DE437894C

DE437894C - Lathe for crankshafts with a fixed and a rotatable clamping device

Info

Publication number: DE437894C
Application number: DEB117788D
Authority: DE
Original assignee: Bergische Stahl Industrie
Current assignee: Bergische Stahl Industrie
Publication date: 1926-11-27

Description

487894487894

Die Erfindung betrifft eine Verdrehmaschine für Kurbelwellen, die mit einer feststehenden und einer drehbaren Einspannvorrichtung zur Aufnahme je einer oder auch mehrerer Kurbeln der Welle versehen ist. Das Neue besteht darin, daß die drehbare Einspannvorrichtung von einem drehbar gelagerten und mit einem Antriebsvorgelege gekuppelten Ring getragen wird und aus zwei als Kle.mm·' ίο backen dienenden Hebeln besteht, die je mit ihrem einen Ende um zwei in quer zu den Hebeln verlaufenden Langlöchern verateilbare Zapfen drehbar und durch eine mit Rechts- und Linksgewinde versehene Spindel gegeneinander verstellbar sind, die ihrerseits an den beiden anderen Enden jedes Hebels angreift, während die feststehende Einspannvorrichtung zwei ebenfalls mittels einer in gleicher Weise ausgebildeten. Spindel gemeinao sam und geradlinig gegeneinander verschiebbare Backen auf einem Schlitten trägt, der in der Achsenrichtung des an der drehbaren Einspannvorrichtung vorgesehenen Ringes verstellbar ist.The invention relates to a turning machine for crankshafts with a fixed and a rotatable clamping device for receiving one or more Cranking the shaft is provided. The novelty is that the rotating jig is carried by a rotatably mounted ring coupled to a drive gear and consists of two as Kle.mm · ' ίο there are levers that serve to bake, each with one end by two in transverse to the Lever running elongated holes displaceable pins rotatable and provided with a right-hand and left-hand thread spindle are mutually adjustable, in turn at the other two ends of each lever attacks, while the fixed jig two also by means of an in trained in the same way. Spindle can be moved together and in a straight line against each other Jaws on a slide that carries in the axial direction of the on the rotatable Clamping device provided ring is adjustable.

Infolgedessen zeichnet sich die neue Maschine durch einfache und leichte Bedienung sowie dadurch aus, daß mit ihrer Hilfe auch solche Kurbelwellen eingespannt und bearbeitet werden "können, die sowohl in der gegenseitigen Entfernung der Kurbeln als auch in der Dicke der Kurbelwangen voneinander abweichen.As a result, the new machine is simple and easy to operate as well as the fact that such crankshafts are clamped and processed with their help can be "both in the mutual distance of the cranks as also differ in the thickness of the crank webs.

-Die Zeichnung veranschaulicht ein Ausführungsbeispiel des Erfindungsgegenstandes, und zwar zeigen:-The drawing illustrates an embodiment of the subject matter of the invention, namely show:

Abb. ι eine Seitenansicht,
Abb. 2 eine Draufsicht mit teilweisem Schnitt undFig. Ι a side view,
Fig. 2 is a plan view with partial section and

Abb. 3 eine Ansicht von dem in Abb. 1 rechten Ende.Fig. 3 is a view from the right end in Fig. 1.

Auf dem Bett« der Maschine steht eine senkrechte Wand b, in der ein Ring c drehbar gelagert ist. Dieser kann mittels eines auf seinem einen Ende befestigten Schnecken-Zahnkranzes d und einer darin eingreifenden Schnecke/ gedreht werden. Die Schneckenwelle g steht durch ein Zahnräderpaar h, i mit einer Welle k in Verbindung, die auf ihrem den Zahnrädern h, i entgegengesetzten Ende ein Reibrad ta trägt. Mit letzterem wirken zwei Reibrollen η, ο zusammen, deren Wellen in einem Schwinghebel ρ lagern, der aus einer im" wesentlichen "dreieckigen Platte gebildet ist. - Der Hebel ρ ist um die Antriebswelle q schwingbar, die durch einen endlosen Riemen/· o. dgl. mit einem Elektromotor oder einer anderen Kraftquelle gekuppelt ist. Die beiden Reibrollen η, ό sind dabei mit der Antriebswelle q durch drei Zahnräder s, t, ti gekuppelt, von welchen das auf der Welle q sitzende Zahnrads mit dem Zahnradi auf der Welle der Reibrolle η kämmt, während letzteres wiederum in das Zahnrad« auf der Welle der anderen Rolle 0 eingreift. Die beiden Reibrollen η, ο werden somit in entgegengesetztem Sinne gedreht. In der gezeichneten Mittellage des Schwinghebels ρ sind beide Rollen«,ο vom Reibradm entfernt, der Antrieb ist somit ausgerückt. Durch Schwingen des Hebels ρ nach rechts oder links, was durch ein in jeder Stellung sperrbares Hebelgestänge geschieht, kann wahlweise die eine oder andere Rolle η oder ο an das Reibrad OT angedrückt und dadurch unter Vermittlung des Vorgeleges k, i, h, g, f, d der Ring c beliebig im Uhrzeigersinne oder in umgekehrter Richtung gedreht werden.On the bed of the machine stands a vertical wall b in which a ring c is rotatably mounted. This can be rotated by means of a worm gear ring d attached to its one end and a worm / engaging in it. The worm shaft g is connected by a pair of gears h, i to a shaft k which carries a friction wheel ta on its end opposite the gears h, i. With the latter, two friction rollers η, ο work together, the shafts of which are supported in a rocker arm ρ , which is formed from an "essentially" triangular plate. The lever ρ can swing around the drive shaft q , which is coupled to an electric motor or other power source by an endless belt / or the like. The two friction rollers η, ό are coupled to the drive shaft q by three gear wheels s, t, ti , of which the gear wheel sitting on the shaft q meshes with the gear wheel on the shaft of the friction roller η , while the latter in turn meshes with the gear wheel « the shaft of the other roller 0 engages. The two friction rollers η, ο are thus rotated in opposite directions. In the drawn center position of the rocker arm ρ , both rollers ο are removed from the friction wheel m , the drive is thus disengaged. By swinging the lever ρ to the right or left, which is done by a lever linkage that can be locked in any position, one or the other roller η or ο can optionally be pressed against the friction wheel OT and thereby mediated by the intermediate gear k, i, h, g, f , d the ring c can be rotated clockwise or in the opposite direction as desired.

