DE923900C - Piston ring-less, free-flying working piston for internal combustion tools - Google Patents

Piston ring-less, free-flying working piston for internal combustion tools

Info

Publication number
DE923900C
DE923900C DEK1020D DEK0001020D DE923900C DE 923900 C DE923900 C DE 923900C DE K1020 D DEK1020 D DE K1020D DE K0001020 D DEK0001020 D DE K0001020D DE 923900 C DE923900 C DE 923900C
Authority
DE
Germany
Prior art keywords
piston
stroke
internal combustion
working piston
free
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.)
Expired
Application number
DEK1020D
Other languages
German (de)
Inventor
Ernst Ueckert
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.)
Knorr Bremse AG
Original Assignee
Knorr Bremse AG
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 Knorr Bremse AG filed Critical Knorr Bremse AG
Priority to DEK1020D priority Critical patent/DE923900C/en
Application granted granted Critical
Publication of DE923900C publication Critical patent/DE923900C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D9/00Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06Means for driving the impulse member
    • B25D9/10Means for driving the impulse member comprising a built-in internal-combustion engine

Description

Die Erfindung bezieht sich auf die Ausbildung eins kolbenri.nglosen, frei fiie-genden:Arbeitskolben:s für Brennkraftwerkzeuge, der seinen Schlaghub unter -der Einwirkung von. Brennkraft, rseinen Rückhub unter der Einwirkung von Druckluft :ausführt.The invention relates to the formation of a piston ring-less, freely fiie-genden: Working piston: s for internal combustion tools, which has its stroke stroke under the action of. Combustion power, its return stroke under the action of compressed air: executes.

Um ein Festfahren dieses Arbeitskolbens -im 'Zylinder infolge -der Wärmeausdehnung im Betrieb zu verhindern, mußte das. Spiel zwischen Kolben und Zylinder größer gehalten werden, als zur Vermeidung von Gasverlusten und zur Erzielung eines guten Wirkungsgrades erwünscht ist.In order to get this working piston stuck in the cylinder as a result of the To prevent thermal expansion during operation, that had to be. Clearance between piston and cylinder be kept larger than to avoid gas losses and to achieve a good efficiency is desired.

Um diesem Mangel abzuhelfen, wird erfindungsgemäß vorgeschlagen, zum Ansaugen von Kühlluft in den beim Schlaghub sich bildenden Ringraum zwischen dem Zylinder und ,dem Kolbenteil mit dem kleineren Durchmesser des in an sich bekannter Weise als Stufenkolben ausgebildeten Arbeitskolbens mehrere Bohrungen im Zylinder vorzusehen.In order to remedy this deficiency, it is proposed according to the invention to Sucking in cooling air into the annular space that forms during the stroke stroke between the Cylinder and, the piston part with the smaller diameter of the known per se Way designed as a stepped piston working piston several bores in the cylinder to be provided.

Damit .ist es möglich, das Spiel zwischen Kolben und Zylinder erheblich herabzusetzen und infolge Verringerung von Gasverlusten den Wirkungsgrad der Maschine zu verbessern.This makes it possible to considerably reduce the clearance between the piston and cylinder and reduce the efficiency of the machine as a result of reducing gas losses to improve.

Der Zweck der bekannten Ausführungen mit zweistufigem und mit Kolbenringen versehenem Arbeitskolben dagegen besteht darin, die Verbrennungsgase selbst zur Rückführung des Arbeitskolbens, auszunutzenun d,dabei .durchBearafschlagung einer großen Kolbenfläche im Verbrennungsraum eine hinreichende Verdichtung zu erzielen.The purpose of the known designs with two-stage and with piston rings equipped working piston, however, consists in the combustion gases themselves to Return of the working piston, to be used, thereby .by applying a large piston area in the combustion chamber to achieve sufficient compression.

In der Zeichnung isst in Fig. i der für das Verständnis der Erfindung erforderliche Teil des Zylinders mit in Ruhelage befindlichem Arbeitskolben und in Fiig. 2 eine weitere Ges.taltungsnlöglichkeit dieses Arbeitskolbens dargestellt. Der Arbeitskolben i besitzt an seinem Schlagende einen Bund 2. Der Kolben wird im oberen Teildes Zylinders 3 .in einer Büchse q. geführt. Die Bohrung 5 dient zum Ableiten der Abgase. Über die Bohrung 6 wird beim Schlaghub des Kolbens r Kühlluft angesengt. Durch den Kanal 7 wird Druckluft unter den Kolben, i geleitet, die ihn nach vollendetem Schlaghub wieder nach oben treibt.In the drawing, FIG. 1 eats the for an understanding of the invention required part of the cylinder with the working piston in rest position and in fig. 2 shows another design option for this working piston. The working piston i has a collar 2 at its striking end. The piston is in the upper part of the cylinder 3. in a sleeve q. guided. The hole 5 is used for Discharge of the exhaust gases. Cooling air is supplied through the bore 6 during the stroke of the piston r singed. Through the channel 7 compressed air is passed under the piston, i, which him drives up again after the stroke has been completed.

Die Kühlung wird auch auf den oberen, engeren Zylinderteil ausgedehnt, wenn man den oberen Kolbenteil i' spulenartig eindreht, wie das in. Fi.g. 2 der Zeichnung dargestellt ist.The cooling is also extended to the upper, narrower part of the cylinder, if the upper piston part i 'is screwed in like a coil, as shown in FIG. 2 of the Drawing is shown.

Claims (2)

PATENTANSPRÜCHE: i. Kolbenringloser, frei fliegender Arbeitskolben für Brennkraftwerkzeuge, der seinen Schlaghub unter der Einwirkung von Brennkraft, seinen Rückhub unter der Einwirkung von Druckluft ausführt, ;dadurch gekennzeichnet, daß zum Ansaugen von Kübllaft in den beim Schlaghub sich bildenden Ringraum zwischen dem Zylinder (3) und -dem Kolbenteil (i b:zw. i') mit dem kleineren Durchmesser des in an sich bekannter Weise als Stufenkolben ausgebilideten Arbeitskolbens mehrere Bohrungen (6) im Zylinder (3) vorgesehen sind. PATENT CLAIMS: i. Free-floating working piston without piston rings for internal combustion tools that have their stroke stroke under the influence of internal combustion performs its return stroke under the action of compressed air; characterized in that, that for the suction of Kübllaft into the annular space formed during the stroke stroke between the cylinder (3) and the piston part (i b: between i ') with the smaller diameter of the working piston designed as a stepped piston in a manner known per se Bores (6) are provided in the cylinder (3). 2. Arbeitskolben nach Ansprudh i, dadurch gekennzeichnet, @daß zur Ausdehnung der Luftkühlung auf den oberen Zylinderteil der in ddesem Raum sich bewegende Kolbenteil (i') spulenartng eingedreht ist.2. Working piston according to Sprudh i, characterized in that @ that to expand the air cooling on the upper cylinder part the piston part (i ') moving in the space is screwed in like a coil.
DEK1020D 1943-07-09 1943-07-09 Piston ring-less, free-flying working piston for internal combustion tools Expired DE923900C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK1020D DE923900C (en) 1943-07-09 1943-07-09 Piston ring-less, free-flying working piston for internal combustion tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK1020D DE923900C (en) 1943-07-09 1943-07-09 Piston ring-less, free-flying working piston for internal combustion tools

Publications (1)

Publication Number Publication Date
DE923900C true DE923900C (en) 1955-02-21

Family

ID=7208712

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK1020D Expired DE923900C (en) 1943-07-09 1943-07-09 Piston ring-less, free-flying working piston for internal combustion tools

Country Status (1)

Country Link
DE (1) DE923900C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023428B (en) * 1956-05-19 1958-01-23 Knorr Bremse Gmbh Internal combustion hammer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023428B (en) * 1956-05-19 1958-01-23 Knorr Bremse Gmbh Internal combustion hammer

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