JP2013177924A - Bracket and vibration-isolating connecting rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance durability of a vibration-isolating connecting rod in which a holding part for holding a first vibration-isolating bushing and a member for holding a second vibration-isolating bushing are welded and fixed, while suppressing manufacturing cost.SOLUTION: A rod comprises a cylindrical holding part 42 holding a first vibration-isolating bushing 20, a flange part 44 extending radially outward from an outer peripheral surface of the holding part 42, a connecting member 50 keeping the holding part 42 at one end and a second vibration-isolating bushing 30 at the other end. The connecting member 50 extends in a direction of separating from the holding part 42 and contains a pair of connecting parts 51 provided at intervals in an axial direction of the second vibration-isolating bushing 30. The pair of connecting parts 51 are welded and fixed to the flange part 44.

Description

  The present invention relates to an anti-vibration connecting rod that can be used, for example, as a torque rod for connecting an automobile engine to a vehicle body while isolating vibrations, and a bracket that holds an anti-vibration bush in the anti-vibration coupling rod.

  An anti-vibration connecting rod called a torque rod is provided between an automobile body and an engine which is a vibration generation source in order to suppress movement and vibration in the roll direction of the engine.

  As such an anti-vibration connecting rod 100, for example, as shown in FIG. 4, a first anti-vibration bush 101 connected to one of the engine and the vehicle body, and a second anti-vibration bush connected to either the engine or the vehicle body. A vibration holding bush 102, and a bracket 103 that holds the first vibration isolation bush 101 and the second vibration isolation bush 102. The bracket 103 has a cylindrical holding portion 104 that holds the first vibration isolation bush 101 at one end. Further, there is known one provided with a pair of connecting portions 105 that are fixed to the outer peripheral surface of the holding portion 104 and hold the second vibration-proof bushing 102 at the other end (see Patent Document 1 below).

JP 2006-194370 A

  In the bracket 103 of the anti-vibration connecting rod 100 as described above, in order to fix the connecting portion 105 to the holding portion 104, a bent portion 105a that bends along the outer peripheral surface of the holding portion 104 is provided at one end of the connecting portion 105. In the vicinity of the bent portion 105a, the connecting portion 105 and the holding portion 104 are fixed by welding. Therefore, when vibration is input to the anti-vibration connecting rod 100 and the holding portion 104 that holds the first anti-vibration bush 101 is deformed, distortion is likely to concentrate on the welded portion 106, and the welded portion 106 is easily damaged. .

  Further, in the vibration-proof connecting rod 100 as described above, in order to increase the rigidity of the pair of connecting portions 105, the pair of connecting portions 105 and the reinforcing portion 107 that connects them are integrally formed by bending a single metal plate. However, in such a case, there is a problem that the manufacturing cost of the anti-vibration connecting rod 100 is increased because a metal plate punching loss is likely to occur.

  The present invention has been made in view of the above points, and in the vibration-isolating connecting rod for welding and fixing the holding portion for holding the first vibration-proof bushing and the member for holding the second vibration-proof bushing, the manufacturing cost is improved. An object of the present invention is to provide a vibration-isolating connecting rod that can improve durability while suppressing the vibration, and a bracket that holds the first vibration-isolating bush and the second vibration-isolating bush.

  The bracket according to the present invention includes a cylindrical holding portion for holding the first vibration isolating bush, a flange portion extending radially outward from the outer peripheral surface of the holding portion, and the holding portion fixed to one end. A connecting member for holding the second vibration isolating bush at an end, the connecting member extending along a direction away from the holding portion, and provided at an interval in the axial direction of the second anti-vibration bush. A pair of connecting portions, wherein the pair of connecting portions are fixed to the flange portion by welding.

  In the bracket of the present invention described above, the holding portion and the flange portion may be integrally formed by drawing.

  Furthermore, in the bracket according to the present invention, the connecting member is provided around the outer peripheral surface of the holding portion from the connecting portion to the outer peripheral surface of the holding portion opposite to the connecting portion. The peripheral portion may be welded and fixed to an outer peripheral surface portion of the holding portion opposite to the connecting portion.

  An anti-vibration connecting rod according to the present invention includes a first anti-vibration bush, a second anti-vibration bush, a cylindrical holding portion for holding the first anti-vibration bush, and a radially outer side from the outer peripheral surface of the holding portion. And a connecting member to which the holding portion is fixed at one end and the second vibration-proof bushing is fixed to the other end, and the connecting member extends along a direction away from the holding portion. It has a pair of connecting portions that extend and are spaced from each other in the axial direction of the second vibration-proof bushing, and the pair of connecting portions are welded and fixed to the flange portion.

  According to the present invention, it is difficult for strain to concentrate on the weld fixing portion, and the durability of the vibration-isolating connecting rod can be improved.

It is a fragmentary sectional view of the vibration isolating connecting rod which concerns on one Embodiment of this invention. It is a fragmentary sectional view of the anti-vibration coupling rod shown in FIG. It is a perspective view of the bracket of the vibration isolating connecting rod shown in FIG. It is a top view of the vibration isolating connecting rod which concerns on a prior art example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The anti-vibration connecting rod 10 of this embodiment is a torque rod that is assembled between a vehicle body of an automobile and an engine that is a vibration generation source, and suppresses movement and vibration in the roll direction of the engine.

  As shown in FIGS. 1 and 2, the vibration isolating connecting rod 10 includes a first vibration isolating bush 20 connected to one of the engine and the vehicle body, for example, the vehicle body side, and one of the engine and the vehicle body, for example, A second anti-vibration bush 30 connected to the engine side, and a bracket 40 that holds the first anti-vibration bush 20 and the second anti-vibration bush 30 are provided.

  The first anti-vibration bush 20 includes a cylindrical first outer cylinder 21, a first inner cylinder 22 that is axially parallel and coaxially arranged in the first outer cylinder 21, the first outer cylinder 21, and the first inner cylinder 21. It comprises a first rubber-like elastic body 23 made of a rubber elastic body interposed between the cylinders 22. In this embodiment, the first inner cylinder 22 is connected to the vehicle body side via a bolt (not shown). Fixed.

  The second anti-vibration bush 30 includes a cylindrical second outer cylinder 31, a second inner cylinder 32 disposed in an axially parallel and coaxial manner in the second outer cylinder 31, and the second outer cylinder 31 and the second inner cylinder 30. It is comprised from the 2nd rubber-like elastic body 33 which consists of a rubber elastic body interposed between the pipe | tubes 32. FIG. In the present embodiment, the second vibration isolating bush 30 is connected to the engine side bracket 35 in which the second inner cylinder 32 is connected and fixed to the bracket 40 via the bolt 41 and the second outer cylinder 31 is fixed to the engine side. By being press-fitted into the provided cylindrical portion 36, it is connected and fixed to the vehicle body side.

  As shown in FIG. 3, the bracket 40 includes a holding portion 42 that holds the first anti-vibration bush 20, a flange portion 44 provided on the holding portion 42, and the holding portion provided at one end and the other end thereof. And a connecting member 50 on which the second vibration isolating bush 30 is held.

  Specifically, the holding portion 42 has a cylindrical shape, and the first outer cylinder 21 of the first vibration isolation bush 20 is press-fitted inside to hold the first vibration isolation bush 20. A flange portion 44 that protrudes radially outward from the outer peripheral surface is provided at one axial end portion of the holding portion 42.

  The flange portion 44 is provided on the entire circumference of the cylindrical holding portion 42, and a part of the flange portion 44 forms a flange protrusion 46 that protrudes from the other portion toward the second vibration isolating bush 30.

  In this embodiment, the flange portion 44 including the flange protrusion 46 is integrally formed with the cylindrical holding portion 42 by drawing (burring) one metal plate. When the holding portion 42 and the flange portion 44 are integrally provided by drawing as described above, as shown in FIG. 2, an opening end is formed on the inner peripheral surface of one end portion of the holding portion 42 provided with the flange portion 44. A taper portion 48 that gradually expands toward is formed.

  The connecting member 50 is connected to a pair of connecting portions 51 provided facing each other with an interval in the axial direction of the second vibration isolating bush 30, that is, the axial direction of the second outer cylinder 31 and the second inner cylinder 32. The connecting portion 51 and the peripheral portion 52 are integrally formed by pressing an elongated metal plate.

  Reference numeral 55 denotes a reinforcing rib provided across the connecting portion 51 and the peripheral portion 52 constituting the connecting member 50, and the reinforcing rib 55 is formed by breath processing for forming the connecting portion 51 and the peripheral portion 52. Formed simultaneously.

  Specifically, the pair of connecting portions 51 is substantially linear in a plan view when viewed from the axial direction of the first vibration isolating bush 20, and one end portion is connected to the flange protrusion 46 of the flange portion 44 with the welded portion 54. And is provided so as to extend in a direction away from the holding portion 42.

  One end portion of the pair of connecting portions 51 welded and fixed to the flange protrusion 46 by the welded portion 54 bends outward (that is, a direction in which the opposing connecting portions 51 are separated from each other) on the holding portion 42 side from the welded portion 54. A circumferential portion 52 that is curved along the outer peripheral surface of the cylindrical holding portion 42 is integrally provided. The peripheral portion 52 is provided up to the outer peripheral surface portion on the opposite side of the connecting portion 51 in the holding portion 42 and covers almost the entire circumference of the holding portion 42, and the tip end portion is held via the peripheral surface welding portion 57. The outer peripheral surface of the portion 42 is fixed by welding.

  The other end of the pair of connecting portions 51 is formed with a bolt hole 53 through which a bolt 41 for fixing the second vibration isolating bush 30 is inserted, and is screwed into one connecting portion 51 with the bolt 41. A nut 56 is fixed. Then, the bolt 41 is inserted into the bolt hole 53 and the hollow portion of the second inner cylinder 32 in a state where the second inner cylinder 32 of the second vibration isolating bush 30 is sandwiched between the pair of connecting portions 51 and screwed into the nut 56. Thus, the second vibration isolating bush 30 is held at the other end of the pair of connecting portions 51.

  In the anti-vibration connecting rod 10 of the present embodiment as described above, the bracket 40 of the anti-vibration connecting rod 10 has a pair of connecting portions 51 that hold the second anti-vibration bush 30 in the connecting member 50, and the first anti-vibration bushing. 20 is fixed by welding to a flange protrusion 46 of a flange portion 44 that protrudes radially outward from a holding portion 42 that holds 20 and forms a plane parallel to a direction in which the connecting portion 51 extends. 50, the holding portion 42 and the connecting member 50 are fixed by welding while avoiding a portion that bends outward along the holding portion 42. As a result, even if a vibration is input to the vibration-isolating connecting rod 10 and a distortion occurs due to the deformation of the holding portion 42 that holds the first vibration-isolating bush 20, the distortion is less likely to concentrate on the welded portion 54, and the bracket 40 is durable. Can greatly improve the performance.

  In the present embodiment, since the holding portion 42 and the flange portion 44 are integrally formed by drawing, the cylindrical holding portion 42 can be easily made highly rigid and the durability of the bracket 40 is improved. In addition, a tapered portion 48 that gradually expands toward the opening end can be formed at one end portion of the holding portion 42, so that the first vibration isolating bush 20 can be easily press-fitted into the holding portion 42.

  Further, in this embodiment, since the peripheral portion 52 provided integrally from the connecting portion 51 covers the outer peripheral surface of the holding portion 42, the rigidity of the holding portion 42 can be increased, and the durability of the bracket 40 can be increased. Can be improved.

  In addition, in the present embodiment, the flange protrusions 46 of the flange portion 44 can connect and reinforce the pair of connecting portions 51, and therefore, the reinforcing portion that connects these to the pair of connecting portions 51 is made of a single metal plate. It is not necessary to integrally form by bending, and the shape of the connecting member 50 before bending, that is, the punching shape of the metal plate can be simplified and the punching loss of the metal plate can be suppressed, and the manufacturing cost of the vibration-proof connecting rod 10 can be reduced. be able to.

  Furthermore, in this embodiment, since a pair of connection part 51 which comprises the connection member 50 can be divided | segmented and comprised in two members, in order to hold | maintain the 2nd vibration isolating bush 30, one connection part 51 is provided. After positioning the bolt holes 53 provided in each, the connecting member 50 can be welded and fixed to the flange portion 44 and the holding portion 42, and the bolt holes 53 can be easily and accurately aligned with the opposing positions. .

DESCRIPTION OF SYMBOLS 10 ... Anti-vibration connecting rod 20 ... 1st anti-vibration bush 21 ... 1st outer cylinder 22 ... 1st inner cylinder 23 ... 1st rubber-like elastic body 30 ... 2nd anti-vibration bush 31 ... 2nd outer cylinder 32 ... 2nd Inner cylinder 33 ... second rubber-like elastic body 35 ... engine side bracket 36 ... cylinder part 40 ... bracket 41 ... bolt 42 ... holding part 44 ... flange part 46 ... flange projection 48 ... taper part 50 ... connecting member 51 ... connecting part 52 ... Circumferential portion 53 ... Bolt hole 54 ... Welding portion 55 ... Reinforcement rib 56 ... Nut 57 ... Circumferential weld

Claims (4)

A cylindrical holding portion for holding the first vibration isolating bush, a flange portion extending radially outward from the outer peripheral surface of the holding portion, and the holding portion provided at one end and the second vibration isolating at the other end. A connecting member for holding the bush,
The connecting member includes a pair of connecting portions extending in a direction away from the holding portion and spaced apart in the axial direction of the second vibration-proof bushing, and the pair of connecting portions are welded to the flange portion. A bracket characterized by being fixed.   The bracket according to claim 1, wherein the holding portion and the flange portion are integrally formed by drawing. The connecting member includes a peripheral portion provided from the connecting portion along the outer peripheral surface of the holding portion to an outer peripheral surface portion of the holding portion opposite to the connecting portion,
The bracket according to claim 1 or 2, wherein the peripheral portion is welded and fixed to an outer peripheral surface portion of the holding portion opposite to the connecting portion. A first anti-vibration bush, a second anti-vibration bush, a cylindrical holding portion for holding the first anti-vibration bush, a flange portion extending radially outward from an outer peripheral surface of the holding portion, and one end portion A connecting member provided with the holding portion and having the second vibration-proof bushing held at the other end;
The connecting member includes a pair of connecting portions extending in a direction away from the holding portion and spaced apart in the axial direction of the second vibration-proof bushing, and the pair of connecting portions are welded to the flange portion. Anti-vibration connecting rod, which is fixed.

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