SU69503A1 - Stepless Reversible Friction Gear - Google Patents

Description

Known continuously variable reversible friction gears with a shaft, at the end of which a ball segment mounted on an articulated device, leading a friction flat disk mounted on the second shaft, have a number of disadvantages associated with the presence of a universal joint.

A distinctive feature of the proposed continuously variable reversible friction gear is that the ball segment is mounted on a shaft, pivot about an axis perpendicular to it and mated by means of a bevel gear with a driven or driving shaft.

The shaft bearing the ball segment is mounted in a bearing that is rotatably fixed around an axis perpendicular to the axis of the shaft.

FIG. 1 shows a longitudinal section of the proposed transmission, and FIG. 2, 3 and 4 are the different positions occupied by the friction transmission pair.

The proposed reverse friction gear is intended to change the speed of rotation of the driven shaft at a constant speed of rotation of the drive shaft and for

changing the direction of rotation of the driven shaft at a constant direction of rotation of the drive shaft.

In the crankcase housing 72 of the proposed friction gear there are two main assemblies: a gear with conical gear and a friction pair.

A toothed gear consists of three conical shtiches 1,2 and J, of which 7 is planted on a key at the end of the leading shaft 4, and 2 is planted on an axis 5 perpendicular to the drive shaft 4. Vertical axis 5 above the ground The gear 2 is mounted on it and has a sleeve in which the shaft 6 freely rotates, which bears the gear gear 3 mounted on the key. All three gears are engaged, whereby the rotation of the drive shaft 4 with the gear 7 causes the rotation of the gear 2, which in turn causes the rotation of the gear 3; while the gear 3 together with the supporting shaft 6 will have a rotation opposite to the rotation of the drive shaft 4.

The lower end of axis 5 represents

357

a n on which it can rotate freely, and the shaft (5, which carries the bristle 3 on itself) will rotate at the same time.

Thus, the shaft 4 is able to transmit the rotational movement to the cantilever shaft b while being in any position shown in FIG. 2, 3 and 4, or B are intermediate positions between them.

At the end of the cantilever shaft 6, the driving element of the friction pair, made in the form of a spherical segment 7, is seated on the key. Therefore, the segment 7 can also receive rotational movement from the driving shaft 4, being in any position shown in FIG. 2, 3 and 4, or intermediate position.

The second element of the friction pair is a disk 8, mounted on a prismatic key at the end of the driven shaft 9, in which it can freely move in the axial direction within certain limits.

The contact of the disk 8 with the spherical segment 7 is carried out through a special nozzle of friction material in the form of a circular ring W, the plane of contact of which with the spherical segment 7 is machined along the radius of the latter.

The required force of pressing the disc 8 on the ball segment 7 is achieved by means of a special device 77.

The principle of the proposed friction reversing gear is shown in FIG. 2, 3 and 4.

While the friction pair is in the position shown in FIG. 3, the driven shaft 9 does not receive rotation, since the bead segment 7 contacts the ring 10 at its apex, where its linear velocity is zero, and as a result, the segment, rotating itself, does not transmit the rotation to disk 8. To protect the ring 10 from unnecessary wear during pe358 operation

In this position, as well as to facilitate the transfer to the working position from the idling position considered above, the top of the ball segment 7 has a ball bearing 13.

When translating the ball segment 7 from the position shown in FIG. 3 to the position shown in FIG. 2, the driven disc 8 and, together with it, the driven shaft 9 will receive rotation opposite to the rotation of the driving shaft 4. Herewith, as the ball segment 7 moves from the one shown in FIG. 3 of the neutral position to the maximum possible position (Fig. 2), the rotational speed of the driven disc 8 will increase due to an increase in the peripheral speed at the sections of the spherical segment 7 that are gradually brought into contact with the ring 10, more and more distant from its top.

When translating the ball segment 7 from the position indicated in FIG. 3 to the position shown in FIG. 4, the driven disks 8 and the shaft 9 will receive rotation in the direction coinciding with the rotation of wheel 4. At the same time, as the ball segment is moved to the maximum possible left position, the speed of rotation of the driven parts 8 and shaft 9 will also increase for the above reason.

Thus, the change in the direction and speed of rotation of the followers is carried out by changing the angle of inclination of the ball segment from the neutral position by a certain amount in one direction or another.

Subject invention

1. A stepless reversible friction transmission, comprising a spherical segment that interacts with a disk in friction, characterized in that the spherical segment is mounted on a shaft, rotatable near an axis perpendicular to it, and coupled to a driven or driving shaft through a bevel gear. 2. The form of transmission in accordance with claim 1, characterized in that the shaft b, bearing the ball segment 7, is mounted in a bearing that is rotatably mounted around an axis perpendicular to the axis of the shaft b.

Claims (2)

1. A stepless reversible friction gear, comprising a ball segment that interacts frictionally with a disk, characterized in that the ball is mounted on a shaft, rotatable near an axis perpendicular to it, and connected by means of a bevel gear with a driven or driving shaft. 2. The form for carrying out the transmission according to claim D is characterized in that the shaft 6 carrying the ball segment 7, FIG. 1 is mounted in a bearing, rotatably fixed around an axis perpendicular to the axis of the shaft 6, FIG. 2 FIG. 3 Z7S