JPH0511324Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a timing belt cover structure for an engine, and more particularly to a sealing structure for an opening from which a mount bracket fixed to an end face of the engine and supporting the engine on a vehicle body protrudes.

(Prior art) A timing belt cover that externally covers the driven pulley that is attached to the end of the engine and fixed to the end of the valve drive camshaft, the drive pulley that is fixed to the end of the crankshaft, and the timing belt that connects both pulleys. Generally, an opening is provided approximately in the center of the vehicle, and a mount bracket protrudes from the opening that is fixed to the end face of the engine and supports the engine on the vehicle body.

Conventionally, as disclosed in Japanese Utility Model Application No. 59-125647, an opening from which a mount bracket protrudes is formed in an integrated timing belt cover, and a seal rubber is attached to the periphery of this opening from the inside.

Here, to explain the engine mounting method, first, in the engine assembly, the inertia axis that three-dimensionally connects the engine center of gravity and the transmission center of gravity is positive, and the engine assembly is mounted to the vehicle body at both ends on the inertia axis. do. Next, for example, in the case of a horizontally mounted engine, the engine assembly can be mounted at four points at both the front and rear to prevent it from swinging or falling, or the engine assembly can be mounted only at one end on the engine side on its inertia axis. Two methods are usually used: three-point tightening, which involves changing the front and rear mounting positions. Therefore, the engine side end portion, that is, the mount portion on the timing belt cover side is the basic mount portion.

(Problem that the invention aims to solve) By the way, as mentioned above, in the past, an integrated timing belt cover was used, and since it was difficult to remove the timing belt cover when the engine was mounted, the internal pulleys and belt It is difficult to perform partial maintenance, and furthermore, since the seal rubber is attached from the inside to the periphery of the cover opening where the mount bracket protrudes, there is a risk that the seal rubber may fall into the timing belt cover if force is applied from the outside. It was hot.

Therefore, the purpose of this invention is to make the timing belt cover split into parts to facilitate partial maintenance of internal pulleys, belts, etc., and to make it difficult for the sealing member attached to the cover opening from which the mount bracket protrudes to fall off. To provide a timing belt cover structure for an engine which can also increase strength.

(Means for Solving the Problems) In order to solve the above problems and achieve the purpose, the present invention provides a timing belt cover 20 with an upper cover 21 that covers the driven pulley 6 side and a lower cover that covers the drive pulley 7 side. A seal member 30 is installed in the center between the lower end of the upper cover 21 and the upper end of the lower cover 25, and the seal member 30 is fixed to the end face of the engine 2 and has a through hole 42 for a mount bracket 15 that supports the engine on the vehicle body. The sealing member 30
is approximately the cross section L that abuts the inner surface of the periphery of the opening 26
A plate 31 on the outer periphery having a substantially U-shaped cross section 39 which is partially in contact with the outer surface of the periphery of the opening 26, and an elastic body having an outer periphery fixed to the surface of the plate 31 and having the through hole 42. 41.

(Function) Since the timing belt cover 20 is divided into an upper cover 21 and a lower cover 25,
Partial maintenance inside the cover can be easily performed.

Further, the seal member 30 is attached to the mount bracket 15.
Since the periphery of the through hole 42 is made of an elastic body 41, the sealing performance of the through hole 42 is good, and even if there is a slight deviation in the dimensions of the engine and the timing belt cover, the elastic body 41 absorbs it, making it easy to assemble. It is.

The outer periphery of the sealing member 30 has a substantially L-shaped cross section that abuts the inner surface of the periphery of the opening 26 at the center between the lower end of the upper cover 21 and the upper end of the lower cover 25, and also partially touches the outer periphery of the opening 26. Since the elastic body 41 is fixed to the surface of the plate 31 which has a substantially U-shaped section 39 in contact with the plate 31, the plate 3
1, the strength can be increased and positioning can be easily performed, and in particular, the substantially U-shaped cross section 39 of the plate 31 makes it difficult for the seal member 30 to fall off even when force is applied from inside or outside during assembly, operation, etc. become.

(Example) Examples will be described below based on the accompanying drawings.

