CN103775695A - Optimized pressure relief valve having a cartridge made of plastic and a traction mechanism with such a pressure relief valve - Google Patents
Optimized pressure relief valve having a cartridge made of plastic and a traction mechanism with such a pressure relief valve Download PDFInfo
- Publication number
- CN103775695A CN103775695A CN201310484906.0A CN201310484906A CN103775695A CN 103775695 A CN103775695 A CN 103775695A CN 201310484906 A CN201310484906 A CN 201310484906A CN 103775695 A CN103775695 A CN 103775695A
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- China
- Prior art keywords
- excess pressure
- piston
- pressure valve
- sleeve
- ball
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0406—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a pressure relief valve for a hydraulically extendable piston (1) of a traction mechanism. The pressure relief valve has a pressure relief valve piston (2) which can be fixed within the extendable piston (1). The pressure relief valve has a sleeve (5) mounted on the pressure relief valve piston (2). A spring (10) is arranged inside the sleeve and the spring applies a compression force onto a ball (9) serving as a valve body in the longitudinal direction of the pressure relief valve. The sleeve (5) is formed by plastics molding. The invention also relates to the traction mechanism for an internal combustion engine having a traction tensioner.
Description
Technical field
The present invention relates to a kind of excess pressure valve of the piston can hydraulic pressure shifting out for traction piece transmission device, described excess pressure valve has excess pressure valve piston, this excess pressure valve piston can be fixed on the inside of extensible piston, described excess pressure valve has the sleeve being arranged in described excess pressure valve piston, have spring in described sleeve inner, described spring is applied to impacting force on the ball that act as valve body on the longitudinal direction of excess pressure valve.
Background technique
This excess pressure valve that also can be described as pressure-limit valve (DBV) is known and especially in the traction piece transmission device of internal-combustion engine, uses in automotive field.They usually also with auxiliary unit in act on associated in.
In this traction piece transmission device, use traction piece part, as belt or chain, so that torque provides mechanism to be delivered to torque holding mechanism from torque.Because the length of traction piece part changes owing to heating and wearing and tearing, so must often calibrate the pretension of traction piece part again.For this uses traction piece stretcher, the especially traction piece stretcher of hydraulic pressure, at the inner excess pressure valve that uses of described traction piece stretcher.
For traction piece part, known by DE102007058735A1 with excess pressure valve or pressure-limit valve, conventional hydraulic tensioning unit.Introduce there the hydraulic tensioning unit for traction piece part, it comprises and being arranged in cylindrical housings, the piston that oil pressure loads, in the piston bottom of this piston, for safety, pressure-limit valve/excess pressure valve outwardly open in the time reaching limited ultimate pressure is installed in boring in the middle of axial, described pressure-limit valve/excess pressure valve comprises the valve ball of pressing against valve seat by means of pressure spring, wherein, valve seat is configured in the bottom section of ball receiving element of tank shape, the cylindrical wall of this valve seat is inserted cover around ball guide portion, for along stroke axially and upwards pilot valve ball of footpath, the inwall that ball guide portion is inserted cover is by near valve seat, the first cylindrical region of larger diameter forms, in order to limit stroke, this cylindrical region is transitioned into away from valve seat gradually, in the second cylindrical region of small diameter.
In known excess pressure valve, be identified as shortcoming, the common right and wrong of these excess pressure valves bubble-tight and only can be in factory by difficult the air tight test that provides.At spring, conventionally also there are large wearing and tearing on valve spring.In addition, scarcely have ball guide portion, this causes, and clip is dangerous to be improved.Piston also can not be squeezed into type mostly, and this causes higher cost.Unfortunately, valve ball stroke also has very large tolerance mostly, and described tolerance is unacceptable in many cases.
Summary of the invention
Task of the present invention is to eliminate described shortcoming and a kind of excess pressure valve is provided, and described excess pressure valve not only can be arranged in piston with separate part, and then just can be verified, and the sub-assembly unit that can be used as preproduction is checked.Excess pressure valve also should, with respect to piston seal, wherein, should be avoided the shortcoming occurring in steel to steel pairing (Stahl-zu-Stahl-Paarungen).Especially should avoid bothersome and machining piston expensively.Should be able to employ extrusion modling blank.It is simpler and more accurately and especially by providing corresponding guide portion to eliminate the complaint based on clip problem that leak test should become.
This task solves thus in this class excess pressure valve, that is, described sleeve is by plastic shaping.Use PA or PA66 to be proved to be especially favourable, just as additionally adding reinforced fibers, as glass fibre or nylon fiber, described fiber can be further preferably along the longitudinal direction orientation of sleeve.
By this way, in the time that running Security raises, realize cost optimization and improve running and sealing.Uniting for different application field also can be realized thus.
Favourable mode of execution is also required in the dependent claims and illustrates in detail below.
