CN219240663U - Bulldozer blade hydraulic control system and bulldozer - Google Patents
Bulldozer blade hydraulic control system and bulldozer Download PDFInfo
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- CN219240663U CN219240663U CN202223283337.7U CN202223283337U CN219240663U CN 219240663 U CN219240663 U CN 219240663U CN 202223283337 U CN202223283337 U CN 202223283337U CN 219240663 U CN219240663 U CN 219240663U
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- 239000003921 oil Substances 0.000 claims abstract description 255
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model provides a bulldozer hydraulic control system and a bulldozer, wherein the bulldozer hydraulic control system comprises a plurality of shovel blade oil cylinders, a main oil pump and a quick-descending valve; the plurality of shovel blade oil cylinders are used for driving the bulldozer blade to lift; the main oil pump pumps hydraulic oil to the shovel blade oil cylinder through a pumping oil way and is provided with a first working oil port and a second working oil port; the quick drop valve is arranged on the pumping oil path, one side oil port of the quick drop valve is connected with a rod cavity and a rodless cavity of the scraper knife oil cylinder, and the other side oil port is switched and connected with the first working oil port and the second working oil port. According to the bulldozer hydraulic control system, the plurality of shovel blade oil cylinders share the quick-descending valve, and the oil way is not provided with the oil distributing seat, so that the cost is greatly reduced, and the pipeline distribution is simplified.
Description
Technical Field
The utility model belongs to the technical field of engineering machinery, and particularly relates to a bulldozer and a hydraulic control system of a bulldozer.
Background
Bulldozers are widely used in the engineering field of earth and stone works such as road construction, mining, airport construction, water conservancy and farmland construction. The working device of the bulldozer is mainly a shovel blade which is arranged in front of the whole bulldozer. The scraper knife is lowered and lifted through the action of the oil cylinder, so that the operations of cutting, pushing, leveling and the like of materials are completed. At present, each trolley is provided with two scraper knife oil cylinders, each scraper knife oil cylinder is provided with one quick-descending valve, thus, each trolley is provided with two quick-descending valves, an oil distributing seat is designed in a scraper knife lifting oil path, oil from a working oil tank multi-way valve is distributed to the scraper knife oil cylinders at the left side and the right side, and the arrangement of the control oil path is complex and the cost is higher.
Disclosure of Invention
The utility model mainly aims to provide a bulldozer hydraulic control system and a bulldozer, and aims to solve the technical problems that a control oil circuit of the bulldozer hydraulic control system in the prior art is complex in arrangement and high in cost.
In order to achieve the above object, the present utility model provides a blade hydraulic control system including:
the shovel blade oil cylinders are used for driving the bulldozer blade to lift;
the main oil pump pumps hydraulic oil to the shovel blade oil cylinder through a pumping oil way and is provided with a first working oil port and a second working oil port; and
the quick drop valve is arranged on the pumping oil path, one side oil port of the quick drop valve is connected with a rod cavity and a rodless cavity of the shovel blade oil cylinder, and the other side oil port is switched and connected with the first working oil port and the second working oil port.
In an embodiment of the present utility model, the pumping oil path includes a first working oil path and a second working oil path, the first working oil port is communicated with the first working oil path, the second working oil port is communicated with the second working oil path, and the quick-descent valve includes:
the throttle valve is arranged on the first working oil path, a first side oil port is communicated with the first working oil port of the main oil pump, and a second side oil port of the throttle valve is communicated with a rod cavity of the shovel blade oil cylinder;
the one-way valve is used for communicating the oil inlet with the reversing valve, and the oil outlet is communicated with the second working oil way;
the two ends of the reversing valve are respectively communicated with the two ends of the throttle valve, the reversing valve is provided with a first switching position and a second switching position, and when the reversing valve is switched between the first switching position and the second switching position, the first working oil way and the second working oil way can be controlled to be switched on and off.
In an embodiment of the utility model, the reversing valve is a two-position two-way reversing valve.