Figure 1 schematically shows the interior of the engine room of an automobile, in which the engine assembly 1 is placed horizontally and the left side frame (not shown) is viewed from the side of the engine 2.
A mount part 11 on the top surface, a mount part 12 on the rear beam (both not shown) from the clutch case at the rear of the engine 2, and the transmission 10.
It is mounted on the vehicle body by three-point fastening with a mount portion 13 from the front to the lower surface of the right side frame (not shown).

The mount bracket 15 to the mount portion 11 is attached to the engine 2 as shown in FIGS. 2 and 3.
A driven pulley 6 is fixed to the side of the engine 2 with a bolt 16, and a drive pulley 6 is fixed to the end of the valve train camshaft 3, a drive pulley 7 is fixed to the end of the crankshaft 4, and a timing link between the two pulleys is fixed to the side of the engine 2. A belt 8 is disposed and is covered from the outside by a timing belt cover 20 attached to the side of the engine 2, from which the mount bracket 15 protrudes.

First, the timing belt cover 20 consists of an upper cover 21 that covers the driven pulley 6 side that is divided into upper and lower parts, and a lower cover 2 that covers the drive pulley 7 side.
5, and both upper and lower covers have bolts 18 and 1.
9 is attached to the side of engine 2. In particular, an opening 26 that opens upward is formed at the center of the substantially horizontal upper end of the lower cover 25, and the lower edge of this opening 26 is inclined as shown in FIG. A bracket 15 projects through the seal member 30.

The sealing member 30 is made by fixing an elastic body 41 to the surface of a plate 31 shown in FIGS. 4 and 5 by baking as shown in FIGS. 6 and 7.

That is, the plate 31 is made of metal and has an outer periphery larger than the opening 26. Its lower edge is also sloped, and there is a large horizontal window 32 formed along this lower edge, and a substantially horizontal window above the window 32. It has a small triangular window 33 formed between the upper edges. Also, both windows 3
2, 33 peripheral edges have standing peripheral pieces 34, 35 in the same direction.
are formed, and furthermore, an upright circumferential piece 34 on one side and a lower side of the horizontally long window portion 32, and an upstanding circumferential piece 35 on the other side of the triangular window portion 33.
Extending pieces 36, 37, and 38 of approximately the same length are formed from the plate 31 and projecting parallel to both side edges of the plate 31. Therefore, the outer peripheral edge of the plate 31 has a substantially L-shaped cross section that continues substantially uniformly, and is provided with substantially U-shaped cross sections 39 at three locations on both side edges and the lower edge.

Rubber is baked on both sides of the surface of the plate 31 to fix the elastic body 41. The elastic body 41 is thin and has a horizontally long through hole 42 located inside the horizontally long window portion 32, and covers the triangular window portion 33 from the upright circumferential piece 35 side, and the outer peripheral edge of the elastic body 41 is connected to the plate 31. The outer peripheral edge has a substantially L-shaped cross-section and a substantially U-shaped cross-section 49 that is substantially uniform, following the substantially L-shaped cross-section and the substantially U-shaped cross-section 39 .

The seal member 30 formed as described above is attached from above to the opening 26 at the center of the upper end of the lower cover 25 of the timing belt cover 20, that is, the lower edge and both side edges of the U-shaped cross section 49 of the outer peripheral edge of the seal member 30 are attached to the opening 26 at the center of the upper end of the lower cover 25 of the timing belt cover 20. The lower cover 25 is fitted onto the inner and outer surfaces of the periphery of the seal member 26, and the mounting bracket 15 is inserted into the through hole 42 of the elastic body 41 of the seal member 30, and the lower cover 25 is fixed to the side surface of the engine 2 with bolts 19. Furthermore, sealing member 30 seals the center of the lower end of upper cover 21.
Fix the upper cover 21 to the side of the engine 2 with bolts 18 by applying it to the upper edge of the engine 2 from the outside.

Since the timing belt cover 20 was first divided into the upper cover 21 and the lower cover 25 in this way, the upper cover 21 and the lower cover 2
5 can be attached and detached individually,
Therefore, partial maintenance of the inside of the cover can be easily performed.

Further, the seal member 30 is attached to the mount bracket 15.
Since the periphery of the through hole 42 is made of an elastic body 41, the sealing performance between the mount bracket 15 and the through hole 42 is good, and even if there is a slight deviation in the dimensions of the engine and timing belt cover, the elastic body Since the body 41 can absorb the misalignment, it is also easy to assemble.

