JPH0828259A - Support device for exhaust pipe for vehicle - Google Patents

Abstract

PURPOSE:To prevent the occurrence of pull-off only by a fixing member without applying any processing on a bracket by a method wherein a fixing member formed in an annular shape and provided at least at a part of an inner peripheral part with engaging pieces protruding in the direction of the central axis of a ring is inserted in the outer periphery of the inner side of the large part of a bracket. CONSTITUTION:A fixing member 10 has a ring part formed of a spring steel and engaging pieces 11 positioned facing each other at a distance of 90 deg. are protruded from the ring part. A support device employs a muffler support member 20 made of rubber and the muffler support member 20 is provided on the under side with a support part 21 on the exhaust pipe side having a through-hole 21a in which a bracket pipe 31 on the exhaust pipe side is pressed for vibration insulation support. The bracket pipe 31 for supporting an exhaust pipe having a spool part 31a with a large outside diameter is pressed in the through-hole 21a for insertion. The spool part 31a is inserted in the fixing member 10 at the outlet part of the through-hole 21a. By hooking the spool part 31a of the bracket pipe 31 at the engaging pieces 11, pull-off of the bracket 31 is prevented from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle exhaust pipe support device, and more particularly to an improvement thereof.

[0002]

2. Description of the Related Art Conventionally, as a supporting device for a vehicle exhaust pipe of this kind, as shown in FIG. 9, for example, a bracket pipe 1 fixed to the exhaust pipe side and a bracket pipe 2 fixed to the vehicle body side are provided with a muffler support rubber. 3 through holes 3a, 3b
The exhaust pipe (not shown) is supported by the vehicle body (not shown) in a vibration-proof manner by being attached to the vehicle body. In order to prevent the bracket pipes 1 and 2 from coming off from the muffler support rubber 3 due to vibration of the vehicle body or the like, the bracket pipes 1 and 2 have through holes 3 for the muffler support rubber at the tips thereof.
Pipe spool part 1 whose outer diameter is larger than the inner diameters of a and 3b
a and 2a are provided and locked to the muffler support rubber 3 at the outlet side of the through holes 3a and 3b.

[0003]

In the case of the above-described vehicle exhaust pipe supporting device, it is necessary to increase the difference between the outer diameter of the pipe spool and the inner diameter of the rubber through hole in order to prevent the bracket pipe from coming off. In addition, it is more effective to make the outer diameter of the bracket pipe larger than the inner diameter of the rubber through hole. However, since it is difficult to remove the bracket pipe, it becomes very difficult to insert the bracket pipe into the muffler support rubber, and there is a problem that workability of insertion and attachment is significantly deteriorated.

On the other hand, for example, Japanese Utility Model Laid-Open No. 62-1941
As disclosed in Japanese Patent Publication No. 24, a groove is provided along the outer periphery of a portion of a bracket pipe protruding from a rubber through hole, and a snap ring is locked in the groove to prevent the bracket pipe from coming off. ing. Further, as shown in Japanese Utility Model Laid-Open No. 3-83317, a large number of small holes are provided in a bracket pipe, and a retaining pin is inserted into the small hole of a protruding portion from a rubber through hole to prevent the bracket pipe from coming off. Those that prevent are known. Furthermore, as shown in Japanese Utility Model Laid-Open No. 5-36017, an indented annular bead is provided on the outer periphery of the insertion portion of the bracket pipe into the rubber through hole, and the bracket pipe is inserted into the rubber through hole. An annular bead that engages with the annular bead is provided on the inside of this insertion portion, and a tubular member having a slit formed along the axial direction and a flange provided on the other end side is inserted and attached. It is also known to prevent slipping out. Further, as other supporting members, a portion protruding from the rubber through hole of the bracket pipe,
It is also known that a bracket pipe is prevented from coming off by penetrating a bolt and locking a washer on the bolt.

However, with respect to each of the supporting members described in the above publications and the like, it is necessary to drastically change the shape of the bracket pipe, and the number of assembling steps is increased, resulting in a significant increase in manufacturing cost. There's a problem. The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle exhaust pipe support device that can reliably prevent the bracket pipe from coming off from the muffler support rubber and that has a simple structure. And

[0006]

In order to achieve the above object, the structural feature of the invention according to claim 1 is that a bracket for connecting one end to a vehicle exhaust pipe and supporting the same is provided. By fitting the end side into the through hole of the rubber-made connecting member attached to the vehicle body, and locking the large-diameter portion on the other end side of the bracket penetrating the connecting member to the end surface of the connecting member. In a vehicle exhaust pipe supporting device for supporting an exhaust pipe on a vehicle body, a fixing member which is inserted into an outer circumference inside a large-diameter portion of a bracket, and is ring-shaped, and at least a part of the inner peripheral portion of the ring has There is provided a fixing member having an engaging piece protruding in the central axis direction.

Further, a structural feature of the invention according to claim 2 is that in the vehicle exhaust pipe supporting device according to claim 1, the engaging piece is bent in the bracket protruding direction. .

Further, the structural feature of the invention according to claim 3 is that, in the vehicle exhaust pipe supporting device according to claim 1, the engaging piece is bent inward in the bracket protruding direction and is directed inward. It is configured by folding back toward the center and bending the folded tip toward the center.

Further, the structural feature of the invention according to claim 4 is that the inner peripheral surface formed by the tip of the engaging piece in the vehicle exhaust pipe supporting device according to claim 1 to claim 3. The diameter is set to be equal to or smaller than the outer diameter of the bracket.

Further, the structural feature of the invention according to claim 5 is that the other end of the bracket for connecting one end to the exhaust pipe for a vehicle and supporting the exhaust pipe is made of a rubber coupling attached to the vehicle body. Of a vehicle exhaust pipe in which the exhaust pipe is supported on the vehicle body by being fitted into the through hole of the member and locking the large-diameter portion on the other end side of the bracket penetrating the connecting member to the end surface of the connecting member. In the supporting device, a fixing member having a ring shape and having an engaging piece protruding in the central axis direction of the ring on at least a part of the inner peripheral portion is embedded around the through hole on the bracket protruding side in the connecting member. It is in.

Further, a structural feature of the invention according to claim 6 is that in the vehicle exhaust pipe supporting device according to claim 5, the engaging piece is bent in the bracket protruding direction. .

Further, in the structural feature of the invention according to claim 7 above, in the vehicle exhaust pipe supporting device according to claim 6, the outer peripheral position of the through hole of the connecting member in which the fixing member is embedded This is because a recess is provided at least in a region corresponding to at least the engaging piece on the surface of the connecting member at the outer peripheral position.

[0013]

In the invention according to claim 1 configured as described above, by inserting the ring-shaped fixing member into the large diameter portion protruding from the through hole of the rubber connecting member of the bracket, The bracket is locked to the engaging piece of the fixing member and is firmly fixed to the rubber connecting member. for that reason,
It is possible to reliably prevent the bracket from coming off the rubber connecting member. According to the invention of claim 1,
The removal effect can be obtained by simply using a simple fixing member without performing any processing on the bracket, and the manufacturing cost is not significantly increased.

Further, in the invention according to claim 2 configured as described above, since the engaging piece is bent toward the protruding direction of the bracket, the fixing member can be easily attached to the bracket. Further, when the bracket is pulled out, the engaging piece is bent inward and displaced in the direction in which the inner diameter becomes smaller, so that the pulling out of the bracket can be more strongly prevented.

Further, in the invention according to claim 3 configured as described above, when the fixing member is fitted to the bracket, the folded-back portion of the engaging piece is pushed outward and displaced, so that the fitting is extremely difficult. Easily done. Further, after the bracket is inserted, the folded back portion is displaced inward with respect to the pulling out of the bracket, so that the bracket is reliably prevented from coming off.

Further, in the invention according to claim 4 configured as described above, since the engagement piece is tightly engaged with the outer periphery of the bracket, the engagement piece and the bracket are brought into contact with each other against the vibration of the vehicle. No unnecessary noise is generated.

Further, in the invention according to claim 5 configured as described above, since the fixing member is embedded around the through hole on the protruding side of the bracket in the connecting member, the bracket is press-fitted into the connecting member. At the same time, since the bracket can be inserted into the fixing member, the workability of inserting the bracket is significantly improved.

