SU35117A1 - Friction drive with continuously automatically changing gear ratio - Google Patents

Description

Friction drives with continuously automatically varying gear ratios are known, in particular used for automobiles and consisting of two cone-shaped disks with parallel axes of rotation, one of which has an axis that is oscillating relative to an axis parallel to it. In the proposed drive, the position of the swinging axis of one disk automatically changes relative to the axis of the other disk depending on the change in the number of revolutions and the transmitted torque.

In FIG. 1 shows a longitudinal section through the driving and driven parts of a friction drive; FIG. 2- front view; FIG. 3 shows a section along AB in FIG. I; FIG. 4 and 5, a device for manually controlling the drive.

, On the shaft a of the engine (Fig. 1 and 5) is mounted the leading part, made in the form of a cylindrical box 6, on which is attached a cover with a tapered part (a driving cone). This cover can slide along the box L parallel to its axis, and it is normal {it is pressed to it by springs d, clamped in sleeves rf, screwed to the rear, her wall of the box and fitted with piston rods d, screwed

(ZP). .

to the cone with. The sides / I of the CHa6meHbj box are in two or more grooves L, parallel to the box axis, each of which includes a leading tongue, fixed on the inner circumference of the lid with a pair of shank e projecting radially inwards: each pair has one of the spikes. it is supplied with the roller e-. A cylindrical ring / is mounted inside the box, the rear edge of which is supported, with a stop ball bearing /, the front edge has cutouts to form fists / - located near grooves I) and rollers with rollers, To the rear wall of box b on the g axis a regulator is fixed, consisting of loaded levers "with serrated segments g-, coupled with an arc rack ratchet f inside the annular frame."

The driven part of the friction drive is mounted on the fat i, which is located in the i KV bearings at the free end of the radial arm y, and the zalodny end of which is coupled with the propeller shaft L of the propeller that communicates the movement to the cart. The driven part is made in the form of a disk / g with an annular friction surface A, the taper of which corresponds to the taper of the front part from the cover from the leading part. The driven part may be provided with an intermediate cpp-unit / s carrying a friction ring on one side and coupled with the friction surface 1 on the other side. The radial arm y is controlled by a telescopic spring tube (fig. 2), which is placed between the ball joint / on the part I of the cart frame and the upper shelf / radial arm. The spring enclosed in the telescopic tube is compressed and tends to raise the radial arm and in order to withdraw Vedo. The part from its position coaxial with the drive shaft to the position shown in FIGS. 1 and 2. The radial arm is given a T-shape with an upper flange / and lower angle from which the latter is connected with a ball joint, for example, a thrust strap located approximately parallel to the propeller shaft L and in / one line with the drive shaft. The other end of the thrust rod “can be provided with a buffer spring” (FIG. 1) and a part attached by means of a ball joint, which receives the thrust pressure. A nut is used to adjust the initial compression of the buffer spring. When all parts of the drive are at rest or when the engine is running at a low speed, there is no real contact between the drive cone and the driven disk k; but as soon as the engine speed is brought to a predetermined amount, the controller rotates the annular frame / in the box b tl through fists / and the role of the KOD feeds the sliding cover forward so that the cone engages the ring surface / g of the house . When the axle is engaged, the force transmitted by the regulator to the cone c is transmitted to the friction surfaces, and the disk k comes into rotation as soon as this force gives a torque sufficient to overcome the resistance to movement. Then both parts rotate in the same direction but eccentrically one to the other and at different speeds, with the gear ratio proportional to the ratio of the lengths of the radii to the touch point. If the engine speed continues to increase, the regulator moves the sliding cover with further forward, as a result of which the driven part L mixes in the direction of the axis of the drive shaft, and the radial arm turns against the action of the spring tube ///, until both . the parts will not come to a coaxial position, in which the friction surfaces are pressed against each other along the entire circumference of the system to give a direct drive from the engine to the propeller shaft. The purpose of the buffer device is to limit the pressure between the drive cone and the slave disk, as well as to automatically lower this pressure as the transmission rises. Moving the disk k to a coaxial position allows the buffer spring to loosen its compression as the disk moves down the cone, so that the radial shoulder / has some movement along its spindle. If the engine speed for some reason decreases, the regulator allows the cone to move away from the driven part, and the radial arm / under the action of a spring in the tube τ will move the driven disk / g upwards to maintain the friction clutch, but with a lower gear ratio. - For independent adjustment by hand, a device is provided, consisting of a manual lever p attached to the rear end of the stop bar g (Fig. 4 and 5). The radial arm y rotating on the spindle y (Fig 4) is parallel to the shaft a. the motor can, however, move along this spindle. Hand lever /, with a view. the retention in the complete ENRII imparted to it is provided with a tooth / coupled with the toothed sector (/ Hp lever there is pressure to release the tooth p when the lever is required to be transferred. The same lever serves for disengagement independently of the accelerator, when it is necessary to give the rear a stroke using an additional gearbox of r. Pressing the latch g on the hand lever p includes a swinging part g mounted on the same axis.

that is, the lever /; so that, when the latter returns to its normal position, the intermediate spring part g expands, including the reversing gear, as soon as the teeth or cheeks of the engaging parts come into engagement position.

The subject of the patent

Claims (4)

1. A friction drive with continuously automatically varying gear ratio, in particular used for automobiles and consisting of two cone-shaped disks with parallel axes of rotation, the axis of one of which is made swinging relative to an axis parallel to it, characterized in that the position of the swinging axis / one the disk relative to the axis of the other disk automatically changes and depends on the change in the number of revolutions and the transmitted torque in such a way that the swinging disk moves, under the influence of it springs or other such fixture, and the other disc is moved in the axial direction under the action of centrifugal regulator Topa / - g. , 2. The form of transmission according to claim 1, characterized in that the rolling of the disk k is automatically adjusted and produced in such a way that the disk shaft sits on a lever swinging relative to the axis of the lever, connected to the telescopic lever / " ,; moreover, the transmitted torque acts on the levers t and /, increasing .or the lever lever 3. The form of the drive according to t: .n. 1.2, characterized in that for unloading the disk shaft k from the axial pressure arising between the disks, it is provided under the influence of the buffer spring / inserted into it (which can move; manual lever // and at this will move the rocker lever Y along its axis of swing, 4. The form of execution according to claim 3, characterized in that the hand lever /, is equipped with a device for securing it in a certain position after being replaced and a device for switching on a reverse gear, during which switching on both parts of the friction drive are held. mentioned lever: uncoupled.