JPS6231638Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sealing device for a timing belt cover of an automobile engine, and in particular, a sealing device for sealing a timing belt cover and an engine mounting bracket that penetrates the timing belt cover and protrudes from a cylinder block. The present invention relates to a sealing device.

Timing belt covers for automobile engines need to prevent water, dust, pebbles, etc. from entering from the outside in order to protect the internal timing belt. On the other hand, in the horizontally mounted engine of a front-engine, front-drive car, the engine mounting bracket that supports the engine body on the vehicle passes through the timing belt cover, so water etc. cannot enter through the opening in the timing belt cover for passing through the engine mounting bracket. It is expected that the opening will be sealed between the timing belt cover and the engine mounting bracket.

In order to meet this demand, an object of the present invention is to provide a sealing device that seals between a timing belt cover and an engine mounting bracket.

In order to achieve this object, in the timing belt cover sealing device of the present invention, the engine mounting bracket that passes through the timing belt cover opening is formed with a rib that extends opposite to the periphery of the opening. An elastic gasket is provided at a portion corresponding to the periphery of the opening of the timing belt cover, and the gasket is pressed against the rib when the timing belt cover is attached to the engine body. With this structure, the gasket comes into close contact with both the timing belt cover and the rib while being compressed and deformed, thereby sufficiently sealing the gap between them.

Hereinafter, preferred embodiments of the timing belt cover sealing device of the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of the sealing device of the present invention. In the figure, 1 is an engine body placed horizontally with respect to the vehicle traveling direction, and a timing belt 5 is installed between the timing pulley 3 fixed to the crankshaft 2 and the camshaft timing pulley on the front side of the engine body 1. Timing belt covers 6, 7, and 8 are attached to the engine body 1 in a three-part structure so as to cover the timing belt 5. These timing belt covers 6, 7, and 8 are made of heat-resistant synthetic resin. Furthermore, an engine mounting bracket 10 for suspending the engine is attached to the front surface of the cylinder block 9 of the engine body 1 and protrudes through the timing belt cover. The front part of the engine, to which an engine mounting insulator is attached, is suspended. This engine mounting bracket 10 is designed to pass through the timing belt cover at the joint between the timing belt covers 6 and 7, and a substantially rectangular opening 11 is formed at the joint between the timing belt covers 6 and 7. has been done. The shapes of the timing belt covers 6 and 7 in this opening 11 are formed such that the joint portion thereof divides the opening 11 into upper and lower halves.

The timing belt cover penetration portion of the engine mounting bracket 10 has a convex portion formed integrally with the engine mounting bracket 10 and extending outward from the engine mounting bracket 10 to a position facing the peripheral edge 11a of the opening 11. A carved rib 12 is provided around the entire outer circumference of the engine mounting bracket 10. The rib 12 is formed such that its surface opposite to the cylinder block 9 is parallel to the peripheral edge 11a, and its outer edge is approximately rectangular.

Opening 1 of the timing belt covers 6 and 7
1 is formed into a rectangular shape. The cover structure near the opening 11 has bent portions 15 and 16 that extend in the direction opposite to the cylinder block 9, and further bent portions 13 and 14 that extend in the direction of the engine mounting bracket 10.
The bent portions 13 and 14 form a peripheral edge 11a of the opening 11 extending parallel to the rib 12. A bent portion 1 of the timing belt covers 6 and 7 extending in the direction opposite to the cylinder block 9
A gap is provided between the ribs 5 and 16 and the outer peripheral end surface of the rib 12, and a gap is also provided between the end surface of the bent portions 13 and 14 and the engine mounting bracket 10. In addition, the bent portion 13,
14, that is, the cylinder block 9 of the peripheral portion 11a.
A gap is also provided between the side surface of the rib 12 and the surface of the rib 12 opposite to the cylinder block 9, and these gaps allow the mounting between the engine mounting bracket 10 and the timing belt cover 6, 7. Even if there are errors, they do not interfere with each other.

