JPH09242800A - Structure of insulator bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator bracket for an engine mount which can be molded by securing rigidity and strength by bending and welding of a metallic plate. SOLUTION: An insulator bracket for an engine mount is provided with a cylindrical part 2, two vertical flanges 3 fixed to the outside of the cylindrical part 2, an upper stage installing part 7 extended between both vertical flanges 3 in its vertical directional intermediate position and a lower stage installing part 4 continued with the lower ends of the vertical flanges 3, and the lower stage installing part 4 is extended over a position close to the cylindrical part 2 between the both vertical flanges 3, and a box-shaped space 6 surrounded by mutually opposing surfaces 3 of the two vertical flanges 3, an under surface 7A of the upper stage installing part 7 and upward surfaces 4A of the lower stage installing part 4b between both vertical flanges 3, is formed on the upper side of the lower stage installing part 4, and an insulator bracket 1 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an insulator bracket for a mount insulator that elastically supports an automobile engine or the like with respect to a vehicle body or the like.

[0002]

2. Description of the Related Art As for the structure of an insulator bracket of this type, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 2-8620. That is, this insulator bracket is connected to the cylindrical portion into which the cylindrical insulator is press-fitted, two vertical flanges that are integrally fixed outward at both axial ends of the cylindrical portion, and the lower ends of the two vertical flanges. And a lower-stage mounting portion extending in a direction away from the other vertical flange, and an upper-stage mounting portion integrally fixed above the lower-stage mounting portion and between the outer surface of the cylindrical portion and the both vertical flanges. have. Here, the wall thickness of the lower mounting portion is extremely large compared to the wall thickness of both vertical flanges, so that the mounting strength of the lower mounting portion with respect to the vertical flange is sufficiently secured. The upper mounting portion has a wall thickness intermediate between the vertical flange and the lower mounting portion. The inner cylindrical portion of the cylindrical insulator is supported on the vehicle body side, and the upper and lower mounting portions are supported on the engine side to elastically support the engine on the vehicle body.

[0003]

However, since the structure of the conventional insulator bracket is a cast product of an aluminum alloy, the wall thickness of each place can be changed as described above, but such a cast product is costly. There is a problem that you cannot adjust to the reduction of.

On the other hand, if an insulator bracket having the above-mentioned structure is manufactured as a prototype by bending and welding a metal tube and a metal plate in order to reduce costs, an insulator bracket having a form as shown in FIGS. 17 to 19 is obtained. here,
A is a cylindrical portion, B is a vertical flange, C is a lower mounting portion, and D is an upper mounting portion. The vertical flange B and the lower mounting portion C are integrally formed by bending. Also, the metal bracket and the metal plate, which are independent of each other, are fixed to each other by welding to form an insulator bracket.

However, in the structure of this insulator bracket, since the lower mounting portion C is only bent outward from the lower end of the vertical flange B, the welding margin between the lower mounting portion C and the cylindrical portion A is sufficient. Cannot be ensured, and both lower-stage mounting portions C are only connected to each other through the cylindrical portion A. Therefore, the rigidity between both lower-stage mounting portions C and between these and the cylindrical portion A and There was a problem that the strength was insufficient.

Therefore, the present invention has been made by paying attention to the problems of the above-mentioned prior art and prototypes, and its purpose is to achieve sufficient rigidity by bending and welding a metal plate for cost reduction. The purpose of the invention is to obtain a structure of an insulator bracket which can secure the strength and to further reduce the cost, and to obtain a structure of the insulator bracket which is easy to manufacture.

[0007]

According to a first aspect of the present invention, there is provided a cylindrical portion for covering an outer periphery of a cylindrical insulator, the cylindrical portion being separated from each other in an axial direction of the cylindrical portion and having an upper end portion of the cylindrical portion as a base end. Two vertical flanges that are fixed to the outside of the cylindrical part with the lower end of the two ends being the end, an upper stage mounting part that is bridged between the vertical middle parts of the two vertical flanges, and the lower ends of the two vertical flanges. In an insulator bracket having a lower-stage mounting portion that is continuous with and extends in a direction away from each other on one and the other vertical flanges, by bridging the lower-stage mounting portion to a position close to the cylindrical portion between both vertical flanges. , On the upper side of the lower mounting portion, the surfaces of the two vertical flanges facing each other, the downward surface of the upper mounting portion, and the upper surface of the lower mounting portion between the vertical flanges. Ri enclosed is obtained by forming a box-like space.

