JP2529170Y2 - Timing belt cover drain structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a drain structure of a timing belt cover for protecting a timing belt mechanism of an engine.

[Conventional technology]

In an engine of an automobile or the like, a timing belt cover 1 as shown in FIG. 6 is provided to protect a timing belt mechanism. Timing belt cover 1
Is provided with a rib on the engine body 2, and is fixed to the rib by a bolt 3 or the like via a sealing member (gasket). Conventionally, the following is performed in order to discharge water accumulated in the timing belt cover. A notch is provided at the lower end of the rib provided on the engine body, and water collected in the timing belt cover 1 is discharged therefrom. In addition, the present applicant cuts out a part of the flange portion at the lower end of the timing belt cover 1 and bulges it to form the notch 4 and the bulging portion 5 as shown in FIG. 7, and as shown in FIG. A gap is provided between the timing belt cover 1 and the seal member 6 to drain water that accumulates in the timing belt cover 1 as a drain hole 7, and the drainage path is bent, so that foreign matter is contained in the timing belt cover. Has proposed a drainage structure for the timing belt cover that makes it harder for water to enter (not announced). In the figure, reference numeral 8 denotes a rib provided on the engine body 2, and arrows indicate drainage paths. FIG. 9 shows a front view of the flange portion of the apparatus shown in FIG.

Japanese Utility Model Laid-Open Publication No. Sho 59-170641 discloses a timing belt cover device having a drain hole.

[Problems to be solved by the invention]

In the above-described conventional example, when the notch is provided in the rib of the engine body, foreign matter easily enters the timing belt cover 1 from the notch. Then, when foreign matter enters the timing belt cover 1, there is a problem that the wear of the timing belt is accelerated and the durability is adversely affected. 7 to 9 of the present applicant have a structure in which the drainage path is bent so that foreign matter does not easily enter the timing belt cover 1. Inside, there are many scattered and floating substances due to mud jumps of the tires and wind entrainment during running, so the dustproof effect is not sufficient, and there is a problem as in the above-mentioned conventional example.

Also disclosed in Japanese Utility Model Laid-Open No. 59-170641, the dustproof effect is the same as the above conventional example,
There is a problem as well.

In view of the above, an object of the present invention is to provide a drainage structure for a timing belt cover having a sufficient dustproof effect.

[Means for solving the problem]

In order to solve the above problem, the present invention forms a groove along an edge of a flange provided on an outer peripheral portion of a timing belt cover main body, and fits a sealing member having a substantially constant cross-sectional shape into the groove. A timing belt cover drainage structure in which the timing belt cover main body is attached to the engine main body via the seal member, wherein the timing belt cover main body has a lower end than the groove at an edge of the flange portion at a lower end portion of the timing belt cover main body. A deep notch is provided, and a drain hole is formed between the notch and the seal member to allow communication between the inside and the outside of the timing belt cover body, and an edge of the flange portion bulges outward to face the drain hole. A swelling portion is formed integrally with the timing belt cover main body, and a baffle plate disposed inside the flange portion and facing the drain hole is provided with the timing. Characterized by providing a grayed belt cover body integrally.

[Action]

Since the device according to the present invention is configured as described above, water collected in the timing belt cover is discharged to the outside through a drain hole formed by a notch and a seal member at a lower end portion of the timing belt cover body. At this time, foreign substances that try to enter the timing cover from outside
Since the passage is bent into a labyrinth shape by the seal member, the bulging portion and the baffle plate, it is difficult to reach the inside of the timing belt cover.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In FIG. 1, reference numeral 1 denotes a timing belt cover (timing belt cover main body), and a groove 9 is formed in an outer peripheral flange portion.
(FIG. 3), a seal member 6 having a substantially constant cross-sectional shape is fitted into the groove 9. A rectangular notch 4 (FIG. 3) is provided in a lower end flange portion of the timing belt cover 1.
A bulging portion 5 is formed in a portion of the notch 4 facing the outside of the timing belt cover 1, and a drain port 10 is formed by the bulging portion 5 and the seal member 6. The notch 4 is deeper than the groove 9, and a gap is formed between the seal member 6 and the bulging portion 5 to form a drain hole 7. A baffle plate 11 is provided facing an opening of the notch 4 facing the inside of the timing belt cover 1. Baffle plate 11
1 is provided on the timing belt cover 1 as shown in FIGS. 1 to 3 and is opened only in one direction perpendicular to the direction of the drain hole 7, and a path leading to the inside and outside of the timing belt cover 1. To meander. Alternatively, the baffle plate 11 may be provided on the engine body 2 as shown in FIG.
And the timing belt cover 1. Further, it may be provided outside the timing belt cover 1.
Reference numeral 8 denotes a rib (FIG. 4) arranged in a shape conforming to the flange shape of the timing belt cover 1. The timing belt cover 1 is fixed to the timing belt cover 1 via a sealing member 6 with bolts (not shown). FIG. 2 is a front view of a flange portion of a main part of the timing belt cover 1 of FIG. 1, and FIG. 3 is a perspective view thereof. FIG. 4 shows a part of the arrangement of the ribs 8 provided on the engine body 2. In the figure, reference numeral 12 denotes a crank pulley.

