CN202203200U - Lowering valve of hydraulic distributor - Google Patents
Lowering valve of hydraulic distributor Download PDFInfo
- Publication number
- CN202203200U CN202203200U CN2011203162211U CN201120316221U CN202203200U CN 202203200 U CN202203200 U CN 202203200U CN 2011203162211 U CN2011203162211 U CN 2011203162211U CN 201120316221 U CN201120316221 U CN 201120316221U CN 202203200 U CN202203200 U CN 202203200U
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- CN
- China
- Prior art keywords
- lowering valve
- lowering
- valve
- distributor
- oil
- 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 - Lifetime
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Abstract
The utility model discloses a lowering valve device of a hydraulic distributor, which comprises a lowering valve spring seat, a lowering valve spring, a lowering valve spring cushion, a lowering valve, a screw and a lowering valve screw plug. A guiding part of the lowering valve is arranged in the lowering valve screw plug; the lowering valve is sealed at the end part of the lowering valve screw plug; and the lowering valve is connected with the lowering vale spring seat together by the screw. When a main control valve moves rightwards, as the main control valve is connected with the lowering valve by a pressing plate, the lowering valve spring seat is driven to move rightwards, and the lowering valve screw plug is screwed up on a shell of the distributor immovably, the lowering valve spring is compressed in the state; the lowering valve spring seat drives the lowering valve to move; the lowering valve is opened; and the oil in an oil cylinder flows back into an oil tank of the shell, thereby realizing the lowering function of a farm implement.
Description
Technical field
The utility model relates to the pressure distributor technical field, is specifically related to lowering valve the device a kind of and pressure distributor that the tractor lifter is supporting.
Background technique
The effect of tractor hydraulic control system is to connect and the traction farm implements; Handle the up-down of farm implements; The tilth of control farm implements; To the tractor driving wheel weightening finish, to improve the adhesion property of tractor; Can output to its operation of the enterprising Xingqi of Work machine to hydraulic pressure.Pressure distributor is the core component of hydraulic control system, and its effect is to be responsible for the control lifter to accomplish above-mentioned functions; Its performance has direct great influence to whole tractor hydraulic suspension arrangement performance; The function of the lowering valve in the pressure distributor is to guarantee that the oily oil return in the oil hydraulic cylinder is unobstructed, smooth decreasing, and the whole system return pressure is low; Simultaneously; When not oil return of oil hydraulic cylinder, sealing is reliable, guarantees that the oil pressure in the oil hydraulic cylinder is constant.
In recent years, tractor manufacturing, development progress are accelerated, research and development trend tendency high-power, high-performance.There is following shortcoming in traditional pressure distributor: relatively simple for structure, cause poorly sealed, fault such as card valve etc. easily; Accuracy of manufacturing requires tighter, and maintenance cost is high.Along with the lifting of tractor power, oil pump confession amount strengthens, and return pressure significantly rises, and causes faults such as unloaded lifting easily.Lowering valve in the pressure distributor is the decline mode that is used for controlling farm implements, and existing lowering valve is not generally accomplished to seal fully, causes farm implements behind complete operation, can't descend, the shake that descends, and the return pressure of whole hydraulic system is high.
The model utility content
The utility model purpose is: through a kind of pressure distributor lowering valve device, the decline oil circuit of control pressure distributor makes the fluid of oil hydraulic cylinder return fuel tank smoothly, thus the decline of control farm implements.
The utility model is a kind of pressure distributor lowering valve device, and pressure distributor comprises distributor body, unloading valve, one-way valve, scavenger valve, main control valve, lowering valve.When farm implements were in the neutral position, scavenger valve was opened, and high pressure oil gets into fuel tank through scavenger valve.When the needs farm implements promoted, main control valve was moved to the left, and scavenger valve cuts out, and the oil circuit between filler opening and the one-way valve is opened simultaneously, and high pressure oil can only get into oil cylinder from one-way valve, realized the lifting operation of farm implements.When the needs farm implements carried out step-down operation, main control valve moved right, and scavenger valve is opened, and high pressure oil gets into fuel tank through scavenger valve, and the lowering valve assembly is opened, and in-oil cylinder high pressure oil gets into fuel tank through the lowering valve assembly, realized the step-down operation of farm implements.The decline oil circuit of this lowering valve separates with system oil return valve oil return circuit, guarantees that the return pressure of whole system is low.
The pressure distributor lowering valve comprises the lowering valve spring seat, lowering valve spring, lowering valve spring pad, lowering valve, screw, lowering valve plug screw.The targeting part of lowering valve is in the inside of lowering valve plug screw, and lowering valve is sealed in lowering valve plug screw inside, and lowering valve and lowering valve spring seat connect together through screw, and this structure guarantees the good airproof performance of this lowering valve.
Main control valve is when moving right, because main control valve is to be connected through pressing plate with lowering valve, drives the lowering valve spring seat and moves right; Because it is fixed that the lowering valve plug screw is tightened on the distributor body, under this state, the lowering valve spring is compressed; The lowering valve spring seat will drive lowering valve and move; Open lowering valve, the oil of oil cylinder the inside will flow back in the housing fuel tank, realize the decline function of farm implements.
Compared with prior art; The beneficial effect of the utility model is: the distributor lowering valve that adopts the utility model; Can lowering valve be opened through the motion of main control valve; High pressure oil in the oil cylinder is flowed back to via the decline oil circuit in the fuel tank of distributor body through lowering valve, accomplish the agricultural machinery step-down operation smoothly, reduce return pressure.The pressure distributor lowering valve of the utility model can be accomplished the reliability better seal simultaneously.
Further specify below in conjunction with the pressure distributor lowering valve device of accompanying drawing the utility model.
Description of drawings
Fig. 1 is the structural representation of the utility model pressure distributor;
Fig. 2 is the utility model pressure distributor lowering valve position view;
Fig. 3 is the utility model pressure distributor internal structure schematic representation.
Embodiment
As shown in Figure 1, when farm implements were in the neutral position, scavenger valve 4 was opened, and high pressure oil gets into fuel tank through scavenger valve 4.
In conjunction with shown in Figure 2, when the needs farm implements promoted, main control valve 6 was moved to the left, and scavenger valve 4 cuts out, and the oil circuit between filler opening and the one-way valve 3 is opened simultaneously, and high pressure oil can only get into oil cylinder from one-way valve 3, realized the lifting operation of farm implements.When the needs farm implements carried out step-down operation, main control valve 6 moved right, and scavenger valve 4 is opened, and high pressure oil gets into fuel tank through scavenger valve 3, and lowering valve assembly 5 is opened, and in-oil cylinder high pressure oil gets into fuel tank through lowering valve assembly 5, realizes the step-down operation of farm implements.
As shown in Figure 3, pressure distributor lowering valve device comprises lowering valve spring seat 51, lowering valve spring 52, lowering valve spring pad 53, lowering valve 54, screw 55, lowering valve plug screw 56.The targeting part of lowering valve 54 is in the inside of lowering valve plug screw 56, and lowering valve 54 is sealed in lowering valve plug screw 56 inside, and lowering valve 54 connects together through screw 55 with lowering valve spring seat 51, and lowering valve 54 is cone seals.
When main control valve 6 when moving right because main control valve 6 is to be connected through pressing plate 7 Lever types with lowering valve assembly 5, drive lowering valve spring seat 51 moves right; Because it is fixed that lowering valve plug screw 56 is tightened on the distributor body 1, under this state, lowering valve spring 52 is compressed; Lowering valve spring seat 51 will drive lowering valve 54 and move; Open lowering valve 54, the oil of oil cylinder the inside will flow back in the housing fuel tank, realize the decline function of farm implements.
Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technological scheme of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (4)
1. pressure distributor lowering valve device, this lowering valve assembly (5) comprises lowering valve spring seat (51), lowering valve spring (52); Lowering valve spring pad (53), lowering valve (54), screw (55); Lowering valve plug screw (56); It is characterized in that: the targeting part of lowering valve (54) is in lowering valve plug screw (56) inside, and lowering valve (54) is sealed in the end of lowering valve plug screw (56), and lowering valve (54) links together through screw (55) and lowering valve spring seat (51).
2. distributor lowering valve device according to claim 1, its characteristic is being connected with distributor main control valve (6) Lever type through pressing plate (7) with said lowering valve assembly (5), and it is that main control valve (6) is handled through pressing plate (7) that lowering valve assembly (5) opens and closes.
3. distributor lowering valve device according to claim 1 is characterized in that said lowering valve plug screw (56) is fixed on through being threaded on the distributor body (1).
4. distributor lowering valve device according to claim 1 is characterized in that said lowering valve (54) is the cone valve sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203162211U CN202203200U (en) | 2011-08-26 | 2011-08-26 | Lowering valve of hydraulic distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203162211U CN202203200U (en) | 2011-08-26 | 2011-08-26 | Lowering valve of hydraulic distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202203200U true CN202203200U (en) | 2012-04-25 |
Family
ID=45967322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203162211U Expired - Lifetime CN202203200U (en) | 2011-08-26 | 2011-08-26 | Lowering valve of hydraulic distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202203200U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
| CN107956757A (en) * | 2017-12-08 | 2018-04-24 | 山东弘宇农机股份有限公司 | A kind of multifunctional assembled hydraulic control valve |
-
2011
- 2011-08-26 CN CN2011203162211U patent/CN202203200U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
| CN107956757A (en) * | 2017-12-08 | 2018-04-24 | 山东弘宇农机股份有限公司 | A kind of multifunctional assembled hydraulic control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANDONG HONGYU AGRICULTURAL MACHINERY CO., LTD. Free format text: FORMER NAME: SHANDONG HONGYU MACHINERY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 261400 No. 99, Wen Quan Dong Road, Laizhou, Shandong, Yantai Patentee after: SHANDONG HONGYU MACHINERY CO., LTD. Address before: 261400 No. 99, Wen Quan Dong Road, Laizhou, Shandong, Yantai Patentee before: Shandong Hongyu Machinery Co., Ltd. |
|
| CU01 | Correction of utility model patent | ||
| CU01 | Correction of utility model patent |
Correction item: Patentee|Address Correct: Shandong Hongyu Machinery Co., Ltd|261400 No.99 Wenquan East Road, Laizhou City, Yantai City, Shandong Province False: Shandong Hongyu Agricultural Machinery Co., Ltd|261400 No.99 Wenquan East Road, Laizhou City, Yantai City, Shandong Province Number: 52 Volume: 29 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |