Dual ear double acting hydraulic cylinder

Product Overview

This is a 'double acting single piston rod engineering hydraulic cylinder ', which adopts a double ear hinge ear （earring） installation structure at the upper and lower ends. The side of the cylinder body is integrated with an external oil pipe and belongs to a swing hydraulic actuator. By relying on hydraulic oil to enter the rodless and rodless chambers of the oil cylinder, the piston rod is driven to extend and retract, outputting thrust and tension in both directions to complete the lifting, flipping, pushing and pulling, and opening and closing actions of heavy objects. The hinge ear structure at both ends allows the oil cylinder to swing slightly with the load during operation, effectively avoiding problems such as cylinder blockage and jamming. It is very suitable for matching variable angle motion equipment such as car flipping, wing opening, and tailboard lifting. The overall surface is sprayed with industrial anti rust paint, which has a smooth appearance and is resistant to outdoor dust and rainwater corrosion. It is widely used in various specialized vehicles and construction machinery.

Product Structure and Material Description

1. * * Cylinder barrel * *: Made of precision cold drawn seamless steel pipe, the inner hole is polished with a mirror finish to achieve high smoothness and reduce friction loss of sealing components; The welding adopts robot ring seam welding, with uniform and full welds, no cracking under pressure, and no hidden oil leakage hazards.

2. * * Piston rod * *: Made of 45 # quenched and tempered steel, with a surface treated with hard chrome plating, the coating is uniform, the hardness is high, and it is wear-resistant, rust proof, and impact resistant. It is not easy to strain during long-term reciprocating motion; 40Cr alloy piston rods can be upgraded as needed for heavy-duty conditions.

3. * * Piston component * *: The piston is equipped with a wear-resistant guide ring to support the piston rod and prevent eccentric wear; Built in main seal and buffer structure, reducing the impact of piston rod to the end of stroke, protecting the oil cylinder and main engine structure.

4. * * Sealing system * *: standard NBR nitrile rubber+PU polyurethane combined seal, dust ring to prevent soil and sand from entering the oil cylinder, multiple sealing combination, high pressure resistance, anti-aging, reducing the probability of oil leakage; Upgradeable FKM fluororubber seal, suitable for high temperature and special hydraulic oil working conditions.

5. * * Two end hinged ears * *: The earring structure is forged as a whole, matched with pin holes, evenly stressed, and not easily deformed or broken; Optional joint bearings are available to reduce swing friction.

6. * * External side oil pipe * *: Side mounted integrated oil pipe, firmly welded with the oil port facing outward, convenient for hydraulic pipeline layout, on-site installation, and later maintenance.

2、 Core product features

✅ ** Bidirectional output, strong controllability * *: Double acting structure, extending provides lifting thrust, retracting provides recovery tension, lifting/flipping action is bidirectionally controllable, smooth action without impact.

✅ ** Double ear swing installation * *: The installation method of hinge ears on both ends of the earrings is adapted to the rotating mechanism of the equipment, and can adaptively swing the angle during operation, solving the problem of fixed oil cylinders being easily damaged by force.

✅ ** Side mounted oil pipe layout * *: The oil pipe is integrated on the side of the cylinder body, which does not occupy the center space of the oil cylinder. The main engine pipeline layout is simpler and easy to disassemble.

✅ ** Heavy duty and durable, leak proof * *: honing cylinder tube+multiple sealing combination, robot welding process, factory full pressure testing, to prevent weld seam leakage and rod head oil leakage.

✅ ** Factory pressure testing * *: Each oil cylinder undergoes a pressure holding test before leaving the factory, with a standard pressure of 16MPa and no leakage. The high-pressure version can reach up to 25MPa.

✅ ** Full specification non-standard customization: Cylinder diameter, rod diameter, stroke, installation center distance, oil port thread specifications, earring hole diameter, and oil pipe length can all be customized according to customer drawings or requirements.

3、 Applicable industries and equipment

-Special vehicles: Flying wing box truck, dump truck, truck tailboard, box garbage truck, sanitation flip truck, engineering cabin opening mechanism

-Construction machinery: small lifting platform, boarding bridge, flipping bracket, agricultural machinery equipment, orchard lifting device, livestock equipment flipping mechanism

-Industrial equipment: Box flipping fixtures, assembly line lifting mechanisms, hydraulic fixtures, various hydraulic systems that require swinging, pushing, and pulling

Installation and usage precautions

1. During installation, the upper and lower hinge pin shafts of the oil cylinder must be kept coaxial to avoid lateral bias during operation, which can quickly strain the piston rod and damage the seal.

2. The hydraulic system must be equipped with an oil filter device to keep the hydraulic oil clean. Impurities entering the cylinder can cause seal wear and internal leakage.

Before the first use, it is necessary to exhaust the air from the inner cavity of the oil cylinder to avoid shaking and crawling.

4. It is strictly prohibited to use beyond the rated pressure, as overloading can cause cylinder deformation and weld cracking.

5. Regularly check the lubrication of the pin shaft and the oil pipe joints for looseness and oil leakage and maintain them in a timely manner to extend their service life.

Service Description

Our factory is a manufacturer of hydraulic cylinders at the source. We can quickly calculate the specifications of the cylinders and provide drawings based on the installation dimensions, load weight, and stroke requirements provided by customers; Support customized drawings and sample replication. The product comes with a pressure test record at the factory, and after-sales technical support can be provided for non-human damage during the warranty period. We can provide bulk matching quotations. We welcome inquiries and negotiations from engineering, equipment manufacturers, and modification factories.