JP3966140B2 - Cylindrical anti-vibration rubber mounting bracket - Google Patents

Description

BACKGROUND OF THE INVENTION
The present invention relates to a mounting bracket for mounting and fixing a vibration isolating rubber such as an engine mount and a suspension bush of a vehicle, particularly a cylindrical vibration isolating rubber, to a mating member.
[0001]
[Prior art]
Conventionally, a cylindrical anti-vibration rubber having a rigid outer cylinder and an inner cylinder and a rubber elastic body disposed between them is widely used as an anti-vibration rubber for vehicle engine mounts and suspensions. .
As a mounting bracket for mounting and fixing this kind of anti-vibration rubber to the mating member, a fitting holding portion that press-fits the outer cylinder and holds the cylindrical anti-vibration rubber in a fitted state, and a mating member The thing provided with the fixing | fixed part is used.
[0002]
One example thereof is disclosed in Patent Document 1 below.
In this publication, the conventional mounting bracket 200 shown in FIG. 5 presses a base portion 204 having a fixing portion 202 and an outer cylinder 208 of a cylindrical vibration-proof rubber 206 into the vibration-proof rubber. Since the cylindrical fitting holding portion 210 that holds the 206 in a fitted state is separate from the weight and heavy, and the cost is high, a single plate is bent as shown in FIG. The mounting bracket 200 is configured.
[0003]
Specifically, by bending a single plate material to form a base portion 204 having a fixing portion 202 and a pair of plate-like support portions 212, and drawing the plate-like support portion 212. A pair of cylindrical fitting holding portions 214 projecting in the axial direction is formed, and the outer cylinder 208 is press-fitted into the cylindrical fitting holding portions 214, and the fitting holding portions 214 prevent it. The vibration rubber 206 is held in a fitted state.
In these drawings, reference numeral 215 denotes an inner cylinder, and 216 denotes a rubber elastic body disposed between the inner cylinder 215 and the outer cylinder 208.
[0004]
However, in the case of the mounting bracket 200 shown in FIG. 6 configured as described above, there is still a problem that the cost is not sufficiently low.
FIG. 7 shows the shape of a mounting bracket that was tried for trial against the background described above.
The mounting bracket 218 shown in the drawing forms a pair of plate-like support portions 220 by punching one plate material, and each plate-like support portion 220 has a short cylindrical fitting holding portion 222 by burring. Are protruded in opposite directions, that is, opposite to each other, and an outer cylinder of a cylindrical anti-vibration rubber is press-fitted from one direction into the pair of fitting holding portions 222, and the fitting holding portions 222 are inserted. Thus, the anti-vibration rubber is held in a fitted state.
[0005]
In this mounting bracket 218, a plurality of (here, three) metal pipes 224 having the same length are interposed between the pair of support portions 220 and 220, and their axial end surfaces are attached to the support portions 220. They are welded together and assembled as a whole.
[0006]
In this mounting bracket 218, a bolt is inserted into a through hole 226 and a pipe 224 formed in each support portion 220 and screwed into a mating member, for example, an engine, so that the mounting bracket 218 is secured to the mating member. To do.
[0007]
In the case of this mounting bracket 218, as shown in FIG. 4B, the dimension L obtained by adding the plate thickness 2t of the support portion 220 to the axial dimension d of the pipe 224 is the outer diameter of the cylindrical anti-vibration rubber. The dimension is approximately equal to the axial length of the cylinder.
[0008]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 61-248931
[Problems to be solved by the invention]
However, the mounting bracket 218 shown here still has room for improvement in terms of weight reduction and cost reduction. Furthermore, a cylindrical vibration-proof rubber is press-fitted into the fitting holding portion 222. There is a problem in terms of press-fitting properties.
[0010]
Specifically, in FIG. 4B, when the cylindrical vibration-proof rubber (specifically, the outer cylinder) is press-fitted in the right direction in the drawing into the fitting holding portion 222, the fitting holding located on the left side in the drawing. Although it can be relatively easily press-fitted into the portion 222, the anti-vibration rubber is pressed into the fitting holding portion 222 on the right side in the figure from the front end side. If the shaft center of the anti-vibration rubber is deviated, the outer cylinder of the anti-vibration rubber comes into contact with the front end surface of the right fitting holding portion 222 in the figure, and the right fitting holding portion 222 However, there is a problem that the anti-vibration rubber cannot be pressed in well.
