JP2008051334A - bracket - Google Patents

Abstract

To provide a bracket capable of appropriately ensuring durability while being excellent in productivity and weight reduction.
An end surface of a bracket body is configured to be attachable to a mounting surface of an engine, a first projecting portion and a second projecting portion are provided on the bracket body, and a mounting surface is formed as a first projecting portion. 31 is formed on the mounting surface 31T, and a receiving surface 32K for sandwiching the inner cylinder of the vibration-insulating rubber bush of the connecting rod is provided on the second projecting portion 32, so that the pair of female screw portions 8 The intermediate portion 33 is set to be thinner than the portion 34 around each female screw portion 8, and the bracket body 4, the first projecting portion 31, and the second projecting portion 32 have an L-shaped cross section when viewed in the first direction. In this way, it is integrally cast with an aluminum alloy.
[Selection] Figure 1

Description

  The present invention relates to a bracket.

  Usually, an anti-vibration device for suppressing transmission of vibration to the vehicle body side is assembled between the vehicle body of the automobile and the engine that is a vibration generation source (see, for example, Patent Document 1 below). As such an anti-vibration device, there is one provided with a connecting rod provided with anti-vibration bushes at both ends in the longitudinal direction of the arm, and a bracket interposed between one of the anti-vibration bushes and the engine. Although the vibration along the longitudinal direction of the arm is mainly input to the vibration isolator and the vibration generated thereby is attenuated by the vibration isolating bush, some load may be transmitted to the bracket and input. . For this reason, as a matter of course, it is necessary to appropriately ensure the durability of the bolts connecting the bracket and the vibration-isolating bushing.

As a bracket provided in the vibration isolator as described above, one formed of an aluminum alloy is known in order to reduce the weight of an automobile. Conventionally, the above-described bracket has been manufactured by cutting almost the entire surface of an aluminum alloy material. However, such a method is not efficient due to the time required for processing. Although it is conceivable to cast the bracket, the durability is lowered when a nest is formed in the molded product.
JP 2005-225321 A

  This invention is made | formed in view of the said situation, The objective is to provide the bracket which can ensure durability suitably, being excellent in productivity and weight reduction.

The above object can be achieved by the present invention as described below. That is, the bracket according to the present invention is
A block-shaped bracket body having a height dimension larger than the width dimension and elongated in the first direction perpendicular to the height direction and the width direction is provided, and a plurality of bolts are inserted through the bracket body along the height direction of the bracket body. One end surface in the height direction of the bracket body is attached to the engine mounting surface by a plurality of first mounting bolts that are formed with holes in the first direction at intervals and are individually inserted into the plurality of bolt insertion holes. It can be attached to the
Of the first projecting portion projecting in a wall shape in the width direction from one side surface of the bracket body in the width direction, and the other end surface in the height direction of the bracket body, the first is located between the pair of bolt insertion holes. The bracket body is provided with a second projecting portion projecting in a wall shape in the height direction from the other end surface portion, and a mounting surface for attaching one end portion of the sandwiching plate is the top surface of the first projecting portion in the first direction. And a pair of female thread portions for screwing together a pair of second mounting bolts, respectively, are formed on the mounting surface with an interval in the first direction,
A receiving surface for receiving the inner cylinder of the vibration isolating rubber bush provided at one end of the connecting rod is provided on the side surface of the top of the second projecting portion, the other end of the connecting rod is provided on the vehicle body, and the holding plate One end portion is attached to the attachment surface by the second attachment bolt, and one end surface in the height direction of the bracket body is attached to the attachment surface of the engine by the first attachment bolt, and the receiving surface is the inner cylinder. Is configured to clamp in the axial direction of the inner cylinder in cooperation with the other end of the clamping plate,
In a cross section in a direction orthogonal to the protruding direction of the first protruding portion, a portion between the pair of female screw portions is set to be thinner than a portion around the pair of female screw portions,
The bracket body, the first projecting portion, and the second projecting portion are integrally cast with an aluminum alloy so as to form an L-shaped cross section when viewed in the first direction.

