JP3579445B2 - Muffler support device and method of manufacturing the same - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a muffler support device for supporting a muffler on a vehicle body and a method of manufacturing the same.
[0002]
[Prior art]
Conventionally, as this type of muffler support device, a muffler hanger made of only rubber, which is an elastic material, has been widely used. However, when the muffler hung greatly in the horizontal direction due to the force received during sudden start, sudden stop, and sudden turn of the vehicle and the vibration of the engine having a large amplitude, the muffler hanger greatly elastically deformed in the horizontal direction and the muffler hit the vehicle body. There was a problem of damage. Therefore, in the muffler support device disclosed in Japanese Utility Model Laid-Open Publication No. Sho 60-170221, as shown in FIG. 6, a stopper member b is put on the outside of a muffler hanger a, and both are fastened to a vehicle body d with bolts c. It has been proposed to provide a warped portion e at the lower portion of the member b to restrict excessive elastic deformation in the horizontal direction. Here, f is a muffler, and g is a support member on the muffler side.
[0003]
[Problems to be solved by the invention]
However, in the case of the muffler support device disclosed in the above publication (Japanese Utility Model Application Laid-Open No. Sho 60-170221), it is necessary to form the warp portion e in the stopper member b and to form the stopper member b in a complicated shape corresponding to the outer shape of the muffler hanger a. This increases production costs. Further, since the stopper member b is attached to the vehicle body with the stopper member b being put on the outside of the muffler hanger a, there is a problem that a space corresponding to the stopper member b is required and it takes time to mount the stopper member on the vehicle body.
[0004]
The present invention has been made in view of such a point, and an object of the present invention is to provide a stopper member functioning as a core material in a muffler hanger to reduce manufacturing costs, downsize the apparatus, and facilitate installation. And
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a solution taken by the invention according to claim 1 includes, as a muffler support device, an elastically deformable muffler hanger for supporting the muffler on a support base, a plate-like stopper member having rigidity, The muffler hanger is formed between the upper insertion hole through which the support member on the support base side is inserted, the lower insertion hole through which the support member on the muffler side is inserted, and the upper and lower insertion holes. A hole that promotes elastic deformation, and a lower protruding portion that protrudes into the hole from the lower insertion hole, wherein the stopper member is a portion above the hole and the upper insertion portion. The upper surface portion of the muffler hanger including the hole is fixed to the upper portion thereof, and a gap is formed at a predetermined interval between the lower protruding portion and the lower end portion. Set to face And Configurations.
[0006]
According to a second aspect of the present invention, in the muffler support device according to the first aspect, the stopper member is embedded in the muffler hanger when the muffler hanger is molded.
[0007]
According to a third aspect of the present invention, there is provided the muffler support device according to the first aspect, wherein the muffler hanger extends vertically from the lower protruding portion to an upper portion of the muffler hanger and has a groove opening at an upper surface thereof. And the stopper member is inserted into the groove.
[0008]
According to a fourth aspect of the present invention, in the muffler support device according to the second aspect, the muffler hanger is molded so that the gap is formed.
[0009]
According to a fifth aspect of the present invention, there is provided the muffler support device according to the fourth aspect, wherein the muffler hanger is made of rubber, and the gap is formed by shrinkage of rubber generated when the muffler hanger is molded.
[0010]
According to a sixth aspect of the present invention, in the muffler support device according to the third aspect, the groove portion of the muffler hanger is provided to have a size in which the gap is formed.
[0011]
According to a seventh aspect of the present invention, there is provided a method of manufacturing the muffler support device according to the first aspect, wherein a plate-shaped stopper member is disposed in a molding die in advance, and the elastic member is provided in the molding die. The muffler hanger is formed by injecting and filling the material, and a stopper member is embedded in the muffler hanger.
[0012]
According to an eighth aspect of the present invention, there is provided a method of manufacturing a muffler supporting device according to the seventh aspect, wherein rubber is used as an elastic material, and a predetermined gap is formed between the stopper member and the rubber due to shrinkage of the rubber during molding. Is formed.
[0013]
[Action]
With the above configuration, in the invention according to each claim, since the stopper member having rigidity is provided in the muffler hanger, even if the stopper member has a complicated shape corresponding to the outer shape of the muffler hanger or does not have a warp portion, Elastic deformation in the horizontal direction is restricted. Further, since the plate surface of the stopper member is oriented in the horizontal direction, the stopper member does not hinder the vertical deformation of the muffler hanger even if it is provided in the muffler hanger.
