Articulated Chassis for Underground Loaders

Product Specifications

Technical details and manufacturing context for Articulated Chassis

Definition

The articulated chassis is a critical structural component of an Underground Loader (LHD) that connects the front and rear frames via a central pivot joint. This design enables the vehicle to articulate, allowing the front section (carrying the bucket) to turn relative to the rear section (housing the engine and operator cabin). This articulation is essential for navigating tight corners and narrow tunnels in underground mining operations, providing superior steering capability compared to rigid-frame vehicles. The chassis consists of two main frame sections connected by a heavy-duty pivot joint, typically using large spherical bearings or kingpin assemblies. Hydraulic cylinders mounted between the front and rear frames provide the force to articulate the vehicle. When the operator activates the steering controls, hydraulic pressure extends or retracts these cylinders, causing the front frame to pivot around the central joint relative to the rear frame, enabling tight turning radii. The chassis is typically fabricated from high-strength alloy steel, with frame material often specified as Q345B (per GB/T 1591). Key parameters include a rated load capacity of 3000–6000 kg (ISO 14397-1), articulation angle of 40–45°, turning radius of 4500–5500 mm (ISO 2867), max travel speed of 20–30 km/h (ISO 3450), operating temperature of -20–50°C, hydraulic system pressure of 16–25 MPa (ISO 4413), weight of 8000–12000 kg, overall dimensions (length 6000–8000 mm, width 2000–2500 mm, height 2000–3000 mm), ground clearance of 300–400 mm, and IP rating of IP54–IP65 (IEC 60529). These values are reference ranges; verify model-specific data with the manufacturer. The chassis is designed for underground mining environments, with features to withstand dust and water jets. Proper maintenance of the pivot joint and hydraulic system is critical for safe operation. Failure to maintain these components can lead to reduced maneuverability, increased wear, and potential safety hazards. Always consult the manufacturer's specifications and relevant standards for your specific application.

Working Principle

The chassis consists of two main frame sections connected by a heavy-duty pivot joint, typically using large spherical bearings or kingpin assemblies. Hydraulic cylinders mounted between the front and rear frames provide the force to articulate the vehicle. When the operator activates the steering controls, hydraulic pressure extends or retracts these cylinders, causing the front frame to pivot around the central joint relative to the rear frame, enabling tight turning radii.

Common Materials

High-strength alloy steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load Capacity	3000–6000 kg	Maximum payload for safe operationISO 14397-1
Articulation Angle	40–45 °	Determines turning radius in confined spaces
Turning Radius	4500–5500 mm	Measured to outermost pointISO 2867
Max Travel Speed	20–30 km/h	Limited by braking performanceISO 3450
Frame Material	Q345B	High-strength low-alloy steelGB/T 1591
Operating Temperature	-20–50 °C	Outside range, hydraulic performance degrades
Hydraulic System Pressure	16–25 MPa	Maximum pressure for hydraulic componentsISO 4413
Weight	8000–12000 kg	Affects transport and ground pressure
Overall Length	6000–8000 mm	Includes bucket and rear frame
Overall Width	2000–2500 mm	Must fit mine drifts
Overall Height	2000–3000 mm	Clearance in underground tunnels
Ground Clearance	300–400 mm	Prevents bottoming on uneven floors
IP Rating	IP54–IP65	Protection against dust and water jetsIEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Front Frame Part
Supports the loader arms, bucket, and hydraulic systems for material handling

Material: High-strength alloy steel
Rear Frame
Houses the engine, transmission, operator cabin, and provides counterweight balance

Material: High-strength alloy steel
Articulation Joint
Provides the pivot point between front and rear frames, allowing rotational movement

Material: Forged steel with hardened bearing surfaces
Articulation Cylinders
Hydraulic cylinders that provide the force to articulate the chassis during steering

Material: Steel with chrome-plated rods

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Articulated Chassis.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Underground Loader (LHD)

View system integration details

Manufacturers of Articulated Chassis

Manufacturer profiles associated with Articulated Chassis.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

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Frequently Asked Questions

What is the primary function of an articulated chassis?

The articulated chassis allows the front and rear sections of an underground loader to pivot relative to each other, improving maneuverability in tight underground spaces by reducing the turning radius compared to rigid-frame vehicles.

What materials are typically used for the frame?

The frame is typically made of high-strength alloy steel, with a common specification being Q345B as per GB/T 1591. Always confirm the exact material grade with the manufacturer for your specific model.

What are the key parameters to consider when selecting an articulated chassis?

Key parameters include rated load capacity (3000–6000 kg), articulation angle (40–45°), turning radius (4500–5500 mm), operating pressure (1.0–1.6 MPa), and hydraulic system pressure (16–25 MPa). These are reference ranges; verify with the manufacturer.

How should the articulated chassis be maintained?

Regularly inspect the pivot joint, hydraulic cylinders, and seals for wear or leaks. Follow the manufacturer's maintenance schedule and use specified lubricants. Monitor hydraulic fluid levels and pressures to ensure proper operation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Max 250 bar hydraulic system pressure
other spec:	Max articulation angle: ±45°, Max continuous torque: 15 kNm, Recommended flow rate: 40-80 L/min hydraulic fluid
temperature:	-20°C to +80°C

Articulated Chassis

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards