CN105889574A - Operating valve for double-pull rod type gearbox with cutting function - Google Patents
Operating valve for double-pull rod type gearbox with cutting function Download PDFInfo
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- CN105889574A CN105889574A CN201610409679.9A CN201610409679A CN105889574A CN 105889574 A CN105889574 A CN 105889574A CN 201610409679 A CN201610409679 A CN 201610409679A CN 105889574 A CN105889574 A CN 105889574A
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- valve body
- valve
- shift valve
- valve rod
- gear
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Classifications
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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
- F16K11/20—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 separate actuating members
- F16K11/22—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 separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
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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
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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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
- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/308—Modular hydraulic shift units, i.e. preassembled actuator units for select and shift movements adapted for being mounted on transmission casing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to an operating valve for a double-pull rod type gearbox with a cutting function. The operating valve comprises a valve body which is integrated with a direction shift valve, a gear shift valve and a rapid cut-off valve and forms the operating valve for the gearbox; the direction shift valve capable of sliding in the valve body is inserted in the valve body, one end part of the direction shift valve is encapsulated in the valve body, and the other end part extends out of the valve body; on the inner side of the valve body, a first sealing bracket is arranged on the direction shift valve in a sleeving manner; a first sealing ring is arranged in an inner groove of the first sealing bracket in a sleeving manner and is in contact with the direction shift valve; a second sealing ring is arranged in an outer groove of the first sealing bracket in a sleeving manner and is in contact with the valve body; a first skeleton oil seal is arranged on the outer side of the first sealing bracket; a first retaining ring is arranged on the outer side of the first skeleton oil seal and is clamped on the valve body; the first sealing bracket, the first sealing ring, the second sealing ring, the first skeleton oil seal and the first retaining ring jointly realize a sealing structure of the direction shift valve. The operating valve provided by the invention has the characteristics of being convenient to manufacture, low in cost, compact in structure, wide in range of application, good in universality and the like.
Description
Technical field
The construction machinery gear box machine hydraulic control system that the present invention relates to a kind of dual-pulling rod type band cutting function handles valve, and the hydraulic shift steerable system of valve block, especially Powershift transmission handled by the change speed gear box belonging to hydraulic drive field.
Background technology
The gear shift of engineering machinery Powershift transmission is mainly realized with disconnecting by the combination of wet friction clutch, different gears are then combined in order by different clutches, for realizing this process, it is desirable to have the hydraulic system of the Hydraulic Elements such as a cuff pressure valve, gear valve, trimmer valve realizes.For ease of install, reduce volume, simplify connecting line, generally by all or wherein section hydraulic valve be integrated on a valve body, make a manipulation valve block.Then existing manipulation valve can realize different gears, i.e. electrichydraulic control by the combination of electromagnetic valve by electromagnetic switch valve as pilot control gear spool.But electrichydraulic control is relatively costly, the most inapplicable in the special occasion having a requirement of explosion proof, it is therefore desirable to have the manipulation valve manually drawing valve rod, i.e. machine hydraulic control system.The most existing realize before 2 the 2 machine hydraulic control valves falling 1 neutral gear function, be to be controlled by two valve rods, and each gear has two set clutch oil-feeds, it is impossible to realize controlling each gears by two valve rods and only have a set of clutch to enter oil condition.Before controlling to realize 2 by valve rod, 2 fall 1 neutral gear, and the function of every grade of only a set of clutch oil-feed, but these are different from original operating habit, can bring certain trouble.
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, and a kind of compact conformation is provided, reliability is higher, cost is relatively low, possesses fast shut-off function, before realizing 2 by controlling two valve rods, 2 fall 1 neutral gear function, and the change speed gear box manipulation valve of every grade of only dual-pulling rod type band cutting function of a set of clutch oil-feed.
It is an object of the invention to complete by following technical solution, band cutting function duplex pull rod change speed gear box is with handling valve, and it includes that one is integrated with direction shift valve, speed shift valve, repid cut-off valve and constitutes the valve body of a change speed gear box manipulation valve.
Described valve body is inserted into the direction gear shift valve rod that can slide in valve body, and the one end of described direction gear shift valve rod is encapsulated in valve body, and the other end is stretched out outside valve body；Inner side at valve body, one first sealed support is enclosed within direction gear shift valve rod, first sealing ring is enclosed within the first sealed support inside groove and direction gear shift valve stem contacts, second sealing ring is enclosed within the first sealed support water jacket and valve body contact, one first outside framework oil seal is outside the first sealed support, one first ring washer is outside the first outside framework oil seal and is stuck on valve body, and the first sealed support, the first sealing ring, the second sealing ring, the first outside framework oil seal and the first ring washer achieve the sealing structure of direction shift valve jointly.
