CN105805075A - Buffering loop avoiding influence on starting response and engineering machinery - Google Patents
Buffering loop avoiding influence on starting response and engineering machinery Download PDFInfo
- Publication number
- CN105805075A CN105805075A CN201610377984.4A CN201610377984A CN105805075A CN 105805075 A CN105805075 A CN 105805075A CN 201610377984 A CN201610377984 A CN 201610377984A CN 105805075 A CN105805075 A CN 105805075A
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- Prior art keywords
- pipeline
- control
- connects
- valve
- spring cavity
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The invention provides a buffering loop avoiding influence on starting response and engineering machinery. According to the buffering loop, a control handle is connected to an oil source and a first oil tank through pipelines, a first control port of the control handle is connected to a left spring cavity of a control valve core through a pipeline of a check valve and is connected to a first triggering port of a three-position two-way valve through a pipeline, a second control port of the control handle is connected to a right spring cavity of the control valve core through a pipeline of a check valve and is connected to a second triggering port of the three-position two-way valve through a pipeline, the left spring cavity is connected to the first control port of the control handle through a pipeline of a speed regulation valve and is connected to a first port at the middle position of the three-position two-way valve through a pipeline, the right spring cavity is connected to the second control port of the control handle through a pipeline of a speed regulation valve and is connected to a second port at the middle position of the three-position two-way valve through a pipeline, and a third port at the middle position of the three-position two-way valve is connected to a second oil tank through a pipeline. The buffering loop and the engineering machinery have the beneficial effects that a working device can be buffered, and influence on the movement speed of the control valve core is avoided; when a driver operates the control handle, the whole machinery is prevented from being shaken seriously, and influence on the response speed of the working device is avoided.
Description
Technical field
The present invention relates to hydraulic damping circuit technical field, particularly relate to a kind of buffer loop not affecting starting-up response and engineering machinery.
Background technology
The large-scale engineering machineries such as excavator generally can arrange multiple equipment to complete the work of various complexity, operator joystick (Remote control valve) controls multiple directional control valve to complete corresponding action, can ceaselessly carry out working in coordination with, switching between various actions.When driver stops operation suddenly certain handle, corresponding action can stop suddenly, owing to the inertia of equipment is relatively big, complete machine being caused acutely to rock, thus having influence on operability and the comfortableness of complete machine, even can cause security incident.Rock for reducing complete machine, generally arranging buffer loop on control loop, even if driver stops operation suddenly joystick, banked direction control valves controls spool without unexpected commutation, but slowly commutate within a certain period of time, slowly stop so that work clothes are equipped with a buffering course.Large-scale engineering machinery of the prior art, such as excavator, its buffer loop is at joystick and controls to increase by two one-way throttle valves respectively between spool, the effect of buffering can be played, but the use due to choke valve, the translational speed making control spool reduces, and then makes equipment response time elongated.For extending buffer time, the throttle orifice of one-way throttle valve is less, but makes the translational speed of control spool reduce further, makes equipment response time elongated；Meanwhile, and complete machine is in work a period of time, and when cleanliness of hydraulic oil is poor, owing to the throttle orifice of one-way throttle valve is less, hydraulic oil is just easy to blocking throttle orifice, causes complete machine action maybe cannot stop.
Summary of the invention
It is an object of the invention to provide a kind of buffer loop not affecting starting-up response and engineering machinery, equipment is being realized on the basis of buffering, it is to avoid impact controls the translational speed of spool and the response speed of equipment.
nullThe present invention provides a kind of buffer loop not affecting starting-up response，Including joystick、Control spool、Check valve、Flow speed control valve、Three-position three-way valve、Oil sources and fuel tank，Joystick pipeline respectively connects oil sources and fuel tank，The first of joystick controls mouth and connects the left side spring cavity controlling spool through check valve pipeline，The second of joystick controls mouth and connects the right side spring cavity controlling spool through check valve pipeline，The first of joystick controls mouth pipeline and connects the first triggering mouth of three-position three-way valve，The second of joystick controls mouth pipeline and connects the second triggering mouth of three-position three-way valve，Left side spring cavity connects the first control mouth of joystick through flow speed control valve pipeline，Right side spring cavity connects the second control mouth of joystick through flow speed control valve pipeline，Left side spring cavity pipeline connects the first interface of the middle position of three-position three-way valve，Right side spring cavity pipeline connects the second interface of the middle position of three-position three-way valve，3rd interface pipeline of the middle position of three-position three-way valve connects fuel tank.
Further, also including the first control knob and the second control knob, the first of the first control knob assembly connection joystick controls mouth, and the second of the second control knob assembly connection joystick controls mouth.
The present invention also provides for a kind of engineering machinery, including the above-mentioned buffer loop not affecting starting-up response.
Compared with prior art, the present invention the buffer loop not affecting starting-up response and engineering machinery has the characteristics that and advantage:
1, the buffer loop not affecting starting-up response of the present invention, it is achieved the buffering to equipment, and do not affect the translational speed controlling spool；
2, the engineering machinery of the present invention, when operator joystick, it is to avoid acutely rocking of complete machine, and does not affect the response speed of equipment.
