JP2007237949A - Center bearing support mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure for bolting a bracket 1 for holding a center bearing support to a vehicle body side 21 via a vibration-isolating bush 11 which is simple in structure of the vibration-isolating bush 11, and capable of reducing the cost for components, and preventing bush bodies 12, 13 from being dropped from the bracket 1 before mounting the bracket 1 on the vehicle body side 21. <P>SOLUTION: The vibration-isolating bush 11 comprises a pair of rubber-like elastic bush bodies 12, 13 for holding an opening circumferential edge of a mounting hole 1a formed in the bracket 1, and a collar 14 to be assembled to inner circumferential sides of the bush bodies 12, 13 in a non-adhesive manner. A clamping margin is set between the bush bodies 12, 13 and the collar 14, and reinforcing rings 16, 17 formed of a rigid material such as a metal are embedded in a clamping margin setting parts 12a, 13a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mounting structure for a center bearing support that elastically supports a propeller shaft that is suspended from a lower surface of a vehicle body in a vehicle such as an automobile and is horizontally mounted on the lower side of the vehicle body.

  The center bearing support is attached to the vehicle body via a bracket. As shown in FIG. 2 as one of the types, the bracket 52 for holding the center bearing support 51 is connected to the vehicle body side 54 (see FIG. 3) via an anti-vibration bush 53. A structure for mounting a center bearing support that is bolted to) is known.

  In this conventional mounting structure, as shown in an enlarged view in FIG. 3, the vibration-proof bushing 53 is formed by vulcanizing and bonding a rubber-like elastic bushing body 58 between an outer peripheral mounting bracket 56 and an inner peripheral mounting bracket (collar) 57. The upper vulcanized molded product 55 is combined with the lower vulcanized molded product 59 in which a rubber-like elastic bushing body 62 is vulcanized and bonded between the outer peripheral mounting bracket 60 and the inner peripheral mounting bracket 61. By sandwiching the opening peripheral edge of the mounting hole 52 a provided in the bracket 52 between the upper and lower outer peripheral mounting brackets 56, 60 and sandwiching the upper inner peripheral mounting bracket (collar) 57 between the bolt head 63 and the vehicle body side 54. It is configured to be mounted.

  The anti-vibration bush 53 is capable of exhibiting an excellent anti-vibration function due to the elasticity of the bush bodies 58 and 62, and two vulcanized molded products 55 and 59 each having three components as its constituent elements. (There are six component components), there is a disadvantage that the structure is complicated and the component cost is high.

Japanese Utility Model Publication No. 2-75319 JP 2000-177417 A

  In view of the above, the present invention has a relatively simple structure of the vibration-proof bush attached to the bracket, can reduce the cost of the parts, and the bush body falls off from the bracket before the bracket is attached to the vehicle body. An object of the present invention is to provide a structure for mounting a center bearing support that does not occur.

  In order to achieve the above object, the mounting structure of the present invention is a mounting structure for a center bearing support in which a bracket for holding a center bearing support is bolted to the vehicle body side via a vibration isolating bush. A pair of rubber-like elastic bush bodies sandwiching the peripheral edge of the opening of the mounting hole provided on the collar, and a collar that is assembled non-adheringly to the inner peripheral side of the bush body. A margin is set, and a reinforcing ring made of a rigid material such as a metal is embedded in the interference margin setting portion of the bush body.

  In the mounting structure of the present invention having the above-described configuration, the vibration-proof bushing attached to the bracket is composed of a pair of bush bodies and collars in which a reinforcing ring is embedded, and has five component parts (upper bush body and reinforcement). Ring, lower bush body, reinforcing ring and collar).

  Further, according to the mounting structure of the present invention, since the bush main body and the collar are assembled without bonding, there is a concern that the bush main body may fall off the bracket before the bracket is attached to the vehicle body side. Since the interference is set between the collars, the bushing body is held by the collars. Furthermore, there is a risk that the bushing body will fall off the bracket when an impact or the like is input if it is only setting the interference allowance, but a reinforcing ring made of a rigid material such as metal is embedded in the interference allowance setting portion in the bushing body. In addition, there is no looseness in the holding due to the interference.

  The present invention has the following effects.

  That is, in the mounting structure of the present invention, as described above, the vibration-proof bushing attached to the bracket is composed of a pair of bush bodies embedded with a reinforcing ring and a collar. Has been. Therefore, the structure of the anti-vibration bush can be simplified compared to the conventional case, and the component cost can be reduced.

