SU1288413A1 - Controllable cam - Google Patents

Abstract

The invention relates to mechanical engineering and is used in cam mechanisms with adjustable follower stroke. The purpose of the invention is to improve reliability by eliminating E € 5g: -7-t From the feed system / xSo-i whose cpedti is low daS / i-nm (L Dt system t nidauu by Sifcomta Sa & ffni to CX) 00 4 00

Description

gaps between the cam and the support element and the extension of the guide planes. In the cam body 1 there is a radially elastic cylinder 4 with cavities 2 and 3. The grooves 5 of the cylinder 4 are connected to the working medium supply system, the drive shaft 12, rigidly connected with cylinder 4.9 transmits rotational movement to body 1, which is converted into reciprocating (the main movement of the driven pusher, for the invention). The invention relates to mechanical engineering and can be used in cam mechanisms with and: changing 1) with a 1m stroke vein.

The purpose of the invention is to increase reliability.

FIG. shows an adjustable cam; in FIG. 2, sections A-A and

BB in FIG. 1.

The adjustable cam comprises a housing 1, a support element arranged therein with the formation of cavities 2 and 3, made in the form of a radially elastic cylinder 4 connected to the housing 1 in a fit with adjustable tension. On the side surface of the cylinder 4 are grooves 5 connected by means of the grooves 6 and 7 with a high pressure working medium supply system (not shown).

Cavities 2 and 3 are connected through grooves 8 and 9 of cylinder 4 and grooves 1 O and P of the drive shaft 12 to the low pressure working medium supply system (not shown). The drive shaft 12 is rigidly connected to the cylinder 4 to prevent the cam from turning around the axis of the cylinder 4 in case 1 there are thrusters 13.

Adjustable cam works as follows

The drive shaft 12 through the cylinder 4, mounted on the housing 1 with a tension, informs the latter of the rotational motion.

changes of the plunger stroke in KfiHHBKH 5 high pressure medium is supplied. In this case, cylinder 4 deforms NfHpyeTCH and decreases tension between it and body 1: Then, mix the body 1 relative to and, 4, by supplying the medium to po. 2 and 3 to the required value, after which the pressure is released and the mating between the cylinder 4 and the body is restored;

50

five

The rotational movement of the cam body 1 is converted into a reciprocating movement of the associated slave t (zlkatel.) If it is necessary to change the magnitude of the stroke of the pusher, the high-pressure working medium is fed through the grooves 6 and 7 under pressure 5 : radially elastic cylinder 4 is deformed, thereby reducing the tension r between cylinder 4 and body 1 "

Thereafter, pressure is applied to one of the cavities 2 or 3 of the working medium supply system, under the action of which the body 1 is moved relative to the cylinder 4 by the required amount of change in the stroke of the pusher,

After obtaining the required amount of displacement of the housing 1 relative to the cylinder 4, the pressure of the working medium from the cavities 2 and 3 and the grooves 5 is discharged, and the fit-fit coupling is established between the cylinder 4 and the housing 1.

If necessary, the process of adjusting the stroke of the follower pusher is repeated.

The construction of a cam with a housing mounted on the supporting element with a tension enables an increase in reliability due to an increase in the load capacity of the cam and eliminates the need to constantly maintain pressure in the supply system.

312884

Claims (3)

Invention Formula 1, Adjustable cam, comprising a housing with a central cavity, placed in a cavity and hermetically 5 separating it into two parts, a supporting element for communication with the drive shaft and a working medium supply system, connected to parts of the housing cavity and intended to be regulated by it The position of the fact that, in order to increase reliability, the supporting element is designed as a cylinder, installed3 foot in the central cavity of the housing with adjustable tension and filled with grooves on the outer surface, and the cam is equipped with an additional system for supplying the working medium connected to the grooves and designed to regulate the magnitude of the tension. 2. The cam according to Claim 1, characterized in that it is provided with two stoppers placed in respective parts of the cam cavity. 3. The cam according to claim 1, characterized in that the housing is detachable. / J 72 7J