In an embodiment of the utility model, the reversing valve includes:
the first side working oil port is communicated with the second side oil port of the throttle valve;
the second side working oil port is communicated with an oil inlet of the one-way valve;
when the reversing valve is positioned at the first switching position, the first side working oil port is communicated with the second side working oil port, and when the reversing valve is positioned at the second switching position, the first side working oil port is disconnected with the second side working oil port.
In an embodiment of the present utility model, the check valve, the throttle valve and the reversing valve are an integrated valve block structure.
In an embodiment of the utility model, the throttle valve is a two-way throttle valve.
In an embodiment of the present utility model, there is also provided a bulldozer comprising a blade and a blade hydraulic control system as described above.
In the embodiment of the utility model, the number of the shovel blade cylinders is two, the shovel blade cylinders are arranged in parallel at intervals, and the driving end of each shovel blade cylinder is connected with the bulldozer blade respectively.
In the embodiment of the utility model, an oil pipe is connected between the two shovel blade oil cylinders, and the quick-descending valve is arranged on the oil pipe.
In an embodiment of the utility model, the bulldozer further comprises a hood located between the two shovel cylinders, the hood comprises a front hood and a middle hood, and the quick-lowering valve is arranged on the inner side wall of the front hood and below the middle hood.
Through the technical scheme, the bulldozer hydraulic control system provided by the embodiment of the utility model has the following beneficial effects:
the main oil pump pumps hydraulic oil to the shovel blade oil cylinder through a pumping oil way and is provided with a first working oil port and a second working oil port; the hydraulic oil pump is characterized in that a quick drop valve is arranged on a pumping oil path, one side oil port of the quick drop valve is connected with a rod cavity and a rodless cavity of a shovel blade oil cylinder, and the other side oil port is switched and connected with a first working oil port and a second working oil port. According to the quick-descending valve for the scraper cylinders, the plurality of scraper cylinders share the quick-descending valve, and the oil way is not provided with the oil distributing seat, so that the cost is greatly reduced, and the pipeline distribution is simplified. And through the switching communication of the other side oil port of the quick drop valve and the first working oil port and the second working oil port, synchronous expansion and contraction of the two shovel blade oil cylinders can be realized, so that the synchronism of driving the shovel blade is ensured.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:
FIG. 1 is a schematic diagram of a hydraulic control system for a blade in accordance with one embodiment of the present utility model;
fig. 2 is a schematic view showing a layout structure of two blade cylinders in a bulldozer according to an embodiment of the present utility model.
Description of the reference numerals
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.
In the prior art, two scraper knife oil cylinders are arranged on each bulldozer, each scraper knife oil cylinder is provided with a quick-descending valve, and an oil distributing seat is arranged in a scraper knife lifting oil path, so that the cost is increased, and the pipeline arrangement is complex; in addition, for the situation that each scraper cylinder is correspondingly provided with a quick-descending valve, when the scraper descends, the quick-descending valves on the two scraper cylinders are possibly inconsistent in opening, so that a certain difference exists between the extension speeds of the piston rods of the two scraper cylinders.
A blade hydraulic control system and a bulldozer according to the present utility model will be described below with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present utility model, there is provided a blade hydraulic control system including:
a plurality of blade cylinders 10 for driving the blade up and down;
the main oil pump pumps hydraulic oil to the shovel blade oil cylinder 10 through a pumping oil way and is provided with a first working oil port B and a second working oil port A; and
the quick drop valve 20 is arranged on the pumping oil path, one side oil port of the quick drop valve 20 is connected with a rod cavity and a rodless cavity of the shovel blade oil cylinder 10, and the other side oil port is switched and connected with the first working oil port B and the second working oil port A.
According to the quick-descending valve, the plurality of shovel blade oil cylinders 10 share the quick-descending valve 20, and the oil way is not provided with the oil distributing seat, so that the cost is greatly reduced, and the pipeline distribution is simplified. And, through the switching intercommunication of the opposite side hydraulic fluid port of quick drop valve 20 and first work hydraulic fluid port B and second work hydraulic fluid port A, can realize the synchronous flexible of two spiller hydro-cylinders 10 to guarantee the synchronism to the drive of spiller.
In the embodiment of the present utility model, the pumping oil path includes a first working oil path L1 and a second working oil path L2, the first working oil path L1 is communicated with the rod cavities of the two scraper cylinders 10 through two first branch oil paths, the second working oil path L2 is communicated with the rod-free cavities of the two scraper cylinders 10 through two second branch oil paths, the first working oil port B is communicated with the first working oil path L1, the second working oil port a is communicated with the second working oil path L2, and the quick-release valve 20 includes:
the throttle valve 21 is arranged on the first working oil way L1, a first side oil port is communicated with a first working oil port B of the main oil pump, and a second side oil port of the throttle valve 21 is communicated with a rod cavity of the scraper knife oil cylinder 10;
the one-way valve 22, the oil inlet and the reversing valve 23 are communicated, and the oil outlet is communicated with the second working oil way L2;
the two ends of the reversing valve 23 are respectively communicated with the two ends of the throttle valve 21, the reversing valve 23 is provided with a first switching position and a second switching position, and when the reversing valve 23 is switched between the first switching position and the second switching position, the first working oil way L1 and the second working oil way L2 can be controlled to be switched on and off.
When the first working oil port B is used for oil feeding and the second working oil port A is used for oil returning, at the moment, the pressure of the first side oil port of the throttle valve 21 is higher than that of the second side oil port, the spring of the reversing valve 23 is in a compressed state, the valve core of the reversing valve 23 is positioned at a second switching position below, the first working oil way L1 and the second working oil way L2 are disconnected, and the first working oil way L1 is used for oil feeding and the second working oil way L2 is used for oil returning; when the first working oil port B returns oil and the second working oil port A returns oil, the pressure of the first side oil port of the throttle valve 21 is lower than that of the second side oil port, the spring of the reversing valve 23 is in an extending state, the valve core of the reversing valve 23 is positioned at a first switching position above, the first working oil way L1 is communicated with the second working oil way L2, and part of hydraulic oil returning from the first working oil way L1 can enter the second working oil way L2 to feed oil to the rodless cavity again, so that oil supply and circulation are realized.
In the embodiment of the present utility model, the reversing valve 23 is a two-position two-way reversing valve, specifically, the two-position two-way reversing valve includes:
a first side working oil port B1 which communicates with a second side oil port of the throttle valve 21;
the second side working oil port A1 is communicated with an oil inlet of the one-way valve 22;
when the reversing valve 23 is positioned at the first switching position, the first side working oil port B1 and the second side working oil port A1 are communicated, and when the reversing valve 23 is positioned at the second switching position, the first side working oil port B1 and the second side working oil port A1 are disconnected.
Oil flow direction when the shovel blade is lifted: hydraulic oil pumped from the main oil pump flows to the throttle valve 21 of the quick-descent valve 20 through the first working oil port B; then, the hydraulic oil flows from the first working oil way L1 to rod cavities of the two shovel blade oil cylinders 10 on the left side and the right side respectively, so that the rod cavities of the shovel blade oil cylinders 10 on the left side and the shovel blade oil cylinders 10 on the right side are simultaneously filled with oil, hydraulic oil in the rod cavities of the two shovel blade oil cylinders 10 without the rod cavities returns through the second working oil way L2, and piston rods of the shovel blade oil cylinders 10 on the left side and the shovel blade oil cylinders 10 on the right side retract to realize lifting of the shovel blade.
Oil flow direction when the shovel blade descends: due to the influence of dead weight of the shovel blade, the extension of the piston rod of the shovel blade oil cylinder 10 is accelerated in the descending process, so that the rodless cavity is not filled with hydraulic oil, and a cavity is formed in the rodless cavity; when the rod cavity is used for oil return and the rodless cavity is used for oil inlet, hydraulic oil flows to the first side oil port through the second side oil port of the throttle valve 21 and flows back to the first working oil port B from the first side oil port, at the moment, the pressure of the second side oil port of the throttle valve 21 is larger than that of the first side oil port, so that a spring on the reversing valve 23 is driven to stretch, and the two-position two-way reversing valve 23 is switched to a first switching position above, so that the rod cavity and the rodless cavity of the scraper knife oil cylinder 10 are communicated: oil from the working oil tank multi-way valve and oil supplied from the first working oil way L1 flow into rodless cavities of the two scraper knife oil cylinders 10 respectively and simultaneously from the second working oil port A through the second working oil way L2, namely the scraper knife oil cylinder 10 on the left side and the rodless cavity of the scraper knife oil cylinder 10 on the right side are used for oil feeding simultaneously; that is, a part of the hydraulic oil flowing back from the rod chamber of the blade cylinder 10 flows back into the first working oil port B of the main oil pump, and the other part flows back to the second working oil path L2 through the reversing valve 23 and the check valve 22, that is: the hydraulic oil flowing back from the rod cavity can supply the second working oil way L2, and the hydraulic oil flowing back from the rod cavity and the hydraulic oil pumped from the second working oil port A of the main oil pump simultaneously supply oil to the rod-free cavity of the shovel blade oil cylinder 10, so that the cavity part of the rod-free cavity can be filled to meet the requirement of the shovel blade descending.
Specifically, the hydraulic oil circulation process when the shovel blade descends is as follows: the oil in the rod cavity of the left scraper cylinder 10 flows back to the main oil pump from one part of the first working oil path L1 through the throttle valve 21, and the other part flows to the throttle valve 21 from the first working oil port B1 of the reversing valve 23 and enters the second working oil path L2; meanwhile, the oil in the rod cavity of the right scraper cylinder 10 flows back to the main oil pump from a part of the throttle valve 21 of the first working oil path L1, and the other part of the oil also flows to the throttle valve 21 from the first side working oil port B1 of the reversing valve 23 to enter the second working oil path L2, and after the oil return in the rod cavity of the left scraper cylinder 10 and the right scraper cylinder 10 are converged, the oil flows to the rodless cavity of the left scraper cylinder 10 and the right scraper cylinder 10 through the reversing valve 23 and the one-way valve 22, so that the extension speed of the piston rod of the scraper cylinder 10 is accelerated, and the efficiency is improved.
In order to reduce the cost and simplify the structural form of the whole pipeline, the check valve 22, the throttle valve 21 and the reversing valve 23 are arranged into an integrated valve group structure.
Since the direction change of the direction change valve 23 is controlled by the pressure on both sides of the throttle valve 21, the throttle valve 21 is required to regulate the pressure and drive the direction change valve 23 to change the direction no matter the first working oil path L1 is the oil intake or the oil return, and the throttle valve 21 is preferably a two-way throttle valve.
In the embodiment of the present utility model, a bulldozer is further provided, which includes a blade and the blade hydraulic control system described above, and since the bulldozer includes all the embodiments of the blade hydraulic control system described above, the bulldozer has all the advantages brought by the blade hydraulic control system described above, and will not be described in detail herein.
As shown in fig. 2, the number of the shovel cylinders 10 is two, and the shovel cylinders 10 are arranged at intervals in parallel, the driving end of each shovel cylinder 10 is connected with a bulldozer respectively, and the two shovel cylinders 10 are arranged left and right respectively, and since one quick-lowering valve 20 is adopted to act on the two shovel cylinders 10 at the same time, the two shovel cylinders 10 can act simultaneously, the acting forces at the left end and the right end of the shovel are ensured to be consistent, and the lifting stability of the shovel is improved. And, this application is through saving the branch oil stand among the prior art, is connected with oil pipe 30 between two spiller hydro-cylinders 10, directly locates quick-descent valve 20 on oil pipe 30, and the pipeline is arranged simply, the cost is reduced.
In an embodiment of the present utility model, the bulldozer further comprises a hood located between the two blade cylinders 10, the hood comprising a front hood and a middle hood, and the quick-release valve 20 is provided on the inner side wall of the front hood and below the middle hood.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (10)
1. A blade hydraulic control system, comprising:
a plurality of shovel blade cylinders (10) for driving the blade to rise and fall;
the main oil pump pumps hydraulic oil to the shovel blade oil cylinder (10) through a pumping oil way and is provided with a first working oil port (B) and a second working oil port (A); and
the quick-descending valve (20) is arranged on the pumping oil path, one side oil port of the quick-descending valve (20) is connected with a rod cavity and a rodless cavity of the shovel blade oil cylinder (10), and the other side oil port is switched and connected with the first working oil port (B) and the second working oil port (A).
2. The blade hydraulic control system according to claim 1, wherein the pumping oil passage includes a first working oil passage (L1) and a second working oil passage (L2), the first working oil port (B) communicates with the first working oil passage (L1), the second working oil port (a) communicates with the second working oil passage (L2), and the quick-descent valve (20) includes:
the throttle valve (21) is arranged on the first working oil way (L1) and is communicated with the first working oil port (B) of the main oil pump, and the second side oil port of the throttle valve (21) is communicated with the rod cavity of the shovel oil cylinder (10);
the two ends of the reversing valve (23) are respectively communicated with the two ends of the throttle valve (21), the reversing valve (23) is provided with a first switching position and a second switching position, and when the reversing valve (23) is switched between the first switching position and the second switching position, the first working oil way (L1) and the second working oil way (L2) can be controlled to be switched on and off;
the one-way valve (22), the oil inlet and the reversing valve (23) are communicated, and the oil outlet is communicated with the second working oil way (L2).
3. A blade hydraulic control system according to claim 2, characterized in that the reversing valve (23) is a two-position two-way reversing valve.
4. A blade hydraulic control system according to claim 3, characterized in that the reversing valve (23) comprises:
a first side working oil port (B1) communicated with a second side oil port of the throttle valve (21);
the second side working oil port (A1) is communicated with an oil inlet of the one-way valve (22);
when the reversing valve (23) is positioned at the first switching position, the first side working oil port (B1) is communicated with the second side working oil port (A1), and when the reversing valve (23) is positioned at the second switching position, the first side working oil port (B1) is disconnected with the second side working oil port (A1).
5. The blade hydraulic control system according to claim 2, characterized in that the non-return valve (22), the throttle valve (21) and the reversing valve (23) are of an integrated valve block structure.
6. A blade hydraulic control system according to claim 2, characterized in that the throttle (21) is a two-way throttle.
7. A bulldozer comprising a blade and a blade hydraulic control system according to any one of claims 1 to 6.
8. Bulldozer according to claim 7, in which said number of blade cylinders (10) is two and arranged in parallel and spaced apart relationship, the driving end of each blade cylinder (10) being connected to the blade respectively.
9. Bulldozer according to claim 8, in which an oil pipe (30) is connected between two of said blade cylinders (10), said quick-lowering valve (20) being provided on said oil pipe (30).
10. The bulldozer according to claim 7, further comprising a hood located between two of said blade cylinders (10), said hood comprising a front hood and a middle hood, said quick-lowering valve (20) being provided on an inside wall of said front hood and below said middle hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223283337.7U CN219240663U (en) | 2022-12-07 | 2022-12-07 | Bulldozer blade hydraulic control system and bulldozer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223283337.7U CN219240663U (en) | 2022-12-07 | 2022-12-07 | Bulldozer blade hydraulic control system and bulldozer |
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| Publication Number | Publication Date |
|---|---|
| CN219240663U true CN219240663U (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223283337.7U Active CN219240663U (en) | 2022-12-07 | 2022-12-07 | Bulldozer blade hydraulic control system and bulldozer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219240663U (en) |
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2022
- 2022-12-07 CN CN202223283337.7U patent/CN219240663U/en active Active
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