  In addition, since the interference margin is set between the bush body and the collar, the bush body is held by the collar. Therefore, it is possible to prevent the bushing body from falling off the bracket before the bracket is attached to the vehicle body side.

  Furthermore, since a reinforcing ring made of a rigid material such as metal is embedded in the interference allowance setting portion in the bush body, the holding due to the interference does not loosen. Therefore, it is possible to prevent the bush body from falling off the bracket before the bracket is attached to the vehicle body side even when an impact or the like is input.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a cross section of an anti-vibration bush used in a mounting structure according to an embodiment of the present invention.

  The mounting structure according to the embodiment is configured to bolt the bracket 1 holding a center bearing support (not shown) to the vehicle body side 21 via the vibration isolating bush 11 and is particularly configured as follows. It is characterized in that it has an anti-vibration bush 11.

  That is, the anti-vibration bush 11 includes a pair of upper and lower rubber-made elastic bush bodies 12 and 13 and a collar 14 that is assembled non-adhered to the inner peripheral side of the bush bodies 12 and 13. The opening peripheral edge of the mounting hole 1a provided in 1 is sandwiched between a pair of upper and lower bush bodies 12 and 13, and the collar 14 is inserted into the inner peripheral side of the bush bodies 12 and 13 so as to be assembled to the bracket 1. Has been. When the bracket 1 is attached to the vehicle body side 21, the bolt 15 is inserted from below the collar 14 and the bolt 15 is fastened to the vehicle body side 21.

  Before the bolt 15 is inserted into the collar 14, the lower bushing body 13 is between the bracket 1 and the collar 14 and is free to move downward. Therefore, in the mounting structure, a tightening margin is set between the bush main body 13 and the collar 14, and a reinforcing ring 17 made of a rigid material such as metal is embedded in the tightening margin setting portion 13 a of the bush main body 13. When the interference allowance is set between the bush main body 13 and the collar 14 in this way, the collar 14 holds the bush main body 13 and the bush main body 13 is held by the collar 14, so that the bracket 1 is attached to the vehicle body side 21. It is possible to prevent the bush body 13 from falling off the bracket 1 until the bolt 15 is tightened. Further, since the reinforcing ring 17 is embedded in the interference allowance setting portion 13a of the bush main body 13, the above-described interference is not loosened by the reinforcing action of the reinforcing ring 17, so that the bracket can be used even when an impact or the like is input. The bush main body 13 can be prevented from falling off the bracket 1 until 1 is attached to the vehicle body side 21.

  In the mounting structure, not only the lower bushing body 13 but also the upper bushing body 12 is set with a crimping margin between the bushing body 12 and the collar 14 and the bushing body 12 has a crimping margin. A reinforcing ring 16 made of a rigid material such as metal is embedded in the margin setting portion 12a. According to this configuration, it is possible to realize common parts specifications for the upper and lower bush bodies 12 and 13.

  Details of each component are as follows.

  That is, first, the upper and lower bush bodies 12 and 13 are each formed in an annular shape by a predetermined rubber-like elastic body, and flange-shaped sandwiching portions 12b and 13b for sandwiching the opening peripheral portion of the bracket 1 from above and below, and the bracket A cylindrical abutting portion 12c, 13c that is abutted against each other on the inner peripheral side of one opening peripheral portion is integrally provided. These sandwiching portions 12b and 13b and butting portions 12c and 13c are elastically deformed at the time of vibration input, thereby achieving a vibration isolating function. Further, as described above, the interference allowance setting portions 12 a and 13 a are integrally provided on the inner peripheral portions of the bush bodies 12 and 13, and the interference allowance setting portions 12 a and 13 a have an inner diameter dimension that is an outer diameter dimension of the collar 14. By setting it smaller than this, the interference margin is set here. The interference margin setting portions 12a and 13a are the inner diameter dimensions of the bush bodies 12 and 13, that is, the inner diameter dimensions. Further, the inner peripheral surfaces of the interference allowance setting portions 12a and 13a, that is, the inner peripheral surfaces of the bush bodies 12 and 13 are formed in a cylindrical surface shape.

  The collar 14 is formed into a cylindrical shape with a predetermined resin or the like, and its outer diameter dimension is set to be larger than the inner diameter dimension of the bush bodies 12 and 13, thereby setting the seam allowance as described above. An outward flange portion 14a is integrally formed at the upper end portion of the collar 14, and this flange portion 14a is sandwiched between the vibration isolating bush 11 and the vehicle body side 21 when mounted.

