CN103437395A - Hydraulic loop for floating function of working device and excavator - Google Patents
Hydraulic loop for floating function of working device and excavator Download PDFInfo
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- CN103437395A CN103437395A CN2013104155469A CN201310415546A CN103437395A CN 103437395 A CN103437395 A CN 103437395A CN 2013104155469 A CN2013104155469 A CN 2013104155469A CN 201310415546 A CN201310415546 A CN 201310415546A CN 103437395 A CN103437395 A CN 103437395A
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Abstract
The invention discloses a hydraulic loop for a floating function of a working device and an excavator, belonging to the field of machine manufacturing. The hydraulic loop comprises a hydraulic pump 1, a hydraulic oil tank 6, an oil cylinder 5, a first valve body 3 and a second valve body 4, wherein a first inlet, a first outlet and a large cavity opening are arranged on the first valve body 3; a second inlet, a second outlet and a small cavity opening are arranged on the second valve body 4; the first inlet and the second inlet are communicated with each other and communicated with the hydraulic pump 1; the first outlet and the second outlet are communicated with each other and communicated with the hydraulic oil tank 6; the large cavity opening and the small cavity opening are respectively communicated with a large cavity and a small cavity of the oil cylinder 5; the first valve body 3 controls the large cavity opening to be connected and disconnected with the first inlet and the first outlet respectively; the second valve body 4 controls the small cavity opening to be connected and disconnected with the second inlet and the second outlet respectively. By adopting the technical scheme disclosed by the invention, no spare part needs to be added or changed, the assembly mode does not need to be changed; the floating function is further optimized; an energy source is saved; the structure and the operation are simplified. Thus, the cost is reduced; the efficiency is improved.
Description
Technical field
The invention belongs to plant equipment and manufacture field, relate to a kind of hydraulic circuit, relate in particular to a kind of hydraulic circuit and excavator of equipment float function.
Background technology
In all kinds of engineering machinery, hydraulic crawler excavator, because of powerful, uses the most general at present.Grading operation, as a critical function of excavator, often is used to.Hydraulic crawler excavator commonly used on market, when grading operation, need be controlled swing arm when promoting dipper, allows scraper bowl and ground keep a fixing angle.Complicated operation, be difficult for grasping, and operating efficiency is lower.
In engineering machinery field, especially, in loader, hydraulic crawler excavator, float function is often used in grading operation." float " and allow equipment (boom cylinder) in the free floating state, make the large chamber of boom cylinder and loculus intercommunication and be communicated with fuel tank, oil cylinder is in unloaded state.During grading operation, utilize equipment to be adjacent to ground from reboot level land device (as scraper bowl).The advantage of float function is obvious: (1) is not because needing the working oil that uses hydraulic pump to discharge, effectively energy conservation; (2) while utilizing float function to carry out grading operation, when running into larger resistance, can automatically cut the direction that resistance is less, reduce the wearing and tearing of scraper bowl, thereby can better on curved surface, carry out grading operation; (3) during with the excavator grading operation, without the operation swing arm, only need to control bucket arm cylinder, simplified operation, raise the efficiency.
Because of the plurality of advantages of float function, much digging machine manufacturer has increased unsteady operation function in its product.Yet at present both at home and abroad,, the operation function of realizing floating is hydraulic valve and a corresponding pilot-actuated valve of realizing float function of increase on the basis of normal function mostly, then external pipeline.Have in prior art and increase floating plug and pilot solenoid valve and corresponding connecting line on the basis of normal swing arm spool.During the work of floating, first open pilot solenoid valve, then handle swing arm decline handle, its complex structure, increased extra cost.
Summary of the invention
In view of this, the present invention, without increasing or changing a social system any part, also need not change the assembling mode, has further optimized float function, saved the energy, simplifies the structure and operated and then has reduced cost, has improved efficiency.
For achieving the above object, concrete technical scheme is as follows:
On the one hand, a kind of hydraulic circuit of equipment float function is provided, comprise hydraulic pump, hydraulic oil container, oil cylinder, the first valve body and the second valve body, described the first valve body is provided with the first import, the first outlet and large accent, described the second valve body is provided with the second import, the second outlet and little accent, described the first import and the second import communicate and communicate with described hydraulic pump, described the first outlet and the second outlet communicate and communicate with described hydraulic oil container, described large accent and loculus mouth communicate with large chamber and the loculus of described oil cylinder respectively, described the first valve body control described large accent respectively with described the first import, first the outlet communicate and disconnect, described the second valve body control described loculus mouth respectively with described the second import, second the outlet communicate and disconnect.
Preferably, also comprise one way valve, described hydraulic pump communicates with described the first import and the second import by described one way valve.
Preferably, described the first valve body and the second valve body are three-position three-way valve.
Preferably, the both sides of described the first valve body and the second valve body are equipped with guide switch.
Preferably, also comprise proportional pressure-reducing valve, described proportional pressure-reducing valve is connected with the guide switch of the second valve body with described the first valve body respectively by guide's oil circuit.
Preferably, described oil cylinder is boom cylinder.
On the other hand, provide a kind of excavator, comprise the hydraulic circuit of equipment float function as above.
With respect to prior art, the advantage of technical scheme of the present invention has:
1, with respect to the boom cylinder normal mode of operation, the technical program does not need to increase any extra element, only needs to change the signal of controller output, just can realize the switching of unsteady mode of operation, without increasing cost;
While 2, adopting float function, the operation of swing arm is fully conducted oneself with dignity and realized by swing arm, without hydraulic pump, additionally provide energy.
The accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the structural representation of the embodiment of the present invention.
Wherein, 1 is that hydraulic pump, 2 is that one way valve, 3 is that the first valve body, 4 is that the second valve body, 5 is that oil cylinder, 6 is that hydraulic oil container, 7 is proportional pressure-reducing valve; A, b, c, d, e, a1, a2, a3, a4 are pipeline; Four outlets that A1, A2, A3, A4 are proportional pressure-reducing valve.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
It should be noted that, in the situation that do not conflict, embodiment and the feature in embodiment in the present invention can combine mutually.
Below with reference to accompanying drawing, embodiments of the invention are done to concrete explaination.
The hydraulic circuit of a kind of equipment float function of embodiments of the invention, comprise hydraulic pump 1, hydraulic oil container 6, oil cylinder 5, the first valve body 3 and the second valve body 4 as shown in Figure 1.The first valve body 3 is provided with the first import, the first outlet and large accent, and the second valve body 4 is provided with the second import, the second outlet and little accent.
The first import and the second import communicate and communicate with hydraulic pump 1, and the first outlet and the second outlet communicate and communicate with hydraulic oil container 6, and large accent and loculus mouth communicate with large chamber and the loculus of oil cylinder 5 respectively.The first valve body 3 control large accent respectively with the communicating and disconnect of the first import, the first outlet; The second valve body 4 control the loculus mouths respectively with the communicating and disconnect of the second import, the second outlet.
Embodiments of the invention, without increasing or changing a social system any part, also need not change the assembling mode, further optimized float function, saved the energy, simplify the structure and operated and then have reduced cost, have improved efficiency.
In an embodiment of the present invention, oil cylinder 5 is preferably boom cylinder, and the first valve body 3 and the second valve body 4 all are preferably three-position three-way valve, also can be two groups of valve groups with three-position three-way valve function, or is two other form spools that have the three-position three-way valve function.
The spool of conventional control boom cylinder is three six-way valve cores, and lifting, decline and the inactive state of swing arm controlled respectively in its three positions.Embodiments of the invention are based on a kind of hydraulic circuit that the large loculus of boom cylinder can independently be controlled, " the large loculus of boom cylinder can independently be controlled " is about to conventional three six-way valve cores for controlling the large loculus of boom cylinder and replaces with two 3-position-3-way spools, controls respectively the large loculus of boom cylinder.Utilize controller to send control instruction, passing ratio reducing valve 7 is controlled respectively opening and the direction of two 3-position-3-way spools, makes the large loculus of boom cylinder independently to control.Control by various combinations, and then realize several functions.As while needing routine work, the large and small chamber of boom cylinder can be communicated with respectively to hydraulic pump 1 and hydraulic oil container 6; While as need, floating operation, the large and small chamber of boom cylinder can be communicated to hydraulic oil container 6 simultaneously.
As shown in fig. 1, in an embodiment of the present invention, when in normal mode of operation, when boom cylinder promotes, the A1 of proportional pressure-reducing valve 7, the A3 picked up signal, by pipeline a1, a3 is respectively to the right side of the first valve body 3 of controlling the large chamber of boom cylinder, control the left side output secondary pilot pressure of the second valve body 4 of boom cylinder loculus, make hydraulic pump 1 by pipeline a, one way valve 2, pipeline b, control the right position of first valve body 3 in the large chamber of boom cylinder, pipeline c communicates with the large chamber of boom cylinder 5, the loculus of boom cylinder 5 is through pipeline d simultaneously, control the left position of the second valve body 4 of boom cylinder loculus, pipeline e is communicated with hydraulic oil container 6.Now boom cylinder promotes.
When in normal mode of operation, when boom cylinder descends, the A2 of proportional pressure-reducing valve 7, the A4 picked up signal, by pipeline a2, a4 is respectively to the left side of the first valve body 3 of controlling the large chamber of boom cylinder, control the right side output secondary pilot pressure of the second valve body 4 of boom cylinder loculus, make hydraulic pump 1 by pipeline a, one way valve 2, pipeline b, control the right position of the second valve body 4 of boom cylinder loculus, pipeline d communicates with the loculus of boom cylinder 5, the large chamber of boom cylinder 5 is through pipeline c simultaneously, control the left position of first valve body 3 in the large chamber of boom cylinder, pipeline e is communicated with hydraulic oil container 6.Now boom cylinder descends.
When floating mode of operation, the A2 of proportional pressure-reducing valve 7, A3 picked up signal, by pipeline a2, a3 respectively to the left side of the first valve body 3 of controlling the large chamber of boom cylinder, control the left side output secondary pilot pressure of the second valve body 4 of boom cylinder loculus, the large chamber that makes boom cylinder 5 is communicated with hydraulic oil container 6 through pipeline c, the left position, the pipeline e that control first valve body 3 in the large chamber of boom cylinder, and the loculus of boom cylinder 5 also is communicated with hydraulic oil container 6 through left of the second valve body 4 of pipeline d, control boom cylinder loculus, pipeline e simultaneously.Now the large and small chamber of boom cylinder unloads simultaneously, in quick condition.
Therefore a switch mode can be set in control program, when making to handle swing arm decline handle, allow swing arm change floating mode into from drop mode.
Also comprise a kind of excavator in embodiments of the invention, be provided with the hydraulic circuit of equipment float function described above.Because the hydraulic circuit of above-mentioned equipment float function has above-mentioned technique effect, therefore, the excavator that is provided with the hydraulic circuit of this equipment float function also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, does not hereby repeat.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (7)
1. the hydraulic circuit of an equipment float function, it is characterized in that, comprise hydraulic pump (1), hydraulic oil container (6), oil cylinder (5), the first valve body (3) and the second valve body (4), described the first valve body (3) is provided with the first import, the first outlet and large accent, described the second valve body (4) is provided with the second import, the second outlet and little accent, described the first import and the second import communicate and communicate with described hydraulic pump (1), described the first outlet and the second outlet communicate and communicate with described hydraulic oil container (6), described large accent and loculus mouth communicate with large chamber and the loculus of described oil cylinder (5) respectively, described the first valve body (3) control described large accent respectively with described the first import, first the outlet communicate and disconnect, described the second valve body (4) control described loculus mouth respectively with described the second import, second the outlet communicate and disconnect.
2. the hydraulic circuit of equipment float function as claimed in claim 1, is characterized in that, also comprises one way valve (2), and described hydraulic pump (1) communicates with described the first import and the second import by described one way valve (2).
3. the hydraulic circuit of equipment float function as claimed in claim 2, is characterized in that, described the first valve body (3) and the second valve body (4) are three-position three-way valve.
4. the hydraulic circuit of equipment float function as claimed in claim 3, is characterized in that, the both sides of described the first valve body (3) and the second valve body (4) are equipped with guide switch.
5. the hydraulic circuit of equipment float function as claimed in claim 4, it is characterized in that, also comprise proportional pressure-reducing valve (7), described proportional pressure-reducing valve (7) is connected with the guide switch of the second valve body (4) with described the first valve body (3) respectively by guide's oil circuit.
6. the hydraulic circuit of equipment float function as claimed in claim 5, is characterized in that, described oil cylinder (5) is boom cylinder.
7. an excavator, is characterized in that, comprises the hydraulic circuit of equipment float function as described as claim 1 to 6 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013104155469A CN103437395A (en) | 2013-09-12 | 2013-09-12 | Hydraulic loop for floating function of working device and excavator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013104155469A CN103437395A (en) | 2013-09-12 | 2013-09-12 | Hydraulic loop for floating function of working device and excavator |
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| CN103437395A true CN103437395A (en) | 2013-12-11 |
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| CN2013104155469A Pending CN103437395A (en) | 2013-09-12 | 2013-09-12 | Hydraulic loop for floating function of working device and excavator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129332A (en) * | 2014-07-24 | 2014-11-05 | 三一矿机有限公司 | Lifting control structure and mining dump truck |
| CN111519677A (en) * | 2020-04-28 | 2020-08-11 | 三一重机有限公司 | Floating hydraulic system and engineering machinery |
| CN115748855A (en) * | 2022-12-16 | 2023-03-07 | 徐州徐工挖掘机械有限公司 | Excavator movable arm floating hydraulic control system and control method |
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| CN201647855U (en) * | 2010-02-26 | 2010-11-24 | 徐州重型机械有限公司 | Crane and hydraulic control system for single-cylinder bolt type telescopic mechanism thereof |
| CN201858210U (en) * | 2010-11-02 | 2011-06-08 | 王开怀 | Novel hydraulic oil way integrated valve of loader |
| CN102322461A (en) * | 2011-10-17 | 2012-01-18 | 上海三一重机有限公司 | Hydraulic actuating mechanism and method for recycling energy |
| CN102535571A (en) * | 2012-02-17 | 2012-07-04 | 上海三一重机有限公司 | System and method of regeneration control based on double spools for hydraulic excavator |
| JP2013083293A (en) * | 2011-10-07 | 2013-05-09 | Caterpillar Sarl | Hydraulic device for working machine |
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2013
- 2013-09-12 CN CN2013104155469A patent/CN103437395A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647855U (en) * | 2010-02-26 | 2010-11-24 | 徐州重型机械有限公司 | Crane and hydraulic control system for single-cylinder bolt type telescopic mechanism thereof |
| CN201858210U (en) * | 2010-11-02 | 2011-06-08 | 王开怀 | Novel hydraulic oil way integrated valve of loader |
| JP2013083293A (en) * | 2011-10-07 | 2013-05-09 | Caterpillar Sarl | Hydraulic device for working machine |
| CN102322461A (en) * | 2011-10-17 | 2012-01-18 | 上海三一重机有限公司 | Hydraulic actuating mechanism and method for recycling energy |
| CN102535571A (en) * | 2012-02-17 | 2012-07-04 | 上海三一重机有限公司 | System and method of regeneration control based on double spools for hydraulic excavator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129332A (en) * | 2014-07-24 | 2014-11-05 | 三一矿机有限公司 | Lifting control structure and mining dump truck |
| CN111519677A (en) * | 2020-04-28 | 2020-08-11 | 三一重机有限公司 | Floating hydraulic system and engineering machinery |
| CN111519677B (en) * | 2020-04-28 | 2022-03-01 | 三一重机有限公司 | Floating hydraulic system and engineering machinery |
| CN115748855A (en) * | 2022-12-16 | 2023-03-07 | 徐州徐工挖掘机械有限公司 | Excavator movable arm floating hydraulic control system and control method |
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Application publication date: 20131211 |