The peripheral edge portion 11a of the timing belt covers 6 and 7, which is made up of the vertically bent portions 13 and 14, includes:
An elastic gasket 17 is integrally attached to the surface facing the rib 12. gasket 1
For the material 7, a material having a large permissible rate of elastic deformation, such as sponge, is used. The gasket 17 is provided at the peripheral edge 11a of the opening 11 of the timing belt covers 6, 7, and in this embodiment, the gasket 17 is also divided into two parts according to the divided structure of the timing belt covers 6, 7. Each gasket 17 is adhered to the inner surface of the corresponding timing belt cover 6, 7 with double-sided tape or the like. The overlapping portion of the gasket 17 attached to the timing belt cover 6 and the gasket 17 attached to the timing belt cover 7 is such that each gasket 17 has a small thickness, and when overlapped, the thickness of the gasket 17 of the other portion is small. It is made to have the same thickness. Note that the gasket 17 is attached to the rib 12 of the mounting bracket 10.
It may be attached in advance. The gap between the peripheral edge 11a of the timing belt covers 6, 7 and the rib 12 is set to a dimension that is smaller than the free thickness of the gasket 17 when the timing belt covers 6, 7 are attached to the engine body 1. ing.
In this embodiment, the free thickness of the gasket was set to 7 mm, and the gap between the timing belt covers 6, 7 and the rib 12 was set to 4 mm.

In the timing belt cover sealing device of the present invention having the above configuration, when the timing belt covers 6 and 7 are attached to the engine body 1, the gasket 17 attached to the timing belt covers 6 and 7 is attached to the rib 12. The gasket is compressed from its free thickness to the size of the gap between the timing belt covers 6, 7 and the rib 12.
At this time, the gasket 17 deforms sufficiently within its elastic limit because the allowable deformation rate of the gasket itself is large.
In addition, since the amount of compression deformation is set to be sufficiently large, the timing belt covers 6 and 7 come into close contact with both the inner surfaces and the rib 12 surface, and the gap therebetween is sufficiently sealed.

Further, the material of the gasket 17 is selected to have a sufficiently large allowable deformation rate against elastic deformation, and a sufficient compression allowance is set for the gasket 17, so that the timing belt cover 6 in the thickness direction of the gasket 17 is , 7 and the ribs 12 are sufficiently absorbed. Furthermore, variations in the vertical dimensions are also caused by the edges of the ribs 12 and the horizontal bent portions 1 of the timing belt covers 6 and 7.
5 and 16, sufficient absorption is achieved. Therefore, even if there is slight variation in the dimensions of the engine mounting bracket 10 and the timing belt covers 6, 7 due to molding or installation, the seal between the timing belt covers 6, 7 and the engine mounting bracket 10 will be maintained. Performance is not compromised.

As described above, when using the timing belt cover sealing device of the present invention, an elastic gasket is interposed between the rib provided on the engine mounting bracket and the timing belt cover, and the gasket is inserted between the rib and the timing belt cover. Since we decided to seal by compressing and deforming, we can completely seal the gap between the engine mounting bracket and the timing belt cover, thereby extending the life of the timing belt and making engine operation safer. You can get the effect that you can.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the timing belt cover sealing device of the present invention, and FIG. 2 is a partial vertical cross-sectional view of the device shown in FIG. 1 taken along the line -. 1... Engine body, 5... Timing belt, 6, 7, 8... Timing belt cover, 9
...Cylinder block, 10...Engine mounting bracket, 11...Opening, 11a...
... Peripheral portion, 12... Rib, 13, 14... Vertical bent portion, 15, 16... Horizontal bent portion, 17... Gasket.

Claims (1)

[Scope of utility model registration request] An engine mounting bracket extending through the opening of the timing belt cover is provided with a rib extending opposite to the periphery of the opening, and an elastic gasket is provided at a portion of the timing belt cover corresponding to the periphery of the opening. A sealing device for a timing belt cover, characterized in that the gasket is pressed against the rib when the timing belt cover is attached to the engine body.