JPH0510173U - Bottom shield plate of engine - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the spot is pulled from the spot of the shield plate to which the bracket is fixed by spot welding, the stress is dispersed in this spot and the spot peels off or cracks occur at this part. To provide a bottom shield plate for an engine capable of preventing the above. [Structure] Spot welded portion S of shield plate 4 to bracket 3
A hole 6 with an appropriate shape in the area around the bracket that overlaps the bracket 3.
To provide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to an engine lower surface shield plate which is attached to a vehicle body so as to cover the lower surface of an automobile engine.

[0002]

[Prior Art]

 A shielding plate is provided on the lower surface of the engine of the automobile mainly for the purpose of protecting the oil pan of the engine and reducing the noise outside the vehicle due to the sound generated by the engine. Therefore, the conventional shield plate covers the lower surface of the engine through the bracket 3 as shown in the enlarged perspective view of FIG. 5, which is fixed by the bolt 2 to the frame 1 to which the engine body shown in FIG. 4 is attached. The shield plate 4 made of a steel plate fixes the bracket 3 by spot welding shown by an arrow S.

In this case, since the rigidity of the bracket 3 and the rigidity of the shielding plate 4 are greatly different, stress concentrates on the spot welding S portion, the spot is peeled off, or a crack is generated on the portion of the shielding plate 4 subjected to the spot welding S. Etc. often occurs, and there is a problem that durability performance deteriorates. Therefore, there is a method of matching the rigidity of the shield plate 4 with the rigidity of the bracket 3, but in this case, the weight of the shield plate 4 increases and the weight cannot be reduced. On the other hand, if the rigidity of the bracket 3 side is decreased, No. 3 is not preferable because the durability of No. 3 decreases.

[0004]

[Problems to be solved by the device]

 If there is a large difference between the rigidity of the shield plate 4 and the rigidity of the bracket 3 that fixes the shield plate 4 to the frame 1, stress concentrates on the spot welding S portion and cracks occur in the shield plate 4. In addition, there is a problem that it is difficult to stably fix the shield plate 4 to the lower surface of the engine. The present invention has been made to solve this problem, and even if the spot welding portion of the shield plate to which the bracket is fixed by spot welding is pulled, stress concentrates on the spot welding portion, It is an object of the present invention to provide a bottom shield plate for an engine that can prevent this portion from peeling off or cracks from occurring in spot welds.

[0005]

[Means for Solving the Problems]

 As means for solving the above-mentioned problems, the lower surface shield plate of the engine of the present invention is a shield plate made of steel plate or the like fixed to the lower surface of the engine through a bracket, and is a spot welded portion with a bracket. It is characterized by opening a hole of an appropriate shape, such as an ellipse, in the portion that overlaps with the surrounding brackets. The holes absorb the movement and relieve the stress concentration.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view of an essential part of a lower shield plate of an engine of the present invention, and FIG. 3 is a perspective view of a main part of the lower shield plate of FIG. First, a shield plate 4 shown in FIGS. 1, 2 and 3 is mounted on a frame 1 to which an engine body for an automobile (not shown) is attached via a bracket 3 fixed by a bolt 2 to an oil pan on the lower surface of the engine. It is fixed so as to cover the lower structure such as, and is usually made of steel plate.

Next, the bracket 3 is fixed to the upper edge portion of the shield plate 4 by spot welding as shown by an arrow S. In this embodiment, an elliptical hole 6 is formed in the lower peripheral portion of the spot welding portion S between the shield plate 4 and the bracket 3, and at the same time, the hole 6 is located at a position overlapping the lower portion of the bracket 3. That is, the hole 6 is provided in the portion covered with the bracket 3 from the outside.

The function of the hole 6 is to disperse the stress concentrated in the spot welded portion S, and its shape is an elliptical shape arranged in the width direction of the bracket 3 as in the above embodiment. However, the shape other than the elliptical shape is appropriately selected so that the stress is dispersed in the shield plate 4 when the spot weld S is pulled and the concentration of the stress is relieved. Further, although the position of the hole 6 is preferably around the lower part of the spot welded portion S as described above, it can be selected anywhere around the spot welded part S and the hole 6 is hidden by the bracket 3.

[0009]

[Effect of the device]

 As described above, the lower shield plate of the engine of the present invention has an appropriately shaped hole around the spot welded portion of the shield plate fixed to the lower face of the engine through the bracket and overlapping with the bracket. It is configured by opening. Therefore, even if the spot part to which the bracket is fixed is pulled along with the vibration of the shield plate, the holes provided around the spot part absorb the movement of the shield plate, moderate the stress concentration, and peel off the spot part. It also has the effect of preventing cracks and improving their durability.

Further, since the hole provided in the shield plate is closed from the outside by the bracket, engine noise does not leak to the outside through the hole, and the appearance due to the hole is further provided. There is an advantage that aesthetics are maintained without the above changes.

[Brief description of drawings]

FIG. 1 is a front sectional view of an essential part of a lower shield plate of an engine of the present invention.

FIG. 2 is a side view of a main part in the AA direction of FIG.

3 is a perspective view of an essential part of the lower shield plate of FIG. 1. FIG.

FIG. 4 is a cross-sectional view of a main part of a conventional shield plate that covers a lower surface of an engine.

5 is an enlarged perspective view of the bracket of FIG.

[Explanation of symbols]

 3 Bracket 4 Shielding plate 6 Hole S Spot weld

Claims (1)

[Claims for utility model registration] [Claim 1] A shield plate fixed to the lower surface of the engine through the bracket is provided with an appropriately shaped hole in the vicinity of the spot-welded portion with the bracket, at a portion overlapping the bracket. Lower shield plate of the engine.