JP2009029153A - Suspension device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect a welded structure part from chipping in a suspension device for a vehicle adopting an arm provided with the welded structure part at a distal end. <P>SOLUTION: In the suspension device 10 for the vehicle, a plurality of arms 14, 27-29 are pivotably extended from a vehicle body side and knuckles 13 for mounting wheels 12 are freely swingably supported on distal ends of the arms 14, 27-29. The welded structure parts 37, 47, 57 are provided on distal ends of the arms 27-29 of the plurality of arms, and are hidden at the inside of a tire 19 of the wheel 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle suspension device that relaxes input from a road surface by moving a wheel up and down and ensures vehicle stability (stability).

Among vehicle suspension apparatuses, suspension apparatuses such as a double wishbone type and a multi-link type are known.
In this type of vehicle suspension device, the suspension is generally adopted with a design change according to the application.

As such a vehicle suspension device, a double wishbone suspension device that supports front wheels and a multi-link suspension device that supports rear wheels are known (see, for example, Patent Documents 1 and 2).
JP-A-8-156548 (page 5, FIG. 2) Japanese Patent Laying-Open No. 2005-225382 (page 15, FIG. 2)

An outline of the technique of Patent Document 1 will be described with reference to FIG.
FIG. 6 is a diagram for explaining a conventional double wishbone type vehicle suspension apparatus.
The vehicle suspension apparatus 200 includes a steering knuckle 202 to which a front wheel (tire) 201 is attached, an upper arm 204 that supports an upper portion of the steering knuckle 202, and an upper arm 204 that supports an upper portion of the steering knuckle 202, and a steering knuckle. The lower arm 205 that supports the lower portion of the body 202, and the shock absorber (damper unit) 206 that is passed to the steering knuckle 202 side of the vehicle body frame 203 and the upper arm 204 and relieves input from the road surface.

  The upper arm 204 has an upper connection portion 207 connected to the steering knuckle 202, and the lower arm 205 has a lower connection portion 208 connected to the steering knuckle 202.

An outline of the technique of Patent Document 2 will be described with reference to FIG.
FIG. 7 is a diagram for explaining a conventional multi-link type vehicle suspension apparatus.
The vehicle suspension apparatus 210 includes a knuckle 212 for attaching a rear wheel 211, an upper arm (first lateral arm) 213 that extends outward from the vehicle body frame (not shown) and supports the upper portion of the knuckle 212, and a vehicle body. A lower arm (second lateral arm) 214 that extends outward from the frame and supports the lower part of the knuckle 212, and an intermediate height between the upper arm 213 and the lower arm 214, outward from the vehicle body width. A control arm (third lateral arm) 215 that extends and supports the knuckle 212; a body arm that extends forward from the body frame; a leading arm 216 that supports the knuckle 212; And a trailing arm 217 that supports the knuckle 212.

  The leading arm 216 is an arm having welded structures 222 and 223 including a rod 218, a joint 219 welded to the body frame side of the rod 218, and a joint 221 welded to the knuckle 212 side of the rod 218. The other arms are also arms having the same welded structure.

  As shown in FIG. 6, in the vehicle suspension apparatus 200, the upper connecting portion 207 connected to the steering knuckle 202 is located inward from the inner surface of the tire 201. Therefore, there is a high possibility that a pebble or the like will hit the vehicle while traveling (chipping is likely to occur). Hereinafter, a phenomenon in which pebbles or the like hit during traveling is referred to as chipping.

As shown in FIG. 7, in the vehicle suspension apparatus 210, the arm 216 has welded structures 222 and 223. In general, the welded portion is a portion that is inferior in corrosion resistance of coating or plating as compared with other portions.
Therefore, in the vehicle suspension apparatus 210 that employs the arm 216 having the welded structure portions 222 and 223, the welded structure portions 222 and 223 are not located at a portion where chipping is likely to occur as shown in FIG. Further, the corrosion resistance of the arm 216 is further deteriorated.

  An object of the present invention is to provide a vehicle suspension device that can protect a welded structure portion from chipping and the like in a vehicle suspension device that employs an arm provided with a welded structure portion at a tip.

  According to the first aspect of the present invention, there is provided a vehicle suspension apparatus in which a plurality of arms are swingably extended from the vehicle body side, and a knuckle for attaching a wheel to the tip of these arms is swingably supported. A welded structure is provided at the tip of the wheel, and the welded structure is hidden inside the tire of the wheel.

  In the invention according to claim 2, the plurality of arms has one upper arm that has an A shape disposed upward from the center of the wheel, and three that has an I shape that is disposed downward from the center of the wheel. It is composed of a lower arm.

  The invention according to claim 3 is characterized in that the lower arm is an arm having a welded structure part at least on the knuckle side, and the welded structure parts of all the lower arms are hidden in the tire.

  In the invention according to the first aspect, the knuckle is swingably supported by the plurality of arms on the vehicle body side. The plurality of arms are arms provided with a welded structure at the tip, and are arranged so that the welded structure is hidden inside the tire of the wheel. That is, since the welded structure is hidden inside the tire of the wheel, the possibility that a pebble or the like that is flipped up by the tire will hit the welded structure is reduced. As a result, the welded structure is protected from chipping and the like.

  In the invention according to claim 2, the plurality of arms has one upper arm that has an A shape disposed upward from the center of the wheel, and three that has an I shape that is disposed downward from the center of the wheel. It consists of a lower arm. In general, the arms constituting the welded structure are three lower arms having an I-shape, and it is only necessary to consider that the welded structure of the three lower arms is stored inside the tire. Increases design freedom.

  In the invention which concerns on Claim 3, the arm which has a welded structure part can be uniformly protected from chipping etc. by arrange | positioning so that the welded structure part of all the lower arms may be hidden in a tire.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
1 is a perspective view of a vehicle suspension apparatus according to the present invention, FIG. 2 is a side view of the vehicle suspension apparatus shown in FIG. 1, and FIG. 3 is a plan view of the vehicle suspension apparatus shown in FIG. FIG. 4 is a rear view of the vehicle suspension apparatus shown in FIG.

  As shown in FIGS. 1 to 4, the vehicle suspension apparatus 10 is a rear suspension of a right rear wheel (wheel) 12, a knuckle 13 to which the wheel 12 is rotatably mounted, and a vehicle body width from the vehicle body side. An upper arm 14 that extends outward and supports the upper part of the knuckle 13, a lower arm group 15 that extends outward from the vehicle body width and supports the lower part of the knuckle 13, and an upper part of the vehicle body and the knuckle 13 It is composed of a damper unit (shock absorber) 16 that buffers the shock that is passed from the wheel 12 and a stabilizer 17 that is passed over the vehicle body and the knuckle 13 to stabilize the vehicle body.

  The wheel 12 includes a wheel (not shown) attached to the knuckle 13 and a tire 19 attached to the wheel.

The upper arm 14 is a substantially A-shaped arm, is formed at the lower end of the substantially A-type, and is formed at the front and rear body side rubber bush joints 21 and 21 that are swingably connected to the vehicle body, and at the apex of the substantially A-type. The knuckle-side rubber bush joint 22 that swingably supports the upper portion of the knuckle 13 and an opening 23 that is formed in a substantially A-shaped hollow portion and through which the damper unit 16 passes.
The front and rear vehicle body side rubber bush joints 21 and 21 are attached to the vehicle body by bolts 24 and 24, respectively.

  The lower arm group 15 extends from the vehicle body to the outside of the vehicle body width, and includes a first lower arm (lateral rod) 27 that supports the height position of the axle (the center of the wheel 12) 26 at the front end of the knuckle 13, and from the vehicle body to the vehicle body. A second lower arm (lateral rod) 28 that extends outward in the width direction and near the center of the knuckle 13 and supports the lower position of the axle 26, and extends from the vehicle body outward in the vehicle width, and at the rear end of the knuckle 13 The third lower arm (lateral rod) 29 supports the lower position of the axle.

  The first to third lower arms 27 to 29 are substantially I-shaped arms joined by welding, and are arranged in order of the first lower arm 27, the second lower arm 28, and the third lower arm 29 from the vehicle body front side (front part). The The first to third lower arms 27 to 29 extend in the left-right direction (vehicle body width direction).

