If you thought about making a motorcycle dog with your own hands, it is worth considering that this design is not at all overly complex. That is why you can make it yourself, without resorting to the help of specialists. The high popularity of the described motorized towing is explained by the fact that they have compact dimensions and excellent cross-country ability. Among other things, they are unpretentious in maintenance and consume quite a bit of fuel during operation.
general description
Before making a motorcycle dog with your own hands, you should understand its design features, as well as assembly technology. In fact, this design is an oversized caterpillar motorized unit designed to tow all kinds of small loads.
Engine selection and installation
The engine is the most important component of the described homemade product. In this case, this is a fairly popular moped motor brand Sh-58, which is the fruit of domestic production. The main advantage of this device is that it is designed for the use of a manual switch box. In addition, it should be noted that foreign towing engines can be used in motorized towing. In the manufacture of a motorcycle dog with your own hands, you can use a small engine, which is produced under the brands Honda and Yamaha. The main feature of these engines is their versatility, because they are excellent for creating motorized dogs, as well as for other devices. Among them are small power plants and home-made walk-behind tractors.
Engine Tips
In the process of manufacturing a motorcycle dog with your own hands, it is recommended to think about the number of engine strokes. Two-stroke varieties are best suited, which, compared to four-stroke ones, have smaller sizes and weights, while the power characteristics remain approximately the same.
Controls
Do not forget that the design must have controls. In this case, it is preferable to use a steering wheel that has built-in controls. Thus, the design will have a gearbox switch, as well as a clutch and gas handle, borrowed from old motor vehicles.
Assembly
If you will make a motor dog with your own hands, the diagram and drawings of this design will allow you to eliminate the occurrence of errors. Before you begin to assemble the chassis, you need to take care of the presence of thrust bearings. After they will need to grind bushings. In the role of the supporting structure, a welded frame should be used, which will include water pipes of different diameters. To give these elements the necessary shape, they need to be filled with dry sand, and then cork tightly enough. After this, the workpiece must be placed in a vice, starting to bend slowly using a blowtorch in the required places. In order to ensure smooth bending, you need to apply a reference template, which is previously made of plywood.
Technology of work
If you will make a motorcycle dog with your own hands, the diagram and drawings of this device will help you with this. As soon as all frame elements will have the necessary shape, they can be fixed among themselves by means of welding clamps. These manipulations are necessary so that when defects are formed at the assembly stage, they can be easily eliminated. After all errors have been eliminated, the frame can be finally fixed by welding. DIY drawings of motorized dogs can easily be prepared without the help of specialists. For mounting the engine on the frame, blanks made of sheet steel are excellent. They are made according to a pre-fitted template, the last of which is made of cardboard. It must fit the frame. The workpieces are fixed on the engine, only after the resulting design must be attached to the frame system using welding tacks. At the next stage, the engine must be disconnected from the workpiece, finally fixing it on the frame.
Work on collapsible shafts
You can easily make a motor dog with your own hands if you first familiarize yourself with the technology of work. In the caterpillar block, collapsible shafts, which are made of bearings and bushings, should be used. The latter are machined for bearings, while the wall thickness should not be more than 5 millimeters. The most impressive loads in the towing vehicle will be on the rear axle. It should be made the lead. Why is the drive sprocket fixed to the rear shaft, connected to the gearbox using a chain drive. In motorized towing vehicles, in addition to composite shafts, composite wheels are used. If a motorcycle dog is made with your own hands, the scheme will help you in carrying out the work. Each wheel will consist of two three-millimeter cheeks, as well as several tens of hooks for the ground. The latter must be made of steel pipes. To dampen vibration with wheels, rubber bushings must be installed at the end of the hooks.
Mover
Before you make a motorcycle dog with your own hands, you need to think about how the tracks will be made. In this example, an option is considered that involves the use of a conveyor belt. Its width should be 220 millimeters. The tracks for the walk-behind tractor are made of smooth birch rails, the length of which is 1260 millimeters. In order to strengthen the tracks, it is recommended to use steel ridges, reinforced to the bars. Fixation of the track elements is carried out by bolts that have an M6 thread.
Conclusion
Managing such a motor dog is almost no different from managing a moped. The gas handle is located on the right handle of the steering wheel, while on the left is the gearshift lever and clutch handle. The steering wheel is attached to the frame through two pipes that are welded to the U-shaped plug. The latter is fixed on the rear axle with steel washers. Due to the fact that the motor dog’s engine is located inside the track, it’s impossible to bring it into action using kickstarter. In view of this, it can be slightly modernized. To do this, use a piece of pipe, at the end of which a slot is made of such a size that the lever drive enters into it. Then, using welding, it will be possible to fasten the kickstarter lever and the pipe.