DE676832C - Spring hammer driven by a crank - Google Patents

Spring hammer driven by a crank

Info

Publication number
DE676832C
DE676832C DES117793D DES0117793D DE676832C DE 676832 C DE676832 C DE 676832C DE S117793 D DES117793 D DE S117793D DE S0117793 D DES0117793 D DE S0117793D DE 676832 C DE676832 C DE 676832C
Authority
DE
Germany
Prior art keywords
spring
crank
hammer driven
spring hammer
percussion piston
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
DES117793D
Other languages
German (de)
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens 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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Priority to DES117793D priority Critical patent/DE676832C/en
Application granted granted Critical
Publication of DE676832C publication Critical patent/DE676832C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D11/00Portable percussive tools with electromotor or other motor drive
    • B25D11/06Means for driving the impulse member
    • B25D11/12Means for driving the impulse member comprising a crank mechanism

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)

Description

Federhammer mit (Antrieb durch eine Kurbel Bei den ortsbeweglichen Federhämmern kommt es darauf an, das Gewicht und die Baulänge möglichst gering zu halten, um die Handhabung zu erleichtern. Man hat zu diesem Zwecke bereits vorgeschlagen, die an dem Schlagkolben befestigte Feder unmittelbar an der Antriebskurbel angreifen zu lassen. Um hierbei zu verhindern, daß die Feder unter dem Einüuß der Fliehkräfte zu weit nach außen schwingt, hat man die Feder auf einer Geradführungsstange, die an der Kurbel befestigt ist, gelagert.Spring hammer with (driven by a crank With spring hammers it is important to keep the weight and the overall length as low as possible hold to make handling easier. For this purpose it has already been suggested that attack the spring attached to the percussion piston directly on the drive crank allow. In order to prevent the spring from being influenced by centrifugal forces swings too far outwards, you have the spring on a straight guide rod that is attached to the crank, stored.

Die Erfindung besteht demgegenüber darin, daß bei einem solchen Federhammer, bei dem der Schlagkolben mit der Antriebskurbel durch eine Feder unmittelbar verbunden ist, an den das Federende mit der Kurbel verbindenden Elementen auf der der Feder entgegengesetztenSeite eineAusgleichsmasse angebracht ist.The invention consists in the fact that with such a spring hammer, in which the percussion piston is directly connected to the drive crank by a spring is, on the elements connecting the spring end to the crank on that of the spring a leveling compound is attached on the opposite side.

Durch die Gegenwirkung dieser Ausgleichsmasse wird die Feder daran gehindert,, unter dem Einfluß der Fliehkräfte nach außen zu schwingen und gegebenenfalls sogar an das Gehäuse anzuschlagen. Weiter ergibt sich hierbei der Vorteil, daß eine Geradführungsstange erspart werden kann und somit die den Schlagkolben mit der Kurbel verbindende Feder nicht an der Geradführungsstange schleift, was eine verhältnismäßig rasche Abnutzung der Feder zur Folge hat, da, wie neuere Untersuchungen gezeigt haben, bei Federn die Oberflächenbeschaffenheit für die Dauerfestigkeit der Feder maßgebend ist, insbesondere bei solchen Federn, die eine z. B. durch eine Nitrierschicht vergütete Oberfläche haben. Mit dem Schlagkolben kann dabei die Feder zweckmäßig in an sich bekannter Weise durch Gelenke oder mittels elastischer Elemente, wie Federscheiben, GLunmi, Leder o. dgl., verbunden sein, wodurch ein gewisses seitliches Winkelspiel des ,an dem Kolben befestigten Federendes ermöglicht wird. Diese Verbindung der Feder mit dem Schlagkolben bildet aber keinen Teil der Erfindung.Through the counteraction of this balancing mass, the spring is attached to it prevented, under the influence of centrifugal forces to swing outwards and possibly even to hit the housing. Next there is the advantage that a Straight guide rod can be saved and thus the percussion piston with the crank connecting spring does not drag on the straight guide rod, which is a relatively As recent studies have shown, this results in rapid wear of the spring have, in the case of springs, the surface properties for the fatigue strength of the spring is decisive, especially with those springs that have a z. B. by a nitrided layer have tempered surface. With the percussion piston, the spring can be useful in a manner known per se by joints or by means of elastic elements, such as Spring washers, GLunmi, leather o. The like. Be connected, creating a certain lateral Angular play of the spring end attached to the piston is made possible. This connection but the spring with the percussion piston does not form part of the invention.

In der Zeichnung ist schematisch ein Ausführungsbeispiel der Erfindung dargestellt. Die Kurbel r wird in üblicher Weise vDn einem am Federhammer vorgesehenen Elektromotor oder über eine biegsame Welle angetrieben. Auf dem Kurbelzapfen q. ist eine als Verbindungselement dienende Buchse 3 drehbar gelagert, an deren einer Seite die Feder 2 befestigt, während das andere Ende 6 der Feder mit dem Schlagkolben 5 verbunden ist. An der Buchse 3 ist nun auf der der Feder 2 entgegengesetzten Seite eine Ausgleichsmasse 7 angebracht, die infolge der Wirkung der Fliehkraft verhindert, daß die Feder 2, insbesondere deren oberes Ende, nach außen schwingt.An exemplary embodiment of the invention is shown schematically in the drawing shown. The crank r is provided in the usual way by one on the spring hammer Electric motor or driven by a flexible shaft. On the crank pin q. is a serving as a connecting element socket 3 rotatably mounted, on one of which Side fastened the spring 2, while the other end 6 of the spring with the percussion piston 5 is connected. On the socket 3 is now on the opposite side of the spring 2 a balancing mass 7 is attached, which prevents due to the effect of centrifugal force, that the spring 2, in particular its upper end, swings outward.

Claims (1)

PATENTANSPRUCH Federhammer mit Antrieb durch eine Kurbel, bei dem die zur Kraftübertragung zwischen Schlagkolben und Kurbel dienende Feder an der Kurbel angreift, dadurch gekennzeichnet, daß an den das Federende mit der Kurbel verbindenden Elementen auf der der Feder entgegengesetzten Seite eine Ausgleichsmasse angebracht ist.PATENT CLAIM Spring hammer driven by a crank, in which the spring used to transmit power between the percussion piston and crank on the Crank engages, characterized in that the spring end with the crank connecting elements on the side opposite the spring a balancing mass is appropriate.
DES117793D 1935-04-03 1935-04-03 Spring hammer driven by a crank Expired DE676832C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES117793D DE676832C (en) 1935-04-03 1935-04-03 Spring hammer driven by a crank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES117793D DE676832C (en) 1935-04-03 1935-04-03 Spring hammer driven by a crank

Publications (1)

Publication Number Publication Date
DE676832C true DE676832C (en) 1939-06-12

Family

ID=7534343

Family Applications (1)

Application Number Title Priority Date Filing Date
DES117793D Expired DE676832C (en) 1935-04-03 1935-04-03 Spring hammer driven by a crank

Country Status (1)

Country Link
DE (1) DE676832C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10348514B3 (en) * 2003-10-18 2005-02-17 Hilti Ag Hand-held machine tool for hammer drilling has connecting rod with first part connected to cam and second part connected to piston

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10348514B3 (en) * 2003-10-18 2005-02-17 Hilti Ag Hand-held machine tool for hammer drilling has connecting rod with first part connected to cam and second part connected to piston

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