JP2007238011A - Mounting structure of center bearing support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a center bearing support 1 whereby the support 1 having a support rubber 2 is pinched by a pair of brackets 11 and 12 which are fastened to a vehicle body by bolts, capable of keeping the brackets 11 and 12 and the center bearing support 1 in the assembled condition even if they are not welded to each other. <P>SOLUTION: The brackets 11 and 12 have bolt insert holes 11c and 12c whose inner surfaces are furnished with threaded parts 11e and 12e, and bolts 21 are driven into the threaded parts 11e and 12e in the condition that the center bearing support 1 is pinched by the two brackets 11 and 12, and thereby the brackets 11 and 12 are assembled in such a condition as not welded to each other. <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. More specifically, as shown in FIG. 6, the center bearing support 51 having a support rubber 52 is sandwiched between a pair of upper and lower brackets 53, 54, and the brackets 53, 54 are inserted into the vehicle body. It is mounted by bolting 56 to 55.

  However, the prior art has the following problems.

  That is, in the above conventional mounting structure, the center bearing support 51 having the support rubber 52 is sandwiched between the pair of brackets 53 and 54, and then the brackets 53 and 54 are welded to each other (the welded portion is indicated by reference numeral 57). . However, since the brackets 53 and 54 are bolted 56 to the vehicle body 55 as described above, the welding of the brackets 53 and 54 works until the brackets 53 and 54 are fixed to the vehicle body 55 (the brackets 53 and 54 and However, if the brackets 53 and 54 are bolted 56 to the vehicle body 55, it is unnecessary to weld the brackets 53 and 54 to each other. It is done.

  Further, when the brackets 53 and 54 are welded, the assembly including the brackets 53 and 54 and the center bearing support 51 can no longer be disassembled. Therefore, sufficient surface treatment cannot be performed on the brackets 53 and 54 after welding, and the corrosion resistance is deteriorated particularly in the vicinity of the welded portion 57.

Japanese Utility Model Publication No. 50-35933 JP 2000-79827 A Japanese Patent No. 3709909

  In view of the above, the present invention has a center bearing support mounting structure in which a center bearing support having a support rubber is sandwiched between a pair of brackets and the bracket is bolted to a vehicle body, and these are not welded to each other. It is an object of the present invention to provide a mounting structure in which the bracket and the center bearing support can be kept in an assembled state, so that the welding process of the bracket can be omitted and disassembled after the assembly.

  To achieve the above object, a mounting structure according to claim 1 of the present invention is a mounting structure for a center bearing support in which a center bearing support having a support rubber is sandwiched between a pair of brackets, and the bracket is bolted to a vehicle body. A screw part is provided on the inner surface of the bolt insertion hole in the above, and the pair of brackets are assembled without being welded to each other by screwing the bolt into the screw part in a state where the center bearing support is sandwiched between the pair of brackets. It is a feature.

  The mounting structure according to claim 2 of the present invention is the mounting structure of the center bearing support according to claim 1 described above, wherein the threaded portion has a valley diameter larger than the short width of the long hole-shaped bolt insertion hole. The bolt has a constricted portion between a screw portion screwed into the screw portion and the head, and the constricted portion has a diameter smaller than the short width of the bolt insertion hole and a length larger than the thickness of the bracket. It is characterized by having.

  Further, the mounting structure according to claim 3 of the present invention is used for mounting the bracket to the vehicle body as it is in the mounting structure of the center bearing support according to claim 1 or 2, as it is, with the bolts for assembling a pair of brackets as they are. It is characterized by this.

  In the mounting structure according to the first aspect of the present invention having the above-described configuration, the pair of brackets are connected to each other by screwing the bolts into the screw portions provided on the inner surfaces of the bolt insertion holes in the bracket. Therefore, by screwing the bolt into the threaded portion with the center bearing support sandwiched between the pair of brackets, the pair of brackets and the center bearing support can be maintained in an assembled state without welding the pair of brackets to each other. It becomes possible.

  According to a second aspect of the present invention, the threaded portion has a valley diameter larger than the short width of the long hole-shaped bolt insertion hole, and the bolt is constricted between the threaded portion screwed into the threaded portion and the head portion. When a diameter smaller than the short width of the bolt insertion hole and a length larger than the thickness of the bracket are set in the constricted portion, the pair of brackets are located between the screw portion of the bolt and the head. Assembled in a state of being sandwiched. Therefore, it is possible to prevent the threaded portion of the bolt from falling off the bolt insertion hole. When disassembling the bracket, the screw portion of the bolt is rotated in the screw release direction along the screw portion provided on the inner surface of the bolt insertion hole. A bolt provided with a constricted portion between a screw portion and a head portion may be referred to as a so-called stepped bolt.

  Further, as described in claim 3, the bolt can be used as it is for mounting the bracket to the vehicle body.

  The present invention has the following effects.

  That is, in the mounting structure according to the first aspect of the present invention, as described above, the pair of brackets are connected to each other by screwing the bolts into the screw portions provided on the inner surfaces of the bolt insertion holes in the bracket. Therefore, by screwing the bolt into the threaded portion with the center bearing support sandwiched between the pair of brackets, the pair of brackets and the center bearing support can be maintained in an assembled state without welding the pair of brackets to each other. It is possible. Therefore, the welding process between the brackets can be omitted, and the assembly work can be facilitated.

  Also, since the brackets are not welded together, the pair of brackets and the center bearing support can be disassembled by removing the bolts once screwed. Therefore, it can be disassembled as necessary to provide sufficient surface treatment to the bracket, or only some parts (for example, center bearing support) can be replaced with new ones as needed, improving the maintainability. Can do.

  In addition, in the mounting structure according to claim 2 of the present invention, as described above, the screw portion has a valley diameter larger than the short width of the elongated hole insertion hole, and the bolt is screwed into the screw portion. A pair of brackets has a constricted portion between the screw portion and the head, and a diameter smaller than the short width of the bolt insertion hole and a length larger than the thickness of the bracket are set in the constricted portion. It is assembled in a state of being sandwiched between the screw part of the bolt and the head. Therefore, it is possible to effectively prevent the threaded portion of the bolt once screwed from dropping from the bolt insertion hole.

  In the mounting structure according to claim 3 of the present invention, as described above, since the bolt for assembling the pair of brackets is used for mounting the bracket to the vehicle body as it is, it is necessary to prepare a mounting bolt for mounting. There is no. Therefore, it is possible to eliminate the waste of the bolts, and the mounting operation can be completed simply by screwing the bolts already assembled with the brackets into the vehicle body, so that the mounting operation can be facilitated.

  The present invention includes the following embodiments.

In the center bearing support that is mounted on the car body with a two-part bracket,
(1) Stepped bolts having a constriction with a diameter C smaller than the short width A by setting a screw having a valley diameter B larger than the short width A in the bolt through hole (long hole) of the bracket divided into two ( It is characterized by having a structure for temporarily fixing the two-divided bracket by passing the effective diameter B).
(2) At this time, the width E of the constriction of the stepped bolt is set to be larger than the width D (the width including the width of the washer when necessary) D.
(3) Moreover, it attaches to a vehicle body with the above-mentioned stepped bolt.

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

  FIG. 1 shows a state where a center bearing support 1 and brackets 11 and 12 used in a mounting structure according to an embodiment of the present invention are assembled using bolts 21. 2 shows a state before the bolts 21 are screwed into the brackets 11 and 12, and an enlarged cross-sectional view taken along line C-D-E-F is shown in FIG. FIG. 4 is an enlarged single view of the bolt 21.

  In the mounting structure according to this embodiment, a center bearing support 1 having a support rubber 2 is sandwiched between a pair of upper and lower brackets 11 and 12, and the pair of brackets 11 and 12 are bolted to a vehicle body 31 (see FIG. 5). The support 1 has a mounting structure in which screw portions 11e and 12e are provided on the inner surfaces of the bolt insertion holes 11c and 12c in the brackets 11 and 12, and the center bearing support 1 is sandwiched between the pair of brackets 11 and 12 in the threaded portion. By screwing bolts 21 into 11e and 12e, the pair of brackets 11 and 12 can be assembled without being welded to each other.

  Details of each component are as follows.

  Specifically, as shown in FIG. 3, the center bearing support 1 has a rubber-like elastic support rubber 2 having an annular shape, and a metal inner ring 3 is formed on the inner peripheral side of the support rubber 2. The bearing 4 is fitted on the inner peripheral side of the inner ring 3. A propeller shaft (not shown) is inserted through the inner peripheral side of the bearing 4. The support rubber 2 includes a pair of axial outer peripheral mounting portions 2a fixed to the inner peripheral side of the brackets 11 and 12 by a retaining ring 5, an inner peripheral mounting portion 2b bonded to the inner ring 3, and both mounting portions 2a, A pair of bellows-like actuating portions 2c provided between 2b are integrally provided, and a bellows-like actuating portion is provided between the pair of bellows-like actuating portions 2c and on the outer peripheral surface of the inner peripheral mounting portion 2b. A stopper protrusion 2d is provided for restricting the amount of radial elastic deformation of the portion 2c to a certain amount.

  As shown in FIG. 2, the brackets 11 and 12 are formed of a predetermined metal and made of a pair of upper and lower pairs, respectively, front semicircular holding portions 11 a and 12 a for holding the center bearing support 1, It has flat flange-shaped attachment portions 11b and 12b provided on both sides thereof, and bolt insertion holes 11c and 12c are provided correspondingly on the flat surfaces of the attachment portions 11b and 12b. A pair of axial mounting portions 11d for fitting the outer peripheral mounting portion 2a of the support rubber 2 in the center bearing support 1 to the inner peripheral surfaces of the semicircular holding portions 11a, 12a (about the other bracket) Is not shown). Since the brackets 11 and 12 are not welded to each other, no welding site is provided.

  A series of screw portions (female screws) 11e and 12e are respectively provided on the inner surfaces of the bolt insertion holes 11c and 12c provided in the pair of brackets 11 and 12, and bolts 21 shown in FIG. Is screwed.

  Each of the bolt insertion holes 11c and 12c is formed into a long hole shape that is long in the axial direction, and the screw portions 11e and 12e are provided at substantially the center in the longitudinal direction. The screw portions 11e and 12e are provided as flat circular arcs on both inner side surfaces of the bolt insertion holes 11c and 12c, respectively, and are larger than the short width (width in the short direction) G of the bolt insertion holes 11c and 12c. It has a mountain diameter H ′ that is equal to or substantially equal to the valley diameter H and the short width G of the bolt insertion holes 11c, 12c.

  The bolt 21 shown in FIG. 4 is a stepped bolt in which a constricted portion 21c is provided between a screw portion (male screw) 21a screwed into the screw portions 11e and 12e of the brackets 11 and 12 and a head portion 21b, and the constricted portion 21c. Is set to be smaller than the effective diameter J of the screw portion 21a and the size K of the head portion 21b. Since the screw part 21a is screwed into the screw parts 11e and 12e of the brackets 11 and 12, the effective diameter J is substantially equal to the valley diameter H of the screw parts 11e and 12e of the brackets 11 and 12. The outer diameter I of the constricted portion 21c is set smaller than the short width G of the bolt insertion holes 11c and 12c, and the length L of the constricted portion 21c is set larger than the thickness M of the brackets 11 and 12. . Here, the thickness M of the brackets 11 and 12 refers to the thickness of a pair of upper and lower brackets. However, when the washer 22 (see FIG. 1) is used when the bolt 21 is screwed, the pair of upper and lower brackets. The thickness obtained by adding the thickness of the washer 22 to the thickness of two.

  The center bearing support 1 and the brackets 11 and 12 having the above configuration are assembled by the following procedure and further mounted on the vehicle body 31.

  That is, first, as shown in FIGS. 2 and 3, the center bearing support 1 is sandwiched between a pair of upper and lower brackets 11 and 12, and the bolts 21 shown in FIG. 4 are screwed into the screw portions 11e and 12e of the brackets 11 and 12, respectively. . As shown in FIG. 1, a washer 22 is used for screwing. When the bolt 21 is screwed into the screw portions 11e and 12e of the brackets 11 and 12, the bolt 21 eventually passes through the bolt insertion holes 11c and 12c and the small diameter constricted portion 21c becomes the bolt insertion holes 11c and 12c. Therefore, the pair of brackets 11 and 12 are sandwiched between the screw portion 21a and the head portion 21b of the bolt 21. Since the effective diameter J of the screw portion 21a of the bolt 21 is set to be larger than the short width G of the bolt insertion holes 11c and 12c, it does not fall off from the bolt insertion holes 11c and 12c. Therefore, the state of FIG. 1 is realized by this, and the center bearing support 1 and the pair of brackets 11 and 12 are assembled.