Further, in the invention according to claim 6 configured as described above, since the engaging piece is bent in the protruding direction of the bracket, the bracket can be easily press-fitted into the connecting member. In addition to the effect of the invention according to the above, the workability of inserting and mounting the bracket is further improved.

Further, in the invention according to claim 7 configured as described above, since the concave portion is provided, the displacement of the engaging piece to the outside can be easily performed when the bracket is press-fitted, so that the bracket is connected. The attachment to the member is further facilitated.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a fixing member 10 of a vehicle exhaust pipe supporting device according to a first embodiment with a front view and a sectional view. It is shown in the figure. The fixing member 10 is formed by resin molding and has a ring portion 10 of 25 mmφ × 1.5 mm thickness.
Space a with a flower pattern with a maximum outer diameter of 19φ in the center
Is provided. Engaging pieces 11 having a width of 3 mm are provided so as to protrude from each other on the inner periphery of the ring portion 10a so as to be spaced apart from each other by 90 degrees.
m protrusions 12 are provided. A notch 13 having a radius of 1 mm is provided at the boundary between the engaging piece 11 and the protruding portion 12 to form a portion having a maximum outer diameter of 19φ. Engagement piece 1
As shown in FIG. 1B, 1 is bent 90 degrees in a circular arc shape in one direction with respect to the plane of the fixing member 10. The distance d between the inner ends of the facing engaging pieces 11 is formed to be the same as or shorter than the outer diameter p of the vehicle exhaust pipe supporting bracket pipe described later. Although engineering plastics such as POM and PA are used as the resin material of the fixing member 10, spring steel or general steel plate may be used in addition to the resin material.

Next, an exhaust pipe supporting device using the fixing member 10 will be described. As shown in FIG. 2, this support device uses a muffler support member 20 made of rubber, and the muffler support member 20 has an exhaust gas provided with a through hole 21a into which an exhaust pipe side bracket pipe 31 is press fitted. The pipe side support portion 21 is provided, and the vehicle body side support portion 22 having the through hole 22a into which the vehicle body side bracket pipe 32 is press-fitted is provided on the upper side. And muffler support member 2
Reference numeral 0 is for supporting the press-fitted bracket pipes 31, 32 in a vibration-proof manner. The exhaust pipe side support portion 21 and the vehicle body side support portion 22 have the same shape in this embodiment, and the exhaust pipe side will be mainly described below.

In assembling this supporting device, first, an iron exhaust pipe supporting bracket pipe 31 provided with a spool portion 31a having a large outer diameter at its tip is press-fitted into the through hole 21a of the muffler support member 20 and inserted. It is carried out by Then, the fixing member 10 is inserted inside the spool portion 31a of the bracket pipe 31 protruding toward the outlet side of the exhaust pipe side support portion 21, and the engagement piece 11 is locked to the spool portion 31a. As a result, the spool portion 31a of the bracket pipe 31 is caught by the engaging piece 11 of the fixing member 10, and the engaging piece 11 is pushed against the force of pulling out the bracket pipe 31 from the through hole 21a, and the distance between the inner ends thereof is increased. It is displaced in the direction that d becomes smaller, and the bracket pipe 3 becomes more and more.
It becomes difficult to pull out 0. Therefore, the reliability of the support of the bracket pipe 31 in the muffler support member 20 is enhanced. Further, since the distance d between the inner ends of the engagement piece 11 is made equal to or shorter than the outer diameter p of the bracket pipe 30, there is no play between them, so that the engagement piece 11 and the engagement piece 11 are protected against vibration of the vehicle. Noise generation due to contact with the bracket pipe 30 can be effectively prevented. The number of engaging pieces 11 of the fixing member 10 is 4
The number is not limited to three, and may be three as shown in FIG. 3, and the number can be changed as necessary.

Next, as a modification of the first embodiment,
As shown in FIGS. 4A and 4B, the engaging piece 14 of the fixing member 10 is provided in the same plane as the fixing member 10 without bending. Then, the distance d between the inner ends of the engagement pieces 14
Is formed to be the same as or shorter than the outer diameter p of the exhaust pipe supporting bracket pipe 31. By using the fixing member 10 according to the modified example 1 configured as described above, it becomes slightly difficult to insert the bracket pipe 31 of the fixing member 10 as compared with the first embodiment, but For pulling out, it is possible to obtain substantially the same effect as in the first embodiment. The fixing member 10 can be manufactured more easily than the fixing member of the first embodiment.

Next, a modified example 2 of the first embodiment will be described. As shown in FIG. 5, the fixing member 15 according to Modification 2 is provided with a ring portion 16 and engaging pieces 17 at four positions on the inner peripheral portion thereof, and is integrally formed by resin molding. Each engagement piece 17 is separated by a slit 18. The engaging piece 17 is bent at a right angle from the ring portion 16 and has a constant height, and the folded portion 1 is folded inward from the tip of the folded portion.
7b and a protrusion 17c in which the tip of the folded portion 17b is slightly protruded inward. By using the fixing member 15 according to the modified example configured as described above, when the fixing member 15 is fitted inside the spool portion 31a of the bracket pipe 31 after being press-fitted into the muffler support member 20 of the bracket pipe 31, Since the folded-back portion 17b of the engagement piece 17 is pushed outward and displaced, the insertion and attachment can be performed very easily. After the bracket pipe 31 is attached, the bent portions 17a and the folded portions 17b are displaced inward, so that the bracket pipe 31 is reliably prevented from coming off.

Next, a second embodiment will be described with reference to the drawings. FIG. 6 shows a muffler support member 40 applied to this embodiment by a front view and a sectional view. The muffler support member 40 includes the fixing member 10 shown in the first embodiment on the right side of the exhaust pipe side support portion 41 provided with the through hole 41a into which the lower exhaust pipe side bracket pipe 31 is press-fitted. The tip of the engaging piece 11 is embedded toward the surface on the outlet side. For embedding the fixing member 10,
When the muffler support member 40 is molded, it is obtained by setting the fixing member 10 in a molding die and integrally molding.

When the bracket pipe 31 is inserted into the through hole 41a of the exhaust pipe supporting portion 41 constructed as described above, it is not necessary to insert the fixing member 10 into the spool portion 31a separately. Is easy and convenient. In addition, since the engaging piece 11 is bent in the press-fitting direction of the bracket pipe, the bracket pipe 31 can be easily press-fitted, and the workability of inserting the bracket pipe is significantly improved. Further, when the bracket pipe 31 is pulled out, the engagement piece 11 of the fixing member 10 catches the spool portion 31 a of the bracket pipe 31 and pulls the bracket pipe 31 out of the through hole 21. Is pushed and is displaced in a direction in which the distance d between the inner ends becomes smaller, and it becomes more difficult to pull out the bracket pipe 31. Therefore, the reliability of the support of the bracket pipe 31 in the muffler support member 40 is improved.

As a modified example of the second embodiment, as shown in FIG. 7, the surface of the exhaust pipe supporting portion 41 at a position slightly on the outer peripheral side of the outer peripheral position of the through hole 41a in which the fixing member 10 is disposed. The recess 41b is provided in a region corresponding to the engaging piece 11.
As a result, when the bracket pipe 31 is press-fitted into the through hole 41a, the engagement piece 11 is easily displaced outward by the recess 41b, so that the bracket pipe 31 can be more easily inserted and attached.

In each of the above-mentioned embodiments and modifications, the case where the exhaust pipe side and the vehicle body side bracket pipes are press-fitted and fixed to the muffler support member has been described, but as shown in FIG. The muffler support member 51 is applied to support the two bracket pipes 52 on the vehicle body side, and the muffler support member 51 is attached to the exhaust pipe 5 on the exhaust pipe side.
You may make it fix to the muffler support member 51 by the support member 53 attached to 4.

In the above embodiment, the support of the vehicle exhaust pipe is explained, but the present invention can also be applied to a silencer and the like. Further, the muffler support member may be fixed to the vehicle body side by using bolts or the like instead of the bracket pipe. Further, the shape and the like of each portion of the exhaust pipe supporting device shown in each of the above-mentioned embodiments is not limited to the one having the above-mentioned configuration, and can be appropriately changed according to the application or the like.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a fixing member of a vehicle exhaust pipe supporting device according to a first embodiment of the present invention and a cross-sectional view taken along line I-I.

