CN202302091U - Pressure reducing valve for traveling speed reducer - Google Patents
Pressure reducing valve for traveling speed reducer Download PDFInfo
- Publication number
- CN202302091U CN202302091U CN2011204278592U CN201120427859U CN202302091U CN 202302091 U CN202302091 U CN 202302091U CN 2011204278592 U CN2011204278592 U CN 2011204278592U CN 201120427859 U CN201120427859 U CN 201120427859U CN 202302091 U CN202302091 U CN 202302091U
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- CN
- China
- Prior art keywords
- spool
- oil
- valve
- spring
- speed reducer
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- 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 discloses a pressure reducing valve for a traveling speed reducer, which comprises a valve body and a valve core. One end of the valve body is provided with an oil inlet; the valve core is formed by connecting a first valve core column body and a second valve core column body; the end surface of the first valve core column body is provided with an oil inlet hole; an oil passage communicated with the oil inlet and an oil through hole is also formed inside the valve core; the valve core carries out axial reciprocating movement back and forth in the valve body along a guide wall at the inner side of a guide part; a spring is arranged between the valve core and a fixed part; and when oil enters a cavity from the oil inlet of the valve body, the valve core translates towards one side of the spring under the acting force of the liquid. The length of a second valve core column body extending to the spring occupies above 90 percent of the travel of the spring. The pressure reducing valve has the benefits that the structure improvement is simple, and the manufacture is convenient, and the problem of easiness for compression and deformation of the spring inside the existing valve core can be effectively solved.
Description
Technical field
The utility model relates to the reduction valve technology, especially a kind of driving speed reducer reduction valve that is used for.
Background technique
Excavator is understood some high pressure oil branch and is flowed into the break brake off when walking and in the walking process in the motor oil inlet pipe.When if the hydraulic oil pressure of splitter section surpasses 50bar, pressure oil washes out the break sealing, and hydraulic oil gets into speed reducer, mixes with gear oil; When if pressure is lower than 18bar, can't open the break brake off.For the pressure of the hydraulic oil of controlling brake off part between 18bar-50bar, reduction valve is installed on hydraulic circuit, motor internal structure schematic diagram is seen Fig. 1, reduction valve position label is 0.
After excavator used a period of time, speed reducer braking device can't be opened, and causes speed reducer to damage.Cause analysis: in the excavator walking process, the hydraulic oil that gets into reduction valve is high pressure oil, and the spring of reduction valve is in compressive state always; Because long-time compression; Spring has certain deformation to lose efficacy, and causes the pressure that gets into break to be lower than 16bar, and pressure oil can't be opened break; Cause speed reducer to damage, can't normally walk.If, be difficult to solve the problem that camber of spring lost efficacy through changing the material and the heat-treating methods of spring.
The model utility content
The purpose of the utility model provides a kind of driving speed reducer reduction valve that is used for, and greatly reduces to depend on unduly what spring was located, and can guarantee brake off pressure between 18bar-50bar, only depends on the method for spring force pilot pressure before having changed.
