SU1128010A1 - Slip coupling of friction type - Google Patents

Abstract

SAFETY FUNCTION-. The clutch NAL, containing the driven and coaxially driven half coupling, frik tpioHHo connected by means of a pressure disk, and the disconnection mechanism, made in the form of balls placed in the grooves located on the pressure disk and the driven coupling half, and the grooves on the driven coupling half made of variable depth, so that, in order to increase the response sensitivity and reduce wear of the rubbing parts, it is provided with a slider connected to the pressure disk by means of a torsion spring, the grooves in the pressure disk are made with the arc is arcuate in parts of constant depth located at an angle to one another, and the groove on the driven coupling half is located radially.

Description

The invention relates to mechanical engineering and can be used in all areas of the national economy to connect shafts and transmission elements and protect them from overheating. A known safety friction clutch, which has a driven half-coupling leading and coaxial with it, interacting concentrically located in the end cavity of the latter. Between the pressure spring-loaded disk and the freak1 A safety ring with finger holes pressed into the drive coupling half. The axial movement of the pressure disc is carried out using a force mechanism. The torque from the driving half coupling through fingers and elastic elements is transmitted to the friction ring, which, being pressed by the pressure disk to the coupling half, transmits the moment to it due to the forces of friction. When the clutch is overloaded, the clutch slips pj, - Since the clutch design does not allow the shafts to be automatically disconnected and joined during the operation. In addition, in the event of a slip, the wear of the mating parts increases, as this does not ensure complete separation of the coupling faces. Closest to the present invention is a friction safety clutch containing a master and coaxially driven slave coupling halves connected by a friction element and a pressure disc, as well as a shutdown mechanism made in the form of balls placed in grooves of variable depth at the ends drive and coupling half 2j. However, the balls create an axial force within a very short time, as a result of which, during prolonged overloads, repeated contacting of the rubbing surfaces will occur, and consequently, increased wear of the mating parts. The sensitivity of the known clutch to triggering is also insufficient. The purpose of the invention is to increase the response sensitivity and reduce wear of the rubbing parts. This goal is achieved by the fact that a safety friction clutch containing a drive coupling and a drive coupling coaxial with it, which is frictionally coupled by means of a pressure disc, and a shutdown mechanism, performed in the form of balls placed in the grooves located on the pressure drive and the drive coupling half, and the driven half coupling is made of variable depth, provided with a slide connected to the pressure disk by means of a torsion spring, the grooves in the pressure disk are made with two arcuate sections of constant depth, angled to one another, and the groove on the driven coupling half is located radially. FIG. 1 shows the proposed coupling, longitudinal section; in fig. 2, section A-A in FIG. 1, in FIG. 3 section bb in fig. one . The clutch contains a leading 1 and coaxially with her driven 2 coupling half. In the leading coupling half 1, fingers 3 are pressed in, on which elastic elements 4 are worn. In coupling coupling half 2, a friction ring 5 with internal and external conical friction surfaces is placed. In the holes of the friction ring 5, elastic elements 4 are installed, and inside it there is a pressure disk 6. The latter and the knowledge of the coupling half 2 are provided with grooves 7 and 8, respectively, in which the balls 9 are placed. The grooves 7 on the pressure disk are made with two arcuate portions of constant depth located at an angle to one another, i.e. the area of the radial direction is deflected under a blunt angle to the section of the concentric direction, or rather at an acute angle (for example, 20) to the groove 8, and the radial groove of variable depth on the driven coupling half 2. Slide 10 of the disengagement mechanism moves along the spitzs 11 of the driven half coupling 2 and is connected to the clamping disk 6 by a torsion spring 12 which is placed between the stop protrusion of the 13 slide 10 and the end wall 14 of the concentric groove 15 embedded in the pressure disk 6 itself. At the end of the leading coupling half 1 are pivotally mounted 16 centrifugal weights 17, the compression spring 18 spring-loaded. Centrifugal weights 17 provide for pressing the pressure disc 6 to the coupling half 2 by means of t9 pins and washers 20. The pins 19 are mounted in the coupling half 1 of parap3

axis of rotation, and the washer ZU on the bearing, on the end face of the pressure disc 6.

The clutch works as follows.

The torque from the leading half coupling 1 through the fingers 3 and the elastic elements 4 ne1) goes to the friction ring 5, which, being pressed by the pressure disk 6 to the coupling half 2, transmits the moment to it due to the occurrence of friction forces. The pressing of the pressure disc 6 to the power coupling 2 is provided by centrifugal weights 17, which transmit the force through the tongs 19 to the clamp 20.

When overloading the driven half-coupling 2, overcoming the friction forces, rotates relative to the friction ring 5 and the pressure disk 6, and the balls 9, rolling along an arc-shaped constant depth and radial variable depth, the grooves (grooves) 7 and 8 create an axial force unloading the friction ring 5 / and coupling half 2 from the pressure generated by centrifugal weights 17. The pressure disk 6 due to pressing with centrifugal weights 17 and the friction forces between it and ring 5 initially continues to rotate at the speed of the leading coupling half 1, squeezing A torsion wall 14 of the spring. 12 torsions located in the concentric groove 15. and resting against the thrust element 13 of the slide 10. After the torsion spring 12 is compressed, the pressure conical disk 6 moves to the left together with the slider 10 through the spitter joint 11, at 1280104

acquires the speed of the overloaded slave popumufta 2. At the same time, the balls 9, moving in the radial grooves of variable depth from the neutral 5 position to the axis of rotation of the coupling, ensure not only the sliding of the mating parts, but also completely remove the pressure conical disk 6 and frictions

10 ring 5, guaranteed image

the gap is at their rubbing surfaces, which reduces their wear.

Increasing the length of the path of movement of the balls 9 in the radial groove of variable depth in the driven half-dome e 2 and in the grooves 7 of arcuate constant depth in the pressure disk 6 reduces wear, softness and noiseless operation of the coupling during overload of a different cycle, both short and short and long periods, and at the same displacement of the coupons one relative to another (for example, -i 80) in this construction, the execution of grooves from two sections at an angle to one another increases the response sensitivity th coupling, and therefore increases the reliability of its work. The reliability of the coupling and the new, inserted unit in the shutdown mechanism - a slider with a torsion spring, which move the balls to their original position during reverse rotation of the slide and restore the frictional contact between the disk and the bucket: m (L half coupling), increases the reliability of the coupling.

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Claims (1)

SAFETY FUNCTION-. NAYA COUPLING, containing the leading and coaxial driven half-couplings, frictionally connected by means of a pressure plate, and a disconnecting mechanism made in the form of balls placed in grooves located on the pressure disk and driven half-coupling ', and the grooves on the driven half-coupling are made of variable depth, different the fact that; in order to increase the response sensitivity and reduce the wear of rubbing parts, it is equipped with a slider connected to the pressure plate by means of a torsion spring, the grooves in the pressure disk are made with two arcuate sections of constant depth located at an angle to one another, and the groove on the driven half-coupling is located radially. SU .... 1128010