JPH0455224Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cooling water outlet structure for a vertical engine.

(Prior Art) Water-cooled cooling devices are generally used in many engines. This water-cooled cooling system uses a water pump to circulate cooling water in a water jacket around the cylinder for cooling. In some cases, a configuration is adopted in which the cooling water in the water jacket is guided to a radiator, cooled by heat radiation, and then returned to the engine side.

For this purpose, the cooling water outlet of the water jacket of the engine and the cooling water inlet of the radiator are connected by a cooling water passage such as a suction pipe. A timing belt as part of the valve mechanism is installed on one end (in the axial direction).
Since the timing belt is provided with a tamming belt cover whose back side is closed by a seal plate, a cooling water outlet is usually formed at the opposite end of the tamming belt cover, and the above-mentioned cooling water passage is connected to the timing belt. was adopted (for example, see Utility Model Application Publication No. 60-28217).

(Problem that the invention seeks to solve) However, if an FR type drive system were adopted for a vertically mounted engine in which the engine crankshaft is placed in the longitudinal direction of the vehicle body, for example, if an FR type drive system were adopted, the above-mentioned cooling water outlet would be It is inevitably located at the rear end of the engine (driver's seat side), while the radiator is usually installed at the front end of the vehicle body, so the cooling water passage connecting the cooling water outlet and the radiator is There is a problem that the length becomes considerably long.

Therefore, a cylindrical cooling water outlet member is provided on the front end side of the engine, passing through each of the timing belt cover and seal plate, and being connected and fixed to the cooling water outlet of the cylinder head via a mounting flange. A conceivable configuration is to shorten the above-mentioned cooling water passage by providing a water outlet member) and connecting the cooling water passage to the outer end of the cooling water extraction member.

However, if such a configuration is adopted, the cylindrical cooling water extraction member will be connected to the cylinder head in an overhanging state.
If the cylinder head is simply fastened and fixed to the cylinder head using a mounting flange, its supporting strength is insufficient and vibrations due to engine vibration are likely to occur, and in some cases, the sealing function of the connection may be damaged, resulting in water leakage. There is a fear.

Further, the vibration causes rattling in the timing belt cover and the seal plate penetrating portion, causing an increase in noise.

Furthermore, due to the presence of the two penetration portions, the sealing performance within the timing belt cover may be impaired and dirt may enter the timing belt cover, thus creating new problems such as the need to take some countermeasures.

(Means for solving the problem) The present invention was made with the aim of solving the above problem, and includes a timing belt cover attached to the front side of the cylinder head and a In a vertically mounted engine having an integrated seal plate that seals the inside of the timing belt cover, and in which the axial direction of the crankshaft is arranged in the longitudinal direction of the vehicle body, one end side base is the water jacket part of the cylinder head. A cylindrical cooling water extraction member is provided which is attached to the cooling water extraction member via a mounting flange and whose other end side connection port penetrates both the seal plate and the timing belt cover and protrudes outward. Ribs of a predetermined shape for support are formed at the bottom of each of the seal plate side penetration part and the timing belt cover side penetration part, and a seal member is interposed between each of these ribs and the corresponding seal plate and timing belt cover. At the same time, the rib on the seal plate side and the mounting flange are connected and reinforced by a connecting rib.

(Function) According to the above means, supporting ribs are provided in each of the penetration parts of the cylindrical cooling water extraction member to the timing belt cover and the seal plate, and each of the ribs is connected to the timing belt cover and the seal plate through the sealing member. It is fitted into the corresponding through hole.

Therefore, the outer end of the overhanging cooling water outlet member is stably supported at two locations, the timing belt cover side and the seal plate side, without wobbling, and the cylinder head is supported by the base end mounting flange. In combination with the fixation to, sufficient support strength can be obtained.

Furthermore, in the above case, since the rib on the seal plate side is connected and reinforced by the connecting rib to the mounting flange fixed to the cylinder head on the lower side, the supporting rigidity of the seal plate itself is also improved. Even if the weight and overhang of the cooling water extraction member become considerably large, a sufficiently stable mounting state can be obtained.

(Embodiment) FIGS. 1 to 4 show a structure of a cooling water outlet for a vertical engine according to an embodiment of the present invention.

First, in FIG. 1, reference numeral 1 denotes an engine body consisting of a cylinder block 2 and a cylinder head 3. Inside the cylinder block 2 and cylinder head 3 of the engine body 1 is a cylinder 4A.
-4D are provided with water jackets 5a-5e located on the outer periphery and communicating with each other. The water jackets 5a to 5e are connected to a cooling water supply port from a radiator at one end, and to a cylindrical cooling water extraction member 6 at a cooling water extraction port 20 at the other end. A water pump 12 is installed.

On the other hand, numerals 10 and 10 refer to the engine main body 1
The rotation of the camshafts 10, 10 operates the corresponding intake/exhaust valves 7, 8 of the cylinders 4A to 4D at predetermined crank angle timing. The camshaft 10, 10
Camshaft-side timing pulleys 11, 11 are fixed to the front end of the engine, and the camshaft-side timing pulleys 11, 11 are connected to the crankshaft 15 via a timing belt 13.
It is designed to be driven by a drive-side timing pulley 16 on the side.

Note that 21 is a pulley on the water pump 7 side, and 22 is a pulley on the crankshaft side that drives the water pump 12 via the V-belt 23.

The timing belt 13 is covered with a timing belt cover 18 from the outside, and a seal plate 19 is attached to the back side of the timing belt cover 18. As shown in detail in FIG. 2, the timing belt cover 18 includes a wide first cover member 181 that covers the pair of camshaft side timing pulleys 11, 11 of the cylinder head 2, and the first cover. The water pump 12 is located below the member 181.
Side pulley 21 part and crankshaft 15
The second side covers the drive side timing pulley 16 part.
The second cover member 182 further includes an intermediate member 182a located in the middle and a lower member 18 located on the lower side.
It is divided into two types: 2b and 2b.

On the other hand, the seal plate 19 corresponding to the timing belt cover 18 having such a configuration is a single piece continuous over the entire cylinder head 2 of the engine body 1, corresponding to the shape of the first cover member 181. It is composed of flat plate members. First, the first cover member 181 is integrated with the seal plate 19 using the bolts 2.
5, 25... (However, only one is shown and the others are omitted)
It is assembled by.

Further, the intermediate member 18 of the second cover member 182
2a and the lower member 182b have bolts 26, 26, . . . attached to the cylinder block side front wall 2A, respectively.
It is directly fixed and installed via the

By the way, the cooling water extraction member 6 is shown in FIGS.
As is clear from FIG. 3, it has a mounting flange 6A on its base end side, and is connected and fixed to the cooling water outlet portion 20 of the cylinder head 3 in an overhanging state by the flange 6A. The outer end side of the connection port 14 with the suction pipe extends through the seal plate 19 and the timing belt cover 18, respectively, and projects toward the radiator. Further, at the lower part of the cylindrical body of the cooling water extraction member 6, there are first and second substantially triangular shaped first and second cylindrical bodies located at the fitting portions for the seal plate 19 and the timing belt cover 18 to support the cylindrical body. Ribs 6B and 6C are formed (see all drawings in FIGS. 1 to 4).

On the other hand, on the seal plate 19 side and the timing belt cover 18 side, the cylindrical cooling water outlet member (water outlet member) 6 is provided.
First and second fitting holes 31 and 32 are respectively formed to engage with the cylindrical body part in the assembled state in order to fit and support the cylindrical body part as described above. First, the first fitting hole 31 formed in the seal plate 19 is fitted with the convex surface portion 9 on the upper surface side of the cylindrical body portion of the cooling water extraction member 6, as shown in detail in FIG. Semicircular concave groove surface 2
8, and the first rib 6B is fitted and supported between the upper side edge 12A of the housing of the water pump 12 installed on the lower side thereof,
An arc-shaped first seal rubber 41 is provided between the upper convex surface portion 9 of the cooling water extraction member 6 and the concave groove surface 28 of the seal plate 19, and between the first rib 6B and the water pump 12. upper edge of the housing 1
2A is a second longitudinal seal rubber 42.
are interposed respectively.

Next, the second timing belt cover 18 side
The fitting hole 32 is formed by cutting out the center of the lower side of the first cover member 181 and forming a semicircular recessed groove surface 35, which is substantially the same as that described above, on the second cover member 181.
The recessed groove surface 35 on the first cover member 181 side faces the upper surface 36 of the intermediate member 182a on the first cover member 182 side, thereby forming a substantially semicircular hole shape. The cooling water take-out member 6 is fitted in by facing the upper surface convex portion 37 of the cooling water take-out member 6 via a third seal rubber 43, and the upper surface 36 of the intermediate member 182a side faces the lower surface of the second fitting hole 32 via a fourth seal rubber 44.

Therefore, the cylindrical portion of the cooling water extraction member 6 connects to the upper edge 12A of the housing of the water pump 12 via the first rib 6B provided on the lower side thereof.
In addition, the second cover member 182 is stably supported by the upper surface 36 of the intermediate member 182a via the second rib 6C, and each of the supporting parts is supported by the first and the second
Since the seal rubbers 41 and 42 and the third and fourth seal rubbers 43 and 44 are interposed therebetween and are securely fitted, both sealing performance and vibration absorption performance are sufficient.

