JPH0752786Y2 - Torsion bar anchor arm holding cross member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicle cross member, and more particularly to a structure of a cross member that holds a torsion bar anchor arm.

[Prior Art] A torsion bar may be provided in order to apply a spring force to the upper control arm of the suspension. Normally, one end of the torsion bar is a torque arm provided on the control arm and the other end is a cross member. Each of the provided anchor arms is spline-connected.

The details of the cross member side in this case will be described with reference to FIG. 5. The cross member 1 extending in the vehicle width direction has a U-shaped cross section, and both ends (only one end is shown) 11 of the side member 4 extending in the front-rear direction. It is welded and fixed to the side surface. An anchor arm 2 is disposed below the end 11 of the cross member 1, and a rear end of the torsion bar 5 is connected to a cylindrical portion 21 thereof which is substantially parallel to the side member 4.

An arm portion 22 extending along the lower surface of the cross member 1 is formed on the anchor arm 2, and the tip end of the arm portion 22 is a well-known anchor arm swivel 61, bolt 62, adjuster sheet 64,
It is fixed to the cross member 1 by an adjuster nut 63.

Relatively thick (about 3.2 t) reinforcing plates 71, 72 are joined to the front and rear side surfaces of the cross member end portion 11 (FIG. 6),
A semicircular notch 73 (FIG. 5) is formed at the lower edge of the reinforcing members 71, 72 projecting downward of the cross member 1, and the outer circumference of the cylindrical portion 21 of the anchor arm 2 is spring-reacted at this portion. Abutted and held by force. Reinforcing plate 7 on the outer periphery of the cylindrical portion 21
The part that comes into contact with 1, 72 is the groove 23 over the entire circumference,
This restricts the front-back movement of the anchor arm 2.

[Problems to be Solved by the Invention] By the way, in the above-described conventional structure, since it is necessary to provide the reinforcing plates 71 and 72 on the front and rear surfaces of the left and right end portions of the cross member, respectively, the number of parts is large and the anchor arm has a large number of parts. Groove 23 on the periphery
It takes time and effort to form.

The present invention solves such a problem, and an object of the present invention is to provide a crossbar for holding a torsion bar anchor arm that reduces the number of parts and manufacturing labor, and realizes improvement in strength.

[Means for Solving the Problem] The structure of the present invention will be described with reference to FIGS. 1 to 3. The torsion bar anchor arm holding cross member is a bottom surface of both ends of a U-shaped cross member 1 extending in the vehicle width direction. To
A receiving surface 1a against which the cylindrical wall 21 of the torsion bar anchor arm 2 abuts, and a restricting portion 1b for restricting the axial movement of the torsion bar anchor arm 2 are formed, and inside the cross member both end portions 11 are formed. Is provided with a reinforcing plate 3 that divides the U-shaped space into upper and lower parts.
The outer end 12 of the cross member 1 is joined and fixed to the inner side surface of the side member 4 extending in the vehicle front-rear direction, and the restricting portion on the lower surface of the cross member 1 holds the tubular portion 21 at the front-rear position in the axial direction. Parallel standing wall of torsion bar anchor arm 2
A flange 13 is formed by a hole 1b into which 221 fits and engages, and at the opening edge of the hole 1b facing these parallel standing walls 221, the facing interval is gradually narrowed upward from below.
Is formed so that the parallel standing wall 221 is sandwiched between the narrowest portions of these flanges 13.

[Operation] In the cross member having the above structure, the receiving surface of the torsion bar anchor arm 2 is provided on the lower surface of both ends 11 of the cross member 1.
Since 1a is formed, it is not necessary to join the reinforcing plates to the front and rear side surfaces of the cross member as in the conventional case. If the position of the anchor arm 2 is fixed, the vertical dimension of the U-shaped cross-section cross member 1 can be made larger than that of the conventional one, so that the bending rigidity is improved.

Further, since the reinforcing plate 3 that divides the U-shaped space into upper and lower portions is provided, the cross member 1 has excellent torsional rigidity, and the outer end 31 of the reinforcing plate 3 is formed on the side member 4 together with the outer end 12 of the cross member 1. Since they are joined and fixed, the bonding strength with the side member 4 is also high.

Further, since the restricting portion 1b for restricting the axial movement of the anchor arm 2 is formed on the lower surface of the cross member 1, it is not necessary to form a groove on the outer circumference of the cylindrical portion of the anchor arm as in the conventional case.

In particular, in the present invention, the restriction portion is formed by the punched hole 1b, and the flange 13 at the opening edge of the punched hole 1b is formed so that the facing interval is gradually narrowed upward from below. As a result, the parallel standing wall 221 can be fitted and assembled smoothly.

Further, due to the presence of these flanges 13, sufficient strength of the lower surface of the cross member in which the punched hole 1b is formed is maintained.

[Embodiment] In FIGS. 1 to 4, a cross member 1 extending in the vehicle width direction has a U-shaped cross section, and both ends 12 (only one of which is shown) formed with a flange have side members 4 extending in the vehicle front-rear direction. It is joined to the inner surface of the. Inside the end portion 11 of the cross member 1, a U-shaped space is vertically divided and a relatively thin (about 2.0 t) reinforcing plate 3 is provided. The reinforcing plate 3 has a U-shape (Fig. 4). The compatible wall is joined to the inner surface of the side wall of the cross member 1, and the outer end 31 (FIG. 3) of the flange is joined to the inner surface of the side member 4.

