JPH0244561Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a positioning structure for an anchor arm for a torsion bar spring used mainly in the suspension of an automobile.

This type of anchor arm for a torsion bar spring is fixed to an anchor arm bracket or the like by an anchor bolt with the torsion bar spring given a predetermined twist.
For this reason, the anchor arm has a cylindrical body fixed at its base end that is serrated into the end of the torsion bar spring, so that it cannot rotate relative to the torsion bar spring and cannot rotate in the axial direction. It is designed to be slidable to provide flexibility in relative positional relationships. Therefore, it is necessary to position the anchor arm in the axial direction with respect to the torsion bar spring.

(Prior Art) Therefore, conventionally, as shown in FIG.
By forming a groove 21 and engaging the flange portion 11 of the anchor arm bracket 10, the anchor arm 3 is positioned relative to the torsion bar spring 1 in the axial direction.

Alternatively, as shown in FIG. 5, a positioning member 22 may be fixed to the outer periphery of the cylindrical body 4, and a flange 22a of the positioning member 22 may be engaged with the inside of the anchor arm bracket 10. In some cases, the anchor arm 3 is positioned in the axial direction with respect to the torsion bar spring 1 by .

(Problems to be Solved by the Invention) According to the positioning means for the anchor arm 3 shown in FIG. Problems also arise when the level decreases. On the other hand, according to the means shown in FIG. 5, the anchor arm 3 can be positioned from the initial assembled state to the state in which it is rotated to impart torsion to the torsion bar spring 1, as described above. In order to do
It is necessary to form the positioning member 22 with a margin in the circumferential direction of the cylindrical body 4. As a result, the weight and cost of the anchor arm 3 will increase significantly.

(Means for solving the problems) In order to solve the above problems, the present invention is configured as follows. As shown in FIG. 1, the anchor arm 3 has a U-shaped cross section, and a cylindrical body 4 is fixed to the base end 3a of the anchor arm 3 in a penetrating state. The cylindrical body 4 is not rotatable relative to the end of the torsion bar spring 1, and is slidably fitted in the axial direction so as to have a degree of freedom in relative positional relationship.

On the other hand, the anchor arm bracket 10 has a U-shaped cross section with an open upper surface, and the cylindrical body 4 of the anchor arm 3 is placed on a part of the bracket.
In this state, the tip of the anchor arm 3 is tightened to the anchor arm bracket 10 by the anchor bolt 16 with the torsion bar spring 1 given a predetermined twist.

Inside the anchor arm bracket 10,
A reinforcing member 13 is fixed in a state extending between the both side plates. A part of this reinforcing member 13 is engaged with the inside of the anchor arm 3 formed in a U-shaped cross section, and is engaged in the axial direction (first direction) of the anchor arm 3.
Protrusion 14 for positioning in the horizontal direction (in the figure)
are integrally formed.

(Function) In the above configuration, the cylindrical body 4 of the anchor arm 3
When placed on a predetermined portion of the anchor arm bracket 10, the above-mentioned protrusion 14 formed on the reinforcing member 13 of the anchor arm bracket 10 is located in an engaged state inside the anchor arm 3. Therefore, the anchor arm 3 is already positioned in its axial direction even in the initial state when it is assembled to the torsion bar spring 1, and after that, the anchor arm 3 is positioned in the axial direction in order to give a predetermined twist to the torsion bar spring 1. Even when the arm 3 is rotated and tightened with the anchor bolt 16 as shown in FIG. 1, the anchor arm 3 is properly positioned in the axial direction.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 3.

First, in Figure 2, a material such as a metal plate has a cross section U.
At the base end 3a of the anchor arm 3 press-molded into a letter shape, there is a cylinder 4 made of a material such as metal.
It is fixed by welding or the like while penetrating this anchor arm 3. As is clear from FIG. 1, an inner serration 5 is formed on a part of the inner circumferential surface of this cylinder 4, and this inner serration 5 is formed on the outer periphery of the end of the torsion bar spring 1. In order to make the outer serrations 2 relatively non-rotatable and have a degree of freedom in relative positional relationship in the mutual axial direction,
They are fitted so that they can slide freely. In other words, as will be described later, it is necessary to fix the anchor arm 3 to the anchor arm bracket 10 with the anchor bolt 16, so in order to adjust the position at that time, the axial positional relationship with respect to the torsion bar spring 1 is determined. A certain degree of freedom is required. Note that a dust cover 6 covers the space between one open end (the left open end in FIG. 1) of the cylindrical body 4 in the anchor arm 3 and the outer periphery of the torsion bar spring 1.

