JPS6242859Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an automobile body vibration isolation structure.

Generally, measures are taken to reduce vibrations in automobile bodies, such as increasing the thickness of the panels that make up the vehicle body, and increasing rigidity by forming unevenness in the cross-sectional shape. This often involves disadvantages such as lowering productivity and reducing the effective space inside the vehicle body, such as the passenger compartment and engine room.

Particularly near the instrument panel, vibrations transmitted from the wheels via the steering shaft are likely to occur during driving, so anti-vibration measures are required.
There is a fear that the effective space in front of the driver's seat will be reduced.

This idea was created in view of the above problems, and is an automobile body vibration isolation system that can effectively reduce vibrations without significantly increasing weight, reducing productivity, or reducing effective space inside the vehicle. The purpose is to provide structure.

This invention consists of left and right brackets welded to the ends of the inside surface of the cowl top in the width direction of the vehicle, a surface along the inside surface of the cowl top and screwed to the brackets, and a surface along the inside surface of the front pillar, and a surface connected to the inner surface of the front pillar; a surface extending from the upper and lower ends in a direction substantially orthogonal to the pair of surfaces; a rear end of the surface along the inner surface of the front pillar; and a surface along the inner surface of the cowl top; Left and right braces each having a flange that connects the inner ends in the width direction, and an instrument that traverses the vicinity of the instrument panel in the width direction of the vehicle body, and the left and right braces are integrally connected to the flat parts of the left and right ends thereof. The above object is achieved by providing a panel reinforcement and connecting the inner surface of the front pillar and the bracket using the left and right braces.

Further, this invention achieves the above object by forming a predetermined gap between the inner surface of the cowl top and the left and right braces in the vehicle body vibration isolation structure of the automobile.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the main parts of an embodiment of the vehicle body vibration isolation structure for an automobile according to the present invention.

As shown in the figure, in this embodiment, the inner surface 1A of the front pillar 1 and the inner surface of the cowl top 2 are connected near the joints 3 on the left and right sides of the vehicle body by braces 4, and the left and right braces 4 are connected to each other by the instrument. The instrument panel reinforcement 6 is connected to both ends of a pipe-shaped instrument panel reinforcement 6 that extends in the width direction of the vehicle body in the vicinity of the instrument panel (not shown).

The brace 4 has a substantially mountain-shaped horizontal cross-sectional shape, and has a surface 4A parallel to the inner surface 1A of the front pillar 1 and a surface 4B parallel to the inner surface 2A of the cowl top 2. As shown in FIG. 4, a recess 4C is formed at approximately the center in the height direction of the second side surface 4B so as to protrude in the two direction of the cowl top.

The brace 4 is screwed onto the inner surface 1A of the front pillar 1 by bolts 7 at the surface 4A, and the surface 4B of the brace 4 is screwed onto the inner surface 2A of the cowl top 2.
It is screwed onto a bracket 8 provided at A with a bolt 9, thereby connecting the front pillar 1 and cowl top 2.

Further, the instrument panel reinforcement 6 has an end portion that fits into the recess 4 of the brace 4.
C, and is screwed into the inner side of the surface 4B of the brace 4 by a bolt 10 at the flat end portion 6A.

Reference numeral 4D in FIG. 2 indicates flanges formed at the upper and lower ends of the brace 4 to increase its rigidity. These upper and lower flanges 4D extend in a direction substantially orthogonal to the pair of surfaces 4A and 4B, and
It is arranged so as to connect the rear end of A and the inner end of the surface 4B in the vehicle body width direction.

In the case of this embodiment, the brace 4, together with the instrument panel reinforcement 6, increases the rigidity of the connecting part between the front pillar 1 and cowl top 2, increases the bending and torsional rigidity of the vehicle body, and further improves the vibration isolation effect. This has the advantage of allowing

Moreover, since the brace 4 is provided on the interior side, the space inside the vehicle can be used effectively, and the flange 4D can be provided with a large extension. Furthermore, this flange 4D has a surface 4A.
Since the tips of flange 4 and 4B are connected, the flange 4
Since D is arranged in the direction where rigidity is most needed, the rigidity of the connection between the front pillar 1 and the cowl top 2 is greatly increased.

Furthermore, if the brace 4 is directly screwed onto the cowl top 2, water will enter the vehicle interior through the mounting bolt holes, so it is necessary to attach elastic packing or the like to the bolt holes to make it waterproof.
is not directly connected to the cowl top 2, but forms a predetermined gap with the inner surface 2A of the cowl top, and is screwed onto the bracket 8 welded to the cowl top 2, so that the cowl top 2
There is no need to provide any means to prevent water from entering. The presence of such an elastic packing reduces the rigidity of the brace to the cowl top 2.

In the case of the above embodiment, the use of the bracket 8 prevents water from entering, while increasing the rigidity of the connection of the brace 4 to the cowl top 2 and reducing vibration.

Since the present invention is configured as described above, it is possible to improve the bending and torsional rigidity of the car body at a low cost with good workability, without significantly increasing weight, increasing the number of parts, or decreasing productivity, and reducing the resonance frequency. This has the excellent effect of reducing vibration by increasing the difference between the suspension's unsprung resonance frequency and the suspension's unsprung resonance frequency.

In addition, the flange can greatly increase the rigidity of the brace itself and the joint rigidity between the cowl top and the front pillar, and the bracket can prevent water from entering from the cowl top, while increasing the joint rigidity and reducing vibration. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of an embodiment of the automobile body vibration isolation structure according to the present invention, FIG. 2 is an enlarged perspective view showing the brace of the same embodiment, and FIGS.
The figure is an enlarged sectional view taken along the - line and - line in FIG. 1. 1...Front pillar, 1A...Inner surface, 2...
Cowl top, 2A...Inner surface, 3...Joint part,
4... Brace, 4A, 4B... Surface, 4D... Flange, 6... Instrument panel reinforcement.

Claims (1)

[Claims for Utility Model Registration] (1) Left and right brackets welded to the ends of the inside surface of the cowl top in the width direction of the vehicle, a surface along the inside surface of the cowl top and screwed onto the brackets, and inside the front pillar. a surface extending along the side surface and connected to the inner surface of the front pillar, a rear end of a surface extending from the upper end and the lower end in a direction substantially perpendicular to the pair of surfaces and along the inner surface of the front pillar, and the cowl top; Left and right braces each have a flange that connects the inner end of the surface along the inner surface in the vehicle width direction, and the left and right braces are integrated into a flat part at the left and right ends of the instrument panel that traverses the vicinity of the instrument panel in the vehicle width direction. an instrument panel reinforcement that is connected to the front pillar, and the front pillar inner surface and the bracket are connected by the left and right braces. (2) The automobile body vibration isolation structure according to claim 1, wherein a predetermined gap is formed between the inner surface of the cowl top and the left and right braces.