RU2195588C2 - Jaw clutch - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: invention is designed for connecting shafts in mechanical system where no relative slipping is tolerable. Said jaw clutch has driving clutch member movable in axial direction with spring-loaded jaws and steps for rods of pilots, and driven clutch member with end face jaws and engagement mechanism. Engagement mechanism is made in form of pilots with spring-loaded rods coupled by torsional spring and key movable in axial direction and engaging with pilots, engagement jaws interacting with projections of movable key and bushing engaging by its bevels with driven clutch member. Novelty is that driving clutch member is provided with safety devices made in stops and engaging with spring-loaded rods of pilots at rotation of clutch. Bushing of engagement mechanism is provided with cams which can also engage with said rods. EFFECT: improved reliability of operation of locking elements of driving and driven clutch members. 7 dwg

Description

 The invention relates to mechanical engineering and can be used to connect shafts in a kinematic chain.

 Known cam clutch for ed. St. N 618586, comprising an axially movable leading coupling half, a driven coupling half and mounted on the latter switching mechanism made in the form of two catchers with spring-loaded rods connected by a torsion spring movable in the axial direction of the dowel, while the leading coupling half is made with grooves for accommodating catcher rods and ensuring mutual fixation of the coupling halves.

 However, this coupling did not find application, as fixing elements of the leading and driven coupling halves do not have selectivity, as a result of which, at the time of fixing the coupling halves, there is the possibility of incomplete contact of the working surfaces of the stops and spring-loaded rods and, therefore, their increased wear.

 The aim of this invention is to ensure the reliability of the locking elements of the leading and driven coupling halves.

 This goal is achieved by the fact that the stops mounted on the leading coupling half are made with fuses, on which bevels are provided, and the spring-loaded rods interact with the cams made on the sleeve sitting on the driven coupling half.

 In FIG. 1 shows a cam coupling in longitudinal section; in FIG. 2 - section A - A of figure 1; figure 3 - stops with fuses deployed in a plane; in FIG. 4 - section B - B, passing through point G of figure 3; in FIG. 5 - stops with fuses; figure 6 - stops with fuses, deployed in a plane; Fig.7 - the position of the point G on the rod 5.

 The cam coupling consists of a follower 1 and a drive coupling half. The coupling half 1 carries a switching mechanism, comprising a sleeve 2, two catchers 3 and 4 with rods 5, springs 6 and pushers 7, a torsion spring 8, at the ends of which catchers are fixed, a spring 9, two cams 10 and 11, a movable key 12 .

 The leading coupling half 13 has stops 14 with fuses and spring-loaded cams 15.

 The coupling operates as follows. The leading coupling half flows forward (the control of the coupling can be either manual or automatic) until it contacts the surface B of the switching mechanism. Under the action of friction forces, the inclusion cams 10 and 11 are rotated and, abutting against the protrusion of the movable key 12, move it to its extreme working position. In this case, one of the catchers is turned on. The included catcher 3 or 4 (reverse rotation) under the action of the spring 8 starts to rotate. When the rotation of the catcher 3 or 4, the cams made on the sleeve 2, through the pushers 7 and the springs 6 act on the rods 5 and bring them into working position. The fuse, made on the stop 14 of the driving coupling half, snatches only the spring-loaded rod, which managed to reach the working position when equalizing the angular velocities, that is, it reached a level not lower than point D of FIG. 4. The rods that did not manage to reach the working position, that is, below the level of point G, the fuse returns to its original position. Next, the spring-loaded rod under the action of a untwisted (twisted) spring 8, pressing the fuse, abuts against the stop 14 - fixing occurs. Further rotation of the fixed coupling halves, with extreme untwisting (twisting), leads to the rotation of the sleeve 2, which, interacting with its bevels with the driven coupling half 1, squeezes the spring 9 and engages this coupling coupling with the leading coupling half. In this case, each end cam of the coupling half 1, pressing the spring-loaded cam 15 of the coupling half 13, enters the cavity of the latter, and the spring-loaded cams 15 enter the cavities of the driven coupling half and lock it. At the same time, when turning the sleeve 2 relative to the driven half-coupling 1, the cams of the half-coupling 1 act between the bevels of which there is a second protrusion of the key 12 and move it to the middle idle position, in which both catchers sit on the key 12. The first protrusion of the key 12 occupies the position between bevels including cams 10 and 11.

 To disconnect the coupling, the drive coupling half is retracted to its original position. The driven coupling half 1 when disengaged by the action of the spring 9 also moves to its original position.

Claims (1)

 A cam coupling containing an axially movable leading coupling half with spring-loaded cams and stops for catcher rods and a driven coupling half with end cams and a switching mechanism made in the form of torsion spring-coupled catchers with spring-loaded rods, axially movable and interacting with the catcher keys, including cams interacting with the protrusions of the movable key, moving it to the working or neutral position, as well as the sleeve interacting with its themselves with the driven half coupling, characterized in that the driving coupling half is provided with a fuse provided on the stops and interacting with the rotating coupling with spring rods catchers and the closing mechanism of the sleeve is provided with cams also having the possibility of interaction with said rods.

Images