CN202327056U - Proportional pressure regulation control system for automatic gearbox of forklift - Google Patents
Proportional pressure regulation control system for automatic gearbox of forklift Download PDFInfo
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- CN202327056U CN202327056U CN2011204424777U CN201120442477U CN202327056U CN 202327056 U CN202327056 U CN 202327056U CN 2011204424777 U CN2011204424777 U CN 2011204424777U CN 201120442477 U CN201120442477 U CN 201120442477U CN 202327056 U CN202327056 U CN 202327056U
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Abstract
The utility model relates to a proportional pressure regulation control system for an automatic gearbox of a forklift. The system comprises a pilot valve, a proportional pressure reducing valve, an emergency reversing valve, a reversing valve, a two-position four-way linkage valve, a retreating emergency reversing valve and an advancing emergency reversing valve, wherein the pilot valve is a two-position three-way solenoid valve; the emergency reversing valve is a three-position four-way manual reversing valve; the reversing valve is a three-position four-way solenoid valve; and each of the retreating emergency reversing valve and the advancing emergency reversing valve is a two-position three-way control valve. A pressure regulation valve, a cushion valve and an inching valve are eliminated, so that the cost and failure rate of the product are decreased; the proportional pressure reducing valve, the reversing valve and the two-position four-way linkage valve are rationally matched, so that the control system has high anti-jamming capability and high reliability; an adjustable throttling valve is additionally arranged, so that the whole hydraulic system has a high back pressure cushioning function to avoid gear shifting impact; and an emergency function is added, so that the safe and reliable control function of the whole forklift is realized by manually operating the emergency reversing valve under the condition of breakdown of the control system.
Description
Technical field
The utility model belongs to the self shifter control technique field of carrying vehicle, is specifically related to gearshift is realized the hydraulic system of control automatically.
Background technique
At present, domestic fork truck transmission system adopts hydraudynamic drive more, and mostly its gearshift is the integrated electric hydraulic control valve with reversing gear, and adopting fluid clutch simultaneously is gearshift actuator.The most speed Control that adopt the switch type on-off control valve to carry out fork truck of change control system; Part automatic gear shifting speed changing system also has direct employing switch valve to carry out gear shift control; Simultaneously, switch valve also all has application in industries such as engineering machinery, automobile, manufacturing.Because it has many advantages such as cheap, insensitive to polluting, that antijamming capability is strong, makes it in the fork truck transmission system, be widely used for many years.
Yet the control accuracy of this integrated electric hydraulic control valve is relatively poor, and pilot pressure can not the realization ratio be regulated, in the shift process; Can only realize switch control to the variation in pressure in the oil circuit; Therefore the big young pathbreaker of fluid clutch institute carry-over moment presses the step type variation, can cause the shift impact that vehicle is serious like this, and strong shift impact can make shorten the working life of transmission part; The reliability of car load reduces; Can influence driver and passenger's riding comfort simultaneously, for the carrying vehicle of, work under bad environment frequent for gearshift, the improvement of transmission system shift quality seems more important.
Summary of the invention
Give performance, the working life of driving component and the influence that comfort of drivers and passengers is brought of fork truck in order to solve shift impact; Simultaneously; Be shift quality that improves the fork truck gearbox and the working life of improving driving component, the utility model provides a kind of ratio voltage control system that is used for the fork truck automatic transmission case.
