ry motion characteristics and applications of four bar linkage, food machinery factory used in production of linkage, in addition to the basic type and lots more.
The shape and structure of these institutions are a diverse group, each have different, from the surface seems to be differ in thousands ways unrelated, can not find out the regularity, not easy to study uniformly.
If we are from all the components of relative motion forms of organization rather than obsessing over its all sorts of appearance to analyze all kinds of organization, then we will find food machinery factory production of vacuum packaging machine
have a lot of planar linkage mechanism is a typical of planar hinge four-bar linkage through evolution, derived.
Their relative motion is exactly the same or have a certain relationship, and can use a similar method to study these institutions.
we are now in packaging machinery of planar hinge four-bar mechanism as the foundation, combined with actual application in the production of the four-bar linkage, to analyze how they evolved.
In practice can the plane through the following three way hinge four-bar linkage turned into other forms of four-bar linkage.
Expand turn pay:
if will give bag vacuum packaging machine, automatic packaging machine
of the radius of the crank pin of four bar linkage, making it more than the length of the crank, and make the crank A to point B as the center of the circle round artifacts, but still goes around A point, make out of one end of the connecting rods are attached to A crank round ring set, its inner coincided with the disc to match.
Institutions after the change, although structure shape changed, but we according to the analysis of it produced by the movement has changed due to the length of the BA, and point B of the track is still a BA radius circle, so the body components of relative motion remains unchanged.
We called this agency eccentric mechanism.
The geometry of the eccentric point B to the rotation of the distance between A point called the eccentricity, it is equal to the length of crank.
This agency, because of the large shaft neck radius and multi-purpose on the mechanical of crank pin under impact load or crank length shorter.
2, different components for frame
in the study of food packaging machinery of planar hinge four-bar linkage basic type, we have found that when the different lengths of the same components as the frame can be obtained when different institutions.
So, if you can pay in part to turn into a mobile of four-bar linkage structure as the foundation, to take turns to take different components to frame respectively, can be developed kinds of different forms of the new institution.
Crank connecting rod mechanism: artifacts to frame the crank connecting rod mechanism.
Transduction mechanism: back to component for rack, if the component is less than 2 components, then back transduction mechanism, the component 2 and 4 components can rotate for the whole week, the agency application in rotary pump shaping machine, slotting machine machine, etc.
Crank rolled piece of institutions: component 2 as the frame is crank swing block mechanism.
Such agencies is applied to all kinds of cylinder engine and work machine, is widely used for casting machinery and metallurgical machinery pneumatic actuators.
Mobile guide rod mechanism: artifacts as frame, mobile guide bar mechanism.
Hand pump is the application of such institutions.
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