WO1999000606A1 - Verfahren zum richten einer membranfeder - Google Patents
Verfahren zum richten einer membranfeder Download PDFInfo
- Publication number
- WO1999000606A1 WO1999000606A1 PCT/DE1998/001852 DE9801852W WO9900606A1 WO 1999000606 A1 WO1999000606 A1 WO 1999000606A1 DE 9801852 W DE9801852 W DE 9801852W WO 9900606 A1 WO9900606 A1 WO 9900606A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spring
- diaphragm spring
- cantilevers
- heated
- cantilever
- Prior art date
Links
Classifications
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/583—Diaphragm-springs, e.g. Belleville
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/32—Belleville-type springs
- F16F1/324—Belleville-type springs characterised by having tongues or arms directed in a generally radial direction, i.e. diaphragm-type springs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49609—Spring making
- Y10T29/49611—Spring making for vehicle or clutch
Definitions
- the invention relates to a method for straightening a diaphragm spring, in particular for straightening the axial height and / or the course of arms of a diaphragm spring.
- Such membrane springs are known for example from DE-OS 3428 001, DE-OS 33 04 670, US-PS 3 977504 and US-PS 3 951 393.
- diaphragm springs or disc springs which are provided in a frictional coupling between the housing and the pressure plate, it has already become known that the radially inwardly directed tongues of the disc spring built into the friction coupling are individually by means of a device which has a large number of movable stamps , to direct the radially inner tongue tips at least approximately to the same axial height.
- the introduction of the actuating force into the friction clutch by means of a release bearing can be significantly improved, as a result of which the function and the efficiency of the friction clutch and of the release system assigned to it can be significantly improved.
- the required actuation path for the friction clutch can thereby be reduced.
- This also results in a more uniform stress on various components of the friction clutch or the disengagement system. In particular, this can result in an impermissibly high canting force on the release bearing and thus on the releaser can be avoided.
- Such tilting is particularly disadvantageous in the case of releasers that can be axially displaced on a transmission-side guide tube, since such a tilting increases the actuating force and significantly increases the wear on the guides.
- a warping or side impact of the plate spring in particular in the area of its radially outer annular base body, can be largely avoided.
- the present invention was based on the object of simply and inexpensively straightening the course of at least one or individual arms of a diaphragm spring or coordinating the relative course of at least individual arms with respect to one another and / or adjusting the height of at least the free end regions to enable individual arms of a diaphragm spring in a simple and inexpensive manner. Furthermore, the invention is intended to ensure a particularly simple and inexpensive construction of the device required for straightening or aligning at least individual arms of a diaphragm spring.
- this is achieved in that at least one arm of the diaphragm spring is heated in a predetermined area in such a way that this area and / or portions adjacent to this area of the boom can be aligned without substantial or practically without elastic deformation.
- the partial heating of the boom can be carried out in such a way that a region located between the end regions of the boom is heated accordingly, so that the sections of the boom provided on both sides of this region can be aligned with respect to one another, as a result of which the free end region of the corresponding boom also opens up a defined axial position can be brought in relation to the longitudinal axis of the diaphragm spring.
- At least two areas or zones of at least one arm can also be heated for straightening the same.
- the areas can be heated simultaneously or with a time delay.
- an intermediate area and the boom tips can be heated. Rapid cooling can at least partially harden at least one of these areas.
- the at least one cantilever of a diaphragm spring to be straightened can first be subjected to bending and then at least the stresses thereby generated in the cantilever can be at least reduced by heating a region of the braced cantilever.
- the heating at least reduces the elastic tensioning of the boom or even removes it practically completely.
- the heated area can advantageously be cooled in such a way that at least partial hardening is again present in this area.
- a method according to the invention can be used in particular in the case of diaphragm springs or disc springs which are thermally finished with respect to their spring properties even before the alignment of at least one arm, preferably a plurality or even all of the arms, possibly apart from tempering and / or hardening of the arm tips are treated.
- the heating in the deformation area of the individual booms at least in part increases the material strength to one compared to that in FIG the other areas of ent. speaking boom existing strength is reduced very low value.
- the material strength in the heated deformation area should therefore be reduced at least in places to 0 N / mm 2 .
- the diaphragm spring can be at least partially blasted relative to one another prior to the alignment of the cantilevers.
- the zones to be heated Booms can be positioned in such a way that the diaphragm spring is at least partially warmed up. This warming is due to the heat that radiates from the heated areas due to the conductivity of the material into the elastically deformable or resilient areas of the diaphragm. These areas can be formed, for example, by an annular base body of a plate spring.
- the method can advantageously be used in the case of disc springs which have an annular base body which serves as an energy store and which has integrally molded cantilevers on its radially inner and / or on its radially outer peripheral region, e.g. in the form of tongues. These cantilevers can extend in the radial direction and / or in the circumferential direction.
- Such a plate spring or at least its ring-shaped base body can advantageously be set up conically in the unstressed state. It can be particularly expedient if tongues which point radially inwards and are formed on the base body and which separate radially extending recesses, such as slots.
- all cantilevers can be specifically heated in a predetermined area, that is to say in a limited zone, and deformed together.
- a predetermined area that is to say in a limited zone
- at least individual cantilevers have a course offset from the other cantilevers, at least over a portion of their longitudinal extent, this course being able to be generated or corrected using the method according to the invention.
- the boom areas to be heated are heated to a temperature between 600 and 950 °, preferably to a temperature in the order of approximately 850 °.
- the above-mentioned temperatures are to be considered in connection with diaphragm springs made of steel. Depending on the material, however, higher or lower temperatures may also be appropriate.
- the methods according to the invention can be used both on the diaphragm spring itself, that is to say on the individual component, and also on diaphragm springs which are each installed in a structural unit, such as, for example, in a friction clutch. When using membrane springs of this type in friction clutches, the latter can be fully assembled or only partially when the corresponding method is used.
- the diaphragm spring can only be pivotally connected to the clutch housing.
- the corresponding method is used for fully assembled friction clutches.
- the diaphragm spring or the plate spring has a tensioned position which corresponds at least approximately to the position which the spring assumes when the clutch is installed in the vehicle. This can be done by appropriately positioning the thrust washer in relation to the housing, since this braces the plate spring.
- the areas to be heated can advantageously be heated inductively.
- Inductive heating can take place with a rotating workpiece and / or rotating coil.
- the coil generates an alternating magnetic field, through which eddy currents are induced in the workpiece, which cause a rapid rise in temperature.
- burner heating can also take place, that is to say heating by means of a flame.
- at least two coils are provided, one heating the areas for straightening the cantilevers and the other serving to heat and harden the free cantilever tips.
- a very rapid cooling or quenching in the area of the cantilever tips can achieve a hardness that is higher than that which is present in the other areas of the cantilever and / or the entire diaphragm spring.
- FIG. 1 shows a section through a device for performing the method.
- Figures 2 to 4 individual phases of the process or process flow and Figures 5 to 7 a plate spring, which is installed in Figure 7 in a friction clutch.
- the device 1 for performing the inventive method consists of a lower part 2 and an upper part 3 or vice versa, which are housed in a self-contained frame, which is not fully shown.
- Part of the top plate 4 is of the frame can be seen, which is connected via tie rods 5 to a lower plate, not shown.
- the upper part 3 is fastened to the upper plate 4.
- the lower part 2 is axially displaceable axially relative to the upper part 3 via a drive, such as a hydraulic cylinder 6, of which only the piston rod can be seen.
- the lower part 2 and the upper part 3 are connected or guided in a rotationally fixed manner via guide columns 7 and guide sleeves or guide bearings 8, but can be displaced axially relative to one another.
- the lower part 2 has a receiving plate 9 which can be acted upon by the hydraulic cylinder 6 and carries the guide bearing 8.
- a bearing receiving ring 10 is also provided, which is axially supported on the receiving plate 9 and receives a bearing 11 - here in the form of a ball bearing.
- a receiving device 12 is supported on the receiving plate 9 via the bearing 11. The receiving device 12 can be rotated relative to the receiving plate 9 via the bearing 11.
- the receiving device 12 consists of at least one ring-shaped ring 13 which carries a plurality of clamping elements distributed over the circumference in the form of clamping bolts 14.
- At least some of the clamping bolts receive centering means in the form of centering pins 15, which are preferably axially retractable, at least partially, in the clamping bolts, each against the action of an energy store, which can be formed, for example, by a helical spring 16.
- a straightening device 17 is also arranged with a straightening cylinder 18, which can axially shift or act on a straightening punch 19, which in the present case consists of several assembled components.
- the Straightening stamp 19 is axially displaceable in a guide receptacle 20, which also here consists of several assembled components, and is guided without or practically without the possibility of tilting.
- the guide receptacle 20 has a cup-shaped component 21 which at least partially receives or overlaps the straightening cylinder 18 and is firmly connected to the receiving plate 9.
- the upper part 3 also has a receiving plate 22, on which a bearing receiving ring 23 is fastened, which carries a bearing in the form of a rolling bearing 24.
- a support device 25, which consists of a plurality of disks or rings, is axially supported on the receiving plate 22 and is rotatably supported relative to the bearing 24.
- the bearings 11 and 24 are arranged coaxially to one another, so that the receiving device 12 and the support device 25 can rotate coaxially with one another.
- the support device 25 has a pulley 26 which can be rotated via a belt 27 and a drive motor 28.
- the device 1 also has a heating or heating device 29, which is used for at least partial heating of cantilevers of a component, such as in particular a membrane spring, the alignment of the cantilevers being made possible by the interaction of the heating device and the other components of the device 1 as will be described in more detail below.
- the heating device consists of an annular induction coil 29.
- the device 1 serves to align the individual arms of a diaphragm spring relative to one another, in the present case this diaphragm spring being formed by the plate spring 30 of a friction clutch 31.
- the plate spring 30 has an annular base body 32, from which radially inwardly directed tongues 33 extend, which delimit a central recess 34.
- the individual plate spring tongues 33 are separated from one another by slots 35, which are connected radially on the inside to the central recess 34 and open radially on the outside into perforated extensions 36 which adjoin the annular base body 32.
- the fully excellent position of the plate spring 30 corresponds to the fully relaxed state of this plate spring.
- the plate spring tongues 33 are bent or kinked and the radially inner tongue tips 37 are dome-shaped.
- the friction clutch 31 can be mounted on a counter pressure disk, such as a flywheel 38, the friction linings of a clutch disk 40 being clampable between the counter pressure disk 38 and the pressure disk 39 of the friction clutch 31.
- the thrust washer 39 is acted upon by the plate spring 30 in a manner known per se.
- the Disc spring 30 is pivotally mounted on clutch housing 41 in a manner known per se, in the exemplary embodiment shown in the manner of a two-armed lever.
- Such friction clutches are known for example from US-PS 5301782 and DE-OS 4434019.
- the invention can also be used in so-called drawn couplings, as are known for example from US Pat. No. 4,909,370 and DE-OS 4237 623.
- the friction clutch consisting of at least pressure plate 39, plate spring 30 and housing 41 is inserted into device 1.
- the friction clutch is received with the pressure plate 39 pointing upward in the device 1, the tongue tips 37 being axially supported on the straightening plunger 19 in the illustrated embodiment.
- the radial positioning or centering of the friction clutch 31 takes place in the illustrated embodiment via the clutch housing 41, which has recesses on its outer edge 42, into which centering pins 15 engage axially. It is expedient if at least two centering pins 15 are provided.