  The constricted portion 21c of the bolt 21 has an outer diameter I set to be smaller than the short width G of the bolt insertion holes 11c and 12c, so that the bolt 21 slides in the longitudinal direction within the bolt insertion holes 11c and 12c. It is possible to do. Therefore, when the bolt 21 is slid in the longitudinal direction in the bolt insertion holes 11c and 12c in this way, the positions of the screw portions 11e and 12e and the bolt 21 are shifted in the longitudinal direction, so that the bolt 21 is more difficult to drop off. This sliding is also performed for positioning when the vehicle body 31 is mounted.

  As described above, according to the mounting structure, since the pair of brackets 11 and 12 can be assembled without being welded to each other, the welding step between the brackets 11 and 12 can be omitted. Assembly work can be facilitated.

  Since the brackets 11 and 12 are assembled without welding as described above, the assembled product can be disassembled by removing the bolt 21 once screwed in the opposite direction. Therefore, it can be disassembled as necessary, and sufficient surface treatment can be applied to the brackets 11 and 12, or only part of the parts can be exchanged for new ones if necessary, so that the maintainability can be improved. it can.

  As shown in FIG. 5, the assembly assembled in the state of FIG. 1 is attached to the vehicle body 31 provided with the screw holes 32 using the bolts 21 as they are. Therefore, it is not necessary to separately prepare a mounting bolt for mounting, and the uselessness of the bolt can be eliminated. Further, since the mounting operation can be completed simply by screwing the bolt 21 in the state where the brackets 11 and 12 are already assembled into the vehicle body 31, the mounting operation can be facilitated.

  In the above-described embodiment, the screw portions 11e and 12e are provided on the pair of upper and lower brackets 11 and 12, respectively, but the screw portion may be provided only on one of the brackets. However, in this case, it is necessary to provide a space portion for allowing the screw portion 21a of the bolt 21 to pass through the bracket on which the screw portion is not provided.

The front view which shows the state which assembled the center bearing support and bracket used for the mounting structure based on the Example of this invention using the volt | bolt. (A) is a plan view showing a state before the bolt is screwed into the bracket, and (B) is a front view of the same. C-D-F line enlarged sectional view in FIG. Enlarged front view of the bolt Front view showing a state in which the bracket is mounted on the vehicle body using bolts Front view showing assembled and mounted state of center bearing support and bracket according to conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Center bearing support 2 Support rubber 2a Outer periphery attachment part 2b Inner periphery attachment part 2c Actuation part 2d Stopper protrusion 3 Inner ring 4 Bearing 5 Retaining ring 11,12 Bracket 11a, 12a Holding part 11b, 12b Attachment part 11c, 12c Bolt insertion hole 11d Groove mounting part 11e, 12e, 21a Screw part 21 Bolt 21b Head part 21c Constriction part 22 Washer 31 Car body 32 Screw hole

Claims (3)

A center bearing support (1) having a support rubber (2) is sandwiched between a pair of brackets (11) (12), and the brackets (11) (12) are bolted to the vehicle body (31). In the mounting structure,
Screw portions (11e) and (12e) are provided on the inner surfaces of the bolt insertion holes (11c) and (12c) in the brackets (11) and (12), and the center bearing support (1) is connected to the pair of brackets (11) and (12). Center bearing support, wherein the pair of brackets (11) and (21) are assembled without being welded to each other by screwing bolts (21) into the threaded portions (11e) and (12e) in a state of being sandwiched between Mounting structure. The center bearing support mounting structure according to claim 1,
The threaded portions (11e) (12e) have a valley diameter (H) larger than the short width (G) of the long hole-shaped bolt insertion holes (11c) (12c),
The bolt (21) has a constricted portion (21c) between a screw portion (21a) screwed into the screw portion (11e) (12e) and a head portion (21b).
The constricted portion (21c) has a diameter (I) smaller than the short width (G) of the bolt insertion holes (11c) and (12c) and a length larger than the thickness (M) of the brackets (11) and (12). (L) and a mounting structure for a center bearing support. The center bearing support mounting structure according to claim 1 or 2,
A mounting structure for a center bearing support, wherein the bolts (21) for assembling the pair of brackets (11) (12) are used as they are to mount the brackets (11) (12) to the vehicle body (31).

Images