JP5150612B2 - Suspension arm mounting structure - Google Patents

Description

  The present invention relates to a suspension arm mounting structure capable of adjusting wheel alignment.

As a suspension arm mounting structure, a structure in which a kingpin angle, a camber angle, a caster angle, a toe-in / toe-out, and the like can be adjusted is known.
This type of suspension arm mounting structure adjusts the kingpin angle, camber angle, caster angle, toe-in / toe-out, and the like by changing the suspension arm mounting position.
As such a suspension arm mounting structure, a bolt that penetrates the axis of the eccentric shaft, pivots one end side of the suspension arm to the vehicle body frame side, and fastens the eccentric shaft to the vehicle body frame side is provided, and toe adjustment (toe-in adjustment) (Toe out) is known (for example, see Patent Document 1).

  In the suspension arm mounting structure of Patent Document 1, the eccentric shaft is inserted into the suspension arm (link), and the suspension arm is attached to the bracket on the vehicle body frame side with a bolt. The hole through which the bolt of the eccentric shaft is inserted is from the center. The suspension arm is formed so as to be shifted, and the eccentric shaft is turned with the bolts loosened, so that the suspension arm can be moved in accordance with the rotation of the eccentric shaft so that the toe adjustment can be performed.

However, in the suspension arm mounting structure of Patent Document 1, the suspension arm moves along with the eccentric shaft. Therefore, when the eccentric shaft is rotated, the suspension arm moves not only in the vehicle width direction but also in the vehicle body vertical direction.
Therefore, in the suspension arm mounting structure of Patent Document 1, when adjusting the toe of the suspension arm, unintended movement in the vertical direction of the vehicle body is involved. Therefore, there is a problem that it is difficult to perform complex alignment adjustment.

Japanese Utility Model Publication No. 63-89809

  An object of the present invention is to provide a suspension arm mounting structure that can adjust the wheel alignment with high accuracy and can be arranged in a small space and has excellent layout.

  The invention according to claim 1 is a suspension arm mounting structure in which the end of the suspension arm is fastened to the vehicle body side, and the wheel alignment can be adjusted by moving the mounting position of the suspension arm. It has a bracket part facing so as to sandwich the end of the suspension arm at the time of fastening, one of the opposing bracket parts is provided with a long hole, and the other is provided with a bolt fastening part for fastening a bolt. And a shaft member that is inserted into the long hole and fastens the suspension arm to the bracket portion via a bolt, and the shaft member is provided to be movable relative to the bracket portion and the bolt. And

  The invention according to claim 2 is a substantially disk-shaped member having a hole at an eccentric position, a cam member into which the bolt is rotatably inserted, and the shaft member with respect to the bolt. It has a contact part which contacts a cam member when rotating a cam member.

The present invention has the following effects.
In the invention according to claim 1, the bracket portion is provided on the vehicle body side and opposed to sandwich the end portion of the suspension arm at the time of fastening, and one of the opposed bracket portions is provided with a long hole, and the other Is provided with a bolt fastening part for fastening a bolt, a shaft member inserted into the elongated hole and fastened to the bracket part via the bolt, and the shaft member is provided so as to be movable relative to the bracket part and the bolt. It was.
Therefore, when the bolt is loosened with the suspension arm fastened to the vehicle body side, the bolt does not move because it is fastened (screwed) to the bolt fastening portion of the bracket portion, but the shaft member moves through the long hole of the bracket portion. be able to. That is, since it can move relative to the bracket portion and the bolt, the suspension arm can be moved together by moving the shaft member, and the wheel alignment can be adjusted.
At this time, since the shaft member moves along the long hole, the movement of the shaft member can be restricted only in the longitudinal direction of the long hole, so that the alignment (for example, toe) intended in advance is accurately adjusted. be able to.
Further, since the bolt is fastened to the bolt fastening portion of the bracket portion, when the suspension arm is fastened to the vehicle body side, the bolt can be fastened only by turning the bolt head located on one side of the bracket portion. Therefore, if there is a space in which one of the brackets on the vehicle body side can turn the bolt, the wheel alignment can be adjusted. As a result, a suspension arm mounting structure with excellent layout can be realized.

