Insulated Telescopic Arm With Self-Adjusting Roller Pressure Balancing

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Solution Overview

Problem

Existing insulated telescopic arms in bucket arm vehicles suffer from uneven pressure distribution among parallel rollers, leading to increased wear and reduced insulation performance due to friction and hydraulic system issues.

Innovation Solution

A self-adjusting roller apparatus with a pressure cylinder, piston rods, and multiple roller assemblies that adjust automatically to ensure even pressure distribution, using hydraulic or pneumatic systems to support the inner arm, minimizing wear and enhancing insulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If two rollers are mounted in parallel to form an integral roller assembly, then the pressure from the insulated inner arm is shared between the rollers, but the pressure distribution becomes uneven leading to increased wear

Engineering Contradiction:

Improvepressure sharingVSAvoidpressure distribution uniformity

Core Design Contradiction:

ForceVSReliability

Solution Approach 1:

The roller assembly is segmented into multiple independent roller units (first roller, second roller, third roller, fourth roller) that can move independently within guide grooves. This segmentation allows each roller to independently adjust its position to achieve uniform pressure distribution across all rollers, resolving the uneven pressure problem while maintaining force sharing capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The roller assembly transitions from a static integral structure to a dynamic configuration where individual rollers can move independently within guide grooves. This dynamic capability enables the rollers to self-adjust their positions in response to varying loads and arm bending conditions, ensuring uniform pressure distribution and reducing wear on the insulated inner arm.

Inventive Principle:

Principle #15Dynamics

2Loss of energy

If a rolling roller device replaces the slider, then rolling friction reduces hydraulic system pressure and wear, but the contact area decreases leading to excessively high specific pressure

Engineering Contradiction:

Improvehydraulic system pressureVSAvoidspecific pressure

Core Design Contradiction:

Loss of energyVSStress or pressure

Solution Approach 1:

The invention merges the advantages of both slider and roller mechanisms by combining multiple rollers into an integrated roller assembly that spans a wider contact area. This merging approach maintains the rolling friction benefits (reduced hydraulic pressure and wear) while distributing the load across multiple rollers to achieve uniform pressure distribution and prevent excessively high specific pressure at any single contact point.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If the insulated inner arm contacts the nylon slider directly, then sliding movement is produced for extension and retraction, but the nylon ages and is not wear-resistant leading to increased friction and scratches on insulating coating

Engineering Contradiction:

Improvesliding movementVSAvoidwear resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The invention replaces the sliding mechanical system (nylon slider) with a rolling mechanical system (multiple rollers). This substitution eliminates the wear and aging problems associated with nylon sliders while maintaining the necessary movement functionality. The rolling contact provides smoother operation, reduced friction, and significantly improved wear resistance compared to the original sliding mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution ensures even pressure distribution across multiple roller assemblies, reducing wear and improving the service life and insulation performance of the telescopic arm.

Implementation Method 1

Methodology Applied

Scientific EffectHydraulic or pneumatic pressure: Hydraulic Press

Data Source

PatentUS20260103370A1Insulated telescopic arm and insulated bucket arm vehicle

Publication Date: 2026.04.16 ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO LTD

AI summary

An insulated telescopic arm and an insulated bucket arm vehicle. The insulated telescopic arm comprises an outer arm (1), an insulated inner arm (2) and a self-adjusting roller apparatus (3). The insulated inner arm (2) is limited in the outer arm (1) and can extend out of the outer arm (1) from a free end of the outer arm (1) along an axial direction. The self-adjusting roller apparatus (3) comprises a pressure cylinder (31) disposed on the outer arm (1), piston rods (32)capable of moving up and down in the pressure cylinder (31), and roller assemblies (33) used to carry the insulated inner arm (2), there being at least two roller assemblies (33), and the roller assemblies (33) each comprising a roller shaft (331) and a roller body (332) used to carry the insulated inner arm (2) and rotatably sleeved on an outer side of the roller shaft (331). Two ends of the roller shaft (331) extending out of the roller body (332) are each correspondingly connected to a piston rod (32). Since a fluid medium in the pressure cylinder (31) provides an equal force to each piston rod (32), it can be ensured that the at least two roller components (33) are uniformly stressed, thereby greatly reducing the wear rate, and improving the service life and insulation performance of the insulated inner arm.