JPH0710684U - Spherical joint - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to flexibly swing in any direction and to prevent abnormal noise from leaking. In a spherical joint connecting the first exhaust pipe 1 and the second exhaust pipe 3, an inner flare portion 2 is provided at an end of the first pipe body.
The first outer flare portion 6 is provided on the second tubular body side, and the flange having the second outer flare portion 11 is further provided,
By inserting the spherical spherical ring-shaped seal bearings 15 and 16 supported by the respective outer flare portions between the inner flare portions, the inner flare portions are held by the seal bearings. And the second exhaust pipe are bent in either direction and have the same flexibility. Also, since the inner flare slides on the inner diameter surface of the seal bearing, even if abnormal noise occurs due to slippage, the seal bearing and the outer flare on the outer side of the seal flare are sufficiently damped to prevent leakage to the outside. small.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spherical joint used for connecting pipes such as an exhaust pipe of a vehicle.

[0002]

[Prior art]

 As a conventional joint of this type, for example, there is one disclosed in Japanese Utility Model Publication No. 1-41855 used for an exhaust system of an automobile. As shown in FIG. 2, the first flange 22 and the second flange 24 are fixed to the ends of the first and second exhaust pipes 21 and 23, respectively, and seal bearings are provided between the two facing each other. 25 are arranged.

The seal bearing 25 is in the shape of a truncated sphere, its spherical surface portion 26 is directed toward the second flange 24 side, and the second flange 24 is formed with a flare portion 27 corresponding to the spherical surface portion. . The first flange 22 and the second flange 24 are elastically tightened and connected by bolts and nuts 29 with a spring 30 interposed. As a result, when the first and second exhaust pipes 21 and 23 are connected to each other due to variations in angle, vibration during traveling, and the like, the spherical portion 26 and the flare portion 27 are swung by the slip. It is intended to secure the sealing performance while absorbing. In addition, a similar spherical joint structure is disclosed in Japanese Utility Model Laid-Open No. 59-163121.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional spherical joint, the two exhaust pipes are connected at the upper and lower parts around the pipe axis, and the seal bearing is pressed axially between the two flanges. It can swing relatively softly in the left-right direction using the line connecting the connection points as the hinge axis, but even if there is a spring in the up-down direction, the spring force is hard, so the flexibility is poor. There's a problem.

Further, although abnormal noise is generated between the spherical surface portion of the seal bearing and the flare portion corresponding thereto due to mutual slip, the seal bearing has the first exhaust pipe tip portion and the flat wall of the flange. Since the spherical surface is supported by and the outer surface is an outer peripheral surface, the abnormal noise is radiated to the outside directly through the flare portion of the flange on the second exhaust pipe side, and noise is not reduced. I also have. Therefore, in view of the above-mentioned conventional problems, the present invention has a spherical joint that has a flexible rocking characteristic in any direction and effectively prevents leakage of the sliding noise of the seal bearing during the rocking. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 Therefore, the present invention is a spherical joint that connects the first pipe body and the second pipe body, and includes an inner flare portion formed at an end portion of the first pipe body and an end portion of the second pipe body. And a first flange having a first outer flare portion corresponding to the axial first half of the inner flare portion, and an axial second half of the inner flare portion facing the first flange. A second flange having a second outer flare portion corresponding to the first and second outer flare portions, and a first flange and a first flange which are respectively interposed between the first and second outer flare portions and the inner flare portion. And 2 means for elastically connecting the first flange and the second flange on the outer peripheral sides of the first outer flare portion and the second outer flare portion, respectively. .

[0007]

[Action]

 Since the inner flare portion is surrounded by the spherical spherical ring-shaped seal bearings supported by the first and second outer flare portions, respectively, the contact surfaces of the inner flare portion and the seal bearing can rotate in the directions of 360 ° with respect to each other. , Make uniform contact with any direction. As a result, the first exhaust pipe and the second exhaust pipe can swing in either direction and have equal flexibility. Further, since the inner flare portion slides on the inner diameter surface of the seal bearing, even if an abnormal noise is generated due to the slip, the inner flare portion is sufficiently damped by the presence of the seal bearing and the outer flare portion on the outer side.

[0008]

【Example】

 FIG. 1 shows an embodiment of the present invention applied to a connecting portion of an exhaust pipe of a vehicle. The first exhaust pipe 1 extending from the exhaust manifold of the engine is provided with an inner flare portion 2 which is spherically bulged at the tip thereof. On the other hand, a first flange 4 is provided at the tip of the second exhaust pipe 3 extending rearward of the vehicle. The first flange 4 is connected to the cylindrical portion 5 that serves as a connecting portion with the second exhaust pipe 3, and is connected to the cylindrical portion 5 so as to correspond to the inner flare portion 2 of the first exhaust pipe 1 and to the outside thereof. It is composed of a widened first outer flare portion 6 and a vertical wall portion 7 extending from the first outer flare portion 6 toward the outside of the exhaust pipe axis by a half diameter. Then, the first outer flare portion 6 covers substantially the latter half of the inner flare portion 2 of the first exhaust pipe 1 as the first half.

