SU51052A1 - Variable transmission mechanism - Google Patents

Description

The invention relates to the type of variable gears in which a rod is used as an intermediate element, the middle part of which is associated with a certain inertial mass, and the ends are articulated with the discs at some distance from their centers, and the disks are seated on the drive and driven shafts, located on the same geometric axis. When the rod rotates, the inertial mass moves along a certain trajectory and at the same time is a kind of elastic support for the rod.

In the absence of a load on the shaft, the inertial mass, due to the centrifugal force that arises as it moves along the path, tends to equalize the numerical revolutions of the driving and driven shafts. When a load is applied to the driven shaft, the inertial mass, due to the same centrifugal force, overcomes this load and maintains the speed of the driven hall in accordance with the value of the load given to it.

In FIG. 1 schematically shows the variable transmission mechanism; FIG. 2, 3 and 4 diagrams that explain the operation of the mechanism; figs 5 and 6

embodiments of the variable transmission mechanism.

The variable transmission mechanism consists of two disks / and 2 (Fig. 1), mounted on the drive and driven shafts, arranged in a straight line. The disks 1 to 2 are articulated between themselves by the rod 3, which at some distance from the centers of their hinge on the disk 2 and sliding, allowing for the reciprocating movement of the rod along its axis, on the disk /. The rod 3 in its middle part carries the inertial mass fixed on it 4.

The principle of operation of the mechanism is that if the end A of rod 3 (fig. 2) is given a rotational motion, then the mass, due to inertia, will tend to maintain a state of rest, thereby creating an elastic support for the rod. The sweep will be transmitted to the end of the rod, which will begin to rotate in the same direction. If we now join the end A of the string with the disk /, and the end of B with the disk 2, as indicated above, we will have the scheme of the mechanism shown in FIG. one.

When the load on the driven shaft is equal to zero, the disk 2 will begin to rotate,

increasing the number of revolutions until it is comparable with the revolutions of the drive disk /. Then the motion will be steady, and the kinematic scheme will take the form shown in FIG. 3. Under the influence of the centrifugal forces, the trajectories described by the inertial mass will turn into a circle of the maximum possible radius lying in a plane perpendicular to the axis of the shafts. If the load on the driven shaft is infinitely large, then disk 2 will stop. The movement will follow the pattern shown in FIG. 4. In this case, the trajectory of the inertial mass will be an ellipse lying in a plane inclined to the geometric axis of the shafts. Due to this, inertial forces arise that create a torque of maximum magnitude on the driven disk 2. Thus, the occurrence of a load on the driven shaft causes a decrease in the number of revolutions of this shaft until the load decreases.

The transition from one state to another through a series of intermediate positions occurs smoothly and continuously, so that the driven shaft can rotate at any number of revolutions.

FIG. 5 shows a diagram of a modified mechanism in which two inertial masses 4 are applied, swinging on the shoulders near the fixed supports. Sleeve 5, loosely mounted on the core part of the rod 3, is articulated with masses 4 using earrings 6, pivotally connected to one

the sides with the sleeve 5, and on the other, with the swinging arms, on which the masses 4 are suspended.

In this case, the ball joint in disk 2 is replaced by a sliding joint.

Another diagram of the modified mechanism shown in FIG. 6, eliminates the use of gliding hinges to reduce friction. In this case, the coupling of the rod 3 with the discs 7 and 2 is made with the help of ball joints placed on the cranks 7, turning on the discs / and 2.

The subject matter of the invention.

Claims (3)

1. The variable transmission mechanism, characterized in that the mating of coaxially located driving and driven arbors is carried out using a rod with an inertial mass, jointly articulated at its ends with both shafts at some distance from their common geometrical axis and which can perform backward along its axis a swiveling movement at the hinge of at least one of its ends. 2. The form of the mechanism according to claim 1, characterized in that the inertia mass 4 is located directly on the rod 5. 3. The form of the mechanism according to claim 1, characterized in that the inertial masses 4 are located on the shoulders swinging around the fixed supports and jointly articulated with the help of earrings 6 with the sleeve 5 pivotally mounted on the middle part of the rod 5. fig 1 FIG. S FIG. four f and d. 6 -four