CN108679028A - A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application - Google Patents
A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application Download PDFInfo
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- CN108679028A CN108679028A CN201810926302.XA CN201810926302A CN108679028A CN 108679028 A CN108679028 A CN 108679028A CN 201810926302 A CN201810926302 A CN 201810926302A CN 108679028 A CN108679028 A CN 108679028A
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- Prior art keywords
- spool
- power unit
- hydraulic power
- valve block
- adjusting
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
- F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
Abstract
The invention discloses a kind of hydraulic power unit valve block structures and hydraulic power unit and the fork truck of application, belong to hydraulic pressure fueling technology field.The hydraulic power unit valve block structure and hydraulic power unit of the present invention, two groups of valve spools in valve block are controlled by the mandril that rotary extension moves, the gradual change for dexterously realizing fuel supply flow rate is adjusted, flow-rate adjustment simple and stable, and control oil return action can be rotated by mandril, without installing all kinds of solenoid electric valves additional in valve block, the structure of valve block is simplified, simpler convenience is operated；It is additionally provided with relief valve in valve block simultaneously, ensure that equipment charge oil pressure safety and stability, there is extraordinary application value.The fork truck using above-mentioned hydraulic power unit of the present invention operates simpler safety by using above-mentioned hydraulic power unit, fork truck lifting action more to smooth out on fork truck.
Description
Technical field
The present invention relates to a kind of hydraulic oil supply unit, more specifically to a kind of hydraulic power unit valve block structure and
Hydraulic power unit and the fork truck of application.
Background technology
It is many because of the advantages that hydraulic drive is light-weight, small, motional inertia is small, reaction speed is fast in machinery industry
Product is required for carrying out offer power by hydraulic technique.Hydraulic power unit is the heart of hydraulic system, is hydraulic system
Power is provided.As the fueller in hydraulic system, hydraulic power unit be widely used in lifting mechanism, discharging vehicle,
In the mechanical equipments such as workbench, forcing press, lathe, it compared with conventional hydraulic station, have it is small, light-weight, energy saving can
The advantages that leaning on, be cheap.
Existing hydraulic power unit is generally assembled by motor, valve block component, gear pump and fuel tank, and valve block component connects
It is connected between gear pump and motor, fuel tank is connected on gear pump, and fuel sucking pipe and oil return pipe are respectively positioned in fuel tank and and gear
Pump connection, fuel sucking pipe are communicated with the oil inlet pipe in valve block component, and oil return pipe is communicated with the oil return line in valve block component, motor
Output shaft connect with gear pump across valve block component.When hydraulic power unit works, motor operation simultaneously passes through its output shaft band
Moving gear pump operation, under gear pumping action, the hydraulic oil in fuel tank is inhaled into the oil inlet pipe in valve block component through fuel sucking pipe
It in road, and eventually flows in the hydraulic power mechanism being connected with valve block component, when hydraulic power mechanism is stopped using, opens
Solenoid valve in valve block component, these flow to the hydraulic oil in hydraulic power mechanism again can be by the oil return line in valve block component
And the oil return pipe being connected on gear pump is flow back into fuel tank.The concrete structure of such hydraulic power unit can be found in Chinese patent
Number ZL201320712523.X, authorized announcement date are on May 28th, 2014, and invention and created name is：Hydraulic power unit it is special
Sharp application case.
Valve block component is the key that control element in hydraulic power unit, and playing pressure to hydraulic power unit adjusts and open
Close control action.The operation of existing valve block component mostly uses greatly the mode of operating lever push-and-pull to control fuel feeding and emptying, operating lever
It pushes and pulls valve core movement and realizes oil circuit switching, but the switching of this mode oil circuit was completed in moment, in handoff procedure, oil pressure moment
Increase causes driving mechanism starting-up action too fast, cannot achieve flow and pressure is adjusted, during actual use there is very big lack
It falls into；Such as in the fork truck using above-mentioned hydraulic power unit, fork truck lifting origination action is too fast, for carrying fork truck stability
In the presence of very big security risk.Also part valve block assembly increases flow regulating function regarding to the issue above, by valve block
On installed the devices such as relief valve, flow control valve additional so that hydraulic power unit is provided with flow regulating function.But this power
Unit is cumbersome in terms of hydraulic fluid flow rate adjusting, needs to control using solenoid valve, and when there is powerup issue, hydraulic pressure is dynamic
Power unit also just loses ability to work, to cause entire hydraulic system that can not work.And since it adds in valve block
All kinds of existing hydraulic pressure valve arrangements have been filled, have caused the valve block of hydraulic power unit complicated, not compact, installation is inconvenient.Such electricity
Magnet valve adjust hydraulic power unit can be found in China Patent No. 201010618399.1,201220386981.4,
201220413386.5,201520245863.5,201620961645.6 and 201721224618.1 etc. patent application cases.
For this reason, it is necessary to which the valve block structure to existing hydraulic power unit is improved, to solve existing hydraulic power list
The above problem existing for member.
Invention content
1. technical problems to be solved by the inivention
It is an object of the present invention to overcome existing hydraulic power unit valve block structure, there are complicated, hydraulic flows
The deficiencies of cumbersome is adjusted, a kind of hydraulic power unit valve block structure and hydraulic power unit, skill using the present invention are provided
Art scheme controls two groups of valve spools in valve block by the mandril that rotary extension moves, dexterously realizes fuel supply flow rate
Gradual change is adjusted, flow-rate adjustment simple and stable, and control oil return action can be rotated by mandril, all kinds of without being installed additional in valve block
Solenoid electric valve simplifies the structure of valve block, operates simpler convenience；It is additionally provided with relief valve in valve block simultaneously, ensure that
Equipment charge oil pressure safety and stability has extraordinary application value.
It is another object of the present invention to provide a kind of fork trucks using above-mentioned hydraulic power unit, by fork truck
On more smoothed out using above-mentioned hydraulic power unit, fork truck lifting action, operate simpler safety.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
A kind of hydraulic power unit valve block structure of the present invention, including valve body and the first spool bore in valve body,
Fuel feed hole, oil return hole, oil outlet and the regulating mechanism in the first spool bore, the regulating mechanism include the first regulating valve
Core, the first spool elastic component, valve core housing, the second adjusting spool, the second spool elastic component and mandril, the fuel feed hole and first
Spool bore is connected, and the mandril is installed in the jogger hole of valve body, and can by being rotated in stretching motion in jogger hole,
The jogger hole is communicated with the first spool bore, and has time for being connected to the first spool bore and oil return hole between mandril and jogger hole
Oily channel, first adjusting spool are installed in the first spool bore, and oil return is resisted under the action of the first spool elastic component
Channel, and drainback passage can be opened under mandril effect so that fuel feed hole and oil return hole communicate；The valve core housing is installed on
It offsets with the first spool elastic component in first spool bore, the second spool bore being connected with oil outlet is equipped in the valve core housing
And the through-hole of connection the first spool bore and the second spool bore, the tail portion of first adjusting spool pass through above-mentioned through-hole and set
It is matched in the second adjusting spool in the second spool bore, and is equipped with fuel feeding between the tail portion of the first adjusting spool and above-mentioned through-hole
Channel, second adjusting spool resist above-mentioned oil supply gallery under the action of the second spool elastic component, and can be with mandril
It moves down and opens oil supply gallery under the caudal action of the first adjusting spool so that the first spool bore and the second spool bore communicate.
Further, first adjusting spool includes adjusting steel ball and spool thimble, the spool thimble
One end is oriented in the through-hole of valve core housing, and the other end of spool thimble is abutted against with steel ball is adjusted, the adjusting steel ball and
Mandril matches.
Further, the spool thimble is equipped with expansion end with the matched one end of steel ball is adjusted, and expands end
End face is and adjusts the matched interior concave spherical surface of steel ball, the end face of the mandril is also and adjusts the matched indent of steel ball
Spherical surface, the spool thimble and the matched one end of the second adjusting spool are equipped with necking down head；The first spool elastic component
For spring, which is set on spool thimble, and spring one end is against on the front end face of valve core housing, and the other end is against spool thimble
Expansion end on.
Further, second adjusting spool is steel ball, and the second spool elastic component is spring, described
Second spool elastic component is blocked by sealing element in valve core housing；The end face of the necking down head is to match with the second adjusting spool
The interior concave spherical surface closed.
Further, the sealing element includes sealing steel ball and seal plug, and the sealing steel ball is by seal plug
Head is pressed in the second spool bore and blocks the second spool bore.
Further, it is additionally provided with the relief valve being connected with fuel feed hole on the valve body.
Further, the relief valve includes pressure release steel ball, pressure release spring, pressure adjusting plug and oil leak hole, institute
The pressure release steel ball and pressure release spring stated are adjusted by pressure in the relief valve core bore that plug is plugged on valve body, the oil leak hole
It is connected with relief valve core bore.
