CN103062141A - Track traveling mechanism, hydraulic system thereof and engineering machinery - Google Patents
Track traveling mechanism, hydraulic system thereof and engineering machinery Download PDFInfo
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- CN103062141A CN103062141A CN2012105628338A CN201210562833A CN103062141A CN 103062141 A CN103062141 A CN 103062141A CN 2012105628338 A CN2012105628338 A CN 2012105628338A CN 201210562833 A CN201210562833 A CN 201210562833A CN 103062141 A CN103062141 A CN 103062141A
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Abstract
The invention provides a track traveling mechanism and a hydraulic system thereof and engineering machinery. The hydraulic system of the track traveling mechanism comprises a main valve, a regulating valve set, a first constant displacement motor and a second constant displacement motor, wherein the first constant displacement motor and the second constant displacement motor are in parallel or series connection with the main valve through the regulating valve set. The first constant displacement motor and the second constant displacement motor which are in parallel connection with the main valve are in a state of low speed large driving force, and the first constant displacement motor and the second constant displacement motor which are in series connection with the main valve are in a state of high speed small driving force. The hydraulic system of the track traveling mechanism uses two constant displacement motors, so that the driving wheel arrangement space is saved and the advantages of large traveling driving force, reasonable track force carrying, low center of gravity of device and the like are obtained. And the two constant displacement motors can be in parallel or series connection through the regulating valve set, so that the switch between high-speed gear and low-speed gear can be achieved and the functions of low-speed moving for working and high-speed transfer can be further achieved.
Description
Technical field
The present invention relates to engineering machinery field, particularly the hydraulic system of a kind of creeper undercarriage, creeper undercarriage and engineering machinery.
Background technique
Existing caterpillar track travelling engineering machinery, its one-sided crawler belt adopt single fluid motor-driven usually, and walking realizes with the discharge capacity that low gear is regulated by changing oil hydraulic motor at a high speed.If adopt fixed displacement motor to drive, then can't realize the high driven at low speed of walking with the method.Compare with the variable displacement motor with discharge capacity regulatory function, the fixed displacement motor reliability is higher, cost is lower.But fixed displacement motor is owing to lacking the discharge capacity controlling mechanism, and its speed of travel only has a kind of state, can't satisfy simultaneously the complex conditions demand of tick-over, high-speed mobile.
Summary of the invention
In view of this, the present invention is intended to propose hydraulic system and the engineering machinery of a kind of creeper undercarriage, creeper undercarriage, problem that can't speed change when solve adopting fixed displacement motor to drive creeper undercarriage.
For achieving the above object, technological scheme of the present invention is achieved in that
On the one hand, the invention provides a kind of hydraulic system of creeper undercarriage, comprise main valve, modulating valve group, the first fixed displacement motor and the second fixed displacement motor, described the first fixed displacement motor be connected fixed displacement motor being connected with described main valve by described modulating valve group or in parallel or series connection; When described the first fixed displacement motor and the second fixed displacement motor parallel with one another be connected with main valve the time, described the first fixed displacement motor and the second fixed displacement motor are low speed large driving force state; When described the first fixed displacement motor mutually connect with the second fixed displacement motor be connected with described main valve the time, described the first fixed displacement motor and the second fixed displacement motor are the little driving force state of high speed.
Further, described modulating valve group comprises the first selector valve, the first cartridge valve, the second cartridge valve and the 3rd cartridge valve, described the first selector valve is the selector valve that has four-way at least, and described the first cartridge valve, the second cartridge valve and the 3rd cartridge valve are the directional control valve assembly; Wherein, the oil inlet P 4 of described the first selector valve respectively with A mouth, the B mouth unilaterally connected of described main valve, be that the A mouth is to the one-way flow of P4 mouth, the B mouth is to the one-way flow of P4 mouth, the oil return inlet T 4 of described the first selector valve takes back fuel tank, the A4 mouth of described the first selector valve is communicated with the control end X2 of described the second cartridge valve, and the B4 mouth of described the first selector valve is communicated with the control end X1 of described the first cartridge valve, the control end X3 of the 3rd cartridge valve simultaneously; The A1 mouth of described the first cartridge valve is communicated with the A mouth of described main valve, the A5 mouth of the first fixed displacement motor simultaneously, the B1 mouth of described the first cartridge valve is communicated with the B2 mouth of described the second cartridge valve, the A6 mouth of the second fixed displacement motor simultaneously, the A2 mouth of described the second cartridge valve is communicated with the A3 mouth of the 3rd cartridge valve, the B5 mouth of the first fixed displacement motor simultaneously, and the B3 mouth of described the 3rd cartridge valve is communicated with the B mouth of described main valve, the B6 mouth of the second fixed displacement motor simultaneously.