Since the box-shaped structure having a box-shaped cross-section is formed by the two mounting portions in the upper and lower steps and the vertical flanges on both sides, the box-shaped space is formed inside the box-shaped structure. It Since the box-shaped structure is formed in the upper and lower mounting portions, both flanges, and the cylindrical portion, the rigidity and strength between the lower mounting portion, the lower portion of the cylindrical portion, and the lower portions of both vertical flanges are improved. .

According to a second aspect of the present invention, in the structure of the insulator bracket according to the first aspect, the two vertical flanges are each formed in a flat plate shape, and at least one of these vertical flanges is formed on a surface orthogonal to the axial direction of the cylindrical portion. By inclining with respect to each other, the distance between the two vertical flanges at the position of the lower mounting portion is increased as the distance from the base end of the vertical flange increases.

For the purpose of inserting another mating bracket for supporting the mount insulator on the support (for example, vehicle body) side or the supported body (for example, engine) side between the vertical flanges, the vertical flanges have a certain distance. It is necessary to expand the vertical flanges, but since the vertical flanges are inclined as described above, even if the axial dimension of the cylindrical part is small, it is possible to expand the vertical flanges without bending the vertical flanges. it can.

According to a third aspect of the present invention, in the structure of the insulator bracket according to the first aspect, the both vertical flanges are provided between the lower mounting portion and the upper mounting portion on the side farther than the cylindrical portion and on the lower mounting portion. Bending in a direction away from each other on the near side expands the space between the vertical flanges.

Most of the part of the mating bracket which is inserted between the vertical flanges is formed thin at the upper part and thicker at the lower part. In this case, a space for the part of the mating bracket to be inserted. Is secured between both vertical flanges, and at the same time, both vertical flanges are brought closer to the joint between the upper stage mounting part and the mating bracket to secure the rigidity of the lower side part of the both vertical flanges and the upper stage mounting part. Is improving.

According to a fourth aspect of the present invention, in the structure of the insulator bracket according to the third aspect, the upper mounting portion and the portion of the vertical flange below the upper mounting portion are formed by bending a single metal plate, and the vertical portion is formed on the vertical mounting portion. The upper portion of the flange above the upper mounting portion is fixed. Therefore, in this case, the vertical flange is such that the upper portion and the lower portion are separate bodies, and these are fixed together to form a vertical flange. Therefore, if the portions of the two vertical flanges above the upper mounting portion are formed of, for example, continuous metal plates at the upper ends, this can be configured by a single metal plate, so that the two vertical flanges and the upper mounting portion can be mounted. The part and the part are composed of two metal plates in total.

[0014]

1 to 5 show an insulator bracket structure of a first embodiment of the present invention,
In this insulator bracket 1, a cylindrical insulator (not shown) is press-fitted into a cylindrical portion described later. As is commonly used, this cylindrical insulator has an inner cylinder, an outer cylinder, and a rubber-like material as an elastic body that is vulcanized and bonded between the inner cylinder and the outer cylinder. The inner cylinder is supported by a bracket on the vehicle body side, and the below-mentioned upper and lower mounting portions of the insulator bracket 1 are supported by the bracket on the engine side to form an engine mount insulator for supporting the engine on the vehicle body.

Therefore, this insulator bracket 1
The cylindrical portion 2 into which the cylindrical insulator is press-fitted is formed by cutting a metal pipe into a predetermined length, and the outer portion of the cylindrical portion 2 is covered with a portion close to half the circumference of the cylindrical portion 2. The two vertical flanges 3 are welded. The vertical flanges 3 are made of a metal plate and are arranged parallel to each other while being separated from each other in the axial direction of the insulator bracket 1, and the lower stage mounting portions 4 are welded to the lower ends of both vertical flanges 3 and the lower outside of the insulator bracket 1.