A kind of hydraulic power unit of the present invention, including valve block, motor, gear pump and fuel tank, the valve block are installed on
Between motor and gear pump, the output shaft of the motor is connected across valve block with gear pump, and the fuel tank is connected to tooth
On wheel pump, the valve block uses above-mentioned hydraulic power unit valve block structure, the mandril to be connected with control stick；It is described
Control stick at least there is fuel supply flow rate adjusting control area and hydraulic oil to flow back control zone, in fuel supply flow rate adjusting control area, behaviour
Vertical pole rotation retracts, and the first adjusting spool gradually closes drainback passage, the hydraulic oil come in fuel feed hole with pressure increase by
It is gradually that the second adjusting spool is open-top for equipment fuel feeding；In hydraulic oil reflux control zone, control stick rotation heads into, and mandril is adjusted first
Section spool is open-top while the first adjusting spool tail portion is open-top by the second adjusting spool, and hydraulic oil is flowed back by oil outlet through oil return hole
Into fuel tank.
Further, the motor switch of the motor is set on valve body, and the control stick is equipped with one and motor
Matched eccentric cam is switched, the keying of motor switch is rotated by eccentric cam to be controlled.
A kind of fork truck using above-mentioned hydraulic power unit of the present invention.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, there is following remarkable result：
(1) a kind of hydraulic power unit valve block structure of the invention is equipped in valve body and is capable of rotary extension movement
Mandril, mandril stretching motion control the on-off action of the first adjusting spool and the second adjusting spool, in Fuel injection system, mandril control
It makes the first adjusting spool to progressively close off, with being gradually increased for input pressure, the second adjusting spool is made to be gradually opened carry out fuel feeding,
To realize that fuel supply flow rate gradual change is adjusted；During oil return, mandril controls the first adjusting spool and the second adjusting spool simultaneously
It opens, realizes oil return action；Two groups of valve spools in valve block are controlled by the mandril that rotary extension moves, are dexterously realized
The gradual change of fuel supply flow rate is adjusted, flow-rate adjustment simple and stable, and control oil return action can be rotated by mandril, without in valve block
It is upper to install all kinds of solenoid electric valves additional, the structure of valve block is simplified, simpler convenience is operated；
(2) a kind of hydraulic power unit valve block structure of the invention, the first adjusting spool include adjusting steel ball and spool
One end of thimble, spool thimble is oriented in the through-hole of valve core housing, and the other end of spool thimble is abutted against with steel ball is adjusted, and is adjusted
Section steel ball is matched with mandril, is adjusted steel ball and is opened and closed convenient for oil circuit, and spool thimble is convenient for that adjusting steel ball and second is made to adjust
It saves spool and forms linkage effect, structure design is simply ingenious, is convenient for the processing and fabricating of the first adjusting spool, improves oil circuit control
Stability and accuracy；
(3) a kind of hydraulic power unit valve block structure of the invention, spool thimble and the matched one end of adjusting steel ball
Equipped with end is expanded, the end face for expanding end is and adjusts the matched interior concave spherical surface of steel ball, and the end face of mandril is also and adjusting
The matched interior concave spherical surface of steel ball, spool thimble and the matched one end of the second adjusting spool are equipped with necking down head, the end of necking down head
Face is to contribute to steel ball in spool bore using concave spherical surface and steel ball cooperation with the matched interior concave spherical surface of the second adjusting spool
Positioning, it is therefore prevented that steel ball deviates, and improves valve block and adjusts stability；Also, using the necking down header structure of spool thimble end, have
Effect prevents spool thimble type frequently reciprocating and causes to wear to the valve port of the second spool bore, further improves valve block flow
The stability of adjusting and the service life of valve block；
(4) a kind of hydraulic power unit valve block structure of the invention, the sealing element of the second spool include sealing steel ball and
Seal plug, sealing steel ball, which is pressed on by seal plug in the second spool bore, blocks the second spool bore, and sealing structure is simple,
Easy to assembly, sealing effect is good；
(5) a kind of hydraulic power unit valve block structure of the invention is additionally provided with letting out of being connected with fuel feed hole on valve body
Pressure valve, pressure valve includes pressure release steel ball, pressure release spring, pressure adjusts plug and oil leak hole, pressure release steel ball and pressure release spring pass through pressure
Power adjusts plug and is plugged in the relief valve core bore on valve body, and oil leak hole is connected with relief valve core bore；It ensure that equipment fuel feeding
Pressure security is stablized, and has extraordinary application value；
(6) a kind of hydraulic power unit of the invention applies above-mentioned valve block structure, and control stick, which at least has, to be supplied
Oil stream amount adjusting control area and hydraulic oil reflux control zone, in fuel supply flow rate adjusting control area, control stick rotation retracts, and first adjusts
Section spool gradually closes drainback passage, and the hydraulic oil come in fuel feed hole increases gradually that the second adjusting spool is open-top with pressure
For equipment fuel feeding；It flows back control zone in hydraulic oil, control stick rotation heads into, and mandril is open-top while first by the first adjusting spool
Adjusting spool tail portion is open-top by the second adjusting spool, and hydraulic oil is flowed back into through oil return hole in fuel tank by oil outlet；Flow-rate adjustment is steady
It is fixed reliable, it is simple to operate；
(7) a kind of fork truck of the invention, applies above-mentioned hydraulic power unit, above-mentioned by being used on fork truck
Hydraulic power unit, fork truck lifting action more smooth out, and operate simpler safety.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of hydraulic power unit of the present invention；
Fig. 2 is the directions the A-A schematic cross-sectional view of valve block in Fig. 1；
Fig. 3 is the partial enlargement structural representation at K in Fig. 2, the position of spool and oil when showing standby mode in figure
It moves towards on road；
Fig. 4 is the partial enlargement structural representation at K in Fig. 2, the position of spool and oil when showing oil condition in figure
It moves towards on road；
Fig. 5 is the partial enlargement structural representation at K in Fig. 2, the position of spool and oil when showing oil return state in figure
It moves towards on road；
Fig. 6 is a kind of cross-sectional view at B-B in Fig. 3.