Concrete improvement technological scheme is following:
The ratio voltage control system that is used for the fork truck automatic transmission case comprises pilot valve 1, proportional pressure-reducing valve 8 and emergent selector valve 6, and pilot valve 1 is the two-bit triplet solenoid valve, and emergent selector valve 6 is the 3-position 4-way hand-operated direction valve; Wherein emergent oil inlet P 6 parallel connections of the ratio oil inlet P 8 of guide's oil inlet P 1 of pilot valve 1, proportional pressure-reducing valve 8 and emergent selector valve 6, the emergent switching filler opening T6 of guide's oil return inlet T 1 of pilot valve 1, the ratio oil return inlet T 8 of proportional pressure-reducing valve 8 and emergent selector valve 6 all is being communicated with fuel tank;
The ratio actuator port A8 of proportional pressure-reducing valve 8 is being communicated with the switching-over oil inlet P 7 of selector valve 7, and said selector valve 7 is a three position four-way electromagnetic valve; The switching-over actuator port A7 that retreats of selector valve 7 is being communicated with retreating oil inlet P 21 and advancing oil inlet P 22 of two four-way interstage valves 2 respectively with the switching-over actuator port B7 that advances; The slow astern of said two four-way interstage valves 2 retaining actuator port A21 is being communicated with and retreats retreating of emergent switching valve 3 and switch oil inlet P 31; The retaining actuator port A22 that advances of two four-way interstage valves 2 is being communicated with advancing of the emergent switching valve 4 that advances and is switching oil inlet P 41; Also be provided with on two four-way interstage valves 2 and retreat the two retaining actuator port B21 and the two retaining actuator port B22 that advance; Two four-way interstage valves 2 retreat oil return inlet T 21 and oil return inlet T 22 parallel connections of advancing after be communicated with fuel tank, the said parallel connected end of retreating the oil return inlet T 21 and the oil return inlet T 22 of advancing is provided with adjustable throttle valve 5; Saidly retreat emergent switching valve 3 and be the two-bit triplet control valve, retreat the emergent oil inlet P 32 of switching of retreating of emergent switching valve 3 and be communicated with retreating emergency operation hydraulic fluid port A6 and advancing emergency operation hydraulic fluid port B6 of emergent selector valve 6 respectively with the emergent oil inlet P 42 of switching of advancing of the emergent switching valve 4 that advances with the emergent switching valve 4 that advances.
Said proportional pressure-reducing valve 8 models are TS98-P324.
Said throttle valve 5 throttle orifice apertures are 0.8～1.2 ㎜.
The utility model designs on the basis of former control system again; Increase electro-hydraulic proportional control system, high back pressure pooling feature and emergency function, newly-increased electro-hydraulic proportional system has characteristics such as antijamming capability is strong, reliability is high, compact structure, price is low, control is flexible, low-speed stability is good; Cancel pressure regulator valve, trimmer valve and inching valve, reduced the manufacturing procedure of valve body, reduced the cost and the rate of fault of product.The high back pressure pooling feature makes the overlap joint time sequence control of shifting gears between adjacent two retainings more accurate.Emergency function can carry out the operation and the operation of manually interim maneuver vehicle under the situation that automatic speed-changing system lost efficacy, avoided the phenomenon that under the situation of control system paralysis, car load can't be worked.Newly-designed control valve has improved the working life of the shift quality and the driving component of gearbox, and has improved the reliability of car load greatly, has also improved the combination property and the market competitiveness of car load simultaneously.
The utility model is compared with the control system of prior art products, has the following advantages:
(1) the utility model is a kind of brand-new fork truck self shifter ratio voltage control system; Compare with original system; Cancel pressure regulator valve, trimmer valve and inching valve, made the structure of valve body compact more, reduced the manufacturing procedure of valve body; Installation and maintenance are convenient, reduced the cost and the rate of fault of product.The rational Match of Proportional valve that increases newly and selector valve and two four-way interstage valves makes control system have characteristics such as stronger antijamming capability, reliability is high, control is flexible;
(2) the adjustable throttle valve that in the oil circuit of clutch, increases; Make whole hydraulic system have the high back pressure pooling feature; What throttling buffering and ratio were regulated jointly controls, and makes the overlap joint time sequence control of shifting gears between adjacent two retainings more accurate, and has prevented that the shift process medium power from interrupting; Avoid shift impact, improved the shift quality of gearbox, the working life of driving component and the reliability of car load;
(3) emergency function that increases newly has solved under the situation of control system paralysis, and work inconvenience and unsafe problems that car load can't go and bring through the emergent selector valve of manual control, make the control function of car load more safe and reliable.
