JPH08303448A - Cover for joint - Google Patents

Abstract

PURPOSE: To prevent generation of an inefficient work so that shortage of a band is noticed at assembling, prevent the band from rusting by sticking of moisture content and the like and from being injured due to contact with the other member, and prevent a fitting part from being injured by the angle part of the band and the like, by integrating the band with a cover main body. CONSTITUTION: This cover for joint is constituted by combining a band 6 with the fitting part 2 of a cover main body 1 through a flexible connecting part. In addition, an elastic ring 9a is buried in the band.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint cover. In particular, the present invention relates to a cover mounting portion that is mounted on a joint of an automobile, a construction machine or the like.

[0002]

2. Description of the Related Art As a conventional dust cover for a joint of this type according to the present invention, there is one as shown in FIG. 6, for example. That is, the ball joint 100 is composed of a socket 101 and a ball stud 103, and a ball portion 102 that is fitted into the socket 101 via the seat member 104 in a rotatable and swingable manner is provided at the tip of the ball stud 103. It is provided. And the ball 102
The cover body 105 made of a rubber material is assembled so as to cover the fitting portion of the. Grease 106 is enclosed in the cover body 105 in order to maintain the smooth operation of the ball stud 103.

The cover body 105 has one end attached to the outer periphery of the ball stud 103 and the other end attached to the socket 1.
01 is fixed. The fixing portion of the cover body 105 to the socket 101 has a locking groove 107 on the outer periphery of the socket 101 to prevent the ball joint 100 from coming off, the grease 106 flowing out, and the intrusion of foreign matter such as water. And the fixed end portion 1 of the cover body 105 is provided.
08 is locked and fixed. Furthermore, the metal band 109
Etc. are tightened from the outer peripheral side.

The cover body 105 is compressed by the knuckle arm 110, and the ball joint 100
The operation of is given a swing indicated by θ1 in the figure and a rotation indicated by θ2 in the figure.

The fixed end portion 108 of the cover body 105 having such a structure is fastened by a metal band 109 so as not to be separated from the socket 101, but water and dust adhere to the band 109. Therefore, rust occurs.

Further, in order to solve such a problem of rust, there is a cover body 105 shown in FIG. 7 which is known from Japanese Utility Model Laid-Open No. 3-51216.

In FIG. 7, a flange 111 is formed on the fixed end portion 108, and this flange 111 is
The tip 112 covers the band 109 so as to cover the band 109.
Close to 05.

[0008]

However, in the cover body 105, since the ball stud 103 pivots as the ball stud 103 swings as described above, the tip portion 112 of the flange 111 joined to the cover body 105 also comes into contact with the cover body 105. become. As a result, water or the like enters from between the joint surfaces of the tip portion 112 of the flange 111 and accumulates on the band 109 side, and the band 109 rapidly rusts.

Also, at the time of assembly, the band 109 and the cover body 1
05 are stored separately, so either one will run short,
It causes a problem that the assembly is not completed.

Further, since the band 109 is made of metal, it may rust during storage and quality control is difficult.

The present invention has been made in view of the above-mentioned problems, and its technical problem is to manage a pair of the cover body and the band as one body and prevent the band from rusting. And to prevent the band from being damaged by the contact of stones or the like.

[0012]

The present invention has been made to solve the above-mentioned problems, and its technical means is configured as follows. That is, a first aspect of the present invention is a joint cover that seals a connecting portion of a joint having a bearing and a shaft that fits and connects to the bearing, and has a mounting portion whose one end fits into a seating portion of the bearing. A cover body that has a flexible cover portion formed from the mounting portion and has a fitting portion that can be joined to the shaft at the other end has a mounting groove on the outer periphery of the mounting portion, and fits into the mounting groove. There is a band for fastening the mounting portion together, and the band is connected to the cover body by a flexible connecting portion. Further, in claim 2, an elastic ring is internally provided inside the band.

[0013]

In the joint cover of the present invention, since the connecting portion 7 which is integral with the mounting portion 2 is formed and the band 6 is provided at one end thereof, the band 6 is fitted into the mounting groove 4 of the mounting portion 2. By doing so, the mounting portion 2 can be fastened to the bearing 15. Therefore, after the cover main body 1 is assembled into the joint, it is noticed that the band is not attached, and it is not necessary to disassemble the joint and attach the band again.

[0014]

Embodiments of the joint cover of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a joint cover according to an embodiment of the present invention. In FIG. 1, a ball portion 20 is provided at one end of a shaft (hereinafter referred to as a ball stud) 17
And has a screw at the other end. The shaft portion 18 is provided between them. The fitting surface of the ball seat 19 slidably fitted into the ball portion of the ball stud 17 is formed as a spherical inner peripheral surface 26, and the outer circumference is integrally fixed to the bearing (hereinafter referred to as a socket) 15. There is. Also,
The ball seat 19 is supported by a support plate 21 attached to the socket 15. The support plate 21 is provided with an oil supply plug 25 so that oil can be supplied to the oil passage 24 side. Further, the support plate 21 is the ball seat 19
Is elastically supported. The ball seat 19 is made of a wear-resistant synthetic resin material, but may be made of oil-impregnated sintered metal.

Further, the socket 15 for integrally holding the ball seat 19 has a groove-shaped seating portion 16 on the outer periphery, and the seating portion 16 is formed so that the mounting portion 2 of the cover body 1 can be mounted. ing.

A screw is provided on one end of the ball stud 17, and the knuckle arm 22 fitted through the screw is fixed by a nut 23.

The cover body 1 is made of rubber or elastic plastic, has a mounting portion 2 at one end, and
It has a fitting portion 5 at the other end. The middle portion is formed into a flexible and curved cylindrical cover portion 3. Further, a film-shaped connecting portion 7 is formed at one end of the mounting portion 2, and a band 6 is provided at the other end. The connecting portions 7 may be formed in a band shape and arranged evenly along the drawing.

The band 6 is formed in a square shape in cross section, and is fitted into a mounting groove 4 having a U-shaped cross section formed on the outer peripheral surface of the mounting portion 2 to tighten the mounting portion 2 to the seating portion 16 of the socket 15. Is acting like.

On the other end of the cover body 1, a fitting portion 5 is provided.
Is formed, and is fitted and closely fitted to the shaft portion 18 of the ball stud 17. A reinforcing ring 14 is embedded in the fitting portion 5 to hold the fitting portion 5 so as not to deform. Further, a dust lip 8 is provided on the upper surface of the fitting portion 5 so as to be joined to the lower surface 22a of the knuckle arm 22.

Lubricating oil A is present in the cover body 1 to provide lubrication for the sliding surface. Then, the ball stud 17 fits into the socket 15 and swings,
The cover body 1 is also formed to be elastically deformed. At the same time, the fitting portion 5 seals the ball stud 17 by the two sealing lips so that the lubricating oil A does not flow out. In addition, the dust lip 8 includes a knuckle arm 22.
It is in close contact with the lower surface 22a to prevent dust and water from entering from the outside.

Further, the mounting portion 2 of the cover main body 1 is fitted into the seating portion 16 of the socket 15 and is fitted into the mounting groove 4 on the outer periphery of the mounting portion 2 by the band.
It can be strongly tightened. The lubricating oil A in the cover body 1 is prevented from flowing out and the elastic deformation of the cover body 1 on the fitting portion 5 side is supported.

FIG. 2 is a sectional view of a joint cover according to another embodiment of the present invention.

2 is different from FIG. 1 in that the mounting groove 4 is formed in a semicircular shape in the mounting portion 2 of the cover body 1 and the band is formed in a circular shape in cross section. That is.

The band 6 has a garter spring 9a embedded therein, and the mounting portion 2 of the cover body 1 is strongly tightened to the seating portion 16 by the tightening force of the garter spring 9a.

FIG. 3 is a sectional view of a joint cover according to still another embodiment of the present invention.

3 is different from FIG. 1 in that the seat portion 16 is formed in a groove shape on the outer peripheral surface of the socket 15. Then, the annular convex portion provided on the mounting portion 2 of the cover body 1 is fitted into the seat portion 16, and
That is, the band 6 is fitted in the mounting groove 4 provided on the outer peripheral surface of the mounting portion 2. Further, an elastic ring 9b, which is cut at one place like a piston ring, is embedded in the band 6. Then, the mounting portion 2 is strongly fastened to the seating portion 16 by the elastic ring 9b.

FIG. 4 is a sectional view of a joint cover according to still another embodiment of the present invention.

4 is different from FIG. 1 in that the cover body 1 is made of a resin material. This resin material is an elastic plastic and is formed by injection molding.
Since the cover body 1 is made of elastic plastic, the cover body 1 is attached to the seating portion 16 of the socket 15.
The mounting portion 2 of is firmly fitted. Further, since the mounting portion 2 is strongly tightened to the seating portion 16 by the band 6, the mounting portion 2 is securely fitted.