After reading in conjunction with the accompanying the specific embodiment of the present invention, the features and advantages of the invention will become clearer from.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structure chart of the buffer loop not affecting starting-up response in the embodiment of the present invention；
Wherein,
1, joystick, 11, first controls mouth, and 12, second controls mouth, 13, the first control knob, the 14, second control knob, 2, control spool, 21, left side spring cavity, 22, right side spring cavity, 3, check valve, 4, flow speed control valve, 5, three-position three-way valve, 51, first triggers mouth, 52, second mouth is triggered, 53, first interface, the 54, second interface, 55, the 3rd interface, 6, oil sources, 7, fuel tank.
Detailed description of the invention
Do not affect the buffer loop of starting-up response as it is shown in figure 1, the present embodiment provides a kind of and include not affecting the excavator of the buffer loop of starting-up response.nullThe buffer loop not affecting starting-up response includes joystick 1、Control spool 2、Check valve 3、Flow speed control valve 4、Three-position three-way valve 5、Oil sources 6 and fuel tank 7，Joystick 1 pipeline respectively connects oil sources 6 and fuel tank 7，The first of first control knob 13 assembly connection joystick 1 controls mouth 11，The second of second control knob 14 assembly connection joystick 1 controls mouth 12，The first of joystick 1 controls mouth 11 and connects the left side spring cavity 21 controlling spool 2 through check valve 3 pipeline，The second of joystick 1 controls mouth 12 and connects the right side spring cavity 22 controlling spool 2 through check valve 3 pipeline，The first of joystick 1 controls mouth 11 pipeline and connects the first triggering mouth 51 of three-position three-way valve 5，The second of joystick 1 controls mouth 12 pipeline and connects the second triggering mouth 52 of three-position three-way valve 5，Left side spring cavity 21 connects the first control mouth 11 of joystick 1 through flow speed control valve 4 pipeline，Right side spring cavity 22 connects the second control mouth 12 of joystick 1 through flow speed control valve 4 pipeline，Left side spring cavity 21 pipeline connects the first interface 53 of the middle position of three-position three-way valve 5，Right side spring cavity 22 pipeline connects the second interface 54 of the middle position of three-position three-way valve 5，3rd interface 55 pipeline of the middle position of three-position three-way valve 5 connects fuel tank 7.
The buffer loop not affecting starting-up response in the present embodiment, its work process is as follows: when excavator driving person operates the first control knob 13, oil sources 6 controls mouth 11 through first and exports hydraulic oil, a part of hydraulic oil arrives, through check valve 3, the left side spring cavity 21 controlling spool 2 and promotes control spool 2 to move to right, some hydraulic oil arrives the first of three-position three-way valve 5 and triggers the first triggering mouth 51 of mouth 51, three-position three-way valve 5 is promoted to commutate to the right, so that the right side spring cavity 22 controlling spool 2 connects with fuel tank 7.So, left side spring cavity 21 oil-feed controlling spool 2 does not throttle, and controls right side spring cavity 22 oil return of spool 2 also without throttling, and the translational speed controlling spool 2 is unaffected, thus not affecting the response speed of digger operating device.Tests prove that, use the excavator of the above-mentioned buffer loop not affecting starting-up response can realize trembling soil operation (dipper discharging and dipper excavate handle and quickly switch).When excavator driving person stops operation the first control knob 13, first controls mouth 11 moment connection fuel tank 7, controls the spring in the right side spring cavity 22 of spool 2 and promotes control spool 2 to be moved to the left, controls the outside oil extraction of left side spring cavity 21 of spool 2.Now, position state in three-position three-way valve 5 recovery, so the left side spring cavity 21 controlling spool 2 can not pass through three-position three-way valve 5 oil extraction, the left side spring cavity 21 controlling spool 2 can not pass through check valve 3 oil extraction, so the left side spring cavity 21 of control spool 2 is only by flow speed control valve 4 oil extraction, the oil extraction flow of flow speed control valve 4 is certain value, therefore control oil extraction flow that spool 2 sets only in flow speed control valve 4 to left movement, so, by adjusting the specification of flow speed control valve 4, the translational speed controlling spool 2 just can be set, realize the buffering to equipment, avoid acutely rocking of excavator complete machine.In addition, setting of flow speed control valve 4 flow is relevant with the size of its interior spring rate and throttle orifice, therefore, it can the method for the spring by arranging less rigidity and increases orifice diameter, increasing thus realizing throttle orifice, reducing the purpose of blocking throttle orifice risk.Finding through reality debugging, using throttle orifice in the present embodiment is the buffering effect that the flow speed control valve 4 of diameter 2.5mm can reach that traditional one-way throttle valve that diameter is 0.8mm is same.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, the change made in the essential scope of the present invention of those skilled in the art, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (3)
- null1. the buffer loop not affecting starting-up response，It is characterized in that: include joystick、Control spool、Check valve、Flow speed control valve、Three-position three-way valve、Oil sources and fuel tank，Joystick pipeline respectively connects oil sources and fuel tank，The first of joystick controls mouth and connects the left side spring cavity controlling spool through check valve pipeline，The second of joystick controls mouth and connects the right side spring cavity controlling spool through check valve pipeline，The first of joystick controls mouth pipeline and connects the first triggering mouth of three-position three-way valve，The second of joystick controls mouth pipeline and connects the second triggering mouth of three-position three-way valve，Left side spring cavity connects the first control mouth of joystick through flow speed control valve pipeline，Right side spring cavity connects the second control mouth of joystick through flow speed control valve pipeline，Left side spring cavity pipeline connects the first interface of the middle position of three-position three-way valve，Right side spring cavity pipeline connects the second interface of the middle position of three-position three-way valve，3rd interface pipeline of the middle position of three-position three-way valve connects fuel tank.
