CN200940613Y - Tractor hydraulic distributor - Google Patents
Tractor hydraulic distributor Download PDFInfo
- Publication number
- CN200940613Y CN200940613Y CN 200620031396 CN200620031396U CN200940613Y CN 200940613 Y CN200940613 Y CN 200940613Y CN 200620031396 CN200620031396 CN 200620031396 CN 200620031396 U CN200620031396 U CN 200620031396U CN 200940613 Y CN200940613 Y CN 200940613Y
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- CN
- China
- Prior art keywords
- valve
- control valve
- oil
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Lifting Devices For Agricultural Implements (AREA)
Abstract
A tractor hydraulic pressure distributor, which mainly comprises a shell, a main control valve, an oil reflux valve, a descending speed control valve, a hydraulic oil cylinder safety valve and a sensitivity adjusting valve. The general structure of the distributor is that each main control valve is arrange in a parallel manner in relative empty cavity, and oil paths are arranged between the cavity of the main control valve and the oil reflux cavity of the shell and between the cavity of the descending speed control valve and the oil influx cavity of the hydraulic oil cylinder. Each main control valve uses different kinds of structure. The distributor has compact structure, multiple functions, realiable use and can satisfy the needs of large, medium power wheel tractor.
Description
(1) technical field
The utility model belongs to the tractor field, relates to a kind of tractor hydraulic distributor.
(2) background technique
At present, the tractor hydraulic distributor that uses in China tractor field has a lot of types, according to the unusual rotary valve distributor that is divided into of the structural type of main valve, the discharging type distributor, the sliding valve style distributor, wherein the sliding valve style distributor is that application is more a kind of, it is by main control valve, the hydraulic jack safety valve, scavenger valve, lowering speed control valves etc. partly constitute, what main control valve adopted is the 3-position-3-way slide-valve structure, scavenger valve, lowering speed control valve is a cone valve structure, because structure and oil duct restriction, be usually used in the following tractor of mid power, and structure is simple relatively, function is less.
(3) summary of the invention
The pressure distributor that the purpose of this utility model is to provide a kind of compact structure, function is many, use is reliable, can satisfy big, middle power wheeled tractor uses.
The technical solution of the utility model is: the tractor hydraulic distributor is made up of housing, main control valve, scavenger valve, lowering speed control valve, oil cylinder safety valve, oil cylinder in line check valve, sensitivity adjusting valve etc.Be processed with 4 main oil pockets on the housing: the main control valve pocket, the oil return valve pocket, rate of descent control valve pocket and oil-feed valve pocket, these four oil pockets are parallel and put, and communicate by casting oil duct inside.Main control valve is sleeved in the main control valve pocket by valve pocket, in the oil return valve pocket, except that scavenger valve is housed, sensitivity control valve is housed also; Lowering speed control valve and oil cylinder safety valve end-to-end are installed in the rate of descent control valve pocket.In the oil-feed valve pocket in line check valve is housed.Main control valve adopts the three-position five-way slide-valve structure, and scavenger valve adopts cylindrical straight movable pulley structure, and lowering speed control valve adopts the ball cone valve structure, and the sensitivity adjusting valve adopts the spool valve nested structure, and the oil cylinder safety valve adopts slit damping bevel-type structure.
The utility model tractor hydraulic distributor adopts above-mentioned assembly structure and design of part, and producible positive result is: the sealing of oil hydraulic cylinder guarantees that by lowering speed control valve like this, the quality of fit of main control valve can suitably reduce; Scavenger valve adopts cylindrical straight movable pulley structure, and the work smoothness is good, opens rapidly, and system pressure impact is little when closing, and the oil return resistance is little; Control the decline oil circuit of oil hydraulic cylinder with lowering speed control valve, not only have the function of regulating rate of descent, also can close the oil hydraulic cylinder oil road, as hydraulic lock.Lowering speed control valve adopts the ball cone valve structure, can accomplish to seal fully, and the good reliability of sealing, the decline oil circuit is in parallel with the lifting oil circuit, and the leakage of oil of oil hydraulic cylinder and main control valve are irrelevant.The oil cylinder safety valve has adopted slit damping bevel-type structure, but the spike resistance of absorption liquid cylinder pressure has overshoot characteristic preferably, and sealing is reliable, and the life-span is long; Sensitivity control valve is housed, can improves the resistance control performance under some operating mode.