Label declaration in schematic diagram：
1, valve block；1-1, valve body；1-2, the first spool bore；1-3, steel ball is adjusted；1-4, spool thimble；1-4a, bellend
Head；1-4b, necking down head；1-5, the first spool elastic component；1-6, valve core housing；1-7, the second adjusting spool；1-8, the second spool bullet
Property part；1-9, sealing steel ball；1-10, seal plug；1-11, oil connection；1-12, mandril；1-13, drainback passage；1-14, it returns
Oilhole；1-15, control stick；1-16, eccentric cam；1-17, motor switch；1-18, fuel feed hole；1-19, pressure release steel ball；1-20、
Pressure release spring；1-21, pressure adjust plug；1-22, oil leak hole；1-23, oil supply gallery；2, motor；3, gear pump；4, fuel tank.
Specific implementation mode
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
In conjunction with shown in Fig. 2 to Fig. 5, a kind of hydraulic power unit valve block structure of the present embodiment, including valve body 1-1 and
The first spool bore 1-2, fuel feed hole 1-18, oil return hole 1-14, oil outlet in valve body 1-1 and it is set to the first spool bore 1-2
Interior regulating mechanism, the regulating mechanism include the first adjusting spool, the first spool elastic component 1-5, valve core housing 1-6, the second adjusting
Spool 1-7, the second spool elastic component 1-8 and mandril 1-12, fuel feed hole 1-18 are connected with the first spool bore 1-2, mandril 1-12
It is installed in the jogger hole of valve body 1-1, and it is real that threaded connection can specifically can be used by being rotated in stretching motion in jogger hole
Mandril 1-12 spinning movements are now converted into stretching motion, jogger hole is communicated with the first spool bore 1-2, and mandril 1-12 and mandril
There is the drainback passage 1-13 of connection the first spool bore 1-2 and oil return hole 1-14, drainback passage 1-13 can pass through top between hole
Gap between bar 1-12 and jogger hole is constituted, and the aperture of the first spool bore 1-2 is more than the aperture of jogger hole, the first adjusting spool
It is installed in the first spool bore 1-2, drainback passage 1-13 is resisted under the action of the first spool elastic component 1-5, and can push up
Bar 1-12 effects are lower to open drainback passage 1-13 so that fuel feed hole 1-18 and oil return hole 1-14 are communicated；Valve core housing 1-6 is installed on
Offsets with the first spool elastic component 1-5 in one spool bore 1-2, valve core housing 1-6 can be used copper material and be made, valve core housing 1-6 and
It is tightly connected between valve core housing 1-6, the first valve of the second spool bore being connected with oil outlet and connection is equipped in valve core housing 1-6
The through-hole of core bore 1-2 and the second spool bore, the aperture of the second spool bore are more than the aperture of above-mentioned through-hole, the tail of the first adjusting spool
Portion passes through above-mentioned through-hole to be matched with the second adjusting spool 1-7 in the second spool bore, and the tail portion of the first adjusting spool
Oil supply gallery 1-23 is equipped between above-mentioned through-hole, oil supply gallery 1-23 also can be by between the first adjusting spool tail portion and through-hole
Gap constitute, the second adjusting spool 1-7 resists above-mentioned oil supply gallery 1-23 under the action of the second spool elastic component 1-8, and
It can be moved down with mandril 1-12 and open oil supply gallery 1-23 under the caudal action of the first adjusting spool so that the first spool bore 1-2
It is communicated with the second spool bore.Valve block structure using the above structure, in Fuel injection system, mandril 1-12 controls the first adjusting spool
It progressively closes off, with being gradually increased for input pressure, so that the second adjusting spool 1-7 is gradually opened carry out fuel feeding, to realize confession
Oil stream amount gradual change is adjusted；During oil return, mandril 1-12 controls the first adjusting spool and the second adjusting spool 1-7 is beaten simultaneously
It opens, realizes oil return action；Two groups of valve spools in valve block are controlled by the mandril 1-12 that rotary extension moves, are dexterously realized
The gradual change of fuel supply flow rate is adjusted, flow-rate adjustment simple and stable, and can be not necessarily to by mandril 1-12 rotation control oil return actions
It installs all kinds of solenoid electric valves additional in valve block, simplifies the structure of valve block, operate simpler convenience.
