CN101612954A - The braking in a turn valve that is used for 520 horsepowers of bulldozers - Google Patents
The braking in a turn valve that is used for 520 horsepowers of bulldozers Download PDFInfo
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- CN101612954A CN101612954A CN200910012701A CN200910012701A CN101612954A CN 101612954 A CN101612954 A CN 101612954A CN 200910012701 A CN200910012701 A CN 200910012701A CN 200910012701 A CN200910012701 A CN 200910012701A CN 101612954 A CN101612954 A CN 101612954A
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Abstract
The invention discloses a kind of braking in a turn valve that is used for 520 horsepowers of bulldozers, it is characterized in that this valve system is by about two convertible valves of arranging, brake activation valve and the combine valve that latching valve is integrated of arranging about two, described convertible valve, brake activation valve and latching valve are integrated among the valve body I that has inner oil duct.Valve body I connects with valve body II by bolt I and sealing gasket I II, and by bolt II, plate and sealing gasket I, sealing gasket I I connect with valve body III simultaneously; Brake connecting rod mechanism and steering linkage are housed on the described valve body III, and steering linkage freely is connected with the push rod I of convertible valve by the eccentric block on it, and brake connecting rod mechanism then freely is connected with the push rod II of brake activation valve; On the described valve body II self-locking connecting rod mechanism is housed, is connected with unidirectional sliding valve key; This combine valve is installed on the bulldozer by bolt III.Adopt braking in a turn valve of the present invention can make the high-power bulldozer realize minor-circle turn and turn to afterwards earlier braking, and can realize the brake self-locking.
Description
Technical field
The present invention relates to slide-valve gear or valve gear, relate in particular to that a kind of high-power bulldozer turns to, brake control valve.Be used for 520 horsepowers of bulldozers in the process of walking about the fluid control that turns to and brake.
Background technology
Hydraulic transmission braking in a turn control cock is one of core apparatus of current advanced bulldozer employing.The braking in a turn valve base that bulldozer hydraulic transmission is at present used originally has two kinds of forms, and a kind of is the control steering clutch that combined by hand change over valve and liquid diverting flow valve and convertible valve, the brake activation valve of brake equipment.Another kind is to turn to the control of afterwards braking earlier to turning to brake spool respectively by the manual reverse of direction linkage, first kind of structure of this kind texture ratio has the little characteristics of volume, but pressure valve and braking in a turn valve are divided into two bodies to be installed on the adjacent pipeline, and structure is not compact.Above-mentioned two kinds of hydraulic transmission braking in a turn valves are because the requirement that flow is little, the low 520 horsepowers of bulldozers of equal out of reach of pressure turn to and brake; particularly lack hydraulic pressure self-locking brake defencive function, can not utilize the structure of valve self to eliminate the mistake walking action that bulldozer may occur after start.
Summary of the invention
The objective of the invention is to; overcome the shortcoming that has fluid power braking in a turn valve flow little (160L/min), pressure low (1.7Mpa), structure dispersion now and do not have self-locking protecting device; a kind of combined structure type braking in a turn valve is provided; being intended to effectively to control high-power bulldozer turning velocity, turn radius and brake application stoping requirement flow is 246L/min; in the time of pressure 2.69Mpa; can also increase its latching valve function, the mistake walking problem that occurs easily when solving start with hydraulic way.
Technical solution of the present invention is achieved in that
A kind of braking in a turn valve that is used for 520 horsepowers of bulldozers, it is characterized in that: this valve is the convertible valve of arranging by about two, brake activation valve and the combine valve that latching valve is integrated of arranging about two, described convertible valve, brake activation valve and latching valve are integrated among the valve body I that has internal oil passages, valve body I connects with valve body II by bolt I and sealing gasket I II, by bolt II, plate, sealing gasket I and sealing gasket I I connect with valve body III simultaneously; Brake connecting rod mechanism and steering linkage are housed on the wherein said valve body III, and steering linkage freely is connected with the push rod I of convertible valve by the eccentric block on it; Brake connecting rod mechanism then freely is connected with the push rod II of brake activation valve; On the described valve body II self-locking connecting rod mechanism is housed, is connected with unidirectional sliding valve key; This combine valve is installed on the bulldozer by bolt III; When bulldozer started, pressure oil P opened check valve through latching valve and enters brake activation valve, entered the big chamber of brake coupling after throttling, the promotion power-transfer clutch moves to right and makes brake band break away from road wheel, complete machine enters walking states, and at this moment, the pressure oil P of two convertible valves of flowing through is blocked; When the commutation of pulling convertible valve, pressure oil P flows into the big chamber of power-transfer clutch through convertible valve, and the promotion power-transfer clutch moves to right and makes power-transfer clutch break away from turning cylinder, realizes bigger the turning to of left rotation and right rotation radius; If when needing the minor radius pivot stud, continue the pulling convertible valve, its eccentric block is contacted with the push rod II (9) of brake activation valve, force pressure oil P to flow into fuel tank through brake activation valve, brake band is held road wheel tightly under the effect of the compression spring of left and right sides brake coupling; If when needing to stop, pulling left and right sides brake activation valve; After the parking, the handle of convertible valve and brake activation valve all returns original position; At this moment, latching valve commutates, and makes the oily oil sump tank of brake coupling, and complete machine is in braking state.
Described convertible valve is integrated in the valve pocket of described valve body I, and its internals comprise push rod I, guiding valve I, spring I, spool I, retracing spring I and piston I, and an end of described valve pocket is by the valve plug shutoff.
Described brake activation valve is integrated in the valve pocket of described valve body I, and its internals comprise push rod II, guiding valve II, spring II, spool II, piston I I and retracing spring II, and an end of described valve pocket is by the valve plug shutoff.
Described latching valve is integrated in described valve body I and connects with valve body II in the valve pocket that the back forms, and its internals comprise self-locking connecting rod mechanism, unidirectional guiding valve, retracing spring III and nonreturn valve core, and seal ring is connected between self-locking connecting rod mechanism and the valve body II.
Compared with prior art, advantage of the present invention shows: adopt braking in a turn valve of the present invention can make complete machine realize turning to afterwards earlier in concrete operations braking, turn radius is little, no compression shock, turn to light and flexible, braking is reliable rapidly, finishes the dual role that turns to and brake.Can realize the brake self-locking with hand change over valve, handle returns original position and could begin walking during starting, has prevented because car dangerous factor of travelling of walking at once behind the engine ignition when the walking gear.
Description of drawings
Drawings attached 6 width of cloth of the present invention, wherein:
Fig. 1 is a hydraulic schematic diagram of the present invention;
Fig. 2 is a profile scheme drawing of the present invention;
Fig. 3 is the birds-eye view of Fig. 2;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is the A-A cutaway view of Fig. 2;
Fig. 6 is a braking in a turn opening of valves closing pressure diagram of curves.
In the drawings: 1, steering linkage 2, push rod I 3, guiding valve I 4, spring I 5, spool I 6, retracing spring I 7, piston I 8, brake connecting rod mechanism 9, push rod II 10, guiding valve II11, spring II 12, spool II 13, piston I I 14, retracing spring II 15, self-locking connecting rod mechanism 16, unidirectional guiding valve 17, retracing spring III 18, nonreturn valve core 19, valve body I 20, valve body II 21, valve body III 22, sealing gasket I 23, sealing gasket I I 24, bolt I 25, bolt II 26, bolt III 27, plate 28, sealing gasket I II29, sealing gasket I V30, eccentric block, 100. convertible valve, 200. brake activation valve, 300. latching valve, 400. steering clutch, 500. brake coupling, 600. fuel tanks.
The specific embodiment
As Fig. 1～a kind of braking in a turn valve that is used for 520 horsepowers of bulldozers shown in Figure 5, its structure by about two convertible valves 100, about two brake activation valves 200, latching valves 300 form, be communicated with by valve body casting oil duct between each valve, the organic assembling of the structure function of utilizing valve module separately and the physical construction outside relevant with valve has realized the principle of high-power bulldozer and the requirement of function.Hydraulic principle of the present invention is: virgin state as shown in Figure 1, when bulldozer starts, pressure oil P is through latching valve 300, open check valve 18 and enter brake activation valve 200, after throttling, enter brake coupling 500 big chambeies, and promote power-transfer clutch 500 and move to right and make brake band break away from road wheel, complete machine enters walking states.At this moment, the flow through pressure oil P of two convertible valves 100 is blocked.When spurring steering linkage 1 commutation respectively, pressure oil P flows into power-transfer clutch 400 big chambeies through convertible valve 100, and promotion power-transfer clutch 400 moves to right and makes power-transfer clutch 400 release the drive axles, realizes bigger the turning to of left rotation and right rotation radius.If when needing the minor radius pivot stud, continue pulling steering linkage 1, this moment, pressure oil P flowed into fuel tank 6 through brake activation valve 200, and brake band is held road wheel (spur left brake activation valve during left steering, spur right brake activation valve during right steering) tightly under the effect of left and right sides brake coupling 500 compression spring power.If when needing to stop, pulling left and right sides brake activation valve 200 gets final product.Convertible valve 100 and brake activation valve 200 handles all return original position after stopping.After the shutdown,, make the oily oil sump tank 600 of brake coupling 500, be in braking state this moment latching valve 300 commutations.Behind the engine starting, latching valve 300 is retracted original position, make brake coupling 500 promote brake band and break away from road wheel, begin walking behind the engage a gear.This valve has played the self locking safety protective effect.
Below, in conjunction with the accompanying drawings 4 and accompanying drawing 5 the invention will be further described:
(1) structure of left and right sides convertible valve comprises vital partss such as steering linkage 1, push rod I 2, guiding valve I 3, spring I 4, spool I 5, retracing spring I 6, piston I 7 and valve body I 19.Initial position among Fig. 5 is a closure state, when pulling manual link assembly 1, promoting push rod I 2, guiding valve I 3 moves to left, under the promotion of spring I 4, spool I 5 also is moved to the left, make P mouth pressure oil after decompression, enter the A chamber and flow into the big chamber of steering clutch, the pressure oil of damping hole C of flowing through reacts on spool I 5 simultaneously, make stroke and pressure in the pressure-reduction outlet opening process meet the requirement of Fig. 6 curve, and promote power-transfer clutch release the drive axle and make it idle running, make bulldozer begin to turn to.When bulldozer needs minimum turning radius, can continue to spur described left connecting rod mechanism, after eccentric block on it turns over certain angle, begin to promote the push rod II9 of left brake activation valve, driving guiding valve II 10 moves to left, under the effect of compression spring II11, spool II 12 is moved to left, close restriction E gradually, the pressure oil of damping hole F of flowing through is adjusted the E mouths by piston I I 13, and the pressure before closed meets Fig. 6 curve, and the big chamber of brake coupling this moment fluid is by G chamber oil sump tank, brake band return under the effect of spring force is checked road wheel, realizes left and right sides small radius steering.When the left steering connecting rod mechanism returns original position, steering valve core I 5 is in the effect of retracing spring I6 original position and valve body closure next time, steering clutch returns original position and is connected with the bulldozer transmission shaft, brake spool II 12 is in the effect of retracing spring II 14 original position next time, restriction E is communicated with pressure oil P, makes bulldozer recover the cruising state.At this moment, left and right sides convertible valve has promptly played the commutation effect, has played pressure again and has changed corrective action, and this structure can realize the impact of commutation nothing, pressure smooth transition.
(2) structure of left and right sides brake activation valve is made up of brake connecting rod mechanism 8, push rod II9, guiding valve II 10, spring II11, spool II 12, piston I I 13 and retracing spring II 14 vital partss.During original position, after main frame starts, pressure oil P flows into left and right sides brake coupling by the throttling notch E of spool II 12, promotes brake band and breaks away from road wheel, the normal walking states during with the work of realization complete machine, when pulling brake connecting rod mechanism 8, about two braking valve modules drive guiding valve II 10 simultaneously and move to left, the antagonistic force of compression spring II11 promotes spool II 12 and moves to left, and closes restriction E, oil in the power-transfer clutch makes brake take back original position road wheel is checked parking by D chamber oil sump tank.
(3) structure of latching valve is made up of self-locking connecting rod assembly 15, unidirectional guiding valve 16, retracing spring III17, nonreturn valve core 18, valve body II 20 etc.When initial position shown in Figure 4, after the start, pressure oil P compression reseting spring III17 opens nonreturn valve core 18 inflow brake activation valves and enters mode of operation.During shutdown, pulling brake connecting rod mechanism 8 depresses unidirectional guiding valve 16, and under the effect of spring force, nonreturn valve core 18 isolated pressures oil P presses the setting pressure oil sump tank.This moment brake coupling fluid through P1, nonreturn valve core hole G, H after fuel tank is flowed back in the O chamber.At this moment, brake activation valve is in normal danger.When resetting, need that latching valve is retracted original position and could begin walking, even otherwise car can not walk at the walking gear, so this valve has been realized the safe self-locking defencive function.
(4) left and right sides steering linkage 1, left and right sides brake connecting rod mechanism 8 are installed on the valve body III 21, bolt II 25 is fixed on valve body III 21 on the valve body I 19, between valve body I 19 and the valve body III 21 plate 27 is arranged, sealing gasket I 22, sealing gasket I I 23 sealings are adopted in sealing.Unidirectional self-lock mechanism is installed on the valve body II 20, and bolt 24 is installed in valve body II 20 on the valve body I 19, adopts sealing gasket I II28 sealing between valve body II 20 and the valve body I 19.Bolt III26 is installed in whole convertible valve on the bulldozer, and sealing gasket I V29 sealing is adopted in sealing.
Claims (4)
1, a kind of braking in a turn valve that is used for 520 horsepowers of bulldozers, it is characterized in that: this valve is the convertible valve of arranging by about two (100), brake activation valve (200) and the integrated combine valve of a latching valve (300) arranged about two, described convertible valve (100), brake activation valve (200) and latching valve (300) are integrated among the valve body I (19) that has internal oil passages, valve body I (19) connects with valve body II (20) by bolt I (24) and sealing gasket I II (28), pass through bolt II (25), plate (27) and sealing gasket I (22) simultaneously, sealing gasket I I (23) connects with valve body III (21); Brake connecting rod mechanism (8) and steering linkage (1) are housed on the wherein said valve body III (21), and steering linkage (1) freely is connected with the push rod I (2) of convertible valve (100) by the eccentric block (30) on it; Brake connecting rod mechanism (8) then freely is connected with the push rod II (9) of brake activation valve (200); Self-locking connecting rod mechanism (15) is housed on the described valve body II (20), is connected with unidirectional guiding valve (16) key; This combine valve is installed on the bulldozer by bolt III (26); When bulldozer starts, pressure oil P opens check valve through latching valve (300) and enters brake activation valve (200), after throttling, enter the big chamber of brake coupling (500), promotion power-transfer clutch (500) moves to right and makes brake band break away from road wheel, complete machine enters walking states, at this moment, the flow through pressure oil P of two convertible valves (100) is blocked; When pulling convertible valve (100) commutation, pressure oil P flows into the big chamber of power-transfer clutch (400) through convertible valve (100), and promotion power-transfer clutch (400) moves to right and makes power-transfer clutch (400) break away from turning cylinder, realizes bigger the turning to of left rotation and right rotation radius; Continue pulling convertible valve (100), its eccentric block (30) is contacted with the push rod II (9) of brake activation valve (200), force pressure oil P to flow into fuel tank (600) through brake activation valve (200), brake band is held road wheel tightly under the effect of left and right sides brake coupling (500) compression spring; If when needing to stop, pulling left and right sides brake activation valve (200); After the parking, the handle of convertible valve (100) and brake activation valve (200) all returns original position; At this moment, latching valve (300) commutates, and makes the oily oil sump tank (600) of brake coupling (500), and complete machine is in braking state.
2, the braking in a turn valve that is used for 520 horsepowers of bulldozers according to claim 1, it is characterized in that described convertible valve (100) is integrated in the valve pocket of described valve body I (19), its internals comprise push rod I (2), guiding valve I (3), spring I (4), spool I (5), retracing spring I (6) and piston I (7), and an end of described valve pocket is by the valve plug shutoff.