Description of drawings
Fig. 1 is the utility model structural representation.
Sequence number among the last figure: pilot valve 1, guide's oil inlet P 1, guide's oil return inlet T 1, guide's actuator port A1, two four-way interstage valves 2, retreat oil inlet P 21, slow astern retaining actuator port A21, retreat oil return inlet T 21, retreat two retaining actuator port B21, the oil inlet P of advancing 22, a retaining actuator port A22 advances; The oil return inlet T 22 of advancing, the two retaining actuator port B22 that advance, retreat emergent switching valve 3, retreat switch oil inlet P 31, retreat emergently switch oil inlet P 32, retreat switch operating hydraulic fluid port A3, the emergent switching valve 4 that advances, advance switch oil inlet P 41, advance emergently switch oil inlet P 42, the switch operating hydraulic fluid port A4 that advances, adjustable throttle valve 5, emergent selector valve 6, emergent oil inlet P 6, retreat emergency operation hydraulic fluid port A6, emergently switch filler opening T6, the emergency operation of advancing hydraulic fluid port B6, selector valve 7, switching-over oil inlet P 7, retreat switching-over actuator port A7, switching-over oil return inlet T 7, switching-over actuator port B7, proportional pressure-reducing valve 8, ratio oil inlet P 8, ratio oil return inlet T 8, ratio actuator port A8 advance.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done to describe further.
Referring to Fig. 1, the ratio voltage control system that is used for the fork truck automatic transmission case comprises pilot valve 1, proportional pressure-reducing valve 8 and emergent selector valve 6, and pilot valve 1 is the two-bit triplet solenoid valve, and emergent selector valve 6 is the 3-position 4-way hand-operated direction valve; The model of proportional pressure-reducing valve 8 is TS98-P324.Wherein be communicated with working connection after emergent oil inlet P 6 parallel connections of the ratio oil inlet P 8 of guide's oil inlet P 1 of pilot valve 1, proportional pressure-reducing valve 8 and emergent selector valve 6, the emergent switching filler opening T6 of guide's oil return inlet T 1 of pilot valve 1, the ratio oil return inlet T 8 of proportional pressure-reducing valve 8 and emergent selector valve 6 all is being communicated with fuel tank.
The ratio actuator port A8 of proportional pressure-reducing valve 8 is being communicated with the switching-over oil inlet P 7 of selector valve 7, and selector valve 7 is a three-position four-way valve.The switching-over actuator port A7 that retreats of selector valve 7 is being communicated with retreating oil inlet P 21 and advancing oil inlet P 22 of two four-way interstage valves 2 respectively with the switching-over actuator port B7 that advances; The slow astern of two four-way interstage valves 2 retaining actuator port A21 is being communicated with and retreats retreating of emergent switching valve 3 and switch oil inlet P 31; The retaining actuator port A22 that advances of two four-way interstage valves 2 is being communicated with advancing of the emergent switching valve 4 that advances and is switching oil inlet P 41; Also be provided with on two four-way interstage valves 2 and retreat the two retaining actuator port B21 and the two retaining actuator port B22 that advance; Retreat to be connected respectively when two retaining actuator port B21 use with the two retaining actuator port B22 that advance and retreat the two retaining clutches and the two retaining clutches that advance; Two four-way interstage valves 2 retreat oil return inlet T 21 and oil return inlet T 22 parallel connections of advancing after be communicated with fuel tank; The parallel connected end of retreating the oil return inlet T 21 and the oil return inlet T 22 of advancing of two four-way interstage valves 2 is provided with adjustable throttle valve 5, and the throttle orifice aperture of adjustable throttle valve 5 can be regulated between 0.8-1.2 ㎜.Retreat emergent switching valve 3 and be the two-bit triplet control valve, retreat the emergent oil inlet P 32 of switching of retreating of emergent switching valve 3 and be communicated with retreating emergency operation hydraulic fluid port A6 and advancing emergency operation hydraulic fluid port B6 of emergent selector valve 6 respectively with the emergent oil inlet P 42 of switching of advancing of the emergent switching valve 4 that advances with the emergent switching valve 4 that advances; The switch operating hydraulic fluid port A4 that advances that retreats the switch operating hydraulic fluid port A3 and the emergent switching valve 4 that advances that retreats emergent switching valve 3 is connected the slow astern retaining clutch and the retaining clutch that advances respectively.
