JPH09175131A - Lateral rod for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lateral rod for a vehicle which can attain improvement of assemblability. SOLUTION: A pair of plane parts 16, 16 opposed to each other are formed in an end part side of an almost cylindrical lateral rod main unit 9. A spanner is meshed with a pair of the plane parts 16, 16, so as to apply large force to the lateral rod main unit 9, the lateral rod main unit 9 can be easily twisted over its lengthwise direction with a bush of an axle side boss serving as the support point, a car body side boss 10b is easily guided between a pair of plate parts 6b, 6b of a car body side bracket 6, in its turn, assemblability is improved, also shortening of an assemly time can be attained. Assembly can be performed in a condition that a suspension is lowered down by a certain degree, causing large prying of a bush 13, according to a car height change generated by assembly in a full rebound condition, is eliminated, by this amount, durability of the bush 13 can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lateral rod used in a vehicle for restricting lateral movement.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a 3-link type suspension. In the figure, the axle housing 1 holds the other ends of a pair of trailing arms 3 whose one end is pivotally supported by a vehicle body 2 (see FIG. 11) through intermediate members 4. One of the pair of intermediate members 4 (left rear wheel W
_As shown in FIG. 8, a shaft member 5 is attached to the intermediate member 4 on the ( _L side) so as to extend rearward of the vehicle. A small diameter portion 5a is formed on the tip side of the shaft member 5, and a male screw 5b is provided on the tip side of the small diameter portion 5a. A vehicle body side bracket 6 is attached to the vehicle body 2 near the other intermediate member 4 (on the right rear wheel W _R side) of the pair of intermediate members 4. The vehicle-body-side bracket 6 is composed of a substantially rectangular bracket body 6a and a pair of plate portions 6b vertically provided so as to face the bracket body 6a. The pair of plate portions 6b have holes 6c so as to face each other. Has been formed. A lateral rod support shaft 7 is inserted through the holes 6c of the pair of plate portions 6b and supported by the vehicle body side bracket 6.

A lateral rod 8 is interposed between the shaft member 5 and the lateral rod supporting shaft 7. As shown in FIGS. 8 and 9, the lateral rod 8 is roughly composed of a substantially tubular lateral rod body 9 and bosses 10 attached to both ends of the lateral rod body 9 by welding. Hereinafter, for convenience of description, of the two bosses 10, the one on the shaft member 5 side is appropriately referred to as the axle side boss 10a, and the one on the vehicle body side bracket 6 is appropriately referred to as the vehicle body side boss 10b. The boss 10 includes an outer cylinder 11 welded to the lateral rod body 9, an inner cylinder 12 housed in the outer cylinder 11, and an inner cylinder 1.
2 and an outer cylinder 11 and a bush 13 made of a cylindrical elastic material.

As shown in FIG. 8, the axle side boss 10a is inserted through the small diameter portion 5a of the shaft member 5, and is attached to the shaft member 5 through the washer 15 by screwing the nut 14 into the male screw 5b. Further, the lateral rod support shaft 7 is inserted into the vehicle body side boss 10b, and the lateral rod support shaft 7 is held by the pair of plate portions 6b, so that the vehicle body side boss 10b is supported by the vehicle body side bracket 6. There is.
As described above, the lateral rod 8 is supported between the shaft member 5 (axle side) and the vehicle body bracket 6 (vehicle body 2 side of the vehicle) via the bush 13 by supporting the axle side and vehicle body side bosses 10b. It has been installed in. Also,
A suspension spring (not shown) is interposed between the vehicle body 2 and the axle housing 1.

FIG. 7 shows a three-link type suspension using a lateral rod 8 which is an example of the prior art. However, a torsion beam type suspension equipped with the lateral rod 8 has both ends of the lateral rod 8 similarly to FIG. Is a shaft member 5 (axle side), a vehicle body side bracket 6 (vehicle body 2
Side) has been supported by. 7 to 9 show that the lateral rod body 9 of the lateral rod 8 has a tubular shape, but instead of this, a lateral rod body 9A having a U-shaped cross section as shown in FIG. There is also the lateral rod 8 used.

In the above-mentioned prior art, the left and right rear wheels W _L ,
As W _R moves up and down, the angle of the axle housing 1 with respect to the vehicle body 2 changes significantly, and this change in angle causes the bushes 13 of the axle side and vehicle body side bosses 10a, 10b to twist. Then, normally, with an empty car or about two people riding, with the suspension at the center of the high range of the regular vehicle, the bushes 13 at both ends of the lateral rod 8 are attached to the vehicle body 2, axle side, etc. so that the twisting is zero. The angle with respect to the part is set. The reason for setting in this way is to suppress the twist of the bush 13 as much as possible during traveling, reduce the operation resistance, and improve the durability of the bush 13.

In this case, unless the height of the wheel (suspension state) is around 0, the angular difference between the bush 13 and the mounting portion is generated, and it becomes difficult to assemble the lateral rod 8. When the lateral rod 8 is assembled in a vehicle factory, for example, as shown in FIG. 12, the suspension is lowered (in the rebound state) to improve workability. With respect to the operating angle (angle of the axle housing 1 with respect to the vehicle body 2) θ, both ends (axle side, vehicle body side bosses 10a, 10)
Since each bush 13 in b) is twisted by an angle of θ / 2, it is difficult to assemble and remove the lateral rod 8. As a countermeasure against this, it is conceivable to lower the suspension greatly (in a full rebound state) to assemble it, but in this case, by setting the twist 0 in the full rebound state, the twist of the bush 13 becomes large during operation, and the bush 13 The durability deteriorated and could not be a solution.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a lateral rod for a vehicle, which can improve the assemblability.

[0009]

According to the first aspect of the present invention,
A lateral rod for a vehicle, which has a substantially tubular lateral rod main body provided with bushes of elastic material on both ends, and is interposed between the vehicle body side and the axle side of the vehicle via the bushes, It is characterized in that a pair of flat portions facing each other is formed on the lateral rod body. According to this structure, the spanner can be engaged with the pair of flat portions.

According to a second aspect of the present invention, there is provided a lateral rod main body having a substantially U-shaped cross section with bushes made of an elastic material provided on both end sides, and between the vehicle body side and the axle side of the vehicle via the bushes. A lateral rod for a vehicle to be interposed, characterized in that a reinforcing member for reinforcing a side wall portion is provided inside the lateral rod body. According to this configuration, the reinforcing member receives the force from the spanner by engaging the spanner with the reinforcing member installation portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A vehicle lateral rod 8 according to a first embodiment of the present invention will be described below with reference to FIGS. It should be noted that description and illustration of the same members and parts as those shown in FIGS. 7 to 12 will be omitted as appropriate.

On the end portion side of the lateral rod body 9, a pair of flat surface portions 16 and 16 facing each other are provided. Then, at the end of the lateral rod body 9, the boss 10 (10a,
10b) is welded. In the vehicle lateral rod 8 thus configured, the spanner 17 is provided in the pair of flat surface portions 1.
6 and 16 can be engaged. Then, by engaging the spanner 17 with the pair of flat surface portions 16, 16, a large force can be applied to the lateral rod body 9. Therefore, for example, even when the suspension is lowered as shown in FIG. 12, the lateral rod body 9 can be easily twisted over the entire longitudinal direction by using the bush 13 of the axle side boss 10a as a fulcrum, and as shown in FIG. The body side boss 10b to the body side bracket 6
It becomes easy to guide between the pair of plate portions 6b, 6b, which improves the assembling property and shortens the assembling time. Further, as shown in FIG. 12, since the suspension is assembled in a state in which it is lowered to some extent, a large amount of twisting of the bush 13 due to a change in vehicle height caused by the assembly in the full rebound state as described above is not caused, and that much The durability of the bush 13 can be improved.

In the above embodiment, the pair of flat portions 16,
16 is provided on the side of the assembly end of the lateral rod body 9. Therefore, the lateral rod body 9 can be twisted over the entire longitudinal direction, the force applied to the spanner 17 can be reduced, and the working efficiency can be improved.

As described above, the lateral rod 8 can be assembled by the wrench 17 which is a general tool, and it is not necessary to provide special alignment equipment. In addition, the boss 1 that accommodates the bush 13 in comparison with the diameter of the lateral rod body 9
When the width of 0 is slightly large, the welded portion is narrow and the bead provided on the boss 10 is small, resulting in poor weldability. However, as described above, the pair of flat surface portions 16 and 16 are formed into the lateral rod body. By providing it on the side of the assembling end in 9, the space on the side of the boss 10 becomes wider accordingly.
A large bead provided on the boss 10 can be removed to improve weldability.

In the above embodiment, the pair of flat portions 16,
Although the example in which 16 is provided on the end side of the lateral rod body 9 is shown, the present invention is not limited to this, and may be provided on the central part side.

Next, a vehicle lateral rod 8 according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 6.
The lateral rod 8 has a lateral rod body 9A having a substantially U-shaped cross section. Lateral rod body 9
A reinforcing plate (reinforcing member) 18 is welded inside the vicinity of the end of A to reinforce the side wall portion 19 of the lateral rod body 9.

In this vehicle lateral rod 8, it is possible to assemble the wrench 17 by engaging the wrench 17 with the side wall portion 19 of the lateral rod body 9 and twisting the lateral rod 8. Therefore, the lateral rod body 9 can be twisted over the entire longitudinal direction, the force applied to the spanner 17 can be reduced, and the working efficiency can be improved.

As described above, the lateral rod 8 can be assembled by the wrench 17 which is a general tool, and it is not necessary to provide special alignment equipment. In addition, spanner 1
The reinforcing plate 18 supports the side wall portion 19 of the lateral rod body 9 by engaging 7 with the reinforcing plate 18 installation portion,
It is possible to prevent the lateral rod body 9 from being deformed or buckled by the force applied to the spanner 17.

[0019]

According to the first aspect of the invention, since a large force can be applied to the lateral rod body by engaging the spanner with the pair of flat portions, the lateral rod can be easily assembled by twisting. As a result, the assembly time can be shortened. Assembly can be performed with a spanner, which is a general tool, and no special alignment equipment is required. By providing a pair of flat parts on the side of the assembly end of the lateral rod body, the lateral rod body can be twisted over the entire longitudinal direction, the force applied to the spanner can be reduced, and the working efficiency can be improved. it can. Also, if the boss width that accommodates the bush is slightly larger than the diameter of the lateral rod body, the welded part is narrow and the bead of the boss part is small, resulting in poor weldability. By providing the flat surface portion on the assembly end portion side of the lateral rod body, the bead of the boss portion can be made large and the weldability can be improved.

According to the second aspect of the present invention, the spanner can be assembled by rotating the lateral rod by engaging the spanner with the lateral rod body, and by engaging the spanner with the reinforcing member installation portion, the reinforcing member is separated from the spanner. It is possible to prevent the lateral rod body from being deformed and buckled due to the force. You.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle lateral rod according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the lateral rod.

FIG. 3 is a diagram schematically showing an assembled state of the lateral rod.

FIG. 4 is a perspective view showing a vehicle lateral rod according to a second embodiment of the invention.

FIG. 5 is a plan view showing the lateral rod.

FIG. 6 is a cross-sectional view showing the lateral rod.

FIG. 7 is a diagram showing a conventional example of a vehicle lateral rod that is used 3
It is a perspective view showing a link type suspension.

FIG. 8 is a cross-sectional view showing the lateral rod.

FIG. 9 is a perspective view showing the lateral rod.

FIG. 10 is a perspective view schematically showing another example of a conventional lateral rod.

FIG. 11 is a diagram schematically showing the lateral rod in a state where the twist of the bush is zero.

FIG. 12 is a diagram schematically showing a lateral rod with a suspension lowered.

[Explanation of symbols]

 8 Lateral rod 9,9A Lateral rod body 13 Bushing 16 Flat portion 18 Reinforcing plate

Claims (2)

[Claims] 1. A lateral rod for a vehicle, which has a substantially tubular lateral rod body having bushes made of an elastic material on both ends, and is interposed between the vehicle body side and the axle side of the vehicle via the bushes. A lateral rod for a vehicle, characterized in that a pair of flat portions facing each other is formed on the lateral rod body. 2. A vehicle having a lateral rod body having a substantially U-shaped cross section with bushes made of an elastic material at both ends, and being interposed between the vehicle body side and the axle side of the vehicle via the bushes. A lateral rod for a vehicle, wherein a reinforcing member for reinforcing a side wall portion is provided inside the lateral rod body.