As shown in Figures 2 to 5, in the present embodiment, the first adjusting spool includes adjusting steel ball 1-3 and spool thimble 1-4,
One end of spool thimble 1-4 is oriented in the through-hole of valve core housing 1-6, the other end and the adjusting steel ball 1-3 phases of spool thimble 1-4
It abuts, adjusts steel ball 1-3 and matched with mandril 1-12.First adjusting spool uses above-mentioned split structure, adjusts steel ball 1-3 just
It is opened and closed in oil circuit, spool thimble 1-4 ties convenient for making adjusting steel ball 1-3 and the second adjusting spool 1-7 form linkage effect
Structure design is simple ingenious, is convenient for the processing and fabricating of the first adjusting spool, improves oil circuit control stability and accuracy.Specifically
Ground, spool thimble 1-4 are equipped with expansion end 1-4a with the matched one end steel ball 1-3 is adjusted, and the end face for expanding end 1-4a is
With adjust the matched interior concave spherical surfaces of steel ball 1-3, the end face of mandril 1-12 is also and adjusts the matched indent balls of steel ball 1-3
Face, spool thimble 1-4 and second matched one end adjusting spool 1-7 are equipped with necking down head 1-4b；First spool elastic component 1-5 is
Spring, the spring pocket are set on spool thimble 1-4, and spring one end is against on the front end face of valve core housing 1-6, and the other end is against spool
On the expansion end 1-4a of thimble 1-4.Second adjusting spool 1-7 is steel ball, and the second spool elastic component 1-8 is spring, the second valve
Core elastic component 1-8 is blocked by sealing element in valve core housing 1-6；The end face of necking down head 1-4b is and the second adjusting spool 1-7 phases
The interior concave spherical surface of cooperation.Being coordinated using concave spherical surface and steel ball, steel ball is contributed to be positioned in spool bore, it is therefore prevented that steel ball deviates,
It improves valve block and adjusts stability；Also, using the necking down header structure of the ends spool thimble 1-4, effectively prevent spool thimble
1-4 type frequently reciprocatings and the valve port of the second spool bore is caused to wear, further improve the stability of valve block flow-rate adjustment
With the service life of valve block.Above-mentioned sealing element includes sealing steel ball 1-9 and seal plug 1-10, and steel ball 1-9 is by sealing for sealing
Plug 1-10 is pressed in the second spool bore and blocks the second spool bore, and sealing structure is simple, easy to assembly, sealing effect
It is good.Hydraulic system is overloaded in order to prevent, the relief valve being connected with fuel feed hole 1-18 is additionally provided on valve body 1-1, such as Fig. 2 institutes
Show, which includes pressure release steel ball 1-19, pressure release spring 1-20, pressure adjusting plug 1-21 and oil leak hole 1-22, pressure release steel
Pearl 1-19 and pressure release spring 1-20 adjusts plug 1-21 by pressure and is plugged in the relief valve core bore on valve body 1-1, pressure tune
Section plug 1-21 can adjust the precompression size of pressure release spring 1-20, and oil leak hole 1-22 is connected with relief valve core bore, ensures
Equipment charge oil pressure safety and stability has extraordinary application value.