Next, the operation of the present embodiment configured as described above will be described.

Water accumulated in the timing belt cover 1 passes through the opening of the baffle plate 11 and the drain hole 7, and is discharged from the drain port 10 to the outside of the timing belt cover 1. The arrow in the figure indicates the drain path of the water collected in the timing belt cover 1. A path communicating with the inside and outside of the timing belt cover 1 is bent by the swelling portion 5 and the sealing member 6 and the baffle plate 11 that act in the same manner as the baffle plate,
Since it is in a labyrinth state, a foreign substance that is going to enter the timing belt cover 1 changes its invasion direction during entry, so that the penetration speed is reduced and it is difficult for the foreign substance to reach the inside of the timing belt cover 1. The drain hole 7 is
Since the cutout 4 is formed between the cutout 4 and the seal member 6 that fits in the groove 9 and crosses the cutout 4, there is no need to provide a hole or cutout in the seal member 6 to form a drainage hole. Since there is no need for alignment, assembly can be performed easily. Further, the bulging portion 5 and the baffle plate 11
Is provided integrally with the timing belt cover 1, so that the number of parts does not increase.

[Effect of the invention]

According to the timing belt cover draining structure according to the present invention, the water collected in the timing belt cover is discharged to the outside through a drain hole formed by a notch and a seal member at the lower end of the timing belt cover body. .
At this time, foreign substances that are going to enter the timing cover from the outside hardly reach the inside of the timing belt cover because the passage is bent by the seal member, the bulging portion and the baffle plate to form a labyrinth. In addition, the durability of the timing belt can be improved by preventing entry of foreign matter.

Further, since the drainage hole is formed between the notch and the seal member that fits in the groove and crosses the notch, a seal member having a substantially uniform cross-sectional shape can be used, and a seal is formed to form the drainage hole. There is no need to provide holes or notches in the member,
Since there is no need for the alignment, assembly can be performed easily. Further, since the bulging portion and the baffle plate are provided integrally with the timing belt cover main body, the number of components does not increase.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a front view of a main part of a flange portion of a timing belt cover of the apparatus of FIG. 1, and FIG. 3 is a view excluding a gasket of FIG. FIG. 4 is a front view showing the arrangement of ribs provided on the engine body of the apparatus shown in FIG. 1, FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention, and FIG. FIG. 7 is a front view showing a timing belt cover attached to the main body, FIG. 7 is a perspective view showing a main part of a conventional timing belt cover draining structure, and FIG. 8 is a longitudinal sectional view of a conventional timing belt cover draining structure. FIG. 9 is a front view of a main part of a flange portion of the timing belt cover of the apparatus shown in FIG. DESCRIPTION OF SYMBOLS 1 ... Timing belt cover 2 ... Engine body 6 ... Seal member 7 ... Drainage hole 8 ... Rib 11 ... Baffle plate

Claims (1)

(57) [Scope of request for utility model registration] A timing belt cover is formed by forming a groove along an edge of a flange portion provided on an outer peripheral portion of the timing belt cover body, and fitting a sealing member having a substantially constant cross-sectional shape into the groove. A timing belt cover drainage structure adapted to be attached to an engine body via a seal member, wherein a notch deeper than the groove is provided at an edge of the flange portion at a lower end of the timing belt cover body. A water drain hole communicating between the inside and the outside of the timing cover main body between the timing belt cover and the sealing member, and bulging an edge portion of the flange portion outward to form a swelling portion facing the water drain hole with the timing belt cover. Formed integrally with the body,
A timing belt cover drainage structure, further comprising a baffle plate disposed inside the flange portion and facing the drainage hole, integrally provided with the timing belt cover body.