DE809768C - Method of making connections for the tubes of a frame - Google Patents
Method of making connections for the tubes of a frameInfo
- Publication number
- DE809768C DE809768C DEP12010A DEP0012010A DE809768C DE 809768 C DE809768 C DE 809768C DE P12010 A DEP12010 A DE P12010A DE P0012010 A DEP0012010 A DE P0012010A DE 809768 C DE809768 C DE 809768C
- Authority
- DE
- Germany
- Prior art keywords
- frame
- tubes
- pipes
- making connections
- light metal
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K19/00—Cycle frames
- B62K19/18—Joints between frame members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Description
Die Erfindung bezieht@'sich auf ein Verfahren, nach dem die Rohre eines Rahmens jeglicher Art, vorzugsweise für Fahrräder,__ Motorfahrräder oder Motorräder, verbunden werden können. ..The invention relates to a method by which the pipes a frame of any kind, preferably for bicycles, __ motorcycles or motorcycles, can be connected. ..
Eine der wichtigsten Forderungen beim Aufbau von beweglichen Rohrrahmen besteht darin, das. Gewicht derselben möglichst niedrig zu halten. Erfüllt kann diese Bedingung dadurch werden, daß, als Werkstoff derartiger Rahmen Leichtmetall be-, nutzt wird. So werden bekanntlich Rohre aus Durallegierungen_hergestellt.One of the most important requirements in the construction of movable tubular frames consists in keeping the weight of the same as low as possible. Can be fulfilled this condition is that, as a material of such a frame light metal is used. As is well known, pipes are made from dural alloys.
Es hat sich jedoch gezeigt, daß die Dauerstandfestigkeit einer solchen Rahmenbauart vielfach nicht ausgereicht hat. Schwierigkeiten ergaben sich insbesondere bei der Hersrtellung der Verbindungen der einzelnen Rohre des Rahmens, da einwandfreie Verfahren zum Löten von Leichtmetall noch nicht bekannt sind. Auch das Schweißen von Leichtmetallrohren ist nicht bei allen Querschnitten ohne weiteres leicht und sicher durchzuführen.However, it has been shown that the creep strength of such Frame design has often not been enough. Difficulties arose in particular in the manufacture of the connections between the individual tubes of the frame, since they are flawless Process for soldering light metal are not yet known. Welding too of light metal tubes is not easily and easily with all cross-sections safe to perform.
Bisher wurden daher aus Stahl hergestellte Rahmen bevorzugt. Die Festigkeit der Stahlrohre bewegt sich beispielsweise für Zweiradfahrzeuge zwischen 50 und 6okg/mmf. Zur Verbindung dienen kanntlich Muffen, die durch Hartlöten oder Schweißung mit den Rohren verbunden werden. Die Vorarbeiten und Vorbereitungen für das Aufbringen der Verbindungsteile und das Verfahren für die Herstellung der Muffenverbindung erfordern bekanntlich unerwünscht viel Zeit und einen erheblichen Arbeitsaufwand. Die Muffen müssen ferner möglichst genau passend angefertigt werden und die Verbindungsstücke, sofern ein direktes Schweißen in Frage kommt, entsprechend zugerichtet sein.So far, frames made of steel have therefore been preferred. The strength of the steel pipes for two-wheeled vehicles, for example, is between 50 and 6okg / mmf. Sockets, which are connected to the pipes by brazing or welding, are known to be used for the connection. The preparatory work and preparations for the application of the connecting parts and the method for producing the socket connection are known to require an undesirably long time and a considerable amount of work. The sleeves must also be made to fit as precisely as possible and the connecting pieces, if direct welding is possible, prepared accordingly.
Uni diese Schwierigkeiten zu beheben, werden aus Stahl hergestellte Rohre eines Rahmens erfindungsgemäß mit Leichtmetallmuffen verbunden, die durch Pressen unmittelbar am Rahmen hergestellt werden. Bei einer solchen Bauweise können Rohre mit einer Festigkeit von ioo bis zu i5o kg!mmp Anwendung finden, indem eine Stahllegierung benutzt wird, der in an sich bekannter Weise Härtebildner zugesetzt werden. To solve these difficulties, pipes of a frame made of steel are connected according to the invention with light metal sleeves which are made by pressing directly on the frame. In such a construction, pipes with a strength of 100 to 150 kg / mmp can be used by using a steel alloy to which hardeners are added in a manner known per se.
Die Abbildungen stellen ein Ausführungsbeispiel für die Durchführung des erfindungsgemäßen Verfahrens dar.The figures show an exemplary embodiment for the implementation of the method according to the invention.
Die Abb. i läßt die Verbindung zweier zusammenstoßender Rohre erkennen; die Abb. 2 zeigt den Rahmen eines Fahrrades in Ansicht; die Abb. 3 ist ein Querschnitt in Richtung e-f. Die Rohre a eines Rahmens sind an ihren Enden, mit denen sie aneinanderstoßen, mit Sicken, Rändelungen, Prägungen o. dgl. Eindrückungen b versehen. In den öffnungen an ihren Enden sind die Rohre a mittels Blechkapseln c abgeschlossen.Fig. I shows the connection of two colliding pipes; Fig. 2 shows the frame of a bicycle in view; Fig. 3 is a cross-section in the direction of e-f. The tubes a of a frame are at their ends, with which they abut, provided with beads, knurling, embossing or similar impressions b. In the openings At their ends, the tubes a are closed by means of sheet metal capsules c.
Die erfindungsgemäße Bauweise erbringt eine wesentliche Verkürzung hinsichtlich der Herstellungszeit von Rahmenverbindungen. Das bei . der Anwendung von Hartlot- und Schweißverfahren eintretende Verziehen des Rahmens fällt bei der Anwendung des erfindungsgemäßen Verfahrens fort, so daß sich das bisher immer wieder erforderliche zeitraubende Nachrichten erübrigt.The construction according to the invention results in a substantial shortening with regard to the production time of frame connections. That at. the application The frame warps caused by brazing and welding processes Application of the method according to the invention continues, so that this has happened again and again so far No need for time-consuming messages.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP12010A DE809768C (en) | 1948-10-02 | 1948-10-02 | Method of making connections for the tubes of a frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP12010A DE809768C (en) | 1948-10-02 | 1948-10-02 | Method of making connections for the tubes of a frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE809768C true DE809768C (en) | 1951-08-02 |
Family
ID=7363811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP12010A Expired DE809768C (en) | 1948-10-02 | 1948-10-02 | Method of making connections for the tubes of a frame |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE809768C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0079575A1 (en) * | 1981-11-12 | 1983-05-25 | Detmar Grünfeld | Joints for connecting tubular parts of a bicycle, such as the forks, as well as their process of manufacture |
| FR2702730A1 (en) * | 1993-03-16 | 1994-09-23 | Martin Pierre Abel | Cycle frame |
-
1948
- 1948-10-02 DE DEP12010A patent/DE809768C/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0079575A1 (en) * | 1981-11-12 | 1983-05-25 | Detmar Grünfeld | Joints for connecting tubular parts of a bicycle, such as the forks, as well as their process of manufacture |
| WO1983001763A1 (en) * | 1981-11-12 | 1983-05-26 | Grünfeld, Detmar | Connections between portions of a bicycle frame or fork, comprised of tubes, and method for making the same |
| US4541649A (en) * | 1981-11-12 | 1985-09-17 | Gruenfeld Detmar | Connections for tubular bicycle frame and fork components and method of making the same |
| FR2702730A1 (en) * | 1993-03-16 | 1994-09-23 | Martin Pierre Abel | Cycle frame |
| US5445400A (en) * | 1993-03-16 | 1995-08-29 | Martin; Pierre A. | Cycle frame |
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