A kind of hydraulic power unit valve block structure of the present embodiment, as shown in figure 3, under motor standby mode, second adjusts
Section spool 1-7 closes through-hole under the action of the second spool elastic component 1-8, and mandril 1-12 will adjust the tops steel ball 1-3 at this time
It opens, the hydraulic oil entered by fuel feed hole 1-18 enters oil return hole 1-14 by drainback passage 1-13 and recycles；As shown in figure 4, flowing
It measures under adjustment state, mandril 1-12 rotations retract, and adjust steel ball 1-3 at this time and are moved together under the first spool elastic component 1-5 effects
The dynamic valve port for gradually turning down drainback passage 1-13, with being gradually reduced for drainback passage 1-13 valve ports, in the first spool bore 1-2
Pressure is gradually increased, and after pressure is more than the elastic force of the second spool elastic component 1-8, the second adjusting spool 1-7 is opened, by oil inlet
The hydraulic oil part that hole 1-18 enters enters oil return hole 1-14 cycles by drainback passage 1-13, partly passes through oil supply gallery 1-23
Into oil outlet fuel feeding, and the opening of the second adjusting spool 1-7 is determined according to the amount of mandril 1-12 rotation rollbacks, and is being adjusted
Section steel ball 1-3 reaches maximum stream flow after completely closing drainback passage 1-13, and the flow gradual change for realizing fuel feeding is adjusted；Such as Fig. 5 institutes
Show, under oil return state, mandril 1-12 rotations move down, and by adjusting, steel ball 1-3 is open-top, and mandril 1-12 continues rotation and moves down, and utilizes
Spool thimble 1-4 is open-top by the second adjusting spool 1-7 simultaneously, the oil outlet being connect at this time with oil connection 1-11 and oil return hole 1-
14 communicate, and the hydraulic oil in oil connection 1-11 flows back into oil return hole 1-14, complete reflux release work.In the present embodiment,
Since the through-hole guides on spool thimble 1-4 and valve core housing 1-6 coordinate, and there is oil supply gallery 1-23 between the two, for this purpose, being
It is easy to process, as shown in fig. 6, through-hole is processed as circle in the present embodiment, by the tail portion of spool thimble 1-4 and through-hole cooperation
Processing is square, and square four apex angles are oriented to through-hole wall to be coordinated, and the side wall of the two forms oil supply gallery 1-
23.Certainly, above-mentioned through-hole and the cross sectional shape of the tail portions spool thimble 1-4 are only a kind of embodiment, not office in the present invention
It is limited to this, such as the cross sectional shape of the tail portions spool thimble 1-4 is also designed to other polygonized structures, or by through-hole and spool
The tail portions thimble 1-4 can be oriented to using other and the structure type with channel.
Embodiment 2
In conjunction with shown in Fig. 1, a kind of hydraulic power unit of the present embodiment, including valve block 1, motor 2, gear pump 3 and fuel tank
4, valve block 1 is installed on using the hydraulic power unit valve block structure in embodiment 1, valve block 1 between motor 2 and gear pump 3, electricity
The output shaft of machine 2 is connected across valve block 1 with gear pump 3, and fuel tank 4 is connected on gear pump 3, the fuel feed hole 1-18 in valve block 1
It is connected with the oil inlet of gear pump 3, oil return hole 1-14 and oil leak hole 1-22 are connected to fuel tank 4, oil outlet and the oil in valve block 1
Pipe fitting 1-11 connections, for being connect with hydraulic test.Valve block 1 is equipped with control stick 1-15, mandril 1-12 and control stick 1-15
It is connected；Control stick 1-15 at least has fuel supply flow rate adjusting control area and hydraulic oil reflux control zone, referring to Fig. 3 to Fig. 5 institutes
Show, in fuel supply flow rate adjusting control area, control stick 1-15 rotations retract, and the first adjusting spool gradually closes drainback passage 1-13
It closes, the hydraulic oil come in fuel feed hole 1-18 increases gradually that the second adjusting spool 1-7 is open-top for equipment fuel feeding with pressure；In liquid
Pressure oil flows back control zone, and control stick 1-15 rotation heads into, and mandril 1-12 is by the first adjusting spool is open-top while the first adjusting spool
Tail portion is open-top by the second adjusting spool 1-7, and hydraulic oil is flowed back into through oil return hole 1-14 in fuel tank 4 by oil outlet.The present embodiment
A kind of hydraulic power unit, flow-rate adjustment is reliable and stable, simple to operate.
As shown in Fig. 2, for the ease of the control of hydraulic power unit, in the present embodiment, the motor switch 1-17 of motor 2
On valve body 1-1, control stick 1-15 is equipped with one and motor switch 1-17 matched eccentric cam 1-16, motor switch 1-
17 keying is by eccentric cam 1-16 rotation controls.In control stick 1-15 rotary courses, eccentric cam 1-16 can be according to top
The keying of position control motor switch 1-17s of the bar 1-12 in valve body 1-1, in 2 opening process of motor, control stick 1-15 rotations
Turning that eccentric cam 1-16 is made to trigger motor switch 1-17, motor 2 is started to work, and mandril 1-12 is in position shown in Fig. 3 at this time, if
Standby not fuel feeding, control stick 1-15 continue to rotate, and motor keeps work, mandril 1-12 to be in position shown in Fig. 4, and fuel supply flow rate has small
To big variation, fuel feeding is carried out for equipment, ensures that device action is reliable and stable；When needing emptying, control stick 1-15 is reversely rotated
It pushes, eccentric cam 1-16 is detached from motor switch 1-17, and motor 2 is closed, at this time the first adjusting spool and the second adjusting spool
1-7 is opened simultaneously, and carries out emptying, and the hydraulic oil in equipment returns in fuel tank 4.When there are overload situations in equipment, fuel feed hole 1-
Hydraulic fluid pressure in 18 overcomes the pressure of pressure release spring 1-20 to open pressure release steel ball 1-19, and hydraulic oil passes through oil leak hole 1-22
It returns in fuel tank 4.
Embodiment 3
Present embodiment discloses a kind of fork trucks using the hydraulic power unit described in above-described embodiment 2.By 2 institute of embodiment
The hydraulic power unit stated is applied and replaces existing hydraulic power unit in fork truck, and practice uses surface, fork truck starting lifting
Slow in one's movements, then speed is gradually increased, and lifting is steady reliable, and lifting speed can be cleverer by rotating control stick 1-15
Control living, fork truck lifting action more smooth out, and operate simpler safety.
A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application of the present invention, is stretched by rotation
Two groups of valve spools in the mandril control valve block of contracting movement, the gradual change for dexterously realizing fuel supply flow rate are adjusted, flow-rate adjustment
Simple and stable, and control oil return action can be rotated by mandril, without installing all kinds of solenoid electric valves additional in valve block, simplify
The structure of valve block operates simpler convenience；It is additionally provided with relief valve in valve block simultaneously, ensure that equipment charge oil pressure is steady safely
It is fixed, there is extraordinary application value.By using above-mentioned hydraulic power unit on fork truck, fork truck lifting action is more
Add smooth-going, operates simpler safety.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, without creatively designing and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (10)
1. a kind of hydraulic power unit valve block structure, including valve body (1-1) and the first spool bore in valve body (1-1)
(1-2), fuel feed hole (1-18), oil return hole (1-14), oil outlet and the regulating mechanism in the first spool bore (1-2), it is special
Sign is：
The regulating mechanism includes the first adjusting spool, the first spool elastic component (1-5), valve core housing (1-6), the second regulating valve
Core (1-7), the second spool elastic component (1-8) and mandril (1-12), the fuel feed hole (1-18) and the first spool bore (1-2) phase
Connection, the mandril (1-12) are installed in the jogger hole of valve body (1-1), and can be by being rotated in jogger hole fortune of stretching
Dynamic, the jogger hole is communicated with the first spool bore (1-2), and mandril (1-12) between jogger hole with being connected to the first spool
The drainback passage (1-13) in hole (1-2) and oil return hole (1-14), first adjusting spool are installed on the first spool bore (1-2)
It is interior, drainback passage (1-13) is resisted under the action of the first spool elastic component (1-5), and can be beaten under mandril (1-12) effect
Drainback passage (1-13) is opened so that fuel feed hole (1-18) and oil return hole (1-14) communicate；The valve core housing (1-6) is installed on
It offsets with the first spool elastic component (1-5) in one spool bore (1-2), is equipped in the valve core housing (1-6) and is connected with oil outlet
The through-hole of logical the second spool bore and the first spool bore of connection (1-2) and the second spool bore, first adjusting spool
Tail portion passes through above-mentioned through-hole to be matched with the second adjusting spool (1-7) in the second spool bore, and the first adjusting spool
Oil supply gallery (1-23) is equipped between tail portion and above-mentioned through-hole, second adjusting spool (1-7) is in the second spool elastic component
Above-mentioned oil supply gallery (1-23) is resisted under the action of (1-8), and the tail in the first adjusting spool can be moved down with mandril (1-12)
Portion's effect is lower to open oil supply gallery (1-23) so that the first spool bore (1-2) and the second spool bore communicate.
2. a kind of hydraulic power unit valve block structure according to claim 1, it is characterised in that：First regulating valve
Core includes adjusting steel ball (1-3) and spool thimble (1-4), and one end of the spool thimble (1-4), which is oriented to, is set to valve core housing (1-
6) in through-hole, the other end of spool thimble (1-4) is abutted against with steel ball (1-3) is adjusted, the adjusting steel ball (1-3) and top
Bar (1-12) matches.
3. a kind of hydraulic power unit valve block structure according to claim 2, it is characterised in that：The spool thimble
(1-4) with adjust the matched one end steel ball (1-3) be equipped with expand end (1-4a), expand end (1-4a) end face be and tune
Steel ball (1-3) matched interior concave spherical surface is saved, the end face of the mandril (1-12) is also matched with adjusting steel ball (1-3)
Interior concave spherical surface, the spool thimble (1-4) are equipped with necking down head (1-4b) with the matched one end the second adjusting spool (1-7)；
The first spool elastic component (1-5) is spring, which is set on spool thimble (1-4), and spring one end is against spool
On the front end face for covering (1-6), the other end is against on the expansion end (1-4a) of spool thimble (1-4).
4. a kind of hydraulic power unit valve block structure according to claim 3, it is characterised in that：Second regulating valve
Core (1-7) is steel ball, and the second spool elastic component (1-8) is spring, and the second spool elastic component (1-8) is by close
Sealing blocks in valve core housing (1-6)；The end face of the necking down head (1-4b) is matched with the second adjusting spool (1-7)
Interior concave spherical surface.
5. a kind of hydraulic power unit valve block structure according to claim 4, it is characterised in that：The sealing element includes
Sealing steel ball (1-9) and seal plug (1-10), the sealing steel ball (1-9) are pressed on the second valve by seal plug (1-10)
The second spool bore is blocked in core bore.
6. a kind of hydraulic power unit valve block structure according to claim 1 to 5 any one, it is characterised in that：It is described
Valve body (1-1) on be additionally provided with the relief valve being connected with fuel feed hole (1-18).
7. a kind of hydraulic power unit valve block structure according to claim 6, it is characterised in that：The relief valve includes
Pressure release steel ball (1-19), pressure release spring (1-20), pressure adjust plug (1-21) and oil leak hole (1-22), the pressure release steel ball
(1-19) and pressure release spring (1-20) adjust plug (1-21) by pressure and are plugged in the relief valve core bore on valve body (1-1),
The oil leak hole (1-22) is connected with relief valve core bore.
8. a kind of hydraulic power unit, including valve block (1), motor (2), gear pump (3) and fuel tank (4), the valve block (1) peace
Loaded between motor (2) and gear pump (3), the output shaft of the motor (2) is connected across valve block (1) with gear pump (3),
The fuel tank (4) is connected on gear pump (3), it is characterised in that：The valve block (1) is any one using claim 1 to 7
Hydraulic power unit valve block structure described in, the mandril (1-12) are connected with control stick (1-15)；The manipulation
Bar (1-15) at least has fuel supply flow rate adjusting control area and hydraulic oil reflux control zone, in fuel supply flow rate adjusting control area, behaviour
Vertical pole (1-15) rotation retracts, and the first adjusting spool gradually closes drainback passage (1-13), comes in fuel feed hole (1-18)
Hydraulic oil increases gradually that the second adjusting spool (1-7) is open-top for equipment fuel feeding with pressure；In hydraulic oil reflux control zone, manipulate
Bar (1-15) rotation heads into, and mandril (1-12) is open-top by the first adjusting spool while the first adjusting spool tail portion is adjusted second
Spool (1-7) is open-top, and hydraulic oil is flowed back into through oil return hole (1-14) in fuel tank (4) by oil outlet.
9. a kind of hydraulic power unit according to claim 8, it is characterised in that：The motor switch of the motor (2)
(1-17) is set on valve body (1-1), and the control stick (1-15) is equipped with one and motor switch (1-17) matched bias
Cam (1-16), the keying of motor switch (1-17) is rotated by eccentric cam (1-16) to be controlled.
10. a kind of fork truck using the hydraulic power unit described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926302.XA CN108679028A (en) | 2018-08-15 | 2018-08-15 | A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926302.XA CN108679028A (en) | 2018-08-15 | 2018-08-15 | A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108679028A true CN108679028A (en) | 2018-10-19 |
Family
ID=63815536
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810926302.XA Pending CN108679028A (en) | 2018-08-15 | 2018-08-15 | A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application |
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| CN (1) | CN108679028A (en) |
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| CN110131515A (en) * | 2019-06-21 | 2019-08-16 | 太仓阳净环保科技有限公司 | The miscellaneous fluid of heat continuously flows pressure duct pressure maintaining method and device |
| CN110228774A (en) * | 2019-05-08 | 2019-09-13 | 杭叉集团股份有限公司 | A kind of fork truck and forklift door frame hydraulic system for lifting |
| CN110255422A (en) * | 2019-06-12 | 2019-09-20 | 安徽通润汽车零部件有限公司 | A kind of oil return apparatus at a slow speed for jack |
| CN110683484A (en) * | 2019-10-12 | 2020-01-14 | 武芳 | Vibration damper for telescopic arm forklift |
| CN112060670A (en) * | 2020-08-13 | 2020-12-11 | 邵玉刚 | Flow and pressure control device of hydraulic machine |
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| CN110228774A (en) * | 2019-05-08 | 2019-09-13 | 杭叉集团股份有限公司 | A kind of fork truck and forklift door frame hydraulic system for lifting |
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