CN210621812U - Excavator swing arm descending hydraulic control system and excavator - Google Patents
Excavator swing arm descending hydraulic control system and excavator Download PDFInfo
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- CN210621812U CN210621812U CN201921166030.4U CN201921166030U CN210621812U CN 210621812 U CN210621812 U CN 210621812U CN 201921166030 U CN201921166030 U CN 201921166030U CN 210621812 U CN210621812 U CN 210621812U
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Abstract
The utility model provides an excavator swing arm decline hydraulic control system and excavator belongs to excavator hydraulic pressure oil circuit technical field. The hydraulic control system for descending of the movable arm of the excavator comprises a hydraulic pump, a movable arm valve core, a movable arm oil cylinder, a main oil return pipeline, a bucket rod valve core, a bucket rod oil cylinder, a retaining valve and a three-position four-way direction control valve; the hydraulic pump is connected with a movable arm valve core, a bucket rod valve core, a movable arm oil cylinder, a bucket rod oil cylinder and a main oil return pipeline through pipelines; the holding valve and the three-position four-way direction control valve are connected with the movable arm oil cylinder, the bucket rod valve core and the main oil return pipeline through pipelines. The utility model has the advantages that: on the premise of not influencing other actions of the excavator, when the composite action of 'arm descending arm excavation' and 'arm descending arm eversion' is carried out, the power loss of the excavator is reduced to reduce the fuel consumption rate, and the work efficiency of the excavator is improved while the power loss of the excavator is reduced.
Description
Technical Field
The utility model relates to an excavator hydraulic pressure oil circuit technical field especially relates to an excavator swing arm descends hydraulic control system and excavator.
Background
Energy problems have risen to the high level of national security strategy, and a series of global environmental problems caused by energy production and use have also received general attention from countries all over the world. Energy saving, energy efficiency improvement, etc. would be effective countermeasures to solve this series of problems. The market competition of the excavator is intensified day by day, the operating requirements of customers on the excavator are higher and higher, the work efficiency is high, and the fuel consumption rate is low, which are the goals of pursuing the diligence.
At present, the energy-saving technology research and application of excavator energy recovery mainly recovers the potential energy of a movable arm of an excavator and the rotary braking energy, stores the recovered energy through an energy accumulator, and then releases the energy to supply other actions. Thus, although power loss can be reduced to some extent, reducing the specific fuel consumption, power loss occurs during energy storage and re-release; moreover, the working efficiency of excavation is not obviously changed; in addition, the existing energy recovery system with the energy accumulator for storage has the disadvantages of complex structure, high cost and difficulty in popularization and application.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an excavator swing arm descends hydraulic control system and excavator solves the technical problem of "improve the work efficiency of excavator when reducing excavator power loss".
The utility model provides a hydraulic control system for descending of a movable arm of an excavator, which comprises a hydraulic pump, a movable arm valve core, a movable arm oil cylinder, a main oil return pipeline, a bucket rod valve core, a bucket rod oil cylinder, a retaining valve and a three-position four-way directional control valve; the hydraulic pump is connected with an oil inlet of a movable arm valve core through a first main oil inlet pipeline, the movable arm valve core is connected with a rod cavity of a movable arm oil cylinder through a first hydraulic pipeline, a rodless cavity of the movable arm oil cylinder is connected with the movable arm valve core through a second hydraulic pipeline, an oil outlet of the movable arm valve core is connected with a main oil return pipeline, and the movable arm valve core is connected with a movable arm ascending pilot oil way and a movable arm descending pilot oil way; the hydraulic pump is connected with an oil inlet of the bucket rod valve core through a second main oil inlet pipeline, a third hydraulic pipeline of the bucket rod valve core is connected with a rodless cavity of the bucket rod oil cylinder, a rod cavity of the bucket rod oil cylinder is connected with the bucket rod valve core through a fourth hydraulic pipeline, an oil outlet of the bucket rod valve core is connected with a main oil return pipeline, and the bucket rod valve core is connected with a bucket rod excavating pilot oil way and a bucket rod outwards-turning pilot oil way; the boom-free cavity of the boom cylinder is connected with an oil inlet of the holding valve through a first adjusting pipeline, an oil outlet of the holding valve is connected with a first oil port of the three-position four-way directional control valve through a second adjusting pipeline, a second oil port of the three-position four-way directional control valve is connected with an oil inlet of the bucket rod valve core through a third adjusting pipeline, a third oil port of the three-position four-way directional control valve is connected with the boom-free cavity of the bucket rod cylinder through a fourth adjusting pipeline, a fourth oil port of the three-position four-way directional control valve is connected with a main oil return pipeline through a fifth adjusting pipeline, the holding valve is connected with a boom descending pilot oil way, and the three-position four-way directional control valve is connected with a boom.
