SU80110A1 - Friction progressive transmission - Google Patents

Description

Known friction progressive gears in which are coaxial. The driven and driven cone-shaped concave pulleys are driven around by transfer rollers, the pins of which sit in the cross-arms. Traverses, imitated in a frame, can rotate around their longitudinal oceii, while the frame is movable in its plane. The crossheads are arranged parallel to the plane of rotation of the rollers on their outer side so that the axes of the rollers intersect the axes of the pulleys. The change in gear ratio is carried out by turning; the axes of the rollers in the plane coinciding with the axis of the pulleys around the axes of the traverse.

The proposed transmission differs from the known ones in that the axles of the rollers are rigidly mounted on the cross-arms and the frame is made to swing around its central axis parallel to the axes of the cross-arms.

FIG. 1 shows a schematic sectional view; in fig. 2 - MM section; pas figs. 3-gear, front ji cry; on fng. 4-9-various traverse transfer arrangements.

The transmission consists of two coaxially cone-shaped concave pulleys of the drive 1 and the follower 2 and two transmission rollers 3 that roll on, secured with their pins 4 in the cross-arms 5. The cross-beams are mounted in frame 6 between the centers 7. The body 8 keeps the frame from wrap around the pulley axis. The distance from roller 3 to their axis is adjusted by nuts 9. Aligning the axes of the rollers with the plane of the axles of the pins is provided by turning the chains with 7 nuts 10. To evenly distribute the load on both rollers, the frame 6 is made stationary in its own plane in the direction of the arrows AAi. To this end, the Wamk is connected to the Cornus 8, swinging around the trunnions and earrings 12. To prevent one roller from touching one pulley to one pulley, and another roller to touch a pulley only one edge to another, the frame swings in the direction of the BBi arrows around pock 13, passage through its center of the orioorpdpkul ryo to the swing plane of the rollers.

No. 80110

The rollers 3 are interconnected by a locking device that provides the same angles of rotation of their axes. Automation of rotation can be accomplished by using a separate mechanism affecting the transmission or by making the transmission itself change the gear ratio depending on the load. In order to create a moment that turns the yoke 5 to change the gear ratio, the rollers 3 are installed in a position where their axes do not intersect the axis of the pulleys. To move the axis of the rollers, the yoke is made adjustable in the axial direction of the leverage of the system of levers 14 (Fig. 4) acting on the centers 7.

The angle of rotation of the traverse 5 may be limited to a predetermined value corresponding to the required gear ratio. For this purpose, the turning moment in the most predetermined position of the rollers 3 should be zero. To implement such an orientation and the axis of the traverse 5 (Fig. 5), iodine is positioned at an angle of 2 a to one another and at an angle a to the plane of the pins of the pulleys. The axis of the roller will swing in the plane of SH, intersecting the axis of rotation of the pulleys. When the centers are shifted along the axis of the crosshead,, this is indicated in FIG. 5 by a dotted line, the axis of the roller will not intersect the axles of the pulleys and the roller will change its position to those holes until its axis, which is located in the BiFi plane, does not intersect the axes of the pulleys; thereafter, the repositioning of the roller will stop. Consequently, the definite position of the rollers, that is, the determined gear ratio, will correspond to the definite position of the centers. The shape of a waveform for traverse 5, inclined to the plane of rotation of the pulleys at an angle, is shown in FIG. 6. The same result can be achieved if the swing axis of the traverse is left in a plane perpendicular to the axis of the pulleys, but centers 7 (Fig. 7) are threaded at the end and screwed into the crossbar. The displacement centers can be performed manually or with the help of any automatic device.

A simple addition can often cause the property to automatically change the gear ratio without a separate control mechanism. To do this, you can use the fact that when the gear is operated along the axis of the traverse, there is a force proportional to the sum of the torques acting on the drive and driven shafts. If spring 15 is placed under center 7 (phpg 8) of both or one crossbar, then depending on the torque generation on the driven shaft, the zeitr will compress the echo spring with a large or weaker force, and the rollers 3 will occupy a position depending on the position of this center. Such a transmission will automatically change the gear ratio in such a way that, at various points on the driven shaft, the moment of leading to the shaft will remain almost constant. For a more accurate characterization, the thread at the end of the center 7 can be replaced by a cam device 16 with a correspondingly constructed profile (FIG. 9), and the crossmember is provided with a roller 17. The adaptation does not shift the crosshead along the axis when the frame 6 is rotated. 8 and 9 is carried out by measuring the stiffness of the tension of the spring.

Subject invention

Claims (7)

1. Friction progressive and transmission, comprising coaxially leading and driven cone-shaped concave pulleys, driven by transfer rollers, which pins are mounted in traverses mounted on their longitudinal axes in the movement of its frame and located parallel to the rotation of the rollers and out of the frame. so that the axis of the rollers intersect the axis of the pulleys, and the rotation of the axes of the rollers in the plane coinciding with the axis of the pulleys -.- Ti-TO, l Vj..h V with -J7; -f-.4S.-5W1PЯ1 - flffT around the axes of the traverse, a change in the gear ratio is carried out, characterized in that the axles of the rollers are rigidly fixed on the traverse arms, and the frame in its plane is made of a frame swinging about its central axis parallel to the axis of the traverse. 2. The form of transmission in accordance with claim 1, characterized in that the frame is rotated on the collar, which is mounted in the transfer housing movably in a plane parallel to the plane of the frame. 3. The transmission form according to claim 1, characterized in that the yoke is axially adjustable and axially adjustable to allow the rollers to be installed in the x-axis, in which their axes do not intersect the axle of the I-1 axles, with the aim of forming the yoke turning to change the type of gear ratio. 4. Transfer by and. 3, so that, in order to limit the rotation of the crossheads to a predetermined value corresponding to a given gear ratio, by driving the rotating shaft to zero in the extreme predetermined position of the rollers, the small arms of the crosshead are iodine angled to each other and for iloskosti pulley rotation. 5. The shape of the transmission under item 3, which is based on the fact that for the axial permutation of the traverse, a device is used that automatically returns the traverse to the correct position and their axis and achieves the specified ratio. 6. The form of the transfer performance. 3 and 5, characterized in that the crossheads are mounted in a frame on the trunnions, of which at least one is connected to the corresponding crossbar by means of a screw cut. 7. Form of transmission of video for pi. 3 p 5, which is so that the traverses are mounted in the frame with the help of pins and are associated with the frame with the help of a cam device that moves the traverse along the axis when it is rotated. - 3 -L 80110 (JDU2. /  nf f srig.2 tea