Scissor Load Lifter
A scissor Load lifter is used to raise, lower, stack, convey and transfer material between two or more elevations. Lift tables can incorporate rotating platforms, tilt platforms, conveyors as part of their design. The project we are working upon is basically a scissor load lifter which is driven by mechanical terms. Mechanical actuation uses screw, spiral, gear, chain or lever systems to raise or lower the lift.
These lifts are suited for precise control applications where positioning at specific elevation is required or where the lift must maintain a specific elevation for an extended period of time.
Movable Scissor load Lifter:
We are making a movable scissor load lifter so that it can serve more than one workstation. This movable load lifter is manually based lifter. It is basically used to transport a load from one location to another.
A scissor lift is a type of platform which moves in vertical direction. The mechanism incorporated to achieve this function is the use of linked, folding supports in a criss-cross ‘X’ pattern, known as a pantograph. The upward motion is achieved by the application of pressure to the outside of the lowest set of supports, elongating the crossing pattern, and propelling the work platform vertically upwards. The platform may also have an extending ‘bridge’ to allow closer access to the work area (because of the inherent limits of only vertical movement). The operation of the scissor action can be obtained by mechanical means (via a lead screw or rack and pinion system).
rack and pinion gears
We are operating the scissor load lifter manually by using rack and pinion gears and handles. The upper plates and lower plates are connected through metal strips arranged in a scissor mechanical design. Rack and pinion gears are attached with the upper plate and also with the nut bolts. When we tighten the screw manually by using rack and pinion gears by applying mechanical pressure on the handle. The scissor load lifter gets collapse and we loose the screw by applying force on the handle Anti clock wise it gets open and finally it lifts the load which is placed on the scissor load lifter up. There are Two conditions for moving up the scissor lift and moving Down the scissor lift.
When we move the handle Clock wise
When we move the handle in clock wise direction the Scissor strips gets Collapse as we are using channels for this purpose. It gets goes down in this procedure.
When we move the handle in ANTI Clock wise
When we move the handle in Anti-clock wise the scissor strips gets open via channels. This time the scissor load lifter goes up and we can lift the weight which we have placed on it.
More output in less time
Base on the application of the device, I would say that it is very useful for small industrial, and in hospitals as a patient lifting bed.
After all the testing we are successful in representing our idea of the project in practical way. In future we can modify this scissor load lifter by using Hydraulic and Pneumatic cylinders. We can operate the whole function automatically with these cylinders. The project on which we are working is working with very ease and efficient way.