  The bolt 15 is a general headed bolt, and the outer diameter of the head 15 a is set larger than the inner diameter of the bush bodies 12 and 13 and the outer diameter of the collar 14. Therefore, when the bolt 15 is inserted into the collar 14 and fastened to the vehicle body side 21, the collar 14 is sandwiched between the head portion 15a and the vehicle body side 21, and a pair of upper and lower portions is interposed between the head portion 15a and the flange portion 14a of the collar 14. Bush bodies 12 and 13 are sandwiched.

  Reinforcing rings 16 and 17 are each formed into a ring shape by sheet metal, and cylindrical portions 16a and 17a are integrally provided at the inner peripheral ends thereof. Thus, when cylindrical part 16a, 17a is provided in the inner peripheral edge part of the reinforcement rings 16 and 17, since the axial direction width | variety of the reinforcement rings 16 and 17 is expanded substantially, the interference allowance reinforcement effect is increased. Can do. The inner diameter dimensions of the reinforcing rings 16 and 17 are set smaller than the outer diameter dimension of the flange portion 14 a and the outer diameter dimension of the head portion 15 a, and larger than the outer diameter dimension of the collar 14. Since the reinforcing rings 16 and 17 are embedded in the bushing bodies 12 and 13, a rubber-like material attached between the reinforcing rings 16 and 17 and the collar 14 on the inner peripheral surface of the reinforcing rings 16 and 17. An elastic body is interposed.

  According to the mounting structure of the above configuration, as described above, the vibration isolating bush 11 attached to the bracket 1 is composed of the pair of bush bodies 12 and 13 in which the reinforcing rings 16 and 17 are embedded and the collar 14. The structural element is composed of five parts including an upper bush body 12 and a reinforcing ring 16, and a lower bush body 13, a reinforcing ring 17 and a collar 14. Therefore, the structure of the anti-vibration bush 11 can be simplified as compared with the conventional case, and the component cost can be reduced.

  In addition, since the interference margin is set between the bush bodies 12 and 13 and the collar 14, the bush bodies 12 and 13 can be held by the collar 14. Therefore, it is possible to prevent the bushing bodies 12 and 13 from falling off the bracket 1 until the bracket 1 is attached to the vehicle body side 21.

  Further, since the reinforcement rings 16 and 17 are embedded in the interference allowance setting portions 12a and 13a in the bush bodies 12 and 13, even if an impact or the like is input, the holding due to the interference does not loosen. Therefore, it is possible to prevent the bushing bodies 12 and 13 from falling off the bracket 1 until the bracket 1 is attached to the vehicle body side 21 even when an impact or the like is input.

  In addition, since the upper and lower bush bodies 12 and 13 in which the reinforcing rings 16 and 17 are embedded have a vertically symmetric structure and have a part structure with the same specifications, common parts are realized. Therefore, parts cost can be reduced also from this point.

  Furthermore, since the cylindrical portions 16a, 17a are integrally formed at the inner peripheral ends of the reinforcing rings 16, 17 embedded in the bush bodies 12, 13, the axial width of the reinforcing rings 16, 17 is substantially enlarged. ing. Accordingly, the interference margin reinforcing effect by the reinforcing rings 16 and 17 is set to be large.

Sectional drawing of the principal part of the mounting structure which concerns on the Example of this invention Explanatory drawing of the mounting structure according to the conventional example Sectional view of the principal part of the mounting structure according to the conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bracket 1a Mounting hole 11 Anti-vibration bush 12, 13 Bushing body 12a, 13a Clamping margin setting part 12b, 13b Clamping part 12c, 13c Butt part 14 Collar 14a Flange part 15 Bolt 15a Head part 16, 17 Reinforcement ring 16a, 17a Tube Shaped part 21 Body side

Claims (1)

In the mounting structure of the center bearing support in which the bracket (1) holding the center bearing support is bolted to the vehicle body side (21) via the vibration isolating bush (11).
The anti-vibration bush (11) includes a pair of rubber-like elastic bush bodies (12) (13) sandwiching an opening peripheral edge portion of a mounting hole (1a) provided in the bracket (1), and the bush body (12 ) (13) has a collar (14) assembled non-adheringly on the inner peripheral side of
An interference allowance is set between the bush main body (12) (13) and the collar (14), and the interference allowance setting portion (12a) (13a) in the bush main body (12) (13) is made of a rigid material such as metal. Center bearing support mounting structure characterized in that reinforcing rings (16) (17) are embedded.

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