JPH04163217A - Torsion bar spring supporting structure - Google Patents

Abstract

PURPOSE:To secure the sufficient length of an anchor arm without causing body weight increase and cost increase by piercing a side member with an anchor arm, and supporting the respective end parts of the anchor arm on both sides of the side member through brackets. CONSTITUTION:At one end of a torsion bar spring 7 with the other end thereof connected to an unillustrated suspension link, there is provided an anchor arm 8 extended in the radial direction of the torsion bar spring 7. Openings 11, 12 are formed on both side faces of a side member 2, and the anchor arm 8 is pierced in the width direction of the side member 2 through these openings 11, 12. A first bracket 13 is disposed on the vehicle inner side of the side member 2, and a second bracket 14 is disposed on the vehicle outer side. One end of the anchor arm 8 is supported by a recessed part 15 formed at the tip part upper end of the first bracket 13. The tip part of an anchor bolt 10 mounted to the end part of the anchor arm 8 is inserted into a through hole 16 formed in the tip part lower face of the second bracket 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a support structure for a torsion bar spring used as a spring for an automobile suspension.

BACKGROUND OF THE INVENTION Some suspensions for automobiles use torsion bar springs to absorb shocks and vibrations between the wheels and the vehicle body.

An example of this suspension will be explained with reference to FIG.

This suspension has a knuckle 1 which is a wheel support member.
is attached to the side member 2 and the cross member 3 so as to be able to swing vertically via an upper arm 4 and a lower arm 5 as suspension links, and a shock absorber 6 and a torsion bar spring 7 are coupled to the lower arm 5. It becomes. Torsion bar spring 7
One end is connected to the rotating shaft of the lower arm 5 by spline connection or a fixed bracket, and the other end is provided with an anchor arm 8 extending in the radial direction, and this anchor arm 8 is supported by the side member 2. . The other end of the torsion bar spring 7 is supported by the side member 2 in a twisted state so as to force the tip of the lower arm 5 downward.

By the way, the longer the length of the anchor arm that extends in the radial direction from the torsion bar spring, the more the load input to the vehicle body can be alleviated. A longer anchor arm is used as the support structure for the bar spring.

That is, in this support structure, a bracket 9 is coupled to the vehicle-inward side surface of the side member 2, and the base end of the bracket 9 supports one end of the anchor arm 8, while the distal end supports the other end of the anchor arm 8. I try to support. still,
In the figure, reference numeral 10 denotes an anchor bolt for supporting the reaction force F of the torsion bar spring 7 on the bracket 9.

This similar structure is shown in, for example, Japanese Utility Model Application Publication No. 50-406814.

Problems to be Solved by the Invention However, in the case of the conventional torsion bar spring support structure shown in FIG. There is a problem in that it leads to an increase in the amount and cost.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a support structure for a torsion bar spring that can ensure a sufficient length of an anchor arm without increasing vehicle weight or cost.

Means for Solving the Problems As a means for solving the above-mentioned problems, the present invention provides an anchor arm extending in the radial direction of the torsion bar spring, one end of which is connected to a suspension link and the other end of the torsion bar spring. In a support structure in which both ends of the anchor arm are supported by side members via brackets, the anchor arm is passed through the side member, and brackets are provided on both sides of the side member to support each end of the anchor arm. The parts are supported on both sides of the side members.

Since the working anchor arms pass through the side members, the brackets will be shaped to match the length of the anchor arms projecting from both sides of the side members.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIG. 1.2. Note that the same reference numerals are used for the same parts as those shown in Fig. 3.4.

In the drawings, 2 is a side member, and 7 is a torsion bar spring whose one end is connected to a suspension link (not shown) and biases the tip of the suspension link downward. An anchor arm 8 extending in the radial direction is provided at the other end of the torsion bar spring 7, and the other end of the torsion bar spring 7 and this anchor arm 8 are connected by serration connection or the like, so that both are always connected. It is designed to rotate as one.

Openings 11.degree. and 12 are formed on both sides of the side member 2, and the anchor arm 8 passes through the side member 2 in the width direction through these openings 11.12.

Reference numeral 13 denotes a first bracket connected to the side surface of the side member 2 on the inside (left side in FIG. 1), and 14 is connected to the side surface of the side member 2 on the outside (right side in FIG. 1). This is the second bracket.

The first and second brackets 13 and 14 are each coupled to a position surrounding the opening 1112 on the side surface of the side member 2, and the first bracket 13 has an arcuate recess 15 formed at the upper end of its tip. This recess 15 rotatably supports one end of the anchor arm 8 (more precisely, the end of the torsion bar spring 7 to which one end of the anchor arm 8 is coupled).

Further, the second bracket 14 has a through hole 16 formed on the lower surface of its distal end, into which the distal end of the anchor bolt 10 attached to the end of the anchor arm 8 is inserted. Anchor bolt 10 inserted into through hole 16
The nut 1 is attached to the tip of the second bracket 14 from the bottom side.
7 are screwed together, and the reaction force F of the torsion bar spring 7 is supported by the second bracket 14 by the anchor bolt 10 and nut 17. The anchor bolt 10 and nut 17 are originally intended to support the reaction force F of the torsion bar spring 7 on the second nib and racket 14, but by rotating the nut 17 appropriately, the anchor arm 8 is moved against the second bracket 14. It is also possible to adjust the biasing force of the torsion bar spring by changing the height of the end.

With the above configuration, the anchor arm 8 extending in the axial direction from the torsion bar spring 7 passes through the side member 2 in the width direction, and is attached to both the inside and outside of the side member 2. It is supported by a first bracket 13 and a second bracket 14.

Note that the direction of arrow A in FIG. 1.2 is toward the outside of the vehicle, and coincides with the direction of arrow A in FIG. 3.

In the case of the conventional type in which both ends of the anchor arm are supported by a bracket connected to the inside side of the side member (see Figure 4), the length of this bracket must be ensured to be longer than the length l of the anchor arm. However, in this support structure according to the present invention, since the anchor arm 8 passes through the side member 2 in the width direction, if the anchor arm 8 has the same length l, the first bracket 13 and the second bracket 14 are It becomes possible to shorten the combined length by the same amount as the width of the side member 2.

Therefore, not only is it possible to reduce the weight and cost of the vehicle, but also the rigidity of the bracket for supporting the anchor arm 8 is increased.

Effects of the Invention As described above, the present invention allows the anchor arm to pass through the side member while providing brackets on both sides of the side member, and connects each end of the anchor arm to both sides of the side member through these brackets. Since it is supported, it is possible to shorten the length of the bracket by the length of the anchor arm that passes through the side member.

As a result, the bracket can be made smaller than conventional brackets, and a sufficient length of the anchor arm can be secured without increasing vehicle weight or cost.

[Brief explanation of drawings]

Fig. 1 is a sectional view taken along the line n-■ in Fig. 2 showing an embodiment of the present invention, Fig. 2 is a perspective view showing the same embodiment, and Fig. 3 is an example of a suspension using a torsion bar spring. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. 2... Side member, 7... Torsion bar spring, 8... Anchor arm, 13... First bracket (bracket), 14... Second bracket (bra) 9

Claims (1)

[Claims] (1) An anchor arm extending in the radial direction of the torsion bar spring is provided at the other end of the torsion bar spring whose one end is connected to a suspension link, and both ends of the anchor arm are supported by side members via brackets. In the support structure, an anchor arm passes through the side member, and brackets are provided on both sides of the side member to support each end of the anchor arm on both sides of the side member. Support structure.