[0011]
In view of this, in the mounting bracket 218, a curved surface (R surface) is formed on the inner peripheral side of the front end portion of the fitting holding portion 222 on the right side in the drawing so that the curved surface can be guided during press-fitting. I have to.
However, even if this is done, there is a problem that the press-fitting property cannot be made sufficiently good, and a curved surface must be separately formed on the inner peripheral side of the tip end portion of the fitting holding portion 222 on the right side in the drawing. This causes problems such as high processing costs.
[0012]
In addition, in the case of this mounting bracket 218, since the pair of fitting holding portions 222 face each other, that is, are opposite to each other, the fitting holding portion 222 and the support portion 220 are configured to constitute the mounting bracket 218. Two types of parts are required, and the number of components of the mounting bracket 218 increases, and as a result, the cost of the mounting bracket 218 increases.
[0013]
[Means for Solving the Problems]
The mounting bracket of the cylindrical vibration-proof rubber of the present invention has been devised to solve such problems.
Thus, the first aspect of the present invention is a mounting bracket for mounting and fixing a cylindrical anti-vibration rubber having a rigid outer cylinder and inner cylinder and a rubber elastic body disposed therebetween to a mating member. A pair of opposing plate-like support portions and axially projecting at each support portion, and press-fitting the outer cylinder of the anti-vibration rubber to hold the anti-vibration rubber in a fitted state A pair of cylindrical fitting holding portions and a fixing portion to the mating member, and the pair of fitting holding portions are press-fitted into the outer cylinder of the anti-vibration rubber with respect to each other in the axial direction. The pair of plate-like support portions are integrally connected to each other while maintaining a set interval in the axial direction by welding a pipe inserted between them. It is characterized by being.
[0014]
According to a second aspect of the present invention, the curved or bent surface according to the first aspect, wherein only the root inner peripheral portion of the inner peripheral portion of the cylindrical fitting holding portion shifts to a smaller diameter as the shape advances toward the distal end side in the axial direction. It is characterized by being.
[0015]
According to a third aspect of the present invention, in any one of the first and second aspects, the support portion and the cylindrical fitting holding portion are integrally formed by plastic processing of a plate material.
[0016]
According to a fourth aspect of the present invention, in any one of the first to third aspects, the support portion and the fitting holding portion are integrally formed by burring as the plastic working.
[0017]
[Operation and effect of the invention]
As described above, the mounting bracket for the cylindrical anti-vibration rubber according to the present invention has the pair of cylindrical fitting holding portions that press-fit the anti-vibration rubber and hold it in the fitted state from the pair of plate-like support portions. in the axial direction obtained by protruding into the press in the same direction to each other, the case of the mounting bracket, when press-fitting the vibration isolating rubber mating holder, from the roots to any of the fitting holding section It is possible to press-fit toward the tip side and assemble, and the press-in workability at that time can be improved.
[0018]
In the present invention, the mounting bracket is configured by integrally connecting with each other while maintaining a set interval in the axial direction by welding a pipe having a pair of plate-like support portions interposed therebetween.
In this case, since the pair of fitting holding portions are oriented in the same direction in the axial direction, the pair of parts including the fitting holding portion and the plate-like support portion have the same shape, that is, one type of the pair of parts. This makes it possible to reduce the number of parts for constituting the mounting bracket, thereby further reducing the cost of the mounting bracket.
[0019]
Further, when the mounting bracket is configured according to the present invention, the length of each pipe can be shortened as compared with the mounting bracket as a comparative example shown in FIGS. 7 and 4B, thereby further increasing the weight of the mounting bracket. Reduction can be achieved, and the cost can be further reduced accordingly.
[0020]
Furthermore, when inserting a shaft-like fastener such as a bolt into the pipe and fixing the mounting bracket to the mating member, the length of the fastener can also be shortened, and the cost required for the fastener can be reduced. This can contribute to a reduction in vehicle weight.
[0021]
In this case, the shape of the root inner peripheral portion of the fitting holding portion can be a curved or bent surface that shifts to a smaller diameter as it advances toward the tip end side in the axial direction.
By doing so, when the anti-vibration rubber is press-fitted into the fitting holding portion, the curved or bent surface becomes a guide surface to provide press-fitting guidance, thereby further improving the press-fitting workability. it can.
[0022]
In the present invention, the plate-like support portion and the cylindrical fitting holding portion can be integrally formed by plastic working of a plate material (claim 3 ).
By doing in this way, a fitting holding part can be easily formed in each support part.
[0023]
By burring the fitting support portion in this case it may have been formed integrally with the supporting portion (claim 4).
In this case, the curved surface, that is, the guide surface can be formed at the same time on the inner periphery of the root of the fitting holding portion.
[0024]
【Example】
Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes a vibration-proof rubber, which is a cylindrical metal outer cylinder 12 and a metal inner cylinder 14 which also has a cylindrical shape, and is fixed between them by vulcanization adhesion. And a rubber elastic body 16.
Reference numeral 18 denotes a metal engine side mounting bracket having a pair of plate-like support portions 20 and a cylindrical fitting holding portion 22 formed integrally with each of the support portions 20.
[0025]
Here, each fitting holding part 22 is formed integrally with each supporting part 20 by burring, and is formed in a state protruding in the same direction in the axial direction.
The pair of fitting holding portions 22 are portions for holding the vibration isolating rubber 10, and as shown in FIG. 4 (A), each of the vibration isolating rubber 10 (specifically, the outer cylinder 12) is connected from the left side in the drawing. The anti-vibration rubber 10 is held in a fitted state by the pair of fitting holding portions 22 by being pressed into the fitting holding portion 22 in the right direction.
In (A), the inner diameter a of the left fitting holding portion 22 in the drawing is slightly larger than the inner diameter b of the right fitting holding portion 22 in the drawing.
[0026]
Each support portion 20 is provided with a notch 24 and a plurality (three in this case) of through holes 26 at positions facing each other in the axial direction.
Further, between the pair of support portions 20 and 20, a number of metal pipes 28 corresponding to the through holes 26 (three in this case) are inserted, and the respective axial end surfaces thereof correspond to the respective support portions 20. It is welded and joined to the inner surface.
And by the welding joining, a pair of support part 20 is mutually couple | bonded together in the state holding the setting space | interval in the axial direction.
[0027]
Here, the plurality of through holes 26 and the pipes 28 form a fixing portion for fixing the mounting bracket 18 to the mating member, here, the mounting portion 32 on the engine side shown in FIG. 2, and FIG. As shown, the mounting bracket 18 is fixedly attached to the engine by inserting the bolts 30 through the through holes 26 and the pipes 28 and screwing the bolts 30 into the mounting portions 32 on the engine side.
[0028]
In FIG. 3, reference numeral 38 denotes a body-side mounting bracket having a pair of plate-like arms 40, and the anti-vibration rubber 10 is inserted into the arms 40 with bolts 34 and nuts 36 passing through the inner cylinder 14. It is fixed and attached by.
[0029]
As shown in FIG. 4 (A), the root inner peripheral portions of the pair of fitting holding portions 22 each have a circular arc shape that shifts to a smaller diameter as it proceeds to the right side in the drawing, that is, toward the tip end in the axial direction. A surface (R surface) 42 is provided.
These curved surfaces 42 are formed at the same time when the fitting holding portion 22 is subjected to burring.
These curved surfaces 42 serve as a guide surface when the anti-vibration rubber 10 is press-fitted in the right direction in the drawing, and the press-fit workability of the anti-vibration rubber 10 is improved.
[0030]
As is clear from the comparative example diagram of FIG. 4, in the case of the mounting bracket (mounting bracket according to the prototype) 218 of the comparative example shown in FIG. 7 (FIG. 4B), it is supported by the axial dimension d of the pipe 224. The dimension L including the thickness 2t of the portion 220 substantially matches the axial dimension of the antivibration rubber 10, specifically the outer cylinder 12 thereof.
[0031]
On the other hand, in the case of the mounting bracket 18 of this example shown in FIG. 4A, the axial dimension c of the pipe 28 is equal to the plate thickness 2t of the support portion 20, and the protrusion height of the fitting holding portion 22 on the right side in the drawing. The dimension to which e is added is a dimension L that is substantially equal to the axial length of the outer cylinder 12 in the anti-vibration rubber 10.
That is, in the case of the mounting bracket 18 of this example, the dimension of the pipe 28 can be shortened by the protrusion height e of the fitting holding portion 22 on the right side in the drawing.
[0032]
Incidentally, in the case of the mounting bracket 218 of the comparative example of FIG. 4B, the pipe 224 needs to have a length of about 34.8 mm, but in the case of the mounting bracket 18 of this example of FIG. A short one having a length of 23.8 mm can be used.
[0033]
As a result, the weight of the mounting bracket 18 is reduced as much as the length of the pipe 28 is shortened, and the cost required for the mounting bracket 18 is reduced accordingly.
Further, since the pipe 28 is shortened, the length of the bolt 30 shown in FIG. 1 is short, which contributes to weight reduction and cost reduction of the vehicle.
[0034]
In the case of the mounting bracket 18 of this example, since the pair of fitting holding portions 22 face the same direction in the axial direction, the press-fit workability is improved when the vibration-proof rubber 10 is press-fitted and assembled.
In addition, like the mounting bracket 218 of the comparative example, it is necessary to process and form a curved surface that serves as a guide when the anti-vibration rubber 10 is press-fitted on the inner peripheral side of the front end of the fitting holding portion 22 on the right side in the drawing. In addition, the processing for that purpose can be omitted.
[0035]
In the case of the mounting bracket 218 shown in FIG. 4B, since the pair of fitting holding portions 222 face each other, that is, are opposite to each other, a component composed of the fitting holding portion 222 and the support portion 220. However, in the case of the mounting bracket 18 of this example shown in FIG. 4 (A), each of the pair of fitting holding portions 22 has the same direction. Since it is suitable, only one type of necessary component is required, and this also reduces the cost of the mounting bracket 18.
[0036]
Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, in the above example, the shape of the inner periphery of the root of the fitting holding portion is a curved shape, but this may be a bent shape as shown in the lower enlarged view of FIG. .
In addition, the present invention can be applied as a mounting bracket for vibration-proof rubber with a half-split outer cylinder, and in the above example, two plate-like support portions are connected to each other by a pipe. However, the present invention can be applied to a mounting bracket formed by bending a single plate material to form a pair of plate-like support portions. For example, the present invention is variously modified without departing from the gist of the present invention. It can be configured in a form to which is added.
[Brief description of the drawings]
FIG. 1 is a view showing a mounting bracket according to an embodiment of the present invention in a state before press-fitting with a vibration isolating rubber.
FIG. 2 is a view showing a state in which the mounting bracket of the same embodiment is fixed to a mounting portion on the engine side.
3 is a view showing a structure for mounting the vibration-proof rubber of FIG. 1 on the body side.
FIG. 4 is a comparative example diagram showing advantages of the embodiment in comparison with a comparative example.
FIG. 5 is a view showing an example of a conventional mounting bracket.
6 is a view showing an example of a conventional mounting bracket different from FIG.
FIG. 7 is a diagram showing the shape of a mounting bracket as a prototype for development.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Anti-vibration rubber | gum 12 Outer cylinder 14 Inner cylinder 16 Rubber elastic body 18 Mounting bracket 20 Support part 22 Fitting holding part 26 Through hole 28 Pipe 32 Mounting part 42 Curved surface

Claims (4)

A mounting bracket for mounting and fixing a cylindrical anti-vibration rubber having a rigid outer cylinder and an inner cylinder and a rubber elastic body disposed therebetween, to a mating member,
A pair of plate-like support portions opposed to each other and a pair provided in a state protruding in the axial direction at each support portion, and press-fitting the outer cylinder of the vibration-proof rubber to hold the vibration-proof rubber in a fitted state And the pair of fitting and holding portions are connected to each other in the axial direction in the press-fitting direction of the outer cylinder of the anti-vibration rubber. Projecting in the same direction, the pair of plate-like support portions are integrally coupled to each other in a state where a set interval is maintained in the axial direction by welding of a pipe inserted between them. mounting bracket of the cylindrical rubber vibration isolator, characterized in that. 2. The curved inner surface of the cylindrical fitting and holding portion according to claim 1, wherein only the inner periphery of the root is a curved or bent surface that transitions to a smaller diameter as it advances toward the distal end in the axial direction. Mounting bracket for cylindrical anti-vibration rubber. 3. The mounting bracket for a cylindrical anti-vibration rubber according to claim 1 , wherein the supporting portion and the cylindrical fitting holding portion are integrally formed by plastic working of a plate material. The mounting bracket for a cylindrical vibration-proof rubber according to any one of claims 1 to 3 , wherein the support portion and the fitting holding portion are integrally formed by burring as the plastic working.

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