JPH0217161Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an engine sound insulating cover device for reducing noise emitted from the side wall of an engine block of an automobile.

Conventionally, when installing a sound insulating cover on an automobile engine block, supporting studs are provided on the main body of the block to directly support the sound insulating cover.

This requires additional machining of studs or bolt attachment bosses on the engine block, as well as hole machining and thread machining for the bosses, which requires changes to the engine mold, which inevitably increases costs and investment.

This idea was made to solve this problem, and its purpose was to attach the sound insulation cover to a ready-made engine block by using simple mounting materials without the need for the troublesome additional processing described above. An object of the present invention is to provide a sound insulating cover device for an engine.

First, I would like to give a summary of this idea.
A sound insulating cover with a sound absorbing material is installed through a bracket provided vertically downward using the mounting bolts for the upper part of the engine part, and the lower part of the sound insulating cover is attached to the lower part of the engine part. This is a sound insulating cover device for an engine that is fixed with parts mounting bolts.

This will be explained in detail with reference to the drawings showing one embodiment.

In FIGS. 1 and 2, 1 is an engine block, and 2 is a sound insulating cover attached facing the side wall 3 of the engine block. Reference numeral 4 designates an exhaust manifold, and a plate-shaped bracket 6 is fixed to a mounting bolt 5 for mounting the exhaust manifold to the engine block 1 in a substantially vertical direction. The sound insulating cover 2 is attached to this bracket 6 via a vibration isolating mount 7.
The upper end of is fixed. Reference numeral 8 denotes a fixing bolt or nut, and the vibration-proof mount 7 is formed of an elastic body such as vibration-proof rubber. Further, the sound insulation cover 2 is fixed inside the bracket 6.
By doing so, the entire structure can be made compact. Reference numeral 9 denotes a sound absorbing material provided on the sound insulation cover 2 and disposed between the sound insulation cover 2 and the engine block 1. The lower end of the sound insulation cover 2 is connected to the mounting bolt 1 of the oil pan 10.
1 through the bracket 6a. 7 is an anti-vibration mount. These details are shown enlarged in FIGS. 3 and 4.

Although not shown in the drawings, the lower end or lower part of the sound insulating cover 2 may be attached using bearing cap side bolts depending on the type of engine.

Further, as shown in FIG. 1, the upper end of the sound insulating cover 2
Install using. 14 indicates a damper pulley. As described above, the sound insulation cover is attached using the mounting bolts of the accessory parts attached to the engine section.

Next, as a mounting device for a sound insulating cover 2 for an engine, a prior art as shown in FIG. 5 has been disclosed. (Utility Model Application No. 56-139837) In the same figure, a indicates an engine block, b a mounting bolt, c a bracket, d a sound insulation cover, and e a vibration isolation mount.

However, in such a device, the mounting bolt b is provided so that the bracket C is not provided vertically downward but is provided horizontally, so that the bracket c is formed into a cantilever shape, and the sound insulating cover d is attached to this. Therefore, there is a problem in that the weight of the sound insulating cover d is applied in a direction that bends the bracket c, which tends to cause vibration. Since the bracket 6 of the sound insulation cover 2 of this invention is provided vertically rather than cantilevered, the weight of the sound insulation cover 2 is applied to the bracket 6 in the tensile direction, resulting in less vibration. There is. Further, in the conventional one shown in FIG. 5, since the sound insulating cover d is located outside the vibration isolating mount e, it is troublesome to attach and remove it, which is inconvenient during maintenance. In the device of this invention, the vibration isolating mount 7 is attached so as to be outside the sound insulating cover, so it will be easy to remove. Also, maintainability will be good.
Also, for the same reason, it would take up less space. Also, the device could be made more compact.

This invention is constructed as described above, and a sound insulating cover having a sound absorbing material is provided through a bracket provided vertically downward with the mounting bolt of the upper part of the engine part, and the lower part of the sound insulating cover is Since the upper bracket is oriented vertically downward by fixing it with the mounting bolts of the accessory parts at the bottom of the engine section, the weight of the sound insulation cover attached to it is applied to the bracket in the pulling direction. Vibration can be extremely reduced.

Note that in the conventional device in which the bracket is installed horizontally, the weight of the sound insulating cover provided thereon is applied in a direction that bends the bracket;
This can be easily understood if you compare it with the fact that vibrations are more likely to occur.

Further, the troublesome work of additional machining of bolt attachment bosses, drilling of boss holes, and screw machining on the engine block, as well as the resulting increase in costs, can be omitted.

[Brief explanation of drawings]

Figures 1 to 4 show examples of this invention. Figure 1 is a front view of the engine sound insulation cover device, Figure 2 is a side view of the same, and Figure 3 is an enlarged view of the part shown in Figure 2. 4 is an enlarged sectional view of the portion shown in FIG. 3, and FIG. 5 is a partial sectional view of a conventional similar device. 1...Engine, 2...Sound insulation cover, 4...Exhaust manifold, 5...Mounting bolt,
11...Mounting bolt, 12...Inlet manifold, 13...Mounting bolt.

Claims (1)

[Scope of utility model registration request] Through the bracket provided vertically downward with the mounting bolt for the upper part of the engine part,
A sound insulating cover device for an engine, comprising a sound insulating cover having a sound absorbing material, and a lower part of the sound insulating cover being fixed to a lower part of an engine section with a bolt for attaching an accessory part to the lower part.