Furthermore, the hydraulic pump includes preceding pump and back pump, and first main oil inlet pipe way is connected to preceding pump, and the second main oil inlet pipe way is connected to the back pump.
Further, the movable arm valve core and the bucket rod valve core are integrated on the first valve seat.
Further, the holding valve and the three-position, four-way directional control valve are integrated on a second valve seat.
Further, the second valve seat is fitted on the first valve seat.
Furthermore, a check valve is arranged on the first main oil inlet pipeline.
Furthermore, a check valve is arranged on the second main oil inlet pipeline.
Furthermore, a check valve is arranged on the third adjusting pipeline.
The utility model also provides an excavator, including foretell excavator swing arm decline hydraulic control system.
Compared with the prior art, the utility model discloses an excavator swing arm descends hydraulic control system and excavator has following characteristics and advantage:
the utility model discloses an excavator swing arm descends hydraulic control system, with its application in the excavator, do not change the internal structure of main valve (swing arm case, dipper case are integrated and are formed on first disk seat), directly install additional valve (keep valve, tribit four-way directional control valve is integrated and are formed on the second disk seat) additional on the main valve and cooperate five regulation pipelines to realize, the structure is simpler, the transformation cost is lower, can popularize and apply; on the premise of not influencing other actions of the excavator, when the composite action of 'arm descending arm excavation' and 'arm descending arm eversion' is carried out, the power loss of the excavator is reduced to reduce the fuel consumption rate, and the work efficiency of the excavator is improved while the power loss of the excavator is reduced.
After reading the detailed description of the present invention in conjunction with the drawings, the features and advantages of the present invention will become more apparent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a hydraulic control system for lowering a movable arm of an excavator according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the present embodiment provides a hydraulic control system for lowering a boom of an excavator, which includes a hydraulic pump 1, a boom spool 21, a boom cylinder 3, a main return line 53, an arm spool 22, an arm cylinder 4, a holding valve 61, a three-position four-way directional control valve 62, and a matched hydraulic line.
The hydraulic pump 1 includes a front pump 11 and a rear pump 12. The hydraulic pump 1 drives hydraulic oil in the oil tank to enter the boom cylinder 3 and the arm cylinder 4 through the boom spool 21 and the arm spool 22 on the main valve 2, respectively.
The front pump 11 is connected with an oil inlet of a movable arm valve core 21 through a first main oil inlet pipeline 51, a one-way valve is arranged on the first main oil inlet pipeline 51, the movable arm valve core 21 is connected with a rod cavity of a movable arm oil cylinder 3 through a first hydraulic pipeline 71, a rodless cavity of the movable arm oil cylinder 3 is connected with the movable arm valve core 21 through a second hydraulic pipeline 72, and an oil outlet of the movable arm valve core 21 is connected with a main oil return pipeline 53. A boom-up pilot oil passage and a boom-down pilot oil passage are connected to the boom spool 21.
The rear pump 12 is connected with an oil inlet of the bucket rod valve core 22 through a second main oil inlet pipeline 52, a one-way valve is arranged on the second main oil inlet pipeline 52, the bucket rod valve core 22 is connected with a rodless cavity of the bucket rod oil cylinder 4 through a third hydraulic pipeline 73, a rod cavity of the bucket rod oil cylinder 4 is connected with the bucket rod valve core 22 through a fourth hydraulic pipeline 74, and an oil outlet of the bucket rod valve core 22 is connected with a main oil return pipeline 53. The arm spool 22 is connected to an arm excavation pilot oil passage and an arm eversion pilot oil passage.
The rodless cavity of the boom cylinder 3 is connected with the oil inlet of the holding valve 61 through a first adjusting pipeline 81, the oil outlet of the holding valve 61 is connected with the first oil port of the three-position four-way directional control valve 62 through a second adjusting pipeline 82, the second oil port of the three-position four-way directional control valve 62 is connected with the oil inlet of the bucket rod valve core 22 through a third adjusting pipeline 83, a check valve is arranged on the third adjusting pipeline 83, the third oil port of the three-position four-way directional control valve 62 is connected with the rodless cavity of the bucket rod cylinder 4 through a fourth adjusting pipeline 84, and the fourth oil port of the three-position four-way directional control valve 62 is connected with the main oil return pipeline 53 through a fifth adjusting pipeline. In the three-position four-way directional control valve 62, when the valve core is in the middle position, all oil ports are cut off; when the valve core is in the left position, the first oil port is communicated with the second oil port; when the valve core is in the right position, the first oil port is communicated with the second oil port, and the third oil port is communicated with the fourth oil port.
The holding valve 61 is connected to a boom lowering pilot oil passage, and the three-position four-way directional control valve 62 is connected to a boom lowering arm excavation pilot oil passage and a boom lowering arm everting pilot oil passage.
In the present embodiment, the boom spool 21 and the arm spool 22 are integrated with the first valve seat to form the main valve 2, the holding valve 61 and the three-position four-way directional control valve 62 are integrated with the second valve seat to form the additional valve 6, and the second valve seat is assembled with the first valve seat. In this embodiment, the internal structure of the main valve 2 (the existing component of the excavator) is not changed, the additional valve 6 is directly additionally installed on the main valve 2 and is matched with five adjusting pipelines (the first adjusting pipeline 81, the second adjusting pipeline 82, the third adjusting pipeline 83, the fourth adjusting pipeline 84 and the fifth adjusting pipeline 85), so that the method can be realized, the structure is simple, the modification cost is low, and the method can be popularized and applied.
The embodiment also provides an excavator, which comprises the excavator boom descending hydraulic control system.
The operation of the hydraulic control system for lowering the boom of the excavator according to the present embodiment is as follows.
Digging with movable arm and descending bucket rod
When the boom is lowered and the arm is excavated in a linkage operation, a boom lowering arm excavation pilot oil path transmits a signal to the three-position four-way direction control valve 62, a spool of the three-position four-way direction control valve 62 is switched to the left position, a boom lowering pilot oil path transmits a signal to the holding valve 61, the holding valve 61 is opened, the boom lowering pilot oil path transmits a signal to the boom spool 21, the boom spool 21 is switched to the right position, the arm excavation pilot oil path transmits a signal to the arm spool 22, and the arm spool 22 is switched to the right position. At this time, a part of the oil in the rodless cavity of the boom cylinder 3 enters the boom spool 21 through the second hydraulic line 72, continues to flow back to the oil tank through the main return line 53, and the other part of the oil reaches the oil inlet of the arm spool 22 through the first adjusting line 81, the holding valve 61, the second adjusting line 82, the three-position four-way directional control valve 62, and the third adjusting line 83, and enters the rodless cavity of the arm cylinder 4 through the third hydraulic line 73, so that the telescopic rod of the arm cylinder 4 extends at a higher speed, and the arm excavating speed is increased.
(II) turning-over of boom descending bucket rod
When the movable arm descends and the arm everts in linkage operation, a movable arm descending arm everting pilot oil circuit transmits a signal to the three-position four-way direction control valve 62, the valve core of the three-position four-way direction control valve 62 is switched to the right position, the movable arm descending pilot oil circuit transmits a signal to the holding valve 61, the holding valve 61 is opened, the movable arm descending pilot oil circuit transmits a signal to the movable arm valve core 21, the movable arm valve core 21 is switched to the right position, the arm everting pilot oil circuit transmits a signal to the arm valve core 22, and the arm valve core 22 is switched to the left position. At this time, a part of oil in the rodless cavity of the boom cylinder 3 enters the boom valve core 21 through the second hydraulic pipeline 72, continues to flow back to the oil tank through the main oil return pipeline 53, and the other part of oil reaches the oil inlet of the arm valve core 22 through the first adjusting pipeline 81, the holding valve 61, the second adjusting pipeline 82, the three-position four-way directional control valve 62 and the third adjusting pipeline 83, and continues to enter the rod cavity of the arm cylinder 4 through the fourth hydraulic pipeline 74, so that the telescopic rod of the arm cylinder 4 is contracted at a higher speed; meanwhile, one part of oil in the rodless cavity of the arm cylinder 4 enters the main oil return pipeline 53 through the third hydraulic pipeline 73 and the oil outlet of the arm spool 22 and flows back to the oil tank, the other part of oil enters the three-position four-way directional control valve 62 through the fourth adjusting pipeline 84 and flows back to the oil tank through the fifth adjusting pipeline 85 and the main oil return pipeline 53, so that the oil return back pressure on one side of the rodless cavity of the arm cylinder 4 is reduced, the contraction speed of the telescopic rod of the arm cylinder 4 is further increased, and the everting speed of the arm is increased.