Further, also comprise the hydraulic tensioning oil circuit, described hydraulic tensioning oil circuit comprises the second selector valve and tensioning hydro-cylinder, the filler opening while of described the second selector valve and A mouth, the B mouth unilaterally connected of described main valve, it is the filler opening one-way flow of A mouth to the second selector valve, the filler opening one-way flow of B mouth to the second selector valve, the oil outlet of described the second selector valve is communicated with described tensioning hydro-cylinder.
Further, to the oil circuit of described tensioning hydro-cylinder, also be provided with reduction valve and/or relief valve at described the second selector valve.
Further, to the oil circuit of described tensioning hydro-cylinder, also be provided with accumulator at described the second selector valve.
Further, also comprise the 3rd selector valve for off-load, the filler opening of described the 3rd selector valve is communicated with the oil outlet of described the second selector valve, and the oil outlet of described the 3rd selector valve takes back fuel tank.
On the other hand, the present invention also provides a kind of creeper undercarriage, its either side traveller includes track frame and Idle wheel, described creeper undercarriage either side traveller is provided with the hydraulic system of aforesaid creeper undercarriage, wherein, described the first fixed displacement motor and the second fixed displacement motor are separately positioned on the front-end and back-end that this skidding is walked mechanism, and described tensioning hydro-cylinder one end is connected with the track frame that this skidding is walked mechanism, and the other end is connected with the Idle wheel that this skidding is walked mechanism.
Further, between described track frame and described Idle wheel, also be provided with clamp for mechanical tensioning.
On the one hand, the present invention also provides a kind of engineering machinery that is provided with above-mentioned creeper undercarriage again.
With respect to prior art, the present invention has following advantage:
(1) creeper undercarriage of the present invention adopts two fixed displacement motors to drive driving speed reducers, has saved the driving wheel arrangement space, the advantage such as have that the walking driving force is large, crawler belt reasonable stress, equipment center of gravity are low; And these two fixed displacement motors can pass through the regulating valve block serial or parallel connection, realize the switching of low speed gear and high speed gear, and then realize that the low speed worker of creeper undercarriage advances and the fast transfer function.
(2) creeper undercarriage of the present invention adopts the crawler tensioning mode of operation of hydraulic automatic tensioner and mechanical tensioning combination, and crawler tensioning is easier and reliable.
Description of drawings
The accompanying drawing that consists of a part of the present invention is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic system schematic diagram of the described creeper undercarriage of the embodiment of the invention;
Fig. 2 is the schematic diagram of the one-sided traveller of the described creeper undercarriage of the embodiment of the invention.
Description of reference numerals:
The 1-main valve, 2-modulating valve group, 3-the first fixed displacement motor, 4-the second fixed displacement motor, 5-the second selector valve, 6-tensioning modulating valve group, 61-accumulator, 62-reduction valve, 63-the 3rd selector valve, 64-relief valve, 7-tensioning hydro-cylinder, 8-track frame, 9-Idle wheel, 10-clamp.
Embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the present invention can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Fig. 1 is the hydraulic system schematic diagram of the described creeper undercarriage of the present embodiment, and as shown in FIG., this hydraulic system comprises that walking drives oil circuit and hydraulic tensioning oil circuit.
This walking drives oil circuit and comprises main valve 1, modulating valve group 2, the first fixed displacement motor 3 and the second fixed displacement motor 4, the first fixed displacement motors 3 and be connected fixed displacement motor 4 being connected with main valve 1 by modulating valve group 2 or in parallel or series connection; When the first fixed displacement motor 3 and the second fixed displacement motor 4 parallel with one another be connected with main valve 1 time, the first fixed displacement motor 3 and the second fixed displacement motor 4 are low speed large driving force state; When the first fixed displacement motor 3 and the second fixed displacement motor 4 mutually during being connected with main valve 1 of series connection, the first fixed displacement motor 3 and the second fixed displacement motor 4 are the little driving force state of high speed.This modulating valve group 2 comprises the first selector valve, the first cartridge valve, the second cartridge valve and the 3rd cartridge valve, and the first selector valve is the two-position four-way solenoid directional control valve, and the first cartridge valve, the second cartridge valve and the 3rd cartridge valve are the directional control valve assembly; Wherein, the oil inlet P 4 of the first selector valve respectively with A mouth, the B mouth unilaterally connected of main valve 1, namely the A mouth is to the one-way flow of P4 mouth, the B mouth is to the one-way flow of P4 mouth, the single-phase connection here all can realize by one-way valve; The oil return inlet T 4 of this first selector valve takes back fuel tank, and the A4 mouth of the first selector valve is communicated with the control end X2 of the second cartridge valve, and the B4 mouth of the first selector valve is communicated with the control end X1 of the first cartridge valve, the control end X3 of the 3rd cartridge valve simultaneously; The A1 mouth of the first cartridge valve is communicated with the A mouth of main valve 1, the A5 mouth of the first fixed displacement motor 3 simultaneously, the B1 mouth of the first cartridge valve is communicated with the B2 mouth of the second cartridge valve, the A6 mouth of the second fixed displacement motor 4 simultaneously, the A2 mouth of the second cartridge valve is communicated with the A3 mouth of the 3rd cartridge valve, the B5 mouth of the first fixed displacement motor 3 simultaneously, and the B3 mouth of the 3rd cartridge valve is communicated with the B mouth of main valve 1, the B6 mouth of the second fixed displacement motor 4 simultaneously.
This hydraulic tensioning oil circuit comprises the second selector valve 5, tensioning hydro-cylinder 7 and tensioning modulating valve group 6, and this tensioning modulating valve group 6 comprises the 3rd selector valve 63, tensioning hydro-cylinder 7, accumulator 61, reduction valve 62 and relief valve 64.In the present embodiment, this second selector valve 5 and the 3rd selector valve 63 are two-position two-way solenoid valve, in other embodiments, also can be the on-off valve of other types, such as electromagnetism on-off valve, electric liquid on-off valve, hydraulic control on-off valve, manual on-off valve etc.The filler opening of this second selector valve 5 is communicated with the oil inlet P 4 of the first selector valve, namely simultaneously with A mouth, the B mouth unilaterally connected of main valve 1, the oil outlet of the second selector valve 5 is communicated with the rodless cavity of tensioning hydro-cylinder 7 and the filler opening of the 3rd selector valve 63 simultaneously, the 3rd selector valve 63 is used for the off-load of tensioning hydro-cylinder 7, the oil outlet of the 3rd selector valve 63 takes back fuel tank, and this accumulator 61, reduction valve 62 and relief valve 64 all are arranged on the second selector valve 5 to the oil circuit of tensioning hydro-cylinder 7.This reduction valve 62 is used for the pressure maximum of restriction tensioning hydro-cylinder 7, causes creeper undercarriage to move to prevent that tension force is excessive.This accumulator 61 is used for replenishing the leakage in tensioning loop, without the walking driving pressure time, also can keep the pressure of tensioning hydro-cylinder 7.
When above-mentioned hydraulic work system, higher one of pressure is communicated with the P4 mouth of the first selector valve in the A mouth of main valve 1, the B mouth, if the filler opening of the second selector valve 5 and oil outlet are communicated with, then pressure oil enters the rodless cavity of tensioning hydro-cylinder 7 after reduction valve 62 pressure limitings, makes tensioning hydro-cylinder 7 work;
If the P4 mouth of the first selector valve and A4 mouth are communicated with, T4 mouth and B4 mouth are communicated with, then the spring chamber of the first cartridge valve and the 3rd cartridge valve is respectively by the X1 mouth, the X3 mouth is through the B4 mouth, the off-load of T4 mouth, A1 mouth and B1 mouth are disconnected, A3 mouth and B3 mouth disconnect, the X2 mouth of the second cartridge valve is by the P4 mouth, the A4 mouth is communicated with pressure oil, A2 mouth and the B2 mouth of the second cartridge valve are communicated with, at this moment, the A5 mouth of the first fixed displacement motor 3 is communicated with the A mouth of main valve 1, the B5 mouth of the first fixed displacement motor 3 is through the A3 mouth, the A2 mouth, the B2 mouth is communicated with the A6 mouth of the second fixed displacement motor 4, the B6 mouth of the second fixed displacement motor 4 is communicated with the B mouth of main valve 1, namely the first fixed displacement motor 3 is connected with main valve 1 after fixed displacement motor 4 is connected with being connected, therefore the pressure reduction between the first fixed displacement motor 3 and the second fixed displacement motor 4 two-port is half of pressure reduction between main valve 1A mouth and the B mouth, and the first fixed displacement motor 3 and the second fixed displacement motor 4 are in the little driving force working state of high speed;
If the P4 mouth of the first selector valve and B4 mouth are communicated with, T4 mouth and A4 mouth are communicated with, then the spring chamber of the second cartridge valve passes through the X2 mouth through the A4 mouth, the off-load of T4 mouth, A2 mouth and B2 mouth are disconnected, the X1 mouth of the first cartridge valve and the X3 mouth of the 3rd cartridge valve are by the P4 mouth, the B4 mouth is communicated with pressure oil, A1 mouth and the B1 mouth of the first cartridge valve are communicated with, the A3 mouth of the 3rd cartridge valve and B3 mouth are communicated with, at this moment, the A5 mouth of the first fixed displacement motor 3 is communicated with the A mouth of main valve 1, the B5 mouth of the first fixed displacement motor 3 is through the A3 mouth, the B3 mouth is communicated with the B mouth of main valve 1, the A6 mouth of the first fixed displacement motor 3 is through the B1 mouth, the A1 mouth is communicated with the A mouth of main valve 1, the B6 mouth of the first fixed displacement motor 3 is communicated with the B mouth of main valve 1, namely the first fixed displacement motor 3 be connected fixed displacement motor 4 and be connected with main valve 1 after in parallel, therefore the pressure reduction between the first fixed displacement motor 3 and the second fixed displacement motor 4 two-port equals the pressure reduction between main valve 1A mouth and the B mouth, and the first fixed displacement motor 3 and the second fixed displacement motor 4 are in low speed large driving force working state.
Hydraulic system except above-mentioned creeper undercarriage, the embodiment of the invention also provides a kind of creeper undercarriage, this creeper undercarriage comprises left and right sides traveller, the either side traveller includes track frame 8, the hydraulic system of Idle wheel 9 and the described creeper undercarriage of above-described embodiment, Fig. 2 is the schematic diagram of one-sided traveller, as shown in FIG., the first fixed displacement motor 3 and the second fixed displacement motor 4 are separately positioned on the front-end and back-end that this skidding is walked mechanism, these tensioning hydro-cylinder 7 one ends are connected with the track frame 8 that this skidding is walked mechanism, the other end is connected with the Idle wheel 9 that this skidding is walked mechanism, also is provided with the clamp 10 for mechanical tensioning between track frame 8 and Idle wheel 9.
Except above-mentioned creeper undercarriage, the embodiment of the invention also provides a kind of engineering machinery that is provided with above-mentioned creeper undercarriage, and the structure of other each several part of this project machinery is with reference to prior art, and this paper repeats no more.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the hydraulic system of a creeper undercarriage, it is characterized in that, comprise main valve (1), modulating valve group (2), the first fixed displacement motor (3) and the second fixed displacement motor (4), described the first fixed displacement motor (3) be connected fixed displacement motor (4) being connected with described main valve (1) by described modulating valve group (2) or in parallel or series connection; When described the first fixed displacement motor (3) and the second fixed displacement motor (4) parallel with one another with main valve (1) when being connected, described the first fixed displacement motor (3) and the second fixed displacement motor (4) are low speed large driving force state; When described the first fixed displacement motor (3) and the second fixed displacement motor (4) mutually series connection with described main valve (1) when being connected, described the first fixed displacement motor (3) and the second fixed displacement motor (4) are the little driving force state of high speed.
2. the hydraulic system of creeper undercarriage according to claim 1, it is characterized in that, described modulating valve group (2) comprises the first selector valve, the first cartridge valve, the second cartridge valve and the 3rd cartridge valve, described the first selector valve is the selector valve that has four-way at least, and described the first cartridge valve, the second cartridge valve and the 3rd cartridge valve are the directional control valve assembly; Wherein, the oil inlet P 4 of described the first selector valve respectively with A mouth, the B mouth unilaterally connected of described main valve (1), be that the A mouth is to the one-way flow of P4 mouth, the B mouth is to the one-way flow of P4 mouth, the oil return inlet T 4 of described the first selector valve takes back fuel tank, the A4 mouth of described the first selector valve is communicated with the control end X2 of described the second cartridge valve, and the B4 mouth of described the first selector valve is communicated with the control end X1 of described the first cartridge valve, the control end X3 of the 3rd cartridge valve simultaneously; The A1 mouth of described the first cartridge valve is communicated with the A mouth of described main valve (1), the A5 mouth of the first fixed displacement motor (3) simultaneously, the B1 mouth of described the first cartridge valve is communicated with the B2 mouth of described the second cartridge valve, the A6 mouth of the second fixed displacement motor (4) simultaneously, the A2 mouth of described the second cartridge valve is communicated with the A3 mouth of the 3rd cartridge valve, the B5 mouth of the first fixed displacement motor (3) simultaneously, and the B3 mouth of described the 3rd cartridge valve is communicated with the B mouth of described main valve (1), the B6 mouth of the second fixed displacement motor (4) simultaneously.
3. the hydraulic system of creeper undercarriage according to claim 2, it is characterized in that, also comprise the hydraulic tensioning oil circuit, described hydraulic tensioning oil circuit comprises the second selector valve (5) and tensioning hydro-cylinder (7), the filler opening while of described the second selector valve (5) and A mouth, the B mouth unilaterally connected of described main valve (1), it is the filler opening one-way flow of A mouth to the second selector valve (5), the filler opening one-way flow of B mouth to the second selector valve (5), the oil outlet of described the second selector valve (5) is communicated with described tensioning hydro-cylinder (7).
4. the hydraulic system of creeper undercarriage according to claim 3 is characterized in that, also is provided with reduction valve (62) and/or relief valve (64) at described the second selector valve (5) to the oil circuit of described tensioning hydro-cylinder (7).
5. the hydraulic system of creeper undercarriage according to claim 3 is characterized in that, also is provided with accumulator (61) at described the second selector valve (5) to the oil circuit of described tensioning hydro-cylinder (7).
6. the hydraulic system of creeper undercarriage according to claim 3, it is characterized in that, also comprise the 3rd selector valve (63) for off-load, the filler opening of described the 3rd selector valve (63) is communicated with the oil outlet of described the second selector valve (5), and the oil outlet of described the 3rd selector valve (63) takes back fuel tank.
7. creeper undercarriage, its either side traveller includes track frame (8) and Idle wheel (9), it is characterized in that, described creeper undercarriage either side traveller is provided with the hydraulic system such as the described creeper undercarriage of claim 1 to 6 any one, wherein, described the first fixed displacement motor (3) and the second fixed displacement motor (4) are separately positioned on the front-end and back-end that this skidding is walked mechanism, described tensioning hydro-cylinder (7) one ends are connected with the track frame (8) that this skidding is walked mechanism, and the other end is connected with the Idle wheel (9) that this skidding is walked mechanism.
8. creeper undercarriage according to claim 7 is characterized in that, also is provided with the clamp (10) for mechanical tensioning between described track frame (8) and described Idle wheel (9).
9. an engineering machinery is characterized in that, described engineering machinery is provided with such as claim 7 or 8 described creepers undercarriage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105628338A CN103062141A (en) | 2012-12-21 | 2012-12-21 | Track traveling mechanism, hydraulic system thereof and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105628338A CN103062141A (en) | 2012-12-21 | 2012-12-21 | Track traveling mechanism, hydraulic system thereof and engineering machinery |
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| CN103062141A true CN103062141A (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105628338A Pending CN103062141A (en) | 2012-12-21 | 2012-12-21 | Track traveling mechanism, hydraulic system thereof and engineering machinery |
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| CN (1) | CN103062141A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343757A (en) * | 2014-10-13 | 2015-02-11 | 浙江三一装备有限公司 | Running gear speed switching control system and engineering machine |
| CN114076126A (en) * | 2021-11-19 | 2022-02-22 | 中国铁建重工集团股份有限公司 | Rotary driving system and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104343757A (en) * | 2014-10-13 | 2015-02-11 | 浙江三一装备有限公司 | Running gear speed switching control system and engineering machine |
| CN114076126A (en) * | 2021-11-19 | 2022-02-22 | 中国铁建重工集团股份有限公司 | Rotary driving system and engineering machinery |
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Application publication date: 20130424 |