Home / Products
About Us
Zhejiang Oulida Hydraulic Machinery Co., Ltd.
Zhejiang Oulida Hydraulic Machinery Co., Ltd.
Zhejiang Oulida Hydraulic Machinery Co., Ltd. is located in Fuyang District, Hangzhou City, Zhejiang Province. The company was established in 1993 and specializes in the development and production of gas springs. In 2012, we invested 72 million yuan to build a new forest chemical factory covering an area of 25,000 square meters. We have introduced advanced automated production lines, with a single-shift capacity of 20,000 units and an annual capacity of up to 6 million units, making us one of the largest factories in the industry domestically and internationally. OEM/ODM Automotive Gas Struts Manufacturers and Automotive Gas Springs Suppliers in China.
Currently, our gas springs are widely used in engine hoods, doors, and other support systems in various applications, including automotive, construction machinery, and textile industries, both domestically and internationally. In 2017, we established a cooperative management system called DMC (Design-Manufacture-Cooperate) in collaboration with DEFTA from France and MICHANG from South Korea. This collaboration focuses on design, development, and production, leveraging the expertise and management technology of DEFTA and MICHANG in supporting European, Japanese, and American systems, enhancing Oulida's capabilities in various aspects. Supply IATF 16949 certified gas spring struts.
In July 2021, our company drafted and officially released the industry standard QC/T 207 "General Gas Springs for Automobiles."
Industry knowledge
How do automotive gas springs function in automotive components?
Automotive gas springs also known as gas struts or gas lift supports, work based on the principles of gas compression and expansion to provide controlled movement and support to various components in vehicles. These components may include hoods, trunk lids, tailgates, and convertible tops.
Automotive gas springs consist of a cylindrical tube housing a piston and a rod assembly. The tube is filled with compressed nitrogen gas and sealed to prevent leakage. The piston separates the gas and oil within the tube.
When the gas spring is compressed, such as when you close the trunk lid, the piston moves inward, compressing the nitrogen gas inside the tube. As the gas is compressed, it exerts force on the piston, resisting further compression and providing a cushioning effect.
As the gas spring expands, such as when you open the trunk lid, the compressed gas pushes against the piston, causing it to move outward. The gas's pressure and the piston's movement provide controlled and gradual support, helping to lift and hold the weight of the component, such as the trunk lid, in an open position.
Automotive gas springs often incorporate damping mechanisms, such as valves or orifices, to regulate the speed of movement and prevent sudden jolts or rapid acceleration. This damping effect ensures smooth and controlled operation when opening or closing vehicle components.
Automotive gas springs are designed with specific load capacities and stroke lengths to suit different vehicle applications. The load capacity refers to the maximum weight the gas spring can support, while the stroke length is the distance the piston can travel within the tube.
Automotive gas springs provide reliable support, controlled movement, and damping characteristics to various vehicle components, enhancing convenience, safety, and user experience. They are integral components in modern automotive design, contributing to smoother operation and improved functionality.

What factors determine the selection of automotive gas springs? 
Several factors influence the selection of automotive gas springs for specific applications:
Load Capacity, The load capacity of the gas spring must match or exceed the weight of the component it will support, such as the hood, trunk lid, or tailgate. It's crucial to consider the weight of the component along with any additional loads, such as accessories or cargo, that may be placed on it.
The stroke length refers to the distance the piston can travel within the gas spring tube. It's essential to select a gas spring with a stroke length that accommodates the range of motion required for the application, ensuring proper functionality and clearance.
 Gas springs can be mounted in various orientations, including vertical, horizontal, or angled positions. The mounting orientation influences the gas spring's performance, including its load capacity, damping characteristics, and overall effectiveness. Selecting the appropriate mounting orientation ensures optimal operation and longevity.
Consider the operating environment where the gas spring will be installed. Factors such as temperature extremes, exposure to moisture, chemicals, or other contaminants can affect the performance and durability of the gas spring. Choose gas springs with suitable materials, seals, and coatings to withstand the specific environmental conditions.
Some automotive applications may require gas springs with specific damping characteristics to control the speed and smoothness of movement. Consider the desired damping level, whether it's soft, medium, or firm, and select gas springs with appropriate damping mechanisms, such as valves or orifices, to meet the requirements.
Select gas springs from reputable manufacturers known for their quality, reliability, and durability. Consider factors such as corrosion resistance, fatigue resistance, and warranty coverage to ensure long-term performance and customer satisfaction.
Evaluate the installation requirements and constraints, including space limitations, mounting hardware compatibility, and accessibility for maintenance or replacement. Choose gas springs that are compatible with the installation location and provide ease of installation and servicing.