SU1513262A1 - Torque-limiting device - Google Patents

Abstract

The invention relates to mechanical engineering, in particular, to mechanical means used as an independent device in hand-operated mechanisms or in conjunction with any safety clutch in a machine drive. The purpose of the invention is to enhance operational capabilities by providing increased accuracy of operation. The driving member comprises a flange 5 with a leash 6 and pins 16. The pins enter the grooves formed by spring-loaded levers hinged on the driven disc 7. When the driving shaft rotates, 4 pins 16 press the levers and, if the levers do not turn and compress the springs, then the disk 7 rotates synchronously with the shaft 4. If the levers under the action of pressing the pins 16 rotate to compress the spring, then the disk 7 is displaced in the circumferential direction by the driver 6. The supporting cylindrical surface 8 of the disk 7 contacts the surface of the sleeve 9. The disk 7 thereby locks The shaft 4 becomes stationary, and the safety clutch, mounted at the device inlet, slips. 3 il.

Description

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the springs are compressed, the disk 7 rotates synchronously with the shaft 4. If the levers under the action of pressing the pins 16 rotate, compressing the springs, the disk 7 is displaced in the circumferential direction by the driver 6. The supporting cylindrical surface 8 of the disk 7 contacts the surface of the sleeve 9. The disk 7 is the most wedged and the shaft 4 becomes stationary, and the safety clutch mounted at the entrance of the device slips. 3 pe.

The invention relates to mechanical engineering, in particular to mechanical safety devices, and can be used as an independent device in mechanisms and devices with a manual drive or in conjunction with any safety clutch in a machine drive.

This device, triggered at a certain amount of torque, which it transmits (passes), is located after the safety clutch and is either a self-contained drive unit, or it can be built into one case with a safety clutch. In the latter case Included in the safety clutch as an additional unit.

The purpose of the invention is to enhance operational capabilities by providing increased accuracy of operation of safety couplings, i.e. stabilization of the magnitude of the transmitted moment.

FIG. 1 is given the proposed coupling, a longitudinal section I in FIG. 2 shows section A-A in FIG. one; in fig. 3 - section BB in FIG. 2

The device consists of a housing 1, in which a shaft 4 with a flange 5 and a lead 6 is mounted on bearings 2 and 3. Ball 4 is the driving unit of the device. The slave unit of the device is a brake disc 7 with an eccentric opening, into which the driver 6 freely enters. The disc 7 with the supporting surface 8 is installed with the possibility of rotation (with a small gap) in the sleeve 9 tightly inserted into the housing 1.

In the brake disc 7 pivotally, on the axis x 10, levers 11 are installed. The disk 7 has angled projections 12, in which threaded bushings 13 with springs 14 are mounted, and peripheral projections 15, to which levers II are pressed in pairs. The flange 5 is fitted with pins 16, which are included in the grooves formed in pairs by levers 11. The brake disc 7, which is the output link of the device, is provided with protrusions 17, by means of which the device is connected to an actuator, for example, by means of a cross (not shown) couplings. Using the cheek 18 with the protrusions 19, the device is connected, for example, through a crosspiece of a cross compensating coupling to a safety coupling of a drive (not shown). Case 1 is fixed either on the gear case of the actuator or directly on the case of the actuator (not shown).

The device works as follows.

The pins 16 press the levers 11 and if under the action of this pressing the levers do not move away from the projections 15, the brake disc 7 is integral with the shaft 4, and its bearing surface 8 does not touch the mating surface of the sleeve 9. 4 is transferred to the brake disc 7. If the levers 11 depress from the projections 15 under the action of pressing the pins 16, which means that the maximum permissible torque is exceeded, then the brake disc is displaced in the circumferential direction by the driver 6 until the bearing surface 8 contacts the surface of the sleeve 9. Torm This disc is wedged because the ratio of the radius on which the axis is located

the leash from the center of the coupling, and the radius of the bearing surface 8 is chosen such that it provides self-braking, t, e. jamming. In this case, the shaft 4 becomes stationary, and the wounding coupling (not shown), mounted on the device inlet, slips.

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Claims (1)

Claim A torque limiting device comprising leading and driven elements installed in a fixed housing with the possibility of elastic interaction, characterized in that, in order to expand operational capabilities by providing improved accuracy of operation, the leading element is made in the form of a flange with mounted on the lead surface with a lead and pins, the driven element is made in the form of a disc with an eccentric, open hole mounted with a gap relative to the inner cylindrical surface of the housing Thieme and protrusions on facing to the driving 'element end, and hinged to disk ry25 chagov pairs of spring-loaded to the projections adjustable springs, the pins flange arranged between mutually spring-loaded lever driven disk and leash flange - 30 eccentric hole etoko disc. b- * fi & z