DE114954C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

In the case of turret lathes, the switching of the turret head from one in a subsequent position of use almost generally by means of two actuated one after the other Handles causes one of which the triggering of the turret in his respective position of use receiving locking device and the other the rotation of the Turret made possible.

The subject of the present invention is a turret head which is set up in this way is that if only a single handle is turned, the locking device is released, the rotation of the turret and the locking of the latter in its position of use be effected completely automatically and in the correct order, so that one incorrect setting is completely ruled out and, at the same time, considerable time savings is achieved when indexing the turret head. This purpose is in the way achieves that the axis of rotation of the turret head and at the same time the clamping screw of the same forming screw bolt loosens during its rotation and at the same time by means of one Gesperres takes a switching ring, which in turn by means of a curve push the Detection of the turret causing locking bolt is gradually depressed. As soon this triggers the locking device, the turret is turned on further rotation the clamping screw dragged along by friction until the said locking bolt is released again by the switching ring and the turret in the next following Determines the position of use. If the clamping screw is now turned back again, it comes the mentioned, effective locking mechanism between the clamping screw and the switching ring, so that the locking device is no longer influenced and the turret through the The clamping screw is pressed firmly onto the support.

The new turret is illustrated in the accompanying drawings in one embodiment, namely the same is shown in Figs. 1 and 2 in the basic and elevation, while in Figs. 3 to 6 of the shift ring moved by the locking mechanism with the locking bolt is shown in two different positions in the top and bottom riffs.

The rotatable upper part α of the turret head, which is provided on the circumference for receiving the various tools, in the present case with six equally spaced openings b , is placed on the. Lathe transversely displaceable sub-part c held by the centrally arranged and threaded bolt d at the lower end, which thus simultaneously serves as the axis of rotation of the turret head and as a clamping screw of the same. If the said screw bolt is rotated by means of the handle e attached to its upper end in the direction of the arrow shown in FIG. 4, the screw bolt is first loosened. At the same time, by rotating the latter, the switching ring f , which is arranged concentrically to it and loosely mounted in a cavity of the lower part c, is carried along, by means of a locking mechanism, which consists of a

Claims (1)

