Vibration in jack: up and down movement

[Micheal_Leo]

i have this mechanism in real life where the linkage move up and down through rollers rotating forth and back , but when mechanism move there is lot of vibration , please suggest any idea how to reduce vibration on the sides indicated by arrow .

 

[Micheal_Leo]

the structure should be stable and avoid vibration and also should sustain weight equally

 

[Baluncore]

What causes the platform structure to rise or fall?
How is the force applied?

To remain parallel, the scissors must be constrained for the X legs to remain parallel between the two sides, opening and closing at the same rate.

I see heavy torque tubes between the sides of the platform frame, but none between the scissor halves. Torque tubes could be placed across the machine from the fixed pivot of the scissor legs, one in the base, the other above it, in the platform. That should level the platform and prevent chattering, with a staggered, rise and fall.

There are alternatives that use flexible wires in tension, but those are more complex in this situation.

 

[Lnewqban]

If the parts forming the base on which the rollers move is as flimsy as represented, adding some transversal bracing may help.

 

[Micheal_Leo]

What causes the platform structure to rise or fall?
How is the force applied?

To remain parallel, the scissors must be constrained for the X legs to remain parallel between the two sides, opening and closing at the same rate.

I see heavy torque tubes between the sides of the platform frame, but none between the scissor halves. Torque tubes could be placed across the machine from the fixed pivot of the scissor legs, one in the base, the other above it, in the platform. That should level the platform and prevent chattering, with a staggered, rise and fall.

There are alternatives that use flexible wires in tension, but those are more complex in this situation.

the forces on top of platform while bottom is moving also at same time , two hydrulic cylinders insatlled on top platform that asssist in motion( roller rotates)

 

[Baluncore]

Draw one side of the scissor mechanism, and show the hydraulic cylinder attachment points and rollers.

Is there a reason why the hydraulic cylinder is mounted on the moving platform, and not on the fixed base, where flexible hydraulic lines, moving with the structure, would not be required?

 

[sophiecentaur]

but when mechanism move there is lot of vibration

What sort of frequency are you talking about? Is it swaying, rumbling or singing?