CN205131358U - Steering gear of type of making an uproar low noise falls in multiple damping buffering - Google Patents
Steering gear of type of making an uproar low noise falls in multiple damping buffering Download PDFInfo
- Publication number
- CN205131358U CN205131358U CN201520908618.8U CN201520908618U CN205131358U CN 205131358 U CN205131358 U CN 205131358U CN 201520908618 U CN201520908618 U CN 201520908618U CN 205131358 U CN205131358 U CN 205131358U
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- Prior art keywords
- oil
- buffering
- spool
- back leakage
- leakage groove
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 37
- 238000013016 damping Methods 0.000 title claims abstract description 22
- 239000000446 fuel Substances 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 abstract description 42
- 239000010720 hydraulic oil Substances 0.000 abstract description 13
- 230000009471 action Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract 5
- 230000035939 shock Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000872 buffer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Details Of Valves (AREA)
Abstract
The utility model relates to a steering gear of type of making an uproar low noise falls in multiple damping buffering belongs to hydraulic pressure technical field. The neighbouring pan chu's of separating of valve body of this steering gear ring week oil groove corresponds valve barrel circumference interval distribution's oil gallery, the case corresponds the axially extended oil -recovery tank of the oil gallery circumference interval distribution of department, the bottom of oil -recovery tank is convex, and to extend the degree of depth shallow in the dashpot of oil -recovery tank in the width direction both sides, the neighbouring one end system that separates the dish of case has a buffering chamfer, and separate and form the oil return interval between the dish, the system has the buffering circular arc concave between case oil -recovery tank and the buffering chamfer, when the oil gallery of valve barrel is in and corresponds during the case excircle at adjacent oil -recovery tank interval, oil return oil circuit in valve body ring all oil grooves to the case cuts off. Because the influence of multiple damping action for the velocity of flow and the pressure variation of hydraulic oil are more gentle, thereby have effectively reduced the noise.
Description
Technical field
The utility model relates to a kind of low noise deflector, and especially the deflector of a kind of employing multiple damping buffering noise reducing type low noise, belongs to technical field of hydraulic pressure.
Background technology
Hydraulic steering gear (typical structure is the Chinese patent application document of 201310712740.3,201410791052.5 see application number) is a kind of Hydraulic Elements being widely used in engineering truck and turning to, and has safe and reliable, that flexible operation is light advantage.By means of hydraulic steering gear, driver only need can realize larger steering effort by less actuating force and control.
But in prior art, during hydraulic steering gear running, noise is insoluble problem greatly always.The patent No. is that the Chinese patent literature of ZL201420807712.X proposes a kind of low noise deflector, this deflector has valve body oil-feed annular groove and valve pocket and spool is housed, one end of valve pocket has valve pocket fuel return hole, the stage casing of valve pocket has valve pocket distributor port, has valve pocket fuel feed hole between valve pocket fuel return hole and valve pocket distributor port; Spool one end has one group of circumference spool fuel return hole corresponding with valve pocket fuel return hole position spaced apart, and the corresponding valve pocket fuel feed hole position of spool has distribution oil ring groove, and the one group connectivity slot corresponding with valve pocket distributor port position is extended at distribution oil ring groove circumference interval; One group at least in valve pocket fuel return hole and spool fuel return hole is shaped with to organizing each fuel return hole place the dashpot that axial extension is greater than fuel return hole circulation length each.The technical scheme of this patent can become mild because of the transition gradually of intermediateness due to the closedown of fuel return hole or connection, therefore make the flow velocity of hydraulic oil and pressure change comparatively soft, result effectively reduces noise.But the spool back leakage groove of this deflector is got through, though make the flow velocity of backflow and pressure change comparatively soft by buffering tank liquor, but hydraulic oil by valve body oil groove by after the circumference of spool correspondence position fuel return hole spaced apart, directly entered in the endoporus of spool by spool back leakage groove and reflux, its flow velocity and pressure change fail to reach the order of magnitude of hope, therefore fail to produce the effect of order of magnitude noise reduction.
Utility model content
The purpose of this utility model is: for above-mentioned prior art Problems existing, by structural development, proposes a kind of multiple damping buffering noise reducing type low noise deflector that can produce order of magnitude noise reduction.
In order to reach above object, multiple damping buffering noise reducing type low noise of the present utility model deflector comprise fit together according to the order of sequence valve body, every dish, turn stator Meshing Pair and bonnet, the valve opening of described valve body is built with valve pocket and the indexable spool be inserted in valve pocket, one end of described valve pocket is in transmission connection by the corresponding end of bearing pin and universal driving shaft, the other end of described universal driving shaft is engaged with the female splines transmission turning stator Meshing Pair rotor by external spline teeth, and one end of described spool is connected with input shaft;
Described valve body vicinity every the corresponding described valve pocket circumference of ring week oil groove of Pan Chu fuel return hole spaced apart, described spool corresponding fuel return hole place circumference axially extended back leakage groove spaced apart; The bottom of described back leakage groove is circular arc, and the dashpot that the degree of depth is shallower than back leakage groove is extended in Width both sides;
Described spool vicinity is shaped with buffering chamfering every one end of dish, and and form oil return interval between coiling; Be shaped with between described spool back leakage groove and buffering chamfering that to cushion circular arc recessed;
When the fuel return hole of described valve pocket is in the outer bowlder of spool at corresponding described adjacent back leakage groove interval, described valve body ring week oil groove cut off to the oil return circuit in spool;
When the fuel return hole of described valve pocket is in the dashpot of corresponding described back leakage groove side, described valve body ring week oil groove, buffering chamfering recessed by spool dashpot, back leakage groove, buffering circular arc by valve pocket fuel return hole, oil return interval, be communicated to the oil return circuit in spool.
In work, valve pocket and spool relatively rotate, and beat gradually and open or close oil return circuit.Because the back leakage groove both sides of spool have dashpot, therefore during oil return, hydraulic oil first enters dashpot from valve pocket fuel return hole, then enters back leakage groove, plays the first heavy shock damping action; And back leakage groove is the circular arc bottom directly not penetrating into spool endoporus, comparatively dark and two ends are more shallow in its groove, the hydraulic oil therefore entering back leakage groove can spring up to two ends and stopped by valve sleeving inner wall in more shallow place, plays the second heavy shock damping action; Pour into spool vicinity every dish one end hydraulic oil will enter cushion circular arc recessed, produce similar springing up at back leakage groove circular arc bottom, be subject to the stop of valve sleeving inner wall equally, play triple shock damping action; Then hydraulic oil flow path buffering chamfering, flow area becomes large gradually, final then enter valve core inside by oil return interval, then oil sump tank, and cushions chamfering and go to oil return interval and again will offset a part of hydraulic thrust, plays quadruple shock damping action.As a result, under the effect of quadruple damping, valve pocket and spool oil circuit open and close the hydraulic oil flow velocity that causes and pressure changes compared with prior art, have occurred the reduction of the order of magnitude, thus more gentle, achieve the noise reduction of the order of magnitude.
Further, the bottom of described dashpot be with back leakage groove bottom concentric circular arc.
Further, the arc radius that described buffering circular arc is recessed is less than the arc radius bottom described back leakage groove.
Further, the width that described buffering circular arc is recessed is greater than the beam overall of back leakage groove both sides dashpot.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the valve core structure schematic diagram of Fig. 1 embodiment.
Fig. 3 is the housing configuration schematic diagram of Fig. 1 embodiment.
Detailed description of the invention
The concrete structure of the present embodiment multiple damping buffering noise reducing type low noise deflector as shown in Figure 1, valve body 1, every dish 2, turns stator Meshing Pair 3 and bonnet 4 fits together according to the order of sequence, and the valve opening of valve body 1 is built with valve pocket 5 and the indexable spool 6 that is inserted in valve pocket 5.One end of valve pocket 5 is in transmission connection by the corresponding end of bearing pin 7 with universal driving shaft 8, and the other end of universal driving shaft 8 is engaged with the female splines transmission turning stator Meshing Pair 3 rotor by external spline teeth, and one end of spool 6 is connected with input shaft 9.
See Fig. 2, Fig. 3, valve body 1 vicinity axially can be arranged by being required to be every the fuel return hole 5-1(that ring week oil groove 1-1 corresponding valve pocket 5 circumference of Pan2Chu is spaced apart more), spool 6 corresponding fuel return hole 5-1 place circumference axially extended back leakage groove 6-1 spaced apart.The bottom of oil return 6-1 is the circular arc of radius R, and the dashpot 6-2 that the degree of depth is shallower than back leakage groove 6-1 is extended in Width both sides, the bottom of this dashpot 6-2 be with back leakage groove 6-1 bottom concentric circular arc.Spool 6 is contiguous is shaped with buffering chamfering 6-4 every one end of dish 2, and and between dish 2, forms oil return interval 1-2.Between spool back leakage groove 6-1 and buffering chamfering 6-4, to be shaped with radius be r(r<R) the recessed 6-3 of buffering circular arc, the width of the recessed 6-3 of buffering circular arc is greater than the overall width of back leakage groove 6-1 both sides dashpot 6-2.Other structure and prior art are substantially identical, do not repeat one by one.
Rotate when valve pocket is relative with spool, when the fuel return hole 5-1 of valve pocket 5 is in the spool cylindrical 6-5 at corresponding adjacent back leakage groove 6-1 interval, valve body 1 ring week, oil groove 1-1 cut off to the oil return circuit in spool 6---as shown in Figure 1.When the fuel return hole 5-1 of valve pocket 5 goes to the dashpot 6-2 being in corresponding back leakage groove 6-1 side, valve body 1 ring week oil groove 1-1 to start by valve pocket fuel return hole 5-1, by spool dashpot 6-2, back leakage groove 6-1, the recessed 6-3 of buffering circular arc, buffering chamfering 6-4, oil return interval 1-1, to be communicated to the oil return circuit in spool 6.