(4) description of drawings
Fig. 1 is the utility model tractor hydraulic distributor A-A cross section structure sectional view;
Fig. 2 is the utility model tractor hydraulic distributor B-B cross section structure sectional view;
Fig. 3 is the utility model tractor hydraulic distributor C-C cross section structure sectional view;
Fig. 4 is the utility model tractor hydraulic distributor plan view;
Fig. 5 is the utility model tractor hydraulic dispensing arrangement schematic diagram;
(5) embodiment
Fig. 1-tractor hydraulic distributor shown in Figure 4 mainly is made up of housing 1, sensitivity adjusting valve 2, scavenger valve 3, valve pocket 4, main control valve 5, lowering speed control valve 6, oil cylinder safety valve 7, oil cylinder in line check valve 8, oil cylinder filler opening 9, sensitivity control valve 10 etc.
The valve pocket 4 that will put Sealing earlier is pressed into distributor body main control valve pocket with the interference fit form, and the good main control valve 5 that will match the again valve pocket 4 of packing into is loaded onto the return spring rear spiral wall; With scavenger valve 3, the sensitivity control valve 10 oil return valve pocket of packing into successively; Lowering speed control valve 6 and oil cylinder safety valve 7 end-to-ends are packed in the lowering speed control valve chamber; Oil cylinder one-way valve 8 is screwed into the oil cylinder oil suction chamber.
Distributor has lifting, neutrality, the three kinds of operating modes that descend, as shown in Figure 5.When main valve 5 is in the neutral position, oil hydraulic pump comes oil to enter in the D chamber of sensitivity control valve 10 through oil duct A, C, under the effect of hydraulic oil, the spring force that sensitivity control valve 10 overcomes scavenger valve 3 moves right scavenger valve, oil duct B is communicated with back oil road 0, and oil hydraulic pump comes oil just to flow into fuel tank by B, 0 oil duct.At this moment the port for drawdown M of main valve closes, and oil cylinder in line check valve 8 is closed under the effect of spring force and hydraulic jack pressure oil, and farm implements just rest on a certain position.When main control valve moves right and is in lowering position, oil duct A, C are by N UNICOM, scavenger valve is still opened, oil hydraulic pump comes oil to flow back to fuel tank through B, 0 oil duct, at this moment main control valve port for drawdown M opens, decline oil duct E and back oil road F UNICOM, the fluid in the oil hydraulic cylinder under the effect of farm implements gravity through lowering speed control valve 6, oil duct E, F flow into fuel tank, and farm implements are descended.When main control valve is moved to the left and is in raised position, oil duct C communicates with fuel tank by main valve 5 internal oil channel N, the D chamber release of sensitivity control valve 10, and scavenger valve is just under the effect of return spring, be moved to the left together with sensitivity control valve 10, oil duct B and oil duct 0 are cut off.At this moment the port for drawdown M of main control valve closes, and the oil that comes of oil hydraulic pump makes farm implements promote with regard to pushing open oil cylinder one-way valve 8 to enter the lifting oil hydraulic cylinder.The control sensitivity handle can change the travelling speed of scavenger valve, thus the sensitivity of change power control.
Claims (2)
1. a tractor hydraulic distributor mainly is made up of housing (1), scavenger valve (3), main control valve (5), lowering speed control valve (6), oil cylinder safety valve (7), in line check valve (8), sensitivity control valve (10) etc., it is characterized in that: be processed with 4 main oil pockets on the housing (1): the main control valve pocket, the oil return valve pocket, lowering speed control valve chamber and oil-feed valve pocket, these four oil pockets are parallel and put, and communicate by casting oil duct inside; Main control valve (5) is sleeved in the main control valve pocket by valve pocket (4); In the oil return valve pocket, except that scavenger valve (3) is housed, sensitivity control valve (10) is housed also; Lowering speed control valve (6) and oil cylinder safety valve (7) end-to-end are installed in the lowering speed control valve chamber, and in line check valve (8) is housed in the oil-feed valve pocket.
2. tractor hydraulic distributor according to claim 1 is characterized in that: main control valve (5) adopts the three-position five-way sliding valve structure, and valve pocket (4) is an interference fit with distributor body (1); Sensitivity control valve (10) adopts the spool valve nested structure; Scavenger valve (3) is straight movable pulley structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031396 CN200940613Y (en) | 2006-03-31 | 2006-03-31 | Tractor hydraulic distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031396 CN200940613Y (en) | 2006-03-31 | 2006-03-31 | Tractor hydraulic distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200940613Y true CN200940613Y (en) | 2007-08-29 |
Family
ID=38746790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620031396 Expired - Fee Related CN200940613Y (en) | 2006-03-31 | 2006-03-31 | Tractor hydraulic distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200940613Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564919A (en) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | Hydraulic system of wheeled tractor |
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
-
2006
- 2006-03-31 CN CN 200620031396 patent/CN200940613Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564919A (en) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | Hydraulic system of wheeled tractor |
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
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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: 20070829 Termination date: 20100331 |