Commercial transport, combining the capabilities of a truck and a lifting mechanism, is an indispensable tool for modern business. Special cargo onboard equipped with a crane manipulator (CMU) allows loading and unloading without the involvement of third-party equipment. This significantly reduces downtime and reduces the cost of logistics processes.
The choice of such a complex requires a deep understanding of the technical characteristics and operating conditions. Errors in the planning phase can lead to the fact that an expensive machine will not be able to solve the tasks or will have a critical advantage. In this article, we will discuss in detail all aspects, from the selection of the chassis to the nuances of equipment installation.
The combination of the side and the manipulator creates a unique synergy, allowing you to transport cargo and independently manage them. However, like any complex equipment, CMU requires a competent approach to maintenance and operation. Understanding the physics of arrow work This is the key to the safety and durability of your car.
Design features and types of CMU
The basis of any installation is a hydraulic system and a boom. These are the elements that determine the capabilities of the machine. There are two main types of structures: cable and hydraulic. Cable manipulators They usually have a large boom outlet and payload capacity, but they are more difficult to maintain and require regular replacement of cables.
Hydraulic models, in turn, are compact and high speed. They are ideal for working in crowded urban environments. The choice between these types depends on the specifics of your business. If you need to lift heavy blocks to a higher height, a cable option will be preferable.
The most important parameter is the loading time. It is calculated as the product of the mass of the cargo for the departure of the arrow. When choosing equipment, they often make a mistake, looking only at the maximum load capacity. The maximum weight of 7 tons is only available with a minimum departure, and on full departure it can be only 1-2 tons.
- 🏗️ CUC cable: They differ in large arrows and the ability to lower the load below the level of the supporting surface, which is indispensable when working in pits.
- ⚙️ Hydraulic CMU: Compact, have a high speed of rise and fall, convenient for frequent overloads at short distances.
- 📐 Telescopic arrows: Allows you to change the length of departure, providing flexibility in working with different types of cargo.
⚠️ Warning: Never attempt to lift cargo exceeding the passport carrying capacity on this departure. This can lead to a car rolling over or arrow breaking, even if the visual load seems small.
Modern models are often equipped with additional options such as swivel grippers or grapples. This turns a conventional truck into a multifunctional complex. For example, installation rotator (rotating device) allows you to deploy the load around its axis, which is critical when installing structures.
Choice of chassis and calculation of load capacity
The base chassis is the foundation on which the entire structure rests. For installation of CMU used cars of various classes, from light commercial Isuzu NQR heavy KAMAZ or MAN. The main task in choosing is to distribute the weight correctly. The weight of the manipulator, brackets and cargo transported should not exceed the permitted technical characteristics of the car.
Particular attention should be paid to the total weight of the car and the load on the axles. Installation of heavy CMU behind the cabin shifts the center of gravity. If you do not conduct a competent calculation, the front axle can be overloaded in empty condition, and the rear - inefficiently use its resource when the board is fully loaded. Distribution of masses This is not only a matter of saving tire life, but also of road safety.
When choosing a side, it is important to consider its length and material. For light manipulators, aluminum boards are often used, which save several hundred kilograms of payload. For heavy work, a steel board with a reinforced spanger is required. The length of the platform also affects the departure of the boom: the longer the side, the farther from the cabin you can place the load.
| Chassis class | CUM (t) capacity | Examples of models | Scope of application |
|---|---|---|---|
| Light (up to 3.5 t) | 1.0 - 3.0 | GAZelle Next, Hyundai HD78 | Delivery of construction materials, small loadings |
| Medium (up to 10 t) | 3.0 - 7.0 | Isuzu NQR, Hino 500, GAZN Next | Public utilities, installation of equipment |
| Severe (up to 20+ t) | 7.0 - 25.0+ | KAMAZ-65115, Ural, MAN TGS | Construction, logging, industry |
It is important to take into account the climatic conditions of operation. For the northern regions, installation of a hydrosystem with oil heating and the use of frost-resistant hydraulic fluids are required. Otherwise, the equipment can fail at the first serious frost. Climate adaptation It extends the life of the car for years.
When ordering the chassis for the installation of CMU, immediately require a reinforced frame and increased battery capacity. The standard parameters are often insufficient for the operation of powerful hydraulics.
Installation of CMU: stages and technical requirements
Installation of crane-manipulator installation is a complex engineering process that cannot be performed “by eye”. The first step is always the design. Engineers calculate the installation point of the brackets to ensure maximum stability. Incorrect installation can lead to deformation of the frame or even its fracture in the process of work.
The installation process begins with the dismantling of the regular body (if any) and the preparation of the seat. The frame is cleaned, anti-corrosion treatment is carried out. Then additional spars or reinforcing inserts are installed. This is a critical stage, as these elements take the main load from the work of the arrow.
- 🔩 The brackets are attached: It is carried out using high-strength bolts or by welding, depending on the frame design and the requirements of the manufacturer of the CMU.
- 💧 Installation of the hydraulic system: Includes installation of a hydro tank, pump (COM), distributors and laying of high pressure hoses.
- 🔌 Electrical equipment: Connecting control panels, pressure sensors and safety systems to the vehicle’s on-board network.
