SU447532A1 - Safety ball coupling - Google Patents

Description

(54) SAFETY BALL COUPLING

I

This invention relates to a general machine. construction and instrument making and is intended for use in drive mechanisms.

Known safety ball coupling, containing a leading coupling half and a driven coupling half, having radial sockets with spring-loaded balls mounted in them, pressed against the grooves made on the inner surface of the driving coupling half. However, this clutch under overloads softens and closes the kinematic chain in one revolution several times (according to the number of balls). The opening process proceeds abruptly and is accompanied by wear of the contacting parts, sharp load fluctuations in the drive and intense noise.

In order to provide a shock-free shutdown with full opening of the kinematic chain without re-switching on for one revolution, the clutch is equipped with a holder mounted axially spring-loaded in the leading half of the clutch on the splines.

space and having on the inner surface of the recess under the balls and the cylindrical juice, interacting with the balls when the clutch operates. In addition, in order to return the cage to the working position after removing the overload, a cutting ring is installed on the driven coupling half.

FIG. 1 shows a longitudinal section of the coupling; in fig. 2 is a section along A-A in FIG. one; in fig. 3 shows the location of the coupling parts at the time of its three overloads.

The coupling consists of a leading coupling half 1 and a driven coupling half 2, interconnected by balls 3, which rest on compression springs 4 located in the radial slots of coupling half 2 and the pressing balls against the grooves of the holder 5 installed with the possibility of axial movement on the slots in the bore | coupling halves 1. The yoke is provided with a sleeve 6 with a cylindrical inner bore made flush with the inner surface of the yoke. The sleeve 6 is fixed to the yoke with screws 7 and is under the action of the helper.

The compression springs 8, the force of which is adjusted by screws 9, Axial movement of the cage with sleeve is limited in one direction by the end washer 10 fixed on the coupling half 2 screws 11, and in the other by the coupling half shoulder 2. In the opening of the cover 12 fixed on the thinking 1 screws 13 The discharge ring 14 passes through the seal 15, which holds the lubricant charge in the working cavity of the coupling. The groove 5 with the grooves and the sleeve b with the cylindrical bore together with the screws 7 form an assembly unit that can be made as one piece

When the torque is not exceeding the permissible value, the balls 3, located in the radial nests of the coupling 2 and pressed by the supports 4 to the notches in the holder 5 of the coupling half 1, transfer the torque between the coupling half. Kc) when the torque of the transmitted torque exceeds the limiting one, the balls 3 under the action of the radial component of the normal pressure from the recess of the sleeve 5 overcome the resistance of the springs 4, lower into the radial socket of the floor of the coupling 2 and roll out of the recesses onto the cylindrical the inner surface of the sleeve 5, which is made flush with qi; the inner internal bore of the sleeve 6. Under the action of the auxiliary compression springs 8, the sleeve 5 together with the sleeve 6 at the splines moves along the coupling axis up to the stop in the coupling half coupling 2, This position is shown in FIG. 3. In this case, the shirks 3 are transferred to the cylindrical surface of the bore in the sleeve b and freely roll over it without falling into the grooves of the holder 5. The transfer of the torque between the half-shells 1 and 2 stops. After the clutch is activated, the sleeve 5 is moved together with the sleeve b to move the clutch ...

the cutting ring 14 in the opposite direction against the stop in the face washer 10. The balls 3 fall into the recesses of the holder 5 and the torque transmission between the coupling halves 1 and 2 is resumed. The force of the auxiliary compression springs 8 is set so that it is sufficient to overcome the forces of the resistors to axial movement of the sleeve 5 with the sleeve, b when overloaded, when the balls 3 roll over the cylindrical surface of the sleeve 5, and then the sleeve b. At the same time, this force should not cause axial movement of the latter during operation of muffler without overload, when the balls 3 are pressed by the force of the springs 4 to the notch of the holder 5.

 Subject invention

Claims (2)

1. Safety ball clutch containing a leading coupling half in the form of a glass and installed in it a driven coupling half, having radial slots for spring-loaded balls, characterized in that, in order to provide an unstressed deactivation with full opening of the kinematic chain without repeated switching on in one turn, eliminating noise and raises over: vknosti, it is equipped with a holder mounted inside the leading coupling half on the slots, spring loaded in the axial direction, mounted with the possibility of axial movement and having morning under surface recesses balls and cylindrical rib cooperating with the balls when the coupling is activated. 2. The coupling according to claim 1, in connection with the fact that, in order to return the cage to the working position after the overload has been removed, a cutting ring is installed on the driven coupling half. 3 8 6 P one Fig.Z