The utility model solves the technological scheme that its technical problem adopted:
A kind of driving speed reducer reduction valve that is used for comprises valve body with hollow cavity and the spool that is positioned at said valve inner:
Said valve body one end is a filler opening, and the other end is fixed on the bearing through a fixed block;
Said spool is joined by the first spool cylinder and two cylinders of the second spool cylinder and forms; The said first spool cylinder is towards said valve body filler opening end; Be provided with some grooves by a determining deviation on the said first spool cylinder, the part between said some grooves is a projection;
Said body wall is provided with first oil outlet and second oil outlet, and said first oil outlet is through a fuel-displaced pipeline and speed reducer internal communication, and said second oil outlet is communicated with fuel tank through another fuel-displaced pipeline;
Have an oil through on the outer wall of the part groove in said some grooves; Claim to be first oil through near said valve body filler opening place; Claim to be second oil through near the said first oil outlet place; On the end face of the said first spool cylinder, offer one and go into oilhole, said valve core inside also is provided with said goes into the asphalt channel that oilhole, said oil through are interconnected;
Said valve interior wall is provided with some guiding elements, the inboard guide wall sliding contact of the projection outer wall of said spool and said guiding element, and said spool axially moves back and forth in said valve body along the inboard guide wall of said guiding element;
Between said spool and said fixed block, lay a spring; The said second spool cylinder stretches in the said spring but produces with said fixed block and contacts, and the distance between the said second spool cylinder end face and the said fixed block is greater than the distance that makes that said second oil through is communicated with said first oil outlet;
In said some guiding elements near said valve body filler opening one end be first guiding element, when any side in the said spring both sides is under pressure when being zero formation one chamber between the said first guiding element inwall and the said spool outer wall;
When the filler opening from said valve body had fluid to get into said chamber, to said spring one side translation, simultaneously went into oilhole and get into said asphalt channel from said by fluid under the active force of fluid for said spool; When said spool moves to said second oil through place groove when partly or entirely docking with said first oil outlet, said asphalt channel communicates with the fuel-displaced pipeline that is connected speed reducer, and unnecessary oil mass of while is passed through said second oil outlet entering external fuel tank;
Wherein:
The said second spool cylinder stretches into more than 90% of stroke that the interior length of said spring occupies said spring.
The above-mentioned driving speed reducer reduction valve that is used for, wherein, on the said second spool cylinder, be provided with step at said second spool cylinder and the said first spool cylinder connecting part.
The above-mentioned driving speed reducer reduction valve that is used for, wherein, the said step of the end face distance of the said second spool cylinder is 11mm towards the end face distance of said spring one side.
The above-mentioned driving speed reducer reduction valve that is used for, wherein, said fixed block is a tightening nut.
The above-mentioned driving speed reducer reduction valve that is used for, wherein, said some grooves are 3 altogether, wherein have to be distributed with an oil through on 2 grooves separately.
The above-mentioned driving speed reducer reduction valve that is used for, wherein, the said first spool cylinder, the said second spool cylinder are cylindrical body.
The above-mentioned driving speed reducer reduction valve that is used for, wherein, the internal diameter of the said first spool cylinder is greater than the internal diameter of the said second spool cylinder.
The utility model architecture advances is simple, easily manufactured, can effectively solve the problem of the easy compressive strain of old valve core inside spring.
Description of drawings
Fig. 1 is the internal structure schematic diagram of the used motor of driving speed reducer in the existing technology;
Fig. 2 is the internal structure schematic representation of reduction valve in the existing technology;
Fig. 3 is the internal structure schematic representation of the reduction valve of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further, but not as the qualification of the utility model.
Fig. 2 is the internal structure schematic representation of reduction valve in the existing technology, please be simultaneously referring to shown in Figure 3, and the utility model is used for the spool 2 that the driving speed reducer reduction valve comprises the valve body 1 with hollow cavity and is positioned at valve body 1 inside.Valve body 1 one ends are filler opening 11, and the other end is fixed on the bearing through a fixed block 3.Spool 2 is joined by the first spool cylinder 21 and 22 two cylinders of the second spool cylinder and forms; The first spool cylinder 21 is towards valve body filler opening 11 ends; Be provided with some grooves 211 by a determining deviation on the first spool cylinder 21, the part between some grooves 211 is a projection 212.
Further, the first spool cylinder 21, the second spool cylinder 22 are cylindrical body, and the internal diameter of the first spool cylinder 21 is greater than the internal diameter of the second spool cylinder 22.
Valve body 1 sidewall is provided with first oil outlet 12 and second oil outlet, 13, the first oil outlets 12 pass through a fuel-displaced pipeline 00 and speed reducer internal communication, and second oil outlet 13 is communicated with fuel tank 01 through another fuel-displaced pipeline.
