All about creeper for walk-behind tractor

Mototechnics, in particular, walk-behind tractors, have not been the first year for the owners of agricultural plots to be faithful assistants who are able to carry out a wide range of work with the least effort and time. However, sometimes the operating parameters of these units are no longer sufficient to carry out some specific tasks, or the equipment functions poorly. In this case, a device such as a travel reducer (reduction gear) for a walk-behind tractor will help to cope with individual problems.

The creeper is a conventional reduction gear that increases the torque by decreasing the engine speed. The operation of the creeper is rational: when cultivating fertile or uncultivated lands, deep plowing, transporting heavy loads, or using heavy attachments. In day-to-day work in such conditions, it is necessary to control the work procedure as closely as possible.

The correct decision would be to slow down the engine speed and work at the lowest speed. However, in such a situation, power is also lost, which is unacceptable. Here motoblock reducer travel reducers come to the rescue. They make it possible, without decreasing the engine speed, and, therefore, without losing power, to obtain optimal control over the processing procedure, and even increase power.

Reducers for motor vehicles can have different structures and operating principles. Consequently, any of these mechanisms has different parameters, advantages and imperfections.

According to such indicators, the reduction gearboxes for motor vehicles available on the market are divided into several types.

• Gear reduction gears - this equipment has a particularly robust design. The steel from which the gears are made is coated with specialized protective agents, which significantly increases the stability and lengthens the period of use of the gears. Among the disadvantages of this type of device, it is necessary to focus on the high price.

• Worm reduction gearboxes - motor vehicles with motors equipped with vertical shafts are equipped with similar devices. The worm gear creeper for the machine is mainly intended for plowing of previously cultivated soil. The use of a worm gear reducer on uncultivated land leads to its inevitable failure.

• Chain creeper - equipment of this type has a long working life and an affordable price. The cover of the device can be collapsible and non-collapsible. The first sample is much more practical, since if a unit with a collapsible shell fails, it can in any case be repaired on its own.

• Combined (gear-chain) creeper - attachments of this type are the most suitable solution for equipping tractors. They are characterized by a low price, have a long functional resource and perfectly withstand high loads.

The high price of individual devices prompts the peasants to create reduction gearboxes on their own. At first glance, this will be quite difficult to implement. However, if you make an effort, you can create a high-quality device that will reduce the speed of motor vehicles.

Before proceeding with the manufacture of a reduction gear, it is worth making your choice: what kind of fixture you will create. In addition, it is very important to choose the ratio of the number of teeth of the driven gear to the number of teeth of the driving gear - the torque and speed of the output shaft will depend on this.

When making it yourself, it is advisable to opt for a chain creeper for a walk-behind tractor. It is characterized by high durability, and spare parts for it can be found almost everywhere. To mount a lowering device for motor vehicles, you must buy the following spare parts in advance:

• shafts - primary and secondary;
• a set of sprockets that have the ratio of the number of revolutions of the secondary shaft to the number of revolutions of the primary shaft required for operation;
• bearings, the standard size of which is intended for the diameters of the axles and shafts;
• chains, thanks to which the torque will be transmitted;
• corner profile - it is required to create a frame and fix the entire device;
• case - you can buy ready-made or do it yourself;
• sheet metal, 5 millimeters thick.

The assembly procedure for reducing the travel of the gearbox for motor vehicles is as follows.

• First of all, place the drive sprockets on the input shaft. In this case, you can practice keyway or flange connection. If the structure is large, then the elements can be fixed using spot welding. During the mounting process, make sure that the stars do not overheat, as this threatens them with deformation.
• Next, make up the input shaft from the 2 axle shafts. Place opposite flanges on its ends.
• Fix the driven sprocket between the flanges, then use the bolts to connect the axle shafts and the sprocket. If you do not want to equip the structure with bolted connections, then you can make a solid shaft, on which you need to make a keyway for installing the key. The imperfection of such a connection is that under the action of the forces of the axes, the asterisk has the ability to turn in any of 2 directions.

• The housing for the travel reducer can be made with your own hands, or you can use a ready-made factory design, in which there are already seats for the stuffing box packing and shaft bearings.
• Install closed-type ball bearings in the housing cavity. Basically, they have a cylindrical configuration and are installed "tightly".
• Place and fix the input shaft between the bearing eccentric pads - this will make it possible to adjust the shaft in its seat sockets. In this case, the correction limit should be equal to 15 of the normally tensioned chain of the device.
• Finally, put a specialized gasket in the reduction gear.

A home-made reduction gear created in a similar way is almost as good as its industrial prototypes in terms of quality and performance. They can be used to equip motor vehicles "Neva" and other agricultural machines of Russian and foreign manufacture.

Having made a creeper, it must be tested. To do this, it must be connected to the hitch of the walk-behind tractor, and also put wheels for the unit. If everything is done according to the rules, then the wheels will rotate slowly; in this case, the unit itself must be pressed against the surface of the earth.

For constructive activity, you will need:

• screwdrivers of various sizes;
• hacksaw for iron;
• pliers;
• locksmith yews;
• welding machine;
• hammers of various weights;
• rubber for gaskets;
• electric drill and drill.

If the tool and drawings are ready, it is necessary to prepare the material for welding the body or take a ready-made one. You can collect it from pieces of stainless steel. Prepared gears should freely enter the prepared housing. They can be taken from an old gasoline saw. The brand "Druzhba" or any other will do. The saw must be carefully disassembled and undamaged gears and shafts removed. They are cleaned and washed, then they are selected according to the dimensions according to the gear ratio. When calculating the gear ratio, it is necessary to take the number of idle revolutions of the engine crankshaft as a basis and add 10% to them.

When assembling the unit, the elements are carefully set into place in the body and scrolled. The case must close tightly - this will protect the elements from dirt and dust. Seals are mounted on the shafts. Lubricant is poured into the body cavity. Homemade fabrication is connected in the same way as a standard gearbox. To test it, start the motor and roll it on the ground. The component parts should rub a little with each other.

Requirements for your own safety when operating a reduction gear.

• During the work, it is required to wear extremely durable special shoes.
• Before starting to use the device, it is imperative to make sure that absolutely all fastening components are completely connected.
• It is necessary to lubricate all sprockets and chains with grease only before starting or after stopping the engine (it is recommended to perform a similar procedure at least once a year).
• This device belongs to a group of sources of high danger. It is forbidden to use it under the age of majority.

For creeper creepers for walk-behind tractor, see the next video.