  The first lower arm (arm) 27 is welded to an I-shaped arm portion (rod) 31 and one end of the arm portion 31 and supported on the vehicle body side via a first rubber bush (rubber bush joint) 32. It comprises a vehicle body side annular portion 33 and a knuckle side annular portion 35 which is welded to the other end of the arm portion 31 and attached to the knuckle 13 side via a second rubber bush (rubber bush joint) 34.

That is, the first lower arm 27 has a welding structure portion 36 at one end of the arm portion 31 and a welding structure portion 37 at the other end of the arm portion 31. Further, the first lateral rod (arm) 27 is connected to the front side of the knuckle 13.
The first rubber bush 32 is attached to the vehicle body with bolts 38, and the second rubber bush 34 is attached to the knuckle 13 with bolts 39.

The first and second rubber bushes 32 and 34 are obtained by giving a predetermined inclination angle to the center lines of the first and second rubber bushes 32 and 34 when viewed from the axial direction of the arm portion 31. is there.
Preferably, the inclination angle between the center lines is set to 5 to 20 °.

  The second lower arm 28 is welded to the rod 41, one end of the rod 41, the vehicle body side annular portion 43 supported on the vehicle body side via the rubber bush joint 42, and the other end of the rod 41, and the knuckle 13 The knuckle side joint part 45 is attached to the side through a rubber bush joint 44.

That is, the second lower arm 28 has a welded structure 46 at one end of the rod 41 and a welded structure 47 at the other end of the rod 41.
The rubber bush joint 42 is attached to the vehicle body with a bolt 48, and the knuckle side joint portion 45 is attached to the knuckle 13 with a bolt 49.

  The third lower arm 29 is welded to the rod 51, one end of the rod 51, the vehicle body side annular portion 53 supported on the vehicle body side via the rubber bush joint 52, and the other end of the rod 51, and the knuckle 13 The knuckle side joint part 55 is attached to the side through a rubber bush joint 54.

That is, the third lower arm 29 has a welded structure 56 at one end of the rod 51 and a welded structure 57 at the other end of the rod 51.
The rubber bush joint 52 is attached to the vehicle body with a bolt 58, and the knuckle side joint portion 55 is attached to the knuckle 13 with a bolt 59.

  As shown in FIG. 4, the welded structures 37, 47, and 57 on the knuckle 13 side of the first to third lower arms 27 to 29 are in a position accommodated in the tire 19.

The damper unit 16 absorbs input from the tire 19 (reducing the shock of the vehicle body) 61 and a damper 62 that is passed between the vehicle body and the knuckle 13 and relaxes the movement of the coil spring 61. Consists of.
The coil spring 61 is arranged outside the damper 62 and coaxially.

The knuckle 13 is formed on a wheel mounting portion 71 for attaching a wheel (not shown), an upper arm support portion 72 formed on the upper portion of the axle 26 and supported by the upper arm 14, and formed on the front side (front side) of the axle 26. A first lower arm support portion 73 supported by the lower arm 27, a second lower arm support portion 74 formed at the lower portion of the axle 26 and supported by the second lower arm 28, and a rear lower portion of the axle 26, and a third lower arm 29, a third lower arm support portion 75 supported at 29, a damper unit connecting portion 76 formed at the upper portion of the axle 26, to which the damper unit 16 is connected, and an upper rear portion of the axle 26, to which the stabilizer 17 is connected. And a stabilizer connecting portion 77.
The wheel mounting portion 71 includes a plurality of bolts 79 for fastening the wheel with nuts.

  As shown in FIG. 4, an upper arm support portion 72, a damper unit connecting portion 76, and a stabilizer connecting portion 77 are provided in this order from the outside of the vehicle body in the vehicle width direction. That is, the upper arm 14, the damper unit 16, and the stabilizer 17 are connected to the knuckle 13 in this order from the outside of the vehicle body in the vehicle width direction.

  Further, as shown in FIG. 4, the upper arm support portion 72, the damper unit connection portion 76, and the stabilizer connection portion 77 are provided in the vicinity of the axle 26. That is, the upper arm 14, the damper unit 16, and the stabilizer 17 are connected to the knuckle 13 at substantially the same height in the vehicle body height direction in a side view and near the axle 26 of the wheel 12 (around the axle).

  The stabilizer 17 is a member that passes between the left and right rear wheels 12 (the left rear wheel is not shown). For example, when the left and right rear wheels 12 move up and down in phase, there is no function as a spring. However, when the left and right rear wheels 12 move in opposite phases (for example, when the vehicle body rolls on a curve or the like), the bar near the center is twisted, and this torsional rigidity becomes a resistance and tries to jump upward. The movement of the wheels to be controlled is suppressed, and as a result, the inclination of the vehicle body is suppressed, and the stability of the vehicle body is improved.

FIG. 5 is an enlarged rear view of the vehicle suspension apparatus shown in FIG.
That is, as shown in FIGS. 4 and 5, in the vehicle suspension apparatus 10, the knuckle 13 is swingably supported by the plurality of arms 14, 27 to 29 on the vehicle body side. The plurality of arms 27 to 29 are arms provided with welded structure portions 37, 47, 57 at their tips, so that the welded structure portions 37, 47, 57 are hidden inside the tire 19 of the wheel 12. Be placed. That is, since the welded structures 37, 47, and 57 are hidden inside the tire 19 of the wheel 12, the possibility that pebbles and the like that are flipped up by the tire 19 will hit the welded structures 37, 47, and 57 is reduced. As a result, the welded structures 37, 47, and 57 are protected from chipping (being hit by pebbles or the like during traveling).

  In the vehicle suspension apparatus 10, a plurality of arms 14, 27 to 29 are provided with a single upper arm 14 having an A shape disposed upward from the center of the wheel 12, and an I disposed downward from the center of the wheel 12. It consists of three lower arms (first to third lower arms) 27 to 29 exhibiting a mold shape. In general, the arms that constitute the welded structure are three lower arms having an I-shape, and the welded structures 37, 47, and 57 of the three lower arms 27 to 29 are accommodated inside the tire 19. The design freedom around the knuckle 13 is expanded.

  In the vehicle suspension apparatus 10, the welded structures 37, 47, and 57 of all the lower arms (first to third lower arms) 27 to 29 are arranged so as to be hidden in the tire 19, so that the welded structures 37, The arms having 47 and 57 can be uniformly protected from chipping and the like.

  The vehicle suspension device 10 according to the present invention is a suspension for the right rear wheel 12 as shown in FIG. 4, but is not limited to this, and is a suspension for the left rear wheel or the front wheel. Also good.

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

1 is a perspective view of a vehicle suspension apparatus according to the present invention. FIG. 2 is a side view of the vehicle suspension device shown in FIG. 1. FIG. 2 is a plan view of the vehicle suspension device shown in FIG. 1. FIG. 2 is a rear view of the vehicle suspension device shown in FIG. 1. It is a back surface enlarged view of the suspension apparatus for vehicles shown by FIG. It is a figure explaining the conventional suspension apparatus for vehicles of a double wishbone type. It is a figure explaining the conventional multilink type vehicle suspension apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle suspension apparatus, 12 ... Wheel (right rear wheel), 13 ... Knuckle, 14 ... Arm (upper arm), 19 ... Tire, 27-29 ... Arm (1st-3rd lower arm), 37, 47, 57 ... welded structure.

Claims (3)

In the vehicle suspension device in which a plurality of arms are swingably extended from the vehicle body side, and a knuckle for attaching a wheel to the tip of these arms is swingably supported.
A suspension system for a vehicle, wherein a welded structure portion is provided at a tip of each of the plurality of arms, and the welded structure portion is hidden inside a tire of the wheel.   The plurality of arms are composed of one upper arm having an A shape disposed above the center of the wheel and three lower arms having an I shape disposed below the center of the wheel. The suspension device for a vehicle according to claim 1.   3. The vehicle suspension device according to claim 1, wherein the lower arm is an arm having a welded structure portion at least on a knuckle side, and the welded structure portions of all the lower arms are hidden in the tire. .

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