In a word, valve pocket and spool relatively rotate to beat gradually and open in oil return circuit process, and hydraulic oil first enters back leakage groove from valve pocket fuel return hole through dashpot, are exerted pressure by the first heavy damping buffering; Back leakage groove does not directly penetrate into spool endoporus, and its circular arc bottom makes hydraulic oil, and to two ends, more shallow place springs up and stopped by valve sleeving inner wall, forms the damping that second restarts buffer deceleration effect; Pour in back leakage groove spool vicinity every dish one end hydraulic oil enter buffering circular arc recessed after, produce similar springing up towards end, be subject to the stop of valve sleeving inner wall equally, play triple shock damping action; The hydraulic oil flow path buffering chamfering gushed out, become large gradually through flow area, then enter valve core inside by oil return interval, complete required fuel tank backflow, this process buffers chamfering goes to oil return interval will offset a part of hydraulic thrust again, play quadruple shock damping action.The closing process of oil return circuit can counter pushing away and knowing.
Experiment results proved, under the shock damping action that above-mentioned quadruple is connected mutually, valve pocket and spool oil circuit open and close the hydraulic oil flow velocity that causes and pressure to be changed and has occurred the reduction of the order of magnitude, and thus noise reduction is very remarkable.
Claims (4)
1. multiple damping buffering noise reducing type low noise deflector, comprise fit together according to the order of sequence valve body, every dish, turn stator Meshing Pair and bonnet, the valve opening of described valve body is built with valve pocket and the indexable spool be inserted in valve pocket, one end of described valve pocket is in transmission connection by the corresponding end of bearing pin and universal driving shaft, the other end of described universal driving shaft is engaged with the female splines transmission turning stator Meshing Pair rotor by external spline teeth, and one end of described spool is connected with input shaft; It is characterized in that:
Described valve body vicinity every the corresponding described valve pocket circumference of ring week oil groove of Pan Chu fuel return hole spaced apart, described spool corresponding fuel return hole place circumference axially extended back leakage groove spaced apart; The bottom of described back leakage groove is circular arc, and the dashpot that the degree of depth is shallower than back leakage groove is extended in Width both sides;
Described spool vicinity is shaped with buffering chamfering every one end of dish, and and form oil return interval between coiling; Be shaped with between described spool back leakage groove and buffering chamfering that to cushion circular arc recessed;
When the fuel return hole of described valve pocket is in the outer bowlder of spool at corresponding described adjacent back leakage groove interval, described valve body ring week oil groove cut off to the oil return circuit in spool;
When the fuel return hole of described valve pocket is in the dashpot of corresponding described back leakage groove side, described valve body ring week oil groove, buffering chamfering recessed by spool dashpot, back leakage groove, buffering circular arc by valve pocket fuel return hole, oil return interval, be communicated to the oil return circuit in spool.
2. multiple damping buffering noise reducing type low noise according to claim 1 deflector, is characterized in that: the bottom of described dashpot be with back leakage groove bottom concentric circular arc.
3. multiple damping buffering noise reducing type low noise according to claim 2 deflector, is characterized in that: the recessed arc radius of described buffering circular arc is less than the arc radius bottom described back leakage groove.
4. multiple damping buffering noise reducing type low noise according to claim 3 deflector, is characterized in that: the recessed width of described buffering circular arc is greater than the beam overall of back leakage groove both sides dashpot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520908618.8U CN205131358U (en) | 2015-11-16 | 2015-11-16 | Steering gear of type of making an uproar low noise falls in multiple damping buffering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520908618.8U CN205131358U (en) | 2015-11-16 | 2015-11-16 | Steering gear of type of making an uproar low noise falls in multiple damping buffering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205131358U true CN205131358U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520908618.8U Active CN205131358U (en) | 2015-11-16 | 2015-11-16 | Steering gear of type of making an uproar low noise falls in multiple damping buffering |
Country Status (1)
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|---|---|
| CN (1) | CN205131358U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106697045A (en) * | 2015-11-16 | 2017-05-24 | 镇江液压股份有限公司 | Multiple-damping-buffer noise-reduction type low-noise steering gear |
| CN111874095A (en) * | 2020-08-24 | 2020-11-03 | 荆州恒隆汽车零部件制造有限公司 | Noise reduction oil way for valve core assembly of automobile steering device |
-
2015
- 2015-11-16 CN CN201520908618.8U patent/CN205131358U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106697045A (en) * | 2015-11-16 | 2017-05-24 | 镇江液压股份有限公司 | Multiple-damping-buffer noise-reduction type low-noise steering gear |
| CN111874095A (en) * | 2020-08-24 | 2020-11-03 | 荆州恒隆汽车零部件制造有限公司 | Noise reduction oil way for valve core assembly of automobile steering device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |