CN201420278Y - Pilot control valve group of large hydraulic excavator - Google Patents
Pilot control valve group of large hydraulic excavator Download PDFInfo
- Publication number
- CN201420278Y CN201420278Y CN2009201408351U CN200920140835U CN201420278Y CN 201420278 Y CN201420278 Y CN 201420278Y CN 2009201408351 U CN2009201408351 U CN 2009201408351U CN 200920140835 U CN200920140835 U CN 200920140835U CN 201420278 Y CN201420278 Y CN 201420278Y
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- valve
- mouth
- control
- communicated
- pilot
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- Expired - Fee Related
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Abstract
The utility model discloses a pilot control valve group of a large hydraulic excavator, which comprises a two-position five-way change valve, an inserted electromagnetic valve I, an inserted electromagnetic valve II, an inserted electromagnetic valve III, a valve body and the like. The pilot control valve group is characterized in that the two-position five-way change valve is integrated with a triple electromagnetic change valve group, and pressure chambers P, returning chambers T, control chambers A and control chambers B of the two-position five-way change valve and the triple electromagnetic change valve group are respectively mutually communicated. The pilot control valve group adopts the structure that a pressure opening is connected with a pilot pressure oil line P, a returning opening is communicated with an oil tank T, an opening a on the two-position five-way change valve is communicated with a left-turning pilot control oil line of a rotary motor, an opening b is communicated with a right-turning pilot control oil line of the rotary motor, an opening c is directly connected to a relaxation control opening of the rotary motor, an opening a1 of the triple electromagnetic change valve group is directly connected to a power increasing control opening of a multi-way change valve, and an opening a2 is directly connected to a speed changing control opening of a travel motor. The valve group can realize various hydraulic pilot control means, response quickly to inputted signals, and meet various requirements of a customer.
Description
Technical field
The utility model relates to a kind of large hydraulic excavator pilot-actuated valve group, be applied to hydraulic excavating machine multifunctional guide control system, can realize effective control of rotary motor guide oil circuit, the high low speed switching of running motor and the reinforcement pattern switching of hydraulic system fast.
Background technology
At present, the pilot solenoid valve group function singleness that most of hydraulic crawler excavators use only has the high low speed of walking to switch or reinforcement control or simple revolution locking control.For realizing that simultaneously above-mentioned three functions often need the electromagnetic valve with three or more, it is relatively large to take up room like this, but also can increase the complexity of control, can't satisfy effective control of rotary motor.
Summary of the invention
The purpose of this utility model is to provide a kind of pilot valve group that can solve the multiple function control technology of hydraulic crawler excavator.This programme forms one and integrates the pilot-actuated valve group that multiple guide controls function by high low speed switching, reinforcement being controlled, turned round the simplification of the integrated and valve group of lock function.
Technical solution of the present utility model is such: it is integrated by switch valve with two-position and five-pass and three solenoid operated directional valve groups, three solenoid operated directional valve groups are by the plug-in electromagnetic valve I, the plug-in electromagnetic valve II, plugged electric magnet valve III and valve body constitute, three solenoid operated directional valve groups and the integrated large hydraulic excavator of switch valve with two-position and five-pass pilot-actuated valve group, wherein the pressure chamber P of switch valve with two-position and five-pass and three solenoid operated directional valve groups connects mutually, oil back chamber T connects mutually, control chamber A connects mutually, control chamber B connects mutually, adopt pressure port to be connected with pilot pressure oil circuit P, oil return opening and fuel tank T connect, a mouth on the switch valve with two-position and five-pass is communicated with the left-hand rotation guide control oil channel of rotary motor, the b mouth is communicated with the right-hand rotation guide control oil channel of rotary motor, the c mouth is directly connected to the absent-mindedness control mouth of rotary motor, three solenoid operated directional valve group a1 mouths are directly connected to the reinforcement control mouth of multiple directional control valve, and the a2 mouth is directly connected to the speed Control mouth of running motor.
Switch valve with two-position and five-pass of the present utility model and three solenoid operated directional valve groups are integrated, and wherein the pressure chamber P of switch valve with two-position and five-pass and three solenoid operated directional valve groups connects mutually, and oil back chamber T interconnects, and control chamber A connects mutually, and control chamber B connects mutually.Adopt pressure port to be connected with pilot pressure oil circuit P, oil return opening and fuel tank T connect.Its advantage is to realize multiple hydraulic pilot control device, and to the input signal response rapidly, can satisfy the multinomial demand of client, has that function is many, reliability and durability, cost is lower, easy to install and advantage such as be widely used.
Description of drawings
It is such that structure of the present utility model constitutes:
Fig. 1 is a large hydraulic excavator pilot-actuated valve group overall structure assembling schematic diagram of the present utility model.
Fig. 2 is large hydraulic excavator pilot-actuated valve group circuit catenation principle figure of the present utility model.
Among Fig. 1 to Fig. 2: switch valve with two-position and five-pass (1), plug-in electromagnetic valve I (2), plug-in electromagnetic valve II (3), plugged electric magnet valve III (4), valve body (5), pilot pressure oil circuit P (6), multiple directional control valve reinforcement control mouthful (7), running motor speed Control mouth (8), a takes back changes motor left-hand rotation guide's oil circuit (9), b takes back changes motor right-hand rotation guide's oil circuit (10), c takes back the absent-mindedness mouth (11) that changes motor, right position (12), position, a left side (13), right position (14), position, a left side (15), right position (16), position, a left side (17), right position (18), position, a left side (19), fuel tank T (20).
The specific embodiment
Most preferred embodiment of the present utility model is such, with reference to Fig. 1～Fig. 2, a mouth on the switch valve with two-position and five-pass (1) is communicated with left guide's control oil channel of rotary motor, and the b mouth is communicated with right guide's control oil channel of rotary motor, and the c mouth is directly connected to the absent-mindedness mouth of rotary motor.When plug-in electromagnetic valve I (2) does not have signal to be normality, change guide's control oil channel about rotary motor and be communicated with fuel tank T (20), its servo-controlled multi-way reversing valve core is in the meta state, guarantees to cut off the working connection of rotary motor, attainment brake hydraulic pressure; The absent-mindedness mouth also is communicated with fuel tank T (20) simultaneously, and the mechanical braking element of rotary motor also is in locking state, can prevent maloperation, and the safety that also guarantees stopping brake is with stable.When plug-in electromagnetic valve I (2) when signal is arranged, guide's control oil channel of rotary motor, absent-mindedness control mouthful are connected with pilot pressure oil circuit P (6), the build-up pressure loop, and the rotary motor control element enters opening state, guarantees its operate as normal.As plugged electric magnet valve III (4) when not having signal, the speed Control mouth (8) of running motor is communicated with fuel tank T (20), running motor is a normal speed, as plugged electric magnet valve III (4) when obtaining signal, the speed Control mouth (8) of running motor is connected with pilot pressure oil circuit P (6), build-up pressure loop, running motor will switch at a high speed; In like manner, when plug-in electromagnetic valve II (3) when not having signal, the reinforcement control mouthful (7) of multiple directional control valve is communicated with fuel tank T (20), work system is a normal mode, when plug-in electromagnetic valve II (3) when signal is arranged, the reinforcement control mouthful (7) and the pilot pressure oil circuit P (6) of multiple directional control valve connect, the build-up pressure loop, and work system enters the reinforcement pattern.
Operating principle of the present utility model is such, when plug-in electromagnetic valve I (2) does not have signal to be normality, two-position four way change valve is in position, a left side (15) under spring action, A mouth on the switch valve with two-position and five-pass (1) is communicated with fuel tank T (20), the B mouth is communicated with pilot pressure oil circuit P (6), the spool left end cap becomes position, a left side (13) under pressure, and this moment, a, b and c mouth and T oil circuit were connected.When plug-in electromagnetic valve I (2) when signal is arranged, make two-position four-way transfer right position (14) to by position, a left side (15), A mouth on the switch valve with two-position and five-pass (1) is communicated with pilot pressure oil circuit P (6), the B mouth is communicated with fuel tank T (20), to make two-position five-way transfer right position (12) to by position, a left side (13), a, b mouth will be cut off, and the c mouth is communicated with pilot pressure oil circuit P (6), the build-up pressure loop; Whole commutation process can be realized the comprehensive control to rotary motor.
When plug-in electromagnetic valve II (3) does not have signal to be normality, two position three way directional control valve is in position, a left side (17) under spring action, a1 mouth and fuel tank T (20) connect, when plug-in electromagnetic valve II (3) when signal is arranged, make two-position three way transfer right position (16) to by position, a left side (17), the a1 mouth is communicated with pilot pressure oil circuit P (6), and feasible system transfers the control of reinforcement pattern to.
When plugged electric magnet valve III (4) does not have signal to be normality, two position three way directional control valve is in position, a left side (19) under spring action, a2 mouth and fuel tank T (20) connect, as plugged electric magnet valve III (4) when signal is arranged, make two-position three way transfer right position (18) to by position, a left side (19), the a2 mouth is communicated with pilot pressure oil circuit P (6), can realize the control that the high low speed of running motor switches.
Claims (4)
1, a kind of large hydraulic excavator pilot-actuated valve group, comprise switch valve with two-position and five-pass, the plug-in electromagnetic valve I, the plug-in electromagnetic valve II, plugged electric magnet valve III, valve body, it is characterized in that plug-in electromagnetic valve I (2), plug-in electromagnetic valve II (3), plugged electric magnet valve III (4) and valve body (5) constitute three solenoid operated directional valve groups, with the integrated large hydraulic excavator of switch valve with two-position and five-pass (1) pilot-actuated valve group, the pressure chamber P of switch valve with two-position and five-pass (1) and three solenoid operated directional valve groups connects mutually, oil back chamber T connects mutually, control chamber A connects mutually, control chamber B connects mutually, pressure port is connected with pilot pressure oil circuit P (6), oil return opening and fuel tank T (20) connect, a mouth on the switch valve with two-position and five-pass (1) is communicated with the left-hand rotation guide control oil channel of rotary motor, the b mouth is communicated with the right-hand rotation guide control oil channel of rotary motor, the c mouth is directly connected to the absent-mindedness control mouth of rotary motor, three solenoid operated directional valve group a1 mouths are directly connected to multiple directional control valve reinforcement control mouthful (7), and the a2 mouth is connected to running motor speed Control mouth (8).
2, according to the described a kind of large hydraulic excavator pilot-actuated valve group of claim 1, it is characterized in that when plug-in electromagnetic valve I (2) does not have the signal normality, two-position four way change valve is in position, a left side (15) under spring action, A mouth on the switch valve with two-position and five-pass (1) is communicated with fuel tank T (20), the B mouth is communicated with pilot pressure oil circuit P (6), the spool left end cap under pressure, become position, a left side (13), this moment a, b and c mouth and T oil circuit are connected, plug-in electromagnetic valve I (2) is when having signal, make two-position four-way transfer right position (14) to by position, a left side (15), A mouth on the switch valve with two-position and five-pass (1) is communicated with pilot pressure oil circuit P (6), the B mouth is communicated with fuel tank T (20), transfer right position (12), a with two-position five-way to by position, a left side (13), the b mouth will be cut off, and the c mouth is communicated with pilot pressure oil circuit P (6), the build-up pressure loop, whole commutation process can be to comprehensive control of rotary motor.
3, according to the described a kind of large hydraulic excavator pilot-actuated valve group of claim 1, it is characterized in that when plug-in electromagnetic valve II (3) does not have the signal normality, two position three way directional control valve is in position, a left side (17), a1 mouth and fuel tank T (20) connect, when plug-in electromagnetic valve II (3) has signal, two-position three way transfers right position (16) to by position, a left side (17), and the a1 mouth is communicated with pilot pressure oil circuit P (6), and system transfers the control of reinforcement pattern to.
4, according to the described a kind of large hydraulic excavator pilot-actuated valve group of claim 1, when it is characterized in that plugged electric magnet valve III (4) does not have the signal normality, two position three way directional control valve is in position, a left side (19) under spring action, a2 mouth and fuel tank T (20) connect, plugged electric magnet valve III (4) has signal, two-position three way transfers right position (18) to by position, a left side (19), and the a2 mouth is communicated with pilot pressure oil circuit P (6), the high low speed switching controls of running motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201408351U CN201420278Y (en) | 2009-05-12 | 2009-05-12 | Pilot control valve group of large hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201408351U CN201420278Y (en) | 2009-05-12 | 2009-05-12 | Pilot control valve group of large hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201420278Y true CN201420278Y (en) | 2010-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201408351U Expired - Fee Related CN201420278Y (en) | 2009-05-12 | 2009-05-12 | Pilot control valve group of large hydraulic excavator |
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| Country | Link |
|---|---|
| CN (1) | CN201420278Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140808A (en) * | 2011-01-11 | 2011-08-03 | 徐州徐工挖掘机械有限公司 | Device for enhancing excavating handling characteristics and levelling operation characteristics of excavator |
-
2009
- 2009-05-12 CN CN2009201408351U patent/CN201420278Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140808A (en) * | 2011-01-11 | 2011-08-03 | 徐州徐工挖掘机械有限公司 | Device for enhancing excavating handling characteristics and levelling operation characteristics of excavator |
| CN102140808B (en) * | 2011-01-11 | 2012-05-23 | 徐州徐工挖掘机械有限公司 | Device for enhancing excavation-handling characteristics and levelling operation characteristics of excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YUCHAI HEAVY INDUSTRY (CHANGZHOU) CO., LTD. Free format text: FORMER OWNER: GUANGXI YUCHAI HEAVY INDUSTRY COMPANY LIMITED Effective date: 20120322 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 537005 YULIN, GUANGXI ZHUANG AUTONOMOUS REGION TO: 213167 CHANGZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120322 Address after: 213167 No. 505 Chang Wu Road, Jiangsu, Changzhou Patentee after: Yuchai heavy industry (Changzhou) Co., Ltd. Address before: 537005 flyover Road, the Guangxi Zhuang Autonomous Region, Yulin No. 168 Patentee before: Guangxi Yuchai Heavy Industry Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20140512 |