On the other hand, a second outer flare corresponding to the inner flare portion 2 and spreading outwardly of the inner flare portion 2 so as to cover substantially the front half portion of the inner flare portion 2 of the first exhaust pipe 1. A second flange 10 having a part 11 is provided and is arranged facing the first flange 4 described above. The second flange 10 further has a vertical wall portion 12 extending from the second outer flare portion 11 toward the outer side of the exhaust pipe axis by a half diameter. In addition, folded-back portions 8 and 13 are formed on the outer peripheral edges of the vertical wall portions 7 and 12 of the first and second flanges 4 and 10 in directions away from each other.

Between the inner flare portion 2 and the first and second outer flare portions 6 and 11, seal bearings 15 and 16 in the shape of a round sphere are inserted. Here, the flange 14 projects inward from the inner peripheral edge of the second outer flare portion 11 of the second flange 10 to support the inner diameter side of the seal bearing 16. Further, the bearing support tube 9 is sandwiched between the cylindrical portion 5 of the first flange 4 and the second exhaust pipe 3 and extends toward the first exhaust pipe 1, whereby the inner diameter side of the seal bearing 15 is supported. are doing.

In this way, in the state where the seal bearings 15 and 16 are sandwiched between the inner flare portion 2 and the first and second outer flare portions 6 and 11 to bring the respective members into contact with each other, A slight gap is left between the vertical wall portion 7 of the flange 4 and the vertical wall portion 12 of the second flange 10. The first flange 4 and the second flange 10 are connected to each other by the C-shaped spring clips 18, which are attached to the vertical wall portions 7 and 12 at appropriate intervals on the circumference, whereby the first exhaust pipe 1 is connected. And the second exhaust pipe 3 are connected to each other.

The present embodiment is configured as described above, and the inner flare portion 2 of the first exhaust pipe is the first outer flare portion 6 of the first flange and the second outer flare portion of the second flange. Since it is held by the spherical ring-shaped seal bearings 15 and 16 supported by 11, the contact surfaces of the inner flare portion 2 and the seal bearings 15 and 16 can rotate in 360 ° directions with each other, and in which direction. Even with a uniform pressing force. Therefore, the first exhaust pipe 1 and the second exhaust pipe 3 to which the first flange 4 is attached have the effect that they can be swung in either direction and have the same flexibility.

Further, since the surface on which the inner flare portion of the first exhaust pipe slides with the seal bearing is the inner diameter surface of the seal bearing, even if abnormal noise occurs due to slippage on this surface. The presence of the seal bearing and the outer flare portion on the outer side of the seal bearing also has the effect of sufficiently reducing the leakage and making the leakage extremely small. Although the first flange and the second flange are connected by the C-shaped spring clip 18 in the embodiment, the invention is not limited to this. For example, a bolt / nut via a spring similar to the conventional example is used. The same effect can be obtained by connecting with.

[0014]

As described above, according to the present invention, in the spherical joint for connecting the first tubular body and the second tubular body, the inner flare portion is provided at the end of the first tubular body and the second tubular body side. A first outer flare portion and a flange having a second outer flare portion, and a spherical annular seal bearing supported by each outer flare portion is interposed between the outer flare portion and the inner flare portion. By doing so, the inner flare portion is held by the seal bearing, so that the first exhaust pipe and the second exhaust pipe are bent in either direction and have equal flexibility. . Also, since the inner flare slides on the inner diameter surface of the seal bearing, even if abnormal noise due to slippage occurs, it is sufficiently damped by the presence of the seal bearing and the outer flare outside the seal bearing, and It has the effect of very small leakage.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st exhaust pipe 2 Inner flare part 3 2nd exhaust pipe 4 1st flange 5 Cylindrical part 6 1st outer flare part 7 Vertical wall parts 8, 13 Folding part 9 Bearing support cylinder 10 2nd flange 11 Second outer flare portion 12 Vertical wall portion 14 Collar 15, 16 Seal bearing 18 C-shaped spring clip 21 First exhaust pipe 22 First flange 23 Second exhaust pipe 24 Second flange 25 Seal bearing 26 Spherical portion 27 Flare Part 29 bolts and nuts 30 springs

Claims (1)

[Scope of utility model registration request] 1. A spherical joint for connecting a first tubular body (1) and a second tubular body (3), comprising an inner flare portion (2) formed at an end portion of the first tubular body. A first flange (4) provided at an end of the second tubular body and having a first outer flare portion (6) corresponding to an axial first half of the inner flare portion; A second flange (10) having a second outer flare portion (11) corresponding to the axial second half of the inner flare portion, the first flange and the second outer flare. The first flare portion which is respectively supported by the inner flare portion and is interposed between the inner flare portion and the inner flare portion.
And a second spherical annular seal bearing (15, 1,
6) and means (18) for elastically connecting the first flange and the second flange to the outer peripheral sides of the first outer flare portion and the second outer flare portion, respectively. Spherical joint.