SU1317477A1 - Driving unit - Google Patents

Abstract

The invention relates to magnetic recording and allows improving the dynamic characteristics of a node by reducing the time it starts and stops. Coaxially to the drive shaft 3 of the assembly is placed a ring 9 of the U-shaped profile, one of the cheeks of which forms a washer-shaped magnetic conductor 12. The disc 5 is braked when the assembly is turned off by the force of the release springs 15, pressing the magnetic conductor 12 with the friction element 13 to the disc 5. By applying voltage to the windings 7 of the inductor 6, leading to the movement of the washer-shaped stops 10 of the ring 9, the disk 5 is disinhibited. 2 Il. "Ti 7 IZ sl //// // / 777 V // С I со 4 сриг.1

Description

The invention relates to a magnetic recording technique, namely to nodes of a tape-carrying mechanism.

The purpose of the invention is to improve the dynamic performance by reducing the time of starting and stopping the master node.

FIG. 1 shows the proposed node, the axial section; in fig. 2 - installation of one of the ring options.

The device contains a bearing shield 1, on the bearing supports 2 of which a drive shaft 3 is installed with a driving roller 4. A shaft 5 is fixed on shaft 3 and placed against the inductor 6 with a winding 7. A flange 8 is attached to the backing board 1 above the disk 5. Coaxially to the drive shaft 3 set ring 9 U-shaped profile. One cheek ring 9 is a washer-shaped stop 10. In FIG. 2, the stops 10 are made in the form of protrusions 11, evenly placed around the circumference of the ring 9. The other cheek ring 9 forms a tongue-shaped magnetic circuit 12 to which the friction element 13 is attached. For mounting the ring 9 in the flange 8, grooves 14 are made through which the projections 11 are inserted after which the ring 9 is rotated and secured in a position in which the protrusions 11 are above the release springs 15. The ring 9 is secured with screws 16, which do not prevent the ring 9 from moving freely along the shaft 3.

The device works as follows.

The torque is created in the node by an end-face inductor 6 due to the interaction with the field of the eddy currents of the disk 5. The disk 5 is made of a non-magnetic mat.

Q

0

rial At the same time, the field of the inductor 6 interacts with the washer-shaped magnet cable 12, attracting the latter and moving the ring 9 and the stops 10, while squeezing the springs 15 are compressed and the disc 5 is released.

For braking and stopping the disk 5, the voltage is removed from the winding 7 of the inductor 6. The force of the squeezing springs 15 of the magnetic circuit 12 with the friction element 13 is pressed against the disk 5, stopping the latter and decelerating while the node is turned off.

Due to the synchronous interaction of the elements of the drive and braking (ramming), as well as by eliminating the intermediate controls, the time of starting and stopping the master unit is reduced.

Claims (1)

Invention Formula The drive unit contains a shaft mounted in bearing bearings with a coaxially mounted disk, an inductor placed against the disk, squeezing springs, a friction element and a supporting shield, in the central sleeve of which bearings are placed, in order to improve the dynamic characteristics , it is equipped with a U-shaped ring profile, while the sub shield is made with a flange, the ring is installed to cover the flange ring, the disk and the friction element sequentially mounted in the inner cavity, n The last of which is attached to the ring, and between the rings and the flange mounted squeezing springs. lp 7B Compiled by G. Zububny Editor N. Gorvattehred I. VeresKorrektor I. Erdeyi Order 2296/46 Circulation 589 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 1 13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4