Hydraulic Dampers, Indian Manufacturer, Indian Supplier,Indian Exporters
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Hydraulic Dampers
Hydraulic Dampers


A hydraulic damper has a valve mechanism adapted to generate a damping force during extension and contraction strokes of the damper. The valve mechanism includes a disc valve assembly consisting of a main disc valve for generating a damping force and an orifice for generating a damping force in low operation speed region of the damper. The orifice is provided with an additional disc valve for controlling the damping force generated.

The present invention has been accomplished in view of the problems described above and the object of the invention is to provide a hydraulic damper wherein damping force characteristics can be controlled for the low operating speed region, namely for the region in which a damping force is generated by an orifice. To solve this problem and to accomplish the object mentioned above, this invention provides a hydraulic damper comprising a valve mechanism for generating a damping force during the extension and contraction strokes of the damper, the valve mechanism including a disc valve assembly consisting of a main disc valve means for generating a damping force and an orifice means for generating a damping force in a low operating speed region of the damper, characterized in that the orifice means is provided with an additional disc valve for controlling the damping force generated by the orifice means. In a hydraulic damper according to the present invention, a damping force is generated by an orifice through which oil flows in a low operating speed region in which the operating speed of the damper is low.

At that time, an additional disc valve gradually opens to generate a damping force as the oil flow speed increases. In the low operating speed region, therefore, two kinds of damping forces are simultaneously generated by the orifice and the additional disc valve, and the damping force characteristics in the low operating speed area are determined by these two kinds of damping forces. It is therefore possible to establish desired damping force characteristics in a low operating speed region by selecting an additional disc valve having an appropriate spring constant and the spring force. A hydraulic damper for use in an automobile is employed in order to soften shocks imparted by the road surface so as to ensure a comfortable ride, and the damper also aims to improve the durability of the body of the automobile as well as to improve the condition of contact between the tires and the road surface so as to improve the operating characteristics and stability of the automobile. In these circumstances, therefore, it is necessary to design the damping force characteristics of the hydraulic damper according to the weight, steering characteristics of the automobile, and so on.



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Hydraulic Dampers, Indian Manufacturer, Indian Supplier, Indian Exporters