Have an oil through on the outer wall of the part groove 211 in some grooves 211; Claim to be first oil through 2111 near valve body filler opening 11 places; Claim to be second oil through 2112 near first oil outlet, 12 places; On the end face of the first spool cylinder 21, offer one and go into oilhole (not marking in the drawings), spool 2 inside also are provided with and go into the asphalt channel 213 that oilhole, oil through are interconnected.
Further, some grooves 211 are 3 altogether, wherein have to be distributed with an oil through on 2 grooves 211 separately.
Valve body 1 inwall is provided with some guiding elements, the inboard guide wall sliding contact of projection 212 outer walls of spool 2 and guiding element, and spool 2 axially moves back and forth in valve body 1 along the inboard guide wall of guiding element.
Between spool 2 and fixed block 3, lay a spring 4; The second spool cylinder 22 stretches in the spring 4 but produces with fixed block 3 and contacts; And the distance between the second spool cylinder, 22 end faces and the fixed block 3 can guarantee that to guarantee the stroke of the second spool cylinder 22 in spring 4 second oil through 2112 of spool 2 is communicated with first oil outlet 12 greater than the distance that makes that second oil through 2112 is communicated with first oil outlet 12.
In some guiding elements near valve body 1 filler opening one end be first guiding element 14, when any side in spring 3 both sides is under pressure when being zero formation one chamber between first guiding element, 14 inwalls and spool 2 outer walls.
When the filler opening 11 from valve body 1 had fluid to get into chamber, to spring 3 one side translations, fluid got in the asphalt channel 213 from going into oilhole spool 2 simultaneously under the active force of fluid.When spool 2 moved to second oil through, 2112 place grooves with first oil outlet, 12 part or all of butt joints, asphalt channel 213 communicated with the fuel-displaced pipeline 00 that is connected speed reducer, and simultaneously unnecessary oil mass gets in the external fuel tanks 01 through second oil outlet 13.
In the utility model, with reference to shown in Figure 3, the second spool cylinder 22 stretches into more than 90% of stroke that spring 3 interior length occupy spring 3.Spool 2 behind the lengthening is compared with old spool, and the spool 2 behind the lengthening is after spring 3 is compressed to certain position, and spool 2 produces the contact location, guarantees brake off pressure between 18bar-50bar, only depends on the method for spring force pilot pressure before having changed.
In addition, on the second spool cylinder 22, be provided with step 221 at the second spool cylinder 22 and the first spool cylinder, 21 connecting parts.
Further, the end face distance step 221 of the second spool cylinder 22 is 11mm towards the end face distance of spring 3 one sides.
Further, fixed block 3 is a tightening nut.Tightening nut is common on the market mechanical parts, obtains easily, is convenient to the realization of the utility model.
In sum, the utility model is used for the driving speed reducer reduction valve and has reduced depending on unduly spring location.Controlled the releasing retardation pressure exactly, and change is comparatively simple, can makes things convenient for and the problem that solves the easy compressive strain of existing technology medi-spring effectively.
The above is merely the utility model preferred embodiment; Be not thus the restriction the utility model claim; So the equivalent structure that all utilization the utility model specifications and diagramatic content have been done changes, and all is included in the protection domain of the utility model.
Claims (7)
1. one kind is used for the driving speed reducer reduction valve, comprises valve body with hollow cavity and the spool that is positioned at said valve inner:
Said valve body one end is a filler opening, and the other end is fixed on the bearing through a fixed block;
Said spool is joined by the first spool cylinder and two cylinders of the second spool cylinder and forms; The said first spool cylinder is towards said valve body filler opening end; Be provided with some grooves by a determining deviation on the said first spool cylinder, the part between said some grooves is a projection;
Said body wall is provided with first oil outlet and second oil outlet, and said first oil outlet is through a fuel-displaced pipeline and speed reducer internal communication, and said second oil outlet is communicated with fuel tank through another fuel-displaced pipeline;
Have an oil through on the outer wall of the part groove in said some grooves; Claim to be first oil through near said valve body filler opening place; Claim to be second oil through near the said first oil outlet place; On the end face of the said first spool cylinder, offer one and go into oilhole, said valve core inside also is provided with said goes into the asphalt channel that oilhole, said oil through are interconnected;
Said valve interior wall is provided with some guiding elements, the inboard guide wall sliding contact of the projection outer wall of said spool and said guiding element, and said spool axially moves back and forth in said valve body along the inboard guide wall of said guiding element;
Between said spool and said fixed block, lay a spring; The said second spool cylinder stretches in the said spring but produces with said fixed block and contacts, and the distance between the said second spool cylinder end face and the said fixed block is greater than the distance that makes that said second oil through is communicated with said first oil outlet;
In said some guiding elements near said valve body filler opening one end be first guiding element, when any side in the said spring both sides is under pressure when being zero formation one chamber between the said first guiding element inwall and the said spool outer wall;
When the filler opening from said valve body had fluid to get into said chamber, to said spring one side translation, simultaneously went into oilhole and get into said asphalt channel from said by fluid under the active force of fluid for said spool; When said spool moves to said second oil through place groove when partly or entirely docking with said first oil outlet, said asphalt channel communicates with the fuel-displaced pipeline that is connected speed reducer, and unnecessary oil mass of while is passed through said second oil outlet entering external fuel tank;
It is characterized in that:
The said second spool cylinder stretches into more than 90% of stroke that the interior length of said spring occupies said spring.
2. the driving speed reducer reduction valve that is used for according to claim 1 is characterized in that, on the said second spool cylinder, be provided with step at said second spool cylinder and the said first spool cylinder connecting part.
3. the driving speed reducer reduction valve that is used for according to claim 2 is characterized in that, the said step of the end face distance of the said second spool cylinder is 11mm towards the end face distance of said spring one side.
4. the driving speed reducer reduction valve that is used for according to claim 1 is characterized in that said fixed block is a tightening nut.
5. the driving speed reducer reduction valve that is used for according to claim 1 is characterized in that said some grooves are 3 altogether, wherein has to be distributed with an oil through on 2 grooves separately.
6. the driving speed reducer reduction valve that is used for according to claim 1 is characterized in that, the said first spool cylinder, the said second spool cylinder are cylindrical body.
7. the driving speed reducer reduction valve that is used for according to claim 6 is characterized in that the internal diameter of the said first spool cylinder is greater than the internal diameter of the said second spool cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204278592U CN202302091U (en) | 2011-11-02 | 2011-11-02 | Pressure reducing valve for traveling speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204278592U CN202302091U (en) | 2011-11-02 | 2011-11-02 | Pressure reducing valve for traveling speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202302091U true CN202302091U (en) | 2012-07-04 |
Family
ID=46370988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204278592U Expired - Fee Related CN202302091U (en) | 2011-11-02 | 2011-11-02 | Pressure reducing valve for traveling speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202302091U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032400A (en) * | 2012-12-27 | 2013-04-10 | 宁波广天赛克思液压有限公司 | Novel valve core with spring seat |
| CN110809684A (en) * | 2017-07-07 | 2020-02-18 | 斯堪尼亚商用车有限公司 | Oil distributor for lubrication and cooling system in powertrain |
-
2011
- 2011-11-02 CN CN2011204278592U patent/CN202302091U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032400A (en) * | 2012-12-27 | 2013-04-10 | 宁波广天赛克思液压有限公司 | Novel valve core with spring seat |
| CN110809684A (en) * | 2017-07-07 | 2020-02-18 | 斯堪尼亚商用车有限公司 | Oil distributor for lubrication and cooling system in powertrain |
| CN110809684B (en) * | 2017-07-07 | 2021-08-03 | 斯堪尼亚商用车有限公司 | Oil distributor for lubrication and cooling system in powertrain |
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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: 20120704 Termination date: 20141102 |
|
| EXPY | Termination of patent right or utility model |