Below in conjunction with Fig. 1, the working principle of the utility model is elaborated:
At first, system pressure oil is three the tunnel in node a punishment: the first via is used to control two four-way interstage valves 2 through the pilot valve 1 of two-position three way.The second the tunnel through emergent selector valve 6 entering emergency controls.Third Road gets into proportional pressure-reducing valve 8, regulates its pressure by proportional pressure-reducing valve 8 and changes by predefined rule.Ratio oil inlet P 8 is connected with ratio actuator port A8 during work, and pressure oil gets into the switching-over oil inlet P 7 of three position four-way directional control valve 7 subsequently, and this moment, system can be divided into following several kinds of working staties:
(1), neutral state; Three position four-way directional control valve 7 is in the meta state, retreats switching-over actuator port A7, the switching-over actuator port B7 that advances connects oil returns with switching-over oil return inlet T 7, at this moment; Pilot valve 1 is in the dead electricity off state; Guide's actuator port A1 and guide's oil return inlet T 1 are connected oil return, all do not have pressure oil to get in four clutches of gearbox, and vehicle is in the neutral state does not have power output.
(2), the forward gear operating mode is divided into advance a retaining and the two retaining operating modes of advancing: the retaining operating mode of 1) advancing; The electromagnetic coil SF of selector valve 7 gets; Make it be in right position conducting; Make the switching-over oil inlet P 7 and the switching-over actuator port B7 that advances connect oil-feed, retreat switching-over actuator port A7 and connect oil return with switching-over oil return inlet T 7; Pilot valve 1 is in the dead electricity off state; Two four-way interstage valves 2 are operated in right position on state; Pressure oil gets into advancing of the emergent switching valve 4 that advances by the oil inlet P 22 of advancing of switching-over actuator port B7 through two four-way interstage valves 2 of advancing with the retaining actuator port A22 that advances and switches oil inlet P 41; The emergent switching valve 4 that advances this moment is in position, left side on state under the effect of spring force; Advance and switch the oil inlet P 41 and the switch operating hydraulic fluid port A4 connection of advancing; Final pressure oil is by the retaining clutch that advances of the switch operating hydraulic fluid port A4 entering gearbox that advances, and vehicle is kept off a car by one, and speed is moved and power output.2) advance two the retaining operating modes; Selector valve 7 still is in right position on state, and pilot valve 1 gets electric position, the left side on state that is in, and guide's oil inlet P 1 is connected with guide's actuator port A1; Pilot pressure oil makes two four-way interstage valves 2 be in position, left side on state; The oil inlet P 22 of advancing this moment is connected with the two retaining actuator port B22 that advance, and final pressure oil directly gets into the two retaining clutches that advance of gearbox through the two retaining actuator port B22 that advance, and vehicle is exported with power by the two speed operations of keeping off a car.
