RU2557347C1 - Coupling of crank-conrod press - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: drive of coupling of crank-conrod press contains support, driven, and pressed with friction elements discs, movement drive of the pressed disc with end rotors located in the magnetic flux with stators installed on the base, stators are made in form of two sets, they surround the rotor discs, at that the stator sets located between the rotor and modules in zone of the rotor shafts are installed on radial secured guides.

EFFECT: simplified design and improved response.

3 dwg

Description

The invention relates to mechanical engineering, in particular to a drive of friction couplings of crank presses, mainly with a disk working surface.

Known design of pneumatic actuators couplings [Forging and stamping equipment: a textbook for high schools / A.N. Banquet and others, ed. A.N. Banquetova. - 2nd ed., - M.: Mechanical Engineering, 1982, §3.3, p. 62-69], having support discs, diaphragms, feed heads, which operate in such a way that the membrane displaces the pressure disk during air inlet, the inserts are clamped between the support pressure plates, due to which a friction moment arises.

The closest analogue in terms of essential features is a friction clutch drive [USSR AS No. 666328, application No. 2338338 / 25-27 of 03.22.76, publ. 06/05/79, bull. No. 21 / A.V. Novikov, V.V. Kornilov, V.V. Karzhan A.G. Krupenko, - / friction clutch], containing a flywheel with a housing having windows on a cylindrical surface, and a drive disk mounted therein, interacting through friction linings with a driven disk having holes, in order to increase service by reducing thermal stress, it is equipped with deflectors mounted on the ends of the driven disk, and the flywheel has a hub and a rim rigidly connected to each other by radially spaced ribs, and the latter are made in the form of fan blades.

The disadvantage of this drive is the need to use two energy carriers: electric energy, compressed air energy (pneumatic), low efficiency, the possibility of the release of oil vapor in the atmosphere of the workshop, a lot of noise when exhausting from pneumatic cylinders.

The invention is aimed at simplifying the design, improving performance while providing great effort, evenly transmitted to the area of the pressure disk.

This is achieved by the fact that in the drive of the clutch of the crank press, containing the supporting, driven and pressure plates with friction elements, the drive for moving the pressure disk with end rotors located in the magnetic flux with stators installed on the base, according to the invention, the stators are made in the form of two sets that cover the rotor disks, while the stator sets located between the rotor and the modules in the area of the rotor shafts are mounted on radial fixed guides.

The invention is illustrated in the drawing, where in FIG. 1 shows the claimed drive of the press clutch, a section in the vertical plane in the assembled state (modules of the internal stator in the normal position), FIG. 2 - the claimed drive of the press clutch, a cut in a vertical plane in the position preceding the assembly (the internal stator modules are pulled out), in FIG. 3 shows a kinematic diagram of one of the drive modules.

The drive of the press clutch includes a flywheel 1, on which a support disk 2 and a cover 3 are fixed. The cover is fixed with studs 4. The flywheel is mounted on the shaft cantilever, the rotation of the shaft is transmitted by the driven disk 5 located on the shaft splines. In the disk 5, friction inserts 6 of a material such as retinax or ferrodo are installed. There is also a pressure disk 7. The pressure disk has an annular recess, a rack 8, which is installed on the press frame. External 9 and internal 10 ring stators are fixed on the rack, which are connected through an air gap to a disk rotor 11 mounted on shafts 12 of modular drives, which include a gearbox and a torque converter, which are located in the housing 13. The pressure disk 7 is guided and fixed along the slots 14 and moves due to the extension of the rods 15 of the actuators. In addition, springs 16 are installed on the periphery of the flywheel 1 and the pressure plate 7. In the center of the rack 8 and the cover 3 there are holes for servicing the clutch. It should be noted that one of the outer ring stators 9 is located on radially fixed guides 17, which are fixed by a bolt 18. The rod 15 moves in the translational guides 19, has an internal thread 20, which, through the rolling bodies - balls 21, interacts with the lead screw 22, which is installed on one shaft 23 with gear 24 with internal gearing. A gear wheel 25 with internal gear is fixed inside the module case. The rotor 11 rotates the gear 26 of the external gear, which is mounted on one shaft 12 in the bearing 27 with the rotor. Between the wheels 24 and 25 on the one hand and 26 on the other hand there are several satellites in the carrier 28. Each of the satellites is a gear block 29 of two gears that rotate on the shafts 30 in the bearings 31 of the carrier.

The drive of the press clutch works as follows: when giving a command to turn on, the stator modules are connected to the network, and the direction of movement of the field in the modules of the internal and external stators is the opposite. If, for example, it is assumed that the direction of movement of the field in the internal stators is clockwise and that of the external ones counterclockwise, then, as can be seen from FIG. 2, a torque occurs in the disk rotors 11 of the asynchronous type, causing the rotors to rotate counterclockwise. The rotation of the rotors 11, and therefore of the shafts 12, leads to the rotation of the gear wheel 26 of the gearbox and the torque converter, which converts the torque of the output shafts of the gearboxes in the movement of the rod 15 from right to left. The rods move the pressure disk 7, compress the springs 16 and press the pressure disk 7 to the inserts 6. The inserts 6, mounted in the seats of the disk, are clamped between the support 2 and pressure 7 disks, due to which there is a friction moment transmitted to the shaft, the rotors 11 are locked, stator the elements are turned off, the press moves, then the stator elements turn on in the opposite direction, the rotors rotate in the opposite direction, the rods 15 move from left to right, the disk 7 moves to the right under the action of the springs 16 along the slots 14, the coupling between the inserts 6 of the driven disk 5 and the supporting disk 2 is interrupted, the kinematic connection between the flywheel and the press shaft is broken, the voltage from the stator elements is removed, the drive is ready to repeat the cycle.

This design in comparison with the known analogues has the following technical and economic advantages:

1. there is no need for compressed air;

2. the presence of several modules leads to the spread of the effective air gap over the entire surface of the external and internal stators, which ensures the uniformity of the occurrence of large forces transmitted to the area of the pressure disk - at least 6 contact points;

3. since to turn on the clutch and accelerate the driven parts in a short time, it is necessary to significantly less than the calculated one taken from the condition of overcoming the useful resistance, it becomes possible to control the inclusion by setting some optimal law for the inclusion of stators, and this law can be continuous instead of two-stage, which is usually used in pneumatic drives.

Claims (1)

A clutch of a crank press, containing supporting, driven and push with friction elements disks, a drive for moving the pressure disk with end rotors located in the magnetic flux with stators installed on the base, characterized in that the stators are made in the form of two sets that cover the disks rotor, while the stator sets located between the rotor and the modules in the area of the rotor shafts are mounted on radial fixed guides.

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