SE442689B - LOAD DRIVE DEVICE WITH FINAL DISCONNECTING TO POWER STEER SWITCH FOR STEP TRANSFORMERS - Google Patents

Description

8106521 ~ 1 2 for this edge the clamping disc 4 is arranged, which disc is fixedly connected with the drive shaft '5 over fitting wedges 12. The clamping disc 4 is so designed that one at six places between the inner circular periphery 9 of the drive wheel 2 and the periphery of the clamping disc 4 has a gap 10, 11, which becomes narrower resp wider. At each of the tapered places 10, 11 there is one clamping roller 14, 15, with it at each place between a shoulder 13 on the clamping disc 4 and a clamping roller 14 and 15, respectively, there is a compression spring 18, 19, which pushes each roller into the tapered locations 10, 11 over one pressure part 22, .23. On the locking disc 6 there are three carriers 20, which 'engages in a star-shaped part 21, which projects into the gap between the clamps disc 4 and edge 8 of the drive wheel 2 with a stop 16, 17 for each clamp roll 14.15. The stops 16, 17 are arranged so that a clamping roller, e.g. . 14 and 15, respectively, are assigned to each stop, eg 16, 17, each stops 16, 17 lie on the side of the respective clamping roller 14 and 15, respectively facing away from the compression spring 18 and 19, respectively. The spar plate 6 'is further provided with locking cams 24, 25 for each direction of rotation, which are in height with the ratchet 7, so that the ratchet 7 can, depending on the direction of rotation intervene behind a locking cam.

The new load drive device works as follows: The drive wheel 2 is driven in the usual way from the outside, for example in the direction of the arrow, by means of a shaft 26, a conical wheel 27 and an axial ring gear 28.

As a result, a force connection occurs between the clamping rollers 14 the edge 8, 9 of the drive wheel and the clamping disc 4, so that the latter is pulled along. Thus, while the clamping disc 4 is rigidly connected to the drive shaft 3, it is transmitted the rotational movement of the drive wheel 2 to the drive shaft 3. Also the locking disc 6 is involved in the rotational movement, since friction coupling occurs between the axial shoulder 5 and the locking disc: 6. If now the drive wheel 2 rotates direction is reversed, it is canceled without any delay of the clamps 14 provided the power closure, and new power closure provided by the clamping rollers 15. This change of leg closure is completed boarded virtually without any delay, because it there are no gaps to traverse.

Based on the original direction of rotation according to the arrow it is assumed that the associated step switch has reached its end position and that in order to prevent passage past the end position the load drive device must disconnected. For this purpose, when the step switch is reached, even end position ratchet '7 - as indicated by the dashed arrow - so that it comes into contact with it for this direction of rotation seen the locking cam 24 on the locking disc 6, whereby the locking disc is instantaneously will be maintained. This results in the overcoming of the friction coupling a relative movement between the locking disc 6 and the clamping

Claims (1)

8106521-1 3 the disc 4, which again means that the stops 16 come into abutment against the clamping rollers 14. This eliminates the force connection between the drive wheel 2 and the clamping disc 4, ie the clamping rollers are pushed out of the narrower places 10. The drive wheel 2 can then run freely. The abutment surfaces of the abutments 16 and 17 are thereby inclined, so that when the abutment, for example 16, hits the ball, for example 14, the latter is pushed away from the edge 8 of the drive wheel, which facilitates the disconnection. A new power closure occurs only when the pawl 7 swings back to its basic position, which generally occurs when the direction of rotation of the load drive device is reversed when either end position is reached. Further friction coupling 29 hereby ensures that the clamping disc 4, which is of course first disconnected, is immediately pulled along, whereby the force connection acting for the second direction of rotation is effected by means of the clamping rollers 15 in the constrictions 11. It should be readily apparent that in the foregoing described process proceeds in exactly the same way at the now opposite direction of rotation. For the disconnection at the opposite direction of rotation, however, the locking cam 25 and the stop 17 are responsible. Patent claim: Load drive device with end position disconnection for driving step switches for step transformers with a drive wheel 6 (2) mounted in a housing and a drive shaft arranged centrally in relation to the drive wheel (3) and with a locking disc (6) rotating together with the drive shaft (3), which can be blocked in both directions of rotation by means of an outer hook (7), wherein inside an edge (8) of the drive wheel arranged, between drive wheels (2) and drive shaft (3) actuating coupling elements (14, 15) are releasable by means of several stops (16, 17) seated on the pulley, characterized by the following combination of features: The inner edge (8, 9) of the drive wheel (2) is circular; inside the edge (8, 9) there is a clamping disc (4) fixedly connected to the drive shaft (3); between the inner edge (8, 9) of the drive wheel (2) and the periphery of the clamping disc (4) there is a gap (10, 11) in at least two places, which becomes narrower and wider, respectively; at each tapered point (10, 11) there is a clamping roller (14, 15) which is pressed into the tapered part by means of a spring (18, 19); the locking disc (6) rotating together with the drive shaft (3) is mounted on an axial shoulder (5) on the clamping disc or on the drive shaft (3); and each core (14, 15) is provided with a stop (16, 17) coupled to the ratchet disc (6), which reaches into the gap (10, 11) between the inner edge (8, 9) of the drive wheel and the clamping disc (4) , and lies on the side of each clamping roller (14, 15) facing away from the spring (18, 19).