The lower mounting portion 4 is made of a metal plate having an outer portion 4a extending outward from each lower end of both vertical flanges 3 and an inner portion 4b extending between both vertical flanges 3. In other words, between both vertical flanges 3, a notch 5 is formed by notching in a concave shape on the side away from the cylindrical portion 2. A through hole 4c is formed in each of the outer side portions 4a for penetrating the bolt. Further, the lower stage mounting portion 4 is largely extended to the lower side of the cylindrical portion 2, and the lower portion of the cylindrical portion 2 is formed in a tongue shape. It is welded to the bottom surface.

An upper stage mounting portion 7 is disposed between the vertical flanges 3 above the lower stage mounting portion 4, and the upper stage mounting portion 7 is also made of a metal plate and is welded to the both vertical flanges 3 and the cylindrical portion 2. There is. Further, a through hole 7a for penetrating the bolt is also formed in the upper mounting portion 7, and a lower surface of the upper mounting portion 7 is provided with a counterbore around the through hole 7a. Of the engine side bracket 8 shown in FIG. 3, the upper end of the upper protruding portion 8a inserted between the vertical flanges 3 is seated.

Thus, the inner portion 4b of the lower mounting portion 4, the vertical flanges 3 on both sides thereof, and the upper mounting portion 7 constitute a box-shaped structure 6a having a box-shaped cross section, and this box-shaped structure 6a. A box-shaped space 6 is formed inside. This box-shaped structure 6a
And the box-shaped space 6 is shown in a perspective view, in particular in FIG.
In the figure, reference numeral 7A is the lower surface of the upper mounting portion 7, reference numeral 4A.
Is the upper surface of the inner side portion 4b of the lower mounting portion 4, and reference numeral 3A is the inner surface of the vertical flange 3.

As shown in FIG. 6, the engine side bracket 8 has upper and lower surfaces 8b formed on the left and right shoulders, respectively, and an upper protruding portion 8a directed upward between the upper and lower surfaces 8b. Is protruding. Such an upward surface 8b
Is in contact with the outer portion 4a of the lower mounting portion 4 of the insulator bracket 1 from below and is joined by a bolt, and the upper surface of the upper projection 8a is in contact with the upper mounting portion 7 of the insulator bracket 1 from below and is joined by a bolt. . Reference numeral 8c denotes a bolt hole, which corresponds to the through holes 4c and 7a formed in the lower mounting portion 4 and the upper mounting portion 7 of the insulator bracket 1 and is inserted into the corresponding holes. The engine side bracket 8 is fixed to the insulator bracket 1 by tightening a nut (not shown) on the bolt not shown.

The engine side bracket 8 is also provided with a bolt hole 8d for fixing the bracket to the engine, and a seat surface for seating on the engine is formed around the bolt hole 8d.

Thus, the insulator bracket 1 is fixed to the engine side bracket 8 at the lower stage mounting portion 4 and the upper stage mounting portion 7, and the engine side bracket 8 is fixed to the horizontally installed engine 9 as shown in FIG. .
The engine 9 constitutes a power plant for an FF vehicle in which an engine body, a torque converter, a transmission and a differential device are integrally incorporated. An inner cylinder 11 shown in FIG. 7 of the mount insulator press-fitted into the cylindrical portion 2 of the insulator bracket 1 is supported by a side member 13 forming a part of the vehicle body via a vehicle body side bracket 12. On the other hand, at the opposite end of the engine 9, the engine-side bracket 14 fixed to the engine
And the insulator bracket 15 fixed to this
Via the mount insulator press-fitted into this, and the vehicle body side bracket 17 supporting the inner cylinder 16 thereof,
The engine 9 is supported by a side member 18 forming a part of the vehicle body. Further, in FIG. 7, the engine 9 is supported by a center member 19 extending in the vehicle front-rear direction at the center in the vehicle width direction via a viscous damper 20 that attenuates roll displacement.

As described above, the insulator bracket 1 serves to support the load of the engine 9 on the side member 13 at one end of the engine 9 and, moreover, effectively in a narrow space between the engine 9 and the side member 13. 9 is supported. In particular, the insulator bracket 1 has a box-shaped space 6 formed by a box-shaped structure 6a on the upper side of the inner side portion 4b of the lower-stage mounting portion 4, and the box-shaped space 6 includes the lower portions of both vertical flanges 3 and the lower-stage mounting portion 6. The inner portion 4b of the portion 4 and the lower portion of the cylindrical portion 2 on the vertical flange 3 side are surrounded by the cylindrical portion 2, the vertical flange 3, and the inner portion 4b of the lower mounting portion 4 which surround the box-shaped space 6. Since the rigidity of the mutual connecting portions is high, even the insulator bracket 1 having a structure in which a metal pipe and a plurality of metal plates are welded can have sufficient strength.

8 to 11 show an insulator bracket structure according to the second embodiment of the present invention.
This embodiment is particularly effective when the axial dimension of the cylindrical portion 2 is small, and each of the two vertical flanges 3 is formed in a flat plate shape, and these vertical flanges 3 are orthogonal to the axial direction of the cylindrical portion 2. The lower mounting portion 4 is fixed by inclining it at an angle θ with respect to the surface 21 to be fixed to the cylindrical portion 2.
3S between the two vertical flanges 3 at the position (see FIG. 10).
(See) is enlarged as the distance from the cylindrical portion increases.

Between the lower mounting portion 4 and the upper mounting portion 7, as described in the first embodiment, there is a space between the vertical flanges 3 into which the upper protruding portion 8a of the engine side bracket 8 can be inserted. Although necessary, when the axial dimension of the cylindrical portion 2 is small, if the vertical flange 3 is fixed in a posture in which the vertical flange 3 is orthogonal to the axial direction of the cylindrical portion 2, the vertical flange 3 is a flat plate and the distance between the vertical flanges 3 is narrow. Therefore, it is not possible to secure a space into which the upper protruding portion 8a can be inserted.

On the other hand, in this case, if the vertical flange 3 is bent so that the lower stage mounting portion 4 and the upper stage mounting portion 7 are opened, a bending process is required when the vertical flange 3 is formed from a flat plate. And man-hours increase. However, if the vertical flange 3 is inclined at the angle θ as in this embodiment, it is possible to secure a space for inserting the upper protrusion 8a without bending the vertical flange 3.

Depending on the size of the upper protrusion 8a inserted between the vertical flanges 3, only one vertical flange 3 may be inclined as described above, and the other may be parallel to the surface 21. However, one of the respective angles θ of both vertical flanges 3 may be set to another angle. However, if the angles of both vertical flanges 3 are equal, as in the second embodiment, the balance of the insulator bracket 1 is good, and the vertical flange 3 has the same shape and size, which facilitates the manufacture.

Further, in this embodiment, the notch portion 5 of the lower mounting portion 4 is cut out in a trapezoidal shape, but it may be cut out in an arc shape as in the first embodiment. Further, in this embodiment, since the lower mounting portion 4 remains a flat plate, the bending process is unnecessary. However, if the tongue-shaped portion 4d is a curved surface along the cylindrical portion 2 as in the first embodiment, the insulator is formed. It is also possible to increase the welding distance of the lower mounting portion 4 to the bracket 1. Further, in this embodiment, a part of the upper stage mounting portion 7 projects farther from the cylindrical portion 2 than the edge of the vertical flange 3, but the upper stage mounting portion 7 has the same thickness as the lower stage mounting portion 4 and the vertical flange 3 Since the distance between the two is relatively small, sufficient strength can be obtained. Other configurations and operational effects are the same as those of the first embodiment, and thus duplicated description will be omitted.

