SU1448145A1 - Centrifugal clutch - Google Patents

Abstract

The invention relates to mechanical engineering, namely to couplings transmitting rotation at different speeds. The aim of the invention is to increase the load capacity and uniformity of rotation of the driven shaft. The clutch contains a drive shaft 1 connected to the planet carrier 3, on which the satellites (C) 4 in the form of gear wheels are mounted. C 4 is engaged with a central wheel 5 fixed on the driven shaft. C 4 is covered with a toothed belt 6 with weights (D) 9. When the drive shaft rotates and the stationary driven in connection with the load C 4 applied to it, the wheel 5 will roll in, driving the belt 6 to D 9. and move in the radial direction. This changes their moment of momentum. This results in stopping at a certain rotational speed of the belt and C 4 and transferring the rotation from the carrier to the central wheel and the driven shaft. Since the magnitude of the moment of momentum of motion depends on the radius of the position of G, the large difference in the radii of position of G in the coupling increases its load capacity. The implementation of a coupling with several belts with G displaced relative to each other in the circumferential direction increases the smoothness of the rotation of the drive shaft. 1 hp f-ly, 2 ill. (L

Description

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The invention relates to mechanical engineering, namely to devices transmitting rotational motion from the driving member to the driven member with the possibility of rotating the links at different speeds.

The aim of the invention is to increase the load capacity and uniformity of rotation of the driven shaft.

FIG. 1 shows the coupling, general view; in fig. 2 is a view of D in FIG. one.

With a constant angular velocity from the rotation of the drive link (i.e., the drive shaft with carrier and satellites), its linear velocity V depends on the distance / on the axis of rotation of the TOE in the ratio Y (o. Consequently, as the load moves away from the axis of rotation, formulas of the angular momentum of / and V, i.e., the change in L is in direct dependence on the change with and quadratic

The centrifugal clutch contains the leading dependence on the change R.

1 and driven 2 shafts, located on the same line OO. To the drive shaft there are fastened: drove 3 satellites 4 in the form of gear wheels meshed with the central wheel 5 located on the driven shaft. The diameters of the satellites greater than 5 is the centrifugal force created by the meter of the central wheel. The satellites are covered only by the power of the engine and are driven by the flexible closed element 6 of the main link. The follower link is an extension of a toothed belt having depressions 7 and protrusions 8 for engaging satellites with the teeth (Fig. 2). With load-bearing element, 2o power. However, in the areas, two inertial loads 9, by the length of the loads, are closer to the axis of the TO (B-B and G-A) decrease from each other, equal to half the length of the bearing element.

To eliminate the pulsating nature of the transmission of torque in the clutch, there may be several toothed belts, 5

Any change in the moment of momentum of the inertial loads of the coupling is possible only under the condition that an external force is applied to them. In the areas of cargo removal from the axis of the OO (А-В and В-Г) by this force

moment of momentum cannot, because it does not transmit, but consumes

The development of their moment of momentum occurs only through interaction with the driven link. Consequently, in sections A-B and B-D, the goods interact with the leading link and, in principle, may not show which are shifted relative to each other in the circumferential direction evenly so that they cross the BG axis of the satellite axes at regular intervals.

The clutch works as follows. When the drive shaft 1 rotates and the stationary driven central wheel 5 rotates, in connection with the load applied to it from the output shaft 2, the carrier 3 rotates with the satellite 4 around the axis line OO. In this case, the satellites run around the driven central wheel and rotate in the direction of rotation of the carrier, engaging the belt 6 with weights in circular motion. The cargo makes a double movement — rotation around the center line of the OO together with the driving link and moving in the radial direction along with the belt consistently the position of A, B, C, D, etc.

The shortest distance Ri from the axis of the OO cargo is in positions A and B.

The maximum distance 2 from the axis of the load is in positions B and G.

The moment of the amount of movement is expressed by the formula

,

where R is the distance of the load from the axis of the OO;

m is the mass of the load;

V is the linear velocity of the load in the reference system associated with the axial line of the OO coupling.

With a constant angular velocity from the rotation of the drive link (i.e., the drive shaft with carrier and satellites), its linear velocity V depends on the distance / on the axis of rotation of the TOE in the ratio Y (o. Consequently, as the load moves away from the axis of rotation, formulas of the angular momentum of / and V, i.e., the change in L is in direct dependence on the change with and quadratic

depending on the change in R.

is the centrifugal force generated only by the engine power and any change in the moment of the momentum of the inertial loads of the coupling is possible only under the influence of an external force on them. In the areas of cargo removal from the axis of the OO (А-В and В-Г) by this force

power. However, in the areas of cargo approximation to the axis of OO (B-B and G-A), it cannot reduce the moment of the amount of movement, since it does not transmit

The development of their moment of momentum occurs only through interaction with the driven link. Consequently, in sections AB and B-G, the goods interact with the driving link and, in principle, may not affect the driven link. In areas B-B and G-A, inertial loads approach the axis of rotation of the TOE against the direction of action of the centrifugal forces only when interacting with the driven link. This causes the transfer to the slave element of a constant torque in the direction, the magnitude of which is in quadratic dependence on the difference between the maximum (Rz or O-B and O-D) and the minimum one (/ or O-A and O-B) distances from the axis of rotation.

In the proposed coupling, the difference has a large value but compared with the known coupling, which increases the load capacity of the proposed device.

If the clutch is equipped with several belts, the loads on which are shifted relative to each other, the pulsed nature of the transmission of torque is eliminated.

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Claims (2)

1. A centrifugal clutch containing a driven half coupling in the form of a central wheel and leading in the form of a carrier with satellites mounted on it covered by a flexible link and centrifugal weights, characterized in that, in order to increase the load capacity, the satellites and the central wheel are made teeth and engagement with each other, flexible connection is made in the form of a toothed belt, and centrifugal weights are fixed on its outer surface. 2. The coupling according to claim I, characterized in that, in order to increase the uniformity of rotation driven shaft, it is equipped with at least two additional satellites, an additional central wheel engaging with them and a belt covering them with loads attached to it, while the weights on the additional belt are displaced in the circumferential direction relative to the loads on the main belt. 2.