[go: up one dir, main page]

EP3359793A1 - Piston pourvu d'un filetage extérieur - Google Patents

Piston pourvu d'un filetage extérieur

Info

Publication number
EP3359793A1
EP3359793A1 EP16778805.8A EP16778805A EP3359793A1 EP 3359793 A1 EP3359793 A1 EP 3359793A1 EP 16778805 A EP16778805 A EP 16778805A EP 3359793 A1 EP3359793 A1 EP 3359793A1
Authority
EP
European Patent Office
Prior art keywords
piston
combustion engine
internal combustion
support
external thread
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.)
Withdrawn
Application number
EP16778805.8A
Other languages
German (de)
English (en)
Inventor
Matthias Laqua
Alexander SCHÄFER
Wolfgang Köhler
Dieter Krämer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KS Kolbenschmidt GmbH
Original Assignee
KS Kolbenschmidt GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KS Kolbenschmidt GmbH filed Critical KS Kolbenschmidt GmbH
Publication of EP3359793A1 publication Critical patent/EP3359793A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid

Definitions

  • the invention relates to a piston of an internal combustion engine according to the features of the preamble of the independent claim.
  • Pistons in particular large-displacement pistons, which have an upper part and a lower part and which are connected to one another by means of a screw connection
  • large piston is given a flat surface between the upper part and lower part, on which the upper part is supported on the lower part when the screw, for example, designed as an expansion screw, is connected.
  • tension can result as a result of changing temperatures and pressures, so that such a screw connection, especially centrally in the area of the piston stroke axis, is disadvantageous.
  • the invention is therefore an object of the invention to provide a piston with which cost the producible and the variety of parts can be reduced and works properly in operation in the internal combustion engine.
  • an external thread is arranged between the lower part and the upper part of the piston, with which these two parts are connected to one another by screwing.
  • This external thread is present concentrically around the Kolbenhubachse around the two parts of the piston, so that they are connected by screwing together to realize a ready piston, especially a large piston.
  • external thread is to be understood as meaning that the mutually corresponding regions of the upper part and the lower part which are to be screwed together have mutually corresponding threads
  • the term “external thread” should also clarify that it is not a thread or thread is a screw in the range of Kolbenhubachse, but that this thread for screwing of the upper part and lower part is formed and arranged concentrically around the Kolbenhubachse.
  • At least two Abstützeptin between the lower part and the upper part are provided.
  • a bearing surface of the lower part corresponds to a bearing surface of the upper part, but that at least two mutually separate bearing surfaces are respectively provided on the lower part and respectively on the upper part.
  • the areas of upper part and lower part, which are to be supported against each other during operation of the piston are optimally matched to each other.
  • These at least two flat support areas can be designed such that at least one of the mutually facing support areas rest on each other over their entire area (both in the static state of the piston and during operation), in which case all the support surfaces can rest on one another.
  • At least one nut is provided for maintaining the prestress between the lower part and the upper part of the piston during operation of the internal combustion engine.
  • This nut can be supported in a further embodiment by a plate spring.
  • the diaphragm spring creates a third support when the nut is tightened against the diaphragm spring.
  • the mother and optionally the diaphragm spring does not have the task and effect of connecting the upper part with the lower part, since this is the external thread is used. Rather, the nut and optionally the disc spring have the effect that the bias voltage, in particular under formation of the gap, for example, the second support (secondary support) during operation of the internal combustion engine (engine running) is obtained.
  • the external thread is formed by a circumferential web of the upper part and a corresponding circumferential web of the lower part.
  • the facing threaded portions of the upper part and the lower part can be generally introduced with the production of these two parts. Alternatively, they can be subsequently introduced after their preparation.
  • Particularly advantageous is the design of the upper part with a circumferential, that is downwardly open circumferential web, which carries an internal thread, that is, in the direction of the piston stroke axis pointing thread.
  • the upper part of a corresponding external thread that is, a thread which points away from the Kolbenhubachse home, are screwed.
  • both parts can be screwed together, the screwing is completed when the upper part with its associated at least one support surface on the associated supporting surface of the lower part comes to rest. Thereafter, the screwing can be completed.
  • a rotation for example, a screw, a pin, a rivet or the like, which prevents the two parts of the piston to a relative movement to each other.
  • it can also be thought of permanently bonding the two parts together after completion of the screwing operation, for example by means of welding, soldering, gluing or the like.
  • FIG. 1 is a diagrammatic representation of FIG. 1:
  • FIG. 3 A sectional view of the piston according to FIG. 1 transversely to its pin axis, FIG. 3:
  • Figures 1 and 2 show a piston 1 1 in two different views, wherein the piston 1 1 is formed by a lower part 12 and a top 13. These two parts 12, 13 are in a suitable manner (eg by forging , pour or the like). The materials can be the same or different.
  • the lower part 12 has per se known elements such.
  • the upper part 13, which as well as the lower part 12 comprises a Kolbenhubachse 14, has per se known elements such as a ring field, optionally a combustion chamber trough and optionally a cooling channel 15.
  • the cooling channel 15 is present in the embodiment, but can also be omitted.
  • a main support 2 a secondary support 4 and optionally a third support 3 is provided.
  • the external thread 1 the upper part 13 and the lower part 12 are screwed together.
  • the main burden in the connection of these two parts thus carries this external thread.
  • This thread thus serves the actual holding (connect) from top 13 to bottom 12.
  • a secondary support 4 is formed which, in the static state, either abuts the associated surfaces of the two parts 12, 13 after completion of the screwing operation or forms a gap.
  • a nut 5 is still arranged in the region of the piston stroke axis 14, which can cooperate with a plate spring 6, but does not have to.
  • the nut 5 and the plate spring 6 do not have the task to connect the upper part 13 with the lower part 12, but rather to obtain the bias voltage during operation of the piston 1 1 in the internal combustion engine.
  • the lower part 12 is designed in a region 7 so that when tightening the nut 5, the region 7 is pulled (pressed) against the upper part 13.
  • the plate spring 6 can be omitted if it turns out that the bias can be applied solely by the area 7.
  • the thread of the nut 5 is as shown attached to a forged extension 8 of the upper part 13. This is only for explanation, since the extension 8 of the upper part 13 can also be replaced by a screw.
  • the upper part 13 forms a circumferential ridge 20 and corresponding thereto
  • the lower part 12 forms a circumferential ridge 21 for forming the external thread.
  • the circumferential ridge 20 is as shown in cross section in approximately rectangular and relatively thin, whereas the circumferential ridge 21 of the lower part 12 is formed solid by the lower part 12.
  • FIG. 3 shows a further exemplary embodiment of the piston 11, wherein it can be seen that the annular circumferential cooling channel 15 can have upwardly extending extension bores 16.
  • a plurality of expansion bores distributed over the circumference, starting from the cooling channel 15, are introduced into the upper part 13.
  • 17 is also an external thread (analogous to the external thread 1 in the previous embodiment), wherein here in this piston 1 1 according to Figure 3, the at least one main support 2 and the auxiliary support 4 (optionally the third support 3) are.
  • the corresponding webs 20, 21 are in turn present.
  • the piston 1 1 according to Figure 3 an inner region 18 without nut 5, without plate spring 6 and without extension 8.
  • this piston 1 1 no combustion bowl, which may be present, however, if necessary.
  • the inner region 18 is formed above the pin bore and can also be used for cooling purposes.
  • Figure 4 shows a detail of the piston 1 1, approximately corresponding to the piston 1 1 according to Figure 3, wherein still a rotation 19 between lower part 12 and upper part 13 is provided.
  • This anti-rotation 19 may be a pin, a screw, a spring-loaded pin for engagement in a recess of the opposite part or the like.
  • This is a non-positive or positive anti-rotation device 19.
  • the two parts 12, 13 also cohesively such. B. solder, weld, glue or the like are prevented from rotating against each other during operation in the internal combustion engine.
  • the upper part 13 and the lower part 12 can be manufactured on a counter-spindle machine. After machining the external thread 1, 17 (that is to say the corresponding threaded regions on the lower part 12 and the upper part 13) and optionally the inner contour (eg of the inner region 18), the two parts 12, 13 are screwed together. The fine machining, that is, the running clearance, thus takes place in the assembled state, so that no coaxiality between the upper part 13 and the lower part 12 is formed.
  • a fitting 9 can be attached to the forged extension 8 and the lower part 12, so that during operation of the piston 1 1 in the internal combustion engine, the relative movement between the upper part and lower part is as small as possible or no longer given. For this purpose, but not the rotation 19 must be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

Piston (11) pour un moteur à combustion interne, qui est constitué d'une partie inférieure (12) et d'une partie supérieure (13), et présentant une tête de piston, la partie inférieure (12) et la partie supérieure (13) étant assemblées à force et/ou par complémentarité de formes pour former le piston (11). Selon l'invention, un filetage extérieur (1, 17) est situé entre la partie inférieure (12) et la partie supérieure (13).
EP16778805.8A 2015-10-08 2016-10-07 Piston pourvu d'un filetage extérieur Withdrawn EP3359793A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015219452 2015-10-08
DE102015225952 2015-12-18
PCT/EP2016/074033 WO2017060449A1 (fr) 2015-10-08 2016-10-07 Piston pourvu d'un filetage extérieur

Publications (1)

Publication Number Publication Date
EP3359793A1 true EP3359793A1 (fr) 2018-08-15

Family

ID=57121253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16778805.8A Withdrawn EP3359793A1 (fr) 2015-10-08 2016-10-07 Piston pourvu d'un filetage extérieur

Country Status (6)

Country Link
US (2) US20180355818A1 (fr)
EP (1) EP3359793A1 (fr)
JP (1) JP6698832B2 (fr)
CN (1) CN108138692B (fr)
DE (1) DE102016119064A1 (fr)
WO (1) WO2017060449A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6698832B2 (ja) * 2015-10-08 2020-05-27 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツングＫＳ Ｋｏｌｂｅｎｓｃｈｍｉｄｔ ＧｍｂＨ 雄ねじ螺合部を備えるピストン
CN109184937B (zh) * 2018-11-13 2021-02-12 滨州渤海活塞有限公司 钢活塞
DE102019135134A1 (de) * 2019-12-19 2021-06-24 Ks Kolbenschmidt Gmbh Ölgekühlter Kolben für Brennkraftmaschinen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2159989A (en) * 1937-04-19 1939-05-30 Gen Motors Corp Welded two-piece light alloy piston

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1492294A (en) * 1921-12-10 1924-04-29 Arthur F Hanish Piston
US3465651A (en) * 1968-02-13 1969-09-09 Alco Products Inc Composite pistons
DD106677A2 (fr) * 1973-08-08 1974-06-20
JPS554359U (fr) * 1978-06-26 1980-01-12
DE3249290T1 (de) 1981-12-28 1984-01-26 Alco Power Inc., 13021 Auburn, N.Y. Zusammengesetzter kolben
JPS60178345U (ja) * 1984-05-08 1985-11-27 三菱重工業株式会社 内燃機関用ピストン
JPS60185046U (ja) 1984-05-18 1985-12-07 トヨタ自動車株式会社 機関用組立式ピストン
JPS6441649U (fr) * 1987-09-07 1989-03-13
CA2086133A1 (fr) * 1992-12-23 1994-06-24 Rex Edgell Piston pour moteur diesel alco, de serie 251
US5363822A (en) * 1993-07-09 1994-11-15 Tuohy Matthew J Assembly and method of using a multi-part piston with a removable head
DE10210570A1 (de) * 2002-03-09 2003-09-18 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10257022A1 (de) * 2002-12-06 2004-06-17 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
US20070295299A1 (en) * 2006-06-12 2007-12-27 Mahle Technology, Inc. Piston for a combustion engine
JP6698832B2 (ja) * 2015-10-08 2020-05-27 カーエス コルベンシュミット ゲゼルシャフト ミット ベシュレンクテル ハフツングＫＳ Ｋｏｌｂｅｎｓｃｈｍｉｄｔ ＧｍｂＨ 雄ねじ螺合部を備えるピストン

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2159989A (en) * 1937-04-19 1939-05-30 Gen Motors Corp Welded two-piece light alloy piston

Also Published As

Publication number Publication date
US11492996B2 (en) 2022-11-08
JP6698832B2 (ja) 2020-05-27
US20200191089A1 (en) 2020-06-18
JP2018529884A (ja) 2018-10-11
US20180355818A1 (en) 2018-12-13
CN108138692B (zh) 2022-02-11
DE102016119064A1 (de) 2017-04-13
CN108138692A (zh) 2018-06-08
WO2017060449A1 (fr) 2017-04-13

Similar Documents

Publication Publication Date Title
EP1920152B1 (fr) Piston en deux parties pour moteur a combustion interne
DE102007018920B3 (de) Antriebswelle
WO2007068222A1 (fr) Piston en deux pieces pour moteur a combustion interne
WO2008046439A1 (fr) Manchon
EP3597943A1 (fr) Procédé de raccordement des composants ainsi que module
WO2020088878A1 (fr) Unité de liaison servant à relier deux composants à une distance entre eux
WO2017182374A1 (fr) Combinaison comprenant un corps et une bride, et ensemble
EP3359793A1 (fr) Piston pourvu d'un filetage extérieur
AT519652B1 (de) Dichtungsvorrichtung und Hydraulikkolben mit Dichtungsvorrichtung
DE102014002192A1 (de) Maschinenelement
EP1350041B1 (fr) Dispositif de fixation de piston
DE102009025151A1 (de) Befestigungsanordnung und Verfahren zur Befestigung eines Schwungrads oder Schwungradteils an einer Kurbelwelle einer Brennkraftmaschine
DE102016209395A1 (de) Befestigungselement für den Toleranzausgleich
WO2016087228A1 (fr) Dispositif de contraction d'un premier élément structural et d'un second élément structural
DE102011086005A1 (de) Kraftstoffinjektor, Verfahren zur Montage eines Kraftstoffinjektors sowie Spanneinrichtung zur Montage eines Kraftstoffinjektors
DE102012112362B3 (de) Ventil mit einer Befestigungseinrichtung
DE20116901U1 (de) Fügeverbindung für Metallelemente und Paßschrauben für eine solche Fügeverbindung
DE102008038628B4 (de) Konteranordnung
DE10306115B4 (de) Kolben für eine Brennkraftmaschine
EP2011986A2 (fr) Piston à canal de refroidissement en une pièce doté de deux éléments de piston vissés ensemble
DE102016206470B3 (de) Kombination, umfassend ein Gehäuse und einen Flansch, und Anordnung
EP3452712B1 (fr) Piston
DE102018127682B4 (de) Anordnung mit einer Justagevorrichtung zur Lageeinstellung zweier miteinander verbundener Bauteile
DE29710312U1 (de) Nivellierelement
DE102017200411A1 (de) Befestigungsanordnung zur Befestigung mindestens eines Bauteils auf einer Welle

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180326

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20200708

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20240312