SU1428867A1 - Safety clutch - Google Patents

Abstract

The invention relates to the field of mechanical engineering, in particular, to devices for transmitting a torque of limited magnitude. The purpose is to increase operational performance by ensuring reliable coupling operation in a safety mode and ensuring an increase in load capacity. The clutch contains a drive shaft 1, on which the ynfjyroe screw rib 2 is fixed by its middle part. The end sections of the rib can move along the axis of the clutch. The screw rib 2 is placed inside the driven half coupling 4, the space between the drive shaft 1 and the inner surface of the driven coupling half is filled with loose working mixture. In case of overload, the distance between the turns of the rib 2 is changed. The force effect of the working mixture on the driven coupling half changes. The drive shaft § slips relative to the driven coupling half. 1 il. (L iO

Description

The invention relates to mechanical engineering and can be used to protect the drives of machines from overloads,

The purpose of the invention is to improve performance by ensuring reliable operation of the centrifugal clutch in a safety mode and ensuring an increase in the load capacity of the centrifugal clutch.

The drawing shows the proposed Yufta.

. The clutch consists of a drive shaft 1, which is equipped with an elastic screw edge 2. The edge 2 is mounted on the shaft so that it can move along the shaft, thereby providing axial compression and twisting of the rib, but the edge 2 in its middle part (inner edge of the half-turn) rigidly connected to the shaft 1, for example, by welding.

Such an embodiment of the connection of the screw rib with the shaft provides a rigid connection of the blades (screw) necessary for this type of centrifugal clutches and at the same time ensures the mobility of the screw end sections along the shaft ,, The drive shaft 1 is in contact with the driven half coupling through the support ball 3 4, rigidly mounted on the driven shaft 5. The driven coupling half 4 is a cylinder, in the cavity of which a helical rib is placed. With the help of bolts 6 through the adjusting gasket 7, the flange 8 of the driven coupling half is attached to the cylinder of this coupling half. Through the support balls 9, the drive shaft 1 contacts the flange 8, thereby limiting the longitudinal displacement of the shaft 1 relative to the coupling half 4. In order to reduce friction losses, the shaft 1 contacts the coupling half 4 through anti-friction ring rings 10 ° Internal cavity driven between the coupling half 4 and the shaft 1 is filled with working dry mixture 11, for example, with steel balls or steel wire crumb mixed with graphite.

Muft.a works as follows

When the drive shaft 1 rotates, the screw rib 2 transports the working loose mixture 11 to the inner end of the driven coupling half 4. As the working mixture 11 compresses and increases in the amount of its effect on the driven coupling half 4, the output shaft begins to rotate. When an overload occurs, the driven shaft 5 stops and stops and driven half coupling 4, and the drive shaft 1 continues to rotate. In this case, the helical elastic edge 2 receives axial compression, thereby reducing the magnitude of the force effect of the mixture 11 on the driven coupling half 4, Ta Kim way, there is a slip of the drive shaft 1 relative to the driven coupling half 4,

When the leading mixture in la 1 11 is reversed by means of a screw rib, it is transported to the inner end of the flange 8 and the coupling is further developed in a similar way.

Claims (1)

Compared with similar centrifugal couplings, this design of the coupling has an increased load capacity and stability of the transmitted moment, which is achieved due to compaction of the working bulk mixture with a continuous screw rib. In normal operation, this mixture is a homogeneous dense transmission link, which becomes a loose state at the occurrence of loads Dp of this design of the coupling is characterized by the simplicity of its execution and manufacturability. Formula invented 1 A safety coupling containing a leading coupling half in the form of a shaft equipped with blades, a driven coupling half in the form of a cylindrical body filled with a loose working mixture, characterized in that, in order to increase operational capabilities, the blades of the leading coupling half are made in the form of a continuous elastic helical rib freely placed - on the shaft, and in its middle part with the inner edge connected to it. VNIIPI Order 5106/33 Circulation 784 Random polygons pr-tie, Uzhgorod, st. Project, 4 Subscription