SU149987A1 - Friction variator - Google Patents

Description

Fractional variators with conical working bodies and coaxially located input and output shafts are known. I.

The friction variator made according to the invention differs from the well-known original kinematic scheme and design, providing relatively small slip losses on the contact working surfaces of working bodies with a small specific load.

In the described -variator, the drive cone is made movable along the drive shaft and interacting with several parasitic tapered rollers, which set in motion the driven shaft of the driven shaft with the inner conical working surface. The axes of the parasitic rollers move in grooves perpendicular to the shafts. The necessary force to press the conical surface of the driven cone. To the parasitic rollers and the latter against the driving cone is provided by springs acting on the driven drum.

The drawing shows the described friction variator in section.

The variator consists of two bolted cups 1, and 2, which form the housing, the drive shaft 5, the driving cone 4, the parasitic tapered rollers 5 s about; from mi 6, the driven drum 7, the driven shaft S, springs 9, adjusting nuts 10, flange 11, screw pair 12, flywheel 13 and lock 14. Rotation from the drive shaft 3 is transmitted to the driving cone 4 mounted on its spline part via parasitic taper rollers 5 to the driven drum 7 connected by a flange // to the driven shaft 8. Compression of the working surfaces tel required for transfer kr t present moment is provided by springs 9. The clamping force can be adjusted

No. 149987-2 through the nuts 1 (). The change in the gear ratio is achieved by means of a flywheel 13 rotating a screw pair / 2, which moves the driving cone 4 along the axis of the driving shaft 3. At the same time, the parasitic tapered rollers are diluted or reduced. Axes 6 of the latter are not radially shaped - zh. cups. The latch 14 secures the flywheel 13 from spontaneous rotation.

While the parasitic taper rollers are in the closest position to the axis of the drive shaft, the gear ratio is greatest and the variator transmits the maximum torque. In this position, to prevent slippage, the tops of all three working cones must converge at one point.

Subject invention

Friction variator with conical working bodies and coaxially arranged input and output shafts, characterized in that, in order to ensure relatively small slip losses on the contact surfaces of working bodies at their low specific load, the leading cone for changing the gear ratio is movable along the drive shaft and interacting with several parasitic taper rollers that drive the B movement of the driven shaft, having an internal conical working surface and a spring pressed and parasitic rollers so that they are in moving the camping .napravlenii perpendicular to the shafts of the guide grooves, provide the required pressing force to the drive cone.

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