Interior Connection Components for Buses and Subways

Core Product Introduction

1. Tube Connector Series — Tees / Crosses / Elbows

Used to connect handrail tubes, enabling multi-directional extension and directional changes; these components serve as the "joints" of the handrail system.

Tee Connectors

Function: Facilitate T-shaped connections between handrail tubes, establishing a multi-directional handrail network within the vehicle interior. The interior of the Tee features precision-machined positioning steps, ensuring consistent insertion depth for the tubes and a secure connection.

Technical Specifications:
- Material: 304 Stainless Steel
- Wall Thickness: 2.5–4.0 mm (depending on specifications)
- Tensile Strength: ≥ 520 MPa
- Installation Method: Set screw fastening / Through-tube welding

Cross Connectors

Function: Facilitate cross-shaped connections between handrail tubes, suitable for locations in the central section of the vehicle interior that require multi-directional extension. The center of the Cross connector features a reinforced rib design to ensure structural integrity.

Technical Specifications:
- Material: 304 Stainless Steel
- Wall Thickness: 3.0–5.0 mm (depending on specifications)
- Tensile Strength: ≥ 520 MPa
- Installation Method: Set screw fastening / Through-tube welding

2. Mounting Base Series — Top Mounts / Bottom Mounts / Side Mounts

Used to connect handrails to the vehicle's ceiling, floor, or side walls; these components serve as the "foundation" of the handrail system.

Top Mounts

Function: Secures the handrail to the vehicle's ceiling; serves as the primary load-bearing component for vertical stanchions and hanging rails. The base features reinforcing ribs on the underside to distribute stress and prevent concentration.

Technical Specifications:
- Material: 304 Stainless Steel
- Base Plate Thickness: 4.0–6.0 mm
- Mounting Holes: 2–4 holes (φ10–12 mm)
- Load-bearing Capacity: ≥ 500 kg
- Mounting Method: Bolt fixation

Bottom Mounts

Function: Secures vertical stanchions to the vehicle's floor; bears the entire vertical load of the handrail system.

Technical Specifications:
- Material: 304 Stainless Steel
- Base Plate Thickness: 5.0–8.0 mm
- Mounting Holes: 4 x φ12–14 mm holes
- Load-bearing Capacity: ≥ 800 kg
- Mounting Method: Bolt / Embedded Anchor Fixing

Side Mounts

Function: Secures horizontal handrails to the side walls of the vehicle interior, providing a horizontal grab bar for standing passengers. The side mount features an eccentric design, allowing for fine-tuning of the installation position.

Technical Specifications:
- Material: 304 Stainless Steel
- Base Plate Thickness: 4.0–6.0 mm
- Mounting Holes: 2–3 x φ10–12 mm holes
- Load-bearing Capacity: ≥ 300 kg
- Mounting Method: Bolt Fixing

3. Glass/Panel Fixing Series — Glass/Panel Clamps

Used for securing transparent or flat components within vehicle interiors, such as glass partitions, advertising displays, and information panels.

Glass Clamps

Function: Secures tempered glass or acrylic partitions to handrails or the vehicle's structural framework; typically used for driver cabin partitions, passenger zone dividers, advertising display mounting, etc.

Technical Specifications:
- Material: 304 Stainless Steel
- Clamping Width: 30–50 mm
- Rubber Pad: EPDM / Silicone (Anti-aging)
- Clamping Force: ≥ 500 N
- Installation Method: Bolt Clamping

Panel Clamps

Function: Secures flat components such as information panels, advertising boards, and decorative panels; adaptable to various thickness and installation angle requirements.

Technical Specifications:
- Material: 304 Stainless Steel
- Clamping Width: 30–60 mm
- Rubber Pad: EPDM (Anti-slip, Shock-absorbing)
- Clamping Force: ≥ 400 N
- Installation Method: Bolt Clamping / Screw Fixing

4. Specialized Connector Series

Non-standard connectors developed to address specific installation requirements.

Technical Support and Services

Customization Services

Standard Component Supply
We maintain an inventory of standard components in common specifications, enabling us to respond rapidly to customer requirements.

Customization via Drawings
Customers may provide drawings or physical samples; we offer the following services:
- DFM Analysis: Manufacturability assessment and design optimization
- Mold Development: Creation of specialized molds tailored to the complexity of the design
- Sample Verification: Small-batch prototyping for approval prior to mass production

Specialized Surface Finishes
- Customized brushed grain direction
- Customized mirror polishing grades

Requesting a Quote and Samples

Information Required for Quotation:
1. Product Type (e.g., 3-way connectors, 4-way connectors, top mounts, base mounts, glass clamps, etc.)
2. Applicable Handrail Diameter
3. Estimated Quantity
4. Special Requirements (if any)

Sample Services
- Standard Components: Samples provided within 3–5 business days
- Custom Components: Samples provided 7–10 days after mold completion

Why choose us

Professional Expertise
- 15 Years of Focus: Deeply specialized in interior components for public transportation since 2008.
- Comprehensive Range: A one-stop solution covering everything from connectors to fasteners.
- Nationwide Project Validation: Products successfully deployed across metro lines in major cities throughout the country.

Quality Assurance
- 304 Stainless Steel: High-grade raw materials, fully traceable back to the steel mill.
- Precision Machining: CNC machining centers ensure dimensional accuracy.
- Surface Treatment: Professional brushed and polished finishes ensure a uniform texture.
- Rigorous Testing: Every production batch undergoes sampling for salt spray and mechanical testing.

Service Advantages
- Rapid Response: Technical inquiries answered within 24 hours.
- Sample Support: Samples available for practical testing and evaluation.
- Customization Capabilities: Development of specialized components based on client-provided drawings.
- Production Consistency: High uniformity in mass production, with a CPK value of ≥1.33.

Strict Quality Certifications
- EN45545 Certification: Compliant with EU fire safety standards for rail transport.
- ISO 9001 Quality Management System
- Tensile Test Approved: All components have successfully passed rigorous mechanical testing.

Technical Specifications and Certifications

General Technical Parameters

Surface Treatment Process

We employ a precision brushing/mirror polishing process to ensure a uniform surface texture for every product:

1. Coarse Grinding: Removes burrs and machining marks.
2. Fine Grinding: Gradual fine grinding using 240-grit to 400-grit abrasive belts.
3. Brushing: Long-grain brushing to achieve a uniform and consistent texture.
4. Polishing: Cloth wheel polishing to achieve a mirror-finish effect.
5. Cleaning: Ultrasonic cleaning to remove surface residues.
6. Passivation: Enhances corrosion resistance.
7. Inspection: 100% visual inspection.

Applicable Handrail Specifications

Installation Fit: The inner bores of all connecting components undergo precision machining; the clearance fit with the handrail tubing is controlled within a range of 0.2–0.5 mm, facilitating ease of installation while ensuring a secure connection.