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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The engine is made from cylindrical engine elements.

Because the crank pins are each offset degrees, the forward and back cylinders are synchronized. The differential ring gears are linked via an axle with 14 tooth bevel gears at either end.

The actuators are designed to work in compression during their power stroke.

Instructions For LEGO 8868 Air Tech Claw Rig

I’m sure no one will have any trouble finding a place to route even more pneumatic hoses! Model by Eric Albrecht. Flex system rigid sleeves are used as pneumatic tubes to span the sections between the pneumatic hoses. Click for an animation of the loader slewing. The pressure is split and fed to the inlets of four selector valves switches with two outputs each. The compressor has plenty of pneumatic lgo to lift the boom, even at full extend.

The color coded computer image shows the way the dual pneumatic cylinders are cross connected. The head end of one actuator is connected to the retract port of the other. Click for an animation of the engine in motion.


Because there is continuous supply of pressure, this model operates very smoothly and multiple functions can even be run concurrently. A pair of rack gears are connected to the actuators and are used to turn a 16 tooth spur gear. The smaller arm allows a greater range of motion; in this case almost 90 degrees. Click for an animation of the claw in motion. Why they never used this again is one of the great mysteries and tragedies of our time.

Click for an animation of the boom in motion. Selection of the switches in either direction allows pressure to flow to either chamber of the kego. 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.

LEGO Technic Air Tech Claw Rig () | eBay

Due to the small gear ratio, it operates very fast. A combination of an 8, 24, and another 8 tooth gear pass the torque up without changing the gear ratio or direction. This allows the claw to remain perpendicular to the ground no matter what the jib angle is. The claws are supported by 3 arms which are free to pivot at the ends. There are five pneumatic actuators which have ports at the head and rod ends to accept input from the switches.

Steering, V-6 engine, dual differentials, pneumatic compressor, slewing cab, luffing boom and jib, grasping claw. Click for an animation of the steering in motion.

The steering arms may seem small for a model of this size, especially since the weight of the model is cantilevered out the wheels via legk a single hole as a support couple. The overhead control drives an axle connected to a pair of 14 tooth bevel gears.



To solve this, the ring gear of the second differential is located on the opposite side. The second axle drives a pair of 16 tooth spur gears and then the steering rack via an 8 tooth pinion gear.

The second section is movable and is lifted by a single pneumatic actuator driving another pair of triangles. The steering mechanism itself uses steering arms and lsgo links as shown in the computer image.

Technic “triangles” are used as lugs to attach to the rod end of the actuator.

This serves to make this model pretty heavy. When extending, it draws in air from the atmosphere.

This way, pressure causes one to extend and one to retract simultaneously. A single compressor is integrated into the body.

Many of these hoses then pass aft through another beam and up through the center of the turntable for the loader. For the first time, a 9V battery box was actually 88868 into the body of a model instead of being remote.

One is on each axle, and one planet gear in the middle allows the axles to turn at different rates.