EP1036634A2 - Device for mounting pistons with outwardly clamping piston rings in a cylinder - Google Patents

Device for mounting pistons with outwardly clamping piston rings in a cylinder Download PDF

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Publication number
EP1036634A2
EP1036634A2 EP00103215A EP00103215A EP1036634A2 EP 1036634 A2 EP1036634 A2 EP 1036634A2 EP 00103215 A EP00103215 A EP 00103215A EP 00103215 A EP00103215 A EP 00103215A EP 1036634 A2 EP1036634 A2 EP 1036634A2
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EP
European Patent Office
Prior art keywords
piston
piston rings
shells
segments
rings
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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Withdrawn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
EP00103215A
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German (de)
French (fr)
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EP1036634A3 (en
Inventor
Hans-Joachim Risch
Hans-Rainer Dipl.-Phys. Briller
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Federal Mogul Burscheid GmbH
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Federal Mogul Burscheid GmbH
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Application filed by Federal Mogul Burscheid GmbH filed Critical Federal Mogul Burscheid GmbH
Publication of EP1036634A2 publication Critical patent/EP1036634A2/en
Publication of EP1036634A3 publication Critical patent/EP1036634A3/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/12—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same mounting or demounting piston rings

Definitions

  • the invention relates to a device for mounting pistons with radially outward exciting piston rings in cylinders, especially internal combustion engines, by means of one encompassing the piston rings and consisting of at least two segments Clamping body.
  • Mounting bushes are known which are designed as tubular bodies, the inner surface being slightly conical.
  • Such an assembly bushing can be found in DE 21 55 998.
  • the mounting bush is placed on the engine block and the piston is pushed through the bush together with the piston rings. In this way, both axial and radial forces act on the piston rings.
  • the piston rings are damaged if the rings are located eccentrically in the piston ring groove and have a small wall thickness. With such a constellation, the rings are bent or even break when pressed through the assembly bushing.
  • devices are known which consist of ring halves connected to one another and are designed as a tensioning band.
  • German utility model 1728 262 discloses a tensioning band which is placed around the piston and is firmly attached to the piston by means of a locking device. To install the piston in the cylinder bore, the lock must first be released so that the piston can be pressed through the tension band. This design is not suitable for automated large series applications.
  • the invention has for its object to securely fix piston rings with large ring spread and low axial height in the annular groove of a piston, so that the piston can be inserted into the corresponding cylinder bore together with the rings by means of an automatic machine.
  • This object is achieved by the features of claim 1.
  • Advantageous embodiments of the invention are documented in the subclaims.
  • the clamping body according to the invention is designed so that it fixes the piston rings in the piston only by radial spring force. It is sufficient that the spring force is only slightly greater than the tangential force of the piston rings, ie the force of the piston rings which is outwardly exciting. In this way, the piston rings are clamped together to a block, ie without a backlash.
  • the device serves not only as an assembly device but also as a transport device for the piston-piston ring system. In contrast to the previous procedure, the pistons equipped with piston rings can be transported with tensioned piston rings to the assembly line of the engine manufacturer.
  • tensioning body Since the tensioning body is only held on the piston by spring force, it is possible to place the complete system of tensioning body, piston and piston rings from an automatic machine on the engine block of the internal combustion engine and to press it through the tensioning body into the cylinder bore without pressure that the clamping body must be released.
  • the clamping body 1 shown in Figure 1 consists of two half-shells 2, 2 '.
  • the half-shells 2, 2 'each have a flange 4, 5, in which screws 3 extend.
  • the flange 4 has a thread 6 and the flange 5 has a bore 7 with a diameter which is selected so that the screw 3 can be carried out with play.
  • a spring 8 is provided, which exerts a compressive force on the half-shell 2 'when the screw 3 is tightened, so that the half-shells 2, 2' bear under spring force on the piston to be assembled.
  • the spring force is set so that the tangential force of the piston rings to be fixed is exceeded.
  • FIG. 2 shows a piston 9 with an attached clamping body 1.
  • the piston 9 has a total of 3 piston rings 10, 10 ', 10' ', which are centered in by means of the half-shells 2, 2' the grooves are fixed.
  • the piston is inserted into the cylinder bore 11 with its shaft used and that until the lower edge 12 of the half shells on the engine block 13th lies on.
  • the piston crown 14 By pressing on the piston crown 14, the piston 9 is in the Cylinder bore 11 pressed without the half-shells 2, 2 'having to be loosened.
  • the clamping body 1 or the half-shells 2, 2 ' can be recycled to the Suppliers are sent back using this device as a transport device can use.
  • the pistons equipped with piston rings can be fitted with the clamping body be transported to the engine manufacturer. This unit can then be of an automatic assembly machine can be transported and installed safely.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Actuator (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung zur Montage von Kolben (9) mit radial nach außen spannenden Kolbenringen (10,10',10'') in Zylindern.
Mittels eines die Kolben (9) umspannenden Spannkörpers werden die Kolbenringe (10,10',10'') im Kolben zentrisch gehalten. Der Spannkörper (1) weist Segmente auf, die unter Federkraft an den Kolbenringen (10,10',10'') anliegen. Die Spannkraft ist so bemessen, daß die Tangentialkraft der Kolbenringe überschritten wird.

