JPH0132617Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a strut tower that is formed in a fender and supports a shock absorber of a vehicle. The present invention relates to a strut tower structure in which a depression portion is formed which extends radially outward from the axis of the strut tower and continues to protrude outward in the axial direction of the circumferential side portion.

[Technical background of the invention and its problems] Vehicles are constantly subjected to various external forces such as shocks and vibrations from the road surface, and while some of these forces are absorbed by the tires, they cannot absorb all of them. Therefore,
Shock absorbers such as springs and shock absorbers are installed between the axle and the body to absorb vibrations and shocks and improve riding comfort.

However, since these vibrations and shocks also act on the fender (body) side that supports the above-mentioned shock absorbing device, it must be constructed to have sufficient rigidity.

Therefore, in the past, a substantially cylindrical strut tower was attached to the fender integrally with a reinforcing member, and the above-mentioned shock absorbing device was supported.

A specific conventional example will be described in detail based on the accompanying drawings.

As shown in FIGS. 1 and 2, the strut tower main body 1 is formed into a substantially cylindrical shape with its lower part open, and its upper part is closed to form a top surface 2. . Further, an opening 4 is provided in the top surface 2 and is formed to support a shock absorbing device. Furthermore, the top surface portion 2 has an opening 4.
A depletion portion 3 is formed that extends radially outward from the axis while avoiding the axial center, and protrudes outward from the top surface thereof.

This raised depression is formed to improve the rigidity of the strut tower.

However, when a dynamic load (shock, vibration, etc.) is applied from the shock absorber to the strut mounting bolt position 2a of the opening 4 as described above, the strut will gradually move outward in the radial direction from the strut mounting bolt position 2a of the opening 4. As the bending moment increases, the bending moment also increases and reaches its maximum value toward the outside in the radial direction. Further, this maximum bending moment has a maximum value at the upper end of the circumferential side of the strut tower.

Therefore, if the load exceeds the set conditions due to various changes in the road surface, etc., there is a problem in that the top section 2 and the strut tower main body 1 are deformed due to the overload applied due to the vertical movement of the shock absorber. Ta.

[Purpose of the invention] The purpose of the invention is to effectively solve problems in strut tower structures.

The purpose of this invention is to effectively form a depression part in the strut tower body to improve the rigidity of the strut tower, as well as to disperse external forces and eliminate stress concentration, thereby creating a safe and reliable strut. It is located in providing a tower structure.

[Summary of the invention] In order to achieve the above object, the present invention provides a cylindrical strut tower body with an outer wall that is continuous from the radial direction to the axial direction from the top surface of the strut tower body to the lower end of the circumferential side. The strut tower structure is constructed by forming protruding depression portions at intervals in the circumferential direction, and sequentially expanding the width of the depression portions in the circumferential direction toward the lower end of the circumferential side. This improves rigidity and evenly disperses external forces applied to the strut tower.

[Embodiment of the invention] Hereinafter, a preferred embodiment of the invention will be described in detail based on the accompanying drawings.

In FIGS. 3 and 4, a generally cylindrical strut tower body 1 with an open bottom is molded from a steel plate or the like and formed on an engine component 8 in order to accommodate a shock absorber. ing. Further, a top surface portion 2 is formed at the upper part of the strut tower main body 1 to cover the above-mentioned shock absorbing device. Further, this top surface portion 2 is provided with an opening portion 4 having an appropriate diameter to support one end support portion of the shock absorbing device. In particular, in the present invention, the strut tower main body 1 is provided with a continuous line extending radially outward from the shaft center at a predetermined interval in the circumferential direction from the opening 4 of the strut tower main body 1 in the axial direction of the circumferential side portion 9. , a depression portion 3 is formed that bulges outward. As shown in FIG. 5, the depression section 3 is connected from the top surface section 2 of the strut tower body 1 to the circumferential side section 9. A reinforcing member 5 is provided. Further, a fixing member 6 is integrally provided on the circumferential side portion 9 of the strut tower main body.
Further, this fixing member 6 is further connected to an engine component 8 by a support member 7 having an L-shaped cross section. As described above, since the present invention is configured, when vertical impact force or vibration propagated from the shock absorber is applied to the strut tower body 1, the diameter from the opening 4 of the strut tower body 1 These external forces are propagated outward in the direction and a bending moment is generated in each cross section. This bending moment acts radially outward on each cross section of the top surface 2 with the strut attachment bolt position 2a of the opening 4 as a load point, and reaches its maximum at the radially outer side. That is, the circumferential portion is the largest. At the same time, this bending moment is propagated and dispersed to the cross section of the peripheral side portion 4 of the strut tower main body 1. Here, if the depression part 3 is formed continuous with the top surface part 2 and the strut tower main body 1 as in the present invention, the effective cross-sectional area is increased to resist the bending moment. As a result, not only the rigidity of the top surface part 2 and the strut tower main body 1 can be increased individually, but also each part complements each other like a rigid body. In other words, the load is distributed to each part, and the rigidity of the strut tower main body 1 is increased.

With this configuration, the rigidity and strength of the strut tower 1 are improved, but in order to further improve the rigidity and strength, the strut tower 1 is constructed as shown in FIG. 6. In other words, as shown in FIG. It is formed to expand in the axial direction as it extends. In this way, by forming the depression part 3, the rigidity of the strut tower main body 1 is further increased, and the external force acting on each cross section of the top surface part 2 etc. is borne by the peripheral side part 9 strengthened by the depression part 3. As a result, the strut tower becomes even more rigid.

[Effects of the invention] As described above, if the present invention is implemented, the following excellent effects will be exhibited.

Since the external force is dispersed to each part of the strut tower, dangers such as stress concentration can be avoided.

The rigidity of the strut tower is improved as much as possible to improve safety and reliability, as well as improved maneuverability and ride comfort.

By forming a depression in the strut tower, the cross-sectional effect can be increased and the steel plate used can be made thinner.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional strut tower, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig.
The figure is a front sectional view showing one embodiment of the present invention, FIG. 4 is a perspective view showing one embodiment of the present invention, and FIG.
FIG. 6 is a perspective view showing a preferred embodiment of the present invention. In the figure, 1 is a strut tower main body, 2 is a top portion, 3 is a depression portion, and 9 is a suspension device (strut).

Claims (1)

[Scope of utility model registration request] A cylindrical strut tower main body is molded with depression portions that are continuous from the top surface of the main body to the lower end of the circumferential side and protrude outward from the radial direction to the axial direction at intervals in the circumferential direction. A strut tower structure characterized in that the circumferential width of the depression portion gradually increases toward the lower end on the circumferential side.