SHAOYANG TONGDA AUTO PARTS MANUFACTURING CO., LTD

Support gas spring

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+86-739-5656777

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Product Introduction

Gas spring, also known as free-type gas spring, or support rod, is an industrial accessory that can support, buffer, brake, height adjustment and angle adjustment.

The gas spring is an elastic element that uses gas and liquid as the working medium. It is composed of a cylinder, a piston, a piston rod and a number of couplings. The inside is filled with nitrogen, and the pressure in the cavity is higher than atmospheric pressure. Through holes or diversion grooves are processed on the inner wall of the cylinder, the gas pressure at both ends of the piston is equal, and the cross-sectional areas on both sides of the piston are different, the pressure to the side with the small cross-sectional area is generated, that is, the elastic force of the gas spring, and the movement of the piston rod is realized by the elastic force.

Product Schematic Diagram

Scope of application

Gas springs are widely used in automobiles, aviation, rail vehicles, engineering machinery, medical equipment, furniture and home appliances and other fields.

In the automotive industry, the main application scenarios are the opening of the hood and tailgate.

Classification of air spring arrangement

	flip type	Lifting and extension type
Schematic Diagram
Description	The upper end of the gas spring is fixed on the side wall, and the lower end is fixed on the door (see the figure above). During the opening process, the piston rod gradually changes from below the cylinder to above the cylinder	The lower end of the gas spring is fixed on the side wall, and the upper end is fixed on the door (see the figure above). During the opening process, the piston rod is always located below the cylinder
Advantages	1. The adjustable space is relatively large when arranged; 2, the surrounding space interference is small;	1. The force value of the gas spring is relatively small, and the impact on the hinge is small;
Disadvantages	1. The force value of the gas spring is large, and the strength of the hinge is high;	1, layout space is relatively easy to be restricted, is not conducive to later adjustment 2. The working stroke of the gas spring is small 3, no hydraulic oil area lubrication effect is poor, easy to produce noise

Classification of Damping Modes of Gas Spring

constant damping

The damping effect is achieved by damping the speed at which the oil flows through the piston small hole. The diameter of the piston small hole, the amount of hydraulic oil and the consistency determine the damping effect curve. Generally, damping is achieved at the extended end of the gas spring, so that the gas spring is at its extended end. Realize steady deceleration until it stops.

variable damping

Variable damping is achieved by opening a groove in the wall of the pressure tube, and the depth of this groove can control the damping effect and the elastic velocity. By increasing or decreasing the cross-sectional area of the groove, the speed of the piston rod can be customized within the entire stroke range, so as to meet the customer's customization requirements. The elastic extension process can be slowed down very slowly until it stops. We can also achieve different compression and elastic extension damping characteristics.

Product selection

Demand docking

The customer provides the data needed for synchronous development:

♦Maximum opening angle of tailgate (or bonnet);

♦Tailgate (or bonnet) weight;

♦Center of gravity coordinates of tailgate (or bonnet);

♦Center coordinates of tailgate (or bonnet) hinge;

♦Coordinates of tailgate (or bonnet) opening point;

♦Tailgate (or hood) closing point coordinates;

♦Gas spring body side installation coordinates;

♦Coordinates of the air spring tailgate side (or bonnet side) mounting point;

♦High and low temperature requirements of the vehicle;

Design parameter output

Division I output relevant design data:

♦Installation center distance;

♦Travel;

♦Cylinder outer diameter D1;

♦Diameter of piston rod D2;

♦F1 force value;

♦Maximum opening force of the door at normal temperature;

♦Maximum closing force of the door at normal temperature;

♦Balance angle;

♦Low temperature lifting status;

♦Gas spring opening and closing door force curve.

Force Value Definition

♦In the process of compression, when the gas spring is only compressed by 10mm, it stops for 3 seconds, and the measured force value is F3;

♦During the compression process, when the compression of the gas spring is 10mm, pause for 3 seconds, and the measured force value is F4;

♦In the process of extension, when the gas spring only extends 10mm, pause for 3 seconds, and the measured force value is F2;

♦During the extension process, when the gas spring has 10mm left in extension, pause for 3 seconds, and the measured force value is F1;

♦Fa (nominal force) =(F3 F1)/2, Fb (nominal force) =(F4 F2)/2;

♦Fr (dynamic friction) = (F3-F1)/2;

♦a (elastic ratio) = Fb/Fa;

♦Gas spring extension speed V

Our regular products

According to the analysis results (gas spring force value, length, and tailgate size) for selection, our regular models are as follows:

Inner diameter of cylinder (mm)	Wall thickness of cylinder (mm)	Diameter of piston rod (mm)	Maximum nominal force (N)	Maximum installation center distance (mm)	gas spring structure
Φ 13	1	φ6	200	200	constant/variable damping
Φ 16	1~1.2	φ8	600	600	constant/variable damping
φ18	1~1.2	φ8	650	600	constant/variable damping
φ20	1~1.5	φ10	850	800	constant/variable damping
φ20	1~1.2	Φ 12	900	800	constant/variable damping
φ25	1.5	φ14	1200	1200	constant/variable damping

Key words:

Nitrogen balance cylinder

气弹簧

Nitrogen balance cylinder

气弹簧

Contact Information

Tel: +86-739-5656777

E-mail：sytd@sytd.net

Company address: Shaoyang Avenue, Economic Development Zone, Shaoyang City, Hunan Province ,China

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by:www.300.cn Changsha

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