Moreover, the outer peripheral edge of the sealing member 20 has a substantially L-shaped cross section that abuts the inner surface of the peripheral edge of the opening 26 at the center between the lower end of the upper cover 21 and the upper end of the lower cover 25, and has openings 26 on both sides and the lower edge thereof. Since the elastic body 41 is fixed to the surface of the plate 31, which has a substantially U-shaped cross section 39 that also contacts the outer surface of the edge and the lower edge, the opening 26 formed by the outer peripheral edge of the elastic body 41 is formed.
The strength of the plate 31 can be increased while maintaining the sealing performance, and positioning can be easily performed.

In particular, the substantially U-shaped cross section 39 of the plate 31
This makes it difficult for the seal member 30 to fall off even if force is applied from the inside or outside during assembly, operation, etc.

Here, the outer peripheral edge of the plate 31 excluding the upper end is locked inside the timing belt cover opening 26, only the extending pieces 36, 37, and 38 are locked outside the opening 26, and the upper cover 21 is structured to cover the upper edge of the seal member 30 from the outside. On the other hand, the mount bracket 15 is attached to the engine 2.
It has a shape in which the cross-sectional area decreases from the side toward the tip, and when inserting the mount bracket 15 into the through hole 42 of the elastic body 41, the seal member 30
A force is generated that presses the timing belt cover 20 toward the timing belt cover 20 side. Conventionally, the sealing member was held only by this force, but according to this structure, the plate 31 is held by the timing belt cover 20 mainly due to this force.
Since the sealing member 30 is located inside the opening 26, the sealing member 30 can be held well in the opening 26.

The opening 26 may also be formed at the center of the lower edge of the upper cover 21, and its shape may be arbitrary.

(Effect of the invention) As described above, according to the invention, the timing belt cover is divided into an upper cover and a lower cover, and in particular, the engine mount bracket at the center between the lower end of the upper cover and the upper end of the lower cover protrudes from the sealing member. It is formed by fixing an elastic body to the plate surface of the outer periphery, which has a roughly L-shaped cross section that abuts the inner surface of the periphery of the opening, and a portion that has a roughly U-shaped cross section that also comes into contact with the outer surface of the periphery of the opening. This makes it easier to perform partial maintenance of the pulleys, belts, etc. inside the timing belt cover, makes it difficult for the seal member attached to the cover opening where the mount bracket protrudes, and also increases the strength of the seal member. It can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the inside of the engine room of an automobile, Fig. 2 is a vertical cross-sectional front view of the timing belt cover portion at the end of the engine, Fig. 3 is an exploded perspective view of its main parts, and Fig. 4 is a plate of the sealing member. front view,
Figure 5 a, b and c are cross-sectional views taken along line A-A in Figure 4 and B.
A direction arrow view and a C direction arrow perspective view, FIG. 6 is a front view of the seal member, and FIGS. 7 a, b, and c are FIG. 6 A-
It is each sectional drawing of the A line, the BB line, and the CC line. In addition, in the drawing, 2 is the engine, 3 is the valve camshaft,
4 is a crankshaft, 6 is a driven pulley, 7 is a drive pulley, 8 is a timing belt, 15 is a mount bracket, 20 is a timing belt cover, 21 is an upper cover, 25 is a lower cover, 26 is an opening, 30 is a seal 31 is a plate; 39 is a substantially U-shaped section; 41 is an elastic body;
42 is a through hole.

Claims (1)

[Claims for Utility Model Registration] Externally covers the driven pulley attached to the end of the engine and fixed to the end of the valve train camshaft, the drive pulley fixed to the end of the crankshaft, and the timing belt connecting both pulleys. In the timing belt cover, the timing belt cover is divided into an upper cover that covers the driven pulley side and a lower cover that covers the drive pulley side, and is fixed to the engine end face in the center between the lower end of the upper cover and the upper end of the lower cover. An opening is formed in the vehicle body for mounting a seal member having a through hole for a mount bracket that supports the engine, and the seal member has a substantially L-shaped cross section and partially abuts against the inner surface of the periphery of the opening. An engine comprising: a plate having an outer periphery having a substantially U-shaped cross section that also contacts the outer surface of the periphery of the opening; and an elastic body having an outer periphery fixed to the surface of the plate and having the through hole. Timing belt cover structure.