SU1004696A1 - Reversing mechanism - Google Patents

Description

(54) REVERSIBLE MECHANISM

The invention relates to mechanical engineering f, in particular, to drives for reversing movement of tables, and can be used in installations for spraying coatings, paint and varnish installations, etc.

A reversing mechanism is known, comprising a table mounted in a directional bed, a transmission with a flexible link and a switching unit. The switching unit is made in the form of a flip carriage, hingedly connected with the flexible coupling element tl.

The disadvantages of this mechanism are the complexity of the design, the impossibility of stopping the table at given points without turning off the drive, and the short service life of the flexible coupling transmission and switching unit in dusty environments.

The purpose of the invention is to increase reliability and simplify the design.

This goal is achieved by the fact that in a reversible mechanism containing a table mounted in guide beds a transfer with flexible coupling and a switching unit, the switching unit is made in the form of two electromagnets with friction pads, interconnected springs and interacting with the transfer with a flexible coupling, and the mechanism is equipped with a device for positioning, represented by adjustable magnets mounted on the table along the guides, and a sensor mounted on the frame and electrically connected th with elektromag10 nitami.

FIG. 1 shows the mechanism, a general view; in fig. 2 is a section A-A in FIG. one.

The mechanism contains a table 1, mounted in the statins 2 guides. A bracket 3 is attached to the table 1, on which is placed the switching unit in the form of two oppositely installed push electromagnets 4

20 and 5, at the ends of the cores of which the friction pads 6 and 7 are installed. The friction pads 6 and 7 are interconnected by tension springs 8.

25

Claims (1)

On statin 2, a transmission with a flexible coupling is mounted, the branches 9 of which are arranged to the bridge between the bracket guides 3 and the friction blocks B and 7 and cover the pulleys 10. Transmission is made of a belt. Statin 2 also has adjustable stops 11 that control limit switches 12 mounted on table 1. The positioning device is designed as adjustable constant magnets 13 mounted on table 1 and sensor 14 configured as a reed switch mounted on a frame 2 The mechanism works as follows. When the drive is permanently turned on (not shown), they include an electromagnet 4, which presses the lower numerical branch 9 of the belt drive to the lower guide bracket 3 by the block 6, and the one hundred moves in the direction of movement of the lower branch 9, i.e., to that left when the left stop 11 by the limit switch 12 does not turn off the lower electromagnet 4 and turns on the upper electromagnet 5. At the same time, under the action of the springs 8, the pad 6 releases the lower branch of the belt drive, and the pad 7 under the action of the electromagnet 5 presses the upper branch 9 of the belt gear nvdey guided to the upper bracket 3 and the table 1 is moved in the direction of movement of the upper branch, ie. e, entitled Reverse a rightmost position occurs and, nalogichno. The table is stopped during the passage of one of the permanent magnets 13 installed at the places of the necessary stops near the sensor 14, the latter turning off both electromagnet 4 and 5 simultaneously. At the same time, under the action of the springs 8, the pads 6 and 7 release both branches of the belt 9, and the table 1 stops. The table is restarted from the control unit (not shown), and the cycle is repeated. The invention allows for reversible movement of the table with one or several stops at any points and ensures the operation of the mechanism in dusty environments. Claims. A reversing mechanism comprising a table mounted in the bed guides, a transmission with a flexible coupling and a switching unit, characterized in that, in order to increase reliability and simplify the design, the switching unit is made in the form of two electromagnets with friction pads interconnected by springs , and interacting with the transmission with a flexible connection, and the mechanism is equipped with a positioning device, which is adjustable along the guide permanent magnets mounted on the table, and the sensor is installed Statins on and electrically coupled to the electromagnets. Sources of information taken into account in the examination 1.- Jones F.D. and others. Mechanisms of automatic action. M., 1961, p. 637 (prototype). t 1J