Therefore advantageously, sleeve, on inner side, preferably has the spring guide portion section that ball guide portion section that at least one and described ball profile match and/or at least one and described spring match in the through hole that holds spring and ball.Thus, described valve maintains its structure type, to avoid the change of extrusion modling instrument.This optimization relates in particular to the plastic sleeve in valve inside.
Also meet object, described ball guide portion section has the external shape of depression and/or extends to belt on longitudinal direction, wherein, preferably multiple ball guide portion sections is arranged on the inner periphery of through hole mutually equally spacedly. Use 3,4,5,6,7,8 or more ball guide portion section are especially proved to be favourable, to also avoid the inside of ball clip at sleeve under extreme applications situation.Also can distribute better power.In addition, the friction between ball and plastic sleeve is held low.
But, the present invention also relates to the traction piece transmission device for the internal-combustion engine with traction piece stretcher, it has the piston of the excess pressure valve with good grounds the present invention's design.
In other words, implement like this sleeve, make to realize a kind of special ball guide portion, it is for example with three guiding raceways and a limited ball stroke restricting means.Valve ball is in operation and can no longer can be opened no longer continuously thus by clip and described valve.By this new ball guide portion also modulating valve ball stroke more accurately, this can make tolerance less and improve the running of valve and guarantee uniform control characteristic.
Additionally, spring is also motion and no longer friction in coarse piston boring in plastic sleeve now, and this has stoped the wearing and tearing on valve spring.
Have two kinds of change programmes, that is, the first, sleeve is by the little sealing lip sealing on the periphery of plastic sleeve, especially one in piston boring and one in pressure-limit valve-boring (DBV-boring).At this, sleeve is pressed in DBV-boring and in piston boring.On the other hand, the outside seal ring sealing that sleeve also can point to by flange-type ground radially outward, wherein, seal ring, between piston and overvoltage piston, is arranged in excess pressure valve piston.
In two kinds of change programmes, all can in factory, carry out stable air analysis and defective parts can be detected reliably.Additionally can save the cost that add man-hour by the boring of altered piston, this is because plastic sleeve is arranged in described piston boring now, and piston itself, i.e. main piston and the excess pressure valve piston that is arranged in main piston can be used as the manufacture of extrusion modling part now.
Accompanying drawing explanation
Also illustrate in detail the present invention by accompanying drawing below, two different embodiments shown in the drawings.Wherein:
Fig. 1 illustrates the longitudinal section through the piston of the first mode of execution with good grounds excess pressure valve of the present invention, and wherein, the sealing lip on sleeve outside is used,
Fig. 2 illustrates the traction piece transmission device piston of the second mode of execution with good grounds excess pressure valve of the present invention, wherein, in plastic sleeve use in outside, around flange-type seal ring, sealing annulate shaft to ground between the convex shoulder and excess pressure valve piston of piston
Fig. 3 illustrates the single stereogram of the embodiment's of Fig. 2 plastic sleeve, and
Fig. 4 illustrates along the plan view of the longitudinal direction of the plastic sleeve of Fig. 3.
Embodiment
Accompanying drawing only for illustrative nature and only for understanding the present invention.Identical element is provided with identical reference character.
In the first embodiment shown in Figure 1, this piston of piston 1(can hydraulic pressure shifting out also can be described as main piston) use at the traction piece transmission device for internal-combustion engine, even if be used in traction piece stretcher.
Excess pressure valve piston 2 itself is installed in piston 1.The maximum periphery of excess pressure valve piston 2 substantially corresponding to or be slightly less than interior week of main piston 1.Excess pressure valve piston 2 is positioned near of the distal end 3 of main piston in the inside of main piston 1, have oil outlet 4 in this distal end.
Between excess pressure valve piston 2 and the distal end 3 of piston 1, arrange sleeve 5, in the present embodiment, the largest outer diameter of this sleeve substantially corresponding to or be slightly less than inner diameter and main piston 1 and the inner diameter this joint area of excess pressure valve piston 2.On the outer side surface with the sleeve 5 of cylindrical outer wall substantially, be configured with sealing lip 6, for example two, three, four or five sealing lips 6.
Excess pressure valve piston 2 has filler opening 8, as long as the impacting force that applied by spring 10 is larger than be applied to pressure on ball 9 in the direction of spring 10 by hydraulic medium (as oil), the ball 9 that this filler opening is just positioned at sleeve 5 inside seals.
Likely, sleeve 5 is pressed against in piston 1 and/or in excess pressure valve piston 2.Snap ring 13 is arranged between excess pressure valve piston 2 and piston on the side that deviates from distal end 3 of excess pressure valve piston 2, to ensure that excess pressure valve piston 2 is in it in position with respect to piston 1.Piston 1 is by hydraulic pressure motion to the direction of arrow A to (unshowned) tensioning frame, so that tensioning frame moves, thereby makes each traction piece part of guiding by tensioning frame, move as chain or belt.
If the pressure of piston 1 inside is excessive, oil flows in overvoltage piston 2 inside through filler opening 8, ball 9 is extruded from the valve seat 14 of its sealing and oil can pass through oil outlet 4 and flow out from piston 1.
The embodiment of Fig. 2 is substantially corresponding to according to the embodiment of Fig. 1, but different from the first embodiment, the sleeve 5 being also made up of plastics has the seal ring integrated with plastic sleeve 15, and sealing ring also can be called as flange section 16.
Sealing ring 15 is axially present between excess pressure valve piston 2 and the convex shoulder 17 of main piston/piston 1, in other words be such,, distolateral 18 in reclining mutually with the axial vane surface 19 of seal ring 15, and this another axial vane surface of another axial vane surface 20(of seal ring 15 is present on the another side of the distal end 3 of seal ring) in reclining mutually with the convex shoulder 17 of piston 1.
As can be clear that by Fig. 3 and Fig. 4, three ball guide portions 21 radially inwardly point to ground and are present on sleeve 5, and wherein, they can have the concave surface for guide ball 9.Ball guide portion 21 is designed to equal angles around the central distribution of sleeve 5 and is restricted to band shape.
In addition, construct at least one spring guide portion 22.Ball guide portion 21 also can be called as ball guide portion section, and relatively, spring guide portion 22 also can be called as spring guide portion section.
Reference numerals list
Piston/main piston that 1 can hydraulic pressure shifts out
2 excess pressure valves
3 distal end
4 oil outlets
5 sleeves
6 sealing lips
7 longitudinal axis
8 filler openings
9 balls
10 springs
11 sleeves distolateral
12 seal convexities
13 snap rings
14 valve seats
15 seal rings
16 flange sections
17 convex shoulders
18 excess pressure valve pistons distolateral
The first axial vane surface of 19 seal rings
The second axial vane surface of 20 seal rings
21 ball guide portions
22 spring guide portions
Claims (6)
1. the excess pressure valve of the piston (1) shifting out for the energy hydraulic pressure of traction piece transmission device, described excess pressure valve has excess pressure valve piston (2), described excess pressure valve piston can be fixed on the inside of the described piston that can shift out (1), described excess pressure valve has the sleeve (5) being arranged on described excess pressure valve piston (2), there is spring (10) in described sleeve inner, described spring is applied to impacting force on the ball (9) as valve body on the longitudinal direction of described excess pressure valve, it is characterized in that, described sleeve (5) is by plastic shaping.
2. according to the excess pressure valve of claim 1, it is characterized in that, described sleeve (5), on inner side, preferably has the ball guide portion section (21) that at least one and described ball profile match and/or the spring guide portion section (22) matching with described spring (10) in the through hole that holds described spring (10) and described ball (9).
3. according to the excess pressure valve of claim 2, it is characterized in that, described ball guide portion section (21) has the external shape of depression and/or extends to belt on longitudinal direction, wherein, preferably multiple ball guide portion sections (21) is arranged on the interior week of through hole mutually equally spacedly.
4. according to the excess pressure valve of claim 3, it is characterized in that, on the described outer side surface with the sleeve of cylindrical outer wall (5) substantially, be configured with sealing lip (6).
5. according to the excess pressure valve of claim 3, it is characterized in that, described sleeve (5) has integrated seal ring (15), described seal ring be configured to flange section (16) and be arranged in the axial direction described excess pressure valve piston (2) and the convex shoulder (17) of described piston (1) between.