12 to 16 show an insulator bracket structure according to the third embodiment of the present invention. In this embodiment, the upper mounting portion 7 and a portion 3a of the vertical flange 3 below the upper mounting portion 7 are formed by bending a single metal plate, and the vertical flange 3 is formed on this.
The portion 3b above the upper mounting portion 7 is welded and fixed. The upper portions 3b of the both vertical flanges 3 are continuous at the upper end, and one metal plate is bent in a downward U shape, and a weld nut 22a is provided on the lower side surface thereof to provide a stay bracket 22 at the upper end. Are formed. By mounting a stay (not shown) on the stay bracket 22 from the engine side, the attachment strength of the insulator bracket 1 to the engine side is increased.

Further, between the upper stage mounting portion 7 and the lower stage mounting portion 4, the portion 3a below the vertical flanges 3 is located on the side farther from the cylindrical portion 2 and closer to the lower stage mounting portion 4. Bends away from each other. In FIGS. 12 and 16, the polygonal line 23 is shown, so that both vertical flanges 3
The space between the lower portions 3a is enlarged on the side farther than the cylindrical portion 2, so that the upper protruding portion 8 of the engine side bracket 8 not shown in this embodiment is the same as the second embodiment.
a can be inserted between the lower portions 3 a of the vertical flange 3.

The upper protruding portion 8a of the engine side bracket 8
As described in the first embodiment, since many are formed thin at the upper portion and thick at the lower portion, the space for the upper protruding portion 8a is bent at the lower portion 3a as described above. This ensures the space between the vertical flanges 3. At the same time, the upper end of the lower portion 3a of both vertical flanges 3 is brought closer to the joint between the upper mounting portion 7 and the upper projecting portion 8a, and the lower portion 3a of both vertical flanges 3 and the upper portion 3a of the vertical flanges 3 and The rigidity with the mounting portion 7 is improved.

In the case of this embodiment, the lower portion 3a of each vertical flange 3 and the upper mounting portion 7 are integral with each other, and the upper portion 3b of each vertical flange 3 is integral with each other. Welding work such as positioning of each part in manufacturing the bracket 1 is easy, and if the weld nut 22a is omitted, both vertical flanges 3 and the upper mounting part 7 can be formed from two parts. . Other configurations and operational effects are the same as those of the first embodiment, and thus duplicated description will be omitted.

In each of the above embodiments, the insulator bracket 1 is formed by welding the cylindrical portion 2 made of a metal pipe, the vertical flange 3 made of a metal plate, the lower mounting portion 4 and the upper mounting portion 7 by welding. However, these embodiments have a remarkable effect when the respective insulator brackets 1 are constructed by welding a metal pipe and a metal plate.

[0033]

According to the invention of claim 1, both vertical flanges, both upper and lower mounting portions bridged between them, and both vertical flanges and both upper and lower mounting portions of the cylindrical portion are attached to them. A box-shaped structure in which a box-shaped space is formed is formed by the part surrounded by the parts. In this way, since the portion where the cylindrical portion, the vertical flange, and the upper and lower mounting portions are joined together has the box-like structure, the rigidity and strength of this portion are improved. Even an insulator bracket in which the lower mounting portion and the lower mounting portion are made of a metal plate and fixed to each other by welding can have sufficient rigidity and strength.

According to claim 2, in addition to the effect of claim 1, since at least one of the vertical flanges is inclined as described above, even if the axial dimension of the cylindrical portion is small, the vertical Even if the vertical flange is formed from a metal plate, it can be bent even if the vertical flange is formed from a metal plate because the vertical flange can be expanded between the vertical flanges and the mating bracket to be attached to the engine or the like can be inserted here without the need for bending. The process is unnecessary and the manufacturing process is shortened.

According to claim 3, in addition to the effect of claim 1, when the part of the mating bracket to be inserted between both vertical flanges is formed thin at the upper portion and thick at the lower portion, It is possible to secure a space in which the lower part is expanded more than the upper part for the inserted part of the side bracket between the vertical flanges, and both vertical flanges are provided at the connecting portion between the upper mounting part and the mating bracket. Since they come closer to each other, the rigidity of the portion below the upper stage mounting portion of both vertical flanges and the rigidity of the upper stage mounting portion are improved.

According to claim 4, in addition to the effect of claim 3, since the upper mounting portion and the portion of the vertical flange below the upper mounting portion are integrated, the cylindrical portion and the lower portion are connected to each other. Positioning becomes easy when welding to the mounting portion. Further, if the portions of the two vertical flanges above the upper mounting portion are formed of, for example, metal plates that are continuous at the upper ends, this can be configured by one metal plate, so that the two vertical flanges and the upper mounting can be mounted. Since the part and the part are composed of two metal plates in total, there is also an effect that the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a side view in which a part of an insulator bracket of a first embodiment is cut away.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a plan view of FIG.

FIG. 4 is a bottom view of FIG.

5A is a perspective view in which a part of FIG. 1 is cut away, and FIG.
FIG. 3 is a perspective view showing a box-shaped structure and an internal box-shaped space.

6 is a perspective view of an engine side bracket used in FIGS. 1 and 2. FIG.

FIG. 7 is an explanatory diagram showing a state in which an engine is mounted using the insulator bracket according to the first embodiment.

FIG. 8 is a side view in which a part of the insulator bracket of the second embodiment is cut away.

FIG. 9 is a plan view of FIG. 8;

FIG. 10 is a bottom view of FIG.

FIG. 11 is a perspective view in which a part of FIG. 8 is cut away.

FIG. 12 is a side view of the insulator bracket of the third embodiment.

FIG. 13 is a front view of FIG. 12;

FIG. 14 is a plan view of FIG. 12;

FIG. 15 is a bottom view of FIG.

16 is a perspective view in which a part of FIG. 12 is cut away.

FIG. 17 is a plan view of a prototype in the middle of completion of the invention.

FIG. 18 is a side view of FIG.

FIG. 19 is a front view of FIG.

[Explanation of symbols]

 1 Insulator bracket 2 Cylindrical part 3 Vertical flange 3a Lower part of vertical flange 3b Upper part of vertical flange 3A Inner surface of vertical flange 4 Lower mounting part 4a Outer part 4b Inner part 4d Tongue part 4A Inner part of lower mounting part Upper surface 5 Notch 6 Box-shaped space 6a Box-shaped structure 7 Upper mounting portion 7A Lower surface of upper mounting portion 8 Engine side bracket 9 Engine

Claims (4)

[Claims] 1. A cylindrical portion that covers the outer periphery of a cylindrical insulator, and a cylindrical portion that is separated from each other in the axial direction of the cylindrical portion and has an upper end portion of the cylindrical portion as a base end and a lower end portion of the cylindrical portion as an end portion. Two vertical flanges that are fixed to the outside, an upper stage mounting portion that is bridged between the vertical intermediate portions of the two vertical flanges, and one and the other vertical flanges that are continuous to the lower ends of the two vertical flanges. In an insulator bracket having a lower mounting portion extending in a direction away from each other, the lower mounting portion is bridged to a position close to the cylindrical portion between both vertical flanges, so that the upper portion of the lower mounting portion is provided with the above-mentioned 2 The surfaces of the two vertical flanges facing each other,
A structure of an insulator bracket characterized by forming a box-shaped space surrounded by a downward surface of the upper mounting portion and an upward surface of the lower mounting portion between the vertical flanges. 2. The two vertical flanges are each formed in a flat plate shape, and at least one of these vertical flanges is tilted with respect to a plane orthogonal to the axial direction of the cylindrical portion, so that at the position of the lower mounting portion. The structure of the insulator bracket according to claim 1, wherein the distance between the two vertical flanges is increased as the distance from the vertical flange base end increases. 3. Between the upper mounting portion and the lower mounting portion,
Bending the both vertical flanges in a direction away from each other on the side farther from the cylindrical portion and closer to the lower mounting portion,
The structure of the insulator bracket according to claim 1, wherein a space between the both vertical flanges is enlarged. 4. The upper mounting portion and the portion of the vertical flange below the upper mounting portion are formed by bending a single metal plate, and the portion of the vertical flange above the upper mounting portion is fixed to this. The insulator bracket structure according to claim 3, wherein: