CN107444046A - Draft hitch - Google Patents

Abstract

The present invention provides a suspension device capable of improving corrosion resistance and NV resistance. The strut suspension (10) is equipped with a shock absorber (12) and a steering knuckle (18), and the main body (28) of the steering knuckle (18) is composed of a vertical wall (32), a bottom wall (34) and a frame (36). ) structure, the steering knuckle (18) also has: a bifurcated portion (30), which sandwiches the protruding portion (26) of the connecting member (22) provided on the shock absorber (12) side; the side wall portion (44) , which is configured to overlap the protruding part (26) when viewed from the vehicle width direction (left-right direction), and connect the branch walls (42, (42) of the bifurcation part (30); and the lower wall part (46 ), which is substantially perpendicular to the side wall portion (44) and connects the lower portion of the bifurcated portion (18).

Description

Suspension

technical field

The invention relates to a suspension device of a vehicle.

Background technique

For example, Patent Document 1 discloses a suspension structure including a knuckle having a bifurcated portion branched parallel to each other. The mounting part of the shock absorber is fastened between the bifurcated parts with clamping bolts. In Patent Document 1, with such a configuration, the assemblability of the running part can be improved.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2010-116082

Contents of the invention

However, for example, there are gaps between the bifurcated portion and the mounting portion of the shock absorber (between the clamping surface and the clamped surface) due to splashes, brake dust, etc. Mud, dust, and the like may accumulate in the gap, which may lower the corrosion resistance of the mounting portion of the shock absorber.

In addition, there is a demand to improve the NV resistance performance of the suspension device.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a suspension device capable of improving corrosion resistance and NV resistance.

In order to achieve the above objects, the present invention provides a suspension device including a steering knuckle having a fork portion sandwiched by a connecting portion provided on the shock absorber side, wherein the steering knuckle has a wall portion The wall portion is disposed so as to overlap the connection portion when viewed from the vehicle width direction, and connects the branch portions.

According to the present invention, the wall portion of the knuckle is disposed so as to overlap the connection portion when viewed from the vehicle width direction, and is provided so as to connect the branch portions. By providing this wall portion, it is possible to shield the connection portion from brake dust which causes corrosion and mud splashing from below. Accordingly, in the present invention, corrosion resistance can be improved. In addition, in the present invention, the wall thickness on the knuckle side can be increased, and the NV resistance performance can be improved by reducing the natural vibration frequency.

In addition, the present invention is characterized in that the knuckle has another wall portion that is substantially perpendicular to the wall portion and that connects lower portions of the branch portion.

According to the present invention, by providing another wall portion substantially perpendicular to the wall portion, mud splashes from the lower side of the branch portion can be reliably shielded by another wall portion.

In the present invention, a suspension device capable of improving corrosion resistance and NV resistance performance can be obtained.

Description of drawings

FIG. 1 is a perspective view of a strut type suspension according to an embodiment of the present invention.

2( a ) is a perspective view of the steering knuckle shown in FIG. 1 , and (b) is a partially cutaway enlarged perspective view of the steering knuckle shown in FIG. 1 .

Fig. 3(a) is a front view of the steering knuckle shown in Fig. 2(a), (b) is a right side view of the steering knuckle, (c) is a rear view of the steering knuckle, and (d) is a top view of the steering knuckle (floor plan).

Fig. 4 is an arrow view showing the positional relationship between the connecting member and the knuckle as viewed from the direction of arrow A in Fig. 1 .

Explanation of reference signs:

10 strut suspension (suspension device)

12 shock absorbers

18 steering knuckle

22 Connecting part (joint part)

26 Protruding part (connection part)

30 Forks

42 branch wall

44 Side wall part (wall part)

46 Lower wall (another wall)

detailed description

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a perspective view of a strut suspension according to an embodiment of the present invention. In each figure, "front and rear" indicates the vehicle front-rear direction, "left and right" indicates the vehicle width direction (left-right direction), and "up and down" indicates the vehicle up-down direction (vertical up-down direction).

As shown in FIG. 1 , the vehicle includes a strut suspension (McPherson strut front suspension, suspension device) 10 . The strut suspension 10 includes a shock absorber 12 for applying a damping force, and a lower spring seat 14 provided at a middle portion of the shock absorber 12 .

In addition, the strut suspension 10 has a spring 16 interposed between a lower spring seat 14 and an unillustrated upper spring seat, and a knuckle 18 . In addition, in this embodiment, the case where the strut type suspension 10 was applied to the left front wheel 20 was illustrated, but it is not limited to this, and it can apply to any of the left and right front wheels and the left and right rear wheels. . It should be noted that between the steering knuckle 18 along the vehicle width direction and the left front wheel 20, a brake device (brake piston, brake disc, etc.) not shown in the figure that applies braking force to the left front wheel 20 is disposed .

The damper 12 has: a damper main body 12a having a piston assembly including a piston not shown in the figure; 12b. A connecting member (connection portion) 22 for connecting the shock absorber 12 to the knuckle 18 is connected to a lower end of the shock absorber 12 .

The connection member 22 has a bottomed cylindrical portion 24 and a protrusion 26 . The bottomed cylindrical portion 24 has a substantially bottomed cylindrical shape, and the lower portion of the damper main body 12a is fitted into the bottomed hole portion. The protrusion 26 integrally protrudes radially outward from the outer peripheral surface of the bottomed cylindrical portion 24 , has a rectangular cross-section, and extends parallel to the axial direction. A pair of bolt insertion holes (not shown) penetrating therethrough are formed at predetermined intervals in the protrusion 26 .

Fig. 2(a) is a perspective view of the steering knuckle shown in Fig. 1, Fig. 2(b) is a partially cut and enlarged perspective view of the steering knuckle shown in Fig. 2(a), and Fig. 3(a) is a perspective view of Fig. 2(a) The front view of the steering knuckle is shown, Fig. 3(b) is a right view of the steering knuckle, Fig. 3(c) is a rear view of the steering knuckle, and Fig. 3(d) is a top view (plan view) of the steering knuckle.

The knuckle 18 pivotally supports a drive shaft D (see FIG. 1 ) in a rotatable manner. As shown in FIG. 2( a ), the knuckle 18 integrally constitutes a body portion 28 having a plurality of arm connecting portions and a branch portion 30 located on the upper portion of the body portion 28 .

The main body portion 28 is integrally formed with a vertical wall 32 , a bottom wall 34 , and a frame 36 . The vertical wall 32 is formed to have a surface substantially parallel to the vehicle front-rear direction, and to extend substantially in the vertical vertical direction. The bottom wall 34 is provided at the lower end of the vertical wall 32 and protrudes from the vertical wall 32 toward the inside in the vehicle width direction. The frame body 36 is substantially perpendicular to the vertical wall 32 and is formed along the outer shape of the vertical wall 32 . A substantially circular through-hole 38 through which the drive shaft D penetrates is formed in a substantially central portion of the vertical wall 32 .

In addition, in this embodiment, the vertical wall 32, the bottom wall 34, and the frame body 36 are integrally formed, but it is not limited to this. For example, after forming the vertical wall 32, the bottom wall 34, and the frame body 36 independently, they may be integrally integrated by joining means, such as welding, for example.

The plurality of arm connecting parts are constituted by a lower arm connecting part 40a, a control arm connecting part 40b, and a set of caliper connecting parts 40c and 40d. Fastening holes 42 for fastening the respective arms (not shown) with bolts and nuts are formed in the respective arm connection portions.

The lower arm connection part 40a is provided in the bottom wall 34, and connects the lower arm which is not shown via a ball joint (not shown). The control arm connection part 40b is provided in the left side part (refer FIG.3(a)) of the housing|casing 36 seeing from the inside of a vehicle width direction, and connects the control arm which is not shown in figure. A pair of brake caliper connecting parts 40c, 40d are arranged on the right side of the frame body 36 and the branch part 30 (see FIG. brake calipers.

The branch portion 30 has a pair of branch walls 42 , 42 facing each other and extending substantially parallel upward from the main body portion 28 . Furthermore, the branch portion 30 has a side wall portion (wall portion) 44 extending substantially in the vertical direction and connecting side portions of the pair of branch walls 42 , 42 to each other. The side wall portion 44 is provided at a position close to the left front wheel 20 (see FIG. 1 ).

Further, the branch portion 30 has a lower wall portion (another wall portion) 46 extending in a direction substantially perpendicular to the vertical direction and connecting the lower ends of the pair of branch walls 42 , 42 to each other. The lower wall portion 46 is provided so as to protrude from the lower end of the side wall portion 44 toward the inner side in the vehicle width direction. A space portion 48 surrounded by a pair of branch walls 42 and 42 , a side wall portion 44 , and a lower wall portion 46 is formed in the branch portion 30 (see FIG. 2( b )). The space portion 48 communicates with the opening 50 on the inner side in the vehicle width direction and the opening 52 on the upper side of the branch portion 30 (see FIG. 2( b ) and FIG. 3( d )).

