DIY

Electromechanical snake – toy for children

Electromechanical snake - toy for children The hobby of the master is making various mechanical toys. His collection already has many different items ranging from pumps and air motors to pterodactyls, cars and dinosaurs. The most amazing thing is that most of his products are spinning, turning and moving. Those. these are not just static figures, but quite working models.
Most of the details in the works of the master are printed on a 3D printer. You can get acquainted with them by following this link, and in this article we will get to know one of his works – an electromechanical snake.

By the way, after the reviews of homemade products , which have parts printed on a 3D printer, readers have questions where they can be printed? But if a few years ago this issue was relevant, now, after many began to assemble such devices on their own, it is no longer there. In addition to the fact that such parts can be ordered in specialized workshops, the price of the 3D printer itself has dropped significantly. There are already models around $ 100 on the market, for example the Easythreed X1 or the larger Voxelab Aquila V2 for $ 200. Of course, the size of parts and functionality of such printers cannot be compared to professional models , but for home use, for novice users, it is quite at the level.
Tools and materials: -3D-printer; -Soldering iron; -Cyanoacrylate glue; -Oil for lubrication; -Motor gear N20 100 rpm, 6 V DC; -Battery compartment 4 AAA with switch;
-Four AAA batteries;
-Spring;
-O-ring R08 (inner diameter 11 mm, section 2.5 mm);
-String;
Step one: principle of operation
The principle of operation is as follows. During operation, the mechanism collects two chains into one chain and lifts it vertically upwards. At the top of the chain is the head of the snake. When fully assembled and raised, the mechanism changes its direction of movement and disassembles the snake back into two chains, lowering it into the cartridge.
For mechanical reverse, the mechanism uses a rotary toothed cart. When the carriage rotates upward, the carriage gears drive one gear to collect and lift the snake out of the cartridge. And when the carriage rotates to the down position, the carriage gears drive another gear to disassemble and lower the snake back into its cartridge.
However, without stopping, the carriage will be constantly in operation. We need some kind of mechanism to stop it at a certain point. To stop the movement of the carriage in the desired positions, the carriage wheel has two locking lugs; one for the ascent position and one for the descent position.
Electromechanical snake - toy for children Step two: 3D printing
The attached file “Parts.pdf” contains the name, quantity, infill, layer height and support for all 3D printed parts for this mechanism. Please note that parts with the extension “.3MF” are double extrusion prints.
Files for printing parts can be downloaded below.
Arm, Slide, Switch.stlAxle, Gear, Ascend.stlAxle, Gear, Descend.stlAxle, Motor.stlAxle, Sprocket.stlBase.stlBolt, Cartridge.stlCarriage, Arm.stlCarriage, Wheel.stlCartridge, Lid.stlCartridge .75.stl 16t) And Axle.stlGear (.75m, 16t) .stlGear Sprocket (.75m 32t) .stlGear, Ascend (.75m 32t) .stlGear, Descend (.75m 32t) .stlGear, Motor (.75m 16t) .stlHead, Green.stlHead, Yellow.stlHead.3mfSlide, Switch.stlSnake, Chain, Green, 1.2mm pins.stlSnake, Chain, Yellow, 1.2mm pins.stlSprocket (15 Teeth) .stlSprocket, Arm.stlSwitch.stl Step Three: Pins
The movement uses two metal pins (14mm and 8mm length). The diameter of the pins is 2 mm. The master made them from a string.
Electromechanical snake - toy for children  Electromechanical snake - toy for children Electromechanical snake - toy for children  Electromechanical snake - toy for children The 14mm rod is installed and glued into the hole in the Slide part, Switch.stl, and the 8mm rod is installed in Switch.stl.
 Electromechanical snake - toy for children Electromechanical snake - toy for children Next you need do the following:
Place the switch assembly into the base.
Slide the switch slider across the base, push down on the switch assembly, then slide across the base.
Align the switch assembly exactly between the two marks on the slider assembly.
Glue switch assembly to slider assembly.
Place “Arm, Slide, Switch.stl” on the pin on the slider assembly, then rotate it.
Electromechanical snake - toy for children  Electromechanical snake - toy for children Electromechanical snake - toy for children  Electromechanical snake - toy for children Electromechanical snake - toy for children  Electromechanical snake - toy for children Step four: carriage
To assemble the carriage, proceed as follows:
Place the spring on the pin “Carriage, Arm.stl”.
Place the “Gear (.75m 16t) .stl” on the pin on the carriage. < br> Place “Gear, Motor (.75m 16t) .stl” in the center hole in “Carriage, Wheel.stl”.
Align the gears and assemble the knot.
Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Next, you need to solder the battery wires to the engine terminals so that the engine rotates clockwise, as viewed from the side of the gearbox shaft.
Put the “Axle, Motor.stl” gear on the gear motor shaft.
Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Install the carriage into the base. Install the motor on the other side of the carriage. The carriage assembly must be centered between the motor mount and the carriage legs and rotate easily.
Electromechanical snake - toy for children  Electromechanical snake - toy for children Electromechanical snake - toy for children  Electromechanical snake - toy for children Step five: gears
These gears are responsible for lifting and lowering.
Place “Gear, Ascend.stl” in the base and secure in place with “Axle, Gear, Ascend.stl”. Make sure the gear spins freely.
Place “Gear, Descend.stl” in the base and secure in place with “Axle, Gear, Descend.stl” and “Gear (.75m 16t) And Axle.stl”. < br> Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Step six: the snake
To collect and install the snake you need to do the following:
Install O-ring on “Axle, Sprocket.stl”.
Electromechanical snake - toy for children  Electromechanical snake - toy for children Align the ends of the “Snake, Chain, Green, 1.2mm pins.stl” and “Snake, Chain, Yellow, 1.2mm pins.stl” links together.
Install the snake head.
 Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Electromechanical snake - toy for children Install “Sprocket (15 Teeth) .stl” into the cartridge, positioning the small hole in the sprocket as shown in the photo.
Electromechanical snake - toy for children  Electromechanical snake - toy for children Insert the end of the snake link into the cartridge assembly and carefully twist the sprocket to thread the chains along the guides.
 Electromechanical snake - toy for children Electromechanical snake - toy for children Install the cover …
Electromechanical snake - toy for children Electromechanical snake - toy for children Expand the cartridge facing you and install the lever on the sprocket shaft. In this case, the lever should point down, and the hole in the sprockets up.
Installs a gear on the sprocket shaft.
 Electromechanical snake - toy for children Electromechanical snake - toy for children  Electromechanical snake - toy for children Electromechanical snake - toy for children Step Seven: Final Assembly
Now you need to align the two nodes.
Move the lever to the far right. < br> Electromechanical snake - toy for children Carefully place the cartridge assembly onto the base assembly, aligning the hole in the sprocket assembly on the base assembly with the threaded hole in the base assembly.
Electromechanical snake - toy for children Electromechanical snake - toy for children I inserted the pin into the sprocket axis hole.
Electromechanical snake - toy for children  Electromechanical snake - toy for children Tighten the two mounting screws.
Electromechanical snake - toy for children  Electromechanical snake - toy for children  Electromechanical snake - toy for children Now it remains to connect the power supply and everything is ready .
Electromechanical snake - toy for children

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