Hydraulic Door Hinge

The Pioneering 18.5mm Pull-out No-adjustment Split-type Damping Hinge
- **Innovative Pull-nail & No-adjustment Design**: Features a pull-nail type non-adjustable structure, making installation remarkably convenient and time-saving, eliminating the hassle of complex adjustments during setup.
- **Industry-leading 18.5mm Pipe Diameter**: Breaks through industry limits with a pioneering 18.5mm shaft diameter. The smaller the shaft diameter, the higher the technical content, showcasing superior engineering and manufacturing capabilities.
- **Adjustable Closing Force & Smart Door Control**: After the door is closed, the closing force is adjustable. It also has a functional angle design: the door automatically returns when opened to 160°, with a wind buffer zone from 80° to 20°, a silent locking zone from 20° to 0°, and an arbitrary door-holding zone from 160° to 80°, enabling precise and intelligent door movement control.
- **Enhanced Performance & Durability**: Delivers smooth damping, silent operation, and reliable positioning. Its robust construction ensures long-term durability, making it suitable for various door types and usage scenarios.

1. Pioneering Pull-nail Non-adjustment Architecture
The SQM Series damping hinge pioneers the integration of a pull-nail non-adjustment architectural framework, a paradigm-shifting design that redefines the installation logic of hinge systems. Unlike conventional hinges that necessitate tedious post-installation calibration to rectify misalignments or functional discrepancies, this pull-nail configuration inherently eliminates the need for any adjustment procedures.This not only slashes on-site installation time by over 60% compared to adjustable counterparts but also mitigates the risk of human error-induced performance degradation, ensuring consistent functional efficacy across all installed units.

2. Industry-transcending 18.5mm Ultra-miniature Shaft Diameter
The SQM Series shatters industrial conventions with its 18.5mm ultra-miniature shaft diameter, a technical milestone that transcends the established performance boundaries of hinge systems. In the field of mechanical engineering for hardware components, the reduction of a core load-bearing component's dimensions—such as a hinge shaft—directly correlates with an exponential increase in technical density, as it demands the resolution of multiple conflicting engineering constraints: maintaining structural integrity under static and dynamic loads, ensuring wear resistance during prolonged cyclic motion, and preserving dimensional stability across fluctuating environmental conditions.

3. Flag-type Segmented Structural Kinematics
The SQM Series incorporates an avant-garde flag-type segmented structural kinematics design, a revolutionary approach to hinge motion control that redefines the fluidity and dependability of door operation. Unlike traditional integral hinge structures, which rely on a single pivot point to govern the entire range of door motion—often leading to non-uniform angular velocity, excessive stress concentration at the pivot. Each segment of the hinge's flag-type assembly is equipped with an independent kinematic control module, which adjusts the rotational resistance and angular acceleration in real time based on the door's current position and motion state.

4. Innovative Bead-mediated Transmission Regime
The SQM Series leverages an innovative bead-mediated transmission regime, a cutting-edge technology that redefines the stability and congruence of hinge performance metrics. Traditional hinge transmission systems typically rely on gear meshing or friction-based contact to transfer motion and torque, which are prone to issues such as backlash (gear meshing), uneven wear (friction contact), and performance degradation due to dust or debris accumulation. In contrast, the bead-mediated transmission regime employs a matrix of high-precision, spherical beads (manufactured from zirconia ceramics with a diameter tolerance of ±0.002mm) as the core transmission medium, which are housed within a specially designed raceway that features a variable cross-sectional profile.

5. Modularly Replaceable Dampers
The SQM Series features modularly replaceable dampers, a design innovation that enhances the hinge's durability, maintainability. The damper module is engineered as a fully integrated, self-contained component that is mechanically coupled to the hinge's core assembly via a quick-disconnect interface. This interface employs a bayonet-style locking mechanism with a tactile feedback feature, enabling on-site replacement by maintenance personnel without the need for specialized tools or extensive disassembly of the hinge or door. The damper module itself incorporates a dual-chamber hydraulic damping system with a precision-machined piston (tolerance of ±0.005mm) and a high-viscosity damping fluid (with a viscosity index of ≥400) that ensures consistent damping force across a wide temperature range.

6. Integrated Buffering Damper Assembly
The SQM Series incorporates an integrated buffering damper assembly, a design refinement that ensures seamless damping and buffering during door operations—eliminating the "slamming" effect that is common in conventional hinge systems and enhancing user comfort and door longevity. Unlike external buffering devices that are mounted separately on the door or frame (and thus prone to misalignment, damage, or aesthetic incompatibility), the buffering damper assembly is fully integrated into the hinge's internal structure, occupying minimal additional space while maintaining the hinge's sleek, compact form factor.

7. Exceptional Cryogenic Performance Profile
The SQM Series exhibits an exceptional cryogenic performance profile, a critical technical advantage for applications in cold-climate regions or low-temperature industrial environments where conventional hinges often experience performance degradation (e.g., increased closing speed, reduced damping force, or mechanical seizure). Through rigorous R&D and testing, the hinge is engineered to sustain a uniform closing velocity (with a variation of ≤5% from the nominal value) even in suboptimal low-temperature milieus, operating dependably within an ultra-wide thermal range of -30°C to 60°C.

8. Four Sophisticated Chromatic Variants
The SQM Series is offered in four sophisticated chromatic variants—Golden, Silver, Black, and Grey—each engineered to meet the highest aesthetic and functional standards while effortlessly harmonizing with a plethora of interior and exterior design ontologies. The chromatic finish is applied via a multi-step surface treatment process that combines aesthetic appeal with enhanced durability, corrosion resistance, and scratch resistance. For the Golden variant, a physical vapor deposition (PVD) process is employed to deposit a thin film of titanium nitride (TiN) onto the hinge's surface, resulting in a rich, lustrous golden hue with a thickness of 0.5-1.0μm. Each chromatic variant is subjected to rigorous quality control testing to ensure color consistency (with a Delta E value of ≤1.0 between production batches) and long-term durability, ensuring that the hinge maintains its aesthetic appeal even after years of exposure to sunlight, humidity, and daily use.

9. High Load-bearing Capacity & Protracted Service Lifespan
The SQM Series delivers exceptional high load-bearing capacity and a protracted service lifespan, making it suitable for high-throughput applications where hinges are subjected to frequent use and heavy loads—such as commercial buildings, public facilities, and industrial environments. Each hinge slice (the unit that mounts to the door) is engineered to support a static load of up to 25kg, which is verified through static load testing in accordance with EN 1935 (the European standard for door hinges) where the hinge is subjected to 1.5 times the nominal load for 24 hours with no measurable permanent deformation.

10. Extensive Applicability Spectrum
The SQM Series exhibits an extensive applicability spectrum, with design features that enable compatibility with a wide range of door types—including fire doors, wooden doors, steel entrance doors, and aluminum alloy doors—thus catering to multifarious usage exigencies across residential, commercial, industrial, and institutional sectors. This broad compatibility is achieved through a combination of modular design, compliance with industry standards, and adaptive mounting solutions. This extensive applicability spectrum eliminates the need for end-users to source different hinge models for different door types, simplifying procurement, installation, and maintenance processes.

### Product Highlights of 4-inch Split-type Damping Hinge
- **Innovative Structure**: Pioneering split - structure linkage ensures smooth and reliable operation.
- **Ultra - Small Shaft Diameter**: Boasts an industry - leading 18.5mm shaft diameter, representing high technical content.
- **Temperature Resistance**: Maintains consistent closing speed even in extreme temperatures ranging from - 30°C to 60°C.
- **Advanced Transmission**: Features innovative bead - type transmission for enhanced durability and stability.
- **Replaceable Components**: Springs and dampers are replaceable, allowing for easy maintenance and extended product life.
- **Integrated Buffering**: Built - in damping buffer provides silent locking, automatic door closing, and effective positioning.
- **User - Friendly Installation**: No need for adjustment during installation, and the process can be completed in just 3 simple steps.
- **Versatile Application**: Suitable for various door types including fire doors, wooden doors, entrance doors, and aluminum alloy doors.
- **Long Service Life**: Capable of withstanding up to 150,000 open - and - close cycles, ensuring long - term reliability.
- **Eco - Friendly & Durable Material**: Constructed from space aluminum, it is durable, eco - friendly, and offers a load - bearing capacity of ≥25Kg per slice.

This damping furniture hinge, as an advanced split-type door hinge, features silent operation and automatic positioning functions, making it ideal for use in environments sensitive to noise. Its leak-proof design ensures long-lasting durability and reliability.

a.Innovative 3D Hidden Design**: Features a concealed structure that integrates seamlessly with doors, offering both functional excellence and aesthetic minimalism.
b.Dual Power Spring System**: Utilizes high-load energy-storage springs to deliver stronger door-closing force, ensuring efficient and reliable opening and closing cycles.
c.Dual Buffering System with Exclusive Technology**: Adopts revolutionary integrated European-standard dampers, providing superior shock absorption and smooth operation.
d.Oil-free Power Chamber**: Eliminates the need for hydraulic oil injection, achieving a breakthrough in hydraulic hinges with **zero oil leakage**, ensuring long-term performance stability.
e.Exceptional Low-temperature Resistance**: Engineered with advanced materials and unique processes, it operates smoothly even at -25°C, unfazed by frost, ice, and snow challenges.
f.Adjustable Door-closing Force & Damper**: Door-closing force is customizable to suit different door types, from lightweight entrance doors to heavy fire-resistant doors. The damper offers two modes—silent closing and stable locking—switchable with one click for personalized use.
g.Optimized Functional Angle Design**: Boasts a unique angle structure with a free door-holding zone (180°-110°), a soft-closing zone (110°-20°), and a damping locking zone (20°-0°), ensuring a smooth, comfortable, and controlled door operation experience.

1. **Exclusive Patent**: Owns exclusive patent technology, ensuring uniqueness and advanced performance.
2. **Durable Structure & Long Service Life**: Can withstand up to 300,000 open-close cycles, with a durable structure suitable for a temperature range of -30°C to 60°C.
3. **No Oil Leakage**: Features a design that ensures never oil leakage, maintaining a clean and reliable performance.
4. **Removable & Replaceable Components**: Springs and dampers are replaceable, offering convenient maintenance and long-term usability.
5. **Versatile Application**: Suitable for various door types including fire doors, wooden doors, steel entrance doors, aluminum alloy doors, etc., and applicable to scenarios like automatic door closing, damping and buffering, positioning, windproof, and silent locking.
6. **Four Color Options**: Available in Golden, Silver, Black, and Grey to meet different aesthetic needs.
7. **No Slotting Required & No Left-Right Distinction**: Easy to install without the need for slotting, and there is no distinction between left and right installation directions, enhancing installation convenience.
8. **Space Aluminum Material**: Made of space aluminum, it is lightweight (250g per slice) yet can bear up to 25kg per slice, combining strength and portability.
9. **Low After-sales Cost**: Due to its durable and replaceable components, the after-sales maintenance cost is low.

This furniture hinge is smooth closure hinge with hydraulic damping, which can achieve a smooth and quiet closing effect. It is suitable for both household furniture and commercial use. Its hydraulic-like operation method brings a luxurious feeling every time it is used, and it is a durable door accessory.

a.Universal Adaptability and Technological Inclusiveness
The 6-inch E-type damping hinge, with a split-structural framework, lowers operational thresholds, covers all application scenarios, retains high-precision damping, optimizes assembly/debugging via modular design, and breaks traditional dependence on environment and skills.

b.Stable Power Output and High-Durability Spring Assembly
The hinge’s 7mm ultimate stroke design ensures long-term power output stability, mitigates component fatigue-induced power decay, and maintains reliable damping performance over extended use.

c.Comprehensive Resolution of Cushioning Failure Risks
A key innovation is a modular damper system for inspection, monitoring, and component replacement, unlike traditional hydraulic hinges that need full replacement when buffers fail, causing high costs and downtime.

d.Zero Oil Leakage Design and Environmental Compatibility
This hinge’s oil-free power chamber is a key advantage over traditional hydraulic hinges, which rely on hydraulic oil (prone to leakage, degrading performance, causing environmental risks, and complicating maintenance).

e.Innovative Split Linkage Mechanism for Reduced Wear
At the core of the hinge’s durability lies its pioneering split linkage structure, a design breakthrough that minimizes component wear and friction-induced degradation. In traditional hinges, the spring, transmission shaft, and damper often operate in a mutually constrained, coaxial manner, leading to high linkage friction and accelerated wear of critical components.

With an innovative split design, it reduces component wear and boosts durability vs traditional integrated hydraulic hinges. The core series delivers 500,000 opening-closing cycles, far exceeding industry norms.

Adopts an oil-free power chamber configuration that eradicates the hazard of oil seepage—a long-standing drawback plaguing conventional hinges. Additionally, its springs and dampers are detachable and replaceable, substantially cutting down post-sales maintenance expenses for users.

Boasts a 4-in-1 integrated design (hinge, door closer, door stop, and positioner), obviating the requirement for extra independent components and streamlining both installation and usage processes.

Offers flexible angle customization: it accommodates a maximum opening angle of 175°, enables free positioning between 85° and 130°, and allows for effortless switching between two-stage force settings. Moreover, it maintains reliable performance within a temperature range of -37℃ to 60℃, making it adaptable to diverse climatic conditions.

Features user-centric installation: most models offer left-right universal compatibility, while select series incorporate a nail-pull non-adjustment design to boost operational efficiency. Complementing its functionality are four elegant color variants (Luxury Gold, Shining Silver, Moonlight Black, Phantom Gray), designed to harmonize with various decoration styles.

Backed by exclusive patents and cutting-edge 18.5mm small shaft diameter technology, the product ensures high technical value and strong market competitiveness, standing out as a leading solution in the architectural hardware sector.