Bolt insertion holes 56 (see FIG. 3( b )) into which bolts 54 (see FIG. 1 ) are inserted are formed in each branch wall 42 . Insert the bolt 54 through the bolt insertion hole 56 along the pair of branch walls 42 and 42 and the bolt insertion hole (not shown) of the protruding part 26 (connection member 22 ), and fasten the threaded part of the bolt 54 (not shown). Nuts are used, whereby the connection member 22 is clamped and fixed by the bifurcated portion 30 .

When the fastening member 22 is sandwiched and fixed to the branch portion 30 by the bolt 54 and the nut, a gap is formed between the lower end surface of the protrusion 26 and the upper surface of the lower wall portion 46 . When the strut suspension 10 is mounted on a vehicle, water or the like that has entered the space 48 through the opening 52 on the upper side is discharged to the outside through the gap. In addition, the upper surface of the lower wall portion 46 facing the space portion 48 is formed by, for example, an inclined surface that descends downward in a direction away from the side wall portion 44 , thereby improving discharge performance.

In addition, instead of providing a clearance between the lower end surface of the protruding part 26 and the upper surface of the lower wall part 46, a drainage unit (not shown) may be provided, so that the lower end surface of the protruding part 26 and the lower wall part The upper surface of 46 abuts. By making the protrusion 26 and the lower wall 46 contact each other, it can be applied to the positioning of the bolt insertion hole 56 of the pair of branch walls 42 , 42 and the bolt insertion hole (not shown) of the protrusion 26 during assembly.

The side wall portion 44 is composed of a vertically long rectangular wall portion (see FIG. 3( a )) as viewed from the inside in the vehicle width direction, and is located in the vehicle width direction closer to the wheel (left front wheel 20 ) than the protrusion 26 of the connecting member 22 . outside (see Figure 1). Further, the side wall portion 44 is disposed at a position overlapping the coupling member 22 (the bottomed cylindrical portion 24 and the protruding line portion 26 ) when viewed from the inside in the vehicle width direction (see FIG. 4 described later).

The lower wall portion 46 is formed in a substantially rectangular shape along the vehicle width direction when viewed from above (planar view). By providing the lower wall portion 46 , the space portion 48 on the lower side of the branch portion 30 is blocked (see FIG. 2( b )).

The strut suspension 10 according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described next. FIG. 4 is an arrow view showing the positional relationship between the coupling member and the knuckle as viewed from the direction of arrow A in FIG. 1 . In addition, in FIG. 4, the bottomed cylindrical part 24 and the protrusion part 26 of the connection member 22 are drawn by the imaginary line which consists of a dashed-two dotted line.

As shown in FIG. 4 , in the present embodiment, side wall portion 44 of knuckle 18 is arranged to overlap bottomed cylindrical portion 24 and ridge portion 26 of coupling member 22 when viewed from the vehicle width direction. In addition, the side wall portion 44 of the knuckle 18 is provided so as to connect the side surfaces of the pair of branch walls 42 , 42 of the branch portion 30 .

In the present embodiment, the side wall portion 44 functions as a protective wall, whereby, for example, it is possible to ideally shield the protruding line portion 26 from brake dust, which is a cause of corrosion, generated by a brake device not shown in the figure, The effect of splashing mud from below. As a result, in the present embodiment, the corrosion resistance of the coupling member 22 (protruding portion 26 ) that attaches the shock absorber 12 to the knuckle 18 can be improved.

In addition, in this embodiment, it is possible to increase the thickness of the branch wall 42 , the vertical wall 32 , etc. constituting the knuckle 18 compared to conventional ones. Thus, in the present embodiment, the NV resistance performance can be improved by reducing the natural frequency.

Further, in the present embodiment, by providing the knuckle 18 with the lower wall portion 46 substantially perpendicular to the side wall portion 44 , mud splashes from the lower side of the branch portion 30 can be reliably shielded by the lower wall portion 46 .

Claims (2)

1. a kind of draft hitch, it possesses knuckle, and the knuckle has the furcation for sandwiching the connecting portion located at damper side,

Characterized in that,

The knuckle has wall portion, overlapping with the connecting portion when wall portion is configured to from overall width direction, and by institute State and link up between furcation.

2. draft hitch according to claim 1, it is characterised in that

The knuckle has another wall portion, and another wall portion is substantially orthogonal with the wall portion and connects the bottom of the furcation Knot gets up.