- Centering pins are provided, it may be advantageous if there are three such centering pins which, as already described, are axially displaceably received in the clamping elements in the form of clamping bolts 14.
- the number of clamping elements 14 should be at least three, it may be advantageous if there are 6 such clamping elements, which can be distributed uniformly over the circumference.
- the lower part 2 is moved upwards by means of the drive or hydraulic cylinder 6, the thrust washer 39 and the centering pins 15 first coming into contact with the upper part 3.
- the individual components 39, 15 can be placed against the upper part 3 practically simultaneously or at different times.
- the corresponding position is shown in Figure 3.
- the centering pins 15 plunge axially into the corresponding clamping elements 14, these clamping elements 14 coming into contact with the clutch housing or clutch cover 41 after passing through a certain path.
- the housing 41 is displaced axially in the direction of the fixed thrust washer, until this housing 41 comes to rest against an adjusting element in the form of an adjusting ring 43 carried by the upper part 3.
- the straightening cylinder 18 or the straightening plunger 19 can also be in a retracted position during the raising of the lower part 2 and only after the lower part 2 and the upper part 3 have moved together, the straightening cylinder 18 or the straightening punch 19 into the desired axial position can be brought.
- a displacement and / or force measurement can be carried out at the same time, which enables a conclusion to be drawn about the actuation state of the friction clutch.
- the plate spring tongues 33 are preloaded by a certain amount compared to the nominal dimension of the desired plate spring tongue height, namely by an amount that is approximately 1.5 mm. However, this amount can also be chosen to be larger or smaller. The preload However, it must be done in such a way that the tongues can be straightened by reducing the bending stresses introduced into them.
- the receiving device 12 and the supporting device 25 are made to rotate by means of a drive 27 and 28, the induction coil 29 being activated simultaneously or shortly before or shortly thereafter, as a result of which the adjacent areas 44 of the plate spring tongues 33 are heated to the desired temperature, which is preferably of the order of 850 ° C., at least in places.
- the desired temperature which is preferably of the order of 850 ° C., at least in places.
- the areas 44 can be selectively cooled so that the areas 44 are hardened again.
- the areas 44 can be cooled, for example, by means of a turbine which is integrated directly into the device 1, for example in the area of the components which can be rotated by means of the drive 27 + 28.
- a blower or a turbine can also be provided which, for example, introduces cooling air through the opening 4a in the region of the upper part 3.
- the induction coil 29 is provided on the side of the plate spring 30 facing away from the cover, but the coil 29 can also be arranged on the other side of the plate spring 30 or a coil can be provided on both sides of the plate spring 30.
- the plate spring tongues 33 are already preloaded when the heating of the areas 44 begins. According to another variant, this pre-tensioning can also take place only during or shortly after the heating of the area 44. Depending on the point in time at which the tongue tips 37 are acted upon, there is no or practically no elastic or resilient tensioning of the plate spring tongues 33, since when the target temperature is reached in the regions 44, these have only very little or practically no strength.
- Such a procedure can be achieved, for example, that when the heating of the areas 44, the straightening cylinder 18 or the straightening die 19 is in a retracted position and only after reaching or shortly before the desired deformation temperature is reached again for aligning the tongues - pointed 37 required position is raised. As soon as the straightening process is completed, the rotating parts are braked or brought to a standstill and the device 1 is opened so that the friction clutch 31 can be removed.
- the radial area in which the sections 44 to be heated are located can be selected such that the heating of these sections or areas 44 simultaneously results in at least a partial setting of the plate spring 30.
- This setting is due to the fact that the heat introduced into the regions 44 has an effect at least on the inner edge region of the annular base body 32 of the plate spring 30. In the method according to the invention, a kind of warming of the plate spring can thus take place at the same time.
- a further induction coil can be provided in the device 1, which can be used for hardening the spring-loaded tongue tips 37.
- the spring-loaded tongue tips 37 become harder than those in the other areas brought the existing spring hardness 30.