Figure 00000001
The invention relates to a device for assembling pistons (9) with piston rings (10, 10 ', 10'') which radially extend outwards in cylinders.
The piston rings (10, 10 ', 10'') are held centrally in the piston by means of a clamping body spanning the pistons (9). The clamping body (1) has segments which bear against the piston rings (10, 10 ', 10'') under spring force. The clamping force is dimensioned so that the tangential force of the piston rings is exceeded.
Figure 00000001

Description

Die Erfindung betrifft eine Vorrichtung zur Montage von Kolben mit radial nach außen spannenden Kolbenringen in Zylindern, insbesondere von Brennkraftmaschinen, mittels eines die Kolbenringe umgreifenden, aus mindestens zwei Segmenten bestehenden Spannkörpers.The invention relates to a device for mounting pistons with radially outward exciting piston rings in cylinders, especially internal combustion engines, by means of one encompassing the piston rings and consisting of at least two segments Clamping body.

Aus dem Stand der Technik sind verschiedene Vorrichtungen zum Einführen von mit Kolbenringen bestückten Kolben zu entnehmen.
Es sind Montagebuchsen bekannt, die als Rohrkörper ausgebildet sind, wobei die Innenfläche leicht konisch verläuft.
Aus der DE 21 55 998 ist eine solche Montagebuchse zu entnehmen. Zur Benutzung wird die Montagebuchse auf den Motorblock aufgesetzt und der Kolben zusammen mit den Kolbenringen durch die Buchse gedrückt. Auf diese Weise wirken auf die Kolbenringe sowohl axiale als auch radiale Kräfte. Eine Beschädigung der Kolbenringe ist dann gegeben, wenn die Ringe exzentrisch in der Kolbenringnut liegen und eine geringe Wandstärke aufweisen. Bei einer solchen Konstellation werden die Ringe beim Durchdrücken durch die Montagebuchse verbogen oder können sogar brechen. Neben den Montagebuchsen sind Vorrichtungen bekannt, die aus miteinander verbundenen Ringhälften bestehen und als Spannband ausgebildet sind. Derartige Vorrichtungen werden im Bereich der Kolbenringe um den Kolben gespannt. Die Kolbenringe werden so in der Nut des Kolbens zentriert gehalten. Das deutsche Gebrauchsmuster 1728 262 offenbart ein Spannband, das um den Kolben gelegt wird und mittels einer Verschlußvorrichtung fest am Kolben befestigt wird.
Zum Einbau des Kolbens in die Zylinderbohrung muß der Verschluß erst wieder gelöst werden, damit der Kolben durch das Spannband gedrückt werden kann. Diese Konstruktion ist nicht für eine automatisierte Großserienanwendung geeignet. Various devices for introducing pistons fitted with piston rings can be found in the prior art.
Mounting bushes are known which are designed as tubular bodies, the inner surface being slightly conical.
Such an assembly bushing can be found in DE 21 55 998. For use, the mounting bush is placed on the engine block and the piston is pushed through the bush together with the piston rings. In this way, both axial and radial forces act on the piston rings. The piston rings are damaged if the rings are located eccentrically in the piston ring groove and have a small wall thickness. With such a constellation, the rings are bent or even break when pressed through the assembly bushing. In addition to the mounting bushes, devices are known which consist of ring halves connected to one another and are designed as a tensioning band. Such devices are clamped around the piston in the area of the piston rings. The piston rings are kept centered in the groove of the piston. German utility model 1728 262 discloses a tensioning band which is placed around the piston and is firmly attached to the piston by means of a locking device.
To install the piston in the cylinder bore, the lock must first be released so that the piston can be pressed through the tension band. This design is not suitable for automated large series applications.

Der Erfindung liegt die Aufgabe zugrunde, Kolbenringe mit großer Ringspreizung und geringer axialer Höhe sicher in der Ringnut eines Kolbens zu fixieren, so daß der Kolben zusammen mit den Ringen mittels eines Automaten in die korrespondierende Zylinderbohrung einsetzbar ist.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen dokumentiert.The invention has for its object to securely fix piston rings with large ring spread and low axial height in the annular groove of a piston, so that the piston can be inserted into the corresponding cylinder bore together with the rings by means of an automatic machine.
This object is achieved by the features of claim 1. Advantageous embodiments of the invention are documented in the subclaims.

Der erfindungsgemäße Spannkörper ist so ausgelegt, daß er lediglich durch radiale Federkraft die Kolbenringe im Kolben fixiert. Es reicht aus, daß die Federkraft nur geringfügig größer ist als die Tangentialkraft der Kolbenringe, d.h. die nach außen spannende Kraft der Kolbenringe.
Auf diese Weise werden die Kolbenringe bis auf Block, d.h. ohne Stoßspiel zusammengespannt.
Die Vorrichtung dient nicht nur als Montagevorrichtung sondern auch als Transportvorrichtung des Systems Kolben - Kolbenring. Im Gegensatz zur bisherigen Verfahrensweise können die mit Kolbenringen bestückten Kolben auf diese Weise mit gespannten Kolbenringen bis zur Montagestraße des Motorenherstellers transportiert werden.
Da der Spannkörper lediglich durch Federkraft am Kolben gehalten ist, ist es möglich, das komplette System Spannkörper, Kolben und Kolbenringe von einem Automaten auf den Motorblock der Verbrennungskraftmaschine aufzusetzen und durch Druck auf den Kolben diesen durch die Spannkörper hindurch in die Zylinderbohrung zu pressen, ohne das der Spannkörper gelöst werden muß.The clamping body according to the invention is designed so that it fixes the piston rings in the piston only by radial spring force. It is sufficient that the spring force is only slightly greater than the tangential force of the piston rings, ie the force of the piston rings which is outwardly exciting.
In this way, the piston rings are clamped together to a block, ie without a backlash.
The device serves not only as an assembly device but also as a transport device for the piston-piston ring system. In contrast to the previous procedure, the pistons equipped with piston rings can be transported with tensioned piston rings to the assembly line of the engine manufacturer.
Since the tensioning body is only held on the piston by spring force, it is possible to place the complete system of tensioning body, piston and piston rings from an automatic machine on the engine block of the internal combustion engine and to press it through the tensioning body into the cylinder bore without pressure that the clamping body must be released.

Die Erfindung ist anhand eines Ausführungsbeispiels in einer Prinzipskizze dargestellt. Es zeigen:

Figur 1
eine erfindungsgemäße Vorrichtung in der Draufsicht
Figur 2
Vorrichtung gemäß Figur 1 im montierten Zustand
The invention is illustrated in an outline sketch using an exemplary embodiment. Show it:
Figure 1
a device according to the invention in plan view
Figure 2
Device according to Figure 1 in the assembled state

Der in der Figur 1 dargestellte Spannkörper 1 besteht aus zwei Halbschalen 2, 2'. Die Halbschalen 2, 2' weisen je einen Flansch 4, 5 auf, in den sich Schrauben 3 erstrecken. Der Flansch 4 weist ein Gewinde 6 auf und der Flansch 5 eine Bohrung 7 mit einem Durchmesser, der so gewählt ist, daß sich die Schraube 3 mit Spiel durchführen läßt. Zwischen Schraube 3 und Flansch 5 ist eine Feder 8 vorgesehen, die beim Anziehen der Schraube 3 eine Druckkraft auf die Halbschale 2' ausübt, so daß die Halbschalen 2, 2' unter Federkraft an dem zu montierendem Kolben anliegen.
Die Federkraft wird dabei so eingestellt, das die Tangentialkraft der zu fixierenden Kolbenringe überschritten wird.The clamping body 1 shown in Figure 1 consists of two half-shells 2, 2 '. The half-shells 2, 2 'each have a flange 4, 5, in which screws 3 extend. The flange 4 has a thread 6 and the flange 5 has a bore 7 with a diameter which is selected so that the screw 3 can be carried out with play. Between screw 3 and flange 5, a spring 8 is provided, which exerts a compressive force on the half-shell 2 'when the screw 3 is tightened, so that the half-shells 2, 2' bear under spring force on the piston to be assembled.
The spring force is set so that the tangential force of the piston rings to be fixed is exceeded.

