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Excavator Bucket Linkage: The Heart Of Precision Control

Excavator Bucket Linkage: The Heart Of Precision Control

Bucket linkage is the key transmission structure connecting the boom, bucket and bucket of the excavator. It realizes the lifting, retraction and rotation of the bucket through the coordinated action of multiple sets of hinges, which directly affects the operation accuracy and response speed. The products cover three series of standard type, heavy-duty type and lightweight type, and are suitable for 20 + mainstream models such as Carter 320D, Komatsu PC200, Sany SY215 and Volvo EC210, ranging from 1.5 tons of mini-excavators to 50 tons of large mining machines. The standard model is forged with 40CrMo alloy, which is suitable for medium and light load scenarios such as power plant dredging and municipal greening. The tolerance of connecting rod pin hole is controlled at ± 0.02 mm to ensure that the bucket action is not jammed;HG785 high-strength steel with a thickness of 20mm is selected for the heavy-duty type, t
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Advantages Of Bucket Linkage

Integrally Forged Connecting Rod Arm, Heavy Load Deformation ≤ 0.2mm

The stick connecting rod for Carter 349D is integrally forged with 40CrNiMoA, quenched and tempered at 860 ℃, and has a tensile strength of 900 MPa. In the hard rock loading operation of the mine, the deformation of the connecting rod is only 0.2 mm when it bears the impact force of 120 kN, which reduces the deformation risk by 70% compared with the splicing welding structure. An iron mine has been used for 18 months, the connecting rod has no crack, and the bucket action accuracy remains the same as before.

Self-Lubricating Bearing Pin, Maintenance Interval Extended To 2000 Hours

The pin shaft hole of Komatsu PC200 connecting rod is equipped with oil-impregnated bearing and filled with polyurea-based grease, so the sealing performance in dust environment reaches IP66 level. According to the feedback from the municipal engineering team, the traditional connecting rod needs to be oiled every 500 hours, but it still rotates flexibly after 2000 hours, reducing three times of shutdown maintenance, and saving 8000 yuan of man-hour cost per unit per year.

Topology Optimization Lightweight, 8% Fuel Consumption Reduction

For the connecting rod designed for the Kubota U15 mini excavator, the weight is reduced by 1.2kg (15%) by removing redundant material through finite element analysis, while the strength of key parts is increased by 10%.The orchard operation test shows that the energy consumption of the equipment compound action is reduced, the fuel consumption per hour is reduced from 3.2L to 2.95L, and the annual fuel saving is more than 5000 yuan.

Precise Control Of Hole Position For All Models, No Secondary Processing Required For Installation

The trunnion hole of SANY SY215 connecting rod is processed by double-shaft linkage, with coaxiality error ≤ 0.03 mm, which is perfectly matched with the connecting pin of the bucket arm and bucket. When an engineering team was replaced, two people completed the installation in 1.5 hours without grinding and reaming. After the test, the angle error of the bucket was ≤ 1 °, and the operation accuracy was consistent with that of the new machine.

Our Product

Bucket linkage is a key transmission component connecting boom, bucket and bucket, which transmits hydraulic power through multiple sets of hinge structures and directly determines the action accuracy and load capacity of bucket.Our products cover 1-50 tons of excavators, precisely adapted to Carter 336D, Komatsu PC200-8, Sany SY215C, Volvo EC360 and other 50 + mainstream models, covering from municipal fine operations to mine heavy-duty construction.

Three series are designed for different scenarios: the mine heavy-duty model is integrally forged with 40CrNiMo, and the diameter of the trunnion is increased to 80mm, which is suitable for Carter 336D to withstand 150kN impact force in hard rock mining, and the deformation is controlled within 0.3mm;HG785 high-strength steel is selected for municipal engineering. After shot blasting treatment, it is suitable for Komatsu PC200-8 to maintain stable action when concrete is broken. The tolerance of connecting rod pin hole is ≤ 0.02 mm to ensure that the bucket rotates without jamming;The special model for micro-digging reduces weight by 20% through topology optimization, improves fuel efficiency when digging ditches in orchards with Kubota U15, and reduces fuel consumption by 0.3 L per hour.

In terms of installation accuracy, all connecting rods are processed according to the original coordinate system. The coaxiality error of the connecting hole of SANY SY215C is ≤ 0.04 mm. The replacement can be completed in 1.5 hours by a team of two people without additional debugging.According to the feedback from a municipal engineering team, the angle error of bucket retraction and release was reduced from 3 ° to 0. 5 ° after replacement, and the flatness of trench bottom was increased by 40% when laying pipelines; after the use of heavy-duty funds in Shanxi mines, the fracture rate of connecting rods was reduced from once a month to zero in half a year, and the attendance rate of equipment was increased by 25%.

FAQ

Is the stick linkage of the Carter 336D exactly the same size as the original part?

Exactly. The trunnion diameter and hole pitch error shall be ≤ 0.02 mm, and the fit clearance between the connecting rod of Carter 336 D and the connecting pin of boom and bucket rod shall be controlled at 0.1-0.15 mm. After the replacement in a mine, the movement range of the bucket is the same as that of the new one, and there is no jamming when loading hard rock.
Galvanized + electrophoresis double coating type is recommended, suitable for Komatsu PC200 wet type. The coating thickness is up to 80 μm, and there is no rust after 480 hours of salt spray test. In the Jiangsu Wetland Project, the equipment has been continuously immersed for three months, the rotating part of the connecting rod has no rust, the resistance is the same as that of the new machine, and the service life is twice longer than that of the ordinary spray paint.
No debugging required. The accuracy of the connecting rod hole position suitable for SANY SY215C reaches IT7 level, and it is completely concentric with the connecting shaft of the bucket arm and bucket. An engineering team worked directly after the replacement, the angle error of bucket retraction and release was less than 0.5 °, and the excavation trajectory was consistent with that before the replacement, which saved 2 hours of debugging time.
The lightweight model can withstand a rated load of 8kN and is forged from 6061-T6 aluminum alloy, which is 30% lighter than the steel model, but has a yield strength of 270MPa.The orchard test showed that when Kubota U15 used it to dig a 1-meter-deep ditch, the connecting rod did not deform after 8 hours of continuous operation, which met the light load demand of agriculture.