The invention according to claim 2 is a substantially disk-shaped member having a hole at an eccentric position, a cam member into which the bolt is rotatably inserted, and the shaft member with respect to the bolt. Since it has a contact part which contacts a cam member when rotating a cam member, a cam member can be rotated and slid to the contact part of a cam member, and a cam member can be moved. As a result, the wheel alignment adjustment can be easily performed, and the wheel alignment can be easily finely adjusted.
In addition, even if the cam member is rotated, the shaft member moves only along the long hole of the bracket portion, and therefore, adjustment is attempted (for example, toe adjustment if the longitudinal direction of the long hole is the vehicle width direction). The influence on the alignment element can be suppressed.

1 is a perspective view of a suspension device employing a suspension arm mounting structure according to the present invention. It is a top view of the suspension apparatus shown by FIG. FIG. 2 is a rear view of the suspension device shown in FIG. 1. It is a disassembled perspective view of the suspension arm attachment structure concerning this invention. FIG. 5 is a perspective view of the suspension arm mounting structure shown in FIG. 4. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 5 is a front view of the suspension arm mounting structure shown in FIG. 4. FIG. 5 is an operation explanatory diagram of the suspension arm mounting structure shown in FIG. 4. FIG. 5 is a comparative explanatory view of the suspension arm mounting structure shown in FIG. 4.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  As shown in FIGS. 1 to 3, the suspension device 20 is a multi-link type rear suspension device in which a wheel 14 is swingably attached to a sub chassis 13 provided on the vehicle body 11 side.

  Specifically, the suspension device 20 includes an upper arm 22 that extends from the middle upper side portion of the sub chassis 13 to the knuckle 21, a front lower arm 23 that extends from the lower front side of the sub chassis 13 to the knuckle 21, A rear lower arm 24 extended from the middle lower side of the sub chassis 13 to the knuckle 21, a control arm 25 extended from the lower rear side of the sub chassis 13 to the knuckle 21, and the vehicle body 11 and the rear lower arm 24. A damper unit (shock absorber) 15 provided between them and a stabilizer 26 fixed to the rear lower arm 24 side are the main components.

  The subchassis 13 is supported on the vehicle body 11 side by four anti-vibration elastic bushings 27 (only two are shown). The wheel 14 is a left rear wheel. A wheel (not shown) of the wheel 14 is attached to the knuckle 21.

  The damper unit 15 includes a coil spring 16 that absorbs input from the wheel 14, and a damper 17 that is passed between the vehicle body 11 and the rear lower arm 24 and relaxes the movement of the coil spring 16. The coil spring 16 is arranged outside the damper 17 and coaxially.

  The upper arm 22 is fitted to the upper main body 31 having a substantially A shape, the front and rear bush fitting portions 32, 32 provided on the sub chassis 13 side of the upper main body 31, and the bush fitting portions 32, 32. Vehicle-side rubber bush joints 33 and 33 that are swingably attached to the subchassis 13 and a knuckle attachment portion 34 formed at the apex of the upper main body 31 are provided.

  The vehicle body side rubber bush joints 33, 33 are attached to the sub chassis 13 with bolts 37, 37. The knuckle attachment portion 34 is attached to the knuckle 21 with a bolt 38 via a knuckle-side rubber bush joint 35.

The front lower arm 23 includes a rod-shaped front lower body 41, a sub chassis mounting portion (not shown) provided on the sub chassis 13 side of the front lower body 41, and a knuckle provided on the knuckle 21 side of the front lower body 41. And an attachment portion 44.
The knuckle attachment portion 44 is attached to the knuckle 21 with a bolt 48 via a knuckle-side rubber bush joint 45.

  The rear lower arm 24 is a rod-shaped rear lower body 51, a bush fitting portion 52 provided on the sub chassis 13 side of the rear lower body 51, and the bush fitting portion 52, and the sub chassis 13 is shaken. A vehicle body side rubber bush joint 53 that is movably mounted, a knuckle mounting portion 54 provided on the knuckle 21 side of the rear lower body 51, and a damper coupling that is provided between the rear lower body 51 and to which the damper unit 15 is coupled. A portion 56 and a stabilizer attachment portion 56a to which the stabilizer 26 is attached are provided.

  The vehicle body side rubber bush joint 53 is attached to the sub chassis 13 with a bolt 57. The knuckle attachment portion 54 is attached to the knuckle 21 with a bolt 58 via a knuckle-side rubber bush joint 55. The damper unit 15 is attached to the damper coupling portion 56 with a bolt 59.

  The control arm 25 includes an inner arm body 61 provided on the subchassis 13 side, an outer arm body 62 provided on the knuckle 21 side, a joint portion 63 that couples the arm bodies 61 and 62, and the inner arm body 61. A bush fitting portion 65 provided on the sub chassis 13 side, a vehicle body side rubber bush joint 66 fitted to the bush fitting portion 65 and swingably and slidably provided on the sub chassis 13, and an outer arm A bush fitting portion 67 provided on the knuckle 21 side of the main body 62, and a knuckle side rubber bush joint 68 fitted to the bush fitting portion 67 and swingably attached to the lower middle portion of the knuckle 21 are provided. It is done.

  The vehicle body side rubber bush joint (end portion) 66 is attached to the sub chassis 13 so as to be swingable and alignment adjustable by a suspension arm attachment structure (alignment adjustment mechanism) 70 according to the present invention configured on the sub chassis 13 side. . The knuckle side rubber bush joint 68 is attached to the knuckle 21 with a bolt 69.

  As shown in FIGS. 4 to 7, the suspension arm mounting structure 70 has an end portion (one end) of the control arm 25 (hereinafter referred to as “suspension arm 25”) on the vehicle body 11 side (subchassis 13). In addition to the attachment, the other end of the suspension arm 25 is attached to the wheel 14, and the wheel alignment can be adjusted by moving the attachment position of the suspension arm 25.

  Here, the end (one end) of the suspension arm 25 corresponds to the vehicle body side rubber bush joint 66 of the inner arm body 61. The other end of the suspension arm 25 corresponds to the knuckle side rubber bush joint 68 of the outer arm main body 62.

  The suspension arm mounting structure 70 includes a bracket portion 71 provided on the vehicle body 11 side (subchassis 13) and facing the end portion (vehicle body side rubber bush joint) 66 of the suspension arm 25, and one of the bracket portions 71. And a shaft member 72 that is movably fitted in the wheel alignment adjustment direction and rotatably supports the end portion (vehicle body side rubber bush joint) 66 of the suspension arm 25, and the shaft member 72 is arranged in the wheel alignment adjustment direction. The moving cam member 73 includes a bolt 74 that penetrates the cam member 73 and the shaft member 72 and is screwed into the other bracket portion 71.

  That is, with the above configuration, when the bolt 74 is loosened while the suspension arm 25 is fastened to the vehicle body 11 side, the bolt 74 is fastened (screwed) to the bolt fastening portion 79 of the bracket portion 71, but does not move. The member 72 can move through the long hole 77 of the bracket portion 71.

  The bracket portion 71 is inclined at an angle θ (see FIG. 2) with respect to the longitudinal direction of the vehicle body, and faces (opposites) the one-side bracket (one) 75 formed behind the subchassis 13 and the one-side bracket 75. In addition, the other side bracket (the other side) 76 is formed on the sub chassis 13 side with respect to the one side bracket 75. Here, one side of the bracket part 71 corresponds to the one side bracket 75, and the other side of the bracket part 71 corresponds to the other side bracket 76.

The one side bracket 75 is formed with a long hole (bracket side long hole) 77 oriented in the adjustment direction, and a guide groove 78 that is formed along the long hole 77 and guides the shaft member 72 in a slidable manner. Is done.
The other bracket 76 is formed with a bolt fastening portion (female screw portion) 79 into which the bolt 74 is screwed.

  The shaft member 72 is slidably fitted into a long hole (bracket side long hole) 77, and a cylindrical body 81 that rotatably supports a vehicle body side rubber bush joint (end portion) 66 of the inner arm body 61, and this cylinder. A flange portion 82 formed on the end surface of the body 81 and guided by the guide groove 78, and a shaft member that is continuously penetrated through the flange portion 82 and the cylindrical body 81 and is formed along the guide groove 78. The side elongated hole 83 and the flange portion 82 are provided with contact portions (guide walls) 84 and 84 that are in contact with the outer periphery of the substantially disc-shaped main body portion 86 of the cam member 73.

  The cam member 73 is provided in the substantially disc-shaped main body portion 86, the main body portion 86, a hole (through hole) 87 through which the bolt 74 passes, provided in an eccentric position, and the main body portion 86. And a tool hole 88 for rotating the cam member 73.

  The shaft member 72 is slidably fitted into a long hole (bracket side long hole) 77, and a cylindrical body 81 that rotatably supports a vehicle body side rubber bush joint (end portion) 66 of the inner arm main body 61; A flange portion 82 formed on the end surface of the cylindrical body 81 and guided by the guide groove 78, and a shaft that is continuously penetrated through the flange portion 82 and the cylindrical body 81 and is formed along the guide groove 78. The member-side long hole 83 and contact portions (guide walls) 84 and 84 that are provided in the flange portion 82 and are brought into contact with the outer periphery of the substantially disk-shaped main body portion 86 of the cam member 73 are provided. In addition, the cam member 73 is provided with a substantially disc-shaped main body portion 86 and a hole (through hole) 87 provided in the main body portion 86 and provided at an eccentric position through which the bolt 74 passes. Rotate And in, it can be moved along the shaft member 72 in the long hole 77 of the bracket 71.

  Since the cam member 73 is provided with the tool hole 88 for rotating the cam member 73, the cam member 73 can be easily rotated.

  FIG. 8A shows a suspension arm mounting structure (alignment adjusting mechanism) 70 in a state in which the suspension arm 25 is shifted and set to the outside of the vehicle body. FIG. 8B shows the alignment adjusting mechanism 70 with the suspension arm 25 set at a neutral point. FIG. 8C shows the alignment adjustment mechanism 70 in a state in which the suspension arm 25 is shifted and set inside the vehicle body.

  For example, when a tool (not shown) is inserted into the tool hole 88 from the neutral state shown in FIG. 8B and the cam member 73 is rotated as indicated by an arrow a1, the outer periphery of the substantially disc-shaped cam member 73 is in contact with the outer periphery. Since the shaft member 72 is guided by the portions 84 and 84, the shaft member 72 is shifted as shown by the arrow a2, and as shown in FIG. 8A, the suspension arm 25 is set by shifting the suspension arm 25 outward by the distance S1. Is done. Naturally, the position of the bolt 74 does not move as it is.

  When a tool is inserted into the tool hole 88 from the neutral state shown in FIG. 8B and the cam member 73 is rotated as shown by the arrow c1, the outer periphery of the substantially disc-shaped cam member 73 is guided by the contact portions 84 and 84. Therefore, the shaft member 72 is shifted as shown by the arrow c2, and the suspension arm 25 is set by shifting the suspension arm 25 inwardly by the distance S1 as shown in FIG. 8C. Naturally, the position of the bolt 74 does not move as it is.

  FIG. 9A shows a suspension arm mounting structure 200 of a comparative example. In the suspension arm mounting structure 200, a bracket portion 202 is provided in the subchassis 201, a long hole 204 is formed in one bracket 203 of the bracket portion 202, and a long hole 206 is formed in the other bracket 205 of the bracket portion 202. The vehicle body side rubber bush joint 208 of the suspension arm 207 is set between the one side bracket 203 and the other side bracket 205, the bolt 211 is passed through the long holes 204, 206 and the vehicle body side rubber bush joint 208, and the bolt 211 is a washer. A nut 213 is screwed in via 212, and the suspension arm 207 is attached to the bracket portion 202 so as to be able to swing and to adjust the wheel alignment.

  When there is a space (space) in which the nut 213 can be fastened to the bolt 211 on the other bracket 205 of the bracket portion 202, the suspension arm 207 can be assembled even in the suspension arm mounting structure 200 of the comparative example.

  FIG. 9B shows a suspension arm mounting structure 70 according to the embodiment. In the sub-chassis 13 in which the suspension arm mounting structure 70 is configured, a bolt 74 is provided on the other side (the other side bracket) 76 side of the bracket portion 71, as shown in FIG. There is no space (space) to install the nut 213.

  Therefore, as shown in FIGS. 4 to 9, the suspension arm mounting structure 70 is provided on the vehicle body 11 side and faces the end portion (vehicle body side rubber bush joint) 66 of the suspension arm 25 at the time of fastening. Among the opposing bracket portions 71, one of the opposing bracket portions 71 is provided with a long hole 77, and the other 76 is provided with a bolt fastening portion 79 for fastening a bolt 74, and the bolt 74 is inserted into the long hole 77. A shaft member 72 that fastens the suspension arm 25 to the bracket portion 71 via the bracket portion 71 is provided, and the shaft member 72 is provided so as to be movable relative to the bracket portion 71 and the bolt 74.

  Accordingly, when the bolt 74 is loosened with the suspension arm 25 fastened to the vehicle body 11 side, the bolt 74 is fastened (screwed) to the bolt fastening portion 79 of the bracket portion 71, but does not move. The long hole 77 of the part 71 can be moved. That is, since it can move relative to the bracket portion 71 and the bolt 74, the suspension arm 25 can be moved together by moving the shaft member 72, and the wheel alignment can be adjusted.

  At this time, since the shaft member 72 is moved along the long hole 77, the movement of the shaft member 72 can be restricted only in the longitudinal direction of the long hole 77. It can be adjusted with high accuracy.

  Further, since the bolt 74 is fastened to the bolt fastening portion 79 of the bracket portion 71, when the suspension arm 25 is fastened to the vehicle body 11 side, the bolt head 74a of the bolt 74 located on one side 75 of the bracket portion 71 is turned. It becomes possible to conclude only by. Therefore, if there is enough space in one of the bracket portions 71 on the vehicle body 11 side to allow the bolts 74 to be turned, the wheel alignment can be adjusted. Thereby, the suspension arm attachment structure 70 excellent in layout property can be realized.

  The suspension arm mounting structure 70 is a substantially disc-shaped member having a hole 87 at an eccentric position, and a cam member 73 into which a bolt 74 is rotatably inserted. The shaft member 72 includes: Since the cam member 73 has contact portions 84 and 84 that contact the cam member 73 when the cam member 73 is rotated with respect to the bolt 74, the cam member 73 is rotated and slid on the contact portions 84 and 84 of the cam member 73. The cam member 73 can be moved. As a result, the wheel alignment adjustment can be easily performed, and the wheel alignment can be easily finely adjusted.

  Further, even if the cam member 73 is rotated, the shaft member 72 moves only along the long hole 77 of the bracket portion 71, so that adjustment is made (for example, if the longitudinal direction of the long hole 77 is the vehicle width direction, the toe is adjusted). Adjustment) The influence on alignment elements other than alignment can be suppressed.

  The suspension arm mounting structure according to the present invention is used in the suspension device 20 for attaching the rear wheel to the sub chassis 13 provided on the vehicle body 11 side as shown in FIG. Instead of this, a suspension device that supports the front wheels on the vehicle body may be used.

The suspension type is a multi-link type suspension, but is not limited to this, and other suspension types may be used.
The bracket portion 71 is inclined at an angle θ with respect to the longitudinal direction of the vehicle body, but the angle θ may be an arbitrary angle depending on the purpose of alignment.

  The suspension arm mounting structure according to the present invention is suitable for use in passenger cars such as sedans and wagons.

  DESCRIPTION OF SYMBOLS 11 ... Vehicle body, 25 ... Suspension arm, 66 ... End part (vehicle body side rubber bush joint), 70 ... Spension arm attachment structure (alignment adjustment mechanism), 71 ... Bracket part, 72 ... Shaft member, 73 ... Cam member, 74 ... Bolt, 75 ... One (one side bracket), 76 ... The other (other side bracket), 77 ... Long hole (bracket side long hole), 79 ... Bolt fastening part (female thread part), 84 ... Contact part (guide wall) .

Claims (2)

A suspension arm mounting structure in which the end of the suspension arm is fastened to the vehicle body side and the wheel alignment can be adjusted by moving the mounting position of the suspension arm.
Provided on the vehicle body side and having a bracket portion opposed so as to sandwich the end of the suspension arm at the time of fastening. One of the opposed bracket portions is provided with a long hole and the other is fastened with a bolt. Bolt fastening part is provided,
A shaft member that supports an end of the suspension arm and that is inserted into the elongated hole and fastens the suspension arm to the bracket portion via the bolt,
The suspension arm mounting structure, wherein the shaft member is provided so as to be movable relative to the bracket portion and the bolt. A substantially disc-shaped member having a hole at an eccentric position, and a cam member into which the bolt is rotatably inserted;
The suspension arm mounting structure according to claim 1, wherein the shaft member has a contact portion that comes into contact with the cam member when the cam member is rotated with respect to the bolt.

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