Powerful RC Construction Equipment Working Video-“RC Articulated dump truck 1”-RC Hydraulic Crawler Excavator, RC Loader, RC Hydraulic Articulated Dump Truck, RC Bulldozer.
Powerful RC Construction Equipment Scale Model Working Video, Construction Vehicle, Engineering Vehicles, RC Heavy Machinery, RC Hydraulic Crawler Excavator, RC Loader, RC Hydraulic Articulated Dump Truck, RC Bulldozer, RC Heavy-duty Vehicles, Earthwork Operations Equipment, Earthmoving Equipment, RC Articulated dump truck 1.
RC Articulated dump truck 1
Heavy equipment or heavy machinery refers to heavy-duty vehicles, specially designed for executing construction tasks, most frequently ones involving earthwork operations or other large construction tasks. Heavy equipment usually comprises five equipment systems: implementation, traction, structure, power train, control and information.
Heavy equipment has been used since at least the 1st century BCE when the ancient Roman engineer Vitruvius described a crane in De architectura when it was powered via human or animal labor.
Heavy equipment functions through the mechanical advantage of a simple machine, the ratio between input force applied and force exerted is multiplied, making tasks which could take hundreds of people and weeks of labor without heavy equipment far less intensive in nature. Some equipment uses hydraulic drives as a primary source of motion.
The term “plant” is used to refer to any mobile type of heavy machinery.
The use of heavy equipment has a long history; The ancient Roman engineer Vitruvius (1st century BC) described the ancient Roman heavy equipment and cranes in his paper architecture. The pile driver was invented around 1500. The first tunnel shield was patented by Marc Isambard Brunel in 1818.
From horse to steam and diesel to electric and robot
Heavy equipment around 1922
Digging water supply ditch with scraper in marafresno
Until the 19th century and the beginning of the 20th century, heavy machinery was pulled by human or animal forces. With the advent of portable steam powered engines, the predecessor of traction machines has been reconfigured to new engines, such as combine harvesters. The design of the core tractor has evolved from a new steam power source to a new core traction engine, which can be configured as steam tractor and roller. In the 20th century, internal combustion engine has become the main power source of heavy equipment. Kerosene and ethanol engines are used, but today diesel engines dominate. In many cases, mechanical transmission is replaced by hydraulic machinery. At the beginning of the 20th century, new electric machines appeared, such as forklifts. Caterpillar is a modern brand, starting with Holt manufacturing. The first heavy-duty machine to be mass-produced was the foterson tractor of 1917.
The first commercial continuous track vehicle was Lombard steam log hauler in 1901. During the first World War, the use of crawler was very popular in tanks, and later used in bulldozers and other civil machinery. The largest construction vehicles and mobile land machines are bucket wheel excavators built since the 1920s.
“It wasn’t until almost the 20th century that a simple tool made up the main earth moving machinery: hand shovels – moving with animals and people, sledges, barges and trucks. This tool is the main way to roll or lift the loading material. It is a vehicle, usually a cart, or a cart or truck pulled by livestock. In ancient times, tools equivalent to shovels or hoes and Baskets – and a large number of people – were used to carry earth for civil engineering. For a long time, builders have used ramps, levers and pulleys to place solid building materials. However, these labor-saving devices are not suitable for earthwork. They need to excavate, lift, move and place loose materials. At that time, as now, the two elements needed for mechanized earthwork were independent power source and off-road mobility, neither of which could be provided by the technology at that time. “[ 2]
Container crane has been used since 1950s, which makes containerization possible.
Now that’s the importance of this kind of machinery, some transportation companies have developed specific equipment to transport heavy construction equipment to and from the construction site.
Most major equipment manufacturers, such as Caterpillar,  Volvo,  Liebherr,  and Sm, have released or are developing fully or partially electric heavy equipment. Commercial and R & D models are announced in 2019 and 2020[ 6]
As manufacturers begin to research and acquire technologies, robotics and autonomy have always been a growing concern for heavy equipment manufacturers[ 7] Many companies are currently developing (caterpillar and Bobcat) or have launched (built-in robot) commercial solutions to the market.
Excavators are heavy construction equipment consisting of a boom, dipper (or stick), bucket and cab on a rotating platform known as the “house”. The house sits atop an undercarriage with tracks or wheels. They are a natural progression from the steam shovels and often mistakenly called power shovels. All movement and functions of a hydraulic excavator are accomplished through the use of hydraulic fluid, with hydraulic cylinders and hydraulic motors. Due to the linear actuation of hydraulic cylinders, their mode of operation is fundamentally different from cable-operated excavators which use winches and steel ropes to accomplish the movements.
Modern hydraulic excavators come in many sizes. The smaller ones are called small or compact excavators[ 7] Caterpillar’s smallest micro excavator, for example, weighs 2060 pounds (930 kilograms) and has 13 horsepower; Their largest model is the largest excavator (developed and produced by Orenstein & Koppel, Germany, until it was acquired by caterpillar in 2011, named rh400 ), cat 6090, weighing over 2160510 pounds (979990 kg), with 4500 horsepower and a bucket up to 52.0 cubic meters.
Hydraulic excavators usually connect engine power to (usually) three hydraulic pumps instead of a mechanical transmission system. Two main pumps supply oil to the arm, swing motor, crawler motor and accessories at high pressure (up to 5000 psi, 345 bar), while the third is a low pressure (~ 700 psi, 48 bar) pump for pilot control of the spool valve; This third circuit can reduce the manual labor when operating the control. Generally speaking, the three pumps used in excavators are composed of two variable displacement piston pumps and one gear pump. The arrangement of pumps in the excavator unit varies with different manufacturers using different formats.
The three main parts of an excavator are the landing gear, the house and the boom (which also uses the boom). Landing gear includes crawler, crawler frame and final drive. They have hydraulic motor and transmission device to provide driving force for each crawler. The landing gear can also have blades similar to those of a bulldozer. The house includes the cab, counterweight, engine, fuel and hydraulic tank. The house is attached to the landing gear by a central pin. The high pressure oil is supplied to the hydraulic motor of the crawler through the hydraulic rotating device on the pin shaft, so that the machine can rotate 360 ° without obstruction, thus providing left and right movement[ 8] The arm provides up and down and further (or digging) movement. The arm is usually composed of boom, stick and bucket, which have three joints with the house.
The boom connects to the house and provides up and down movement. It can be one of several different configurations:
The most common is one arm; They don’t move except straight up and down.
Others have a steering knuckle arm that can also move left and right with the machine[ Need clarification]
Another option is the hinge at the bottom of the boom, which can rotate 180 ° hydraulically independent of the house; However, this usually only applies to compact excavators.
The variable angle boom has an additional joint in the middle of the boom to change the curvature of the boom. These are also called three hinged hangers (TAB) or three piece hangers.
Attached to the end of the boom is the stick (or bucket arm). The stick provides the digging movement required to pull the bucket across the ground. Stick length is optional, depending on whether extension (longer stick) or explosive force (shorter stick) is required. The most common is a single rod, but there are also telescopic rods, for example.
The end of the stick is usually a bucket. A large capacity (mud) bucket with a wide, straight blade is used to clean areas where leveling or digging materials are soft and do not need teeth. General purpose (GP) buckets are usually smaller, stronger, and have hardened side cutters and teeth for breaking through hard ground and rock. Buckets are available in a variety of shapes and sizes for a wide range of applications. There are many other accessories that can be connected to the excavator for drilling, tearing, crushing, cutting, lifting, etc. Accessories can be connected by pins similar to other parts of the manipulator or some types of quick couplings. Scandinavian excavators are usually equipped with tilt rotators that allow the attachment to rotate 360 degrees and tilt + / – 45 degrees to improve the flexibility and accuracy of the excavator.
A loader is a heavy equipment machine used in construction to move or load materials such as soil, rock, sand, demolition debris, etc. into or onto another type of machinery (such as a dump truck, conveyor belt, feed-hopper, or railroad car).
There are many types of loader, which, depending on design and application, are variously called a bucket loader, front loader, front-end loader, payloader, high lift, scoop, shovel, skip loader, wheel loader, or skid-steer.
Loader is a kind of tractor, usually wheeled, sometimes on the track, it has a front wide bucket, connected to the end of two boom (boom), used to scoop up loose material from the ground, such as soil, sand or gravel, and move it from one place to another without pushing the material across the ground. Loaders are usually used to move stored materials from the ground and store them in waiting dump trucks or open ditches.
Loader components can be removable accessories or permanently installed. Often buckets can be replaced by other equipment or tools – for example, many can be forked to lift heavy pallets or shipping containers, and hydraulically opened “clamshell” buckets allow loaders to act as light bulldozers or scrapers. Buckets can also be added with equipment, such as a bag grabber for handling large bales of hay or straw.
Large loaders, such as Kawasaki 95zv-2, John Deere 844k, ACR 700k compact wheel loader, caterpillar 950h, Volvo l120e, case 921E or Hitachi zw310, usually have only front bucket, which is called front loader, while small loader tractors are usually equipped with small backhoe, which is called backhoe loader or loader backhoe or JCB, Named after the company that first claimed to have invented them. Other companies, such as case in the United States and Whitlock in the United Kingdom, have made excavator loaders long before JCB.
