Dampers and Shock Absorbers

With our dampers, you can add a sophisticated and smooth soft-closing movement to your lid closing design. Takachiho America's dampers utilize the braking force that is generated by the silicone oils velocity resistance to provide the soft-closing feature. We offer Rotary, Linear (shock absorbing), Disk, and other various types of dampers to suit your needs and will work with you to recommend the best dampers for your innovative designs.

For more detail, CAD data, customized spec requests, please contact us.

Read instructions before use (Rotary Dampers)

Read instructions before use (Shock Absorbers)

See (Reference Table for the Selection of Rotary Dampers)

See (Selection Method for Shock Absorbers)

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Basic Structure

This is a rotary damper that utilizes the braking force generated by the oil's viscosity resistence. The braking force generated by oil viscosity, clearance between the rotor and the main body, and the oil's contact area varies based on the structure shown above.

1-1) Temperature characteristics
The torque of a rotary damper varies according to the ambient temperature. This is because the viscosity of the oil inside the damper changes according to the temperature.

1-2) Speed characteristics
The braking torque of a rotary damper varies according to the cycle rate. In general, the torque increases when the cycle rate increases, and the torque decreases when the cycle rate decreases. The rated torque listed in the catalogue is the torque generated when the cycle rate is 20rpm.

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Basic Structure

This is a rotating-type damper that utilizes the oil pressure. The braking force generated by oil viscosity, clearance between the rotor and the main body, and the vane's pressure-receiving area varies based on the structure shown above.

Basic characteristics

Similar to the rotary damper, the torque varies according to the ambient temperature. Its basic structure is a dashpot structure (single orifice). The internal pressure of a damper increases as the ratation speed increases, which consequently increases the torque.

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As shown below, when an object hits the piston rod, the motion is transferred to the oil in the pressure chamber through the piston rod. As a result, the oil inside the pressure chamber flows out of the orifices located in the inner tube. This causes compression in the pressure chamber. The product of this hydraulic pressure and the pressureapplied area of the piston is resistance, which acts on the colliding object. Linear dampers use this resistance to apply the brake to the colliding object, slowing it down. The hydraulic pressure generated inside the pressure chamber is proportional to the square velocity of the colliding object, as long as the orifice size, oil viscosity, etc. are constant. This is called velocity-squared resistance.

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For more details, CAD data, customized spec requests, please contact us.