SU1381290A1 - Slider-rocker offset shifting mechanism - Google Patents

Abstract

The invention relates to hinged-lever switching mechanisms with the rotation of the working body through an angle of up to 180. The purpose of the invention is to increase efficiency and durability by reducing energy costs and shock loads. When the slide 3 moves along the guide 2 under the action of the cylinder 5, its groove 4 carries along the first roller 8, which is at the beginning of the guide 2. The roller 8 carries along the connecting rod 7, which rotates the articulated arm 6. After turning the rocker 6 by 90 ° The second groove 4 enters the second roller 8, while the first roller leaves the guide 2 and its groove 4. The second roller 8, shifting toward the end of the guide 2, turns the rocker arm 6 to 180 °. During the return stroke of the slide 3, the cycle is repeated in reverse order. 1 hp f-ly, 3 ill. with (/)

Description

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FI.1

The invention relates to mechanical engineering, in particular, to hinged-lever switching mechanisms with rotation of the working member by an angle of up to 180 and more, but less than 360, and will be used, in particular, in hydraulic actuators.

The purpose of the invention is to increase efficiency by reducing energy consumption by increasing the smoothness of the rotation of the working body and increasing the durability of the mechanism by reducing the load on the load „

FIG. Figure 1 shows the kinematic diagram of the mechanism with the practical connecting rod; Fig 2 is the same with a two-piece connecting rod; Fig. 3 is a diagram of the application of forces and geometric parameters of the links.

The mechanism comprises a base 1 with a rectilinear guide 2, mounted in the guide 2 of the slider 3 with two slots 4 made therein, the drive of the reciprocating movement of the slide 3 in the form of, for example, a hydraulic cylinder 5 mounted on the base 1 of the beam 6, is hard associated with a rotary working body (not shown), and a double-shouldered connecting rod 7 that is hinged to the rocker arm 7 with shoulders of equal length. Ia the ends of the connecting rod 7 installed rollers 8, interacting with the grooves 4 of the slide 3,

It is possible to make a connecting rod 7 of two parts, each of which is connected by a single condom to the rocker arm 6, and the other through the roller 8 interacts with the corresponding slider groove 4. In this case, two supplementary -i, tangible guides 9 and 10 are made in the base 1. , perpendicular to the main guide 2 and interacting each with the SOBIM roller 8 of the connecting rod 7 (Fig 2), the distance between the grooves 4 in the slide 3 is equal to the length of the connecting rod 7,

To ensure smooth rotation of the rocker arm 6, its length must be equal to or greater than the value of the L of the dezaxial, and the dezaxial L must lie within the limits of L 0.5 t / 2 L., While the length of the connecting rod shoulder 7 is determined by the relation

.UJKC

2

H.

where s / „s, s is the maximum angle of rotation of the rocker arm 6.

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five

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The mechanism works as follows.

When the slider 3 is moved along the guides 2 under the influence of, for example, the hydraulic cylinder 5 rod, its groove 4 carries the first roller 8, which is at the beginning of the guide 2, Roller 8, moving together with the slider 3 along the guide 2, carries connecting rod 7 (or its corresponding part), which, in its turn, rotates the rocker arm 6. After rotation of the rocker arm 6 by 90 °, the second roller 8 of the connecting rod 7 enters the second groove 4 of the slide 3, while the first roller from guide 2 and its groove 4. The second roll 8, from the beginning to the end of guide 2, es rod 7 dovorachivat rocker 6 to 180. During the return stroke the rod 5 gidrodilindra cycle is repeated in reverse sequence.

Formula

acquisitions

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1. Koromyslov-slider deaxial switching mechanism, containing the base with a straight direction Y0; eH5; designed to interact with a slider, characterized in that, in order to increase efficiency and durability, in a slider at a distance from each other equal to the length of the connecting rod, two parallel grooves are made, the mechanism is provided with nnym at respective ends of the connecting rod ,, rollers intended for engagement with corresponding slots of the slide, and the dimensions of the mechanism links are selected from the conditions

50

L, L -, L g 0.5 / 2 L,

Where

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L - desaxial-,

L is the length of the rocker;

Bw - rod length

o-ks

- we set the maximum angle of rotation of the rocker.

2i Mechanism of Po 1, of which is based on the fact that the connecting rod has two additional prints made of two parts, which with one ends are hingedly connected with the rocker and are designed to interact with the other ends with the corresponding pairs.

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  Fig2

at the base of the slider, and at the bottom of the guide rails, perpendicular to the main and intended to interact with the corresponding rollers of the connecting rod.

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Claims (2)

Claim 1. Rocker-slider disaxial switching mechanism comprising a base with a straight guide, a slider installed in it, a reciprocating slide actuator mounted on the base of the rocker arm and pivotally connected to the rocker arm with two shoulders of equal length, designed to interact with the slider, characterized the fact that, in order to increase efficiency and durability, two parallel grooves are made in the slider at a distance from each other, equal to the length of the connecting rod, the mechanism is equipped with installed at the corresponding ends of the connecting rod with rollers designed to interact with the corresponding slots of the slide, and the dimensions of the links of the mechanism are selected from the conditions LL _k ; L g 0.5 <2 π _ω , where L is deaxial, L _K is the length of the rocker; B _w - the length of the connecting rod; ~ set maximum angle of rotation of the beam. 2i Mechanism by π. 1, characterized in that the connecting rod is made of two parts, which are pivotally connected at one end to the beam and are designed to interact with the other ends with the corresponding slider sections, and at the base there are two additional rectilinear guides perpendicular to the main one and designed to interact with the corresponding connecting rod casters.