JPH0558995U - Friction damper - Google Patents

Abstract

(57) [Summary] [Purpose] The initial appropriate frictional force of the friction damper can be maintained for a long time. [Structure] A friction damper 3 for giving an appropriate damper force when opening and closing an automobile glove box, a cylindrical body 7 having a bottomed cylindrical shape, and a lid-shaped body 8 assembled so as to cover its axially open end surface. And a shaft 5 supported by the damper body 4 so as to reciprocate in the axial direction thereof. An O-ring 11 capable of generating frictional force between the shaft 5 and the shaft 5 by sliding relative to the outer peripheral surface of the shaft 5 as the shaft 5 reciprocates is provided in the damper body 4, and further in the damper body 4. Is provided with a felt 9 that surrounds the outer peripheral surface of the shaft 5.
Let the grease soak into. Since the outer peripheral surface of the shaft 5 that reciprocates as the lid is opened and closed is thinly coated with grease and wiped off, the initial frictional force is stably maintained for a long period of time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction damper, and more particularly to a friction damper of a type in which a damper effect is generated by a frictional force generated between a casing and a shaft reciprocally received in the casing by relative displacement.

[0002]

[Prior Art]

 Conventionally, there are various dampers, but there is a friction damper that produces a damper effect by a frictional force between two members that are relatively displaced. As an example of using a friction damper, in a glove box of an automobile, the box main body and the lid are hinge-joined at the lower edges of both to open the lid toward the front side. An O-ring, which connects one end of the shaft and allows the shaft to be reciprocally inserted, is attached to the box body via its holding casing, and between the shaft and the O-ring that reciprocate as the lid opens and closes. There is a frictional force that creates a damper effect, giving a heavy feeling to opening and closing the lid.

However, the friction damper having the above-described structure has a problem that wear powder of the O-ring adheres to the surface of the shaft due to repeated use over a long period of time, resulting in a slow operation speed when opened.

In order to prevent abrasion powder of the O-ring, it is sufficient to apply grease to the shaft, but since the O-ring scratches and removes the grease on the shaft surface each time it is used, a proper friction force is always secured. In order to do so, regular repair is necessary. Therefore, if the repair is not performed, the same problem as described above occurs, and there is a problem that the initial appropriate frictional force cannot be maintained for a long period of time. There is also a problem that the repair time varies widely.

[0005]

SUMMARY OF THE INVENTION In view of the problems of the prior art as described above, a main object of the present invention is to provide a friction damper improved so as to maintain an appropriate initial friction force for a long period of time. To provide.

[0006]

[Means for Solving the Problems]

 According to the present invention, such an object is to provide a casing, an O-ring member held in the casing, a shaft reciprocally inserted into the O-ring member, and a casing held in the casing. And a porous material containing a lubricant, and a friction damper.

[0007]

[Action]

 By doing so, the lubricant such as grease contained in the porous material can be thinly spread on the surface of the shaft each time the shaft reciprocates, and the frictional force generated by the sliding contact between the O-ring and the shaft can be reduced. It can stabilize.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an essential part of an automobile glove box to which the present invention is applied. This glove box is connected to the box body 1 fixed to the instrument panel and pivotally or hinged at the lower edge of the front surface of the storage part so that it can be opened and closed in the direction shown by arrow A in the figure. It is composed of a closed lid 2 and a friction damper 3 for giving an appropriate damper force when the lid 2 is opened and closed.

The friction damper 3 is a cylindrical casing 4 made of a synthetic resin material fixed to the box body 1, and is supported by the casing 4 so as to be reciprocally movable in the axial direction thereof. One end of the friction damper 3 is a free end portion of the lid 2. And a metal arcuate shaft 5 pivotally attached to the. A locking leg piece 4a that projects outward in the radial direction is integrally formed and provided at an intermediate portion of the outer peripheral surface of the casing 4, and the locking leg piece 4a is provided on a side wall of the box body 1. A casing 4 is fixed to the box body 1 by elastically engaging with the stop hole 1a.

The shaft 5 is bent along the opening / closing direction of the lid 2, and is in an L-shape as shown in the drawing in a direction orthogonal to a plane including the bent portion. One end is bent. The bent end of the shaft 5 is rotatably supported by an Ω-shaped pivot bracket 6 fixed to the rear surface of the shaft 2, which faces upward when the lid 2 is opened.

As shown in FIG. 2, the casing 4 is composed of a tubular body 7 having a bottomed tubular shape and a lid body 8 assembled so as to cover the axially open end face thereof. A pair of locking holes 7a penetrating in the radial direction and symmetrically arranged with respect to the axis are provided in an intermediate portion of the peripheral wall portion of the tubular body 7, and the lid-shaped body 8 is provided with an outside thereof. A pair of elastic engagement pieces 8a extending from a symmetrical position with respect to the peripheral edge axis along the axis are provided. By elastically engaging the elastic engagement pieces 8a with the locking holes 7a, The tubular body 7 and the lid body 8 are coaxially coupled to each other.

In the casing 4, a cylindrical felt 9 as a porous material is coaxially received on the bottom side of the tubular body 7, and an annular O-ring support made of synthetic resin is supported on the lid body 8 side. The member 10 is received coaxially. For example, grease as a lubricant is impregnated in the felt 9. The O-ring support member 10 is formed so as to have a concave cross-section whose one end in the axial direction is open, and the rubber O-ring 11 as an O-ring member is coaxially received in the concave portion. There is.

A shaft insertion hole 7 b is provided at the center of the lower wall of the tubular body 7, and a shaft insertion hole 8 b is also provided at the center of the lid body 8. The shaft 5 is assembled so as to coaxially penetrate the inside of the casing 4 via both shaft insertion holes 7b and 8b, and the O-ring 11 is inserted while slidingly contacting the shaft 5. Further, the felt 9 is surrounded so that the outer peripheral surface of the shaft 5 in the casing 4 can be slidably contacted. An E-ring 12 is attached to the free end of the shaft 5 so that the shaft 5 that reciprocates as the lid 2 opens and closes is prevented from coming off, and the fully open position of the lid 2 is determined.

In the main friction damper 3 assembled in this way, the shaft 5 that reciprocates in the axial direction with the opening and closing of the lid 2 as described above is slidably contacted with the O-ring 11 so that A frictional force generated between them causes a damper action for opening and closing the lid 2. Since the grease contained in the felt 9 is thinly applied to the surface of the shaft 5 as the friction damper 3 reciprocates relative to the shaft 5, abrasion powder of the O-ring 11 can be prevented and generated. You can also wipe off the grease that has been removed. Therefore, the shaft surface can always be kept in a suitable state, and the initial appropriate frictional force can be held for a long period of time.

[0015]

[Effect of the device]

 As described above, according to the present invention, by containing the lubricant such as grease in the porous material, the lubricant is thinly applied to the surface of the shaft every time the shaft reciprocates, and the surface of the shaft is wiped off. Since it is possible to maintain the shaft surface in a suitable state at all times and to maintain the initial appropriate frictional force for a long period of time, it is possible to prevent the generation of wear powder of the O-ring, and to improve the durability and durability of the friction damper. The stability of the damper action can be greatly improved.

[Brief description of drawings]

FIG. 1 is an assembled perspective view of a friction damper according to the present invention applied to a glove box of an automobile.

FIG. 2 is a vertical sectional view of a friction damper.

[Explanation of symbols]

 1 Box Main Body 1a Locking Hole 2 Lid 3 Friction Damper 4 Casing 4a Locking Leg Piece 5 Shaft 6 Pivot Bracket 7 Cylindrical Body 7a Locking Hole 8 Lid Shape 8a Elastic Engaging Piece 9 Felt 10 O-Ring Supporting Member 11 O-ring 12 E-ring

Claims (1)

[Scope of utility model registration request] 1. A casing, an O-ring member held in the casing, a shaft reciprocally inserted into the O-ring member, and a porous member held in the casing and containing a lubricant. A friction damper characterized by having a quality material.