6. for the traction piece transmission device of the internal-combustion engine with traction piece stretcher, it has band according to the piston of the excess pressure valve one of aforementioned claim Suo Shu (2) (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210218891 DE102012218891A1 (en) | 2012-10-17 | 2012-10-17 | Optimized pressure relief valve for hydraulically extensible piston of flexible drive e.g. belt, for internal combustion engine of motor car, has cartridge utilized at valve piston and made of plastic material and reinforcing fiber |
| DE102012218891.6 | 2012-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103775695A true CN103775695A (en) | 2014-05-07 |
Family
ID=50383242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310484906.0A Pending CN103775695A (en) | 2012-10-17 | 2013-10-16 | Optimized pressure relief valve having a cartridge made of plastic and a traction mechanism with such a pressure relief valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103775695A (en) |
| DE (1) | DE102012218891A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090358A (en) * | 2016-06-07 | 2016-11-09 | 珠海市思卡净化技术有限公司 | A kind of driven sealed ball float blowoff valve |
| CN109563913A (en) * | 2016-08-17 | 2019-04-02 | 博格华纳公司 | The check-valves and integrated pressure-relief valve controlled by metal tape |
| CN112643073A (en) * | 2019-10-11 | 2021-04-13 | 肯纳金属公司 | Hydraulic tool mount and sealing piston for such a mount |
| CN113028111A (en) * | 2021-04-07 | 2021-06-25 | 刘红伟 | Foam goes out liquid machine from fitting choke valve structure |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015200605B3 (en) * | 2015-01-16 | 2016-01-14 | Schaeffler Technologies AG & Co. KG | Clamping device with venting insert for a chain drive |
| DE102015200606B4 (en) * | 2015-01-16 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Clamping device for a chain drive |
| DE102015209557A1 (en) | 2015-05-26 | 2016-12-01 | Schaeffler Technologies AG & Co. KG | Function-separated hydraulic traction mechanism with intermediate piston |
| KR20200115642A (en) | 2018-02-26 | 2020-10-07 | 보르그워너 인코퍼레이티드 | Variable force tensioner with internal reservoir technology primary bore |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0952375B1 (en) * | 1998-04-20 | 2003-06-11 | BorgWarner, Inc. | Hydraulic tensioner with pressure relief valve |
| CN1769742A (en) * | 2004-11-02 | 2006-05-10 | 株式会社椿本链索 | Hydraulic tensioner |
| CN101006288A (en) * | 2004-08-19 | 2007-07-25 | 谢夫勒两合公司 | Hydraulic tensioning device for a traction mechanism drive |
| DE102007058735A1 (en) * | 2007-12-06 | 2009-06-10 | Schaeffler Kg | Hydraulic clamping unit for traction means with a pressure relief valve |
| FR2916256B1 (en) * | 2007-04-27 | 2010-09-17 | Paris Savoie Ind | HYDRAULIC BALLPOINT VALVE HAVING A CANNELEE SHIRT |
| CN201628032U (en) * | 2010-03-28 | 2010-11-10 | 董玉芬 | One-way non-return pipe joint |
-
2012
- 2012-10-17 DE DE201210218891 patent/DE102012218891A1/en not_active Withdrawn
-
2013
- 2013-10-16 CN CN201310484906.0A patent/CN103775695A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0952375B1 (en) * | 1998-04-20 | 2003-06-11 | BorgWarner, Inc. | Hydraulic tensioner with pressure relief valve |
| CN101006288A (en) * | 2004-08-19 | 2007-07-25 | 谢夫勒两合公司 | Hydraulic tensioning device for a traction mechanism drive |
| CN1769742A (en) * | 2004-11-02 | 2006-05-10 | 株式会社椿本链索 | Hydraulic tensioner |
| FR2916256B1 (en) * | 2007-04-27 | 2010-09-17 | Paris Savoie Ind | HYDRAULIC BALLPOINT VALVE HAVING A CANNELEE SHIRT |
| DE102007058735A1 (en) * | 2007-12-06 | 2009-06-10 | Schaeffler Kg | Hydraulic clamping unit for traction means with a pressure relief valve |
| CN201628032U (en) * | 2010-03-28 | 2010-11-10 | 董玉芬 | One-way non-return pipe joint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090358A (en) * | 2016-06-07 | 2016-11-09 | 珠海市思卡净化技术有限公司 | A kind of driven sealed ball float blowoff valve |
| CN109563913A (en) * | 2016-08-17 | 2019-04-02 | 博格华纳公司 | The check-valves and integrated pressure-relief valve controlled by metal tape |
| CN112643073A (en) * | 2019-10-11 | 2021-04-13 | 肯纳金属公司 | Hydraulic tool mount and sealing piston for such a mount |
| CN112643073B (en) * | 2019-10-11 | 2024-03-08 | 肯纳金属公司 | Hydraulic tool mount and sealing piston for such mount |
| CN113028111A (en) * | 2021-04-07 | 2021-06-25 | 刘红伟 | Foam goes out liquid machine from fitting choke valve structure |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012218891A1 (en) | 2014-04-17 |
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| PB01 | Publication | ||
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Owner name: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Effective date: 20150729 |
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Address after: German Herzogenaurach Applicant after: SCHAEFFLER TECHNOLOGIES AG & CO. KG Address before: German Herzogenaurach Applicant before: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG Address after: German Herzogenaurach Applicant after: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG Address before: German Herzogenaurach Applicant before: Fifth Schaeffler investment management GmbH & Co.KG |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., KG TO: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Free format text: CORRECT: APPLICANT; FROM: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG TO: SCHAEFFLER TECHNOLOGY GMBH + CO. KG Free format text: CORRECT: ADDRESS; FROM: |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20150729 Address after: German Herzogenaurach Applicant after: Fifth Schaeffler investment management GmbH & Co.KG Address before: German Herzogenaurach Applicant before: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
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Application publication date: 20140507 |