(3), retreating the retaining operating mode is divided into the slow astern retaining and retreats two retaining operating modes: 1) slow astern retaining operating mode; The electromagnetic coil SR of selector valve 7 gets the electric left side position conducting that is in; Make switching-over oil inlet P 7 and retreat switching-over actuator port A7 connection oil-feed; The switching-over actuator port B7 that advances connects oil return with switching-over oil return inlet T 7; Pilot valve 1 is in the dead electricity off state, and two four-way interstage valves 2 are operated in right position on state, and pressure oil gets into slow astern retaining actuator port A21 and retreats emergent switching valve 3 by retreating the oil inlet P 21 of retreating of switching-over actuator port A7 through two four-way interstage valves 2; Retreat emergent switching valve 3 this moment and under the effect of spring force, be in left side position conducting; Retreat and switch oil inlet P 31 and retreat switch operating hydraulic fluid port A3 connection, final pressure oil is through retreating the slow astern retaining clutch that switch operating hydraulic fluid port A3 gets into gearbox, and vehicle is kept off a car by one, and speed is moved and power is exported.2) retreat two retaining situation; Selector valve 7 still is in position, left side on state, and pilot valve 1 gets electric position, the left side on state that is in, and guide's oil inlet P 1 is connected with guide's actuator port A1; Pilot pressure oil makes two four-way interstage valves 2 be in position, left side on state; Retreat oil inlet P 21 this moment and retreat two retaining actuator port B21 and connect, final pressure oil is through retreating the two retaining clutches of retreating that two retaining actuator port B21 directly get into gearbox, and vehicle is exported with power by the two speed operations of keeping off a car.
(4), the automatic speed changing operating mode, control valve is except that emergent selector valve 6 and selector valve 7 among Fig. 1, all the other control valves are controlled its on off operating mode by the variation of automatic shift control device according to car load speed and engine throttle opening two parameters by the self shifter rule.When car load goes up and down retaining by proportional pressure-reducing valve 8; Regulate the Changing Pattern of oil circuit pressure, clutch smooth and steady is combined, cause the power interruption of moment for the separation that prevents a certain retaining clutch; In the oil circuit of clutch, increase adjustable throttle valve 5; Its effect is to delay the disengaging time of the clutch of separation soon, the clutch that will combine is had ample time realize the moment switching, avoids shift impact to improve shift quality.
(5), emergency function, retreat emergent switching valve 3, the emergent selector valve 6 of advance emergent switching valve 4 and 3-position 4-way, its major function is under the situation of control system paralysis, to switch to manual control gearshift pattern.According to the working state of emergent selector valve 6, emergency function has following several kinds of operating modes: 1) neutral state, and this moment, emergency function was inoperative, was the automatic speed changing operating mode; 2) the emergent operating mode of a retaining of advancing; This moment, emergent selector valve 6 was in right position on state; Emergent oil inlet P 6 is connected with the emergency operation hydraulic fluid port B6 that advances, and pressure oil gets into the emergent switching valve 4 that advances through the emergency operation hydraulic fluid port B6 that advances, and guide's oil pressure makes it be in right position on state; The emergent oil inlet P 42 of switching of advancing this moment is connected with the switch operating hydraulic fluid port A4 that advances, and final pressure oil gets into the retaining clutch that advances can carry out emergent temporarily operation; 3) the emergent operating mode of slow astern retaining; This moment, emergent selector valve 6 was in position, left side on state; Emergent oil inlet P 6 is connected with retreating emergency operation hydraulic fluid port A6, and pressure oil is retreated emergent switching valve 3 through retreating emergency operation hydraulic fluid port A6 entering, and guide's oil pressure makes it be in right position on state; Retreat the emergent oil inlet P 32 of switching this moment and connect with retreating switch operating hydraulic fluid port A3, final pressure oil gets into slow astern retaining clutch can carry out emergent temporarily operation.When using emergency valve, must cut off controller power source, prevent manually and automatic function is moved to gearbox simultaneously and brought damage.