FIG. 2 is a cross-sectional view and a right side view showing a usage state of the vehicle exhaust pipe support device.

FIG. 3 is a front view showing an example in which the number of engaging pieces of a fixing member of the supporting device is changed.

FIG. 4 is a front view and a cross-sectional view taken along line IV-IV schematically showing a first modification of the fixing member of the supporting device.

FIG. 5 is a front view schematically showing a modified example 2 of the fixing member of the support device, a cross-sectional view taken along the line VV, and a partially broken cross-sectional view showing an inserted state.

FIG. 6 is a front view showing a muffler support member of the supporting apparatus according to the second embodiment and a cross-sectional view taken along line VI-VI.

FIG. 7 is a sectional view showing a muffler support member according to a modification of the second embodiment.

FIG. 8 is a perspective view schematically showing an example in which a muffler support member is attached to an exhaust pipe by a support member.

FIG. 9 is a cross-sectional view schematically showing a vehicle exhaust pipe support device according to a conventional example.

[Explanation of symbols]

10 ... Fixing member, 11 ... Engaging piece, 15 ... Fixing member, 16
... ring portion, 17 ... engaging piece, 17a ... folded portion, 1
Reference numeral 7b ... Folded portion, 17c ... Projection portion, 20 ... Muffler support member, 21 ... Exhaust pipe side support portion, 21a ... Through hole, 2
2 ... Vehicle side support part, 22a ... Through hole, 31 ... Exhaust pipe side bracket pipe, 31a ... Spool part, 32 ... Vehicle body side bracket pipe, 32a ... Spool part, 40 ... Muffler support member, 41 ... Exhaust pipe support part, 41a ... through hole, 4
1b ... Recessed part, 51 ... Muffler support member, 52 ... Vehicle side bracket pipe, 53 ... Support member, 54 ... Exhaust pipe.

Claims (7)

[Claims] 1. A vehicle exhaust pipe is joined at one end thereof to a through hole of a rubber connecting member attached to a vehicle body so as to connect the other end of the bracket supporting the exhaust pipe. In a vehicle exhaust pipe support device for supporting the exhaust pipe on a vehicle body by locking a large-diameter portion on the other end side of the penetrating bracket to an end surface of the connecting member, the inside of the large-diameter portion of the bracket An exhaust gas for vehicles, which is a fixing member to be inserted into the outer periphery, and is provided with a ring-shaped fixing member having an engaging piece protruding in the central axis direction of the ring on at least a part of the inner peripheral portion. Tube support device. 2. The vehicle exhaust pipe supporting device according to claim 1, wherein the engaging piece is bent toward the bracket projecting direction. 3. The vehicle exhaust pipe supporting device according to claim 1, wherein the engaging piece is bent toward the protruding direction of the bracket and folded back inward, and the folded tip is centered. A support device for an exhaust pipe for a vehicle, which is configured by being bent. 4. The vehicle exhaust pipe supporting device according to any one of claims 1 to 3, wherein an inner peripheral diameter formed by a tip of the engaging piece is
A supporting device for an exhaust pipe for a vehicle, wherein the outer diameter of the bracket is equal to or smaller than the outer diameter of the bracket. 5. A vehicle exhaust pipe is joined at one end thereof to a through hole of a rubber connecting member attached to a vehicle body by connecting the other end side of the bracket to support the exhaust pipe. A vehicle exhaust pipe support device for supporting the exhaust pipe on a vehicle body by locking a large-diameter portion on the other end side of the penetrating bracket to an end surface of the connecting member, wherein at least a ring-shaped inner peripheral portion is provided. A support device for an exhaust pipe for a vehicle, wherein a fixing member having an engaging piece projecting in a direction of a central axis of the ring is partially embedded around a through hole on a bracket protruding side in the connecting member. 6. The vehicle exhaust pipe supporting device according to claim 5, wherein the engaging piece is bent toward the bracket protruding direction. 7. The vehicle exhaust pipe supporting device according to claim 6, wherein the surface of the connecting member is slightly outside the outer peripheral position of the through hole of the connecting member in which the fixing member is embedded. A support device for an exhaust pipe for a vehicle, characterized in that a recess is provided at least in a region corresponding to the engagement piece.