- Such a coil is indicated in FIG. 4 and labeled 45.
- the tip of the tongue can again be cooled by air or in some other way (eg liquid cooling).
- the hardening of the tongue tips 37 can take place at the same time as the heating and hardening of the areas 44 or only after or before.
- this straightening die 19 has at least one component, for example in the form of a disk 19a, which is made of a non-conductive or non-magnetizable material - such as, for example ceramic material - consists.
- the material should have a very low thermal conductivity.
- the tongues 33 can be aligned with respect to one another by correspondingly redesigning the device 1, even on the diaphragm spring or plate spring 30 alone.
- the method according to the invention can also be used in membranes in which cantilevers or Tongues are present which have a different course over at least part of their extent or whose tongue tips have a different height, that is to say are offset from one another.
- membrane springs are known for example from DE-OS 19524827, DE-PS 3643781, DE-OS 3528660, DE-OS 3513315 and DE-OS 2460963.
- the individual tongue tips 37 can be brought into a height range with a maximum bandwidth of ⁇ 0.3 mm in relation to a desired reference height.
- a bandwidth of ⁇ 0.2 mm or even smaller can be kept.
- this offset can be achieved by mechanical processing, such as by grinding the tongue tips 37 , at least be further reduced.
- mechanical processing such as by grinding the tongue tips 37 .
- This ensures with a friction clutch that when the friction clutch is actuated, an even more uniform introduction of the disengagement force is ensured by means of the tongues 33 in the annular base body 32.
- this is for the release bearing of the releaser which engages the tongue tips 37 and which is used to actuate the friction clutch 31 is necessary, advantageous since the bearing is loaded more evenly and thus practically no tilting forces act on the releaser.
- Disc springs 30 with aligned tongue tips 37 can be used in a particularly advantageous manner in connection with friction clutches, which have a readjustment mechanism that compensates for the wear of the friction linings.
- friction clutches are known for example from DE-OS 4 239 291, DE-OS 4 306 505, DE-OS 4 239 289, DE-OS 4 322 677 and DE-OS 4 412 107.
- the device 1 is constructed such that the friction clutch or the plate spring rotates at least during the heating of the corresponding tongue areas.
- the device 1 can, however, also be constructed in such a way that the coupling or the plate spring does not rotate during the corresponding heat treatment and instead the coil 29 and / or the coil 45, that is to say the heating means, rotate.
- a pressure piece (as known for example from DE-OS 34 24 227 and US Pat. No. 2,835,366) or a release bearing (as for example through DE-OS) can be provided on the tongue tips 37 23 27 937 known) may already be installed.
- a pressure piece as known for example from DE-OS 34 24 227 and US Pat. No. 2,835,366
- a release bearing (as for example through DE-OS) can be provided on the tongue tips 37 23 27 937 known) may already be installed.
- the invention is not restricted to the exemplary embodiment of the description.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Springs (AREA)
- Vehicle Body Suspensions (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/147,775 US6185976B1 (en) | 1997-06-27 | 1998-06-29 | Method for adjusting a diaphragm spring |
JP11505217A JP2000517043A (ja) | 1997-06-27 | 1998-06-29 | ダイヤフラムばねを調整するための方法 |
GB9904115A GB2332716B (en) | 1997-06-27 | 1998-06-29 | Method for adjusting a diaphragm spring |
AU89724/98A AU8972498A (en) | 1997-06-27 | 1998-06-29 | Method for adjusting a diaphragm spring |
DE19881093T DE19881093D2 (de) | 1997-06-27 | 1998-06-29 | Verfahren zum Richten einer Membranfeder |
BR9806102-0A BR9806102A (pt) | 1997-06-27 | 1998-06-29 | Processo para o ajuste de uma mola de membrana. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19727280.0 | 1997-06-27 | ||
DE19727280 | 1997-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999000606A1 true WO1999000606A1 (de) | 1999-01-07 |
Family
ID=7833783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001852 WO1999000606A1 (de) | 1997-06-27 | 1998-06-29 | Verfahren zum richten einer membranfeder |
Country Status (12)
Country | Link |
---|---|
US (1) | US6185976B1 (de) |
JP (1) | JP2000517043A (de) |
KR (1) | KR100567871B1 (de) |
CN (1) | CN1126878C (de) |
AU (1) | AU8972498A (de) |
BR (1) | BR9806102A (de) |
CA (1) | CA2263986A1 (de) |
DE (2) | DE19881093D2 (de) |
FR (1) | FR2765291B1 (de) |
GB (1) | GB2332716B (de) |
RU (1) | RU2216420C2 (de) |
WO (1) | WO1999000606A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101415855B (zh) | 2006-04-13 | 2011-12-28 | 空中客车德国有限公司 | 型材的热处理方法、用于型材热处理的装置及型材 |
CN102626859B (zh) * | 2012-04-18 | 2014-01-15 | 合肥工业大学 | 汽车膜片弹簧离合器分离指跳动校正及检测方法 |
CN102626858B (zh) * | 2012-04-18 | 2014-04-30 | 合肥工业大学 | 汽车膜片弹簧离合器分离指跳动校正及检测装置 |
CN103785711B (zh) * | 2014-01-02 | 2015-12-09 | 浙江龙华汽配制造有限公司 | 一种膜片弹簧的压平机 |
CN105880916A (zh) * | 2014-12-05 | 2016-08-24 | 安顺市晶英科技研发有限责任公司 | 一种避震器弹簧组件的整形装置 |
FR3049020B1 (fr) * | 2016-03-21 | 2019-06-14 | Valeo Embrayages | Diaphragme pour un mecanisme d'embrayage a friction |
CN108907059A (zh) * | 2018-08-17 | 2018-11-30 | 桂林福达股份有限公司 | 一种支承环限位装置 |
CN109014013B (zh) * | 2018-10-18 | 2024-03-22 | 无锡市星达石化配件有限公司 | 一种快速冷却的法兰锻造装置 |
CN112589380B (zh) * | 2020-11-16 | 2023-02-03 | 长春一东离合器股份有限公司 | 离合器弯指膜片弹簧指端成型方法 |
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DE2229028A1 (de) * | 1971-06-15 | 1973-01-04 | Ferodo Sa | Bauteil aus stahl elastischer natur, insbesondere kupplungsmembran, und verfahren zu dessen herstellung |
DE2543693A1 (de) * | 1974-10-02 | 1976-04-08 | Daikin Mfg Co Ltd | Membranfeder fuer membranfeder- kupplungen von kraftfahrzeugen |
JPS60187698A (ja) * | 1984-03-05 | 1985-09-25 | Aisin Seiki Co Ltd | ダイヤフラム式スプリングの脱水素処理方法 |
DE4107964A1 (de) * | 1991-03-13 | 1992-09-17 | Fichtel & Sachs Ag | Verfahren und anordnung zum justieren der federzungen der membranfeder einer kraftfahrzeug-reibungskupplung |
DE4444649A1 (de) * | 1993-12-27 | 1995-06-29 | Luk Lamellen & Kupplungsbau | Scheibenförmiges Bauteil |
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US3753798A (en) * | 1969-01-25 | 1973-08-21 | Toyoda Chuo Kenkyusho Kk | Process and apparatus for the partial or localized tempering of a steel sheet-or the like stock |
