WO2001086157A1 - Hydraulisches gerät - Google Patents
Hydraulisches gerät Download PDFInfo
- Publication number
- WO2001086157A1 WO2001086157A1 PCT/EP2001/004749 EP0104749W WO0186157A1 WO 2001086157 A1 WO2001086157 A1 WO 2001086157A1 EP 0104749 W EP0104749 W EP 0104749W WO 0186157 A1 WO0186157 A1 WO 0186157A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thread
- screw
- screw part
- hydraulic device
- pitch
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims description 2
- 238000010000 carbonizing Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 239000004519 grease Substances 0.000 abstract description 4
- 230000005489 elastic deformation Effects 0.000 abstract 1
- 238000004886 process control Methods 0.000 abstract 1
- 239000011295 pitch Substances 0.000 description 17
- 239000003921 oil Substances 0.000 description 8
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000915 Free machining steel Inorganic materials 0.000 description 1
- 238000005256 carbonitriding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/30—Locking exclusively by special shape of the screw-thread
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
Definitions
- the invention is based on a hydraulic device, e.g. from a hydraulic valve or a hydraulic pump, the hydraulic device being a nut part, e.g. a housing or a control piston, with a screw hole, which has an internal thread with a certain nominal diameter and with a certain uniform pitch, and a screw part, which has an external thread with the nominal diameter of the screw hole and with a certain uniform pitch, and that in the screw hole is screwed in.
- a hydraulic device e.g. from a hydraulic valve or a hydraulic pump
- the hydraulic device being a nut part, e.g. a housing or a control piston, with a screw hole, which has an internal thread with a certain nominal diameter and with a certain uniform pitch, and a screw part, which has an external thread with the nominal diameter of the screw hole and with a certain uniform pitch, and that in the screw hole is screwed in.
- the invention is therefore based on the object of further developing a hydraulic device with the features from the preamble of claim 1 in such a way that the screw part is secured in a simple manner in the screw-in hole without adhesive.
- the desired aim is achieved according to the invention in a hydraulic device according to the preamble of patent claim 1 in that, according to the characterizing part of this patent claim 1, there is a slight difference between the pitch of the internal thread of the nut part and the pitch of the external thread of the screw part.
- the difference is chosen taking into account the interlocking thread turns after screwing in the screw part so that individual turns are not permanently but elastically deformed. These elastically deformed windings elastically clamp the external and internal threads against one another, so that the screw part is secured to one another by the forces exerted by the elastically deformed windings.
- the screw-in part is a nozzle body in which there is a risk of blockage when using adhesive.
- the difference between the slope of the nut part and the slope of the screw-in part is preferably in the range of 15% to 10% of an average between the two slopes.
- nozzles have mainly been made of brass, a material in which even holes with a very small diameter between 0.5 and 1.5 mm can be drilled relatively easily.
- brass is not very elastic.
- the screw-in part is manufactured from a steel, in particular from an automatic steel. This steel has a high elasticity and is also reasonably easy to machine.
- screw parts have been used for hydraulic devices, which have a screw shaft carrying the external thread and a screw head and which have been screwed into the nut part until the screw head rests on it. If the threads are equipped with different pitches according to the invention, then thread turns are plastically deformed quickly beyond the elastic limit if the screw part is turned further beyond the contact of the screw head. This will lose the screw lock. It is therefore provided according to claim 5 that to limit the screwing-in movement of the screw-in part, one of the two threads has an outlet section in which the depth of the thread groove decreases steadily. As soon as the mating thread engages in the outlet section of the one thread, the torque required for screwing in rises sharply without permanent deformation of at least the thread turns located outside the outlet section taking place.
- the head increases in diameter from the shaft over a certain axial length. This increase takes place preferably in the form of a truncated cone.
- the internal thread of the nut part and the external thread of the screw-in part are metric threads with a diameter of 4 mm
- the pitch of the first thread preferably the pitch of the internal thread
- the pitch of the second thread differs from the pitch of the first thread by 0.05 mm
- the engagement length between the two threads is approximately 4 mm.
- the screw-in part is hardened on its surface and, according to claim 11, is provided with an oxide protective layer which acts as rust protection.
- FIG. 1 shows a section of the main stage of the pressure relief valve according to the invention, in which a nozzle as
- FIG. 2 is an enlarged representation of the area from FIG. 1 in which the nozzle is located
- FIG. 3 is a further enlarged detail from FIG. 2, with a clearer representation of the interlocking threads
- FIG. 4 shows an alternative to the design of the outlet section of the thread of the nozzle, as can be seen in FIG. 3.
- a housing 10 from a cast iron in a bore holds a sleeve 11 in which a main cone 12 is guided and on which a seat 13 for the main cone is formed.
- the main cone 12 is acted upon by a relatively weak compression spring 14, which is located in a rearward control chamber 15 filled with control oil, in the direction of the valve seat 12.
- the housing of the pilot valve 16 which is only shown in its circuit diagram, is seated on the housing 10. Insofar as the constructional details of the pressure relief valve are not shown, it can be found in the data sheet RD 25 802 / 01.99 by the applicant.
- the pressure to be limited is present in an inlet channel 17 of the housing 10 and on the end face of the main cone 12 facing it. When the latter lifts off the seat 13, pressure fluid can flow from the inlet channel 17 through the front opening and through radial bores of the sleeve 11 into an outlet channel 18 of the housing 10 and from there to a tank.
- Channels which are part of a control oil flow path, still run in the housing 10.
- a control bore 19 radially extending from the inlet channel 17, into which a control oil nozzle 20 is screwed and which eccentrically merges into a larger transverse bore 22 which is closed to the outside by a plug 21.
- a bore 23 running parallel to the axis of the sleeve 11 leads to the inlet of the pilot valve 16.
- the control chamber 15 is also connected to this inlet via a line 24. From the outlet of the pilot valve, a line leads, in which a bore 25 of the housing 10, which runs parallel to the sleeve 11, also leads into the outlet 18 thereof.
- the nozzle 20 is screwed into the bore 19.
- this hole is provided over a certain distance from the larger transverse bore 22 with a metric internal thread which has a nominal diameter of 4 mm and a pitch of 0.70 mm.
- the internal thread is an M4 x 0.70 thread.
- the nozzle or more precisely, the nozzle body 20 has a screw shaft 31 and a screw head 32, the diameter of which, starting from the screw shaft, initially increases linearly in the manner of a truncated cone with an opening angle of 30 degrees and then remains constant over a short distance.
- a frustoconical section 33 and a circular cylindrical section 34 can be distinguished from one another.
- the nozzle body 20 On the screw shaft, the nozzle body 20 carries an external thread 35 which, like the internal thread 30, is an M4 thread, the pitch of which, however, is not 0.70 mm but 0.75 mm, that is to say slightly larger than the pitch of the internal thread 30.
- the screw shank and screw head merge into one another without any recess.
- the thread 35 does not run out in one recess. Rather, at a short distance from the head 32, the thread groove gradually becomes less deep and finally ends completely in the shaft 31. This is achieved in that when the thread is cut, the cutting tool with further turning and wide rer axial movement of the nozzle body is withdrawn radially.
- FIG. 3 shows how the thread groove 36 has become flatter near the head 32. If the speed of the axial movement of the nozzle body is the same as when cutting the thread in front of the outlet section while the cutting tool is being pulled out, there is also the same distance between the thread turns in the outlet as in the regular part of the thread. The thread comb is then not pointed in the outlet, but flat, as can be seen from FIG. 3 at 37.
- the difference between the pitch of the internal thread 30 and the external thread 35 entails that when the nozzle body 20, which may be referred to as a screw part, is screwed into the bore 19, which may be referred to as a screw-in hole, only the foremost threaded thread at one point bears against a turn of the internal thread if a certain pressure is exerted on the nozzle body 20 during screwing. Without this pressure, the rearmost thread thread of the nozzle body 20, which is in engagement with the internal thread 30, bears against the internal thread 30 at one point. If the nozzle body 20 is screwed far enough into the bore 19, a further thread threading - but with the opposite flank - abuts against a flank of the internal thread 30. This state is shown in FIG. 3.
- the special shape of the head 32 does not give the fitter the feeling that the nozzle body 20 to an axial stop and then have to tighten with a high torque, which would entail the risk of permanent deformation of the thread.
- the nozzle body 20 is made of free-cutting steel which has good elastic properties and can still be machined well, in particular in order to be able to drill the very small nozzle bore 40.
- the nozzle body 20 On its surface, the nozzle body 20 is hardened in particular by carbonitriding, so that the risk is low that when screwing in, particles are scraped off from the thread turns, which could get into the hydraulic circuit.
- the nozzle body 20 is provided with an oxide protective layer on its surface.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01940373A EP1287264B1 (de) | 2000-05-12 | 2001-04-27 | Hydraulisches gerät |
DE50111042T DE50111042D1 (de) | 2000-05-12 | 2001-04-27 | Hydraulisches gerät |
US10/258,562 US6843508B2 (en) | 2000-05-12 | 2001-04-27 | Hydraulic device |
JP2001582730A JP5430811B2 (ja) | 2000-05-12 | 2001-04-27 | 油圧装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10023388.0 | 2000-05-12 | ||
DE10023388A DE10023388A1 (de) | 2000-05-12 | 2000-05-12 | Hydraulisches Gerät |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001086157A1 true WO2001086157A1 (de) | 2001-11-15 |
Family
ID=7641858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/004749 WO2001086157A1 (de) | 2000-05-12 | 2001-04-27 | Hydraulisches gerät |
Country Status (6)
Country | Link |
---|---|
US (1) | US6843508B2 (de) |
EP (1) | EP1287264B1 (de) |
JP (1) | JP5430811B2 (de) |
AT (1) | ATE340310T1 (de) |
DE (2) | DE10023388A1 (de) |
WO (1) | WO2001086157A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100379194B1 (en) * | 2001-10-31 | 2003-04-08 | U & I Co Ltd | Apparatus for fixing bone |
DE10238832A1 (de) * | 2002-08-23 | 2004-03-04 | Hydac Electronic Gmbh | Schraubensicherung |
US7614453B2 (en) * | 2006-06-01 | 2009-11-10 | Cameron International Corporation | Stress distributing wellhead connector |
DE102006033704B3 (de) * | 2006-07-20 | 2008-01-03 | Kathrein-Werke Kg | Hochfrequenzfilter in koaxialer Bauweise, insbesondere nach Art einer Hochfrequenzweiche (z.B. einer Duplex-Weiche) oder eines Bandpassfilters oder Bandsperrfilters |
DE202009016968U1 (de) | 2009-12-16 | 2010-03-18 | Metso Paper, Inc. | Steuervorrichtung |
DE202012009154U1 (de) * | 2012-09-21 | 2012-10-31 | Mwm Gmbh | Verbindungselement mit spezieller Gewindesteigung |
US9297152B2 (en) * | 2013-06-20 | 2016-03-29 | Kerei Alexander | Internally mountable water flow device |
DE102014204912A1 (de) * | 2014-03-17 | 2015-09-17 | Siemens Aktiengesellschaft | Verfahren zum Verschließen eines Loches und Bauteil |
US10088104B2 (en) * | 2014-07-28 | 2018-10-02 | Quantum Fuel Systems Llc | Composite pressure tank boss mounting with pressure relief |
JP6522471B2 (ja) * | 2015-09-14 | 2019-05-29 | Kyb株式会社 | 減速機 |
DE102019001871A1 (de) * | 2019-03-16 | 2020-09-17 | Hydac Fluidtechnik Gmbh | Verbindungsvorrichtung |
EP3809001B1 (de) | 2019-08-30 | 2022-04-27 | Nakaya Seisakusho Co., Ltd. | Schraube-mutter |
Citations (6)
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DE2156623A1 (de) * | 1971-11-15 | 1973-05-24 | Adam Dipl Ing Elmer | Kolbenstangenfuehrungsbuchse aus thermoplastischem kunststoff |
US4266590A (en) * | 1979-04-09 | 1981-05-12 | Microdot Inc. | Prevailing torque nut |
US4840526A (en) * | 1986-04-17 | 1989-06-20 | Framatome | Gripping device for tensioning screwing elements |
US4958973A (en) * | 1988-03-23 | 1990-09-25 | Nobuyuki Sugimura | Internal-pressure-bearing female screw |
US5221113A (en) * | 1991-04-09 | 1993-06-22 | Festo K.G. | Male and female screw threads, more especially for pneumatic equipment |
DE29721155U1 (de) * | 1997-11-28 | 1998-01-15 | Heinrichs & Co Schrauben Und D | Selbstsicherndes Bolzengewinde |
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DE7328919U (de) * | 1974-01-10 | Weiss R | Sicherungsmutter | |
US597000A (en) * | 1898-01-11 | Screw union or coupling | ||
US1922689A (en) | 1931-07-11 | 1933-08-15 | Hans G H Linnenbruegge | Method of forming screw-threaded members |
FR1111508A (fr) | 1952-06-20 | 1956-03-01 | Perfectionnements aux pièces filetées | |
US2804928A (en) * | 1953-06-15 | 1957-09-03 | Phillips Petroleum Co | Casing running choke |
US3079181A (en) * | 1956-05-03 | 1963-02-26 | Shell Oil Co | Box-and-pin-type threaded joint having different pitches and pitch diameters |
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-
2000
- 2000-05-12 DE DE10023388A patent/DE10023388A1/de not_active Withdrawn
-
2001
- 2001-04-27 AT AT01940373T patent/ATE340310T1/de active
- 2001-04-27 WO PCT/EP2001/004749 patent/WO2001086157A1/de active IP Right Grant
- 2001-04-27 DE DE50111042T patent/DE50111042D1/de not_active Expired - Lifetime
- 2001-04-27 US US10/258,562 patent/US6843508B2/en not_active Expired - Lifetime
- 2001-04-27 JP JP2001582730A patent/JP5430811B2/ja not_active Expired - Fee Related
- 2001-04-27 EP EP01940373A patent/EP1287264B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2156623A1 (de) * | 1971-11-15 | 1973-05-24 | Adam Dipl Ing Elmer | Kolbenstangenfuehrungsbuchse aus thermoplastischem kunststoff |
US4266590A (en) * | 1979-04-09 | 1981-05-12 | Microdot Inc. | Prevailing torque nut |
US4840526A (en) * | 1986-04-17 | 1989-06-20 | Framatome | Gripping device for tensioning screwing elements |
US4958973A (en) * | 1988-03-23 | 1990-09-25 | Nobuyuki Sugimura | Internal-pressure-bearing female screw |
US5221113A (en) * | 1991-04-09 | 1993-06-22 | Festo K.G. | Male and female screw threads, more especially for pneumatic equipment |
DE29721155U1 (de) * | 1997-11-28 | 1998-01-15 | Heinrichs & Co Schrauben Und D | Selbstsicherndes Bolzengewinde |
Also Published As
Publication number | Publication date |
---|---|
US20030103832A1 (en) | 2003-06-05 |
DE50111042D1 (de) | 2006-11-02 |
US6843508B2 (en) | 2005-01-18 |
ATE340310T1 (de) | 2006-10-15 |
JP5430811B2 (ja) | 2014-03-05 |
JP2003532849A (ja) | 2003-11-05 |
EP1287264B1 (de) | 2006-09-20 |
EP1287264A1 (de) | 2003-03-05 |
DE10023388A1 (de) | 2001-11-15 |
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