In described valve body, one first spring one end is pressed on the first steel ball, first steel ball is pressed on direction gear shift valve rod, the other end of the first spring is pressed on the first plug screw, told the first spring, the first steel ball is encapsulated in valve body by the first plug screw and the first sealing gasket, jointly plays the position-limiting action of direction gearshift procedure.
Described valve body is inserted into the fast shut-off spool that can slide in valve body, and described fast shut-off spool and direction gear shift valve rod are in the same centre bore of valve body, and fast shut-off spool and direction gear shift valve rod are separated in being inserted in valve body by a locking plate；One cuts off valve spring one end is pressed on fast shut-off spool end face, and the stop valve spring other end is pressed on locking plate；The other end of fast shut-off spool is encapsulated in valve body by plug and the second ring washer, and one the 3rd sealing ring is enclosed within plug, and one the 4th sealing ring is enclosed within fast shut-off spool, plays seal pressure oil effect.
Described valve body is inserted into the speed shift valve rod that can slide in valve body, and the one end of described speed shift valve rod is encapsulated in valve body, and the other end is stretched out outside valve body.Inner side at valve body, one second sealed support is enclosed within gear shift gear shift valve rod, 5th sealing ring is enclosed within the second sealed support inside groove and speed shift valve stem contacts, 6th sealing ring is enclosed within the second sealed support water jacket and valve body contact, one second outside framework oil seal is outside the second sealed support, one third gear circle is outside the second outside framework oil seal and is stuck on valve body, and the second sealed support, the 5th sealing ring, the 6th sealing ring, the second outside framework oil seal and third gear circle achieve the sealing structure of speed shift valve jointly.
In described valve body, one second spring one end is pressed on the second steel ball, second steel ball is pressed on speed shift valve rod, the other end of the second spring is pressed on the second plug screw, told the second spring, the second steel ball is encapsulated in valve body by the second plug screw and the second sealing gasket, jointly plays the position-limiting action of speed shift process.
The one end of described speed shift valve rod is encapsulated in valve body by the 3rd plug screw and the 3rd sealing gasket, and described speed shift valve rod and direction gear shift valve rod are arranged in parallel in valve body；Four clutch pressure tap are encapsulated in valve body by the 4th plug screw and the 4th sealing gasket, the 5th plug screw and the 5th sealing gasket, the 6th plug screw and the 6th sealing gasket, the 7th plug screw and the 7th sealing gasket, four pressure tap and the second plug screw are on same centrage, and side arranges that three opposite sides arrange one.
All having oil groove on described valve body, direction gear shift valve rod, speed shift valve rod, fast shut-off spool, oil groove includes pressure port and oil return opening；Described direction shift valve includes main pressure port, pressure port of advancing, the pressure port that falls back, the first oil return opening；Described repid cut-off valve includes cut-out pressure mouth, principal pressure import, principal pressure outlet；Described speed shift valve includes fall back 1 grade of clutch pressure mouth, the 2 grades of clutch pressure mouths that fall back, the 1 grade of clutch pressure mouth that advances, advance 2 grades of clutch pressure mouths, backward gear pressure port, drive shift pressure port, the second oil return opening, the 3rd oil return opening, the 4th oil return openings；Direction gear shift valve rod, fast shut-off spool, speed shift valve rod all can slide in valve body；The slip of fast shut-off spool can realize the break-make between principal pressure import and principal pressure outlet；Direction gear shift valve rod slides in valve body, by the first steel ball, gear shift valve rod in direction is limited three positions, and direction gear shift valve rod moves correspondence backward gear during outermost, correspondence neutral gear time middle, correspondence drive shift during inner side to；Speed shift valve rod slides in valve body, by the second steel ball, speed shift valve rod is limited three positions, and speed shift valve rod moves correspondence one grade during outermost, correspondence neutral gear time middle, correspondence two grades during inner side to.
Accompanying drawing explanation
Fig. 1 is the manipulation valve arrangement schematic diagram of the present invention.
Fig. 2 is direction shift valve neutral position and the repid cut-off valve sectional view of A-A in Fig. 1.
Fig. 3 is shift valve backward gear position, direction and the repid cut-off valve sectional view of A-A in Fig. 1.
Fig. 4 is direction shift valve forward position and the repid cut-off valve sectional view of A-A in Fig. 1.
Fig. 5 is the speed shift valve neutral position sectional view of B-B in Fig. 1.
Fig. 6 is B-B speed shift valve 1 file location sectional view in Fig. 1.
Fig. 7 is B-B speed shift valve 2 file location sectional view in Fig. 1.
In Fig. 1: I-valve body；II-direction shift valve；III-repid cut-off valve；IV-speed shift valve；Y1, Y2, Y3 are internal connects oil duct.
In Fig. 2: 1-direction gear shift valve rod；2-the first ring washer；3-the first outside framework oil seal；4-the second sealing ring；5-the first sealed support；6-the first sealing ring；7-the first steel ball；8-the first spring；9-the first plug screw；10-the first sealing gasket；11-locking plate；12-stop valve spring；13-fast shut-off spool；14-the 4th sealing ring；15-the 3rd sealing ring；16-plug；17-the second ring washer；T1-the first oil return opening；PR-falls back pressure port；P3-main pressure port；PF-advance pressure port；P2-principal pressure exports；P1-principal pressure import；PD-cut-out pressure mouth.
In Fig. 5: 21-speed shift valve rod；22-third gear circle；23-the second outside framework oil seal；24-the 6th sealing ring；25-the second sealed support；26-the 5th sealing ring；27-the 4th plug screw；28-the 4th sealing gasket；29-the 5th plug screw；30-the 5th sealing gasket；31-the 6th plug screw；32-the 6th sealing gasket；33-the second plug screw；34-the second sealing gasket；35-the second spring；36-the second steel ball；37-the 7th plug screw；38-the 7th sealing gasket；39-the 3rd plug screw；40-the 3rd sealing gasket；T2-the second oil return opening；R1-falls back 1 grade of clutch pressure mouth；R-backward gear pressure port；R2-falls back 2 grades of clutch pressure mouths；T3-the 3rd oil return opening；F1-advances 1 grade of clutch pressure mouth；F-drive shift pressure port；F2-advances 2 grades of clutch pressure mouths；T4-the 4th oil return opening；CR1-falls back 1 grade of clutch pressure tap；CR2-falls back 2 grades of clutch pressure tap；CF1-advances 1 grade of clutch pressure tap；CF2-advances 2 grades of clutch pressure tap.
The effect of invention
The present invention achieves the fast shut-off of principal pressure by repid cut-off valve, in case of emergency quickly change speed gear box can be in neutral state.By control direction gear shift valve rod and speed shift valve rod, it is achieved that the 2 gearbox-gear function demand falling 1 neutral gear before 2, and each gear only has a set of clutch to enter pressure oil.The integrated machine hydraulic control system that the present invention is constituted handles valve, reduces volume, simplifies connecting line, it is simple to install, it is possible to meeting under the specific environment such as explosion-proof, machine liquid is handled the demand of valve by many gear power shift planetaries change speed gear box.
The manipulation valve of the present invention has the features such as easily manufactured, cost is relatively low, compact conformation, reliability are higher, wide accommodation, versatility are good simultaneously, can meet dissimilar and gear number less than or equal to 2 before 2 uses of machine hydraulic control change speed gear box falling 1 neutral gear.
Detailed description of the invention
Embodiment of the present invention being done detailed introduction below in conjunction with the accompanying drawings: as shown in Figure 1, Figure 2, Figure 5, the band cutting function duplex pull rod change speed gear box manipulation valve of the present invention includes that one is integrated with direction shift valve II, speed shift valve IV, repid cut-off valve III and constitutes the valve body I of a change speed gear box manipulation valve.
Described valve body I is inserted into the direction gear shift valve rod 1 that can slide in valve body I, and the one end of described direction gear shift valve rod 1 is encapsulated in valve body I, and the other end is stretched out outside valve body I；Inner side at valve body I, one first sealed support set 5 is on direction gear shift valve rod 1, first sealing ring 6 is enclosed within the first sealed support 5 inside groove and contacts with direction gear shift valve rod 1, second sealing ring 4 is enclosed within the first sealed support 5 water jacket and contacts with valve body I, one first outside framework oil seal 3 is outside the first sealed support 5, one first ring washer 2 is outside the first outside framework oil seal 3 and is stuck on valve body I, and first sealed support the 5, first sealing ring the 6, second sealing ring the 4, first outside framework oil seal 3 and the first ring washer 2 achieve the sealing structure of direction shift valve II jointly.
In described valve body I, one first spring 8 one end is pressed on the first steel ball 7, first steel ball 7 is pressed on direction gear shift valve rod 1, the other end of the first spring 8 is pressed on the first plug screw 9, told first spring the 8, first steel ball 7 to be encapsulated in valve body I by the first plug screw 9 and the first sealing gasket 10, jointly played the position-limiting action of direction gearshift procedure.
Described valve body I is inserted into the fast shut-off spool 13 that can slide in valve body I, described fast shut-off spool 13 is with direction gear shift valve rod 1 in the same centre bore of valve body I, and fast shut-off spool 13 and direction gear shift valve rod 1 are separated in being inserted in valve body I by a locking plate 11；One cuts off valve spring 12 one end is pressed on fast shut-off spool 13 end face, and stop valve spring 12 other end is pressed on locking plate 11；The other end of fast shut-off spool 13 is encapsulated in valve body I by plug 16 and the second ring washer 17, and one the 3rd sealing ring 15 is enclosed within plug 16, and one the 4th sealing ring 14 is enclosed within fast shut-off spool 13, plays seal pressure oil effect.
Described valve body I is inserted into the speed shift valve rod 21 that can slide in valve body I, and the one end of described speed shift valve rod 21 is encapsulated in valve body I, and the other end is stretched out outside valve body I.Inner side at valve body I, one second sealed support 25 is enclosed within gear shift gear shift valve rod 21,5th sealing ring 26 is enclosed within the second sealed support 25 inside groove and contacts with speed shift valve rod 21,6th sealing ring 24 is enclosed within the second sealed support 25 water jacket and contacts with valve body I, one second outside framework oil seal 23 is outside the second sealed support 25, one third gear circle 22 is outside the second outside framework oil seal 23 and is stuck on valve body I, and second sealed support the 25, the 5th sealing ring the 26, the 6th sealing ring the 24, second outside framework oil seal 23 and third gear circle 22 achieve the sealing structure of speed shift valve IV jointly.
In described valve body I, one second spring 35 one end is pressed on the second steel ball 36, second steel ball 36 is pressed on speed shift valve rod 21, the other end of the second spring 35 is pressed on the second plug screw 33, told second spring the 35, second steel ball 36 to be encapsulated in valve body I by the second plug screw 33 and the second sealing gasket 34, jointly played the position-limiting action of speed shift process.
The one end of described speed shift valve rod 21 is encapsulated in valve body I by the 3rd plug screw 39 and the 3rd sealing gasket 40, and described speed shift valve rod 21 is arranged in parallel in valve body I with direction gear shift valve rod 1；4th plug screw 27 and the 4th sealing gasket 28, 5th plug screw 29 and the 5th sealing gasket 30, 6th plug screw 31 and the 6th sealing gasket 32, 7th plug screw and 37 the 7th sealing gaskets 38 will fall back 1 grade of clutch pressure tap CR1 respectively, fall back 2 grades of clutch pressure tap CR2, advance 1 grade of clutch pressure tap CF1, 2 grades of clutch pressure tap CF2 of advancing are encapsulated in valve body I, four pressure tap and the second plug screw 33 are on same centrage, fall back 1 grade of clutch pressure tap CR1, fall back 2 grades of clutch pressure tap CR2, 1 grade of clutch pressure tap CF1 of advancing is arranged in the side of the second plug screw 33, 2 grades of clutch pressure tap CF2 of advancing are arranged in opposite side.
All having oil groove on described valve body I, direction gear shift valve rod 1, speed shift valve rod 21, fast shut-off spool 13, oil groove includes pressure port and oil return opening；Described direction shift valve II includes main pressure port P3, advance pressure port PF, pressure port PR that falls back, the first oil return inlet T 1；Described repid cut-off valve III includes that cut-out pressure mouth PD, principal pressure import P1, principal pressure export P2；Described speed shift valve IV includes fall back 1 grade of clutch pressure mouth R1, the 2 grades of clutch pressure mouth R2 that fall back, the 1 grade of clutch pressure mouth F1 that advances, advance 2 grades of clutch pressure mouth F2, backward gear pressure port R, drive shift pressure port F, second oil return inlet T the 2, the 3rd oil return inlet T the 3, the 4th oil return inlet T 4.
