RU29974U1 - Safety clutch - Google Patents

Description

2002126148

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Safety clutch

The utility model relates to the field of mechanical engineering and can be used in drive systems of various mapping.

Known safety clutch, including the leading element, two coupling halves and pressure elements with force limiters in the form of glasses and ball clamps (SU, copyright certificate No. 1479748, M.cl. F 16 D 7 / 02.1988 g.).

This embodiment complicates the design, and therefore its reliability (the overall reliability of the system is equal to the product of the reliability of its constituent elements P (t) Pi (t) P2 (t) ... Pn (t)), contributes to the emergence of dynamic loads and vibrations.

Known safety clutch containing a leading element located between two coupling halves, and pressure elements that create forces on the friction surfaces (Flick EP Mechanical drives of agricultural machines. - M .: Mechanical Engineering, 1984, p. 95, middle figure).

However, there are also disadvantages to such a coupling: it is also complex in design (it has separate friction discs, an additional sleeve, etc.), significant fluctuations are possible during its slipping, since the pressure elements do not have damping properties and have a linear characteristic.

The purpose of the utility model is to simplify the design and reduce dynamic loads and vibrations during its operation.

To achieve this goal in a safety clutch containing a leading element located between two coupling halves, and a pressure element that creates a force on the friction surfaces, the leading element is made in the form of a pressed pulley

M.kl.7R16D7 / 02

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wood, and the pressure element has a conical shape and consists of several alternating rubber rings and metal discs.

The drawing shows a safety clutch in section.

The safety clutch consists of axial displacement along the key 2 of driven half-couplings 3 and 4 mounted on the shaft 1, between which there is a leading element in the form of a pulley 5 made of pressed wood. The force on the working surfaces of friction is created by a conical-shaped pressing element, consisting of several alternating rubber rings 6 and metal disks 7. Adjustment is made by nut 8.

Safety clutch operates as follows.

During normal operation, the torque from the pulley 5 due to friction coupling is transmitted to the driven coupling halves 3 and 4, and then through the key 2 to the shaft 1.

When overloaded, the shaft 1 and the driven coupling halves 3 and 4 stop, and the pulley 5, having overcome the forces on the friction surfaces, continues to rotate.

The proposed safety clutch has a simple design, since the leading element made of pressed wood performs two functions - a pulley and friction elements (this function is performed by its side surfaces). During operation of the safety clutch, fluctuations during slipping are reduced due to the conical shape of the elastic element of rubber rings and metal disks, due to the fact that the elastic element has a non-linear characteristic and has damping ability. In addition, the pressed wood, from which the driving element is made, behaves like an elastic body with instant overload, which absorbs dynamic phenomena.

Claims (1)

A safety clutch comprising a driving element located between two coupling halves and a pressure element creating a force on the friction surfaces, characterized in that the driving element is made in the form of a pressed wood pulley, and the pressure element has a conical shape of several alternating rubber rings and metal disks .