The largest loader in the world is the Letourneau l-2350. At present, these large loaders are being manufactured in Longview, Texas. The l-2350 uses a diesel electric propulsion system similar to that used in locomotives. Each rubber tire is driven by its own independent motor.
Loaders are mainly used for loading materials into trucks, laying pipes, clearing debris and digging. The loader is not the most efficient digging machine because it cannot dig as deep below its wheel level as a backhoe or excavator can. The capacity of the loader bucket can range from 0.5 to 36 m3 , depending on the size of the machine and its application. The bucket capacity of a front loader is usually much larger than that of a backhoe loader.
Unlike most bulldozers, although crawler loaders are common, most loaders are wheeled rather than tracked. Their sharp edged material in building debris can damage rubber wheels or make the ground soft and muddy. The wheels provide better mobility and speed, do not damage the paved road as the track does, but provide less traction.
In the field of construction, loaders are also used to transport building materials such as bricks, pipes, metal rods and digging tools over short distances.
Front loaders are usually used to remove snow, especially from sidewalks, parking lots and other areas too small to use snow sweepers and other heavy equipment. They are sometimes used as snow sweepers with snow sweeper accessories, but usually have a bucket or snow basket, and can also be used to load snow into the back compartment of a snow sweeper or dump truck.
The high point bucket is suitable for light materials such as debris, peat and light gravel and when the bucket is emptied from high.
Close up of articulated steering
Unlike backhoes with front buckets or Standard tractors, many large loaders do not use automotive steering. Instead, they are steered by hydraulically driven pivot points set precisely between the front and rear axles. This is known as “articulated steering” and allows the front axle to be strong enough to carry more weight. Articulated steering provides better mobility for a given wheelbase. Since the front wheels and accessories rotate on the same axis, it is useful for the operator to be able to “guide” his load in an arc after positioning the machine. The trade-off is that when the machine is “twisted” to one side and the weight is raised, it has a greater risk of turning to the “wide” side.
Front loaders have become more and more popular in the past two decades, especially in urban engineering projects and small-scale earthwork. Heavy equipment manufacturers offer a wide range of loader sizes and tasks.
The term “loader” is also used in the field of debris removal to describe the boom on a grab truck.
The main components of loader are engine (diesel in almost all cases), hydraulic components (such as pump, motor and valve) and transmission components (gearbox, axle, wheel / track, pump, motor, etc.) The engine operates both the hydraulic system and the gearing, which in turn move the front attachments (bucket, fork, sweeper, etc.) to manipulate the material being processed, and the wheels or tracks to move the machine around the site.
Volvo Construction equipment company invented the first wheel loader in 1954, which is called H10[ 2] At the time, it was tractor based and had rear wheel drive. Today’s wheel loaders are articulated, with the rear and front wheels of the same size.
Armored wheel loader
IDF armored wheel loaders
The Israeli combat Engineering Corps uses armored caterpillar 966 wheel loaders to carry out construction and combat engineering tasks in military occupied areas such as the West Bank. They are often seen to build or remove roadblocks and build bases and fortifications. They have also been used to demolish small houses since 2005. The IDF added armor plates to the loader to protect it from rocks, stones, incendiary bombs and light gunfire.
Batalh à ode opera à ? es politicis especiais (BOPE), the elite police unit of Rio de Janeiro, has purchased a wheel loader designed for military use to open up and give way to police in Rio’s slums, which are controlled and blocked by drug traffickers[ 3 ]
Several, if not most, countries have similar equipment. For example, the Dutch armed forces use a model like werklust wg18edef, which weighs 15 tons, two tons more than the corresponding non armored civilian model. In addition, the Dutch military previously used additional armor modules to cover most of the window surfaces with steel to provide additional protection. However, due to poor visibility, these are not welcomed by the crew.
The Turkish army and Turkish police used the remote-controlled armored wheel loader tosun during the construction of the Syrian Turkish barrier, operation Euphrates shield, operation Idlib shield and operation olive branch.
Tractor front loader
These loaders are a popular complement to 50 to 200 horsepower tractors. Its current “drive in” form was originally designed and developed by a Swedish company named ? L ü in 1958 when it launched the quick loader[ 5] Tractor loaders have been developed to perform a variety of agricultural tasks and are popular due to their relatively low cost (compared with telehandler) and high usability. Tractor loaders can be equipped with a number of accessories, such as hydraulic grabs and spikes, to assist in handling bales and silage, forks for pallet work, and buckets for more general farm activities. Industrial tractor loaders equipped with box graders are sold to contractors as tipper loaders.
