Common excavator structures include power unit, working device, slewing mechanism, control mechanism, transmission mechanism, walking mechanism and auxiliary facilities. The working device is a device that directly completes the excavation task. It is hinged by three parts: boom, stick and bucket. The boom take-off and landing, stick telescopic and bucket rotation are all controlled by reciprocating double acting hydraulic cylinders. Standard excavators usually have 11 joint pivot pins, which are distributed on the boom, stick and bucket. According to the installation position, There are bucket pins, arm pins, arm cylinder pins, coupling pins of boom and arm, boom cylinder pins and boom pins. The pivot pin at the bottom of the boom is usually the longest pin. Except for the top pin of the boom cylinder, the cylinder pin of other parts are relatively short. Usually, the top pin of the boom oil cylinder does not have a plate. It has a bolt hole at both ends or three screw holes on both side surfaces In addition, the pins in other positions basically have plates, and the types of plates of different brands are different.

The 2021 global top 50 construction machinery manufacturers list shows that the total sales of the top 50 companies are 191.5 billion U.S. dollars, a decrease of 11.2 billion U.S. dollars compared to 2020, a decline of 5.5%. The top 50 entry threshold is US$278 million, an increase of US$31 million compared to 2020. From the perspective of sales scale, 4 of the world's top 50 construction machinery companies have sales of more than 10 billion U.S. dollars, 29 companies have sales of 1-10 billion U.S. dollars, and 10 companies have sales of 5-10 billion. Between US$100 million and the remaining seven companies have sales of less than US$500 million. In terms of sales share, China’s 10 companies on the list account for 25% of the total, while Japan’s 11 companies account for 22%, the United States accounted for 21.9%, Sweden accounted for 9.7%, and Germany accounted for 5.6%. South Korea accounted for 4.9%, Finland accounted for 3.0%, the United Kingdom accounted for 2.1%, France accounted for 2.0%, Italy accounted for 1.3%, and Austria accounted for 0.9%.

This month, the local community organized the "Hua Mao Cup" basketball invitational tournament. A total of 8 strong teams were invited. The MANBA team was among them. The MANBA team won the group first with an excellent record. In the semi-finals A key three-pointer made by MANBA made the MANBA team qualified for the final. On the night of the final, MANBA and Longji launched a fierce confrontation, biting the score to the end, and finally lost to Longji and won the runner-up.

Earth-moving equipment: commonly used machinery types and their applications in construction In recent years, the demand for modern infrastructure has grown exponentially. The government has launched a number of plans, such as achieving universal housing by 2022, PMAY and smart city missions, which require either the construction of new infrastructure or the upgrading of existing infrastructure. These plans can only have a positive impact on the construction industry and the construction equipment industry. According to a report released by Business Wire, India's real estate market is expected to grow at a compound annual growth rate of 11.54% by 2020, and its valuation will reach Rs 121,000 crore by 2020, while India’s construction equipment industry is expected to grow at a compound annual growth rate. The annual growth rate is 6.8% between FY18 and FY24. Due to its size and importance, the most easily identifiable machinery on any construction site is earth-moving equipment, which is ubiquitous in various applications in the construction industry. They are used in various earthwork projects, including laying foundations, leveling soil, removing dust and rocks, digging trenches, demolition projects, etc. These complex machines are operated by professionals. Different types of earth-moving machinery can complete different types of tasks, and due to technological advances in the industry, there are various types of earth-moving machinery on the market today that can meet almost any type of construction activity. Excavators Backhoe Loaders Bulldozers Skid-Steer Loaders Trenchers 1. Excavators These heavy machines consist of a hopper and a long arm, with a bucket attachment at the end of the long arm. They use hydraulic systems to function. The operator controls the excavator from a basic cab that can rotate 3600. The basic cab is placed on a supporting structure with wheels or tracks. Excavators are widely used in small and large construction sites. Their applications include excavation, demolition, heavy lifting, leveling, beautification, mining, dredging, etc. 2. Backhoe Loaders A backhoe loader or backhoe is a machine mounted on a tire, with a shovel at the front and a bucket connected to the back end of the bucket. They look very similar to agricultural tractors, and their mobility makes them very suitable for use in urban areas. The backhoe loader is a medium-sized machine that can be used for applications such as excavation engineering, trenching, placing pipes, filling trenches, and lifting materials. Some backhoe loaders have retractable buckets that can be replaced with other equipment for construction activities or buckets of various sizes, which can be used for applications such as digging trenches with different widths. 3. Bulldozers Bulldozers are considered to be one of the heaviest machines that can be found on construction sites, and one of its most common applications is to move large amounts of dirt or soil in large and empty con...

On October 22, 2020, Tokyo Hitachi Construction Machinery Co., Ltd. announced that it would launch Hitachi EX2000-7 super large hydraulic excavator in October 2021. EX2000-7 is modified from EX1900-6, which can save up to 19% of fuel while maintaining the same productivity. EX2000-7 has high durability structural components adopted on current EX-7 series machines, and can combine ICT and IOT based maintenance services and inspection support services. In addition, due to the use of a new hydraulic circuit, increased mode selection function, it also achieves higher fuel efficiency. Due to the significant reduction of fuel consumption, it helps to reduce environmental impact and life cycle cost. Since the launch of the first large-scale hydraulic excavator UH50 (operating weight: 159 tons) in 1979, Hitachi construction machinery's ultra large hydraulic excavator has been working in mines around the world, and has won a reputation for its high productivity, reliability and durability. At Hitachi, solutions are provided, such as mining equipment and operational control systems using ICT and IOT to address customer challenges, such as improved safety and productivity, and reduced life cycle costs. EX2000-7, with an operating weight of 193 tons, is one of Hitachi's EX-7 super large and medium tonnage excavators. It is expected that the demand for small and medium-sized mining and quarries is very high, and fuel efficiency is critical. EX2000-7 achieves 19% fuel savings through a series of newly designed energy-saving features, making the engine layout more compact and maintaining excellent productivity. Compared with EX1900-6, EX2000-7 can save up to 460 tons of CO2 emissions per machine per year. China top brand Hitachi excavator spare parts supplier, we supply OEM Hitachi track chain,bucket pin & bushings,rollers and other Hitachi aftermarket parts. Get detail price about genuine Hitachi and replacement production quickly! Our website: www.manbaparts.com.

