SU648760A1 - Start-stop clutch - Google Patents

Description

The invention relates to the field of mechanical engineering and can be used in machine tools, machines and devices for setting the working bodies of discrete movements.

A known start-stop clutch, which has a drive and a driven half coupling mounted on the driven shaft with face teeth and a ball-and-wedge preliminary tripping mechanism, which, when driven against the stop, drives the coupling half off the coupling. To completely remove the teeth from engaging and fixing the shaft, there is a full decoupling mechanism, made in the form of a disk sitting on the shaft, in the recess of which a roller of a spring-loaded lever, controlled by an electromagnet 1, falls.

A disadvantage of the known device is the low durability and complexity of the design.

Since the start-stop clutches operate in a dynamic dynamic mode, even minor wear of the disc notch and a change in the spring force of the lever lead to incomplete removal of the teeth from engagement. As a result, conditions are created for intense wear of the teeth, and the presence of a disc;

lever roller, springs and electromagnet complicate the design.

The aim of the invention is to increase the reliability and durability of the coupling.

This goal is achieved by the fact that the mechanism of complete decoupling is made in the form of a straight-through electromagnet mounted coaxially to the coupling halves on the driven shaft, while its ring bark is rigidly connected with the driven coupling half.

In addition, on the facing ends of the driven half coupling and electromagnet fine-molded teeth are made.

FIG. 1 of the drawing shows a start-stop coupling, a longitudinal section; in fig. 2 is a sectional view of FIG. one; in fig. 3 is a section BB of FIG. one; in fig. 4 - section bb of FIG. one; in fig. 5 is a cross-section of the FIG. one.

Claims (2)

The clutch consists of a leading half coupling 2 which is freely mounted on the driven shaft 1, on the end of which teeth 3 are made (Fig. 2), and a gear wheel 4 is cut on a cylindrical surface. The coupling half 5 is made in the form of a cup with similar teeth 3 on the end, mounted on the driven shaft on the key 6 with the possibility of sliding. The spring 7 1mmi1aet driven half coupling 5 to the leading coupling half 2. Ring 8 with a leash 9 is installed inside the driven coupling half 5 freely on the shaft 1. The leash 9 through the window 10 of the coupling 5 protrudes above its body. The axial displacement of the ring 8 is limited on the one hand by the bearing II bearing II, and on the other by the ball-and-wedge mechanism of pre-disengagement, made with two balls 12 arranged with a gap in the V-shaped radial heads 3, made on the ends of the ring 8 and driven half coupling 15. A control stop 15 and an electrically powered magnet 16 are stirred on the housing 14. The ring bore 17 of the electromagnet 16 is rigidly connected to the driven coupling half 5. The ring 8 is fixedly fixed to the inner end of the electromagnet 16 | whom do you want Analogous odeystvuyut with teeth arranged pas facing the end of the electromagnet 16 WEDO .moy coupling half 5. At the outer surface of the electromagnet 16 is adjustable stop 20 of a nonmagnetic material such as brass, configured as a nut. Start-stop clutch works as follows. In the concatenated. The driving gear 2 and the driven 5 half couplings are steeply pitchy. The motion is transmitted from the sprockets of the pinion gearing with the gear 4 to the gears, through the half coupling half 2.5 and key 6 to shaft i, from which the actuator receives movement, for example, lead screw of the machine tool. Due to the fact that the working element must be intermixed discretely, i.e., with stops, the start-stop clutch must be uncoupled, and the uncoupling moments are set by the machine control system acting on the control stop 15. At the required moment, the stop 15 extends, and a leash 9 runs over it. The rotation of the ring 8 stops, while the knowledge of the half-coupling 5 continues to rotate. The radial V-shaped grooves 13 at the end of the half-coupling 5 rotate (move) relative to the grooves 13 of the ring 8, as shown in FIG. 5 dotted line. Since the axial movement of the ring 8 is limited by the thrust bearing -I, the balls 12 squeeze the driven coupling half 5, compressing the spring 7 and withdrawing the teeth of the coupling half 2 and 5 from the engagement. The disengagement process continues as long as the driven coupling half 5 transmits the torque converted by the ball-to-line. mechanism (ball 12. V-shaped grooves 3) in the axial force, which, compressing the spring 7, displaces the driven coupling half 5. In the minment, when the leash 9 of the ring 8 contacts the stop 15, the electromagnet 16 turns on axial force applied to annular bore 17, rigidly connected with driven half coupling 5. This force ensures complete disengagement of coupling half 2 and 5 and a guaranteed gap between them. In the uncoupled state, the fine-molded teeth 19 of the half-coupling 5 are engaged with the teeth 19 of the ring 18, which ensures the angular fixation of the shaft and the accuracy of positioning the working member. If the disk measles 7 is in contact with its working end when the electromagnet 16 is turned on, then the phenomenon of "sticking" is possible that after the electromagnet 16 is turned off, the disk measles 17 remain in the attractive 1 m position. To prevent this phenomenon, a gap is provided between the core 17 and the electromagnet 16 in that the end of the adjustable stop 20 of the non-magnetic iV5AT is protruding relative to the end of the electromagnet 16 by the amount of the provided gap. When the working end of the stop -20 is worn, its axial position can be adjusted. Rotation of the stop 20. Claim 1. Start-stop clutch containing drive and driven coupling half-couplings mounted on the drive shaft. prior to disengaging and fully disengaging mechanisms, characterized in that, in order to increase the reliability of its operation and durability, the complete disengagement mechanism is designed as a linear electromagnet mounted coaxially to the coupling halves on the driven shaft, Its annular measles is rigidly connected with vedom.my semi.mufty. 2. A start-stop clutch according to claim i, characterized in that at the butt ends of the driven half coupling and the electromagnet facing each other, fine-modulated teeth are made. Sources of information taken into account in the examination I. Spiridonov A. A. and Fedorov-B. B. “Programming machine tools, M., 1972, p. 145-147. 9iii.i P 20 yug.5 w / 35G-g faz.S