CN2851674Y - Proportional pilot hydraulic control system for small-sized radial wheel type excavator - Google Patents
Proportional pilot hydraulic control system for small-sized radial wheel type excavator Download PDFInfo
- Publication number
- CN2851674Y CN2851674Y CN 200520124385 CN200520124385U CN2851674Y CN 2851674 Y CN2851674 Y CN 2851674Y CN 200520124385 CN200520124385 CN 200520124385 CN 200520124385 U CN200520124385 U CN 200520124385U CN 2851674 Y CN2851674 Y CN 2851674Y
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- pilot
- control
- pilot valve
- valve group
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- Expired - Fee Related
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Abstract
The utility model relates to a proportional pilot hydraulic control system for a small-sized radial wheel type excavator, which belongs to the field of hydraulic control. The utility model solves the problems of operating intensity and working safety of the excavator. One end of a hydraulic pump is communicated with an oil tank through pipelines, and the other end is communicated with two parallel pilot valve units which are controlled by a left handle and a right handle. A lead spill pressure control valve is connected in series among the hydraulic pump and the pilot valve units. Two of the four pilot valves of the pilot valve unit which is controlled by the left handle are communicated with both ends of the right and left rotating control valve of a main arm. Other two are communicated with both ends of the clamshell excavator stretching and bending control valve. Two of four pilot valves of the pilot valve unit which is controlled by the right handle are communicated with the stretching and bending control valve of the auxiliary arm while other two are communicated to the lifting control valve of the main arm. The oil return pipes of the pilot valve units which are controlled by the left handle and the right handle are communicated with a main oil return pipe. The system is laborsaving, oilsaving and timesaving. The utility model enhances the digging efficiency and guarantees the working safety at the same time. The system is appropriate for the small-sized radius wheel excavator.
Description
Technical field
The utility model relates to a kind of hydraulic control system of small-sized radius wheel excavator.
Background technique
The domestic fixed hydraulic control system of excavator of small-sized operator cabin all is a direct control type at present, promptly directly control the switching and the commutation of main valve by handle by the driver, because the action of being controlled is many, handle is also many, be difficult to control simultaneously with a hand difference action of two handles, causative action is discontinuous, and efficiency is low, labor intensity is big, same workload excessive fuel consumption, time-consuming.In addition, owing to be direct control, when the bucket machine was in high-order the parking, if there is the people to pull handle, bucket will be descending from eminence, and major accident, poor stability take place sometimes.
Summary of the invention
The purpose of this utility model is to overcome the problem that above-mentioned prior art exists, and a kind of proportion pilot hydraulic control system of small-sized radius wheel excavator is provided, fuel-efficient to realize, save time, target that Security is good.
The technical solution of the utility model is: the proportion pilot hydraulic control system of the small-sized radius wheel excavator of this kind, it is characterized in that, one oil hydraulic pump, one end is by the pipeline connection fuel tank, the other end is communicated with the pilot valve group of two left handles controls arranged side by side and the pilot valve group of right handles control, is serially connected with the guide's overflow pressure-limit valve that is connected with total return tube between oil hydraulic pump and pilot valve group; Two two ends that are communicated with principal arm left and right sides rotary control valve in four pilot valves of the pilot valve group of left handle control, two are communicated with the two ends that bucket bends and stretches control valve in addition; In four pilot valves of the pilot valve group of right handles control two be communicated with auxiliary bend and stretch control valve, in addition two be communicated with the principal arm lift controil valves, the return tube of the pilot valve group of the pilot valve group of left handle control and right handles control is communicated with total return tube.
Because the used hydraulic coupling of hydraulic coupling that proportion pilot is required and master cylinder has bigger difference, one of a newly-increased low pressure (0.18-0.35Mpa) small flow (6L/min) oil hydraulic pump of the utility model, this pump is by engine-driving, the low pressure oil that this pump pumps is after the relief valve pressure limiting, directly enter eight pilot valves, each 4 is one group about this pilot valve, and every group by a handle control.Like this, the driver just can control eight actions of often using with two hands, and for example: revolution about the Qu Yushen of left hand control bucket and principal arm, the right hand are controlled the liter of principal arm and fallen Qu Yushen with auxiliary.Because Joystick has adopted the swing type all around that resembles the game pad sample, so driver's both hands can be finished any four in eight actions simultaneously, makes the action continization, has improved control efficiency.These small-sized radius wheel excavator revolution number of degrees are 180 degree.
The beneficial effects of the utility model are: by said structure, the convenience that has realized operation with lightly make action continuously freely, laborsaving, fuel-efficient, save time, improved digging efficiency.Guaranteed safety simultaneously.This system at first is applied on the fixed excavator of the small-sized operator cabin of " Shandong ox " board of our factory's production at home, do the performance comparison experiment with " Shandong ox board " product of the same specification of not using this technology, can improve digging efficiency more than 50% (former machine 70m3/ hour, new machine 110m3/ hour).Favorable economic benefit is arranged.Simultaneously, new machine when the bucket place is high-order, is pulled handle at engine misses howsoever, and bucket can not fall, and Security is preferably arranged.
Description of drawings
Describe below in conjunction with accompanying drawing,
Figure is a proportion pilot control section schematic diagram of the present utility model.
Among the figure: 1. fuel tank, 2. guide's oil pump, 3. guide's overflow pressure-limit valve, 4. the pilot valve group of right handles control, 5. the pilot valve group of left handle control, 6. principal arm left and right sides rotary control valve, 7. bucket bends and stretches control valve, and 8. auxiliary bends and stretches control valve, 9. the principal arm lift controil valve, 10. fuel supply line, 11. return tubes.
Embodiment
Bottom in conjunction with the accompanying drawings, figure is a proportion pilot control section schematic diagram of the present utility model.
Only show the proportion pilot control section among the figure, to major loop, owing to be routine techniques, so omit.
The proportion pilot hydraulic control system of the small-sized radius wheel excavator of this kind, one oil hydraulic pump, 2 one ends are communicated with fuel tank 1 by oil feed line 10, the other end is communicated with the pilot valve group 5 of two left handles controls arranged side by side and the pilot valve group 4 of right handles control, is serially connected with the guide's overflow pressure-limit valve 3 that is connected with total return tube between oil hydraulic pump 2 and pilot valve group.Two two ends that are communicated with principal arm left and right sides rotary control valve 6 in four pilot valves of the pilot valve group 5 of left handle control, two are communicated with the two ends that bucket bends and stretches control valve 7 in addition.In four pilot valves of the pilot valve group 4 of right handles control two be communicated with auxiliary bend and stretch control valve 8, in addition two be communicated with principal arm lift controil valves 9.The return tube of the pilot valve group 4 of the pilot valve group 5 of left handle control and right handles control is communicated with total return tube 11.
When engine revolution, guide's oil pump 2 is rotation thereupon also, guide's overflow pressure-limit valve 3 is limited in oil pressure under the 0.35Mpa, unnecessary oil is got back to fuel tank 1 by total return tube 11, when driver's right hand forward during driving handle, two valves in top of the pilot valve group 4 of right handles control are opened simultaneously, low pressure oil enters the rear that auxiliary bends and stretches control valve 8 and principal arm lift controil valve 9, its internal piston is moved forward, the main valve that auxiliary bends and stretches control valve 8 and principal arm lift controil valve 9 is introduced principal arm and auxiliary master cylinder rear portion with the oil of high-pressure high-flow, causes that principal arm and auxiliary hoist simultaneously and stretch.
When the motionless handle of driver's hand, all valves of pilot valve group are all closed under the effect of spring, and four control valves 6,7,8,9 are all got back to intermediate stop position, and handle is also got back to the neutral position, and each oil cylinder all is failure to actuate.
When the driver pulled back right handles, action was with above-mentioned opposite, and it is in the wrong that principal arm descends, auxiliary is curled up, and when the driver pulled right handles to the right, principal arm rose, and auxiliary is curled, and principal arm descends when pulling left, and auxiliary stretches simultaneously.When the driver pulls to oblique side, then has only an arm action.