Further, as shown in detail in FIG. 3, the first rib 6B located on the side of the seal plate 19 is attached to the base end side via a connecting rib 45 that extends in the axial direction and has a sufficient width in the vertical direction. While integrally connected to the mounting flange 6A, the mounting flange 6A
Reinforcing ribs 46 are attached to the upper corner portions. Therefore, the supporting rigidity in the vertical direction of the cooling water extraction member 6 installed in the overhanging state by the connecting ribs 45 and the reinforcing ribs 46 is sufficient in itself, and almost no vibration occurs. This, together with the above-mentioned disadvantage, makes it possible to provide extremely stable support.

(Effects of the invention) As explained above, the present invention consists of a timing belt cover attached to the front side of the cylinder head, and a seal plate that is integrated on the back side of the timing belt cover and seals the inside of the timing belt cover. In a vertically mounted engine in which the axial direction of the crankshaft is arranged in the longitudinal direction of the vehicle body, one end side base is attached to the water jacket part of the cylinder head via a mounting flange, and the other end side is connected. A cylindrical cooling water extraction member whose mouth portion penetrates both the seal plate and the timing belt cover and protrudes outward is provided, and the cooling water extraction member has a penetration portion on the seal plate side and a penetration portion on the timing belt cover side. A rib of a predetermined shape for support is formed at the bottom of each,
Seal members are interposed and supported between each of these ribs and the corresponding seal plate and timing belt cover, while the ribs on the seal plate side and the mounting flange are connected and reinforced by connecting ribs. It is characterized by:

That is, according to the present invention, each of the penetration parts of the cylindrical cooling water extraction member with respect to the timing belt cover and the seal plate is provided with a supporting rib, and each of the ribs is provided with a corresponding penetration part through the seal member. It is fitted into the hole.

Therefore, the outer end of the overhanging cooling water outlet member is stably supported at two locations, the timing belt cover side and the seal plate side, without wobbling, and the cylinder head is supported by the base end mounting flange. In combination with the fixation to, sufficient support strength can be obtained.

Furthermore, in the above case, since the rib on the seal plate side is connected and reinforced by the connecting rib to the mounting flange fixed to the cylinder head on the lower side, the supporting rigidity of the seal plate itself is also improved. Even if the weight and overhang of the cooling water extraction member become considerably large, a sufficiently stable mounting state can be obtained.

Therefore, problems that could be expected in the past, such as low support rigidity, water leakage due to poor sealing function of the connecting part, intrusion of dirt, etc. due to poor sealing performance of the timing belt cover penetration part, and looseness, etc., are definitely eliminated. This has been resolved, and even in the case of a vertically mounted engine that uses the FR system, it will be possible to install the cooling water passage to the radiator in the shortest possible distance without any problems.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the structure of a cooling water outlet of a vertical engine according to an embodiment of the present invention, and FIG.
FIG. 3 is an exploded perspective view of the main parts of the same structure, FIG. 3 is an enlarged sectional view of the main parts of the same structure, and FIG. 4 is a front view of the main parts of the same structure. DESCRIPTION OF SYMBOLS 1... Engine body, 2... Cylinder block, 3... Cylinder head, 4A to 4D... Cylinder, 5a to 5e... Water jacket, 6...
...Cooling water extraction member, 6A...Mounting flange, 6
B...first rib, 6C...second rib, 9...
Convex portion, 10...Camshaft, 11...Camshaft side timing pulley, 12...Water pump, 13...Timing belt, 14...Connection port, 15...Crankshaft, 16...Drive side timing pulley, 18 ...Timing belt cover, 19...Seal plate, 20...Cooling water outlet portion, 28...Concave groove surface, 31...First fitting hole, 32...Second fitting hole, 35... ...concave groove surface,
41...First seal rubber, 42...Second seal rubber, 43...Third seal rubber, 44
...Fourth seal rubber, 45...Connection rib, 4
6... Reinforcement rib, 181... First cover member,
182...second cover member, 182a...intermediate member, 182b...lower member.

Claims (1)

[Scope of utility model registration request] The cylinder head is equipped with a timing belt cover attached to the front side of the cylinder head, and a seal plate integrated on the back side of the timing belt cover to seal the inside of the timing belt cover. In the vertically mounted engine, the base on one end is attached to the water jacket of the cylinder head via a mounting flange, and the connection port on the other end passes through both the seal plate and the timing belt cover to the outside. A cylindrical cooling water extraction member protruding in the direction is provided, and ribs of a predetermined shape for support are formed at the lower part of each of the seal plate side penetration part and the timing belt cover side penetration part of the cooling water extraction member, and these Seal members are interposed and supported between each rib and the corresponding seal plate and timing belt cover, while the rib on the seal plate side and the mounting flange are connected and reinforced by a connecting rib. Features a cooling water outlet structure for vertically mounted engines.