An arc-shaped anchor arm receiving surface 1a is formed on the lower surface of the end portion 11 of the cross member 1, and the parallel standing wall 221 of the anchor arm 2 described later can be inserted from this receiving surface 1a toward the vehicle center. A long hole 1b which is a hole is formed, and further, a flange 13 which is erected upward is formed on a half peripheral edge of the long hole 1b on the receiving surface 1a side (FIG. 4). As shown in the figure, the flanges 13 facing each other are formed so as to be inclined so that the facing interval gradually narrows upward from below. Also,
The reinforcing plate 3 corresponds to the elongated hole 1b and has the receiving surface.
An elongated hole 3a (Fig. 2) is formed so as to be shorter than the elongated hole 1b so as not to open on the 1a.

The anchor arm 2 has a cylindrical portion 21 that is substantially parallel to the side member 4.
And an arm portion 22 having a parallel standing wall 221 (FIG. 2) extending inwardly along the cross member 1, and a part of the parallel standing wall 221 is fitted into the elongated hole 1b to form a cylinder. Part 21
Is in contact with the receiving surface 1a. A known anchor arm swivel 61 is rotatably supported on the front and rear side walls of the cross member 1, and a bolt 62 penetrating the anchor arm swivel 61 is rotatably mounted on the long hole 3a.
A semicircular adjuster sheet 64 is connected to the bolt 62 by a adjust nut 63 extending downwardly through 1b, and the tip of the arm portion 22 is supported by the adjuster sheet 64.

A rear end of the torsion bar 5 whose front end is connected to an upper control arm (not shown) is spline-fitted to the cylindrical portion 21 of the anchor arm 2, and the cylindrical portion 21 is crossed by the spring reaction force of the torsion bar 5. It is held in contact with the receiving surface 1a of the member 1 (FIG. 4). Then, in this state, the parallel standing walls 221 formed on the entire circumference of the tubular portion 21 as an extension of the arm portion 22 are sandwiched between the narrowest portions of the flange 13 at the peripheral edge of the elongated hole 1b, and the tubular portion 21 is formed. The axial movement of is restricted.

The cross member having the above structure can be composed of three parts, that is, the main body of the cross member 1 and the reinforcing plates 3 provided at both ends 11 thereof, as compared with the conventional five parts including the reinforcing plates 71 and 72 before and after both ends. The number of parts can be reduced.

By eliminating the conventional reinforcing plates 71 and 72 and forming the receiving surface 1a on the lower surface of the cross member 1, if the position of the anchor arm 2 is fixed, the vertical dimension of the U-shaped cross member 1 can be increased. As a result, the bending rigidity of the cross member 1 is improved.

Further, as the reinforcing plate 3 provided in the cross member 1, a relatively thin plate can be used, and the torsional rigidity of the cross member 1 is improved by providing the reinforcing plate 3. Further, the outer end 31 of the reinforcing plate 3 is connected to the outer end 12 of the cross member 1.
At the same time, by joining the inner surface of the side member 4, the joint strength between the cross member 1 and the side member 4 is also improved.

A long hole 1b that has been conventionally provided on the lower surface of the cross member 1 for penetrating the bolt 62 is extended, and a parallel standing wall 221 that constitutes the anchor arm arm portion 22 is formed on the flange 13 formed at the peripheral edge of the long hole 1b. Since they are engaged with each other to restrict the axial movement of the anchor arm 2, it is not necessary to form the groove 23 on the outer circumference of the anchor arm tubular portion 21 as in the conventional case. Since the flanges 13 are formed such that the facing interval gradually narrows upward from below, these flanges 13 can serve as guides for smoothly inserting and assembling the parallel standing walls 221, and the existence of the flanges 13 is possible. Due to the long hole 1b
Sufficient strength of the lower surface of the cross member formed with is also secured.

[Effect of the Invention] As described above, the crossbar for holding the torsion bar anchor arm of the present invention has a small number of parts and can secure sufficient strength, and is excellent in that it does not require labor for working the anchor arm. It is effective.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a rear view of an end portion of a cross member, and FIG. 2 is II-II of FIG.
FIG. 3 is a perspective view of the end of the cross member, FIG. 4 is a cross sectional view taken along line IV-IV of FIG. 1, FIGS. 5 and 6 show a conventional example, and FIG. 5 is a cross member. FIG. 6 is a perspective view of the end portion, and FIG. 6 is a sectional view taken along line VI-VI in FIG. 1 …… Cross member 1a …… Receiving surface 1b …… Long hole (regulating part) 11 …… End 12 …… Outer end 2 …… Torsion bar anchor arm 21 …… Cylinder 22 …… Arm 221 …… Parallel Standing wall 3 ... Reinforcing plate 31 ... Outer edge 4 ... Side member 5 ... Torsion bar

Claims (1)

[Scope of utility model registration request] 1. A receiving surface for abutting a tubular portion of a torsion bar anchor arm on the lower surface of both ends of a U-shaped cross member extending in the vehicle width direction, and movement of the torsion bar anchor arm in the axial direction of the tubular portion. Restricting parts for restricting are formed respectively, and reinforcing plates for partitioning the U-shaped space into upper and lower parts are arranged in both ends of the cross member, and the outer ends of these reinforcing plates and the outer end of the cross member are arranged in the vehicle longitudinal direction. The restriction member on the lower surface of the cross member is joined and fixed to the inner side surface of the extending side member, and the restricting portion on the lower surface of the cross member is formed by a through hole into which a parallel standing wall of a torsion bar anchor arm is fitted and engaged. In addition, at the opening edge of the hole facing the parallel standing walls, a flange is formed in which the facing interval gradually narrows upward from below, and the parallel gap is formed between the narrowest portions of these flanges. Cross member for the torsion bar anchor arm holding when taken so as to sandwich the wall.