SU648773A1 - Cam mechanism - Google Patents

Description

The invention relates to the control elements of devices with limited power in the value of the control, to which TLT) are new requirements in terms of the accuracy of movement of the driven part, such as, for example, in spool distributors, 1x follow-up hydraulic actuators,

. Known cam loops with a geometric closure, containing a rotary cam, located in the groove of the fork formed by two cantilever beams, facing 1. And with their seals in one direction 1.

However, when a known mechanism works, it is inevitable that it will jam if a foreign particle gets into the groove near the fittings, if the gap in the cam-groove is smaller than the foreign particle size, and the moment supplied to the cam is insufficient to overcome the frictional forces. This forces the manufacture of a cam-groove pair with increased clearances, which reduce the accuracy of movement of the driven part and impair the dynamic properties of the mechanism,

 invention to reduce the likelihood of jamming of a mechanism when foreign particles get into the gap between the shoe and the fork by limiting fii, -i friction in a pair, 1ach () k-called dove, 1ichiny, iijie, the reading of which is provided by the calculated moment applied to fist

D, h -POI) the groove is made of two cantilever / s, n,. Natural beams, embedded in the rigid part of the fork with opposite ends.

When ionizing a foreign body,: nn,;, ii,), the area of the groove’s working section is provided with oi-limiting si, 1 friction due to deformation of one or both beams, and the total rigidity of the beams of the plzk to the nasocular one and can be selected and an obscene movement of the mechanism at a given moment on the cam.

In order to limit the deformation of the ba, -1) k under the influence of dynamic loads, worsening the accuracy of the fork movement, stops can be installed under the coisol ends of the beams, which can be made adjustable for new designs.

.v ----- Ha drawing shows the proposed mechanism for constructive implementation, two iipcjeKium.

The cam mechanism consists of cam 1 and fork 2, the working one of which is formed by cantilever beams 3, which are embedded in the rigid part of the fork with their opposite ends.

Restricting the deformation of the beams is achieved by installing the cantilever ends of the beams 3 stops 4 on the rigid part of the fork 2 of the node, which, after selecting a gap between them and the beams, turn the last, from () ns1, into beams with embedment and support, which have a significantly sore rigidity.

To increase the technological design of the pore 4, it can be made adjustable.

The described cam mechanism makes it possible to completely eliminate the technical gap in the cam-groove pair and even create a preliminary glue that fits the dead zone in the event of a non-foam cam mechanism in the hydraulic drive control devices. This is the case648773

The system is especially important for high-power following tracking systems with limited power in the control circuit.

Claims (2)

1. A cam mechanism containing a turning cam and a fork made in the form of two cantilever beams, in order to reduce the likelihood of seizure when foreign particles enter the gap between the cam and the fork, the cantilever beams are embedded in the rigid part of the fork with their opposite ends . 2.Kulachkovy. Mechanism sh. I, characterized in that, in order to: 1 limit the deformation of the beams under the action of dynamic loads, on the rigid part of the plug under  The ends of the beams are installed yHopi i, nanorime adjustable. Sources of information taken into account during the examination 1. Papept USA No. 2011602, cl. 74-436,1935.