Finning UK & Ireland explains how to eliminate the risk of investing in second-hand equipment Buying machinery and equipment at any time is a huge investment. As the company emerged from the lockdown and tried to restore pre-pandemic working levels, Fining UK & Ireland, the exclusive distributor of Caterpillar® equipment, reported a surge in demand for used Cat® machines. Here, Finning's second-hand equipment machine inspector Scott David (Scott David) provided some instructions to help the company understand what to look for to reduce the risk of buying second-hand machines. Find visible component wear One of the first and most important things to check is the condition of all easily visible worn components, such as the undercarriage, tires and ground bonding tools (GET). These can be a good indicator of the overall condition of the machine. This is particularly important for tracked machines, because the landing gear can account for a large part of the value of a second-hand machine, and if worn parts are omitted, the cost is high. Just because the chassis system does not look perfect from a distance, so be sure to check the condition of each component. Pay attention to whether the hydraulic components leak The weeping hydraulic cylinder collects dust. Check the machine for leaks in hydraulic hoses and whether there are wet areas around valve blocks, pumps and motors. These can lead to expensive maintenance and repair costs, not to mention machine downtime and loss of on-site work. When will the machine be overhauled next time? Every Cat® machine has a life expectancy. Check the machine time to figure out how much time it will take before the machine is ready to rebuild. Through this operation, you can calculate how long the machine will provide you with production and future maintenance costs based on the estimated usage. It is worth mentioning that the machine has been reassembled with all components. Check the color of the fluid in the machine If the oil is black or black, it may be caused by maintenance and oil changes. However, this may also indicate a more serious problem, such as an engine failure. If the oil smells of tar, it may indicate overheating or fuel dilution. Oil discoloration is a good indicator of overheating, contamination or wear in the hydraulic system and gearbox. Does the oil smell again, and it smells burnt? Operate all hydraulic systems through a complete cycle Check if any critical services of the machine are running slowly or tired, as this may indicate a malfunction, clogged filter or other hydraulic problems. When running the service, check the wear of the bearing and connecting rod; when the bucket, blade, etc. touch the ground and heavy objects fall off the pin, is there excessive movement of the connecting rod mechanism? This may mean that the bearing is worn or collapsed, and the connecting rod hole is also worn. Review the maintenance record Just like you are checking the service record (if...

More than 175,000 Caterpillar medium-duty high-drive bulldozers have been produced. In 1985, with the introduction of the H series engine, Caterpillar extended its revolutionary overhead sprocket chassis concept to the Medium Track Tractor (MTTT) series. For bulldozers of 130 to 350 hp (100 to 250 kW), it is still unique today. The high drive design is more suitable for the ground, and the ratio of the low drive and oval track design improves durability, maintainability and performance. Cat®D4H, D5H, D6H and D7H bulldozer models are the first models to adopt a high-drive design. In 1987, D8L introduced this series. In addition to bringing many of the same advantages of large bulldozers to the medium-sized production line, the elevated drive sprocket also allows the movement of the front and rear crawler inertia wheels. In contrast to an elliptical crawler, this helps to more easily fine-tune mechanical balance and ground pressure for specific applications. For the first time, the D4H and D5H models provide variable pitch angle tilt (VPAT) blades for high-drive bulldozers to change the job by stepping at higher speeds. Thirty-five years later, Caterpillar celebrated the production of 3 commemorative 175,000 units in May 2020, thus achieving the unparalleled success of sprocket design on medium-sized bulldozers. Wes Holm, Chief Product Engineer of Caterpillar Medium Tractors, said: "Because these devices set new standards for efficiency, productivity and ease of operation. "With our next-generation medium-duty bulldozer production line, including With the new D5, D6 and D7 models, we will continue to promote the development of these areas through technological transformation to raise productivity and efficiency to another level. " Three commemorative Cat® tractors built Due to travel and assembly restrictions due to the ongoing coronavirus pandemic, Caterpillar cancelled in-person celebrations to commemorate the historic 175,000 milestone of its medium-sized bulldozer. However, three customers own these memorial units. The fenders on these memorial units have special decals, which represent a milestone of 175,000 units. This 175,000 image also appeared inside the cab, embroidered on the headrest, and printed on a plaque marking the status of each limited edition. The first two memorial devices built in East Peoria, Illinois are Cat D6 XE electric bulldozers with a smooth dark gray and black paint scheme. The third is the D6 bulldozer, with a 4-speed, fully automatic transmission, made of traditional Cat yellow finishing, with special black tracks and blades. Cat D6 XE is a symbol of long-term innovation in the medium-sized bulldozer product line, and is the world's first electric bulldozer to provide an elevated sprocket design. It has a sturdy and lightweight structure that can provide the best machine balance for leveling without the need for rear tools or counterweights. Integrated Cat GRADE technologies, such as the standard Slope Assis...

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