DE381718C - Device for assembling commutators - Google Patents

Description

The invention relates to a device for assembling commutators the commutator bars after insertion by ring-shaped pressure jaws, whose inner surfaces adapt to the outer circumference of the commutator, against a Commutator bushing are pressed radially inwards. From the known devices of this type, the new one mainly differs in that in the axial direction of the Commutator also pressed bodies are arranged, which at the same time on the end faces exert a pressure and are designed so that thereby in cooperation with the radial pressure jaws the segments are attached to the commutator socket.

An exemplary embodiment of the subject matter of the invention is shown schematically in the drawing shown.

Fig. Ι is a floor plan with the ram removed,

Fig. 2 a section along line xx in Fig. Ι with the punch raised,

Fig. 3 the same section with the punch lowered,

Fig. 4 is a diagram of one of the movable press jaws.

Rise above the surface of the base plate 1 short sturdy posts 2. Between these are the jaws 3, whose here there are six. These have segmental shape and form in their entirety a strong flat ring or cylinder. They rest with radial mobility

on the flat surface of a support plate 4, which is inserted into a recess 5 (Fig. 2) in the upper part of the base plate 1 is inserted and below has a projection 6, see in a bore 7 of the base plate 1 leads vertically. The plate 4 is usually held raised by springs 8.

Abspreizarme 9 are with their pin-shaped heads in corresponding bearing sockets

ίο 11 of the post 2 and the one with them in radial Aligned jaws 3 used.

The inner surfaces of the segment jaws 3 are designed exactly in accordance with the outer surface of the commutator and take between them a corresponding number of commutator webs α with radial connecting pieces b . These webs are on both sides, as indicated at c , grooved in the usual way, for the purpose of receiving clamping rings d. In the illustrated embodiment, the lower clamping ring d consists of one piece with the commutator socket e. In the middle of the support plate, an anvil 12 with a raised extension 12 ° is embedded above, which fits into the lower end of the sleeve e. On the other hand, an anvil 13 is attached in the middle of the ram 14. This has a downwardly projecting central extension 13 °, conaxially with the anvil 12. This extension 13 ″ fits into the upper end of the sleeve e and is surrounded by an undercut annular groove 15.

The device works in the following way: The webs with the usual insulation, the sleeve and the clamping rings are loosely inserted in the prescribed composition into the annular space formed by the inner surfaces of the jaws 3, whereupon the ram 14 is lowered. The downwardly directed approach of the anvil 13 enters the upper end of the sleeve e . As the ram descends further, the tension of the springs 8 is overcome, so that the jaws 3 and the support plate 4 move downwards until the latter touches the bottom of the recess 5. During this movement, the inner ends of the arms 9 swing downwards and inwards until the arms are almost level. The pressure jaws 3 are thereby strongly pressed towards the center and press the various parts of the commutator radially against the vertical axis, these parts being centered, pressed together and precisely aligned at the same time. When the ram descends, the groove 15 receives the upwardly projecting end of the sleeve e . As a result of the shape of this groove described above, the anvil 13 acts as a dishing die and folds the upper end of the sleeve outwards over the upper clamping ring d . Now the various parts of the commutator are pressed exactly into the correct position and held in it. When the punch 14 now goes up again, the springs 8 press the support plate and with it the jaws 3 upwards, which are retracted radially by the vibration of the arms 9 and release the commutator, which can thus be freely removed. The device is now immediately ready for a new operation.

Claims (4)

Patent Claims: i. Device for assembling commutators, in which the commutator bars after insertion through ring-shaped pressure jaws, the inner surfaces of which are aligned with the outer circumference of the commutator adapt, are pressed radially inwards against a commutator socket, characterized in that that pressed bodies (12, 13) are also arranged in the axial direction of the commutator are, which simultaneously exert a pressure on the end faces and are designed so that they work together the segments are attached to the commutator socket with the radial pressure jaws. 2. Apparatus according to claim 1, characterized in that the radially movable Pressure jaws are connected to the base plate by rotatably mounted spreading arms and on a support plate rest, which is resiliently mounted in a recess in the base plate and under the influence of one with the pressure jaw assembly coaxial ram against the bottom of the recess or otherwise against a stop lays. 3. Apparatus according to claim 1 and 2, characterized in that with the Press jaw assembly coaxial ram carries an anvil with a projecting central shoulder, while the platen has an opposite anvil. 4. Apparatus according to claim 3, characterized in that the one anvil (13) is designed as a Kümpelgesenk for the insert sleeve (e) of the commutator. 1 sheet of drawings.