Damper

Abstract

A damping device for use in industrial machinery and tools comprising a housing ( 102, 602 ) and a flange member ( 104, 604 ) arranged in the housing, wherein at least portions of the flange member apart from the center thereof are composed of an elastic material and inclined with respect to the axial direction or the radial direction of the rotational axis and the flange member is so designed that the peripheral face thereof is brought into contact with the inner wall of the housing. This device can generate a damping force which may be drastically changed depending on the operating directions and thus permits stable damping. In the direct acting type one, the flange member ( 104 ) is tapered on the corresponding both faces towards the periphery thereof, it never requires the formation of any space for allowing any deformation on the largely deformed side, the device can thus be miniaturized in the axial direction and permits the reduction of the weight thereof and it can operate even in response to motions having a fine amplitude to thus show excellent damping characteristics. In the rotary type one, the flange member ( 604 ) comprises an engaging member capable of being engaged with a shaft body ( 603 ) and is provided with projected or convex portions ( 604 a) on its outer periphery. The projected portions are inclined towards the radial direction of the rotating shaft to thus efficiently show their excellent differential rotation-damping characteristics and the damping characteristics may arbitrarily be controlled. These damping devices can be used as dampers for suspensions of bicycles, rotary dampers applied to chairs and dampers for opening and closing doors.

Description

technical field [0001] The present invention relates to a damper device, in particular to a damper device used in industrial machines, which generates a damping force during the differential motion between two members, and can generate a damping force that is significantly different due to the direction of motion device. Especially suitable for damper devices that can damp linear reciprocating differentials and rotary differentials. Background technique [0002] As a damper device, there has been known a so-called linear motion type oil damper device that uses flow resistance such as oil, such as a shock absorber used in automobiles. This oil damper device has the following problems. [0003] (1) Since a flow path needs to be formed in the box, the structure is complicated and the manufacturing cost increases. [0004] (2) There are many fluids and internal components constituting the flow path, resulting in increased weight. [0005] For this reason, as a damper device ...

AI Technical Summary

Problems solved by technology

[0003] (1) Since the flow path needs to be formed in the box, the structure is complicated and the manufacturing cost is increased

[0004] (2) There are many fluids and internal components that constitute the flow path, and the weight increases

Therefore, since the crimping force between the inner wall surface of the box and the peripheral surface of the flange 23 is the largest at rest, the static friction is also relatively large. Especially when it is used as a cylindrical buffer (shock absorber), it is difficult to rotate in the direction of rotation. Therefore, the installation is not good

[0009] (2) Since the damping force is adjusted according to the ease of deformation of the flange 23, a space to allow deformation is required on the large deformation side

[0010] (3) Support plates made of stronger materials that can withstand deformation loads must be used

[0013] (1) Due to the need to form a flow path in the box, the structure is complex and the manufacturing cost is high

[0014] (2) There are many fluids and internal components that constitute the flow path, and the weight increases

[0015] (3) Since liquid seal gaskets, sliding gaskets, etc. are required to use fluids, high dimensional accuracy is required, and manufacturing costs increase

[0018] (1) Since only the contact part is simply provided, it cannot be provided with damping due to the directionality of the main body casing when it rotates

[0019] (2) Since the concave part is only provided in an attempt to reduce the contact area between the inner peripheral surface of the main body shell and the outer peripheral surface of the shaft in order to strive for stable braking force, the damping force can only be adjusted by increasing or decreasing the area of ​​the contact part. The damping force of the damper has been determined and cannot be adjusted during use

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