Car repairs in garage conditions often turn into a test for the back and nervous system, especially when access to the bottom, exhaust system or suspension elements is required. The standard solution in the form of a board with wheels bought in a store often disappoints owners: flimsy plastic cracks, and cheap bearings wedge from the first dust that gets. That's why. squirt It is an ideal choice for a craftsman who appreciates the durability and ergonomics of his or her workplace.
Creating your own tool allows you not only to save the budget, but also to adapt the design to specific tasks and dimensions of the garage. You can choose a profile of any thickness, install reliable rotary wheels and add a comfortable mattress that won’t slide down while working. Unlike the factory counterparts, lay-in This is done with a margin of safety, which is critical when working with heavy trucks or SUVs.
In this article, we will discuss all stages of production: from the selection of materials and preparation of drawings to final assembly and testing. We will look at the nuances that beginners often miss and provide proven solutions for creating a professional tool. The optimal length of the platform for a universal sunbed is 1000-1100 mm, which allows you to comfortably accommodate a person of average height, without resting your head against the engine. Be prepared to turn the repair process into a safer and more comfortable activity.
Selection of materials and preparation of tools
The first step to creating a quality tool is the correct selection of raw materials. The base of the sunbed should withstand the weight of an adult plus a lot of tools that can lie nearby. The most popular and affordable material remains a rectangular cross-sectional profile pipe. The best choice will be profile-pipe size 40x20 mm or 50x25 mm with a wall of at least 2 mm. The use of thinner metal will lead to deformation of the structure under load.
Plywood is traditionally used for the frame skin, but it is afraid of moisture and oils that are inevitably present in the garage. A more modern and durable solution is sheet aluminum 3-4 mm thick or composite materials. If the budget is limited, you can use moisture-resistant plywood, but it must be treated with special impregnations. Aluminum leaf It is preferable, as it is light, does not rust and easily washes from dirt.
☑️ Materials for purchase
Don’t worry about the wheels, especially the wheels. Cheap plastic rollers will quickly fail on the rough concrete floor. You will need rotary mechanisms with rubber or polyurethane coating and, critically, with a sleek, sleek, and sleek, sleek, sleek, sleek, and sleek, sleek, sleek, sleek, and sleek. bearing. Also stock up on quality paint, primer, welding electrodes (or fasteners if the assembly is on bolts) and materials for soft coating.
Drawings and sizing calculations
Before cutting metal, you need to create an accurate design. Drawing slide-bed It does not have to be done according to GOST, but it must contain all the main dimensions and mounting points. The standard width of the platform is usually 350-400 mm, which provides stability and does not interfere with the hands when working. The length varies from 900 to 1100 mm depending on the height of the user.
When designing, take into account the height of the finished product. Too low a bed will be uncomfortable to roll under the car with low ground clearance, and too high can rest on the suspension elements ahead of time. The optimal height from the floor to the surface of the sunbed is about 100-120 mm (including wheels). Use it. CAD programmes Or just millimeter paper to visualize the frame.
Nuances of frame geometry
When calculating the length of longitudinal beams, remember that the wheels take up space. If you cook a frame in size 1000 mm, the total length with the installed rotary mechanisms can increase by 20-30 mm on each side, which is important for cross-country in tight places.
The table below shows the recommended sizes of elements for a medium-sized sunbed that will suit most motorists:
| Element of construction | Materials | Number (s) | Size (mm) |
|---|---|---|---|
| longitudinal beam | Profile 40x20 | 2 | 1000 |
| Cross-section (front/back) | Profile 40x20 | 2 | 350 |
| Cross-section (centre) | Profile 40x20 | 1 | 350 |
| Wheel attachment | Corner 30x30 | 4 | 80x80 |
It is important to determine the place of installation of wheels in advance. Usually they are fastened at the corners of the rectangle, retreating from the edges of 50-70 mm. This provides maximum stability and prevents turning over in sudden movements. Don’t forget to add a place to the head if you plan to do it.
Frame manufacturing and welding work
The assembly process begins with cutting the blanks according to your drawings. Use a grinding machine with a disk on metal to obtain even slices. Before welding, be sure to clean the ends of the pipes from rust and burrs to ensure high-quality melting of the seam. Welding the frame requires care: first collect the rectangle on the hens, check the diagonals and only then cook clean.
To strengthen the structure in the central part, where the main load on the lower back, it is recommended to weld an additional crossbar or even two, connecting them with longitudinal beams. This will prevent the deflection of the bed under the weight of a person. If you do not own welding, you can use a bolt connection, drilling holes and installing powerful bolts with a diameter of at least M8, but the welded version is more reliable.
⚠️ Attention: When welding a thin-walled profile (less than 2 mm), there is a risk of burning through the metal. Use a minimum current and cook in short stitches in a staggered manner, allowing the metal to cool to avoid warping the frame.
After welding works are completed, the seams must be cleaned with a grinder. This will not only improve the appearance, but also remove sharp edges that you can cut. The finished frame is degreased with a solvent and covered with a primer. For garage tools, soil enamel “3 in 1” is perfect, which protects against corrosion and immediately gives the finishing color.
Installation of wheelbase and moving elements
The choice of wheels is the stage where the maneuverability of your tool is determined. For the concrete floor of the garage, polyurethane wheels with a diameter of 75-100 mm are ideal. They do not leave traces, are silent and have high wear.poise. Plastic wheels are only suitable for ideal conditions, but they are noisy and can crack when hitting the threshold of the observation pit.
The fastening of the wheels is carried out through metal corners. They can be welded to the lower end of the profile or screwed with bolts from the bottom of the frame. The second option is preferable, as it allows you to replace worn wheels without cutting metal in the future. Make sure the wheels’ rotary mechanism has protection from dust and dirt, otherwise they will start creaking quickly.
For additional functionality, stoppers can be installed on the rear wheels, although this is not strictly mandatory for a rolling sunbed, as it is rarely used as a stationary platform. The main requirement is that the wheels should rotate freely and do not have a backlash in the vertical plane, which will ensure smooth running.
Platform skin and creation of comfortable coating
When the metal base is ready, it is the turn to create a working surface. If you use plywood, cut the sheet by the size of the frame and attach it with screws, having previously drilled holes in the metal. On top of the plywood is better pasted with linoleum or rubber mat to protect from oils. The aluminum sheet is simply screwed or attached to the profile.
Pay special attention soft-coated. Lying on bare metal or thin plywood is uncomfortable and cold. Use foam 20-30 mm thick with a density of at least 30 kg / m3, so that it does not crumple into pancakes in one season. On top, the foam is covered with a durable fabric, leather substitute or a special car eco-skin.
The fabric is pulled and fastened on the bottom side of the platform with a building stapler or glue. It is important that the material is resistant to technical fluids (gasoline, oil, brake fluid), otherwise it will have to be changed often. viniliskoge - an excellent choice, as it is easy to wipe with rags and does not absorb dirt.
For maximum comfort, make a removable mattress on Velcro. So you can remove it for cleaning or replacement if it gets dirty with oil, without disassembling the entire design of the sunbed.
Final assembly and additional improvements
At the final stage, gather all the nodes together and conduct a design revision. Check whether the frame is wobbly, whether the wheels are reliably held and whether the skin is flat. Many craftsmen at this stage add useful little things that turn a simple bed in a multifunctional tool for the garage.
One of the most useful improvements is the installation of the head restraint. It can be made from the pruning of the pipe, welded to the end, and sheathed with soft material. It is also not superfluous to organize a place for storing small tools: screw a magnetic tape for keys or a small plastic box for nuts and bolts.
⚠️ Attention: Do not overload the bed with heavy equipment. The design is designed for the weight of a person. Placing heavy parts (such as the cylinder head) on the edge of the platform can lead to rollover.
As an additional improvement, hooks can be installed on the sides for suspension of hoses or wires so that they do not get confused under the wheels. If you often work in dark places, consider mounting for a small LED light on the hinge.
A well-made bedside is paid off by comfort: you stop feeling back pain after 15 minutes of work under the car, which is allowed for repairs, not for finding a comfortable posture.
Safety rules and tool maintenance
Even the most durable tool requires the right handling. Before each use, visually inspect the wheels for wound threads or hair that may block rotation. Lubricate wheel bearings regularly, especially if you work in conditions of high humidity or dust.
When working under the car, always be aware of the risks. sliding-bed It is a means of transportation, not insurance. Never rely on a jack alone, use safety stands. If the car breaks down, the bedside can play a cruel joke, quickly rolling out of the car and leaving you without protection.
Keep the tool in a dry place, suspended on a wall or lying on a shelf so that the wheels do not deform from constant pressure. Periodically check the condition of the skin: a torn casing can cause dirt to get on the clothes or even trauma to the skin on the protruding foam.
Frequently Asked Questions (FAQ)
What is the maximum weight of a homemade bed?
When using a profile pipe 40x20 mm with a wall of 2 mm and high-quality industrial wheels, the design can easily withstand a load of up to 200-250 kg. This includes the weight of the person and the tools scattered. The critical element is usually not the pipes, but the mounting points of the wheels.
Can I build a bed without welding?
Yeah, it's possible. Instead of welding, bolt joints can be used through metal corners. However, such a frame will have more weight and dimensions due to the overlays. It is important to use high-strength bolts (Class 8.8 and above) and periodically check the puff, as the vibration of the threaded joints can weaken.
How to replace polyurethane wheels if they are not available for sale?
Alternatively, you can use wheels from office seats (if they are solid, not inflatable) or industrial rollers for carts. The main requirement is the presence of bearings inside. Conventional furniture wheels without bearings will quickly crumble under the weight of an adult.
Do I have to make the sides by the sunbed?
High sides are not recommended, as they will interfere with the freedom of movement of the hands during repair. A small elevation around the perimeter (2-3 cm) or simply a thickened edging is enough so that the tools do not roll down to the floor. The main task is a flat and smooth surface.