SU1325220A1 - Safety clutch with automatic cut-off and cut-in - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to protect actuators from overloads. The purpose of the invention is to increase the load capacity. Half coupling (P) 1 and 6 are connected by balls 3, located in the slots of driven P 1, and additional, spring-loaded balls 8 and 4, located respectively in channels 7, leading P 6. When the coupling is activated, the balls 4 come out of engagement with balls 3 and recessed in channels 5, pushing through channel 7 balls 8, which are pinned fingers 9. When the rotation speed decreases P 6, centrifugal pads under the action of springs 16 lead balls 8, 4 to the initial position, short P 1 and 6. 1 z.p. . f-ly, 2 ill. / 8 th 2 (L sob ate b o 13 FIG.

Description

The invention relates to mechanical engineering and can be used in drive mechanisms to protect them from overload.

The purpose of the invention is to increase the load capacity.

FIG. 1 shows the clutch in the initial position; in fig. 2 shows section A-A in FIG. 1. The coupling consists of the driven half coupling 1, freely mounted on the hub 2.

The 8-face surface of the driven half-coupling 1 in the slots is fixedly mounted balls 3, which are engaged with the balls 4 located in the axial channels 5 leading, to her coupling half 6. In the radial channels

7Vedush, she set the coupling half 6 balls 8 fingers 9, which with the help of the elements 10 are in contact with the petal pru ruh 11. The petal spring 11 through the sleeve 12 is preloaded nut 13. In the extended part of the radial channels 7 are installed cylindrical pads 14 with an annular groove 15. The pads 14 are preloaded with springs 16, the amount of compression of which is adjusted by screws 17. Glasses 18 are welded to the end surface of the leading coupling half 6, in which clamps 19 are mounted, preloaded by springs 20, the amount of deformation of which is adjusted by screws 21.

The clutch works as follows.

In the moment transfer mode, both coupling halves synchronously insert, the balls 3 and 4 are engaged, and the pads 14 under the action of centrifugal force move to the extreme radial position (in Fig. 1 it is shown with a dashed line).

When overloaded, the stopper is aware of the half coupling 1 and the balls 3. The hub 2 and the leading coupling half 6 continue to rotate. In this case, the balls 4 are pressed into the axial channels 5, and the balls 8 into the radial channels 7. Moving the balls 8 in the radial direction leads to the pressing of the fingers

9i deformation of the springs II. Since the end part of the fingers 9 is flat and inclined at an angle to the axis of the balls, the balls

8 are radially clamped and stop. Upon further rotation of the master coupling half b, contact with the slave 1 is not carried out.

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five

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five

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five

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five

When the drive is turned off, the centrifugal force acting on the pads is reduced and when the condition is met, ftp d + Rep, where Pnf is the force of the spring 16;

Rc - centrifugal force, acting

on pads 14;

Kc is a pressure release of clamp 19 and is directed towards the action of centrifugal force; a shot (returning to the initial position by clicking) of the pads 14 occurs. The pad 14, hitting the balls 8, pulling them out of the locked state, thereby moving radially down to the axis of rotation. This leads to the axial movement of the balls 4 and the new clutch coupling.

The introduction of additional balls, their location in the channels of the leading coupling half, as well as the implementation of the switching mechanism and its interaction with the balls, ensures an increased load capacity of the coupling, stability of the transmitted torque, reliability of switching off and switching on the drive.

Claims (2)

1. Safety clutch with automatic switching off and on, containing coaxially arranged drive and driven coupling halves connected by a ball, mounted in the slots of the driven coupling half and preloaded by an elastic link mounted on the driving half coupling, characterized in that, in order to increase the load capacity it is equipped with additional balls, axial and radial channels communicated with them are made in the master half coupling, the means of automatic switching is made in the form of spring-loaded centrifugal shoes, p zmeschennyh in radial channels, and additional schariki arranged in pairs in said channels between scharikami nests driven coupling part and the elastic element to cooperate with centrifugal shoes. 2. Coupling according to claim 1, characterized in that the elastic link is made in the form of spring-loaded fingers arranged with a butt end at an angle to the axis of the additional ball. 75 Fi.g.2