JPH07672Y2 - Engine sound insulation cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an engine sound insulation cover of a vehicle.

[Prior Art] With the development of modern traffic communication and the development of transportation means, speeding up of vehicles has been attempted. For this reason, the output of the engine of the vehicle is also improved, and the noise resulting from this increase in output has become a social problem.

In order to prevent noise caused by increasing the output of the engine,
It is common practice to improve the muffler and install a sound insulation cover on the sound source on the wall surface of the cylinder block of the engine.

Known engine sound insulation covers for preventing such noise are disclosed in Japanese Utility Model Laid-Open Nos. 51-96146 and 58-165226.

FIG. 5 shows an engine sound insulation cover 10 of this type. The structure is such that the sound source 15 of the cylinder block 13 is
It is covered with a shielding plate 17 made of metal via a sound absorbing material 23 made of glass fiber, and the shielding plate 17 is tightened with a bolt 21 to which an elastic body 19 is attached. Sticked to 13.

[Problems to be solved by the device]

However, it is difficult for the sound absorbing material 23 made of glass fiber to be processed in conformity with the shape of the cylinder block 13. Therefore, as shown in FIGS. 5 and 6, there are irregularities 28 such as ribs. There is a possibility that a gap 29 may be created in the engine and the engine sound may leak.

As a means for solving this problem, the one in which the sound source of the engine is covered with a shielding plate through the elastic member shown in Japanese Utility Model Publication No. 51-96146, and the seal member shown in Japanese Utility Model Publication No. 61-76136 are used. It has been proposed to use a hollow spinner rubber and a damping plate as a damping steel plate.

The above-mentioned one, particularly the latter one, can effectively seal the engine sound by bringing the seal member into close contact with the engine having irregularities such as ribs.

However, above the engine, which is generally placed horizontally,
There is an injection pump, from which fuel or lubricating oil leaks and accumulates on the cylinder block.

Further, the seal member made of the hollow sponge rubber described above is provided inside the shield plate, and the leaked oil is easily adsorbed by the seal member, which may cause ignition by the heat of the engine.

The present invention has been made to solve the above drawbacks,
An object of the present invention is to provide an engine sound insulation cover that effectively shields engine sound and prevents the risk of fire due to leaked oil.

[Means for Solving the Problems]

The engine sound insulation cover according to the present invention is an engine sound insulation cover in which a sound source on a wall surface of a cylinder block of an engine is covered with a shielding plate through a sealing member arranged so as to surround the sealing member, and oil permeates the surface. It is made of hollow sponge rubber with a blocking coating, and the shielding plate is made of a damping steel plate that also functions as a tray for leaked oil and has an outer circumference bent toward the injection pump. A pipe that collects oil on the shielding plate. Is arranged.

[Action]

With the above configuration, the sealing member made of hollow sponge rubber is in close contact with the concavities and convexities of the cylinder block to seal the engine sound, and the shield plate of the damping steel plate prevents the generation of sound due to resonance.

The oil leaked from the injection pump is received by a shield plate made of a vibration-damping steel plate that also serves as a tray, and is collected by a pipe arranged on the shield plate.

Therefore, the leaked oil does not collect on the cylinder block, and even if the leaked oil touches the sealing member of the hollow sponge rubber inside the shield plate, its surface is coated and absorbed. There is no danger of fire.

〔Example〕

Hereinafter, the details of the present invention will be described with reference to the embodiments shown in the drawings.

1 to 4 show an embodiment of the engine sound insulation cover of the present invention.

On the sound source 33 of the cylinder block 31 of the engine, a shielding plate made of a vibration damping steel plate 35 that also serves as the tray 36 is arranged. The shielding plate made of the vibration damping steel plate 35 is made of a steel plate capable of suppressing vibration with a resin layer interposed therein, and is fixed to the cylinder block 31 by being tightened with four bolts 37 as shown in FIG. There is.

Then, between the vibration-damping steel plate 35 and the sound source 33 of the cylinder block 31, a sealing member made of a hollow sponge rubber 39 having a surface coated with a material for blocking permeation of oil or the like surrounds the sound source 33. Are arranged. Further, as shown in FIG. 3, the damping steel plate 35 is fixed by the washer 41 pressed by the bolt 37 pressing the elastic body 43. A spacer 45 is inserted into this bolt 37, and when the bolt 37 is tightened to a certain extent, the washer 41 will move to the spacer 45.
The vibration-damping steel plate 35 is appropriately pressed and fixed in order to prevent further tightening. Further, in the hollow sponge rubber 39, when the vibration damping steel plate 35 is pressed against the sound generation source 33 by the bolt 37, the vibration damping steel plate 35 is pressed against the sound generation source 33, and as shown in FIG. Correspondingly deformed to the unevenness 47 of, and adheres.

Incidentally, in FIG. 3, the alternate long and short dash line shows the hollow sponge rubber 39 in the state where it is not pressed against the damping steel plate 35.

In this way, by using the damping plate 35 as the shielding plate, the vibration transmitted from the sound generation source 33 is blocked and the transmission of engine sound is suppressed.

Further, by using the hollow sponge rubber 39 as the sealing member, the ribs and the like of the engine are also brought into close contact with the irregularities 47 and the engine sound is sealed.

In addition, since the vibration-damping steel plate 35 that suppresses vibration is used as the shielding plate, it is possible to prevent sound generation due to resonance.

Of course, the surface of the hollow sponge rubber 39 is coated with a coating for blocking the permeation of oil or the like, so even if the oil or the like touches the hollow sponge rubber 39, it is not adsorbed,
It is possible to prevent a fire caused by oil or the like.

An injection pump 40 for pressurizing fuel is arranged above the cylinder block 31, as shown in FIG. Below the injection pump 40, a damping steel plate 35, which is formed by bending the outer periphery toward the injection pump 40 side and also serves as the tray 36, is arranged. Further, the tray 36 is shown in FIG. A pipe 42 is arranged as shown.

Therefore, the oil leaked from the injection pump 40 and the oil consisting of the lubricating oil drop onto the damping steel plate 35 which also serves as the tray 36 below, and the oil dropped onto the tray 36 is
Collected in one place by 42.

Then, the leaked oil is prevented from accumulating in the cylinder block 31, and the surface of the hollow sponge rubber 39 is coated with an oil permeation blocking material as described above, so that the leaked oil should come into contact with the sponge rubber 39. However, it is not absorbed and the ignition of the engine can be reliably prevented.

[Effect of device]

As described above, according to the present invention, the sealing member made of the hollow sponge rubber is brought into close contact with the irregularities such as the ribs of the engine, and the shielding plate made of the vibration-damping steel plate prevents the generation of the sound due to the resonance so that the engine sound The noise can be reduced by the leaked oil, and the leaked oil is received by the vibration-damping steel plate shielding plate that doubles as a tray, and the oil is further collected by the pipe. Even if the oil should touch the sealing member, the surface coating As a result, it is possible to prevent the oil from penetrating and reliably prevent the ignition of the leaked oil.

[Brief description of drawings]

1 to 4 show an embodiment of an engine sound insulation cover according to the present invention. FIG. 1 is a side view showing the whole of the present invention, and FIG. 2 is a side view with an injection pump removed. 3 and 4 are enlarged vertical cross-sectional views showing the vicinity of the bolt of FIG. 1, FIG. 4 is a plan view of the engine sound insulation cover with the injection pump removed, and FIG. 5 shows the vicinity of the bolt of the conventional engine sound insulation cover. 6 is a longitudinal sectional view showing
The drawing is a partially enlarged sectional view of the vicinity of the rib in FIG. 31 ... Cylinder block, 33 ... Sound source, 35 ... Damping steel plate, 36 ... Tray, 39 ... Hollow sponge rubber, 40 ...
… Injection pump, 42… pipe.

Claims (1)

[Scope of utility model registration request] 1. An engine sound-insulating cover in which a sound source on a wall surface of a cylinder block of an engine is covered with a shielding plate via a sealing member arranged so as to surround the sealing member, and the surface of the sealing member is a coating for blocking penetration of oil. It is made of hollow sponge rubber that has been subjected to the above, and the shielding plate is made of a damping steel plate that also functions as a tray for leaked oil, the outer periphery of which is bent toward the injection pump, and a pipe for collecting oil is placed on the shielding plate. Engine sound insulation cover featuring.