Poor Accuracy Of Municipal Construction? Has The Stick Linkage Of Komatsu Pc200 Been Changed?

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What Our Clients Are Saying?

Captain Li
Captain Li
Shanxi Iron Mine Construction Team
"Carter 336d Replaced The Heavy-Duty Connecting Rod, And The Hard Rock Operation In The Mine Did Not Deform For Half A Y

The previous connecting rod was bent after being used in the iron ore mine for 3 months. After replacing this integrally forged heavy-duty model, the Carter 336 D loaded 200 cars of hard rock every day. After 6 months, the connecting rod did not deform, and the bucket was retracted and released as smoothly as the new machine. The most unexpected thing is that the wear of the pin has slowed down, and now it is only replaced once every two months, which saves a lot of effort.

Manager Zhang
Manager Zhang
Shandong Municipal Engineering Company
"After The Connecting Rod Of Komatsu Pc200 Is Replaced, The Municipal Trenching Accuracy Is Increased From ± 5 Cm To ± 2

Municipal pipeline laying requires high precision, the original connecting rod pin hole is worn out, and the depth difference of trench digging is 5cm.After changing this model with precise pin holes, the bottom of the ditch dug by Komatsu PC200 was very smooth, the error was controlled within 2cm, the supervisor passed it once, and the construction period was 10 days ahead of schedule.

Boss Wang
Boss Wang
Shaanxi orchard grower
"The Lightweight Connecting Rod Of Kubota U15 Reduces The Fuel Consumption Of Orchard Operation By 0.4l/Hour"

There are many transitions in the orchard. The original connecting rod is too heavy. The fuel consumption of Kubota U15 is 3.8 L per hour. Changed this lightweight, looks thin but enough strength, digging fruit tree pits is no problem, now fuel consumption is reduced to 3.4L, 8 hours a day can save more than 3 liters of oil, a year down can save more than 2000 oil money.

Master Zhao
Master Zhao
Henan Demolition Engineering Team
"If The Sany Sy215 Connecting Rod Is Broken Within The Warranty Period, The Manufacturer Will Directly Replace It With A

The connecting rod was accidentally broken when the house was demolished last month. After contacting the manufacturer, it was said that a new one was sent in 3 days during the warranty period. Now the Sany SY215 special connecting rod has been used for a month without any problems. It is very stable when lifting big stones. It is much more reliable than the miscellaneous brands bought before.

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Integrally Forged Heavy Duty Structure Improves Impact Resistance In Mining Operations By 80%

Integrally Forged Heavy Duty Structure Improves Impact Resistance In Mining Operations By 80%

The bucket rod connecting rod suitable for Carter 336 D is integrally forged with 40CrNiMo, the trunnion diameter is up to 80mm, the tensile strength is 900 MPa, and the deformation is ≤ 0.3mm under 150kN impact force. The actual measurement of Shanxi Iron Mine shows that its anti-cracking performance is three times that of the welded connecting rod, the service life of a single connecting rod reaches 2000 hours, and the replacement frequency is reduced by 60%.
Micron Hole Position Accuracy, Municipal Operation Accuracy Up To ± 1 °

Micron Hole Position Accuracy, Municipal Operation Accuracy Up To ± 1 °

The connecting rod pin hole of Komatsu PC200 municipal model is processed by double-axis boring machine, the tolerance is controlled at ± 0.02 mm, and the fit clearance with the pin shaft is stable at 0.1-0.15 mm. In Shandong municipal engineering, the angle error of bucket retraction and release after assembly is less than 1 °, the trench flatness is improved from ± 5 cm to ± 2 cm, and the rework rate is reduced by 70%.
Topology Optimization Lightweight, 12% Fuel Consumption Reduction For Micro Excavation

Topology Optimization Lightweight, 12% Fuel Consumption Reduction For Micro Excavation

The Kubota U15 special connecting rod is reduced in weight by 20% (only 2.8kg) by removing redundant materials through finite element analysis, but the yield strength is maintained at 270MPa.In the test of Shaanxi orchard, the fuel consumption of the equipment was reduced from 3.8 L to 3.3 L per hour, and 5L diesel oil could be saved in 10 hours per day, and the annual fuel cost was reduced by 4000 yuan.
Double Coating Anti-Corrosion Technology, Extending The Anti-Rust Period Of Wetland Operation By 1 Time

Double Coating Anti-Corrosion Technology, Extending The Anti-Rust Period Of Wetland Operation By 1 Time

Volvo EC210 Wetland model connecting rod is galvanized + electrophoretic double coating, with a thickness of 80 μm and a salt spray test of 500 hours. In Jiangsu Wetland Project, the equipment has been continuously immersed for 6 months, and there is no rust on the rotating part of the connecting rod, which is twice as long as the anti-rust period of the ordinary spray paint, and the maintenance period is extended from 3 months to 6 months.
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