Editorial Technical Reference

Rear Frame

This page explains how Rear Frame is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The structural rear section of an articulated chassis that supports rear-mounted components and provides connection points.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Rear Frame

Definition
The rear frame is a critical structural component of an articulated chassis system, forming the rigid rear section that supports various rear-mounted equipment such as engines, transmissions, cargo beds, or specialized attachments. It provides mounting points for suspension systems, axles, and other chassis components while maintaining structural integrity under load and during articulation movements. Constructed from high-strength steel or alloy steel, the rear frame is designed to distribute weight and forces from rear-mounted components through the chassis, ensuring stability and durability. Its dimensions, including overall length (1800–2200 mm), width (800–1000 mm), and height (400–600 mm), are tailored to fit standard chassis lengths and match vehicle track width, affecting ground clearance and mounting. The frame's weight capacity ranges from 5000 to 10000 kg, with a typical weight of 150–250 kg, influencing vehicle dynamics. Material grade Q345B, conforming to GB/T 1591, provides a minimum yield strength of 345 MPa and tensile strength of 470–630 MPa. Surface treatment consists of epoxy primer and polyurethane topcoat, with a dry film thickness of 60–120 μm per ISO 2808, ensuring corrosion protection. Mounting holes are sized for M12–M16 bolts, with a diameter of 12–16 mm and tolerance of ±0.1 mm per ISO 2768-m, ensuring alignment. The rear frame operates within a temperature range of -40 to 85°C, suitable for extreme environments. As a component, it is essential for articulated vehicles, providing the structural backbone for rear-mounted systems. For specific applications, verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
The rear frame functions as a load-bearing structure that distributes weight and forces from rear-mounted components through the chassis. It maintains rigidity while allowing for controlled flex during articulation, typically connecting to the front frame section through pivot points or articulation joints. The frame transfers loads to the suspension system and provides stable mounting surfaces for various vehicle systems. Its design ensures that stresses are evenly distributed, preventing localized failure and maintaining structural integrity under dynamic conditions. The frame's geometry and material properties, such as yield strength and tensile strength, are critical for withstanding operational loads. Proper installation and maintenance of mounting points are essential to preserve alignment and load transfer efficiency.
Common Materials
High-strength steel, Alloy steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Overall Length1800–2200 mmFits standard chassis lengths
Overall Width800–1000 mmMust match vehicle track width
Overall Height400–600 mmAffects ground clearance and mounting
Weight Capacity5000–10000 kgStatic load rating
Material GradeQ345BHigh-strength low-alloy steelGB/T 1591
Yield Strength≥345 MPaMinimum for Q345BGB/T 1591
Tensile Strength470–630 MPaRange for Q345BGB/T 1591
Surface TreatmentEpoxy primer + polyurethane topcoatCorrosion protection
Coating Thickness60–120 μmDry film thicknessISO 2808
Mounting Hole Diameter12–16 mmFor M12–M16 bolts
Mounting Hole Tolerance±0.1 mmEnsures alignmentISO 2768-m
Operating Temperature-40–85 °CExtreme environments
Weight150–250 kgAffects vehicle dynamics

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
  • Main Rails Part
    Primary longitudinal structural members that carry most of the load
    Material: High-strength steel
  • Cross Members Part
    Transverse structural elements that connect main rails and provide lateral stability
    Material: Steel
  • Mounting Brackets Part
    Attachment points for suspension components, axles, and other systems
    Material: Steel
  • Articulation Joint
    Connection point allowing movement between front and rear frame sections
    Material: Alloy steel
  • Reinforcement Plates Part
    Additional structural supports at high-stress areas
    Material: Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rear Frame.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 5 bar
temperature: -40°C to 150°C
load capacity: Up to 5000 kg
vibration tolerance: ISO 10816-3 Class B
Media Compatibility
✓ Heavy-duty construction equipment ✓ Mining vehicle chassis ✓ Agricultural machinery frames
Unsuitable: Marine/saltwater environments without corrosion protection
Sizing Data Required
  • Maximum rear axle load (kg)
  • Required connection point specifications (quantity/type)
  • Overall vehicle dimensions and weight distribution

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic loading from operational vibrations and stress concentrations at weld joints or sharp corners.
Corrosion-induced weakening
Cause: Exposure to moisture, chemicals, or environmental contaminants leading to material degradation and loss of structural integrity.
Maintenance Indicators
  • Visible cracks or deformation in the frame structure
  • Unusual vibrations or audible creaking during operation
Engineering Tips
  • Implement regular non-destructive testing (e.g., ultrasonic or magnetic particle inspection) to detect early-stage cracks.
  • Apply protective coatings and ensure proper drainage to prevent moisture accumulation and corrosion.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASTM A36/A36M - Standard Specification for Carbon Structural Steel CE Marking - EU Machinery Directive 2006/42/EC

Quoted from the published standard.

Manufacturing Precision
  • Flatness: +/- 0.5 mm per meter
  • Hole Alignment: +/- 0.2 mm positional tolerance
Quality Inspection
  • Dimensional Verification with CMM (Coordinate Measuring Machine)
  • Visual and Dye Penetrant Inspection for Surface Defects

Manufacturers of Rear Frame

Manufacturer profiles associated with Rear Frame.

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Frequently Asked Questions

What materials are used for the rear frame?

The rear frame is typically made from high-strength steel or alloy steel, with material grade Q345B as specified in the directory. This grade conforms to GB/T 1591 and provides a minimum yield strength of 345 MPa and tensile strength of 470–630 MPa.

What are the key dimensions of the rear frame?

The overall length ranges from 1800 to 2200 mm, width from 800 to 1000 mm, and height from 400 to 600 mm. These dimensions are designed to fit standard chassis lengths and match vehicle track width, affecting ground clearance and mounting.

How is the rear frame protected against corrosion?

The rear frame is treated with an epoxy primer and polyurethane topcoat, with a dry film thickness of 60–120 μm as per ISO 2808. This surface treatment provides corrosion protection for various environments.

What is the weight capacity of the rear frame?

The static load rating is between 5000 and 10000 kg. The frame itself weighs approximately 150–250 kg, which affects vehicle dynamics. Always verify the specific capacity for your application with the manufacturer.

Data Basis

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

Preliminary Technical Classification
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