Der Ring c trägt an seinem dem Schneckenzahnkranz d entgegengesetzten Ende eine zur Aufnahme einer zu versetzenden Kurbel des Werkstücks geeignete Einspannvorrichtung. Diese besteht aus zwei als Klemmbacken dienenden Hebeln w, w, die mit ihren einen Enden um zwei Zapfen χ, χ drehbar sind, die ihrerseits wiederum in zwei quer zur Längenausdehnung der Hebel w verlaufenden Langlöchern y gegeneinander verstellt werden können. Die anderen Enden der beiden Hebel sind zwecks gemeinsamer gegenseitiger Verstellung durch eine Spindel ζ mit Rechts- undAt its end opposite the worm gear ring d, the ring c carries a clamping device suitable for receiving a crank of the workpiece that is to be displaced. This consists of two levers w, w serving as clamping jaws, one end of which can be rotated around two pins χ, χ , which in turn can be adjusted against each other in two oblong holes y running transversely to the longitudinal extension of the lever w. The other ends of the two levers are for mutual mutual adjustment by a spindle ζ with right and

Claims

Left-hand thread, which is attached to the ring in one between the two levers- | ten lugs 2 are stored. The clamping of a workpiece in the clamping device of the ring c is done in such a way that the two levers w are first brought closer to each other by adjusting the pivot pin λ: in the elongated holes y that they rest on both sides of the crank webs, whereupon the jaws w be pressed firmly against the workpiece by turning the threaded spindle ζ.

Opposite the end of the ring c carrying the jig is on the bed α of the machine a slide which is slidably guided in the axial direction \ of the ring c! th 3 arranged, which can be adjusted by means of a threaded spindle 4. This slide 3 carries a second clamping device ^:

for the crankshaft, which consists of two guides in the slide in a straight line against each other displaceable clamping jaws S, 5 exists. This can be done by a spindle 6 with right-hand and left-hand thread, which in two between the jaws 5, 5 on the slide 3 attached lugs 7 stores, common | sam can be adjusted to a crank of the Clamp the workpiece between them. The width of the clamping jaws 5 on the carriage 3, is expedient in such a way that it not only has one, but also two if necessary Can accommodate cranks that are adjacent to one another and cannot be offset against one another.

The operation of the new machine is as follows: The crankshaft j to be machined is introduced into the machine by passing through the j rings in such a way that a crank or a pair of cranks between the jaws 5, 5 of the carriage 3, the crank to be moved in contrast j of the jig w, w of the ring c j is located. By shifting the slide 21, the two clamping devices can be brought closer to or removed from one another in accordance with the distance between the cranks to be clamped. The crankshaft must of course be given such a position in the machine that its center line coincides with the axis of rotation of the ring c . After the cranks located in the clamping devices have been firmly clamped by pressing the jaws ii>, w and S, 5 against one another, the ring c, depending on whether the between the jaws. w, w located crank is to be moved to one side or the other, rotated clockwise or in the opposite direction by the desired angle, thus causing the crank to move. The angle of rotation can be read from a scale. This scale, which is not shown in the drawing, can be attached either to the ring C or to the wall b forming the bearing for this and interact with a pointer mark provided on the wall or on the ring. Once the one crank has been turned, the clamping devices w, w and 5, 5 are released. The crankshaft can then be moved in the machine in order to bring other cranks between the clamping devices, whereupon the play described is repeated.

Of course, various modifications of the drawn example are possible. E.g. Instead of just one clamping device, both clamping devices could if necessary rotatable around a common axis in the sense of moving the clamped cranks be arranged. The drive of the could also support the rotatable clamping device Ring instead of a friction gear reversing gear also contain a gear reversing gear. The illustrated friction gear however, it has the advantage of greater simplicity in setup and operation.

Godfather ν ta ν s ρru c η:

Twisting machine for crankshafts with a fixed and a rotatable clamping device for receiving one or more cranks of the shaft, characterized in that the rotatable clamping device is carried by a rotatably mounted ring (c) coupled to a drive train and consists of two as K3.emm .bakken-serving levers (w, w) , which can be rotated at one end by two pins (x, x) ^{adjustable in oblong holes (j 1} , j) running transversely to the levers and by a spindle (2) with right-hand and left-hand thread, which act on the two other ends, are adjustable against each other, while the fixed clamping device carries two jaws (5, 5) on a slide (3) that can also be moved together in a straight line by means of a spindle (6) with right-hand and left-hand threads, which is adjustable in the axial direction of the ring (c) of the rotatable jig.

1 sheet of drawings.