CN202048037U - Hydraulic distributor of wheeled tractor - Google Patents
Hydraulic distributor of wheeled tractor Download PDFInfo
- Publication number
- CN202048037U CN202048037U CN2011200729494U CN201120072949U CN202048037U CN 202048037 U CN202048037 U CN 202048037U CN 2011200729494 U CN2011200729494 U CN 2011200729494U CN 201120072949 U CN201120072949 U CN 201120072949U CN 202048037 U CN202048037 U CN 202048037U
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- China
- Prior art keywords
- valve
- wheeled tractor
- adopts
- scavenger
- oil cylinder
- 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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Abstract
The utility model relates to a hydraulic distributor of a wheeled tractor. The hydraulic distributor comprises a shell body, an oil return valve, a system safety valve, a main control valve, a falling speed adjusting valve, an oil cylinder safety valve and a one-way valve, wherein the oil return valve, the system safety valve, the main control valve, the falling speed adjusting valve, the oil cylinder safety valve and the one-way valve are respectively arranged in the corresponding cavities in the shell body; the oil return valve adopts a gap damping differential pressure type large conical surface oil return valve; the falling speed adjusting valve adopts a piloted falling speed adjusting valve; and all oil channels in the shell body are made by machining. The full-flow adjustment hydraulic distributor of the wheeled tractor provided by the utility model has good reliability, simple structure and low cost, is convenient to repair and can meet the requirements of high-medium power wheeled tractors; and the oil return valve of the hydraulic distributor of the wheeled tractor cannot have clamping stagnation easily.
Description
Technical field
The utility model relates to a kind of wheeled tractor pressure distributor, belongs to the tractor field.
Background technique
Pressure distributor is widely used in the HYDRAULIC CONTROL SYSTEM of engineering machinery, farm machinery, mainly controls hydraulic oil flow is controlled action from machinery to the direction of hydraulic jack by the opening and closing of control valve.
At present, can be suitable for 44～88 kilowatts big, the pressure distributor that middle power wheeled tractor uses is to introduce the pressure distributor that Italian Fiat technology is produced basically, the function of the tractor lifter of installation the type distributor is more perfect, its distributor adopts the adjustable partial discharge control technique of sensitivity, so it is better to regulate control performance, can satisfy big, the usage requirement of middle power wheeled tractor, but this dispensing arrangement is complicated, the technological requirement height, manufacture cost is higher, and the turbidity test to work fluid are had relatively high expectations, and scavenger valve easily produces clamping stagnation, simultaneously this distributor maintenance, especially the scavenger valve maintenance is very inconvenient.
The model utility content
The purpose of this utility model is to overcome the defective that prior art exists, and a kind of good reliability is provided, and is simple in structure, cost is lower, easy to maintenance, can satisfy the wheeled tractor pressure distributor that full flow big, the middle power wheeled tractor usage requirement is regulated, and its scavenger valve is not easy clamping stagnation.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of wheeled tractor pressure distributor, comprise housing, scavenger valve, the security of system valve, main control valve, the rate of descent modulating valve, oil cylinder safety valve and one-way valve, described scavenger valve, the security of system valve, main control valve, the rate of descent modulating valve, oil cylinder safety valve and one-way valve are installed in the cavity corresponding with it in the housing respectively, described scavenger valve adopts the big conical surface scavenger valve of slit damping error pressure type, described rate of descent modulating valve adopts the rate of descent modulating valve of guide's control, and all oil ducts form by machining in the described housing.
Described one-way valve adopts the ball-valve type one-way valve.
Described security of system valve adopts straight moving cone valve type security of system valve.
Described oil cylinder safety valve adopts straight mantle formula oil cylinder safety valve.
The beneficial effects of the utility model: (one) functional reliability increases greatly.Owing to adopt the big conical surface scavenger valve of slit damping error pressure type, the scavenger valve power of closing is increased, because this scavenger valve cylinder pilot valve itself also is the control oil flow channel, and the guiding area seldom, substantially can not retain dirt on the guide surface, so scavenger valve substantially can clamping stagnation; Change the scavenger valve control mode, change oil cylinder decline oil circuit direction, make oil cylinder decline oil return also flow into oil sump through scavenger valve, so just reduce working bank on the main valve, and all working step on the main valve body is in the main valve hole in the work engineering all the time, do not have step to stretch out main valve hole and form cantilever position and produce clamping stagnation; Housing adopts the machining passage, and the oil duct turbidity test are greatly increased.(2) designs simplification, component number reduces, and simplifies technology, reduces cost.Because the improvement of distributor makes the product of part number and Fiat reduce 30% approximately, and make processing technology simplify the especially processing of scavenger valve and main valve; Housing adopts the processing oil duct to replace the casting oil duct, can greatly reduce the housing reject rate, has reduced cost.(3) easy to maintenance.Distributor does not need to pull down distributor from lifter as prior art and just can keep in repair if the scavenger valve fault occurs, stop up and only need to turn on scavenger valve outside machine, but just maintenance platoon removes, and does not destroy any adjustment of lifter.(4) the utility model distributor not only can substitute mutually with the Fiat like product, and because it can adorn a security of system valve more, so when being used for transforming high and medium power wheeled tractor lifter for this distributor, can make the lifter structure simpler.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the plan view of preferred embodiment of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is asphalt principle figure of the present utility model.
Wherein: 1, housing; 2, the big conical surface scavenger valve of slit damping error pressure type; 3, directly moving cone valve type security of system valve; 4, main control valve; 5, the rate of descent modulating valve of guide's control; 6, straight mantle formula oil cylinder safety valve; 7, ball-valve type one-way valve.
Embodiment
As Fig. 1～wheeled tractor pressure distributor shown in Figure 4, comprise by housing 1, the big conical surface scavenger valve 2 of slit damping error pressure type, the rate of descent modulating valve 5 of directly moving cone valve type security of system valve 3, main control valve 4, guide's control, straight mantle formula oil cylinder safety valve 6 and ball-valve type one-way valve 7.Earlier the main control valve that has valve pocket 4 that pairing is chosen is loaded onto " O " shape seal ring and back-up ring, and the main control valve pocket of the housing 1 of packing into from housing 1 top then until that main control valve pocket and shoulder are collided is spacing, refills the obstruction of main spool spring and main valve; Pack into the oil return valve pocket of housing 1 of the big conical surface scavenger valve 2 of slit damping error pressure type that pairing is chosen refills return spring and scavenger valve and stops up, pack into the opposite of the big conical surface scavenger valve 2 of slit damping error pressure type of the straight moving cone valve type security of system valve 3 that adjusted is good; Then pack into the rate of descent modulating valve 5 of the guide control of being with round section joint ring is from the other end regulation valve body, the return spring of valve of dribbling of packing into, the straight mantle formula oil cylinder safety valve 6 that the adjusted of screwing on then is good; Last unidirectional valve seat threading that earlier will the band round section joint ring is screwed on the one-way valve delivery connection after putting into ball valve and check valve spring and spring seat.When distributor is used for substituting the product of Fiat's technology production, or be loaded on when being with hydraulic pressure to export the lifter of multi-way valve, directly moving cone valve type security of system valve 3 can not adorned, and changes this valve into obstruction and gets final product.
The utility model distributor can be realized descending, neutral, three kinds of functions of lifting.
1) descends: when main control valve 4 outwards moves under its return spring effect, this moment, main control valve 4 was linked up slit damping error pressure type big conical surface scavenger valve 2 back of the body chambeies and fuel tank, oil pump comes oily P just by the path on big conical surface scavenger valve 2 guide surfaces of slit damping error pressure type, the throttle chink of metering head enters the big conical surface scavenger valve of slit damping error pressure type 2 back of the body chambeies and also links up with fuel tank on the big conical surface scavenger valve 2 of slit damping error pressure type, at this moment the big conical surface scavenger valve 2 of slit damping error pressure type just produces pressure difference, overcoming return spring power opens the big conical surface scavenger valve 2 of slit damping error pressure type, oil pump comes oily P just to flow into fuel tank through spill port, the oil pump off-load, at this moment the fluid among the oil cylinder T is closed ball-valve type one-way valve 7, and, come oily P to flow into fuel tank with oil pump through spill port by the big conical surface scavenger valve 2 of slit damping error pressure type by the rate of descent modulating valve 5 of guide's control and the port for drawdown of main control valve 4.
2) neutrality: moved inward by lowering position when main control valve 4 overcomes return spring power, close up to main control valve 4 port for drawdown, the fluid among the oil cylinder T is cut off, and farm implements just maintain static.Back of the body chamber fluid that this moment, main control valve 4 will the big conical surface scavenger valve 2 of slit damping error pressure type and fuel tank communication, damping error pressure type big conical surface scavenger valve 2 in slit still is in opening state, oil pump comes oily P still to back down the big conical surface scavenger valve 2 inflow fuel tanks of slit damping error pressure type, oil pump off-load.
3) promote: when main control valve 4 is continued to move inward by the neutral position, main control valve 4 port for drawdown continue to close.Promote a mouthful unlatching up to main control valve 4, the logical tank port block in slit damping error pressure type big conical surface scavenger valve 2 back of the body chambeies, just oil pump is come oily P to introduce scavenger valve 2 back of the body chambeies, because this back of the body chamber hydraulic pressure area is greater than the ante-chamber area, so, damping error pressure type big conical surface scavenger valve 2 in slit is added return spring power under action of hydraulic force effect is closed the big conical surface scavenger valve 2 of slit damping error pressure type, and the next oily P of oil pump this moment just backs down ball-valve type one-way valve 7 and enters among the oil cylinder T, promotes farm implements.
Should be appreciated that specific embodiment described above only is used to explain the utility model, and be not used in qualification the utility model.Conspicuous variation of being extended out by spirit of the present utility model or change still are among the protection domain of the present utility model.
Claims (4)
1. wheeled tractor pressure distributor, comprise housing (1), scavenger valve (2), security of system valve (3), main control valve (4), rate of descent modulating valve (5), oil cylinder safety valve (6) and one-way valve (7), described scavenger valve (2), security of system valve (3), main control valve (4), rate of descent modulating valve (5), oil cylinder safety valve (6) and one-way valve (7) are installed in the cavity corresponding with it in the housing (1) respectively, it is characterized in that: described scavenger valve (2) adopts the big conical surface scavenger valve of slit damping error pressure type, described rate of descent modulating valve (5) adopts the rate of descent modulating valve of guide's control, and all oil ducts form by machining in the described housing (1).
2. wheeled tractor pressure distributor according to claim 1 is characterized in that: described one-way valve (7) adopts the ball-valve type one-way valve.
3. wheeled tractor pressure distributor according to claim 1 is characterized in that: described security of system valve (3) adopts straight moving cone valve type security of system valve.
4. wheeled tractor pressure distributor according to claim 1 is characterized in that: described oil cylinder safety valve (6) adopts straight mantle formula oil cylinder safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200729494U CN202048037U (en) | 2011-03-18 | 2011-03-18 | Hydraulic distributor of wheeled tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200729494U CN202048037U (en) | 2011-03-18 | 2011-03-18 | Hydraulic distributor of wheeled tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202048037U true CN202048037U (en) | 2011-11-23 |
Family
ID=44988347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200729494U Expired - Fee Related CN202048037U (en) | 2011-03-18 | 2011-03-18 | Hydraulic distributor of wheeled tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202048037U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047972A (en) * | 2014-06-19 | 2014-09-17 | 第一拖拉机股份有限公司 | Pressure control valve of wheeled tractor |
| CN104564919A (en) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | Hydraulic system of wheeled tractor |
| CN104747521A (en) * | 2015-03-28 | 2015-07-01 | 合肥长源液压股份有限公司 | Tractor distributor with high-stability one-way valve |
| CN106015143A (en) * | 2016-07-15 | 2016-10-12 | 第拖拉机股份有限公司 | Front power output electro-hydraulic control valve of tractor |
| CN106151141A (en) * | 2016-07-07 | 2016-11-23 | 第拖拉机股份有限公司 | A kind of tractor allotter |
| CN109312764A (en) * | 2016-06-23 | 2019-02-05 | Smc株式会社 | Speed control |
-
2011
- 2011-03-18 CN CN2011200729494U patent/CN202048037U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047972A (en) * | 2014-06-19 | 2014-09-17 | 第一拖拉机股份有限公司 | Pressure control valve of wheeled tractor |
| CN104564919A (en) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | Hydraulic system of wheeled tractor |
| CN104747521A (en) * | 2015-03-28 | 2015-07-01 | 合肥长源液压股份有限公司 | Tractor distributor with high-stability one-way valve |
| CN109312764A (en) * | 2016-06-23 | 2019-02-05 | Smc株式会社 | Speed control |
| CN109312764B (en) * | 2016-06-23 | 2020-09-25 | Smc株式会社 | Speed controller |
| TWI706090B (en) * | 2016-06-23 | 2020-10-01 | 日商Ｓｍｃ股份有限公司 | Speed controller |
| CN106151141A (en) * | 2016-07-07 | 2016-11-23 | 第拖拉机股份有限公司 | A kind of tractor allotter |
| CN106151141B (en) * | 2016-07-07 | 2017-10-17 | 第一拖拉机股份有限公司 | A kind of tractor distributor |
| CN106015143A (en) * | 2016-07-15 | 2016-10-12 | 第拖拉机股份有限公司 | Front power output electro-hydraulic control valve of tractor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20150318 |
|
| EXPY | Termination of patent right or utility model |