The excavator boom lowering hydraulic control system of the embodiment is applied to an excavator, and reduces power loss of the excavator to reduce fuel consumption rate and improve work efficiency of the excavator while reducing power loss of the excavator without affecting other actions of the excavator in a combined action of 'boom lowering arm excavating' and 'boom lowering arm everting'.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (9)
1. The utility model provides an excavator swing arm decline hydraulic control system which characterized in that: the hydraulic control system comprises a hydraulic pump, a movable arm valve core, a movable arm oil cylinder, a main oil return pipeline, a bucket rod valve core, a bucket rod oil cylinder, a holding valve and a three-position four-way direction control valve; the hydraulic pump is connected with an oil inlet of a movable arm valve core through a first main oil inlet pipeline, the movable arm valve core is connected with a rod cavity of a movable arm oil cylinder through a first hydraulic pipeline, a rodless cavity of the movable arm oil cylinder is connected with the movable arm valve core through a second hydraulic pipeline, an oil outlet of the movable arm valve core is connected with a main oil return pipeline, and the movable arm valve core is connected with a movable arm ascending pilot oil way and a movable arm descending pilot oil way; the hydraulic pump is connected with an oil inlet of the bucket rod valve core through a second main oil inlet pipeline, a third hydraulic pipeline of the bucket rod valve core is connected with a rodless cavity of the bucket rod oil cylinder, a rod cavity of the bucket rod oil cylinder is connected with the bucket rod valve core through a fourth hydraulic pipeline, an oil outlet of the bucket rod valve core is connected with a main oil return pipeline, and the bucket rod valve core is connected with a bucket rod excavating pilot oil way and a bucket rod outwards-turning pilot oil way; the boom-free cavity of the boom cylinder is connected with an oil inlet of the holding valve through a first adjusting pipeline, an oil outlet of the holding valve is connected with a first oil port of the three-position four-way directional control valve through a second adjusting pipeline, a second oil port of the three-position four-way directional control valve is connected with an oil inlet of the bucket rod valve core through a third adjusting pipeline, a third oil port of the three-position four-way directional control valve is connected with the boom-free cavity of the bucket rod cylinder through a fourth adjusting pipeline, a fourth oil port of the three-position four-way directional control valve is connected with a main oil return pipeline through a fifth adjusting pipeline, the holding valve is connected with a boom descending pilot oil way, and the three-position four-way directional control valve is connected with a boom.
2. The excavator boom-lowering hydraulic control system according to claim 1, wherein: the hydraulic pump comprises a front pump and a rear pump, the front pump is connected with a first main oil inlet pipeline, and the rear pump is connected with a second main oil inlet pipeline.
3. The excavator boom-lowering hydraulic control system according to claim 1, wherein: and the movable arm valve core and the bucket rod valve core are integrated on the first valve seat.
4. The excavator boom lowering hydraulic control system of claim 3, wherein: the holding valve and the three-position four-way directional control valve are integrated on the second valve seat.
5. The excavator boom lowering hydraulic control system according to claim 4, wherein: the second valve seat is fitted on the first valve seat.
6. The excavator boom-lowering hydraulic control system according to claim 1, wherein: and the first main oil inlet pipeline is provided with a one-way valve.
7. The excavator boom-lowering hydraulic control system according to claim 1, wherein: and a check valve is arranged on the second main oil inlet pipeline.
8. The excavator boom-lowering hydraulic control system according to claim 1, wherein: and a check valve is arranged on the third adjusting pipeline.
9. An excavator characterized by comprising the excavator boom-lowering hydraulic control system according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166030.4U CN210621812U (en) | 2019-07-24 | 2019-07-24 | Excavator swing arm descending hydraulic control system and excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166030.4U CN210621812U (en) | 2019-07-24 | 2019-07-24 | Excavator swing arm descending hydraulic control system and excavator |
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| CN210621812U true CN210621812U (en) | 2020-05-26 |
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| CN201921166030.4U Active CN210621812U (en) | 2019-07-24 | 2019-07-24 | Excavator swing arm descending hydraulic control system and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359516A (en) * | 2019-07-24 | 2019-10-22 | 青岛雷沃工程机械有限公司 | Descending movable arm of excavator hydraulic control system and excavator |
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2019
- 2019-07-24 CN CN201921166030.4U patent/CN210621812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359516A (en) * | 2019-07-24 | 2019-10-22 | 青岛雷沃工程机械有限公司 | Descending movable arm of excavator hydraulic control system and excavator |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: LOVOL Engineering Machinery Group Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |