Building a private house or arranging a site often requires large volumes of concrete mortar, and buying finished concrete with delivery is not always economically justified. In such situations, the ideal solution is trailer-bagwhich can be towed by a normal passenger car. This equipment combines mobility, high productivity and the ability to work in hard-to-reach areas of the site.
Many owners of suburban areas mistakenly believe that to transport a concrete mixer, it is enough to simply put it in the trunk or fasten it on the roof, but this is not only inconvenient, but also dangerous. Specialized trailer-knot allows you to deliver the unit directly to the place of filling the foundation, avoiding the time-consuming rolling of a loaded wheelbarrow over rough terrain. In addition, modern models are often equipped with their own drive on wheels, which makes them independent of the tractor in the process of operation.
In this article we will analyze in detail the technical nuances of the choice of such equipment, consider the issues of legislation and give practical advice on operation. You will learn how to correctly calculate the load on the farcop of your car and what to look for when buying or self-assembling a structure. A competent approach to this issue will save you energy and money on the construction site.
Advantages of using trailer concrete mixers
The basic merit of use trailer-mixer It is about autonomy and mobility. Unlike stationary models, which require a rigid binding to the electrical connection point or the presence of long, tangled underfoot extension cords, trailer versions are often equipped with their own internal combustion engine. This allows you to work in a “clean field” where communications have not yet been carried out, which is critical in the initial stages of construction.
In addition, the presence of its own chassis with pneumatic wheels greatly simplifies logistics on the construction site. You do not need to waste time and physical effort rolling heavy equipment over dirt or rubble: you just pick up a concrete mixer loaded with solution to the farcope and move it to the desired point. This is especially true when filling the long-haul tape foundations, when the unloading point has to be constantly displaced.
⚠️ Note: Not all passenger cars are designed to tow heavy trailers with an active load on the breather. Before buying equipment, be sure to check the technical passport of your car, so as not to exceed the permissible weight of the towed cargo.
Another important aspect is the versatility of the design. Many manufacturers produce models that can be easily converted: remove the engine and wheels, turning the device into a stationary, or, conversely, install the chassis. This flexibility allows you to adapt equipment specific tasks of the current construction phase.
- 🚜 The ability to work away from power sources thanks to the ICE.
- 🏗️ High mobility and rapid transfer of equipment on the site.
- 💰 Saving time on the preparation of the workplace and the delivery of materials.
- 🛠️ Easy maintenance and availability of spare parts for popular models.
Technical characteristics and types of structures
When choosing a concrete mixer designed to be installed on the trailer device, the key parameter is the volume of the drum and the type of drive. The market offers models with a mixture volume of 100 to 500 liters, but for passenger cars, the optimal range is 160-250 liters. Larger units can put excessive strain on the car's frame when driving, especially on rough roads.
The design of the frame also plays an important role. Professional models are equipped with reinforced breathing with coupling ball type, corresponding to the standards of farcopes. Some versions have a rotary mechanism that allows you to change the angle of the drum in order to more conveniently unload the solution. It is important to pay attention to the material of wreath manufacture: cast iron options are cheaper, but steel gear (crown) lasts much longer and better withstands vibrations during transportation.
The influence of engine type on model selection
Gasoline engines are usually cheaper and easier to maintain, but diesel units are more economical and have more torque at low revs, which is important when mixing thick solutions. Electric models require a powerful 380V network or generator.
Special attention should be paid to the type of reducer. In trailer models, it is most often used crown-transferIt is easier to repair in the field. If the crown teeth wear or break, they can be replaced by turning the crown or buying a new spare part, whereas gear models require more complex maintenance.
| Parameter | Small models (up to 160 liters) | Medium models (180-250 l) | Heavy models (300+ l) |
|---|---|---|---|
| Engine power | 3.5 - 5.5 hp | 6.5 - 9.0 hp | 10.0+ hp |
| Equipment weight | 60 - 80 kg | 90 - 130 kg | 150 kg |
| Type of wheel | Transportation | Pneumatic (automatic) | Enhanced pneumonia |
| Pump load on the farcope | Minimum | Medium | High (requires inspection) |
Load calculation and compatibility with the vehicle
Traffic safety is the number one priority. Before purchasing or installing concrete-mixer On the frame, accurate calculations must be made. The total weight of the equipment, including the weight of the device itself, the engine, the frame and the total volume of concrete mortar, should not exceed the maximum vertical load on the farcop ball specified in the instructions for your car.
Usually for passenger cars, this parameter is from 50 to 100 kg statically, but when driving, dynamic loads can increase significantly due to road irregularities. If you plan to transport a concrete mixer filled with mortar (and 1 liter of concrete weighs about 2.2–2.4 kg), the total weight can easily reach 300–400 kg. In this case, using a standard dual-axle passenger trailer-platform will be safer than installing the unit directly on the breather.
The full weight of the train should also be taken into account. According to the traffic rules, category “E” rights may be required to drive a trailer with a mass exceeding 750 kg (if the total mass exceeds 3,500 kg), although category “B” is sufficient for most lightweight construction trailers. However, if the design is classified as bulk or has non-standard dimensions, special permits may be required.
⚠️ Attention: Dynamic load on the farcop when driving on a bad road can be 3-4 times higher than the static weight of the cargo. Never ignore the limits specified by the car manufacturer to avoid a torn off or body damage.
Installation of a concrete mixer on the trailer frame
If you decide to build the design yourself or upgrade the existing one, you will need a reliable metal frame. The base must be welded from the profile pipe by a cross section of at least 40x40 mm or 50x50 mm. The key element is the correct positioning centre: it should be slightly ahead of the wheel axis of the trailer to ensure steady movement and not overload the rear of the car.
Mounting the concrete mixer itself to the frame should be carried out through vibroisolating gaskets made of dense rubber. This is necessary in order to extinguish the vibrations of the working engine and the rotating drum, preventing the destruction of the welded seams of the frame and the fatigue destruction of the metal. Bolt connections should be tightened using growers or carving fixers.
☑️ Installation checklist
For models with an internal combustion engine, it is important to provide an efficient exhaust system. The exhaust pipe should be directed away from the operator and should not rest on the frame or wheel elements to avoid overheating of the rubber and smoke of the working area. It is also recommended to install a protective cover above the engine to protect against rain and falling objects.
Use threaded studs with counternuts for mounting the engine - this will allow you to quickly remove the unit for maintenance or replacement, if necessary, without resorting to welding or Bulgarian.
Rules for safe operation and transportation
Exploitation squirt-mixers It requires strict safety regulations. It is strictly forbidden to transport the unit with the remains of frozen concrete inside the drum - this will lead to imbalance and breakage of the gearbox. Before each movement, the drum must be thoroughly washed with water.
When driving on public roads, the speed should not exceed 40-60 km / h, even if the trailer technically allows you to go faster. Sharp maneuvers, braking and turning can lead to a structure rolling over due to the high center of gravity of the fluid in the drum. Always use safety circuits connecting the trailer to the car body in case the coupling hook is pulled off.
Particular attention should be paid to the condition of the wheels. Since a concrete mixer often works in construction conditions where there are many sharp objects, the probability of puncture is high. The presence of a spare wheel and a remix for a pneumatic wheel is a mandatory requirement for long trips to the facility.
- 🛑 Always lock the drum with a stopper before starting movement.
- 🔦 Install position lights and catafos on the trailer structure.
- 🧼 Regularly lubricate the bearing assemblies of the wheels and the crown gear.
- ⛽ Keep an eye on the engine oil level before each start.
Legal aspects and requirements of the SDA
The use of homemade or modified trailers is regulated by the Technical Regulations of the Customs Union. If you make a trailer yourself, for legal use on public roads, it must undergo a certification procedure or have documents from the frame manufacturer. The use of an unregistered trailer may result in a fine and evacuation of the vehicle.
It is important to distinguish between “equipment” and “vehicle”. If a concrete mixer is mounted on a frame with wheels and is designed to be towed along roads, it legally becomes a trailer. This means the need to register with the traffic police, obtain a license plate and have insurance (if the weight of the trailer exceeds 750 kg, although the rules may change, so the current information should be specified in local offices).
⚠️ Note: The legislation in the field of registration of special equipment and trailers may change. Before leaving for public roads, make sure that your design meets the current requirements of GOST and has the necessary permits.
Registration is not required for work on a private territory (construction site, cottage), but the safety requirements for the design remain the same. Owners should understand that in the event of an accident or harm to third parties using an unregistered device, liability may be significantly higher.
Legalization of homemade trailer is possible through the certification procedure of a single instance, but it is easier and cheaper to purchase a certified frame-based from the manufacturer.
Frequently Asked Questions (FAQ)
Do I need an E category license to tow a concrete mixer?
Category "E" is required if the total mass of the trailer exceeds 750 kg and the total mass of the vehicle with the trailer exceeds 3,500 kg. For lightweight construction trailers weighing up to 750 kg, category B is usually sufficient, but always check the documents for a specific vehicle.
Can I tow a concrete mixer with a solution inside?
It's not recommended. Liquid concrete creates the effect of a “liquid pendulum”, which dramatically reduces the stability of the trailer on corners and can lead to rollover. Only an empty or thoroughly washed concrete mixer should be transported.
Which engine is better to choose: gasoline or electric?
For mobile trailer models that will be used away from the power grid, the choice is not an alternative. petrol-engine. Electrical options are only suitable for stationary work or in the presence of a powerful generator, which increases the total weight and cost of the kit.
How often should I change the crown on a concrete mixer?
The resource of the crown depends on the intensity of work and care. With regular lubrication and the absence of overloads, the cast-iron crown serves 2-3 seasons of active construction, steel - much longer. A sign of wear is noise, vibration and slipping of the gear.