Compact front end loader
In the 1940s, Abram Dietrich Thiessen of eyebrow Saskatchewan built the first quick connect front-end loader. International Harvester’s photographed the loader and reproduced it in Regina agribition in November of the same year.
Semi curved compact loader on John Deere compact multifunction tractor
Visibility comparison of different loader designs
Front end loader (FEL) is a popular supplement to compact multifunctional tractors and agricultural tractors. Compact multifunction tractors, also known as cut, are small tractors, usually with 18 to 50 horsepower (37 kW), mainly used for ground maintenance and landscape chores. Compact tractor FEL has two main designs, the traditional dogleg design and the curved arm design.
John Deere’s semi curved loader design does not have an integral bending arm, nor is it a traditional two-piece design. New Holland has launched compact loaders with integral bent arms on its compact multi-purpose tractors, which are now available on many brands of compact tractors, including Case IH / Farmall and some Montana and kioti tractors. Kubota sells traditional loader designs on most of its compact tractors, but now uses a semi curved loader design similar to the John Deere loader design on several of its small tractors.
Although front end loaders on cut size tractors can perform many tasks, they are relatively smaller and have lower capacity than commercial loaders, so compact loaders can become more useful with simple options. A toothed bar is usually added to the leading edge of the loader bucket to help with digging. Some loaders are equipped with a quick coupler, also known as a quick connect (QA) system. The QA system allows easy removal of the bucket and addition of other tools in its position. Common accessories include a set of pallet forks for lifting cargo pallets or a set of spears for lifting hay bales.
The LHD (loading, towing, dumping machine) is also a front-end loader, but is designed for compact mine conditions, can handle a variety of loads with different bucket sizes, and can be driven by electric motors and diesel engines.
Caterpillar 740 Ejector going up an incline
An articulated hauler, articulated dump truck (ADT), or sometimes a dump hauler, is a very large heavy-duty type of dump truck used to transport loads over rough terrain, and occasionally on public roads. The vehicle usually has all-wheel drive and consists of two basic units: the front section, generally called the tractor, and the rear section that contains the dump body, called the hauler or trailer section. Steering is made by pivoting the front in relation to the back by hydraulic rams. This way, all wheels follow the same path, making it an excellent off-road vehicle.
Manufacturers include Caterpillar, Terex, John Deere/Bell Equipment, Moxy/Doosan, Volvo CE, and Komatsu Limited. With half of the global sales, Volvo is the market leader in the segment, and is also the prime pioneer of the vehicle, enabling its introduction to the markets in 1966.
Although first envisioned as a soil and aggregate transporter (dumper), the chassis have since been used for many other applications include agriculture, mining, construction and highway maintenance. Ranging from concrete mixer, water tanker and container truck, over to upsize off-road semi-trailer hauler (on-road applications), hook loader or crane, as well as used to transport timber and as a woodchipper platform. Its chassis have also been used for military purposes given that it only is surpassed by tracked vehicles in off-road capabilities. An example is the Archer Artillery System.
In 1955, lihnells vagn AB (livab), a tractor trailer manufacturer of the Swedish company, began to cooperate with Volvo BM (future Volvo CE), a tractor subsidiary of Volvo, to develop special dump trucks. This is essentially a trailer, its power shaft is used with agricultural tractors, and its power output shaft is used to drive the trailer’s shaft. These are not articulated trucks in the modern sense because the tractor retains the front axle to provide steering[ 3]
With the deepening cooperation between the company and Volvo BM, it began to try to get rid of the front axle by permanently connecting the trailer, but to provide steering through the hydraulic cylinder, forcing the trailer and the truck to rotate relative to each other. This is similar to the system that has been developed for tandem tractors (see e.g. doe triple-D). The first specially manufactured articulated truck was Dr 631, a 4×4, which was released in 1966,  the larger 6×6 model Dr 860 was released in 1968. Livab was incorporated into Volvo BM in 1974.
Volvo a25 4×4 in highway tunnel project of Czech Republic
Meanwhile, another swedish company, Kockum landsverk AB, has developed a very similar vehicle. With a similar tractor derivative design, it launched its first articulated 4×4 dump truck in 1967, named KL 411, which was replaced by a similar size 6×6 named KL 412 in 1973. The company competed with Volvo BM until it was acquired by its larger competitor in 1982.
