SU1434201A1 - Slider-crank mechanism with stops - Google Patents

Abstract

The invention relates to crank-slider mechanisms with the recovery of the mechanical energy of moving masses. The purpose of the invention is to expand the kinematic capabilities of the mechanism by stopping the output links in the final phases of the movement. Slider 7, moving in the direction indicated by the arrow, rotates the crank arm 3 and simultaneously moves the mass 11 of the payload. A stop 6 fixed on the crank arm 3 acts on its arm 4 and moves the slider 8 with the mass 12 through the rod 10. At the point Da, the slider 7 stops and the slider 8 moves by inertia. The connecting rod 10 moves from the stop 6 to the stop 5, also attached to the crank arm 3, informs the latter of rotation, and the slider 7 moves in the opposite direction. At point B, slider 8 will have a stop until the crank arm 3 rotates at an angle between stops 5 and 6, after which slider 8 moves in the opposite direction. The cycle is then repeated, providing regenerative reciprocating motion of masses II and 12 with stops at the extreme positions. 1 il. with s

Description

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I The invention relates to crank-to-slide converters for rotational movement in reciprocating and on-turn and can be used in manipulators, accumulators, and printing machines.

A: The purpose of the invention is the expansion of the kinematical capabilities of the mechanism by allowing the output units and the associated masses of the executive bodies to be stopped in the final phases of the movement.

The drawing shows a kinematic: mechanism diagram.

The mechanism contains a base 1 with a straight-line guide 2 and a crank in the form of a two-armed lever with arms 3 and 4 of different lengths. The long arm 4 has the possibility of independent rotation around the axis of the crank, and on the short arm 3, stops 5 and 6 are fixed, limiting the turn of the arm 4, interacting with its lateral sides. The angle between the shoulders 3 and 4 is different from 180 °.

Sliders 7 and 8 are mounted in guide 2, and through cranks 9 and 10, are hingedly connected respectively to shoulders 3 and 4 of the crank. With sliders 7 and 8, masses 11 and 12 are rigidly connected in the form of, for example, executive bodies or relocatable goods. The masses of all links of the mechanism are essentially I less than masses 11 and 12. The mechanism works as follows. In the position of the mechanism corresponding to the position of the hinges A, Bi, Ci, D, there is an unstressed connection of the moving mass 11 and the mass 12 due to the vanishing function of the transfer function between these masses. When moving the slide 7 in the direction indicated by the arrow, the stop 6 drives the crank-slider mechanism OAB. At the same time, the speed of the mass 12 increases, and the masses 11 decrease, reaching a zero value at the point D-2, when the transfer function is equal to infinity. At this moment, the slider 8 is at point B2 and has a maximum speed, i.e., there is a recuperative energy exchange between masses II and 12. Arm 4 of the curvature, driven by mass 12, continues rotation relative to the stopped crank arm 3 and turns to the set stops 5 and 6, the angle is reached in position A 2 with an emphasis 5, and slider 8 is moved to point B. In this case, an unaccented connection of the moving mass 12 and the fixed mass 11 occurs after exactly 11 in the D-2 (Dz) position. Under the action of mass 12, it moves from position B z to

the position of the gate and stop, the slider 7 is moved to the point Oz and gets the speed opposite to the original. The shoulders 4 and 3 of the crank appear in the position AZ and C3. In this position, the crank arm 4 stops and stops

the contact with the support 5, and the crank arm 3 is turned relative to it to the Cz position by the angle limited by the stops. contact stop 6 with the shoulder 4 of the crank. When this occurs, the height of the slider 8 in

position Vz (Vz) and the movement of the slide 7, the connecting rod 9 and the crank shoulder 3 to the Da position, Cz. Further movement is similar: in the D (O) position - you stand slider 7 and the displacement 84 of the slide 8, in the position Bj (Bi) -

the slider 8 protrusion and the Ds-D movement of the slider 7, after which the system returns to its original position.

In this way, regenerative reciprocating movement of masses 11 and 12 is achieved with their exposures at the extreme positions in the absence of impacts. The use of the invention allows for high-speed reciprocating motion of the masses, not requiring the use of a powerful drive for

automatic provisioning

Claims (1)

Invention Formula Crank-slider mechanism with stops, containing a base with a straight guide, mounted on the base of a crank in the form of a two-arm corner lever with shoulders of different lengths, the axis of rotation of which is crossed with the longitudinal axis of the guide, two sliders mounted in a guide on either side of the crank , and two connecting rods, and arnirno tying the crank shoulders with the corresponding sliders, characterized in that, in order to expand the kinematic possibilities, the angular lever is made detachable, its long arm is mounted on its axis with the possibility of rotation, and the mechanism is provided with two stops fixed to the short arm and intended to periodically interact with the corresponding lateral surfaces of the long shoulder.