Since the cover body 1 is made of an elastic plastic material, it is less likely to be damaged by stones or contact with other members. In particular, it has excellent durability compared to rubber materials.

FIG. 5 is a sectional view of a joint cover according to still another embodiment of the present invention.

5 is different from FIG. 1 in that an elastic ring 9a, which is a garter spring, is embedded in the band 6 of the cover body 1, and a protection plate 13 is provided at one end of the band 6. The protection plate 13 covers a portion that is most likely to be damaged by being stoned from the outside. When the cover body 1 receives a stone, the place where the socket 15 is located inside the cover body 1 cannot be elastically deformed, and is damaged. This is prevented by the protection plate 13, and the mounting portion 2 is protected.

Further, even if the fitting portion 5 side of the cover body 1 is elastically deformed by the swing of the ball stud, the protective plate 13 prevents the mounting portion 2 side from being elastically deformed, and is separated from the seat portion 16. To prevent the operation.

[0034]

The joint cover of the present invention has the following effects. That is, a) The cover body and the band are integrally molded, so when the cover body is assembled to the device, it is possible to detect that the band is insufficient and prevent a reduction in production efficiency such as repurchasing. . B) Since the band is integrally formed by the connecting part on the mounting side of the cover body, after installing the cover body, notice that the band is not inserted, remove the cover body again, and rotate the band. It is possible to prevent inconsistencies in the assembly procedure such as inserting into. C) Since the band is made of rubber or resin material, even if force is applied to the mounting part due to the swinging of the cover body, the band may crack and damage the mounting groove of the mounting part. It can be prevented. D) Since the band is made of rubber or resin material, it can be prevented from being damaged by rust. In particular, as in claim 2,
When the elastic ring is embedded in the band, the elastic ring can tighten the mounting portion strongly and prevent the mounting portion from being damaged by the corner portion of the elastic ring. E) Since the elastic ring is embedded in the band, it prevents rusting and improves durability. Further, since the elastic ring is embedded in the band, it is possible to prevent the elastic ring from being damaged due to contact with a running stone or the like and being damaged.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a joint cover according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a joint cover according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a joint cover according to still another embodiment of the present invention.

FIG. 4 is a sectional view of a joint cover according to still another embodiment of the present invention.

FIG. 5 is a sectional view of a joint cover according to still another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a conventional dust cover for a joint.

FIG. 7 is a cross-sectional view of a main part of a mounting portion of a cover body of a conventional example.

[Explanation of symbols]

 1, 105 …… Cover body 2 …… Mounting part 3 …… Cover part 4 …… Mounting groove 5 …… Mating part 6,109 …… Band 7 …… Coupling part 8 …… Dust lip 9 …… Elastic ring 9a …… Elastic ring (garter spring) 9b …… Elastic ring (split ring) 13 …… Protective plate 14 …… Reinforcing ring 15,101 …… Socket (bearing) 16 …… Seat part 17,103 …… Ball stud (shaft) ) 18 ... Shaft part 19 ... Ball seat 20 ... Ball part 21 ... Support plate 22, 110 ... Knuckle arm 22a ... Lower surface 23 ... Nut 24 ... Oil passage 25 ... Oil filler plug 26 ... Spherical Inner peripheral surface 100 ...... Ball joint 102 ...... Sphere 104 ...... Seat member 106 ...... Grease 107 ...... Locking groove 108 ...... Fixed end 111 ...... Flange 112 ...... Tip

Claims (2)

[Claims] 1. A cover for a joint that seals a connecting portion of a joint having a bearing and a shaft that fits and connects to the bearing, and has one end fitted to a seating portion (16) of the bearing (15). Has a mounting portion (2) for forming a flexible cover portion (3) from the mounting portion (2), and the shaft (1) at the other end.
The cover main body (1) having a fitting portion (5) capable of being joined with 7) has a mounting groove (4) on the outer periphery of the mounting portion (2), and is fitted into the mounting groove (4) to be mounted. Department (2)
A cover for a joint, characterized in that it has a band (6) for fastening the band, and the band (6) is connected to the cover body (1) by a flexible connecting part (7). 2. The cover for joints according to claim 1, wherein the band (6) has an elastic ring (9) therein.