Lawn mower with its own hands with grass collection. Preparing

Lawn mower with his hands with grass collection. Preparing

It’s about time to cut the grass, and in my household I did not have a lawnmower. Of course, you can buy a ready-made, factory-made. But for those who like to make crafts, to pay 1-2 thousand or more for the simplest device, usually needed a few times a year. is unaffordable luxury, especially since the lawns in the garden areas usually are not large.

Lawnmower “Luzhok”, made from hand-made and purchased materials with a minimum set of tools. drill, hammer, screwdriver, pliers, hacksaw for metal. It is desirable to have a vice and an emery machine.

Use of the ready-made chassis from a toy baby carriage, electric motor from an electric vacuum cleaner, old vacuum cleaner brush, parts from outdated household video equipment, a piece of plastic tubing and a handle from a baby umbrella can reduce labor intensity and manufacturing time.

In a garage, in “stocks” for a long time dusted Soviet electric plower EP-3M, with a collector motor of 220 volts, 450 watts.

The motor has a design similar to vacuum cleaner motors. the motor has a thread on the shaft, cooling impeller and a sleeve with an internal thread which fixes it. As the chassis, I applied the “running gear” from a child’s toy stroller, and as a handle used the plastic handle from a child’s faulty umbrella.

Remove the umbrella tube by turning it out of the handle with pliers or with a vice. Handle dock with a piece of polypropylene water pipe length of about 120-140 cm. To do this we turn the handle into a shallow cone, leaving a little more than the inside diameter of the pipe. Heat the pipe from the inside with a soldering iron, removing the inner layer of plastic on the cone as well. When the heating becomes sufficient, connect the parts. Fix the joint 25-30 mm wide with a self-drilling screw with a wide head.

Polypropylene tube is inserted into the brush from a vacuum cleaner, but because of the significant difference in diameter we use an adapter sleeve, such as rubber from car assemblies (you may have to adjust its inner and outer diameter, which I advise to make a little cone for ease of assembly), also fixing screw.

First put the sleeve tightly on the pipe, then finally adjust it to the inner diameter of the brush.

We use a brush, which has 2 degrees of freedom: tilt and rotation, such as this:

This allows for better control of the lawnmower. closer “approach” to curbs and fences. The brush is attached to the chassis any way you want, I took off the bottom part, made cuts in the top for the chassis wire, then installed the bottom part of the brush (overlay) back. The connection is rigid and reliable enough. Somebody may find it more convenient to connect to the shield. here you implement your own design vision of the solution. Lubricate rotating brush assemblies. Thus, the control handle is dielectric and the operator will not be affected by the electric current in case of a breakdown of the motor insulation. To increase the life of the chassis, we remove the wheels, drilled holes in them for the axles, made sleeves from pieces of fine tubing. Aluminium tube from the evaporator of a domestic refrigerator was made to fit.

On the chassis we mount a shield made of thin sheet metal (the lower part of the body of the video player), as well as the motor on brackets of metal strips 3-4mm thick.

The shield prevents the flight of stones and grass, but it is desirable to wear safety glasses and closed shoes when mowing.

The impeller of the fan, similar to the impeller of the section from the suction unit of a vacuum cleaner, is mounted above the shield, so that the air is sucked into the electric motor from above, and is ejected by the impeller from below, contributing to good cooling. Make a hole in the shield for the motor shaft, I just punched it with a few strokes of my screwdriver. The hole is rough-edged and asymmetrical, as it turned out later on this solution helps self-cleaning of the shaft from the wrapped grass. At high RPM of the motor shaft the use of solid metal blades can be dangerous. it is unlikely that the hobbyist has the possibility to choose the necessary metal, and the use of unknown metal can cause serious injury. That’s why we equip the mower with a cutting unit with a fishing line. About the attachment unit of the fishing line (working body) I will write a special note. Several variants were tried out. Who has the opportunity to buy a ready-made knot from the factory trimmer, with a spool. probably the best way out. I haven’t had that opportunity. I have checked the following: a lid from a jar of baby food, a polyethylene canning jar lid (the method was found on the Internet, and according to the author, it gave excellent results), two washers, 1.8 mm dia was clamped between them and others. The line for the trimmer was either torn or wound up on the shaft, or cut through the walls of the attachment node in a matter of minutes. So it was decided to make the knot out of metal. I chose a part from an old, disassembled video player, the rotating part of the video head, in the picture it is a shiny part with circular lines.

The central hole is drilled to the diameter of the existing screw to the motor shaft or adapter sleeve. At me it is 8 mm.

After experiments with the green line 1.8 mm, which showed insufficient “vitality”, and was also weak for cutting hard grass, a red line for the trimmer 4 mm was installed. One piece of trimmer line is simply threaded through the holes in Ф4 (the holes are informative and drilled so that the trimmer line enters with the greatest possible friction). The edges of the hole should be rounded as much as possible, as this is where the trimmer line will be cut, for a “role model” look at how this is done on the factory trimmers and lawnmowers.

How to make a mower from a chainsaw with your own hands?

The easiest option to make is a homemade mower based on a chainsaw. The design of a chain garden tool already has almost everything you need to work. It remains for the manufacturer to complete the device with the missing nodes.

Before you start assembling a lawnmower from a chainsaw, you will need to study the drawings. During their preparation it is necessary to specify the dimensions of all used parts and the order of their installation directly on the mower.

After studying the diagrams, you need to prepare the materials that will be needed during the work:

• metal angle. needed to assemble a rigid supporting frame;
• steel plate. required for installing and fixing the motor;
• 2 pairs of wheels from a garden cart or children’s wheelchair;
• Fixing rail or a pair of rotor discs;
• 5 cm piece of pipe;
• Gear and bearing to connect to the pipe;
• blades of steel, which can be removed from a household wood hacksaw;
• bolts, nuts, brackets and other mounting hardware.

Of the tools the designer will need a welder, a drill with a set of drills for metal, as well as an angle grinder with a set of disks of different diameters.

Druzhba chainsaw mower with your own hands

To get good and durable grass mowing equipment you need to follow the right steps. A standard self-propelled lawnmower is assembled in the following order:

• First, the tube must be inserted into the groove of the bearing used, and the gear must be stationary inside;
• To the end, which remained free, it is necessary to weld 2-centimeter “ears”. After that, holes must be drilled in the “ears”;
• To make the blades, you will need to cut the blade from a hacksaw. It must be cut into several equal parts;
• To fix the knives to the rotor disk or to the prepared bar, rivets must be used. The diameter of the finished structure should be about 40 cm;
• After that, you will need to weld a rigid frame, using a metal angle for this purpose. The frame must be reinforced with steel spacers, which will not let it break when the mower hits a tree or a bench. The dimensions of the support frame must match the dimensions of the chainsaw;
• Inside the frame you must install a rectangular base. the mower body will rest on it. To make the equipment as balanced as possible, all its connections should be placed strictly at right angles and be sufficiently rigid;
• To the finished frame it is necessary to weld mounts, which will help to fix the wheels, handles and separate metal hooks required to support the entire device;
• After that, you need to install the wheels;
• Next, it will be necessary to secure the chainsaw by removing the saw headset from it in advance. The tool should be fixed firmly on the frame;
• Then it will be necessary to cut a steel plate along the contour of the finished body. It must be installed over the chainsaw. The result will be a reliable metal casing, which will protect the saw from moisture and grass;
• The next step is to screw the pipe with the cutting blades of the homemade mower to the drive sprocket of the chainsaw maker;
• At the end will remain to install the handles, to which you need to put the levers and control buttons of the lawnmower.

According to this scheme, not only the rotary, but also the segmented finger or chain mower is made. The difference between them lies only in the design and functioning of the cutting assembly.

Required accessories

The simplest version of the mower includes the following parts:

• knives;
• motor;
• wheels;
• handles for operating the structure;
• protective cover;
• frame, on which all the components of the mower will be attached;
• parts for controlling the system: RCD, switch, cable and plug for connecting electricity.

The frame of the lightest model will include a metal sheet with a thickness of 2 to 3 millimeters with a hole in the middle for the passage of the motor shaft. The sheet is aligned with the frame made of metal corners. A motor is attached to the sheet at the top, a guard with protection is installed at the bottom, wheels are mounted on the sides of the axle, as well as handles for controlling the device.

If the product uses a flange motor, then it can be attached to the sheet itself by drilling holes in the latter, which will be identical to the holes in the flange. If the engine is of the classical type, then it is necessary to weld or bolt several perpendicular posts from the corner to the sheet, so that they coincide with the legs of the engine.

In the corners are made special holes for fixing the engine. If the holes are created as grooves, it will help to combine the motor with the frame when attaching. Such an assembly will be very useful for selecting the optimal cutting height of the grass. It will be easier to create holes for different heights of the engine.

The central place of the lawnmower will be the assembly, which will consist of a mandrel with short blades attached to its surface (one long blade can also be used).

Lawnmower from an angle grinder. how to make it with your own hands?

The easiest option for making. this is a homemade mower on the basis of a chainsaw. The design of the chain garden tool already has almost everything you need to work. It remains for the manufacturer to complete the device with the missing assemblies.

Before you begin assembling a lawnmower from a chainsaw, you will need to study the drawings. During their preparation, it is necessary to specify the dimensions of all used parts and the order of their installation directly on the mower.

After studying the diagrams, you need to prepare the materials that will be needed during the work:

• metal angle. necessary for the assembly of a rigid supporting frame;
• Steel plate. required for mounting and fixing the engine;
• 2 pairs of wheels from a garden cart or baby carriage;
• fixing rail or a pair of rotor discs;
• A 5-centimeter piece of pipe;
• Gear and bearing to connect to the pipe;
• Blades of steel blade, which can be removed from a utility wood hacksaw;
• bolts, nuts, staples and other fasteners.

Of the tools the designer will need a welder, a drill with a set of metal drills, and an angle grinder with a set of discs of different diameters.

A simple mechanical lawnmower is assembled from an angle grinder and a small cart to carry water. The finished construction is best made collapsible. To do this, the household tool must be fastened with bolts and ties.

• Fix the angle grinder to the cart, using the nuts and bolts that will be screwed into the brackets;
• Make a knife. for this you will need a piece of metal plate with a thickness of not less than 5 mm. The blade can be round or 3-blade. The first option is suitable for mowing dense weeds, and the second option for fighting large weeds. It is also possible to use a steel cable, which should be wrapped around a metal washer, about 3 cm high. Such a knife can cope with any type of vegetation;
• After that, you need to install a steel or plastic box on top of the angle grinder, which will protect it from moisture and grass.

Design Advantages

Engage in the manufacture of homemade electric mower encourage several reasons:

• The low cost of the device in comparison with analogues factory-made.
• Eco-friendliness of the electric motor. An “electric lawn mower” does not produce harmful exhaust emissions like a gasoline mower.
• Low noise level.
• Easy operation: no need to store and periodically refuel.
• Compact size.

But you should be prepared for some peculiarities:

• The electric lawnmower is not independent: its working radius is limited by the length of the power lead. But this disadvantage is of little importance for a lawn with up to 12 acres.
• Limited power. Petrol lawnmowers are usually more powerful, and the electric mower’s power is also limited by the wiring.
• The risk of electrocution when working on wet lawns.

The homemade version is inferior to factory-made models in the following ways:

A mechanical lawnmower

Mechanical lawnmower, made by your own hands, is characterized by less noise, lack of power consumption, the ability to work in the rain, but more labor-intensive manufacturing. The problem is the difficulty of correct selection of blades, sizes of wheels and gears.

The mower consists of two kinds of blades: one of them rotates and collects the grass, and the other one is stationary and cuts the pulled-out grass. The mechanics of the mower requires a good driving speed of the blades, created by the transmission of gears and wheels. The blades must be very sharp, protected by a guard from the outside environment.Important! The creation of this variant requires more patience, correction of deficiencies identified by experience.

Fixing the legs and wheels

Feet for such a device can serve strips of tool steel with a total thickness of 2-3 millimeters and a width of 20 to 50 millimeters. The smaller will be the legs, the better will be the cutting. But a thicker blade is much stronger. When you encounter bumps and other obstacles like stones or foreign bodies during mowing, durability is of great importance. The construction of the legs is as follows:

• Blades can be fitted to the product in two ways. The first is a knife in the form of a long strip, which is mounted on a mandrel symmetrically to the axis. The length of the blade should coincide with the working width. 30-50 cm. The sharpened ends of the strips play the role of cutters. Mandrel and knife can look like a solid, inseparable part, which has a flange with a hole for the fitting, that can be welded on or attached to.
• The second type. two short blades of 50-80 millimeters in length, which are installed at the edges at an angle of 180 degrees. They can be straight or with a slight tilt. Two or one bolt can be used to hold the blades. The first method is considered more reliable, but the attachment with one bolt allows the blade to fold and not to break when hitting a rock or bump. The fasteners of folding knives must always be inspected, as over time they can wear out the screws.
• The steel of the knives must be strong, not brittle in any case, otherwise they will have to be replaced very soon. Such a design can even cause harm to a person, in case one of the knives falls off to the sides. Experience of masters has shown that for this purpose the wood saw blade with a thickness of two millimeters is suitable.
• To make the knife, two blanks are marked on the blade in the form of strips that are cut out with an angle grinder. Holes are drilled in the workpiece for subsequent fastening. Then all that remains is to sharpen the blade, place it on the frame and center it.

If it is rather difficult to drill the holes, then it is allowed to put the blade on a metal surface with a hole of larger diameter than the hole in the blade, then strike the punch. The ledge, which appeared after the blow, can be removed with a file (if the metal is soft enough) or with a sharpener. If the hole does not fit the diameter, the process is repeated once more.

There are quite a few options for creating functioning legs, as well as materials for their creation. It is very important to sharpen them well, center them (so that there is no vibration) and fasten them securely. When attaching the blades to the mandrel, washers and locknuts must be used. Without this, the attachment bolts will start to unscrew due to vibration.

The cutting edges are best made with a slight downward bend, like the original lawnmower models. This will greatly slow down the process of winding the grass on the motor shaft of the device. You can also create a special disc that will cover the shaft. If the power of the engine is close to the capacity of brand-name products, you can buy a special high-quality knife for the lawnmower.

The diameter and location of the wheels should be chosen so that the blades are at a total distance of 5 to 6 centimeters from the surface of the ground. This cutting height is ideal for the lawn. If the vegetation will be cut at a great height, it will bend, allowing the blades to pass over it and remain uncut. Lower mowing is very difficult with this device because of the unevenness of the ground.

You have an old chain saw “Druzhba” or “Ural”?

Here is an example of people’s ingenuity. Beautiful frame from the angle is discarded for lack of use in the warehouse in the scrap metal. Special wheel assemblies with a rotation of 1800 on the pivot were found there. Without such a frame, the platform could be welded. The taken out working unit is made with an independent drive from the chainsaw by means of a belt drive. The torque is transmitted to the discs, where the cutting tools are metal chains 25 cm long. Lawn mower from a chainsaw with their own hands is effectively used for several years. An improved version with a rotary cutter and a two-wheeled frame is made. It is more productive, but difficult to produce.

Every craftsman takes pride in his ingenuity and the functionality of his tool. However, it should be understood that the collective mind of designers, designers creates no less functional, but safer tools.

The advantages of homemade tools include:

• the ability to save money on tools
• the ability to use parts that have lost their marketable value but are usable;
• thorough knowledge of his tool and the possibility of its improvement and repair.

The height of grass mowing is not adjustable, and not always the clearing turns out to be cut evenly. The lack of a grass catcher box increases the proportion of manual labor. A heavy tool with narrow wheels sometimes spoils the appearance of the lawn. this is an objective answer to why it is better to use a factory-made tool.

What a homemade blade should be?

To avoid the need for frequent sharpening, it is recommended to make the knife from stainless steel. Sharpen it unevenly in order to protect the motor shaft from damage: sharpen the edges without touching the place where it is near the shaft, because the grass is practically not cut in this place, but only wrapped around the blade.

Strips of tool steel 20-50 mm wide and 2-3 mm thick are a suitable starting material for this part. A thin blade is thicker than a sturdier one and cuts weeds better.

• A strip at the ends of which the blades are sharpened and held;
• Composed of two knives attached to each other at an angle of 180 degrees. They can be arranged straight or at an angle.

In the first case, the length of the blade and the working width are 30-50 cm. The length of the knives used in the second case does not exceed 50-80 cm. There are several ways to attach knives. One bolt or two. reliable, of course, is the second option. But knives fixed with one bolt can develop without deformation or breakage in case of an obstacle.

The knife can have a folded design, i.e. it is attached to the steel strip by welding or bolts with a sharpened segment. The most unusual would be a knife that is a sharpened solid disc.

How a home-built blade should be?

So that the knife does not need to be sharpened often, it is recommended to make it of stainless steel. Sharpen it unevenly to protect the motor shaft from damage: sharpen the edges without touching the place where it is next to the shaft, because the grass is practically not cut in this place, but only wound around the knife.

Tool steel strips 20-50 mm wide and 2-3 mm thick are a suitable starting material for this part. A thin blade is thicker than a sturdier one, and cuts weeds better.

• A strip at the ends of which the knives are sharpened and held;
• Composed of two knives attached to each other at an angle of 180 degrees. The wheels can be arranged either straight or at an angle.

In the first version, the length of the blade and the working width is 30-50 cm. The length of the knives used in the second case does not exceed 50-80 cm. There are several ways to attach the blades. One or two bolts. reliable, of course, is the second option. But the knives, fixed by one bolt, can develop without deformation or breakage in case of an obstacle.

The knife can have a folded design, that is, it can be attached to the steel strip by welding or bolts with a sharpened segment. The most unusual would be a knife that is a sharpened solid disc.

Assembling the lawnmower

The following tools are needed to create:

The finished guard is put on the shaft, then a sharpened knife is installed, screwing the entire mechanism. When this is done, the wheels are attached to the frame, for which the corners should be welded with pre-drilled holes.

The size of the wheels is chosen so that the knife goes above the ground at a height of 5-7 cm. In the lower position it is more likely to contact the soil, and in the higher position the weeds are chopped up ( not cut).

Mechanical lawnmower with their own hands

The machine of this type is characterized by much less noise compared to the motor types. There is no need for a power cord, which makes it cheaper. Mechanical grass mower can be used even in the rain. And the amount of physical labor and finance required is minimal. The main problem is the difficult selection of blades, gears and wheels.

Manual lawn mower mechanical mower has two types of blades:

In order a mechanical mower can produce a good level of output, it is necessary to ensure a high speed of cutter turnover. And this, in turn, depends on the gear motion of the gears to the wheels. Knives should be sharpened as sharply as possible and protected by a sheath on a mandatory basis.

Note. The process of making a manual lawnmower mechanical with their own hands is considered difficult, and requires from the creator endurance and care. Troubleshooting in this case is a trial and error process.

It is important to observe the safe use and care of the machine. The first thing to do is to clear the area of stones and other objects that may get in the way. If the knives hit a stone, they can become deformed and fly in different directions, and this is clearly not safe. After completing the work of the mechanical lawnmower, the knives need to be cleaned, this will prolong their service life.

Lawn mower blades. Types

This is one of the most important parts that affects the quality of the unit and the work process as a whole. Knives come in two varieties. compound and one-piece.

Solid knives

Such a knife is a steel plate with a sharpened working surface along its entire length, in the center there is a hole. A blade consisting of two blades needs to be balanced to prevent the shaft of the power unit from breaking during vibration. To avoid a rapid blunting, the blade’s sharpening angle must be at least 60º.

In order to lay the grass evenly during mowing the back side of the blade should be bent like a propeller. Use a gas torch to work the steel. A blade guard is fixed in the center of the blade. This blade works smoothly and smoothly until you first hit a rock or a bump. Knives with folding blades are more durable.

Compound knives

To produce this kind of knives it is allowed to use steel of lower strength class than for solid types. The sharpening is done on a 5 cm area of the blade. in case of impact the cutter of quality material will only bend 90º, but will not break completely.

By shape knives can be curved, trapezoidal, shaped. This prevents the grass from wrapping around the cutter bar during mowing with a mechanical lawnmower. The length of the blade should not exceed half a meter. Sharpen both sides of the blade. It is also possible to use a solid disc in the work, which is characterized by high durability and reliability of operation.

The handle for the lawnmower is not a simple detail for holding the unit while mowing the grass, but also an element of control that allows you to set the trajectory of movement. If you have a motor-driven machine in your hands, you must be sure to equip the handle with a safety cutoff button.