Direction gear shift valve rod 1, fast shut-off spool 13, speed shift valve rod 21 all can slide in valve body I；The slip of fast shut-off spool 12 can realize the break-make between principal pressure import P1 and principal pressure outlet P2；Direction gear shift valve rod 1 slides in valve body I, by the first steel ball 7, direction gear shift valve rod 1 is limited three positions, and direction gear shift valve rod 1 moves correspondence backward gear during outermost, correspondence neutral gear time middle, correspondence drive shift during inner side to；Speed shift valve rod 21 slides in valve body I, by the second steel ball 36, speed shift valve rod is limited three positions, and speed shift valve rod 21 moves correspondence one grade during outermost, correspondence neutral gear time middle, correspondence two grades during inner side to；Principal pressure outlet P2 is connected by Y1 oil duct with main pressure port P3, and pressure port PF that falls back is connected by Y2 oil duct with backward gear pressure port F, and advance pressure port PF is connected by Y3 oil duct with drive shift pressure port F.
The operation principle of the present invention is:
Pressure fuel pump oil enters principal pressure import P1, cut-out pressure mouth PD not oil-feed as repid cut-off valve III, principal pressure import P1 connects with principal pressure outlet P2, then by the main pressure port P3 of Y1 oil duct approach axis shift valve II, now repid cut-off valve III is inoperative；When the cut-out pressure mouth PD oil-feed of repid cut-off valve III, principal pressure import P1's and principal pressure outlet P2 is separated, pressure oil can not the main pressure port P3 of approach axis shift valve II, now repid cut-off valve III works, and pressure change speed gear box is neutral gear.
Fig. 2 is that direction shift valve II is in neutral state, and advance pressure port PF does not connects with main pressure port P3 with pressure port PR that falls back, and connects with the first oil return inlet T 1, it is achieved neutral gear.；
Fig. 3 is that direction shift valve II is in reverse gear state, and pressure port PR that falls back connects with main pressure port P3, and advance pressure port PF and the first oil return inlet T 1 connect, it is achieved reverse gear.
Fig. 4 is that direction shift valve II is in drive shift state, and advance pressure port PF connects with main pressure port P3, and pressure port PR that falls back and the first oil return inlet T 1 connect, it is achieved drive shift.
Fig. 5 is that speed shift valve IV is in neutral state, fall back 1 grade of clutch pressure mouth R1 and do not connect with backward gear pressure port R with the 2 grades of clutch pressure mouth R2 that fall back, advance 1 grade of clutch pressure mouth F1 and do not connect with drive shift pressure port F with the 2 grades of clutch pressure mouth F2 that advance, fall back 1 grade of clutch pressure mouth R1 and the second oil return inlet T 2 connects, the 2 grades of clutch pressure mouth R2 that fall back connect with 1 grade of clutch pressure mouth F1 of advance and the 3rd oil return inlet T 3, advance 2 grades of clutch pressure mouth F2 and the 4th oil return inlet T 4 connects, it is achieved neutral gear.
Fig. 6 is that speed shift valve IV is in 1 grade of state, the 1 grade of clutch pressure mouth R1 that falls back connects with backward gear pressure port R, the 1 grade of clutch pressure mouth F1 that advances connects with drive shift pressure port F, fall back 2 grades of clutch pressure mouth R2 and the 3rd oil return inlet T 3 connects, advance 2 grades of clutch pressure mouth F2 and the 4th oil return inlet T 4 connects, it is achieved 1 grade；If now shift valve II in direction is in drive shift, pressure oil enters pressure port PF in the past and enters drive shift pressure port F through Y3 oil duct, then connects with the 1 grade of clutch pressure mouth F1 that advances, it is achieved advance 1 grade；If now shift valve II in direction is in backward gear, pressure oil enters backward gear pressure port R from pressure port PR that falls back through Y2 oil duct, then connects with the 1 grade of clutch pressure mouth R1 that falls back, it is achieved fall back 1 grade.
Fig. 7 is that speed shift valve IV is in 2 grades of states, the 2 grades of clutch pressure mouth R2 that fall back connect with backward gear pressure port R, the 2 grades of clutch pressure mouth F2 that advance connect with drive shift pressure port F, fall back 1 grade of clutch pressure mouth R1 and the 4th oil return inlet T 4 connects, advance 1 grade of clutch pressure mouth F1 and the 3rd oil return inlet T 3 connects, it is achieved 2 grades；If now shift valve II in direction is in drive shift, pressure oil enters pressure port PF in the past and enters drive shift pressure port F through Y3 oil duct, then connects with the 2 grades of clutch pressure mouth F2 that advance, it is achieved advance 2 grades；Now shift valve II in direction is in backward gear, and pressure oil enters backward gear pressure port R from pressure port PR that falls back through Y2 oil duct, then connects with the 2 grades of clutch pressure mouth R2 that fall back, it is achieved fall back 2 grades.
Claims (1)
1. the change speed gear box of a dual-pulling rod type band cutting function is with handling valve, it includes that one is integrated with direction shift valve II, speed shift valve IV, repid cut-off valve III and constitutes the valve body I of a change speed gear box manipulation valve, it is characterized in that described valve body I is inserted into the direction gear shift valve rod 1 that can slide in valve body I, the one end of described direction gear shift valve rod 1 is encapsulated in valve body I, and the other end is stretched out outside valve body I；Inner side at valve body I, one first sealed support set 5 is on direction gear shift valve rod 1, first sealing ring 6 is enclosed within the first sealed support 5 inside groove and contacts with direction gear shift valve rod 1, second sealing ring 4 is enclosed within the first sealed support 5 water jacket and contacts with valve body I, one first outside framework oil seal 3 is outside the first sealed support 5, one first ring washer 2 is outside the first outside framework oil seal 3 and is stuck on valve body I, and first sealed support the 5, first sealing ring the 6, second sealing ring the 4, first outside framework oil seal 3 and the first ring washer 2 achieve the sealing structure of direction shift valve II jointly；
In described valve body I, one first spring 8 one end is pressed on the first steel ball 7, first steel ball 7 is pressed on direction gear shift valve rod 1, the other end of the first spring 8 is pressed on the first plug screw 9, told first spring the 8, first steel ball 7 to be encapsulated in valve body I by the first plug screw 9 and the first sealing gasket 10, jointly played the position-limiting action of direction gearshift procedure；
Described valve body I is inserted into the fast shut-off spool 13 that can slide in valve body I, described fast shut-off spool 13 is with direction gear shift valve rod 1 in the same centre bore of valve body I, and fast shut-off spool 13 and direction gear shift valve rod 1 are separated in being inserted in valve body I by a locking plate 11；One cuts off valve spring 12 one end is pressed on fast shut-off spool 13 end face, and stop valve spring 12 other end is pressed on locking plate 11；The other end of fast shut-off spool 13 is encapsulated in valve body I by plug 16 and the second ring washer 17, and one the 3rd sealing ring 15 is enclosed within plug 16, and one the 4th sealing ring 14 is enclosed within fast shut-off spool 13, plays seal pressure oil effect；
Described valve body I is inserted into the speed shift valve rod 21 that can slide in valve body I, and the one end of described speed shift valve rod 21 is encapsulated in valve body I, and the other end is stretched out outside valve body I；Inner side at valve body I, one second sealed support 25 is enclosed within gear shift gear shift valve rod 21,5th sealing ring 26 is enclosed within the second sealed support 25 inside groove and contacts with speed shift valve rod 21,6th sealing ring 24 is enclosed within the second sealed support 25 water jacket and contacts with valve body I, one second outside framework oil seal 23 is outside the second sealed support 25, one third gear circle 22 is outside the second outside framework oil seal 23 and is stuck on valve body I, and second sealed support the 25, the 5th sealing ring the 26, the 6th sealing ring the 24, second outside framework oil seal 23 and third gear circle 22 achieve the sealing structure of speed shift valve IV jointly；
In described valve body I, one second spring 35 one end is pressed on the second steel ball 36, second steel ball 36 is pressed on speed shift valve rod 21, the other end of the second spring 35 is pressed on the second plug screw 33, told second spring the 35, second steel ball 36 to be encapsulated in valve body I by the second plug screw 33 and the second sealing gasket 34, jointly played the position-limiting action of speed shift process；
The one end of described speed shift valve rod 21 is encapsulated in valve body I by the 3rd plug screw 39 and the 3rd sealing gasket 40, and described speed shift valve rod 21 is arranged in parallel in valve body I with direction gear shift valve rod 1；4th plug screw 27 and the 4th sealing gasket 28, 5th plug screw 29 and the 5th sealing gasket 30, 6th plug screw 31 and the 6th sealing gasket 32, 7th plug screw and 37 the 7th sealing gaskets 38 will fall back 1 grade of clutch pressure tap CR1 respectively, fall back 2 grades of clutch pressure tap CR2, advance 1 grade of clutch pressure tap CF1, 2 grades of clutch pressure tap CF2 of advancing are encapsulated in valve body I, four pressure tap and the second plug screw 33 are on same centrage, fall back 1 grade of clutch pressure tap CR1, fall back 2 grades of clutch pressure tap CR2, 1 grade of clutch pressure tap CF1 of advancing is arranged in the side of the second plug screw 33, 2 grades of clutch pressure tap CF2 of advancing are arranged in opposite side；
All having oil groove on described valve body I, direction gear shift valve rod 1, speed shift valve rod 21, fast shut-off spool 13, oil groove includes pressure port and oil return opening；Described direction shift valve II includes main pressure port P3, advance pressure port PF, pressure port PR that falls back, the first oil return inlet T 1；Described repid cut-off valve III includes that cut-out pressure mouth PD, principal pressure import P1, principal pressure export P2；Described speed shift valve IV includes fall back 1 grade of clutch pressure mouth R1, the 2 grades of clutch pressure mouth R2 that fall back, the 1 grade of clutch pressure mouth F1 that advances, advance 2 grades of clutch pressure mouth F2, backward gear pressure port R, drive shift pressure port F, second oil return inlet T the 2, the 3rd oil return inlet T the 3, the 4th oil return inlet T 4；
Direction gear shift valve rod 1, fast shut-off spool 13, speed shift valve rod 21 all can slide in valve body I；The slip of fast shut-off spool 12 can realize the break-make between principal pressure import P1 and principal pressure outlet P2；Direction gear shift valve rod 1 slides in valve body I, by the first steel ball 7, direction gear shift valve rod 1 is limited three positions, and direction gear shift valve rod 1 moves correspondence backward gear during outermost, correspondence neutral gear time middle, correspondence drive shift during inner side to；Speed shift valve rod 21 slides in valve body I, by the second steel ball 36, speed shift valve rod is limited three positions, and speed shift valve rod 21 moves correspondence one grade during outermost, correspondence neutral gear time middle, correspondence two grades during inner side to；Principal pressure outlet P2 is connected by Y1 oil duct with main pressure port P3, and pressure port PF that falls back is connected by Y2 oil duct with backward gear pressure port F, and advance pressure port PF is connected by Y3 oil duct with drive shift pressure port F.
Priority Applications (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339416A (en) * | 2017-07-11 | 2017-11-10 | 山东临工工程机械有限公司 | A kind of gearbox manual shift control valve |
| WO2018188449A1 (en) * | 2017-12-01 | 2018-10-18 | 徐工集团工程机械有限公司 | Travel motor shift valve, travel motor and construction machine |
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| US3613844A (en) * | 1968-11-30 | 1971-10-19 | Aisin Seiki | Forward-reverse and brake control valve |
| JPS57146964A (en) * | 1981-03-05 | 1982-09-10 | Hitachi Constr Mach Co Ltd | Multi-direction switching valve |
| CN2878758Y (en) * | 2005-08-19 | 2007-03-14 | 许自进 | Integrated multi-change valve for loader |
| CN201288716Y (en) * | 2008-10-31 | 2009-08-12 | 陈振虎 | Multi-oil path speed variant control valve |
| CN102072315A (en) * | 2010-08-16 | 2011-05-25 | 浙江高宇液压机电有限公司 | Novel variable-speed operating valve |
| CN201916475U (en) * | 2011-01-24 | 2011-08-03 | 山东郯工液压件制造有限公司 | Full-power gear-shifting gear box operating valve for loader |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339416A (en) * | 2017-07-11 | 2017-11-10 | 山东临工工程机械有限公司 | A kind of gearbox manual shift control valve |
| CN107339416B (en) * | 2017-07-11 | 2022-10-14 | 山东临工工程机械有限公司 | Manual gear shifting control valve for gearbox |
| WO2018188449A1 (en) * | 2017-12-01 | 2018-10-18 | 徐工集团工程机械有限公司 | Travel motor shift valve, travel motor and construction machine |
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| Publication number | Publication date |
|---|---|
| CN105889574B (en) | 2018-04-03 |
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