JPH03287404A - Suspension rod - Google Patents

Abstract

PURPOSE:To prevent the imposition of a large load on a suspension rod so as to obviate the necessity of reinforcing the suspension rod by allowing a user to recognize abnormality by the deformation of a protruding part when the user applies a jack to the suspension rod and tries to jack it up by mistake. CONSTITUTION:Thin plate like protruding parts 13 are protrusively provided at the tip parts 12 of the side parts, opened facing downward, of a suspension rod 9 (a bar member 10) for connecting a vehicle body and a wheel supporting body, along the whole length of the bar member 10. In case a user applies a jack 14 to the lower end (the protruding part 13), for instance, and tries to jack up also the bar member 10 of the suspension rod 9 by mistake, the protruding part 13 is bent or buckled first so as to be deformed before the bar member 10 is lifted up by the ascent of the jack 14. This abnormality is recognized by the user to call his attention to jacking-up or the like, and the bar member 10 is thereby prevented from the imposition of a large load.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a suspension rod that constitutes a suspension system for an automobile.

(Prior Art) An automobile suspension system is provided with a suspension rod 3 that connects a vehicle body (not shown) to a wheel support 2 that rotatably supports a wheel 1, as shown in FIG. 7, for example. There is. The suspension rod 3 is, for example, as shown in FIG. 8, a rod-shaped member 4 having a U-shaped cross section, with cylindrical attachment parts 5 and 6 provided at both ends, and one end is attached to the wheel support 2 at the other end. are pivotally attached to the vehicle body via rubber bushes (not shown), respectively, and are used to position the wheel support 2. The suspension rod 3 is an element that determines the suspension geometry, and is a component that directly affects the driving performance of the vehicle.

By the way, the car body of an automobile is usually provided with a reinforced part under the floor for applying jacking when jacking up for repairs, inspections, etc. Additionally, a hook or the like is provided with sufficient strength to tie a towing lobe when towing or being towed a broken-down vehicle or the like. However, since the suspension rod 3 is arranged under the floor almost horizontally in the vehicle width direction, it is easy to apply a jack or tie a tow rope to it, so it may be handled in such a way due to a user's mistake.

When the suspension rod 3 is jacked up by applying a jack, or when the tow rope is tied to the suspension rod 3 and the vehicle is towed, a much larger load acts on the suspension rod 3 than the load that is applied during running. Furthermore, while compressive and tensile loads mainly act in the longitudinal direction of the suspension rod 3 during running, loads act in the bending direction, so the suspension rod 3 is easily deformed and damaged.

Therefore, in the past, the internal pressure of the rod-shaped member 4 was increased as shown in FIG. 9 so that it would not be deformed or damaged even if the user accidentally jacked it up or tied a tow rope to it and pulled it. In order to increase the strength of the suspension rod 3, a flange 7 is provided at the lower part as shown in FIG. 1O, or a reinforcing member 8 is provided as shown in FIG. 11.

(Problem to be solved by the invention) However, the above conventional example has the following problems.

The products shown in Figures 9 to 11 use a large amount of material by thickening the wall thickness and providing flanges 7 or reinforcing members 8 to increase strength, and only the load applied during running is considered. Since it is heavier than the one designed and manufactured, the total vehicle weight becomes heavier. Further, if the weight of the suspension rod 3 is heavy, the unsprung weight of the suspension system becomes large, resulting in a problem that ride comfort and steering stability deteriorate. Furthermore, the structure shown in FIG. 1O requires space because the flange 7 protrudes, and the structure shown in FIG. 11 requires a separate reinforcing member 8, which increases cost.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a suspension rod that prevents a user from accidentally applying jacks to increase the jacks or towing a tow rope with a tying rope. purpose.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides suspension rods 9 (rod-shaped members 10
) is characterized in that a thin plate-shaped convex portion 13 is provided protrudingly provided over the entire length of the rod-shaped member 10 at the tip 12 of the side portion which faces downward and opens.

(Function) By configuring the suspension rod 9 of the present invention in this way, when a load is applied to the downwardly facing open side of the suspension rod 9, only the plate-shaped convex portion 13 is easily deformed. It can notify the user of abnormalities.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. A cutaway view of the suspension rod 9 of this embodiment is shown in FIG. 1, and a cut surface of FIG. 1 is shown in FIG.

In Section 1 and FIG. 2, cylindrical attachment portions 11 are fixed to both ends of a rod-shaped member 1O having a substantially U-shaped cross section (the figures show only one end).

Similar to the conventional example shown in FIG. 8, the mounting portion 11 is mounted in such a direction that the open side of the bar member 10 faces downward when mounted on a vehicle (not shown). The rod-shaped member 10 is manufactured by press-molding a plate material such as an iron plate into a U-shaped cross section. A thin plate-like convex portion 13 is provided on both of the tip portions 12 of the side portions of the rod-like member 10 that face downward and are open, extending over the entire length of the rod-like member IO. The rod-shaped member 10 having a protruding portion 13 is a rod-shaped member 10a having a U-shaped cross section (see Fig. 3), which is designed taking only the load applied during running into consideration (see Fig. 3). . The rod-shaped member 1O and the convex portion 13 may be provided integrally as shown in FIGS. 1 and 2, or may be provided separately and fixed to each other as shown in FIG. 4.

The operation of this embodiment configured as above will be explained next.

To attach it to a vehicle, similarly to the conventional suspension rod shown in FIG. 8, the mounting portions 11 at both ends are pivotally attached to the wheel support and the vehicle body via rubber bushings.
It is attached so that the convex portion 13 is on the lower side.

As shown in FIG.
4, the thin plate-shaped convex part 13 is easily deformed, so the convex part 1 is
3 is bent or buckled and deformed as shown in the figure.

Alternatively, as shown in FIG. 6, when a towing rope 15 is tied to the rod-like member 10 and an attempt is made to tow it, the convex portion 13 bends before a large load is applied to the rod-like member 10 due to the tension of the tow rope 15. transform. The deformation of the convex portion 13 makes the user aware of the abnormality and alerts the user to stop jacking up or pulling. In this way, it is possible to prevent a large load from being applied to the rod-shaped member 10 due to jacking up, pulling, etc. can.

As described above, since it is possible to prevent a large load from being applied to the rod-shaped member lO of the suspension rod in addition to the load applied by running, the strength of the rod-shaped member lO is increased as in the past in order to withstand a large load other than the load caused by running. There is no need to raise the suspension rod, making it possible to reduce the weight and size of the suspension rod and reduce manufacturing costs. and,
By reducing the weight of the suspension rod and reducing the unsprung weight of the suspension system, handling stability and riding comfort can be improved. Furthermore, by making the suspension rod smaller, the installation space can be reduced.

In this example, the cross-sectional shape of the rod-shaped member IO is approximately U-shaped, but the same effect can be obtained even with other shapes such as a pipe shape by providing a thin plate-shaped convex portion at the lower end. .

(Effects of the Invention) As described in detail above, the present invention is achieved by providing a thin plate-shaped convex portion projecting over the entire length of the suspension rod on the downwardly facing side of the suspension rod that connects the vehicle body and the wheel support. , when a load is applied to the downwardly facing side of the suspension rod, only the convex portion deforms easily. As a result, if the user accidentally puts a jack on the suspension rod and tries to increase the jack, or ties a tow rope to it and tries to tow it, the convex part deforms and the user is injured before a large load is applied to the suspension rod. It is possible to recognize an abnormality and give a warning to stop jacking up or towing.

Further, it is possible to prevent a large load from being applied to the suspension rod due to jacking up, towing, etc.

In this way, by preventing a large load from being applied to the suspension rod in addition to the load that is applied by driving, it is possible to eliminate the need for reinforcing the suspension rod in order to withstand large loads other than the load caused by driving, making the suspension rod lightweight and compact. It is possible to reduce the manufacturing cost at the same time. Furthermore, by reducing the weight of the suspension rod and reducing the unsprung weight of the suspension system, handling stability and riding comfort can be improved. Further, by making the suspension rod smaller, the mounting space can be reduced, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention;
Fig. 2 is a sectional view showing the cut plane of Fig. 1, Fig. 3 is a longitudinal sectional view of the main part of a suspension rod designed and manufactured considering only the load due to running, and Fig. 4 is a cross-sectional view of another suspension rod of the present invention. A longitudinal cross-sectional view of the main parts of the embodiment. Fig. 5 is a partial longitudinal cross-sectional view showing the state in which the suspension rod shown in Fig. m1 is jacked up, and Fig. 111N6 is a partial longitudinal cross-sectional view showing the suspension rod shown in Fig. FIG. 7 is a diagram showing a suspension system of an automobile; FIG. 118 is a partially cutaway perspective view of a conventional suspension rod; FIG. 9 is a diagram showing the main components of a conventional suspension rod. FIG. 1O is a vertical cross-sectional view of the main part of another conventional suspension rod, and FIG. 11 is a vertical cross-sectional view of the main part of yet another conventional suspension rod. 9 Suspension rod 10 Rod-shaped member 12 Tip 13 Convex portion Patent applicant Suzuki Motor Co., Ltd. Figure 3 Figure 1 Figure 3 Figure 2 9... Suspension Rotsu Diagram 6 Diagram

Claims (1)

[Claims] (1) A suspension rod characterized in that a thin plate-like convex portion is provided on a downwardly facing side of a rod-like member that connects a vehicle body and a wheel support, extending over the entire length of the rod-like member.