bolt d and transversely to the same arranged spring bolt g and consists of two spiral ratchet teeth hh located on the inner circumference of the switching ring. The switching ring entrained by this locking mechanism during the indicated rotation of the clamping screw now triggers the locking bolt i, which holds the upper part α in its position, in the following way: The above-mentioned locking bolt, which is always pressed upwards by a spring k , which usually protrudes into one of the openings / located on the underside of the upper part at the same distance from one another and thereby fixes the upper part, has a lateral extension m, the end of which is just below of the switching ring f is located. The underside of the latter is now, as can be seen by name from FIGS. 3 and 5, designed to have two screw-like curved surfaces η, η each running over a semicircle, one of which has the attachment m of the locking bolt that is in direct contact with it in the previous one mentioned rotation of the switching ring is gradually depressed. Once in this case the upper end of Arretirbolzens has / leave the opening (Fig. 5), which occurs approximately at the points in time when the bolt d with the switching ring _^2/8 of a half rotation is carried out, the approach m in the flat part of the Curved surface η reached , so that it remains with the locking bolt in the height position illustrated by FIG. By now the bolts d the last third of his half turn completed it, since the Arretirvorrichtung i triggered to take the upper part in manner to be explained by friction, the latter Y ₃ to half revolution, ie Ve DAF ei ^ner complete revolution executes. Taking away the upper part by friction is made possible by the following device. ' On the outer circumference of the screw bolt d sits above the turret head, the ring 0, but in the centric bore of said head, the sleeve p, which carries an annular shoulder q at the lower end. Ring 0 and sleeve ρ are prevented from rotating on the screw bolt d by a common wedge r, which, however, a longitudinal displacement of said. Parts on the screw bolt. The sleeve ρ is pressed upwards by a compression spring s located between it and the screw bolt, the lower end of which rests on a ring t , so that the rotatable upper part α between the surface u of the attachment q and the surface ν of the ring 0 to a certain extent Pressure is jammed. In order to be able to regulate this pressure, the ring t , which forms the lower support point of the compression spring s, is not fixed on the circumference of the screw bolt d, but is displaceable; this displacement is effected by a cotter pin engaging the ring and protruding through a slot w of the screw bolt d χ makes it possible, which sits at the lower end of the bolt y , which is displaceable in a centric longitudinal bore of the screw bolt. The latter carries at its upper, threaded end the nut ^, which is supported on the upper end of the screw bolt d , so that by turning the said nut, the height of the ring t can be changed and the pressure of the spring can be regulated. When turning the clamping screw d , as long as the upper part α is still held in its position by the locking bolt i , the surfaces u and ν on the upper part α are grinded. During the last third of the movement, however, i.e. when the locking device of the turret head is triggered (Fig. 5), the rotatable upper part α is carried along by the rotating clamping screw d due to the friction occurring due to the spring pressure on the surfaces u and ν . As soon as the latter, and with it the switching ring f , has exactly completed half a turn, the attachment m of the locking bolt i has reached the end of the curved surface η and slides off the same, with the locking bolt jumping into the next one of the openings I and thus the upper part α in, its next use position. If the handle e is now turned back, the locking mechanism g, h comes into contact, and the spring bolt g is pushed back by the spiral-shaped inner surfaces of the teeth h until, after completing half a turn, the spring bolt slides off the end of the tooth h and again takes his first attack position. The switching ring f is here held in its position by the shoulder m , which also forms a lock when the clamping screw is turned back with the curved surfaces η. The upper part a thus remains in a locked state, so that the surfaces u and ν rub against the upper part during the above-mentioned reverse rotation, the latter being simultaneously pressed down onto the lower part c by tightening the thread of the clamping screw. Pate nt-An s ρ rüche: ι. Turret head for lathes, characterized by which, when turning a single handle (s), take place automatically one after the other. solution, switching and locking of the turret head in such a way that the pivot pin (d) , which at the same time forms the clamping screw of the turret head (a, c), is rotated by means of a locking mechanism (g, h) and has a fixed base (c ) loosely mounted switching ring (f) with it, which latter by means of a Curve thrust (n, m) that triggers the rotatable upper part (a) in its respective position of use, retaining detent (i), whereupon upon further rotation of the clamping screw (d) of the upper part (a ) is carried along by friction until the locking device released again by the switching ring fixes the upper part in its subsequent position of use, while when the clamping screw is turned back, the switching ring is held by the curve thrust (m, n), which now acts as a lock, and the upper part by tightening the Clamping screw is firmly pressed onto the base. An embodiment of the turret head according to claim i, characterized in that the friction causing the entrainment of the upper part (a) in the last part of the tensioning screw rotation is pressed against each other by the clamping of the said upper part between two by spring pressure (spring s) on the circumference of the tensioning screw displaceably but non-rotatably arranged parts (ring ο and bush ρ) is produced in such a way. that the rotation of the clamping screw (d) with the upper part locked causes the pressure surfaces (u, vj ) to rub on the same, while when the lock is released, the upper part is carried along by the friction occurring on the pressure surfaces mentioned. 3. An embodiment of the turret head according to claim 1 and 2, characterized in that the ring (t) forming the lower spring support point from the lower end of a bolt which is longitudinally displaceable within a central bore of the clamping screw (d) and is provided with a regulating nut (%) at the upper end (y) is detected so that the spring tension and thus the friction occurring on the pressure surfaces (u, v) can be changed by turning the regulating nut. 4. An embodiment of the turret head according to claim 1, characterized in that the locking ring (f) which triggers the locking device (i) is provided with two different and alternately effective ratchet rings (h and n) , one of which (h) on the The inner circumference of the switching ring is seated and consists of spiral-shaped teeth that are in engagement with the spring bolt (g) of the clamping screw (d) , while the other is located on the underside of the switching ring and rises like a screw, with the shoulder (m) of the locking bolt ( i) has engaged teeth. 1 sheet of drawings.