Early articulated transporters were sturdy, had no suspension, and had a manual transmission. This makes them uncomfortable, noisy and demanding to drive and causes operator fatigue. In addition to the inherent suspension of large tires, the lack of suspension also brings pressure to the transmission system and chassis, making it unsuitable for high-speed operation and frequent maintenance. The top speed is only 30 km / h. Many of these concerns have been dispelled over the years. In 1979, Volvo BM 5350 introduced the front suspension to solve the driver’s problem. The model also introduces an automatic transmission instead of a tractor derived cab, a newly designed cab.
The first ADT, tournatailer, was built in 1938, based on A-type tournapull, and then C-type tournapull in 1940. At the same time, Letourneau Australia has built a bull shaped dump truck body for use behind the Australian tournapull, which is tournarocker. After the war, Le tourneau set out to design a stronger articulated rear dump truck, which he named tournarockers.
Around 1950, Athey launched its two axle at-15 articulated tractor.
As a result of developments in brakes, differentials and other aspects of the drive system to improve speed, availability and reliability. 2007 Volvo CE a35e / a40e is equipped with full suspension (meaning all three movable axles are now equipped with suspension). Volvo truck allows each of the three solid axles to move and twist independently of the other two, so it is called “independent suspension” in its marketing materials, although it still uses solid axles, which is different from the independent suspension in cars. Since then, others have followed suit.
The remaining features of its agricultural tractor heritage are operator location and basic layout. As a result, the driver sits behind the engine, above the transmission and front drive axle. The permanently attached trailer cannot move vertically relative to the tractor, but can rotate and swing in a horizontal plane. The operator has a traditional steering wheel that activates the hydraulic cylinders to push and pull the tractor relative to the trailer. The tractor and trailer parts can move at a large angle to each other, so as to achieve a small turning radius.
The trailer shaft is driven by a drive shaft that extends from the rear of the gearbox with splines and universal joints to accommodate movement between them. All axles are door type with hub deceleration and locking differential. Initially, the axle differential was permanently locked, but recently some models can operate with an open but lockable differential for better high speed capability. The usual combination of dual rear axles is in a separate frame that can pivot relative to the “trailer” frame, keeping all wheels on the ground, but until recently it was always not suspended (referred to as a “bogie”). Similarly, less common trucks with a single rear axle usually have no spring load at the rear and a suspension at the front axle to provide a better driving experience for the operator. Sometimes the reinforced cab pops up, just like the modern cab engine truck, so does the driver’s seat.
These parts can twist each other and turn the vehicle in such a way that the rear tires follow the same path as the front tires, and combine with all wheel drive to provide excellent off-road capability. The maximum speed is limited to 55-60 km / h (the maximum road speed of the uncontrolled Archer system is “at least 70 km / h”); But this will come at the cost of fuel economy and mechanical wear and tear, and will significantly exceed the standard speed of the military fleet , with a net load ranging from slightly less than 25 tons to slightly more than 40 tons.
Comparison with rigid dump truck
See also: Trailer
Articulated trucks are good at handling materials in rugged terrain, such as swamp, swamp, swamp. They are rugged and designed for large slopes and slippery conditions. This is their main advantage over rigid transport vehicles with excellent carrying capacity. Articulated trucks have a load capacity of no more than 55 tonnes, and some rigid trucks (with conventional front steering and rear wheel drive) can carry up to 310 tonnes, such as the belaz 7550[ 5] The 7550 model has been in production for five years and is actually a prototype. The payload capacity of EH 5000 is 326 tons, which is one ton less than that of Komatsu 960e-1.
This can also be seen from the way they are used. Rigid trucks are most suitable for use in large open pit mines and large quarries, where there is sufficient space and hard horizontal surface for driving, while articulated trucks are most suitable for use in rugged and narrow sites, such as large construction sites.
The relatively small size of articulated trucks also enables them to travel on public roads between different sites of large construction projects – which is not possible for the largest trucks, and may even require disassembly to move between locations. For the transportation between different construction projects, due to its limited width, weight and speed, articulated transport vehicles usually have to be transported as oversized goods on flat trailer. In practice, however, it is normal for most articulated trucks to be towed between construction sites, as few construction sites have the opportunity to drive on public roads between construction sites, depending on the size of the machines (chassis, wheels, etc.) And local law, it can also be illegal. For any distance greater than a few miles, it will also be considered uneconomic wear and tear on transport trucks, as the time spent on these trucks does not contribute to the payment work. Use trucks and trailers and let them do what they’re good at, road transport, more efficient, faster.
Volvo Construction Equipment
Volvo Construction Equipment – Volvo CE – (originally Munktells, Bolinder-Munktell, Volvo BM) is a major international company that develops, manufactures and markets equipment for construction and related industries. It is a subsidiary and business area of the Volvo Group.