3, the braking in a turn valve that is used for 520 horsepowers of bulldozers according to claim 2, it is characterized in that described brake activation valve (200) is integrated in the valve pocket of described valve body I (19), its internals comprise push rod II (9), guiding valve II (10), spring II (11), spool II (12), piston I I (13) and retracing spring II (14), and an end of described valve pocket is by the valve plug shutoff.
4, the braking in a turn valve that is used for 520 horsepowers of bulldozers according to claim 3, it is characterized in that described latching valve (300) is integrated in described valve body I (19) and connects with valve body II (20) in the valve pocket of back formation, its internals comprise self-locking connecting rod mechanism (15), unidirectional guiding valve (16), retracing spring III (17) and nonreturn valve core (19), have seal ring to be connected between self-locking connecting rod mechanism (15) and the valve body II (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100127016A CN101612954B (en) | 2009-07-23 | 2009-07-23 | Steering brake valve for 520- horsepower soil shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100127016A CN101612954B (en) | 2009-07-23 | 2009-07-23 | Steering brake valve for 520- horsepower soil shifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101612954A true CN101612954A (en) | 2009-12-30 |
| CN101612954B CN101612954B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100127016A Active CN101612954B (en) | 2009-07-23 | 2009-07-23 | Steering brake valve for 520- horsepower soil shifter |
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| Country | Link |
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| CN (1) | CN101612954B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032785A (en) * | 2013-03-06 | 2014-09-10 | 天津建筑机械厂 | Hydraulic valve assembly capable of simultaneously acting on two directions |
| CN104074217A (en) * | 2014-04-28 | 2014-10-01 | 三一重通机械有限公司 | Single-handle steering brake control system of bulldozer and bulldozer |
| CN105539575A (en) * | 2015-12-16 | 2016-05-04 | 中联重机股份有限公司 | Crawler walking mechanical hydraulic brake and steering mechanism |
| CN111497934A (en) * | 2020-04-24 | 2020-08-07 | 山推工程机械股份有限公司 | Steering brake system and steering brake control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201442560U (en) * | 2009-07-23 | 2010-04-28 | 大连兴龙液压有限公司 | Steering brake valve applied to 520 hp bulldozer |
-
2009
- 2009-07-23 CN CN2009100127016A patent/CN101612954B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032785A (en) * | 2013-03-06 | 2014-09-10 | 天津建筑机械厂 | Hydraulic valve assembly capable of simultaneously acting on two directions |
| CN104074217A (en) * | 2014-04-28 | 2014-10-01 | 三一重通机械有限公司 | Single-handle steering brake control system of bulldozer and bulldozer |
| CN105539575A (en) * | 2015-12-16 | 2016-05-04 | 中联重机股份有限公司 | Crawler walking mechanical hydraulic brake and steering mechanism |
| CN105539575B (en) * | 2015-12-16 | 2018-05-01 | 中联重机股份有限公司 | A kind of crawler running machinery water brake and steering mechanism |
| CN111497934A (en) * | 2020-04-24 | 2020-08-07 | 山推工程机械股份有限公司 | Steering brake system and steering brake control method |
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| Publication number | Publication date |
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| CN101612954B (en) | 2012-06-27 |
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Owner name: SHANTUI CONSTRUCTION MACHINERY CO., LTD. Free format text: FORMER OWNER: DALIAN XINGLONG HYDRAULIC CO., LTD. Effective date: 20121025 |
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Free format text: CORRECT: ADDRESS; FROM: 116200 DALIAN, LIAONING PROVINCE TO: 272073 JINING, SHANDONG PROVINCE |
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Effective date of registration: 20121025 Address after: High tech Zone 272073 in Shandong Province, Jining City 327 National Road No. 58 Shantui International Business Park Patentee after: Shantui Construction Machinery Co., Ltd. Address before: 116200 Liaoning Pulandian Taiping Office mine cave community Patentee before: Dalian Xinglong Hydraulic Co., Ltd. |