- 2. a kind of buffer loop not affecting starting-up response according to claim 1, it is characterized in that: also include the first control knob and the second control knob, the first of first control knob assembly connection joystick controls mouth, and the second of the second control knob assembly connection joystick controls mouth.
- 3. an engineering machinery, it is characterised in that include the buffer loop not affecting starting-up response described in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610377984.4A CN105805075A (en) | 2016-05-31 | 2016-05-31 | Buffering loop avoiding influence on starting response and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610377984.4A CN105805075A (en) | 2016-05-31 | 2016-05-31 | Buffering loop avoiding influence on starting response and engineering machinery |
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| CN105805075A true CN105805075A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610377984.4A Pending CN105805075A (en) | 2016-05-31 | 2016-05-31 | Buffering loop avoiding influence on starting response and engineering machinery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907361A (en) * | 2017-03-22 | 2017-06-30 | 汤剑 | A kind of control system and its control method for circulating meal delivery device |
| CN110042880A (en) * | 2019-04-24 | 2019-07-23 | 青岛雷沃工程机械有限公司 | A kind of buffering response type excavation cleaner handgrip switching hydraulic system |
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| US20090145123A1 (en) * | 2007-12-10 | 2009-06-11 | Volvo Construction Equipment Holding Sweden Ab | Hydraulic circuit having holding valve of external pilot pressure operation type |
| CN201738368U (en) * | 2010-04-14 | 2011-02-09 | 福田雷沃国际重工股份有限公司 | Hydraulic damping control loop of excavator |
| CN102296666A (en) * | 2011-06-23 | 2011-12-28 | 中外合资沃得重工（中国）有限公司 | Pilot buffer device of excavator hydraulic motor |
| CN102788053A (en) * | 2012-07-27 | 2012-11-21 | 柳州柳工挖掘机有限公司 | Oil changing and buffering device used in pilot hydraulic control system |
| CN205639149U (en) * | 2016-05-31 | 2016-10-12 | 青岛雷沃挖掘机有限公司 | Do not influence buffering return circuit and engineering machine tool that start response |
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2016
- 2016-05-31 CN CN201610377984.4A patent/CN105805075A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090145123A1 (en) * | 2007-12-10 | 2009-06-11 | Volvo Construction Equipment Holding Sweden Ab | Hydraulic circuit having holding valve of external pilot pressure operation type |
| CN201738368U (en) * | 2010-04-14 | 2011-02-09 | 福田雷沃国际重工股份有限公司 | Hydraulic damping control loop of excavator |
| CN102296666A (en) * | 2011-06-23 | 2011-12-28 | 中外合资沃得重工（中国）有限公司 | Pilot buffer device of excavator hydraulic motor |
| CN102788053A (en) * | 2012-07-27 | 2012-11-21 | 柳州柳工挖掘机有限公司 | Oil changing and buffering device used in pilot hydraulic control system |
| CN205639149U (en) * | 2016-05-31 | 2016-10-12 | 青岛雷沃挖掘机有限公司 | Do not influence buffering return circuit and engineering machine tool that start response |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907361A (en) * | 2017-03-22 | 2017-06-30 | 汤剑 | A kind of control system and its control method for circulating meal delivery device |
| CN106907361B (en) * | 2017-03-22 | 2019-01-29 | 汤剑 | A kind of control system and its control method recycling meal delivery device |
| CN110042880A (en) * | 2019-04-24 | 2019-07-23 | 青岛雷沃工程机械有限公司 | A kind of buffering response type excavation cleaner handgrip switching hydraulic system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 266500 No. 75 east the Yellow River Road, Qingdao economic and Technological Development Zone, Shandong Applicant after: Qingdao leiwo Engineering Machinery Co. Ltd. Address before: 266500 No. 75 east the Yellow River Road, Qingdao economic and Technological Development Zone, Shandong Applicant before: QINGDAO LEIWO EXCAVATOR CO., LTD. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160727 |
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| RJ01 | Rejection of invention patent application after publication |