Claims (3)
1. the ratio voltage control system that is used for the fork truck automatic transmission case; It is characterized in that: comprise pilot valve (1), proportional pressure-reducing valve (8) and emergent selector valve (6); Pilot valve (1) is the two-bit triplet solenoid valve, and emergent selector valve (6) is the 3-position 4-way hand-operated direction valve; Wherein emergent filler opening (P6) parallel connection of the ratio filler opening (P8) of guide's filler opening (P1) of pilot valve (1), proportional pressure-reducing valve (8) and emergent selector valve (6), the emergent switching filler opening (T6) of guide's return opening (T1) of pilot valve (1), the ratio return opening (T8) of proportional pressure-reducing valve (8) and emergent selector valve (6) all is being communicated with fuel tank;
The ratio actuator port (A8) of proportional pressure-reducing valve (8) is being communicated with the switching-over filler opening (P7) of selector valve (7), and said selector valve (7) is a three position four-way electromagnetic valve; Selector valve (7) retreat switching-over actuator port (A7) with advance commutate that actuator port (B7) is being communicated with two four-way interstage valves (2) respectively retreat filler opening (P21) and the filler opening that advances (P22); The slow astern of said two four-way interstage valves (2) retaining actuator port (A21) is being communicated with to be retreated retreating of emergent switching valve (3) and switches filler opening (P31); The retaining actuator port (A22) that advances of two four-way interstage valves (2) is being communicated with advancing of the emergent switching valve (4) that advances and is switching filler opening (P41); Also be provided with on two four-way interstage valves (2) and retreat two retaining actuator ports (B21) and advance two retaining actuator ports (B22); Two four-way interstage valves (2) retreat return opening (T21) and the return opening that advances (T22) parallel connection after be communicated with fuel tank, the said parallel connected end of retreating return opening (T21) and the return opening that advances (T22) is provided with adjustable throttle valve (5); Saidly retreat emergent switching valve (3) and the emergent switching valve (4) that advances is the two-bit triplet control valve, that retreats that the emergent emergent switching filler opening (P42) that advances that switches the filler opening (P32) and the emergent switching valve (4) that advances of retreating of emergent switching valve (3) is being communicated with emergent selector valve (6) respectively retreats emergency operation hydraulic fluid port (A6) and the emergency operation hydraulic fluid port (B6) that advances.
2. the ratio voltage control system that is used for the fork truck automatic transmission case according to claim 1 is characterized in that: said proportional pressure-reducing valve (8) model is TS98-P324.
3. the ratio voltage control system that is used for the fork truck automatic transmission case according to claim 1 is characterized in that: said throttle valve (5) throttle orifice aperture is 0.8～1.2 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204424777U CN202327056U (en) | 2011-11-10 | 2011-11-10 | Proportional pressure regulation control system for automatic gearbox of forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204424777U CN202327056U (en) | 2011-11-10 | 2011-11-10 | Proportional pressure regulation control system for automatic gearbox of forklift |
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| Publication Number | Publication Date |
|---|---|
| CN202327056U true CN202327056U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204424777U Expired - Lifetime CN202327056U (en) | 2011-11-10 | 2011-11-10 | Proportional pressure regulation control system for automatic gearbox of forklift |
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| CN (1) | CN202327056U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359586A (en) * | 2011-11-10 | 2012-02-22 | 安徽合力股份有限公司 | Proportional voltage regulation control system for automatic gearbox of forklift truck |
| CN103344429A (en) * | 2013-07-24 | 2013-10-09 | 合肥协力仪表控制技术股份有限公司 | Numerical control test table for magnetic valve for forklift |
-
2011
- 2011-11-10 CN CN2011204424777U patent/CN202327056U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359586A (en) * | 2011-11-10 | 2012-02-22 | 安徽合力股份有限公司 | Proportional voltage regulation control system for automatic gearbox of forklift truck |
| CN102359586B (en) * | 2011-11-10 | 2013-11-27 | 安徽合力股份有限公司 | Proportional voltage regulation control system for automatic gearbox of forklift truck |
| CN103344429A (en) * | 2013-07-24 | 2013-10-09 | 合肥协力仪表控制技术股份有限公司 | Numerical control test table for magnetic valve for forklift |
| CN103344429B (en) * | 2013-07-24 | 2015-09-23 | 合肥协力仪表控制技术股份有限公司 | Numerical control test table for magnetic valve for forklift |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20131127 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20131127 |
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| RGAV | Abandon patent right to avoid regrant |