RU1789800C - Crank gear - Google Patents

Abstract

The invention relates to mechanical engineering. The purpose of the invention is the expansion of kinematic possibilities. When the crank 3 and the shaft 7 are rigidly connected with it, the movement by means of the slider 8, the connecting rod 4 is transmitted to the slider 6, which makes a reciprocating movement along the guide 5, and the link 12 performs a rocking motion. The oscillation amplitude of the slider b and the backstage 12 is changed by moving the frame 11 in the guides 2. 2 yl.

Description

The invention relates to mechanical engineering and can be used in automatic machines of various industries, as well as in robotics.

Known crank mechanism containing two cranks of equal length connected rigidly by an inclined shaft installed in coaxial bearings, a slider interacting with an inclined shaft, a driven link.

A crank mechanism is known, comprising a base with straight guides, a crank, a connecting rod, an additional guide and an output link kinematically associated with it.

The disadvantage of this mechanism is that it does not provide reciprocating movement of the driven link with an adjustable stroke during operation.

The aim of the invention is to expand the kinematic capabilities by

providing control of the slave link.

Figure 1 presents a diagram of the crank mechanism; Fig. 2 is a diagram of a possible embodiment of a crank mechanism.

The crank mechanism comprises a base 1 with rectangular guides 2, a crank 3, a connecting rod 4, an additional guide 5 and a kinematically connected output link 6, a shaft 7, rigidly mounted on the crank 3 in the same plane with the axis of its rotation, under a sharp at an angle to it, the sliders 8 and 9, pivotally connected to each other, the slider 8 is mounted on the shaft 7, the shaft 10, rigidly mounted on the slider 9, the frame 11 mounted in the linear guides 2, the link 12, pivotally connected to the frame 11, and kinematically associated with the slider 9, the connecting rod 4 with one Tzom pivotally coupled to the output link 6, and the other with the rod 10, the additional guide 5 is fixed on the frame perpendicularly to the axis of rotation

With

with

vi with

U 00 O O

the crank 3, the linear guides are parallel to the axis of rotation of the crank.

The mechanism works as follows.

When the crank 3 is rotated, the inclined shaft 7 is rotated. If the frame 11 is stationary, then the slider 9 swings in the same plane parallel to the cranks. In this case, the coolie; sa 1.2 rotates relative to the frame 11, and the connecting rod 4 informs the reciprocating movement of the slider 6 along the guide 5.

In this case, the stroke of the slider 6 will be equal to two radii of rotation of the axis of the rod 10 relative to the axis of rotation of the crank 3.

Claims (1)

SUMMARY OF THE INVENTION A crank mechanism comprising a base with straight guides, a crank, a connecting rod, an additional guide and a kinematically connected output link, characterized in that, in order to expand the kinematic possibilities, the straight guides are parallel to the axis of rotation of the crank, the mechanism is equipped with a shaft rigidly fixed to the crank in the same plane with the axis of its rotation at an acute angle to it, two sliders, a ball 5 0 5 0 If the frame is moved along the guides 2, then the stroke of the slider 6 will change from maximum to zero and then again to maximum. The stroke of the slider b can be set in any position depending on the position of the frame 11. It should be noted that the cranks 3 can have different lengths. Thus, in the proposed mechanism, the stroke of the slider 6 is changed during operation. In this case, the driven slider can be moved in both one and two directions simultaneously. nirnno connected to each other, one of which is mounted on the shaft, a rod rigidly mounted on another slider, a frame mounted in rectilinear guides, and a link, articulated on the frame and kinematically connected to the second slide, the connecting rod at one end pivotally connected engaged with the output link and the other with a rod, and an additional guide is mounted on the frame perpendicular to the axis of rotation of the crank. figure 1 FIG. I