JPS6137513A - Hollow stabilizer - Google Patents

Abstract

PURPOSE:To enable both a stabilizer and its suspension attachment to be effectively connected each other with high reliability by configurating the end of the stabilizer in such a way that a rod section is formed on the suspension attachment at the end of the stabilizer accompanied with an engaging groove formed around the rod section in advance. CONSTITUTION:A stabilizer 1 consists of a base section 1a conected to a body of a car, and an arm section 1b, to which (1b) a suspension attachment 10 is secured. The suspension attachment 10 carries a rod section 11 which is to be inserted into a opening at the end 1c or the stabilizer 1, an external shaft 12 which is formed in an integral unit on the extended rod 11, and a collar section 13 which is located between the rod section 11 and the extended shaft 12. In addition, an engaging groove 16 is formed around the rod section 11 in advance, the groove 16 consists of a first groove 16a and a second groove 16b enabling the first groove the obtain a sufficient fastening force in the axial direction, and the second groove 16b to have a function as a whirl stop.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hollow stabilizer used in an automobile.

[Technical background of the invention and its problems]

Stabilizers are used to supplement the roll rigidity of automobiles. There are also stabilizers that have a tension rond function in addition to their original function as a stabilizer. FIG. 1 shows an example of a stabilizer that can be used for both tension and rond.

In this case, tension acts on the arm portion of the stabilizer body 1 in addition to bending and twisting.

2 indicates a threaded portion connected to the suspension device side.

By the way, recently there has been a trend to make stabilizers hollow in order to reduce the weight of vehicles or to conserve resources, but in the case of the tension rond stabilizer mentioned above, hollow ones have been put into practical use. has not yet been reached. The reason behind this is that even if stress conditions exist within the range in which hollow materials can be used, an effective and reliable connection method between the stabilizer body and the suspension device attachment member provided at its end has not been established. There are many things that can be mentioned. For example, Jikko 55-
The prior art shown in No. 153207 discloses that a mounting member made of a solid material is inserted and fixed to the end of a hollow stabilizer body, but there is a problem with the strength of the connection part and the reliability is low. I can't say it's expensive.

For this reason, conventionally, the entire stabilizer is integrally molded from a solid material, and a threaded portion 2.degree. 2, etc. is formed at the end portion of the stabilizer. However, in this case, the main body 1 is also solid and therefore heavy.

Moreover, since the main body 1 and the threaded portion 2 are integrated, it is difficult to process the thread by rolling, and the process must be performed by cutting, resulting in high costs. In addition, in the tension rond stabilizer, the accuracy of the span L in the longitudinal direction of the vehicle is strictly required, but if the main body 1 and the threaded part 2 are integrated, there is no room for correction of heat treatment distortion, and it is difficult to ensure the specified accuracy. There are also other problems.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its purpose is to effectively and reliably connect the stabilizer main body and the suspension device mounting member at the end thereof.
Therefore, it is an object of the present invention to provide a hollow stabilizer that makes it practically possible to make the stabilizer body hollow, thereby eliminating the problems associated with solid stabilizers.

[Summary of the invention]

The gist of the present invention is to include a stabilizer main body made of a hollow material, and a suspension mounting member provided at a part of the end of the stabilizer main body. At the same time, a locking groove or a recess is formed in advance on the outer periphery of the rod portion, and the rod portion is inserted into the end of the stabilizer body and soaked from the outside to attach the suspension device. A hollow stabilizer characterized in that a member is fixed to a stabilizer body.

In the hollow stabilizer having the above structure, a part of the meat of the stabilizer body enters the locking groove formed in the suspension mounting member by plastic flow and fills the locking groove, thereby effectively maintaining the connected state of both members. It can be made highly reliable. Furthermore, by adjusting the relative position in the axial direction between the stabilizer main body and the suspension device mounting member, it is possible to adjust the span in the longitudinal direction of the vehicle, which is therefore extremely effective especially in a stabilizer that also serves as a tension rod. However, the present invention can also be applied to a normal stabilizer that does not have a tension rond function.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 to 7. In FIG. 2, reference numeral 1 denotes a stabilizer main body formed by bending a hollow metal material such as an electric resistance welded tube. This stabilizer main body 1 includes a base portion 1a that is attached to the vehicle body side in the same way as shown in FIG.
It consists of arm parts 1b, 1b located on both sides of. Suspension device mounting members io, io made of a solid material such as steel are fixed to each arm portion 1b, Ib. Note that a seamless pipe or other steel pipe may be used as the material for the main body 1.

Since the mounting members '10 and 10 have the same configuration, one will be explained as a representative. The mounting member 10 includes a rod portion 11 that is inserted into the opening of the end portion 1C of the stabilizer main body, an external shaft 12 that is integrally formed on the extended length of the rod portion 11, and the star rod portion 11. and a collar portion 13 located between the outer shaft 12 and the outer shaft 12. Also, external axis 1
A threaded portion 2 is formed at the distal end portion of 2. This threaded portion 2 is connected to a suspension device (not shown).
.

A locking groove 16 is formed in advance on the outer circumference of the O-rad portion 11 by, for example, rolling. This locking groove 16 includes a plurality of first grooves 16a along the circumferential direction of the rod portion 11.
and a second groove 16b extending in the axial direction of the rod portion 11. - However, it is of course possible to have some inclination with respect to the circumferential direction and the axial direction. These first grooves 1
68... and the second groove 16b have a generally shallow V-shaped cross-sectional shape, as shown in FIG.

Then, attach the rod portion 11 to the end 1C of the stabilizer body.
As illustrated in FIG. 6, the mounting member 10 is fixed to the stabilizer body 1 by dipping in the radial direction from the outer circumferential side using a mold 20, 21 or the like to reduce the diameter. °.

Thus, according to the above configuration, a part of the meat of the end portion 1C of the stabilizer main body enters the locking groove 16 due to plastic flow, and the locking groove 16 is filled. Therefore, the first grooves 16a... can sufficiently exert the fastening force in the axial direction, and the second grooves 16b can provide the b1 function of preventing rotation. When the prototype according to this example was tested, the axial tensile breaking load was 1 ossokor, and the axial cyclic tensile test was ±320 kOr for 1 million times without failure, and ±3000
It was undamaged at JLF 500,000 times. The rotational torsional breaking load was 45 kgfm, which was sufficient for practical use as a tension rond stabilizer.

Moreover, according to the above configuration, the length of the grooved portion of the rond portion 11 is set long in advance as shown in FIG.
If the relative position in the axial direction of the suspension a-positioning member 10 is adjusted when the end portion 1C is soaked, the span L in the longitudinal direction of the vehicle can be adjusted. Therefore, it is possible to easily deal with heat treatment distortion of the stabilizer main body 1.

Furthermore, since the mounting member 10 and the stabilizer main body 1 can be molded separately, the threaded portion 2 at the end can be processed by rolling, and processing costs can be reduced.

Moreover, there is also the advantage that the threaded portion 2 can be subjected to anti-rust treatment. In other words, in the case of a conventional solid stabilizer,
Even if this portion is subjected to anti-corrosion treatment in advance, it will peel off during the subsequent heat treatment process. However, according to this embodiment, the stabilizer main body 1 and the mounting member 10 can be heat-treated separately, so that it is possible to perform anti-rust treatment such as plating on the threaded portion 2 in advance. .

By making the stabilizer main body 1 hollow, the weight can be significantly reduced compared to a conventional solid stabilizer.

In addition, when the stabilizer main body 1 is manufactured from an electric resistance welded tube, a bead portion along the axial direction is generated on the inner surface. However, with the bead portion of the lever aligned with the second groove 16b,
If the end portion 1C is soaked from the outer circumferential side in the same manner as in the above embodiment, a part of the meat of the end portion 1c can be sufficiently bitten into the second fi 16b, and the rotation prevention effect of the mounting member 10 can be further improved. You can

Note that the present invention can of course be applied to ordinary stabilizers that do not have a tension rond function. Figures 8 and 9
The figure shows an example. The mounting member 10 shown in FIG. 8 has a bifurcated connecting part 30.30 and is connected to the suspension side through a hole 31.31 formed in this connecting part 30.30. . Further, the mounting member 1G shown in FIG. 9 has a cylindrical connecting portion 32, and is connected to the suspension system via this connecting portion 32.

Other basic configurations are the same as those of the first embodiment described above, and the same effects as those of the first embodiment can be achieved.

Further, FIGS. 10 and 11 show examples in which recesses are formed instead of grooves. Figure 10 is an anti-spherical mulberry
4 recesses, FIG. 11 shows an elongated or elliptical recess.

〔Effect of the invention〕

As described above, according to the present invention, the stabilizer main body and the mounting member at the end thereof can be connected effectively and with high reliability, which is highly effective in putting the hollow stabilizer into practical use.

[Brief explanation of the drawing]

Figure 1 is a front view of the tension rond stabilizer.
2 to 7 show an embodiment of the present invention, FIG. 2 is a front view partially showing the end of the stabilizer in cross section, FIG. 3 is a plan view of the O-rad portion, and FIG. Front view A of the suspension device mounting member, FIG. 5 is a sectional view showing the shape of the groove, FIG. 6 is a front view showing an example of the mold, and FIG. 7 is a partial view of the suspension device mounting member when the position is changed. FIG. 3 is a front view shown in cross section. FIGS. 8 and 9 are front views, partially in section, of another example of the suspension mounting member. FIGS. 10 and 11 are front views showing still other examples of suspension device mounting members, respectively. 1... Stabilizer body, 1C... End, 2...
Threaded portion, 10... Suspension device mounting member, 11...0 Rad portion, 16... Locking groove, 16a... First groove, 16
b...Second groove, -3E, 3G-...Concavity? . Applicant's representative Patent attorney Takehiko SuzueN5 Figure 1a Figure 2 Figure 4Figure 6↓ Figure 7 1 Figure 89rM Figure 11

Claims (3)

[Claims] (1) A stabilizer main body made of a hollow material, and a suspension mounting member provided at the end of the stabilizer main body, and the suspension mounting member is provided with a rod portion to be inserted into the end of the stabilizer main body, A locking groove or a concave portion was previously formed on the outer circumference of the rod portion, and the rod portion was inserted into the end of the stabilizer body and soaked from the outside to fix the suspension mounting member to the stabilizer body. A hollow stabilizer characterized by: (2) The locking groove is comprised of a first groove extending substantially in the circumferential direction of the rod portion and a second groove substantially extending in the axial direction of the rod portion. Hollow stabilizer as described. (3) The hollow stabilizer according to claim 2, wherein a bead portion on the inner surface of the stabilizer main body is fitted into the second groove.