  (A) With the above configuration, one end surface of the bracket body in the height direction is attached to the mounting surface of the engine by the plurality of first mounting bolts inserted through the plurality of bolt insertion holes of the bracket body. A mounting surface is provided on the top surface of the first projecting portion projecting in a wall shape from one side surface of the bracket body in the width direction, and a pair of second mounting bolts are provided on the pair of female screw portions formed on the mounting surface. It is screwed separately and the one end part of a clamping plate is fixed to an attachment surface. Of the other end surface in the height direction of the bracket body, the second projecting portion projects in a wall shape from the first other end surface portion located between the pair of bolt insertion holes, and on the side surface of the top portion of the second projecting portion. An inner cylinder of an anti-vibration rubber bush provided at one end of the connecting rod is clamped in the axial direction between the provided receiving surface and the other end of the holding plate (the other end of the connecting rod is connected to the vehicle body).

  (B) To manufacture the bracket, after casting the bracket body, the first projecting portion, and the second projecting portion, one end surface in the height direction of the bracket body and the other end surface in the height direction of the bracket body Of these, at least the second other end surface portion fastened to the first mounting bolt, the mounting surface provided on the top surface of the first projecting portion, and the receiving surface provided on the side surface of the top portion of the second projecting portion are cut. The cutting time can be shortened as compared with a method of manufacturing a bracket by cutting almost the entire surface of an aluminum alloy material as in the prior art.

  (C) The bracket body is made compact in the form of an elongated block in the first direction perpendicular to the height direction and the width direction, the height dimension being larger than the width dimension, and the projection direction of the first projecting portion In a cross section in the orthogonal direction, a portion between the pair of female screw portions is set to be thinner than a portion around the pair of female screw portions, and the first projecting portion has strength and enhanced durability. Thus, since the volume of the first protrusion is reduced, it is possible to prevent the formation of nests during casting.

  (D) In this bracket, since the inner cylinder of the vibration isolating bush is clamped between the receiving surface of the second protrusion and the other end of the clamping plate as described above, the bracket is inclined with respect to the longitudinal direction of the arm of the connecting rod. When a load is input in the direction, the load is easily transmitted and input to the clamping plate, and is also input to the second mounting bolt that fixes one end of the clamping plate. For this reason, in the present invention, a pair of female screw portions are provided on the mounting surface, whereby the action of the shearing force can be shared by the respective second mounting bolts to enhance durability. As a result, in the bracket of the present invention, productivity and weight reduction are good, and durability can be appropriately ensured.

In the present invention described above,
The plurality of bolt insertion holes are constituted by a total of three bolt insertion holes, a first bolt insertion hole, a second bolt insertion hole, and a third bolt insertion hole, and the first bolt insertion hole and the first bolt insertion hole The distance between the second bolt insertion hole and the second bolt insertion hole is set larger than the distance between the second bolt insertion hole and the third bolt insertion hole;
The first protrusion is protruded from one side surface portion located between the first bolt insertion hole and the second bolt insertion hole, of one side surface in the width direction of the bracket body, and the second protrusion Projecting from the first other end surface portion located between the first bolt insertion hole and the second bolt insertion hole,
The width dimension of the bracket body part between the second bolt insertion hole and the third bolt insertion hole is the width of the bracket body part between the first bolt insertion hole and the second bolt insertion hole. If it is set smaller than the dimensions, the following effects can be obtained.

  (E) The interval between the first bolt insertion hole and the second bolt insertion hole is set to be larger than the interval between the second bolt insertion hole and the third bolt insertion hole, and the first projecting portion is attached to the bracket. Since it protrudes from one side surface portion located between the first bolt insertion hole and the second bolt insertion hole in one side surface in the width direction of the main body, the longitudinal direction of the bracket body (the first direction) The length of the first protrusion in can be set large. And since the 2nd protrusion part is made to protrude from the 1st other end surface part located between the 1st bolt insertion hole and the 2nd bolt insertion hole, the 2nd protrusion part in the longitudinal direction of a bracket main part The length can be set large. Thereby, the strength of the first protrusion and the second protrusion to which a large force is applied can be increased and sufficient durability can be ensured.

  (F) The width of the bracket body portion between the second bolt insertion hole and the third bolt insertion hole is the width of the bracket body portion between the first bolt insertion hole and the second bolt insertion hole. Since it is set smaller than the dimension, the nest is less likely to occur during casting. The bracket body portion between the second bolt insertion hole and the third bolt insertion hole is not applied with a greater force than the bracket body portion between the first bolt insertion hole and the second bolt insertion hole. Therefore, no problem occurs even if the width dimension is reduced as described above.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. 4 and 5 show an aluminum alloy bracket 100 for connecting the torque rod R (an example of a connecting rod) to the engine E. FIG. As shown in both figures, a first vibration isolating rubber bush B is provided at one end portion 40 of the torque rod R, a second anti-vibration rubber bushing is provided at the other end portion 41, and the second anti-vibration rubber bush is provided as a vehicle body 42 of the automobile. The first anti-vibration rubber bush B is attached to the engine E via the bracket 100. The first anti-vibration rubber bush B includes an inner cylinder 1, an outer cylinder 2, and a rubber-like elastic body 3 that connects them. The second anti-vibration rubber bush has the same structure. The outer cylinder 2 of the first anti-vibration rubber bush B is press-fitted into a ring member 17 provided at one end 40 of the torque rod R.

  The bracket 100 will be described in detail. As shown in FIGS. 1 to 3, a block-shaped bracket having a height dimension H larger than a width dimension D and elongated in a first direction N perpendicular to the height direction Z and the width direction W. A main body 4 is provided. A plurality of bolt insertion holes 11, 12, 13 along the height direction Z of the bracket body 4 are formed in the bracket body 4 at intervals in the first direction N (longitudinal direction N of the bracket body 4). The one end surface 5 in the height direction Z of the bracket body 4 is configured to be attachable to the mounting surface 14 of the engine E with a plurality of first mounting bolts 21 that are individually inserted into the bolt insertion holes 11, 12, 13. Yes (see FIG. 4).

  A plurality of bolt insertion holes 11, 12, 13 are arranged in order in the first direction N, and a total of three bolts including a first bolt insertion hole 11, a second bolt insertion hole 12, and a third bolt insertion hole 13. An interval between the first bolt insertion hole 11 and the second bolt insertion hole 12 that are adjacent to each other is formed between the second bolt insertion hole 12 and the third bolt insertion hole 13 that are adjacent to each other. It is set larger than the interval. Each of the bolt insertion holes 11, 12, 13 is formed as an oblong hole having an oval cross section that is long in the first direction N.

  The bracket 100 includes a bracket body 4, a first protrusion 31, and a second protrusion 32 as shown in FIGS. 1 to 3, and these have a cross section L as viewed in the first direction N (side view) as shown in FIG. It is integrally cast with an aluminum alloy so as to form a letter shape. The first protrusion 31 protrudes in a wall shape from the one side surface 7 of the width direction W of the bracket body 4 in the width direction W, and the length in the first direction N is smaller than that of the bracket body 4 as shown in FIG. 2, the length in the height direction Z is made smaller than that of the bracket body 4. Moreover, the 2nd protrusion part 32 protrudes in the wall direction from the other end surface 6 of the height direction Z of the bracket main body 4 to the height direction Z, and the length of the 1st direction N is longer than the bracket main body 4 as shown in FIG. Is also made smaller.

  As shown in FIGS. 1 to 3, the first projecting portion 31 includes a first bolt insertion hole 11 and a second bolt insertion hole 12 in one side surface 7 of the width direction W of the bracket body 4 when viewed from the front. It protrudes from one side surface portion 7A located between the two, and has a rectangular shape in plan view with a constant length in the first direction N. Further, the second projecting portion 32 has a pair of adjacent bolt insertion holes 11 and 12 (the first bolt insertion hole 11 and the second bolt insertion hole 12) on the other end face 6 in the height direction Z of the bracket body 4. ) Projecting in the height direction Z from the first other end surface portion 6A located between the first and second end surfaces, and having a triangular shape in which the length in the first direction N is gradually reduced toward the top and the tip is rounded in front view. .

  Further, an attachment surface 31T for attaching one end 15A of the sandwiching plate 15 (see FIGS. 4 and 5) is provided on the top surface of the first projecting portion 31 along the first direction N, and for attaching and fixing the sandwiching plate 15 A pair of first female screw portions 8 to which the pair of second mounting bolts 22 are screwed together is formed on the mounting surface 31T with a gap in the first direction N and along the width direction W.

  And the receiving surface 32K which receives the inner cylinder 1 of the 1st anti-vibration rubber bush B provided in the one end part 40 of the connection rod R is provided in the side surface of the top part of the 2nd protrusion part 32, and the other end part 41 of the connection rod R Is attached to the vehicle body 42 of the automobile, one end 15A of the clamping plate 15 is attached to the attachment surface 31T by the second attachment bolt 22, and one end surface 5 in the height direction Z of the bracket body 4 is attached to the engine E by the first attachment bolt 21. The receiving surface 32 </ b> K is configured to clamp the inner cylinder 1 in the axial direction J of the inner cylinder 1 in cooperation with the other end portion 15 </ b> B of the clamping plate 15 while being attached to the surface 14.

  The clamping structure will be described. The third mounting bolt 16 is inserted into the bolt insertion hole formed in the other end portion 15B of the clamping plate 15 and the inner cylinder 1 of the first vibration isolating rubber bush B. 16 is screwed into one second female thread portion 9 formed on the receiving surface 32K. That is, the third mounting bolt 16 is screwed and fastened to the second female threaded portion 9, whereby the inner cylinder 1 is sandwiched and fixed in the axial direction J between the other end portion 15B of the sandwiching plate 15 and the receiving surface 32K. As shown in FIG. 4, the clamping plate 15 has a length in the first direction N of one end portion 15A that is longer than that of the other end portion 15B so that the pair of second mounting bolts 22 and third mounting bolts 16 can be attached. It is made larger.

  In the cross section in the direction (height direction Z) orthogonal to the protruding direction of the first protruding portion 31, the portion 33 between the pair of first female screw portions 8 is thinner than the portion 34 around each first female screw portion 8. It is set to. Thereby, it is prevented that a nest is generated in the first projecting portion 31 at the time of casting, and the first projecting portion 31 has strength and enhances durability. A portion 34 around the first female screw portion 8 has a cylindrical shape. Further, the width dimension d1 of the bracket main body portion 4B between the second bolt insertion hole 12 and the third bolt insertion hole 13 is set between the first bolt insertion hole 11 and the second bolt insertion hole 12. It is set smaller than the width dimension d2 of the bracket body portion 4A (same as the width dimension D). Thereby, it becomes difficult to generate a nest in the bracket body 4 at the time of casting, and the durability can be improved.

  And among the one end surface 5 in the height direction Z of the bracket body 4 and the other end surface 6 in the height direction Z of the bracket body 4, the second other end surface portion 6B fastened to the first mounting bolt 21, The bracket body 4, the first projecting portion 31, and the second projecting portion 31 </ b> T are provided on the mounting surface 31 </ b> T provided on the top surface of the projecting portion 31 and the receiving surface 32 </ b> K provided on the side surface of the top portion of the second projecting portion 32. The protrusion 32 is integrally cast with an aluminum alloy. The attachment surface 31T is a top surface of the portion 34 around the pair of first female screw portions 8. Each of the above surfaces 5, 6B, 31T, and 32K where the machining allowance is left is machined after casting. Thereby, compared with the case where it manufactures by cutting the substantially whole surface of the conventional aluminum alloy material, cutting time is reduced significantly.

  Further, when a load is input in a direction inclined with respect to the longitudinal direction of the arm of the connecting rod R (the horizontal direction in FIGS. 1 and 4), for example, the horizontal direction in FIG. A load is easily transmitted and input to the clamping plate 15 and is also input to the second mounting bolt 22 that fixes one end portion 15A of the clamping plate 15. In this bracket 100, the female screw portion 8 is connected to the first protruding portion 31. As a pair, the action of the shearing force can be shared by each of the second mounting bolts 22 and the durability can be enhanced.

[Another embodiment]
As shown in FIG. 6, among the other end surface 6 in the height direction Z of the bracket body 4, the machining allowance is applied to the entire surface of the other end surface portion 6B other than the first other end surface portion 6A from which the first projecting portion 31 projects. Alternatively, the bracket body 4, the first projecting portion 31, and the second projecting portion 32 may be integrally cast with an aluminum alloy. As shown in FIG. 6, the top surface of the portion 33 between the pair of first female screw portions 8 is included in the mounting surface 31T as a part of the mounting surface 31T, and the top surface (mounting surface 31T) also includes the machining allowance. The bracket main body 4, the first projecting portion 31, and the second projecting portion 32 may be integrally cast with an aluminum alloy.

Top view of bracket Front view of bracket Side view of bracket Front view showing connecting structure of connecting rod, bracket and engine Side view showing connecting structure of connecting rod, bracket and engine Front view of bracket according to another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner cylinder 4 Bracket main body 4A Bracket main-body part 4B between 1st bolt insertion hole and 2nd bolt insertion hole Bracket main-body part 5 between 2nd bolt insertion hole and 3rd bolt insertion hole 5 Bracket One end surface 6 in the height direction of the main body The other end surface 6A in the height direction of the bracket main body The first other end surface portion 6B The second other end surface portion 7 One side surface 7A in the width direction of the bracket main body One side surface portion 8 The first female screw portion 9 2 female threaded portion 11 first bolt insertion hole 12 second bolt insertion hole 13 third bolt insertion hole 14 engine mounting surface 15 clamping plate 15A clamping plate one end 15B clamping plate other end 16 third mounting Bolt 17 Ring member 21 First mounting bolt 22 Second mounting bolt 31 First protrusion 31T Mounting surface (top surface)
32 2nd protrusion part 32K receiving surface (side surface of the top part of a 2nd protrusion part)
33 A portion between the pair of female screw portions 34 A portion around the female screw portion 40 One end portion 41 of the connecting rod 41 Other end portion 42 of the connecting rod Automobile body 100 Bracket B Anti-vibration rubber bush D Width (width of the bracket body)
E Engine d1 Width dimension of the bracket body part between the second bolt insertion hole and the third bolt insertion hole d2 Width dimension of the bracket body part between the first bolt insertion hole and the second bolt insertion hole H Height dimension J Axial direction N First direction (longitudinal direction of bracket body)
R connecting rod (torque rod)
W Width direction Z Height direction (direction perpendicular to the first protrusion)

Claims (2)

A block-shaped bracket body having a height dimension larger than the width dimension and elongated in the first direction perpendicular to the height direction and the width direction is provided, and a plurality of bolts are inserted through the bracket body along the height direction of the bracket body. One end surface in the height direction of the bracket body is attached to the engine mounting surface by a plurality of first mounting bolts that are formed with holes in the first direction at intervals and are individually inserted into the plurality of bolt insertion holes. It can be attached to the
Of the first projecting portion projecting in a wall shape in the width direction from one side surface of the bracket body in the width direction, and the other end surface in the height direction of the bracket body, the first is located between the pair of bolt insertion holes. The bracket body is provided with a second projecting portion projecting in a wall shape in the height direction from the other end surface portion, and a mounting surface for attaching one end portion of the sandwiching plate is the top surface of the first projecting portion in the first direction. And a pair of female thread portions for screwing together a pair of second mounting bolts, respectively, are formed on the mounting surface with an interval in the first direction,
A receiving surface for receiving the inner cylinder of the vibration isolating rubber bush provided at one end of the connecting rod is provided on the side surface of the top of the second projecting portion, the other end of the connecting rod is provided on the vehicle body, and the holding plate One end portion is attached to the attachment surface by the second attachment bolt, and one end surface in the height direction of the bracket body is attached to the attachment surface of the engine by the first attachment bolt, and the receiving surface is the inner cylinder. Is configured to clamp in the axial direction of the inner cylinder in cooperation with the other end of the clamping plate,
In a cross section in a direction orthogonal to the protruding direction of the first protruding portion, a portion between the pair of female screw portions is set to be thinner than a portion around the pair of female screw portions,
A bracket in which the bracket body, the first projecting portion, and the second projecting portion are integrally cast with an aluminum alloy so as to form an L-shaped cross section when viewed in the first direction. The plurality of bolt insertion holes are constituted by a total of three bolt insertion holes, a first bolt insertion hole, a second bolt insertion hole, and a third bolt insertion hole, and the first bolt insertion hole and the first bolt insertion hole The distance between the second bolt insertion hole and the second bolt insertion hole is set larger than the distance between the second bolt insertion hole and the third bolt insertion hole;
The first protrusion is protruded from one side surface portion located between the first bolt insertion hole and the second bolt insertion hole, of one side surface in the width direction of the bracket body, and the second protrusion Projecting from the first other end surface portion located between the first bolt insertion hole and the second bolt insertion hole,
The width dimension of the bracket body part between the second bolt insertion hole and the third bolt insertion hole is the width of the bracket body part between the first bolt insertion hole and the second bolt insertion hole. The bracket according to claim 1, wherein the bracket is set smaller than a dimension.

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