Die Figur 2 zeigt einen Kolben 9 mit aufgesetztem Spannkörper 1. Der Kolben 9 weist insgesamt 3 Kolbenringe 10, 10', 10'' auf, die mittels der Halbschalen 2, 2' zentriert in den Nuten festgelegt sind. Der Kolben wird mit seinem Schaft in die Zylinderbohrung 11 eingesetzt und zwar bis die Unterflanke 12 der Halbschalen auf dem Motorblock 13 aufliegt. Durch Druck auf den Kolbenboden 14 wird der Kolben 9 in die Zylinderbohrung 11 gepresst, ohne das die Halbschalen 2, 2' gelöst werden müssen. Der Spannkörper 1 bzw. die Halbschalen 2, 2' können zur Wiederverwertung an den Lieferanten zurückgeschickt werden, der diese Vorrichtung als Transportvorrichtung verwenden kann. Die mit Kolbenringen bestückten Kolben können mit dem Spannkörper zum Motorenhersteller transportiert werden. Diese Baueinheit läßt sich dann mittels eines Montageautomaten sicher transportieren und montieren.FIG. 2 shows a piston 9 with an attached clamping body 1. The piston 9 has a total of 3 piston rings 10, 10 ', 10' ', which are centered in by means of the half-shells 2, 2' the grooves are fixed. The piston is inserted into the cylinder bore 11 with its shaft used and that until the lower edge 12 of the half shells on the engine block 13th lies on. By pressing on the piston crown 14, the piston 9 is in the Cylinder bore 11 pressed without the half-shells 2, 2 'having to be loosened. The clamping body 1 or the half-shells 2, 2 'can be recycled to the Suppliers are sent back using this device as a transport device can use. The pistons equipped with piston rings can be fitted with the clamping body be transported to the engine manufacturer. This unit can then be of an automatic assembly machine can be transported and installed safely.

Claims (6)

Vorrichtung zur Montage von Kolben mit radial nach außen spannenden Kolbenringen in Zylindern, insbesondere von Brennkraftmaschinen, mittels eines die Kolbenringe umgreifenden, aus mindestens zwei Segmenten bestehenden Spannkörpers, dadurch gekennzeichnet, daß der Spannkörper (1) radial nach innen spannend, federnd ausgebildet ist und eine Federkraft aufweist, die größer ist als die Summe der Tangentialkräfte der Kolbenringe (10,10',10'').Device for the assembly of pistons with radially outward clamping Piston rings in cylinders, in particular internal combustion engines, by means of a Piston rings encompassing, consisting of at least two segments Tensioning body, characterized in that the tensioning body (1) radially inwards is exciting, resilient and has a spring force that is greater than that Sum of the tangential forces of the piston rings (10, 10 ', 10' '). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kontur der Innenumfangsfläche der Segmente der Kontur der Außenumfangsfläche des Kolbens (9) angepaßt ist und daß die Segmente mit definierter Federkraft an die Außenumfangsfläche des Kolbens (9) preßbar sind.Apparatus according to claim 1, characterized in that the contour of the Inner peripheral surface of the segments of the contour of the outer peripheral surface of the piston (9) is adapted and that the segments with a defined spring force to the Outer peripheral surface of the piston (9) can be pressed. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Segmente miteinander verbunden sind.Device according to claims 1 and 2, characterized in that the Segments are interconnected. Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der Spannkörper (1) aus zwei Halbschalen (2,2') besteht.Device according to claims 1 to 3, characterized in that the Clamping body (1) consists of two half shells (2,2 '). Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Halbschalen (2,2') mit Flanschen (4,5) zur Aufnahme von Verbindungselementen versehen sind, wobei die Verbindungselemente mit Federn zusammenwirken derart, daß eine federnde Anpressung der Halbschalen (2,2' auf die Kolbenringe (10,10',10'') erzeugt ist.Device according to claim 4, characterized in that the half-shells (2,2 ') are provided with flanges (4,5) for receiving connecting elements, wherein the connecting elements cooperate with springs such that a resilient Pressure of the half-shells (2.2 'on the piston rings (10.10', 10 '') is generated. Vorrichtung nach Anspruch 4 und 5, dadurch gekennzeichnet, daß die Verbindungselemente Schrauben (3) sind, die mit einer Druckfeder (8) zusammenwirken, die die Halbschalen (2,2') relativ radial aufeinander zudrückt.Apparatus according to claim 4 and 5, characterized in that the Connecting elements are screws (3) which are connected to a compression spring (8) cooperate, which presses the half-shells (2,2 ') relatively radially towards one another.
EP00103215A 1999-03-18 2000-02-17 Device for mounting pistons with outwardly clamping piston rings in a cylinder Withdrawn EP1036634A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19912166 1999-03-18
DE1999112166 DE19912166C2 (en) 1999-03-18 1999-03-18 Assembly tool for assembling pistons with radially outward-tensioning piston rings in cylinders

Publications (2)

Publication Number Publication Date
EP1036634A2 true EP1036634A2 (en) 2000-09-20
EP1036634A3 EP1036634A3 (en) 2002-08-21

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EP00103215A Withdrawn EP1036634A3 (en) 1999-03-18 2000-02-17 Device for mounting pistons with outwardly clamping piston rings in a cylinder

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DE (1) DE19912166C2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106736877A (en) * 2016-12-08 2017-05-31 常州中车柴油机零部件有限公司 A kind of Hough set and the processing control method using heavy amount in its gap-clearance of piston rings
CN108481259A (en) * 2018-06-19 2018-09-04 泰州市铧颐特种装备有限公司 A kind of self-adjustable piston pin backing-out punch
CN108747970A (en) * 2018-08-30 2018-11-06 江西五十铃发动机有限公司 A kind of folding piston enters cylinder holes tooling
CN110303454A (en) * 2019-07-20 2019-10-08 单春旺 A quick installation device for automobile piston ring

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003072B4 (en) * 2005-01-22 2007-06-28 Daimlerchrysler Ag Method for installing a piston in a cylinder bore and a piston thereto
US8640314B2 (en) 2010-08-03 2014-02-04 Federal-Mogul Corporation Piston assembly transportation and installation apparatus and methods of transporting and installing a piston assembly therewith

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE201824C (en) *
US1597926A (en) * 1923-01-12 1926-08-31 Henry R Seifert Apparatus for use in forming piston rings
US1500189A (en) * 1923-06-22 1924-07-08 Frederick W Graf Piston-ring compressor
CH134526A (en) * 1928-06-12 1929-07-31 Leutwyler Ad Device for inserting pistons with piston rings into the cylinder.
CH125537A (en) * 1928-06-12 1928-04-16 Ad Leutwyler Device for inserting pistons with piston rings into the cylinder.
DE491446C (en) * 1928-07-17 1930-02-10 Adolf Leutwyler Device for introducing pistons with piston rings into cylinders
DE1728262U (en) * 1954-05-07 1956-08-16 Auto Union Gmbh TENSION STRAP FOR PISTON RINGS.
US3707027A (en) * 1970-11-12 1972-12-26 Sealed Power Corp Loading sleeve for installing a piston and ring assembly into a cylinder bore

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106736877A (en) * 2016-12-08 2017-05-31 常州中车柴油机零部件有限公司 A kind of Hough set and the processing control method using heavy amount in its gap-clearance of piston rings
CN106736877B (en) * 2016-12-08 2019-08-27 常州中车柴油机零部件有限公司 Sink the processing control method of amount in a kind of Hough set and gap-clearance of piston rings using it
CN108481259A (en) * 2018-06-19 2018-09-04 泰州市铧颐特种装备有限公司 A kind of self-adjustable piston pin backing-out punch
CN108747970A (en) * 2018-08-30 2018-11-06 江西五十铃发动机有限公司 A kind of folding piston enters cylinder holes tooling
CN108747970B (en) * 2018-08-30 2023-11-03 江西五十铃发动机有限公司 Tool for opening and closing piston to enter cylinder hole
CN110303454A (en) * 2019-07-20 2019-10-08 单春旺 A quick installation device for automobile piston ring
CN110303454B (en) * 2019-07-20 2021-04-09 胡彩云 A quick installation device for automobile piston ring

Also Published As

Publication number Publication date
DE19912166A1 (en) 2000-09-28
EP1036634A3 (en) 2002-08-21
DE19912166C2 (en) 2001-05-31

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