GB1384249A (en) * | 1971-06-25 | 1975-02-19 | Gkn Transmissions Ltd | Manufacture of diaphragm springs |
DE3226543A1 (de) * | 1982-07-15 | 1984-01-19 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum justieren von feinwerktechnischen teilen |
JPS60121217A (ja) * | 1983-12-01 | 1985-06-28 | Atsugi Motor Parts Co Ltd | 皿ばね部材の製造方法 |
US5588200A (en) * | 1995-05-15 | 1996-12-31 | K. R. Precision Public Company Limited | Tightened distribution of magnetic-head suspension-assembly static roll by infrared stress relief |
US5769973A (en) * | 1995-11-09 | 1998-06-23 | Smith, Jr.; Robert P. | High performance automotive clutch with modified pressure plate for sustained increased spring force |
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1998
- 1998-06-26 FR FR9808125A patent/FR2765291B1/fr not_active Expired - Fee Related
- 1998-06-29 GB GB9904115A patent/GB2332716B/en not_active Expired - Fee Related
- 1998-06-29 KR KR1019997001552A patent/KR100567871B1/ko not_active IP Right Cessation
- 1998-06-29 BR BR9806102-0A patent/BR9806102A/pt not_active IP Right Cessation
- 1998-06-29 RU RU99106150/02A patent/RU2216420C2/ru not_active IP Right Cessation
- 1998-06-29 JP JP11505217A patent/JP2000517043A/ja not_active Ceased
- 1998-06-29 CN CN98800910A patent/CN1126878C/zh not_active Expired - Fee Related
- 1998-06-29 DE DE19881093T patent/DE19881093D2/de not_active Expired - Fee Related
- 1998-06-29 WO PCT/DE1998/001852 patent/WO1999000606A1/de active IP Right Grant
- 1998-06-29 DE DE19828865A patent/DE19828865A1/de not_active Withdrawn
- 1998-06-29 CA CA002263986A patent/CA2263986A1/en not_active Abandoned
- 1998-06-29 AU AU89724/98A patent/AU8972498A/en not_active Abandoned
- 1998-06-29 US US09/147,775 patent/US6185976B1/en not_active Expired - Fee Related
Patent Citations (5)
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DE2229028A1 (de) * | 1971-06-15 | 1973-01-04 | Ferodo Sa | Bauteil aus stahl elastischer natur, insbesondere kupplungsmembran, und verfahren zu dessen herstellung |
DE2543693A1 (de) * | 1974-10-02 | 1976-04-08 | Daikin Mfg Co Ltd | Membranfeder fuer membranfeder- kupplungen von kraftfahrzeugen |
JPS60187698A (ja) * | 1984-03-05 | 1985-09-25 | Aisin Seiki Co Ltd | ダイヤフラム式スプリングの脱水素処理方法 |
DE4107964A1 (de) * | 1991-03-13 | 1992-09-17 | Fichtel & Sachs Ag | Verfahren und anordnung zum justieren der federzungen der membranfeder einer kraftfahrzeug-reibungskupplung |
DE4444649A1 (de) * | 1993-12-27 | 1995-06-29 | Luk Lamellen & Kupplungsbau | Scheibenförmiges Bauteil |
Non-Patent Citations (1)
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PATENT ABSTRACTS OF JAPAN vol. 010, no. 036 (C - 328) 13 February 1986 (1986-02-13) * |
Also Published As
Publication number | Publication date |
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DE19828865A1 (de) | 1999-02-04 |
FR2765291B1 (fr) | 2001-03-30 |
GB2332716A (en) | 1999-06-30 |
RU2216420C2 (ru) | 2003-11-20 |
DE19881093D2 (de) | 2000-01-05 |
BR9806102A (pt) | 1999-08-31 |
AU8972498A (en) | 1999-01-19 |
CA2263986A1 (en) | 1999-01-07 |
KR20000068351A (ko) | 2000-11-25 |
GB9904115D0 (en) | 1999-04-14 |
CN1126878C (zh) | 2003-11-05 |
FR2765291A1 (fr) | 1998-12-31 |
US6185976B1 (en) | 2001-02-13 |
CN1231023A (zh) | 1999-10-06 |
GB2332716B (en) | 2002-08-07 |
JP2000517043A (ja) | 2000-12-19 |
KR100567871B1 (ko) | 2006-04-04 |
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