limit steel ball 54 of 56 lower section of gear lever
For the gear plug screw 55 of limit, the valve body 1 positioned at 57 right side of block is equipped with the limit signal matched with block 57
Plug screw 58.Remaining is the same as embodiment 1.
Embodiment 3, shown in Figure 8, the brake apparatus 3 includes the braking valve chamber 33 being connected with the first working connection 8,
The braking valve chamber 33, which is equipped with, to be connected on the second working connection 9 and balance oil circuit 10, installs band in the braking valve chamber 33
There is the brake valve rod 32 of pneumatic spring 31, the valve body 1 of brake 32 left end of valve rod is equipped with air pressure and drives air valve body working connection
Normally opened brake assemblies 35, the air pressure driving normally opened brake assemblies 35 of air valve body working connection include being mounted on 352 left end of air valve seat
Air valve body 356,352 right end of air valve seat is equipped with brake valve track bolt 359, and installation has in the air valve body 356
The air valve stem 353 of spring for valve 357, the air valve stem 353 are drivingly connected the plunger 355 in brake valve track bolt 359,
The brake valve track bolt 359 is fixedly mounted in air valve seat 352 by locking nut 358, and the air valve stem 353 passes through Y
Type sealing ring 351 is sealedly connected in air valve body 356, and the plunger 355 is sealedly connected on system by cylinder plug sealing ring 354
In dynamic valve union bolt 359.Remaining is the same as embodiment 1.
Embodiment 4, shown in Figure 9, the brake apparatus 3 includes the braking valve chamber 33 being connected with the first working connection 8,
The braking valve chamber 33, which is equipped with, to be connected on the second working connection 9 and balance oil circuit 10, installs band in the braking valve chamber 33
There is the brake valve rod 32 of pneumatic spring 31, it is normally closed dynamic that the valve body 1 of brake 32 left end of valve rod is equipped with air pressure driving working connection
Power cutting assembly 36, the air pressure driving normally closed power cut component 36 of working connection include being separately mounted to 365 left side of inlet valve seat
The air inlet valve body 363 and fitting body 366 at right both ends, 363 left end of the air inlet valve body installation is with the dynamic of the second pneumatic joint 368
Power stop valve 361, the air inlet valve body 363 is interior to be equipped with air inlet valve lever 364, and the air inlet valve lever 364 passes through power cut spring
362 compress and are connected to the left side of inlet valve seat 365, and 364 right end of air inlet valve lever is drivingly connected on cylindrical plag 367, it is described into
365 bottom of air valve seat is equipped with the first pneumatic joint 369 that connection is connected to air inlet valve body 363.Remaining is the same as embodiment 1.
The present invention provides a kind of loading machine gearbox shifting amortization multi-function variable-speed manipulation valve and its control methods, can
Increase secondary energy-storage buffering device while not changing the installation hydraulic fluid port connection dimension of former speed change operating valve, solves shifting shock
Technical problem, and optimize the combination of the various structures of speed change operating valve, machine host manufacturing enterprise is loaded to gearbox, speed change to meet
The differentiated demand of valve is manipulated, and structure is simple, easy to use, high reliablity.
Embodiments of the present invention are described above in conjunction with attached drawing, however, the implementation is not limited to the above embodiments, this field
Those of ordinary skill can various changes and modifications may be made within the scope of the appended claims.
Claims (12)
1. a kind of loading machine gearbox shifting amortization multi-function variable-speed manipulates valve, including valve body (1), which is characterized in that the valve
Brake apparatus (3) are equipped in body (1), is located in the valve body (1) above brake apparatus (3) and decompression balancing device (2) is installed, position
Secondary energy-storage buffering device (4) is installed on the valve body (1) on the left of brake apparatus (3), is located at secondary energy-storage buffering device (4)
It is equipped with gear shift device (5), is equipped in the valve body (1) and decompression balancing device (2) and braking on the valve body (1) of lower section
The first working connection (8) that device (3) is connected is located in the valve body (1) below the first working connection (8) and is equipped with and brake apparatus
(3) the second working connection (9) being connected with secondary energy-storage buffering device (4), second working connection (9) and balance oil circuit (10)
Connection connection is located in the valve body (1) below the second working connection (9) and is equipped with and gear shift device (5) and secondary energy-storage buffering
The working oil path (11) that device (4) is connected.
2. loading machine gearbox shifting amortization multi-function variable-speed according to claim 1 manipulates valve, which is characterized in that described
Decompression balancing device (2) includes the balance valve chamber (28) being connected on the left of decompression valve chamber (26), the decompression valve chamber (26)
Interior installation has the decompression valve rod (25) of pressurized hole (27), and the decompression valve rod (25) is compressed by relief spring (23) and is connected to
The right end of balance slide block (21) is equipped with pressure adjustment sheet (24) between the decompression valve rod (25) and relief spring (23), described
Balance slide block (21) is compressed by balancing spring (22) and is connected in balance valve chamber (28), the balance valve chamber (28) and equilibrium oil
Road (10) is connected to connection with the first working connection (8).
3. loading machine gearbox shifting amortization multi-function variable-speed according to claim 2 manipulates valve, which is characterized in that described
Secondary energy-storage buffering device (4) includes the energy-storage buffering valve opening (43) with balance valve rod (42), the energy-storage buffering valve opening
(43) it is connected on the second working connection (9), the balance valve rod (42) bottom is equipped with balance valve rod booster cavity (41), described
Balance valve rod booster cavity (41) is connected on working oil path (11), and one end of balance valve rod (42) is socketed in energy-storaging spring
(45) it on, is socketed with accumulation of energy valve pocket (44) on the energy-storaging spring (45), installation has cover board on the outside of the balance valve rod (42)
The cover board (47) of paper washer (48), the cover board (47) are fixedly connected on valve body (1) by cover screw (49), the cover board
(47) energy storage chamber (46) and accumulation of energy Pressure Increasing Oil-Line (40) are equipped between accumulation of energy valve pocket (44), the accumulation of energy Pressure Increasing Oil-Line (40) is left
End, which is equipped with, controls the accumulation of energy flow nipple (401) being connected to energy storage chamber (46), and the accumulation of energy for being located at accumulation of energy flow nipple (401) right end is pressurized
The check valve oil circuit (66) and accumulation of energy oil return pipe (402) for communicating therewith connection, the unidirectional valve oil are successively arranged on oil circuit (40)
Valve body (1) between road (66) and accumulation of energy oil return pipe (402) is equipped with oil back chamber (403).
4. loading machine gearbox shifting amortization multi-function variable-speed according to claim 3 manipulates valve, which is characterized in that be located at
It is equipped on valve body (1) on the right side of balance oil circuit (10) and dredges needle-valve throttling nozzle assembly (6), it is described to dredge needle-valve throttling nozzle assembly
(6) include setting valve body (1) bottom end and with balance valve chamber (28) the check valve oil circuit (66) that is connected, the check valve oil circuit
(66) import installation has the check valve (65) of unidirectional valve guard (64), is located on the valve body (1) above check valve (65) and sets
It dredges needle-valve flow nipple (61), it is described to dredge needle-valve flow nipple (61) and be connected to balance oil circuit by throttle orifice (62)
(10) it on, is equipped in the throttle orifice (62) and dredges needle-valve (63).
5. loading machine gearbox shifting amortization multi-function variable-speed according to claim 4 manipulates valve, which is characterized in that be located at
It dredges and is equipped with second one-way valve (7) on the valve body (1) on the left of needle-valve (63), the second one-way valve (7) includes being mounted on list
Control ball (72) on valve oil road (66), control ball (72) right end are equipped with second one-way valve baffle (71), are located at single
The check valve transition oil circuit that connection is connected to accumulation of energy Pressure Increasing Oil-Line (40) is equipped with to the valve body (1) below valve oil road (66)
(73).
6. being grasped according to claim 1 to loading machine gearbox shifting amortization multi-function variable-speed described in any one of 5 claims
Vertical valve, which is characterized in that the brake apparatus (3) includes the braking valve chamber (33) being connected with the first working connection (8), the system
Dynamic valve chamber (33), which are equipped with, to be connected on the second working connection (9) and balance oil circuit (10), installation in the braking valve chamber (33)
The valve body (1) of brake valve rod (32) with pneumatic spring (31), described brake valve rod (32) left end is equipped with closed main oil
The normally opened brake assemblies in road (34), the closed normally opened brake assemblies of working connection (34) include being movably connected in brake valve (341)
Interior brake piston (343), the brake piston (343) are drivingly connected in the left end of brake pushrod (344), the brake piston
(343) left end is equipped with driving interface (342).
7. being grasped according to claim 1 to loading machine gearbox shifting amortization multi-function variable-speed described in any one of 5 claims
Vertical valve, which is characterized in that the brake apparatus (3) includes the braking valve chamber (33) being connected with the first working connection (8), the system
Dynamic valve chamber (33), which are equipped with, to be connected on the second working connection (9) and balance oil circuit (10), installation in the braking valve chamber (33)
Brake valve rod (32) with pneumatic spring (31), the valve body (1) of described brake valve rod (32) left end are equipped with air pressure and drive gas
The normally opened brake assemblies of valve body working connection (35), the air pressure driving normally opened brake assemblies of air valve body working connection (35) include being mounted on
The air valve body (356) of air valve seat (352) left end, air valve seat (352) right end are equipped with brake valve track bolt (359), institute
The air valve stem (353) that installation in air valve body (356) has spring for valve (357) is stated, the air valve stem (353) is drivingly connected and is making
Plunger (355) in dynamic valve union bolt (359), the brake valve track bolt (359) are fixed by locking nut (358)
It being mounted on air valve seat (352), the air valve stem (353) is sealedly connected in air valve body (356) by y-type seal ring (351),
The plunger (355) is sealedly connected in brake valve track bolt (359) by cylinder plug sealing ring (354).
8. being grasped according to claim 1 to loading machine gearbox shifting amortization multi-function variable-speed described in any one of 5 claims
Vertical valve, which is characterized in that the brake apparatus (3) includes the braking valve chamber (33) being connected with the first working connection (8), the system
Dynamic valve chamber (33), which are equipped with, to be connected on the second working connection (9) and balance oil circuit (10), installation in the braking valve chamber (33)
Brake valve rod (32) with pneumatic spring (31), the valve body (1) of described brake valve rod (32) left end are equipped with air pressure driving master
The normally closed power cut component (36) of oil circuit, the air pressure driving normally closed power cut component (36) of working connection includes being separately mounted to
Band is installed in the air inlet valve body (363) and fitting body (366) of inlet valve seat (365) left and right ends, air inlet valve body (363) left end
There is the power cut valve (361) of the second pneumatic joint (368), is equipped with air inlet valve lever (364) in the air inlet valve body (363), institute
It states air inlet valve lever (364) to be connected on the left of inlet valve seat (365) by power cut spring (362) compression, the air inlet valve lever
(364) right end is drivingly connected on cylindrical plag (367), and inlet valve seat (365) bottom is equipped with and is connected to air inlet valve body (363)
The first pneumatic joint (369) of connection.
9. being grasped according to claim 1 to loading machine gearbox shifting amortization multi-function variable-speed described in any one of 5 claims
Vertical valve, which is characterized in that the gear shift device (5) includes the manipulation valve rod (51) being mounted in manipulation valve chamber (52), behaviour
Vertical valve rod (51) right end is equipped with the gear lever (56) being firmly connected with it, and gear lever (56) end is equipped with block (57), behaviour
Embedded dust cover (59) are equipped on the left of vertical valve rod (51), is located at gear lever (56) and is respectively mounted up and down with limit spring two sides
(53) limit steel ball (54), the limit steel ball (54) are pressed into contact on gear lever (56), are located at below gear lever (56)
Limit steel ball (54) on the outside of be equipped with for limit gear plug screw (55), be located at block (57) on the right side of valve body (1) on set
Have and block (57) matched limit signal plug screw (58).
10. being grasped according to claim 1 to loading machine gearbox shifting amortization multi-function variable-speed described in any one of 5 claims
Vertical valve, which is characterized in that the gear shift device (5) includes the manipulation valve rod (51) being mounted in manipulation valve chamber (52), behaviour
Vertical valve rod (51) right end is equipped with the gear lever (56) being firmly connected with it, and gear lever (56) end is equipped with block (57), behaviour
Exterior buckle type dust cover (50) are equipped on the left of vertical valve rod (51), the exterior buckle type dust cover (50) includes being mounted on valve body (1)
The housing (501) on right side, the housing (501) is interior to be equipped with the outside framework oil seal (504) being tightly connected with valve body (1), the skeleton
Oil sealing (504) is sealedly connected on valve body (1) by combined sealing ring (502), and limit is equipped on the left of the outside framework oil seal (504)
Retaining ring (503) is located at the valve body (1) on the right side of block (57) and is equipped with the limit signal plug screw matched with block (57)
(58).
11. loading machine gearbox shifting amortization multi-function variable-speed according to claim 1 manipulates valve, which is characterized in that institute
It states valve body (1) bottom end and is equipped with the working connection overload protection component (13) connected with the first working connection (8) control, the working connection mistake
Carrying protection component (13) includes safety valve ball (131), and the safety valve ball (131) is compressed by safety valve spring (133)
It is connected to safe valve chamber (132) upper end, safe valve chamber (132) the bottom end installation has the safety of safe valve seals (134)
Valve bolt (135).
12. a kind of control method for applying to loading machine gearbox shifting amortization multi-function variable-speed manipulation valve, the method includes
Following steps: one: decompression valve rod (25) sets pressurized hole (27) and connection booster cavity (28), when oil pump inputs high pressure oil Shi Congzeng
Pressure hole (27) enters booster cavity (28), and formation pushed at high pressure decompression valve rod (25) is compressed and is made between decompression balancing device (2) afterwards
It is moved in relief spring (23), realizes decompression balancing device (2) oil return decompression, set by the pressure of relief spring (23), by valve body
(1) principal pressure is set between 1.1 ~ 1.6MPa；Two: when valve body (1) boosts, check valve (65) is automatically closed, and passes through section
Discharge orifice (62) oil inlet makes to depressurize formation pushed at high pressure balance slide block (21) in balancing device (2) and moves to right, compresses balancing spring (22)
Pressure balance is kept with relief spring (23), main oil pressure is set up in the pressure limit of setting, it is single when valve body (1) release
It is opened rapidly to valve (65), the high pressure of decompression balancing device (2) disappears, and balance slide block (21) moves to left, due to balancing spring (22)
After the pressure disequilibrium of relief spring (23), high pressure pushes rapidly decompression valve rod (25) to move to left, and reduces oil inlet, depressurizes
Oil return opening expands, while the quick oil return opening for being connected to the right enters oil back chamber (403), thus make main oil pressure rapidly from 1.1 ~
1.6MPa drops to 0.5MPa hereinafter, to after gear switch and the principal pressure of setting is promptly restored to；Three: when valve body (1) gear shift
When, working oil path (11) decompression, the pressure of accumulation of energy Pressure Increasing Oil-Line (40) disappears while balance valve rod booster cavity (41) pressure disappears
It loses, second one-way valve (7) is opened, and energy storage chamber (46) pressure disappears, and will balance valve rod (42) and accumulator valve by energy-storaging spring (45)
(44) separation is covered, is respectively moved to restraining position round about, balance valve rod (42) at this moment is by energy-storage buffering valve opening (43)
On oil inlet block, at this moment the hydraulic oil in secondary energy-storage buffering device (4) postpone refunds hydraulic fluid port emptying；When valve body (1) changes
After shelves, the oil pressure of the first working connection (8), the second working connection (9) and working oil path (11) gos up, and hydraulic oil passes through balanced valve
The control oil circuit of bar booster cavity (41) enters balance valve rod booster cavity (41)；The oil pressure of accumulation of energy Pressure Increasing Oil-Line (40) gos up simultaneously,
It closes check valve (65) and is dredged needle-valve flow nipple (61) into energy storage chamber (46), synchronous promotion accumulation of energy valve pocket (44) and balanced valve
Bar (42) opposite direction is mobile, compress energy storage spring (45), and secondary energy-storage buffering dress is gently opened within about 0.8 ~ 1.6S time
Set the working oil path oil inlet on (4)；Four: the tail portion of manipulation valve rod (51) sets block (57), when manipulation valve rod (51) positioning
In neutral gear, block (57) is aligned with the contact-type electronic signaling switch being located above valve body (1), and electronic signal switch is beaten
It opens, transmits neutral gear signal to host, when neutral gear switches to reverse gear or drive shift, electronic signal switch is closed；In valve body (1) shelves
Corresponding position sets hydraulic pressure signal mouth, installation hydraulic pressure signal switch, when manipulation valve rod (51) switches to accordingly respectively above position bar (56)
When gear, hydraulic pressure signal switch is opened, and is transmitted correct gear live signal to host, is held shelves to facilitate operator to support at any time
Position information；Five: when loading machine operation need to stop, opening driving gas/liquid pressure, push brake piston (343), brake pushrod
(344), it brakes valve rod (32), compresses pneumatic spring (31), make brake valve rod (32) cutting the first working connection (8) and the second main oil
Road (9) simultaneously passes through the oil return opening release of brake valve rod (32) connection valve body (1)；After removing gas/liquid pressure, pneumatic spring (31) is counter to be pushed away
Brake valve rod (32) reset, working connection connection restores principal pressure, and loading machine is resumed work state；Six: in power cut valve
(361) when closed state, power cut spring (362) compression in air inlet valve body (363) pushes air valve stem (353) and circle
Plunger (355) heads on brake valve rod (32) to inner shaft movement, and cutting working oil path (11) makes working oil path (11) and oil back chamber
(403) it is connected to, the oil pressure of working oil path (11) at this moment is 0MPa；Reach in this state and start loading machine, even if in valve
Body (1) is hung under shelves state, and since the oil pressure of working oil path (11) is cut off, loading machine cannot walk, and improve safety work
Reliability；Reach loading machine and when not operation or operation gap, be not turned on power cut valve (361) under motor starting state,
The main oil pressure of valve body (1) is 0MPa；When need to turn on the power stop valve (361) when, with >=0.45MPa air pressure from air valve seat
(352) first pneumatic joint (369) air inlets enter between inlet valve seat (365) and air inlet valve lever (364), are allowed to form pressure
Chamber, the residual gas in air inlet valve body (363) are discharged from the second pneumatic interface (368), power cut spring (362) forced compression, into
Air valve stem (364) moves outside, at this moment by the effect of pneumatic spring (31), make to brake valve rod (32) reset, after closing oil return, connection the
Resume work behind one working connection (8) and the second working connection (9) state, loading machine can walk；When needing to cut off working connection, from
(365) first pneumatic joint (369) of inlet valve seat removes air pressure, and from the second pneumatic joint (368), interface entrance >=0.45MPa is answered
Anxious air pressure pushes air inlet valve lever (364), plunger (355), brake valve rod (32) under the thrust of power cut spring (362)
It axially inwardly moves, cutting the first working connection (8) and the second working connection (9), makes the second working connection (9) and oil back chamber (403) even
Logical, operating oil pressure at this moment is reduced to 0MPa；Seven: the oil back chamber (403) of safe valve chamber (132) connection valve body (1), safety valve
The safe opening pressure that spring (133) is set is 1.5 times of main oil pressure, when valve body (1) depressurized system malfunction and failure, main oil pressure wink
Between superelevation when, safety valve ball (131) moves down unlatching release, it is ensured that the safe handling of valve body (1).
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| CN112178176A (en) * | 2020-08-19 | 2021-01-05 | 江西液压件股份有限公司 | Variable speed operating valve and valve body thereof and variable speed gear shifting system with variable speed operating valve |
| CN112303219A (en) * | 2020-07-03 | 2021-02-02 | 杭州萧山叉车配件有限公司 | Variable speed control valve with controllable and adjustable dynamic curve |
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| CN202659878U (en) * | 2012-08-31 | 2013-01-09 | 杭州萧山叉车配件有限公司 | Five-gear variable speed control valve |
| CN203230840U (en) * | 2013-03-22 | 2013-10-09 | 杭州萧山叉车配件有限公司 | Speed change valve with neutral signal control device for loader |
| CN106122143A (en) * | 2016-06-29 | 2016-11-16 | 杭州萧山叉车配件有限公司 | Loader power shift level 2 buffering handles valve |
| CN208123145U (en) * | 2018-04-20 | 2018-11-20 | 杭州萧山叉车配件有限公司 | Loading machine speed change operating valve energy-storage buffering component |
| CN208281487U (en) * | 2018-04-20 | 2018-12-25 | 杭州萧山叉车配件有限公司 | The speed change operating valve of the built-in neutral signal device of loading machine |
| CN210218658U (en) * | 2019-04-17 | 2020-03-31 | 杭州萧山叉车配件有限公司 | Multifunctional gear-shifting buffering variable-speed control valve of loader gearbox |
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| CN112303219A (en) * | 2020-07-03 | 2021-02-02 | 杭州萧山叉车配件有限公司 | Variable speed control valve with controllable and adjustable dynamic curve |
| CN112178176A (en) * | 2020-08-19 | 2021-01-05 | 江西液压件股份有限公司 | Variable speed operating valve and valve body thereof and variable speed gear shifting system with variable speed operating valve |
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