RU2504474C2 - Crank press brake - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used in crank press brakes. Said brakes serve to absorb energy of press clutch drive part after clutch is disengaged and to retain actuator jointly with drive part in position that corresponds to press slider to position. Brake comprises bearing, drive and pressure plates, pressure plate drive and cover. Drive is composed of modules. Every module comprises slider and end motor with inner and outer ring-like stators. Stators are mounted at press bed to get in magnetic contact with disc rotor. Rotor shaft is engaged via planetary reduction fear and torque converter with slider.

EFFECT: simplified design, accelerated operation.

2 dwg

Description

The invention relates to mechanical engineering, in particular to the design of brakes of crank presses designed to absorb the energy of the driven part of the press clutch after it is turned off and the actuator is held together with the drive part in the position corresponding to the upper position of the slider.

Known design of brake drives [RF Patent No. 2340807 C1 - Crank press brake / L.M. Litvinenko, A.P. Shalnev, V.A. Crook, G.V. Resurrection, publ. 12/10/2008, bull. No. 34 ;. RF patent No. 2340808 C1 - Crank press brake / L.M. Litvinenko, A.P. Shalnev, V.A. Crook, G.V. Resurrection, publ. 12/10/2008, bull. No. 34), comprising a housing, a pressure disk, a pneumatic piston, brake springs, a cover and a seal, a process lubrication pump, a gear unit with a clamping pneumatic cylinder is pivotally mounted on the housing, while a friction roller in contact with the brake disc is mounted on the input shaft of the gear unit, while the brake disk is mounted on the drive shaft, and the output shaft of the gear unit mounted on the bracket is connected to the shaft of the asynchronous generator, while the output shaft of the gear unit is connected to the additional th technological lubricant pump, which is installed parallel to the main process pump lubricant.

Closest to the claimed but a combination of essential features is a brake containing a driven shaft, a brake disk with friction elements located between the pressure and thrust disks, and a pneumatic cylinder, the housing of which is rigidly connected to the thrust disk, in order to reduce wear of the friction elements and energy losses, the brake is equipped with a planetary gear including two central wheels of external and internal gearing, freely mounted on the driven shaft, satellites and a carrier mounted on the shaft, moreover, the internal gear wheel is kinematically connected with the brake disk, and the ratchet wheel is located on the external gear wheel for engaging with a ratchet mounted on the press, while the driven shaft is connected to the brake disk by means of elastic elements, and the introduced into the brake are fixedly mounted on the central wheels emphasis on which elastic elements are fixed (AS USSR No. 643683, application No. 2338408 / 25-08 of 03.22.76, publ. 01/25/79, bull. No. 3 / A.V. Novikov, V.V. Kornilov, - / Crank brake /.

The disadvantage of this brake is the need to use two energy sources: electric energy of compressed air, 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 brake of the crank press containing the support, drive and pressure disks, the pressure disk drive and the cover, in accordance with the invention, the pressure disk drive is made in the form of modules, each of which contains a slider installed with the possibility of translational movement, end an electric motor with external and internal circular stators installed on the frame of a crank press with the possibility of magnetic contact with a disk rotor, whose shaft through a planetary gearbox and a mechanism torque azovaniya connected to the slide.

The invention is illustrated by drawings, where figure 1 shows the claimed brake, a side view partially in section, figure 2 shows the kinematic diagram of the module.

The brake of the crank press includes a drive shaft 1 with a drive disk 2, a support disk 3, a pressure disk 4, springs 5 with internal cylindrical guides 6, a cover 7 with modules 8 mounted on it with sliders 9, input shafts 10 and a disk rotor 11, which through the air gap are connected with the stators 12 mounted on the bracket 13. The slider 9 is mixed in the translational guides 14, has an internal thread 15, which through the rolling bodies - balls 16 interacts with the lead screw 17, which is mounted on the same shaft 18 with the tooth closed wheel 19 with internal gearing. A gear wheel 20 with internal gear is fixed inside the module case. The rotor 11 rotates the pinion gear 21 of the external gear, which is mounted on the same shaft in the bearing 10 with the rotor. Between the wheels 19 and 20 on the one hand and the wheel 21 on the other hand, several satellites are installed in the carrier 22. Each of the satellites is a gear block 23 of two gears that rotate on the shafts 24 in the bearings 25 of the carrier.

Thus, the torque conversion mechanisms are a screw-nut transmission, through planetary gears they are connected to the shafts of the electric motor rotors, and the rotors themselves are magnetically connected to the external and internal stators.

The brake works as follows: when a command arrives at the stators, fields of opposite directions are induced in them, for example, in the external - clockwise, in the internal - counterclockwise. As a result, the rotors 11 come into rotation, rotate the shaft 10, the gear 21, which drives the gear block 23, which sits on the shaft 24 of the carrier 25. As a result of the interaction of this block with gears 19 and 20, the shaft 18 comes into rotation together with the screw 17 a ball screw pair, which includes balls 16 and a nut 15 connected to a slider 9, which runs in the guides 14. As a result, the disk 4 presses the disk 3 against the disk 2, compressing the springs 5. The shaft 1 stops. Disinhibition occurs in the reverse order by recommuting stators 12.

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 area of the 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) the drive does not include belt drive, which also increases speed due to the combination with modularity and the minimum length of the kinematic chains;

4) since for turning on the brake and accelerating the driven parts in a short time, it is necessary much 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 turning on the stators, and this law can be continuous, rather than two-stage, which is usually used in pneumatic drives;

5) the possibility of introducing regulation of the working moment leads to a decrease in the dynamic moment in the shaft lines, which increases the reliability of the press as a whole.

Claims (1)

A crank press brake comprising a support, a drive and a pressure disk, a pressure disk drive and a cover, characterized in that the pressure disk drive is made in the form of modules, each of which contains a slider mounted for translational movement, an end motor with an external and internal circular stators type mounted on the frame of the crank press with the possibility of magnetic contact with a disk rotor, the shaft of which is connected through a planetary gearbox and a torque conversion mechanism with the slider.

Images