As is clear from FIG. 3, which shows the right side of FIG. 1, the vehicle body frame 9 has an anchor arm bracket 10 formed by press-forming a material such as a metal plate into a U-shaped cross section with an open top. One end is fixed. As is clear from FIGS. 1 and 2, flange portions 11 are formed on both sides of the upper surface of the opening of the anchor arm bracket 10, which are bent outward. A recess 12 for receiving the cylinder 4 of the anchor arm 3 is formed on the upper surface of the anchor arm bracket 10 near the tip.

Inside the anchor arm bracket 10,
A reinforcing member 13 is fixed by means such as welding while spanning between the both side plates 10a. A protrusion 14 is formed on this reinforcing member 13 by bending it upward, and when the cylindrical body 4 of the anchor arm 3 is placed in the recess 12 of the anchor arm bracket 10, the protrusion 14 is bent upward. It is possible to engage with the inside of 3. in this way,
By engaging the protrusion 14 of the reinforcing member 13 fixed to the anchor arm bracket 10 with the anchor arm 3, the anchor arm 3 is moved in its axial direction relative to the anchor arm bracket 10, that is, the torsion bar spring 1. This allows for positioning in the left-right direction in Figure 1.

In the above configuration, the cylindrical body 4 of the anchor arm 3
is serrated fitted to the end of the torsion bar spring 1 as described above, and the cylindrical body 4 is placed on the recess 12 of the anchor arm bracket 10. At this time, the anchor arm 3 is in the initial assembly position shown by the imaginary line in FIG.
is the flange portion 11 of the anchor arm bracket 10
The anchor arm 3 is stably received by the recess of the anchor arm 3, and the protrusion 14 of the reinforcing member 13 engages with the inside of the anchor arm 3 to position the anchor arm 3 in the axial direction. ing.

Here, an anchor bolt 16 that passes through the tip 3b of the anchor arm 3 upward from the bottom surface of the anchor arm bracket 10, and this bolt 1
Tighten with nut 17 screwed into 6. Along with this, the anchor arm 3 rotates from the initial position shown by the imaginary line in FIG. 3 to the state shown by the solid line, thereby twisting the torsion bar spring 1 and 1 will function as a spring material.
In this way, attach the anchor arm 3 to the anchor bolt 16.
Even when the reinforcing member 13 is tightened to the anchor arm bracket 10 by the
is engaged with the inside of the anchor arm 3 to position the anchor arm 3 in the axial direction.

The reinforcing member 13 of the anchor arm bracket 10 is designed to prevent the side plates 10a of the anchor arm bracket 10 from opening outward due to the reaction force when the anchor arm 3 is tightened with the anchor bolt 16 as described above. This is an existing member for holding. 1 and 3, reference numeral 18 denotes a swivel interposed between the head of the anchor bolt 16 and the bottom plate of the anchor arm bracket 10, and between the nut 17 and the tip 3b of the anchor arm 3. It shows.

(Effects of the invention) As described above, the present invention uses a simple structure that utilizes the reinforcing member of the anchor arm bracket, which is an existing member, to position the anchor arm in the axial direction by tightening it from the initial state of assembly. It can always be reliably maintained up to the desired condition, and is highly effective in simplifying the structure and reducing costs.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention;
The figure is a front view showing the positioning structure of the anchor arm, FIG. 2 is an external perspective view showing the related structure between the anchor arm and the anchor arm bracket, FIG. 3 is a right side view of FIG. FIG. 5 is a front view showing different conventional structural examples in correspondence with FIG. 1. 1... Torsion bar spring, 3... Anchor arm, 3a... Base end, 3b... Tip, 4...
Cylindrical body, 10... Anchor arm bracket, 13...
...Reinforcement member, 14...Protrusion, 16...Anchor bolt.

Claims (1)

[Scope of utility model registration request] The cylindrical body fixed to the base end of the anchor arm, which has a U-shaped cross section, cannot rotate relative to the end of the torsion bar spring, but has a degree of freedom in relative position in the axial direction. This cylindrical body is placed on a U-shaped anchor arm bracket with an open upper surface, and the tip of the anchor arm is placed in a predetermined position on the torsion bar spring with respect to this anchor arm bracket. This is a positioning structure for an anchor arm for a torsion bar spring, which is tightened by an anchor bolt in a twisted state, and the U A positioning structure for an anchor arm for a torsion bar spring, characterized in that a protrusion that engages with the inside of a letter-shaped anchor arm is integrally formed.