[0014]
In particular, in the inventions according to Claims 2 and 7, since the stopper member is embedded in the muffler hanger when the muffler hanger is molded, the mounting of the stopper member is simplified.
[0015]
According to the fourth, sixth and eighth aspects of the present invention, since a gap at a predetermined interval is formed between the muffler hanger and the stopper member, free elastic deformation of the muffler hanger in the vertical direction is ensured. On the other hand, when a large vertical vibration acts, the muffler hanger abuts against the lower end of the stopper member, and the deformation thereof is excessively restricted, and when the muffler hanger is compressed, the muffler hanger abuts against the plate surface of the stopper member. Vibration energy is attenuated due to frictional resistance.
[0016]
Moreover, in the invention according to claims 5 and 8, when the muffler hanger and the stopper member are integrally molded, the gap is formed by utilizing the contraction of rubber, which is a raw material of the muffler hanger, so that the gap can be easily formed. It is.
[0017]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 shows a muffler support device M according to a first embodiment of the present invention. The muffler support device M supports the muffler 1 on a vehicle body 3 as a support base, and includes a muffler hanger 5A. The muffler hanger 5A has an upper insertion hole 7 and a lower insertion hole 9. The support member 7 on the vehicle body side is inserted into the upper insertion hole 7, and the support member 9 on the muffler side is inserted into the lower insertion hole 9 in a retaining shape.
[0019]
The muffler hanger 5A is a molded product made of natural rubber or synthetic rubber, and is elastically deformed by vertical and horizontal vibrations applied from the muffler 1 to attenuate vibrations in each direction.
[0020]
FIG. 2 is a view of the muffler support device M as viewed from the front, in which the left half is an outline view and the right half is a central longitudinal sectional view. FIG. 3 is a drawing of the muffler supporting device M viewed from the side, in which the left half is a cross-sectional view taken along the line AA in FIG. 2 and the right half is an outline drawing. In these figures, a hole 15 for promoting vertical elastic deformation is formed at the center of the muffler hanger 5A, and an upper protruding portion 17A and a lower protruding portion 19A protruding into the hole 15 are formed. The thickness of the projections 17A and 19A is set to be the same as the thickness of the muffler hanger 5A (length in the left-right direction in FIG. 3).
[0021]
A stopper member 21A is embedded in the muffler hanger 5A by integral molding. The stopper member 21A is disposed substantially at the center when viewed from the front, and is disposed substantially at the center in the left-right direction (horizontal direction) of FIG. 3, and the plate surface is directed horizontally. The stopper member 21A is a metal rectangular flat plate, the upper end of which is buried up to the upper side of the upper insertion hole 7 of the muffler hanger 5A, and the exposed portion 25 which is exposed to the outside in the hole 15. And a lower buried portion 27 buried in the lower protruding portion 19A.
[0022]
In the upper buried portion 23, a through hole 29 through which the support member 7 on the vehicle body side is inserted is provided concentrically with the upper insertion hole 7 of the muffler hanger 5A. The upper embedded portion 23 is bonded to the muffler hanger 5A with an adhesive, whereby the stopper member 21A is immovably held by the muffler hanger 5A. On the other hand, the lower buried portion 27 is not adhered to the muffler hanger 5A, thereby ensuring elastic deformation of the muffler hanger 5A. A gap S at a predetermined interval is formed between the lower embedded portion 27 and the muffler hanger 5A by utilizing rubber shrinkage generated during molding of the muffler hanger 5A. The gap S1 between the lower end of the stopper member 21A and the muffler hanger 5A is larger than the gap at no load due to the weight of the muffler 1. The gap S2 in the horizontal direction is set to an interval at which the muffler hanger 5A comes into contact with the stopper member 21A to generate frictional resistance when the muffler hanger 5A is compressed by a vertical excitation force exceeding a predetermined size.
[0023]
Next, a method of manufacturing the muffler support device M will be described. First, an adhesive is applied to a portion of the stopper member 21A that will become the upper embedded portion 23, and the stopper member 21A is disposed in a mold as a molding die. deep. Next, the heated rubber is injected and filled in the mold, and the molded product is taken out after cooling. The upper embedded portion 23 to which the adhesive has been applied is vulcanized and bonded to the muffler hanger 5A, while the lower embedded portion 27 to which the adhesive has not been applied has a gap S between itself and the muffler hanger 5A due to the rubber shrinkage generated in the muffler hanger 5A. Is formed. This rubber shrinkage occurs because the shrinkage rate of the rubber during cooling is greater than that of the metal (stopper member 21A). The portion of the muffler hanger 5A located before and after the upper buried portion 23 also tries to contract, but the gap S does not occur because it is bonded to the stopper member 21A.
