LEGO 8868 PDF

Released in , set has the first and only motorized pneumatic find on any LEGO® model, and in fact this is the only set with a motorized compressor. Find great deals for LEGO Technic Air Tech Claw Rig (). Shop with confidence on eBay!. Shop LEGO Technic Air Tech Claw Rig. Free delivery and returns on eligible orders of £20 or more.

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Click for an animation of the differentials in motion. The compressor has plenty of pneumatic pressure to lift the boom, even at full extend. Click for an animation of the jib in motion. A vertical axle which connects to the 16 tooth gear drives a horizontal axle which passes through the holes in the upper turntable.

The second section is movable and is lifted by a single pneumatic actuator driving another pair of triangles.

The claw can be lowered to grasp the rear bumper to help keep the crane stable when the truck is in transit. Because of the very small area, this actuator has a small output force and the grip of the claw is not very strong, but it does the job. Click for an animation of the claw in motion.

This can be seen clearly in the animation. One is on each axle, and one planet gear in the middle leto the axles to turn at different rates. Head end pressure extends the piston, while rod end pressure retracts it.

The claws are supported by 3 arms which are free to pivot at the ends. Pneumatic Claw A grasping claw on the end of the jib is driven by one of the lwgo miniature pneumatic actuators. When driven to retract, it forces air out through the port. Technic “triangles” are used as lugs to attach to the rod end of the actuator.

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Wheels and Tires This set uses six of the smaller size foam 20×30 tires and wheels. Click for an animation of the loader slewing.

Instructions For LEGO 8868 Air Tech Claw Rig

The differentials are made to house 3 of the 14 tooth bevel gears. The compressor cylinder itself looks like a small actuator but has a port only at the head end. The color coded computer images can be used to decipher the routing of the hoses in this system, 88868 can then be used to derive the ,ego of this mechanical computer. Pneumatic Jib The jib has two sections, a fixed section and a movable section.

Many of these hoses then pass aft through another beam and up through the center of the turntable for the loader.

Pneumatic Slew By this time, there had been leggo a few cranes which featured a slewing turntable, but this is the first time it was controlled pneumatically and it only happened one more time many years later. Incidentally, if you are wondering how long it took me to model all of those pneumatic hoses on the computer, the amount of legp is too long to comprehend.

The overhead control drives an axle connected to a pair of 14 tooth bevel gears. A belt then actually drives the crankshaft of the engine via a pair of pulleys which increase the rotation about 3 times. With a compressor, 4 switch valves, 4 large actuators, one small actuator, and four rigid tubes, oego are a total of 23 flexible pneumatic hoses to route through this behemoth.

The steering mechanism itself uses steering arms and toothed links as shown in the computer image. The smaller arm allows a greater range of motion; in this case almost 90 degrees.

This gives it excellent mechanical advantage to elgo the weight, but also means that the total boom rotation is small; in this case about 45 degrees. The head end of one actuator is connected to the retract port of the other.

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Click for an animation of the engine in motion. A big diesel truck like this would indeed probably have a large displacement 6 cylinder engine although probably elgoso this engine fits very well. The pressure is split and fed to the inlets of four selector valves switches with two outputs each.

LEGO Technic Air Tech Claw Rig () | eBay

The engine is made from cylindrical engine elements. Motorized Compressor Feast your eyes on the only Technic pneumatic compressor.

I’m sure no one will have any trouble finding a place to route even more pneumatic hoses! Click for an animation of the boom in motion. While this allows them to rotate at the same rate, it could make one differential rotate backwards. Differentials The dual rear axles are both “live” and use a pair of differential gears which incorporate a built in 28 tooth ring gear which can work either as a bevel or leog spur, similar to the leyo tooth crown gear. The second axle drives a pair of 16 tooth spur gears and then the steering rack via an 8 tooth pinion gear.

Unlike the other actuators, this one has to work in both tension and compression, and in fact the lower tension force is what is used to close the claw. This makes the engine turn fast. Each pair of pistons shares a common crank pin. This serves to make this model pretty heavy. The two cylinder banks have a standard Pego angle of 90 degrees. This allows them to be clipped to hooks which makes certain that the hoses move with the boom and jib and do not become tangled.

A single legoo is integrated into the body.