release time:2025-10-13 16:38
With the domestic wood grabber market size exceeding 12 billion yuan in 2025, and the equipment stock reaching 125,000 units, the problem of inflexible grab arms has gradually become the main pain point restricting operation efficiency. According to industry after-sales data statistics, such failures account for 38% of the total repair of wood grabbers, causing an average of 15% efficiency loss to users in forestry, municipal and other fields. Industry experts point out that the inflexibility of grab arms is mostly due to the lack of system maintenance and improper operation. Accurate investigation can shorten the maintenance cycle by 60%.
Hydraulic system failure is the main cause, accounting for 45%. Li Gong, after-sales engineer of Shandong Guoneng Industrial, explained that hydraulic oil pollution or abnormal oil temperature will directly lead to sluggish response of the gripper arm. "If the oil granularity exceeds the standard, it will cause the valve group to be stuck, and the opening and closing speed of the gripper arm will drop by more than 50%." A Guangxi forest farm recently had a batch failure. The test found that the moisture content of the hydraulic oil exceeded the standard by 3 times. After replacing the filter element and adding anti-wear hydraulic oil, the equipment returned to normal. In addition, the pressure caused by the attenuation of the hydraulic pump efficiency and the leakage of the pipeline will also reduce the gripping force of the gripper arm. This kind of problem is particularly prominent in the old equipment that has been used for more than 5 years.
The wear and lag of mechanical components followed closely, accounting for 30% of the total number of failures. The core wear and tear parts were concentrated in pins, bushings and slides, and long-term grasping of wet wood or construction waste could easily lead to component corrosion. According to the 2025 fault investigation report of Machinery Wood Industry Network, 70% of the stuck problems originated from the failure of pin lubrication. When the wear and tear exceeded 0.5 mm, the gripper arm would appear bright graphics card. The wood grabber of a municipal engineering team in Xi'an was stuck due to the failure to clean up the sawdust of the slide rail in time. After dismantling, it was found that deep scratches had appeared on the slide rail, and the maintenance cost exceeded 2,000 yuan.
The lack of lubrication maintenance and the failure of the electronic control system constitute two other major reasons. The survey shows that 62% of small users do not perform the monthly lubrication process, resulting in three times the speed of component wear. Mr. Wang, technical director of Changzhou Hongling Machinery, said: "The new wood grabber designed with removable and washable filter elements, combined with lithium-based grease, can extend the maintenance cycle to 30 days." In the intelligent wood grabber, the proportion of electronic control failures is increasing year by year. Problems such as abnormal PLC controller signal and sensor dust accumulation can lead to "misoperation" or delayed response of the grab arm. Such failures are most common in wood processing workshops with high dust concentrations.
Operating habits and environmental factors can not be ignored. Overload operation will increase the deformation probability of the gripper arm by 40%. A forest farm cracked the gripper arm weld due to grabbing logs twice the rated load. The increase in hydraulic oil viscosity in low temperature environment will reduce the response speed of the gripper arm by 30% during winter operation in the north.
Industry experts suggest that users should establish a "three-level investigation" mechanism: daily inspection of hydraulic oil level and lubrication status, weekly cleaning of slide rails and sensors, and monthly monitoring of system pressure. At present, the intelligent wood grabbers launched by Sany, XCMG and other companies have been equipped with fault warning function, which can anticipate the risk of stagnation 72 hours in advance. The market share of such products is growing at an average annual rate of 18%. In the future, with the popularization of maintenance-free bushings, self-cleaning hydraulic systems and other technologies, the flexibility of the gripper arm will be fundamentally improved.
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