After mechanical assembly, the hydraulics are adjusted. The pressure in the system is regulated, the tightness of the connections is checked. Particular attention is paid to the work of safety valves. They must be operated clearly when the permissible loads are exceeded, preventing accidents.
⚠️ Attention: It is strictly forbidden to weld CMU brackets directly to the frame spars without prior calculation and amplification. This creates stress concentration points leading to rapid metal destruction of the frame.
The final stage is testing and testing. The manipulator must go through a cycle of climbs on and out. Only after successful completion of the tests is issued a passport and certificate of conformity. Certification This is a legal proof of the safety of your vehicle.
☑️ Post-installation check of the CMU
Operation and safety
Safety when working with CMU is in the first place. The operator must clearly understand that the manipulator is not a toy, but a source of increased danger. Before the start of the work is necessarily carried out visualization tech. The cables are checked for pile ruptures, hydraulic hoses for scuffs and the condition of the support legs (outrigers).
Installation of the car on the supports is a prerequisite for working on a full departure. Even if the load seems light, neglecting outriggers can lead to the car rolling. On soft ground, special linings (shoe) are necessarily placed under the paws to increase the area of the support and prevent failure.
There is a concept of a “dead zone” – a space where the operator does not see the cargo when working. In such cases, the help of a signaler is required. The commands are given clearly and unambiguously. The screaming and the turmoil around a working machine is unacceptable. Discipline on the court It saves lives.
The wind is another enemy of the manipulator. With a strong gusty wind, the area of sailing cargo can play a cruel joke, pulling the arrow to the side. The operating instructions usually limit operation in winds above 10-15 m/s. Ignoring this rule is a direct path to an accident.
What do you do when you break the rope?
If there is a break in the cable, immediately stop work, turn off the engine and install the car on the parking brake. Do not try to catch falling weight or cable with your hands. Call a repair team to replace the item.
Maintenance and typical malfunctions
Regular maintenance is the key to the long service of the CMU. The hydraulic system is sensitive to the purity of the oil. The ingress of water or metal shavings can disable the pump and distributors. Replacement of filters and oils should be carried out strictly according to the regulations specified in the product passport. This is usually every 500-1000 hours.
A typical problem is heating the hydraulic oil. If the system operates at temperatures above 80 degrees, the oil loses its properties and seals begin to break down. The reasons can be different: clogging of the radiator, valve failure or work at the limit of possibilities. Temperature monitoring It's mandatory.
Articulated elements require regular lubrication. The lack of lubrication in the fingers and bushes leads to rapid wear and the appearance of backlashes. Luft in the arrow is not only the inaccuracy of positioning, but also the risk of destruction of the structure under load. You need to lubricate every 8-10 hours of work.
- 🛢️ Oil replacement: Use only manufacturer-recommended brands of hydraulic fluids (usually HLP 32 or 46).
- 🔧 Fastening lift: Vibration when working weakens bolt connections, periodic checking of the moment of tightening is required.
- 👀 Defective of the RVD: High pressure sleeves have an expiration date and must be replaced when swelling or cracks appear, even if they do not flow.
Particular attention should be paid to the state of the turning mechanism. Sliding or rolling bearings in a rotary column are experiencing tremendous loads. The appearance of knocks or jerks when turning signals the need to adjust or replace bearings.
Timely replacement of filters and control of purity of hydraulic oil prolong life of the pumping group by 2-3 times, saving considerable money for repairs.
Legal aspects and registration in the traffic police
Installation of the CMU on the truck is a change in the design of the vehicle (VKTS). According to the technical regulations of the Customs Union, such changes must be legalized. Operation of the car without the relevant documents threatens with a fine and the setting of the car for the parking lot.
The legalization process begins with the receipt of a preliminary report in an accredited laboratory. Then there is installation in a certified center, which will issue a declaration and copies of certificates for equipment. After that, the car passes technical expertise and receives a certificate of safety of the design (SBKTS). Only with this document you can go to the traffic police to make changes to the STS and PTS.
It is important to understand that homemade brackets or handmade manipulators will not pass the examination. All components must have certificates of conformity. Legal purity This is a guarantee that your business will not get up because of one check on the road.
Do I need to get a license from Rostekhnadzor for the CMU?
According to the current rules, cranes-manipulators mounted on a car chassis are not subject to registration in Rostekhnadzor and do not require annual inspection if they are used by the owner for his own needs. However, if the CMU is leased with an operator, the rules may differ. Always check the relevance of the legislation.
Can I drive with an arrow raised?
Transportation of a car with a raised arrow of the CMU is prohibited by traffic rules and operating instructions. The arrow must be securely fixed in the transport position. Movement with a raised arrow creates a threat of collapse of power lines and size limitations.
How often do I need to go through a car inspection with CMU?
The frequency of the inspection depends on the age and type of vehicle, not on the availability of attachments. However, when passing the TO diagnostic card may contain the presence of special equipment. The main requirement is the serviceability of all systems of the car and CMU.
What to do if the weight of the car has changed after the installation of the CMU?
If after installing the manipulator, the total weight of the car exceeded the allowed for this category or model, it is necessary to undergo the procedure of re-registration in the traffic police as "making changes to the design". The new maximum mass allowed will be indicated in the documents. Driving such a car requires rights of the appropriate category.