[0024]
Next, the operation and effect of the muffler support device M will be described. The plate surface of the stopper member 21A is oriented in the horizontal direction, and is elastically deformed and damped by vertical vibrations. The deformation of the muffler hanger 5A is restricted against a large horizontal swing received from the muffler 1 due to a sudden stop, a sharp turn, or a large amplitude engine vibration. Therefore, by simply embedding the stopper member 21A having a simple shape (rectangular shape) and having no warp portion in the muffler hanger 5A, it is possible to regulate the horizontal displacement without obstructing the elastic deformation in the vertical direction and reduce the manufacturing cost. On the other hand, the distributing device in which the stopper member 21A is housed in the muffler hanger 5A can be downsized, and the attachment to the vehicle body 3 can be facilitated by the fact that both are integrated.
[0025]
Further, since the gap S at a predetermined interval is formed between the muffler hanger 5A and the stopper member 21A, free elastic deformation of the muffler hanger 5A in the vertical direction is ensured. On the other hand, when a large amplitude vertical vibration acts on the muffler hanger 5A, the muffler hanger 5A comes into contact with the lower end of the stopper member 21A, so that excessive deformation thereof can be restricted and the muffler hanger 5A is compressed. Abuts against the plate surface of the stopper member 21A, vibration energy can be attenuated by frictional resistance generated between the two.
[0026]
Moreover, since the stopper member 21A is embedded in the muffler hanger 5A at the same time as the muffler hanger 5A is molded, the mounting of the stopper member 21A is simplified, and the manufacturing cost can be further reduced.
[0027]
Further, since the gap S is formed using the rubber shrinkage of the muffler hanger 5A without applying an adhesive, the formation of the gap S can be facilitated.
[0028]
4 and 5 show a muffler support device N according to a second embodiment of the present invention. FIG. 4 is a view of the muffler support device N as viewed from the front, in which the left half is an external view and the right half is a central longitudinal sectional view. FIG. 5 is a view of the muffler support device N viewed from the side, in which the left half is a cross-sectional view taken along the line BB of FIG. 4 and the right half is an outline view.
[0029]
4 and 5, the muffler hanger 1B of the muffler support device N has an upper protruding portion 17B and a lower protruding portion 19B protruding into the hole 15 with substantially the same protruding length, and also has a left-right direction (horizontal direction) in FIG. Has a groove 31 substantially at the center. The groove portion 31 is opened on the upper surface of the muffler hanger 5B, extends downward, and reaches the central portions 33, 33 located on both left and right sides of the hole 15 and the lower protruding portion 19B.
[0030]
Further, the muffler support device N includes a stopper member 21B. The stopper member 21B is a stamped product of a plate material, and includes two front and rear holding portions 35, 35 held on the upper surface of the muffler hanger 5B, and an insertion portion 37 inserted into the groove 31 of the muffler hanger 5B. I have. Each of the holding portions 35 has a mounting portion 39 mounted on the upper surface of the muffler hanger 5B, and a hanging portion 41 provided at an end of the mounting portion 39. The muffler hanger 5B is sandwiched. The insertion portion 37 is bent in a U-shape, and both ends of the insertion portion 37 are respectively connected to the front and rear holding portions 35. The left and right side surfaces of the insertion portion 37 are formed in the same shape as the side surface shape of the muffler hanger 5B. The insertion portion 37 has a through hole 29 through which the support member 7 on the vehicle body side is inserted, and is formed concentrically with the upper insertion hole 7.
[0031]
The groove 31 is provided in such a size that a gap T with a predetermined interval is formed between the groove 31 and the insertion portion 37 of the stopper member 21B. The gap T1 between the lower end of the stopper member 21B and the muffler hanger 5B is larger than the gap at no load due to the weight of the muffler 1. The gap T2 in the horizontal direction of the insertion portion 37 is set to an interval at which the muffler hanger 5B comes into contact with the stopper member 21B to generate frictional resistance when the muffler hanger 5B is compressed by a vertical exciting force exceeding a predetermined size. ing. Note that the stopper member 21B may be set to the same lateral width as that of the projecting portion of the muffler hanger 5B in FIG. 4 so that the stopper member 21B is not inserted into the central portions 33, 33 of the muffler hanger 5B. Other configurations are the same as those of the first embodiment.
[0032]
In order to manufacture the muffler support device N, the muffler hanger 5B is molded and the stopper member 21B is separately manufactured, and both are assembled.
[0033]
According to the above-described embodiment, the insertion portion 37 can restrict the horizontal vibration of the muffler hanger 5B while allowing the vertical vibration of the muffler hanger 5B. By providing the stopper member 21B integrally in the muffler hanger 5B, it is possible to reduce the size of the device and to facilitate the mounting, and to provide the gap T between the insertion portion 37 and the muffler hanger 5B to perform the first embodiment. Similarly to the example, while ensuring free vertical elastic deformation of the muffler hanger 5B, the stopper member 21B restricts excessive elastic deformation of the muffler hanger 5B against large vertical vibrations, and the vertical direction due to frictional resistance. Vibration energy can be reduced.
[0034]
【The invention's effect】
As described above, according to the muffler support device and the method for manufacturing the same according to the above-described claims, since the stopper member having rigidity is provided in the muffler hanger so that its plate surface faces in the horizontal direction, warpage is caused. Without the need for a part, the elastic deformation in the horizontal direction can be regulated and the manufacturing cost can be reduced. On the other hand, the stopper member can be housed in the muffler hanger to reduce the size, and it can be attached to the vehicle body because both are integrated. Becomes easier.
[0035]
In particular, according to the second and seventh aspects of the present invention, since the stopper member is embedded in the muffler hanger simultaneously with the molding of the muffler hanger, the mounting of the stopper member is simplified, and the manufacturing cost can be further reduced.
[0036]
According to the fourth, sixth, and eighth aspects of the present invention, since a gap at a predetermined interval is formed between the muffler hanger and the stopper member, it is possible to ensure free elastic deformation of the muffler hanger vertically. With respect to large vertical vibrations, excessive elastic deformation of the muffler hanger can be restricted by the lower end of the stopper member, and vertical vibration energy can be reduced by frictional resistance.
[0037]
According to the fifth and eighth aspects of the present invention, when the muffler hanger and the stopper member are integrally formed, the gap is formed by utilizing the contraction of rubber, which is a raw material of the muffler hanger, thereby facilitating the formation of the gap. be able to.
[Brief description of the drawings]
FIG. 1 is an assembled view of a muffler support device according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional front view of the muffler support device.
FIG. 3 is a partial cross-sectional side view of the muffler support device.
FIG. 4 is a partial sectional front view of a muffler support device according to a second embodiment of the present invention.
FIG. 5 is a partial cross-sectional side view of the muffler support device.
FIG. 6 is an assembly diagram of a conventional muffler support device.
[Explanation of symbols]
1 Muffler 15 holes 19A, 19B Lower protruding part 3 Body (supporting base)
5A, 5B Muffler hanger 7 Upper insertion hole 9 Lower insertion holes 21A, 21B Stopper member 31 Groove S, T Clearance

Claims (8)

An elastically deformable muffler hanger that supports the muffler on the supporting base,
A rigid plate-shaped stopper member,
The muffler hanger is formed between an upper insertion hole through which the support member on the support base side is inserted, a lower insertion hole through which the support member on the muffler side is inserted, and an elastic hole formed between the upper and lower insertion holes. A hole that promotes deformation, and a lower protruding portion that protrudes into the hole from the lower insertion hole,
The stopper member has an upper end portion fixed to an upper portion of the muffler hanger which is a portion above the hole and including the upper insertion hole, and has a predetermined distance between the lower protruding portion and the lower end portion. The muffler support device is provided in the muffler hanger such that the plate surface faces in the horizontal direction in a state where the gap is formed . The muffler support device according to claim 1, wherein the stopper member is embedded in the muffler hanger when the muffler hanger is molded. 2. The muffler support device according to claim 1, wherein the muffler hanger has a groove extending vertically from the lower protruding portion to an upper portion of the muffler hanger and opening on an upper surface thereof, and the stopper member is inserted into the groove. . 3. The muffler support device according to claim 2, wherein the muffler hanger is molded so that the gap is formed. 5. The muffler support device according to claim 4, wherein the muffler hanger is made of rubber, and the gap is formed by shrinkage of the rubber generated during molding of the muffler hanger. The muffler support device according to claim 3, wherein the groove of the muffler hanger is provided in such a size that the gap is formed. A method for manufacturing the muffler support device according to claim 1,
A muffler support, wherein a muffler hanger is molded and a stopper member is embedded in the muffler hanger by previously disposing a plate-shaped stopper member in a molding die and injecting and filling an elastic material into the molding die. Device manufacturing method. 8. The method for manufacturing a muffler support device according to claim 7, wherein a rubber is used as the elastic material, and a predetermined gap is formed between the elastic member and the stopper member by contraction of the rubber during molding.

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