JP2019019934A - Vibration control mount and assembly method of the same - Google Patents

Abstract

To reduce the number of processes and thereby improve workability of assembly work when a vibration control mount is assembled to a space between a bracket and an attachment bolt.SOLUTION: A vibration control mount 1 is disposed between a bracket 63 and an attachment bolt 62 and includes: an upper bush 11 comprising a first attachment ring 12 including a cylindrical part 12a, a second attachment ring 13, and a rubber elastic body 14; a lower bush 21 comprising a third attachment ring 22 disposed below the first attachment ring 12 and including a cylindrical part 22a which cooperates with the first attachment ring 12 to allow a bolt 62 to be inserted thereinto, a fourth attachment ring 23 which is disposed below the second attachment ring 13 and sandwiches the bracket 63 with the second attachment ring 13, and a rubber elastic body 24; and a connection member 31 disposed at the inner periphery side of the cylindrical parts 12a, 22a and holding the bushes 11, 21 in a manner such that the bushes 11, 21 can slide in an axial direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an anti-vibration mount according to an anti-vibration technique and an assembling method thereof.

  In a vehicle such as an automobile, the center bearing support that holds the propeller shaft of the drive system is held by a bracket, the bracket is fastened with a mounting bolt on the vehicle body side, and the vibration is isolated between the bracket and the mounting bolt for the purpose of vibration isolation. The mount is assembled.

  As shown in FIG. 3, a conventional anti-vibration mount 51 having an upper bush 52, a lower bush 53, a sleeve 54 and a chrysanthemum washer 55 is known, and the anti-vibration mount 51 is assembled in the following procedure. .

  That is, the upper bush 52 other than the lower bush 53 among the components of the vibration-proof mount 51, the sleeve 54, and the chrysanthemum washer 55 are attached to the outer periphery of the mounting bolt 62 in a state of projecting downward from the vehicle body side 61. Temporarily fix with a chrysanthemum washer 55.

  Next, as shown in the drawing, the lower bush 53 is attached while the bracket 63 is sandwiched between the upper bush 52 and the bolt 62 is tightened by screwing the nut 64 to the bolt 62 and the vibration-proof mount 51 is then attached to the bolt 62. Compress in the axial direction.

  Note that a mounting portion 65 including a mounting bolt 62 and a notch for mounting the anti-vibration mount 51 is provided on the plane of the bracket 63 in advance.

Japanese Utility Model Publication No. 5-65640

  However, the prior art has room for improvement in the following points.

  That is, in the above-described prior art, as described above, the procedure for assembling the vibration-proof mount 51 between the bracket 63 and the mounting bolt 62 is that the upper bush 52 other than the lower bush 53, the sleeve 54 and the chrysanthemum washer 55 are attached to the outer periphery of the mounting bolt 62. The process includes four steps, that is, a step of attaching, a step of assembling the bracket 63, a step of attaching the lower bush 53, and a step of tightening the bolt 62. Even if the upper bushing 52 and the sleeve 54 are temporarily fixed to the outer periphery of the mounting bolt 62 by the chrysanthemum type washer 55, the lower bushing 53 cannot be temporarily fixed and needs to be retrofitted. Therefore, the number of assembly steps is large, and there is an inconvenience that the assembly is troublesome.

  The present invention provides an anti-vibration mount that can reduce the number of steps when assembling the anti-vibration mount between the bracket and the mounting bolt, and can improve the workability of the assembling work, and an assembling method thereof. This is the issue.

  In order to solve the above problems, the vibration isolating mount of the present invention is a vibration isolating mount interposed between a bracket for holding a center bearing support and a mounting bolt for mounting the bracket on the vehicle body side. A first mounting ring having a cylindrical portion through which the bracket is inserted, a second mounting ring sandwiching the bracket, an upper bush made of a rubber-like elastic body interposed between the first and second mounting rings, and the first mounting A third mounting ring having a cylindrical portion that is disposed on the lower side of the ring and through which the mounting bolt is inserted together with the first mounting ring, and that is disposed on the lower side of the second mounting ring and sandwiches the bracket with the second mounting ring. A lower bushing made of a rubber-like elastic body interposed between the fourth mounting ring and the third and fourth mounting rings, and disposed on the inner peripheral side of the both cylindrical parts, And having a connecting member for holding axially slidably Re respectively, the.

  An anti-vibration mount assembling method of the present invention is a method of assembling the anti-vibration mount described above between the bracket and the mounting bolt, the temporary assembly step of attaching the anti-vibration mount to the bracket, A main assembly process in which mounting bolts are inserted and tightened on the inner peripheral sides of the two cylindrical portions, and the connection is performed in the temporary assembly step so that the cylindrical portions are separated from each other in the axial direction. A member holds both the bushes, and then, when the mounting bolt is tightened in the main assembling step, the cylindrical portions slide in a direction approaching each other by a bolt tightening force.

  In the present invention, the procedure for assembling the vibration-proof mount between the bracket and the mounting bolt includes a temporary assembly process for mounting the vibration-proof mount on the bracket, and a main assembly process for inserting and tightening the mounting bolt to the inner peripheral side of both cylindrical portions. Even if this assembly process is divided into two parts, a bolt insertion process and a bolt tightening process, it is counted as three processes. All components of the anti-vibration mount are attached to the bracket in a temporary assembly process. Therefore, when assembling the vibration-proof mount between the bracket and the mounting bolt, the number of processes can be reduced, and the workability of the assembling work can be improved.

Sectional drawing which shows the state which completed the temporary assembly process which attaches the vibration proof mount which concerns on embodiment to a bracket Sectional drawing which shows the state which complete | finished this assembly process which inserts and tightens a mounting bolt to the inner peripheral side of the vibration-proof mount Cross-sectional view of anti-vibration mount according to background art

  FIG. 1 shows a state in which the provisional assembly process for attaching the vibration isolating mount 1 according to the embodiment to the bracket 63 is completed, and FIG. 2 shows a book in which the mounting bolt 62 is inserted and tightened on the inner peripheral side of the vibration isolating mount 1. The state which completed the assembly process is shown.

  As shown in FIG. 2, the vibration-proof mount 1 is interposed between a bracket 63 that holds a center bearing support and a mounting bolt 62 that attaches the bracket 63 to the vehicle body side 61, and vibrations that occur when the propeller shaft rotates. The function of insulating the vehicle body 61 from the vehicle body side is exhibited.

  The anti-vibration mount 1 has an upper bush 11, a lower bush 21 and a connecting member 31.

  The upper bush 11 includes a first mounting ring 12 having a flange portion 12b integrally formed on the outer periphery of one end of the cylindrical portion 12a through which the mounting bolt 62 is inserted, and a flat plate-shaped second mounting sandwiching the bracket 63. It has a ring 13 and an annular rubber-like elastic body 14 that is vulcanized and bonded to both mounting rings 12 and 13 and interposed between both mounting rings 12 and 13.

  The lower bush 21 is disposed below the first mounting ring 12 of the upper bush 11, and a flange portion 22 b is integrally formed on the outer periphery of one end of a cylindrical portion 22 a through which the mounting bolt 62 is inserted together with the first mounting ring 12. A third mounting ring 22 having a substantially L-shaped cross section, a flat fourth mounting ring 23 disposed below the second mounting ring 13 of the upper bush 11 and sandwiching the bracket 63 together with the second mounting ring 13; And an annular rubber-like elastic body 24 interposed between the attachment rings 22 and 23 by being vulcanized and bonded to the attachment rings 22 and 23.

  Since the upper bush 11 and the lower bush 21 have a vertically symmetrical structure as shown in the figure, it is possible to share the same standard bush.

  The connecting member 31 is formed in a cylindrical shape from a rigid material such as metal. The connecting member 31 is disposed on the inner peripheral side of the cylindrical portion 12a of the first mounting ring 12 in the upper bush 11 and on the inner peripheral side of the cylindrical portion 22a of the third mounting ring 22 in the lower bush 21. It is loosely fitted to both cylindrical portions 12a and 22a, and exerts an action of holding both bushes 11 and 21 slidably in the axial direction. Therefore, since the upper bush 11 and the lower bush 21 are connected to each other via the connecting member 31, all the components of the vibration isolating mount 1 are connected and integrated at the temporary fixing stage.

  Note that a mounting portion 65 including a mounting bolt 62 and a notch for mounting the vibration isolating mount 1 is provided on the plane of the bracket 63 in advance.

  When the anti-vibration mount 1 having the above configuration is assembled between the bracket 63 and the mounting bolt 62, first, as shown in FIG. 1, a temporary assembly process for attaching the anti-vibration mount 1 to the bracket 63 is performed. The bushes 11 and 21 are held by the connecting member 31 so that the cylindrical portions 12a and 22a of the first and third attachment rings 12 and 22 are separated from each other in the axial direction. In the figure, an interval due to the separation is indicated by a symbol L.

  Next, as shown in FIG. 2, the main assembly step of tightening the mounting bolt 62 that precedes the vehicle body side 61 and protrudes downward from the vehicle body side 61 relative to the inner peripheral side of both the cylindrical portions 12 a and 22 a. In this assembling step, when the mounting bolt 62 is tightened against the nut 64, the cylindrical portions 12a, 22a of the first and third mounting rings 12, 22 are brought closer to each other by the bolt tightening force. At this point, the bolts 62 are tightened. Accordingly, the interval L disappears, and the rubber-like elastic bodies 14 and 24 are in a compressed state.

  As described above, according to the assembling method, the assembling work is divided into two steps including the temporary assembling step and the main assembling step, and the main assembling step is divided into two steps, that is, a bolt insertion step and a bolt tightening step. Even so, there are three steps. All components of the vibration-proof mount 1 are attached to the bracket 63 in a temporary assembly process. Therefore, when the vibration isolating mount 1 is assembled between the bracket 63 and the mounting bolt 62, the number of steps can be reduced, and the workability of the assembling work can be improved.

DESCRIPTION OF SYMBOLS 1 Anti-vibration mount 11 Upper bush 12 1st attachment ring 12a, 22a Tubular part 12b, 22b Flange part 13 2nd attachment ring 14, 24 Rubber-like elastic body 21 Lower bushing 22 3rd attachment ring 23 4th attachment ring 31 Connection Member 61 Car body side 62 Mounting bolt 63 Bracket 64 Nut 65 Mounting part L Interval

Claims (2)

An anti-vibration mount interposed between a bracket for holding a center bearing support and a mounting bolt for attaching the bracket to the vehicle body side,
A first mounting ring having a cylindrical portion through which the mounting bolt is inserted, a second mounting ring sandwiching the bracket, and an upper bush made of a rubber-like elastic body interposed between the first and second mounting rings;
A third mounting ring that is disposed on the lower side of the first mounting ring and includes a cylindrical portion that passes through the mounting bolt together with the first mounting ring, and that is disposed on the lower side of the second mounting ring together with the second mounting ring. A lower bushing made of a rubber-like elastic body interposed between the third mounting ring and the fourth mounting ring sandwiching the bracket;
A vibration isolating mount comprising: a connecting member disposed on an inner peripheral side of the both cylindrical portions, and holding the bushes so as to be axially slidable. A method of assembling the vibration-proof mount according to claim 1 between the bracket and the mounting bolt,
A temporary assembly step of attaching the vibration-proof mount to the bracket, and a main assembly step of inserting and tightening the mounting bolts to the inner peripheral sides of the cylindrical portions are sequentially performed,
In the temporary assembly step, the connecting member holds the bushes so that the cylindrical portions are separated from each other in the axial direction;
Thereafter, when the mounting bolt is tightened in the assembling step, the cylindrical portion slides in a direction in which both the cylindrical portions approach each other by a bolt tightening force.

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