When the driver pulls back left handle, because the pilot valve group 5 of left handle control is installed by all around arranging, have only this moment the pilot valve in back to connect, and low pressure oil can be introduced the place ahead that bucket bends and stretches control valve 7, the piston of this control valve inside moves backward, and the action that causes is to have only curling of bucket.
When the driver pushed away left handle forward, action was with above-mentioned just in time opposite, and bucket will stretch.
The driver when left is pulled, can cause principal arm to the left horizontal rotation with left handle, and when right-hand pulling, principal arm when tilted direction is pulled, then has two actions to right-hand rotation simultaneously.
Claims (1)
1, a kind of proportion pilot hydraulic control system of small-sized radius wheel excavator, it is characterized in that, one oil hydraulic pump (2) one ends are by pipeline connection fuel tank (1), the other end is communicated with the pilot valve group (5) of two left handles controls arranged side by side and the pilot valve group (4) of right handles control, is serially connected with the guide's overflow pressure-limit valve (3) that is connected with total return tube between oil hydraulic pump (2) and pilot valve group; Two two ends that are communicated with principal arm left and right sides rotary control valve (6) in four pilot valves of the pilot valve group (5) of left handle control, two are communicated with the two ends that bucket bends and stretches control valve (7) in addition; In four pilot valves of the pilot valve group (4) of right handles control two be communicated with auxiliary bend and stretch control valve (8), in addition two be communicated with principal arm lift controil valves (9), the return tube of the pilot valve group (4) of the pilot valve group (5) of left handle control and right handles control is communicated with total return tube (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520124385 CN2851674Y (en) | 2005-11-11 | 2005-11-11 | Proportional pilot hydraulic control system for small-sized radial wheel type excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520124385 CN2851674Y (en) | 2005-11-11 | 2005-11-11 | Proportional pilot hydraulic control system for small-sized radial wheel type excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2851674Y true CN2851674Y (en) | 2006-12-27 |
Family
ID=37585631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520124385 Expired - Fee Related CN2851674Y (en) | 2005-11-11 | 2005-11-11 | Proportional pilot hydraulic control system for small-sized radial wheel type excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2851674Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155030A (en) * | 2011-05-12 | 2011-08-17 | 北京建研机械科技有限公司 | Excavator for top excavation |
| CN102304934A (en) * | 2011-06-27 | 2012-01-04 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN103452960A (en) * | 2012-06-04 | 2013-12-18 | 利勃海尔法国有限公司 | Hydraulic system and pressure limiting valve |
| CN104564890A (en) * | 2014-12-30 | 2015-04-29 | 浙江大学 | Switchable multi-channel reversing rotary valve in integral serial-parallel connection |
| CN112255993A (en) * | 2020-09-30 | 2021-01-22 | 潍柴动力股份有限公司 | Excavator power assembly simulation control method, device, equipment and storage medium |
-
2005
- 2005-11-11 CN CN 200520124385 patent/CN2851674Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155030A (en) * | 2011-05-12 | 2011-08-17 | 北京建研机械科技有限公司 | Excavator for top excavation |
| CN102155030B (en) * | 2011-05-12 | 2012-02-29 | 北京建研机械科技有限公司 | Excavator for top excavation |
| CN102304934A (en) * | 2011-06-27 | 2012-01-04 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN102304934B (en) * | 2011-06-27 | 2015-07-15 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN103452960A (en) * | 2012-06-04 | 2013-12-18 | 利勃海尔法国有限公司 | Hydraulic system and pressure limiting valve |
| CN104564890A (en) * | 2014-12-30 | 2015-04-29 | 浙江大学 | Switchable multi-channel reversing rotary valve in integral serial-parallel connection |
| CN112255993A (en) * | 2020-09-30 | 2021-01-22 | 潍柴动力股份有限公司 | Excavator power assembly simulation control method, device, equipment and storage medium |
| CN112255993B (en) * | 2020-09-30 | 2022-08-05 | 潍柴动力股份有限公司 | Excavator power assembly simulation control method, device, equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061227 Termination date: 20121111 |