JPH0325451Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a circular bushing.

(Prior Art) Ring bushings, in which an elastic member is interposed between an inner cylinder and an outer cylinder, are widely used, for example, at the joints between links and body frames that make up the suspension structure of vehicles, and at the joints between links. There is.

In the ring bushing used in the suspension structure of such a vehicle, the elastic member undergoes deformation such as rocking, twisting, and axial movement.

(Problem to be solved by the invention) Therefore, with an elastic member in which a space is formed, if pebbles, mud, etc. get into the space while the vehicle is running, the function of the ring bushing cannot be effectively demonstrated. There were problems such as the inability to increase the durability of the bushing.

The present invention was devised in view of the above circumstances, and the purpose of the present invention is to remove pebbles into the space,
To provide a ring bushing that can prevent mud etc. from entering, effectively exhibit its functions, and improve durability.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention attaches a flexible cover 21 to the end face of the ring bushing 2 to cover the end face 13a of the elastic member 13. It is characterized by providing a through hole 21e.

(Function) Since the cover 21 is flexible, the elastic member 13
The end face 13a of the elastic member 13 is always covered by following the deformation movements such as rocking, twisting, and axial movement of the space part 14.
This prevents pebbles, mud, etc. from entering the ring bushing 2, allows the ring bushing 2 to function effectively, and greatly improves durability.

Further, the through hole 21e provided in the cover 21 allows internal water to be discharged, and also serves as a breather for the internal air when the elastic member 13 is elastically deformed.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view from the rear side of the independent rear suspension structure, and FIG. 2 is a cross-sectional side view of the ring bushing.

Reference numeral 1 designates a trailing arm, the front end of which is connected to the vehicle body via a ring bushing 2, and the rear end is rigidly connected to a knuckle 3.

The knuckle 3 is connected to the vehicle body by front and rear lower arms 4 and 5, and a shock absorber 6 is disposed between the front and rear lower arms 4 and 5 and is connected to the knuckle 3.

The knuckle 3 has an arm portion 3a extending upward.
The arm portion 3a is connected to the vehicle body via an upper arm 7, and in the figure, 8 represents an axle and 9 represents a stabilizer.

The ring bushing 2 includes an inner cylinder 11, an outer cylinder 12,
It is composed of an elastic member 13 such as rubber baked between the inner and outer cylinders 11 and 12, and a plurality of spaces 14, which are spaced apart in the circumferential direction and penetrate in the axial direction, are formed on the outer periphery of the elastic member 13. .

Elastic members 1 are provided on both end surfaces of the ring bushing 2, respectively.
Attach the covers 21, 21 that cover the end surfaces 13a of 3.

The cover 21 is made of an elastic material, and has an inner peripheral portion 21.
A is fitted into the inner cylinder 11, the outer peripheral part 21b is fitted into the outer cylinder 12, and attached to the ring bushing 2. In the embodiment, a folded portion 21d is formed on the circumferential surface 21c connecting the inner and outer circumferential portions 21a and 21b in order to improve the ability to follow the deformation movement of the elastic member 13, and one cover 21 is provided with a folded portion 21d to drain water etc. A through hole 21e was formed.

Since the present embodiment is configured as described above, the covers 21, 21 always cover the end surface 13a of the elastic member 13 by following the deformation movements of the elastic member 13, such as rocking, twisting, and axial movement. The covers 21, 21 prevent pebbles, mud, etc. from entering the space 14, allowing the ring bushing 2 to perform its functions effectively, and further improving drainage performance and the like, thereby significantly increasing durability, etc. I can do it.

(Effect of the invention) As is clear from the above explanation, according to the invention,
It is possible to prevent pebbles, mud, etc. from entering the space formed in the elastic member of the ring bushing, to allow the ring bush to perform its functions effectively, and to improve durability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view from the rear side of the independent rear suspension structure, and FIG. 2 is a cross-sectional side view of the ring bushing. In the drawings, 1 is a trailing arm, 2 is a ring bushing, 11 is an inner cylinder, 12 is an outer cylinder, 13 is an elastic member, 14 is a space, and 21 is a cover.

Claims (1)

[Claims for Utility Model Registration] An annular bushing in which an elastic member is interposed between an inner cylinder and an outer cylinder, and a space is formed in the elastic member, wherein an end face of the annular bushing is provided with a flexible member that covers an end face of the elastic member. A ring bushing characterized in that a flexible cover is attached and a through hole is provided in the cover.