DE386218C - Process for the production of gears, racks and similar workpieces - Google Patents

Description

■ λ

ISSUED
ON DECEMBER 17, 1923

REICH PATENT OFFICE

PATENT LETTERING

- JVl 386218 - CLASS 7f GROUP 1

Gregor Kowarski in Berlin.

Milled or planed teeth on gears or racks make this possible most precise cooperation of power transmission means of this kind. Because now the production of milled or planed teeth is extremely expensive at the moment, becomes brought the invention according to a method used that 'with sufficient accuracy a cheaper production

ίο enables.

This method consists in the fact that several parallel adjacent tooth profiles are produced in straight, wide bars by rolling. When the rolling process has ended, which is expediently in a warm state of the workpiece is carried out, then the rolled workpiece is expediently subjected to a cold drawing process, which gives the individual teeth their final shape

ao and, if necessary, the entire workpiece is given a curvature according to an arc of a circle. Finally, the workpiece obtained in this way becomes transverse to the rolling direction disassembled into individual parts corresponding to the widths of the zahrf, and the individual wreath parts are put together to a wheel or the individual straight rod pieces for production attached to a rack one behind the other.

The individual gear rim or rack parts are either fastened by Screwing the individual parts onto the wheel rim of a wheel or onto a straight rod or by claw connection. For this purpose are in the individual gear rim parts or rack parts provided on both sides grooves in which on the wheel rim or on a straight rod seated claws intervene.

The joints between two adjacent ring gear parts or rack parts can be in Direction of the teeth or obliquely through several teeth. In the latter Fall are the force pressures on the joint parts of the teeth of two individual parts recorded at the same time.

In the drawing there are some pictures showing the course of the process reproduced.

Fig. Ι shows the product, which after the implementation of the first stage of work arises;

Figure 2 is an end view of Figure 1;

Fig. 3 illustrates the workpiece that went through the drawing process and at which at the same time the workpiece has been given a curvature during the drawing process;

Fig. 4 shows on an enlarged scale to Fig. 1 to 3 a type of attachment of the individual Workpieces on a wheel;

Fig. 5 is a side view of Abbot ». 4;

Fig. 6 shows a one passed through successive individual workpieces oblique cut at the joints.

In the first working cycle , a straight, full workpiece 1 is sent through a roller train, the individual teeth 2 being formed in one working cycle. If the rolling process is finished, then

the workpiece is either warm or appropriately cold drawn. The ring gear 3 is given a curvature and the teeth 2 their final shape required after the curvature has taken place.

According to Figs. 4 and 5 there is a hub 5 and disk 6 on the shaft 4 Wheel fastened with inwardly directed claws 7. These claws grip in ring-shaped ones Grooves 8 of the ring gear parts 3. The individual ring gear parts 3 are inserted into the ring-shaped claws 7 and thereupon clawed rings 10 in the opposing grooves 11 of the ring gear parts 3 inserted and held by screws 12, the ring gears in position.

The joints between the individual sprockets can run in the direction of the teeth; she but can also, as Fig. 6 shows, receive an oblique joint 13, 14, which through passes through several teeth.

The attachment of the ring gear to the wheel rim can also take place in that the individual gear rings attached to the rings of the receiving wheels by screws will.

Claims (1)

Patent claim: \ ^r experienced in the production of gears, racks and similar workpieces, characterized in that several adjacent tooth profiles are produced in a straight, wide bar by rolling, whereupon the rolled workpiece is subjected to a drawing process, which gives the individual teeth their final shape and during manufacture gears also give the workpiece a curvature according to an arc of a circle, and finally the workpiece created in this way is broken down transversely to the rolling direction into individual parts corresponding to the tooth widths, which are put together to form toothed rings or racks. Fig.i. Fig. 4. Fig. Fig. 3. Fig. Fig. 6.