JP4706329B2 - Outboard motor cooling water passage cleaning device - Google Patents

Description

  The present invention relates to a cooling water passage cleaning device in an outboard motor equipped with a water-cooled engine covered with an engine cover.

  Generally, a cooling water passage through which seawater flows is disposed inside the outboard motor. In order to prevent salting in the cooling water passage, it is necessary to wash the passage with water. As a device for simplifying cleaning, a device in which a bypass passage is provided in a cooling water passage and a garden hose or the like for supplying fresh water can be connected to the end of the bypass passage has become widespread.

  By the way, when a ship is stored, it may be stored on the land or moored on the water. For this reason, there are two methods for the user to land the ship and to perform it on the water in order to clean the cooling water passage of the outboard motor.

JP-A-1994-191478 JP-A-1995-269345

  However, in the conventional outboard motor, the connection port of the washing hose has only one of the lower side and the rear side. For this reason, it is good to wash from the outside of the ship when the ship is landed, but when washing from inside the ship, such as moored on the water, in the outboard motor where the connection port of the washing hose is below It is difficult to wash with water because the connection port is away from the ship. These problems become more prominent as the outboard motor becomes larger.

  Also, the external flush hose connecting port is installed by protruding from the rear part of the outboard motor cover (Patent Document 1), or the hose is pulled out from the inside of the outboard motor and installed (Patent Document 2). )It has been known. However, there is a possibility that fishing line or the like may get tangled in the hose connection part protruding from the outboard motor cover or the hose exposed to the outside, and the part protruding from the cover is conspicuous and it is difficult to obtain an external flash surface feeling. There are problems such as.

  In view of such circumstances, an object of the present invention is to provide a cooling water passage cleaning device for an outboard motor that is excellent in use and handling properties and can guarantee a good appearance.

A cooling water passage cleaning apparatus for an outboard motor according to the present invention is a cooling water passage cleaning apparatus for an outboard motor equipped with a water-cooled engine covered with an engine cover composed of an upper cover and a lower cover that can be divided vertically. The lower cover includes a front cover fixed to the front portion of the engine and a pair of side covers fixed to both sides of the engine, and collects exhaust gas discharged from the exhaust port and guides it downward. An exhaust passage is provided on one side of the engine, a cleaning water inlet is provided at the end of the front cover on the same side as the exhaust passage, and the cleaning water inlet and the cooling water passage of the engine are connected via a connecting hose. And connected.

  Further, in the cooling water passage cleaning apparatus for an outboard motor according to the present invention, an intake device is disposed on a side surface of the engine, and the cleaning water introduction port is provided at an end portion of the front cover on the same side as the intake device. It is characterized by.

  Further, in the cooling water passage cleaning apparatus for an outboard motor according to the present invention, the lower cover includes a front cover fixed to a front portion of the engine and a pair of side covers fixed to both sides of the engine, The cleaning water inlet is provided at the front portion of the side cover where the cable inlet is not provided.

  Further, in the cooling water passage cleaning apparatus for an outboard motor according to the present invention, a plug that closes the cleaning water inlet when not being cleaned is attached, and a recessed portion having a depth that does not protrude from the surface of the lower cover. The cleaning water introduction port is formed on the bottom surface of the recess.

  Further, in the cooling water passage cleaning apparatus for an outboard motor according to the present invention, a second provided in the rear part of the outboard motor accessible from the outside of the ship, separately from the cleaning water inlet provided in the front surface of the lower cover. A cleaning water inlet is provided.

  According to the present invention, in a typical embodiment, the front cover has two cleaning water inlets and two second cleaning water inlets at the rear of the outboard motor. Accessible from both inside and outside of the ship, it is easy and appropriate to clean the cooling water passage when the ship is moored and landed, and it is extremely convenient to use properly as needed. ing. In particular, by providing the cleaning water inlet using the front cover, the connection hose can be left as it is even during maintenance.

  The cleaning water introduction port is provided in the front cover on the same side as the exhaust passage. Since there is no possibility of interference with the throttle cable or the like, it is advantageous in terms of assembly. Also, because the outboard motor coolant is guided to the engine along the exhaust passage, connecting the connection hose in the middle of the coolant passage makes the connection hose shorter and easier to route. become.

A preferred embodiment of an outboard motor coolant passage cleaning apparatus according to the present invention will be described below with reference to the drawings.
FIG. 1 is a left side view showing an example of the overall configuration of an outboard motor 100 according to the present invention, and FIG. 2 is a front view of the outboard motor 100. In these drawings, the arrow Fr is the front side of the outboard motor 100 (the forward direction of the hull S equipped with the outboard motor 100), and the arrow Rr is the rear side of the outboard motor 100 (the outboard motor 100 is equipped). Respective hull S reverse direction) side. In this case, the outboard motor 100 is fixed to the rear plate P (transom board) of the hull on its front side as shown in FIG.

  Here, in the schematic configuration of the outboard motor 100, as shown in FIGS. 3 and 4, the engine 101 is disposed at the upper portion, and a drive shaft connected to the crankshaft of the engine 101 is disposed. Note that the detailed description of the internal structure of the engine 101 is omitted here. The output of the engine 101 is transmitted to the propeller 102 via the drive shaft.

  The engine 101 may be a water-cooled multi-cylinder engine, and is mounted and supported in a vertical position so that its crankshaft faces the vertical direction. The engine 101 includes a crankcase 103, a cylinder block 104 that accommodates a piston, a cylinder head 105, and the like, and an oil pan 106 that stores lubricating oil is coupled to a lower portion. A cooling water passage (not shown) is formed at appropriate positions of the cylinder block 104 and the cylinder head 105, and the cooling water flows through the inside thereof. A gear housing having a drive unit for rotating the propeller 102 by the drive force of the drive shaft is arranged below the oil pan 106.

  In this example, a throttle body 107 is disposed on the front side of the engine 101 (FIG. 4), and air sucked through the intake silencer 108 is distributed and supplied from the throttle body 107 to each cylinder through the intake manifold 109. The intake manifold 109 is disposed on the right side of the engine 101 as shown in FIG. An exhaust passage 110 is formed in a substantially vertical direction on the left side of the engine 101 (cylinder block 104). The combustion gas exhausted from the exhaust port is collected and exhausted into the water through the exhaust passage 110. A cooling water passage which will be described later is provided along the exhaust passage 110. An electrical box 111 is disposed on the left side of the engine 101, and the electrical box 111 is provided on the exhaust port side.

  The entire outboard motor 100 is covered with an exterior cover. That is, the upper cover 112, the lower cover 113, and the oil pan cover 114 are attached around the engine 101 and the oil pan 106 in order from the top. Further, a gear housing for rotationally driving the propeller 102 is accommodated in the gear case 115. These outboard covers are smoothly joined to each other, so that the outboard motor 100 has a sense of unity as a whole.

  The upper cover 112 substantially corresponds to the main body of the engine 101, covers the whole from the top, and can be removed. The lower cover 113 substantially corresponds to each part of the main body of the engine 101 and the oil pan 106, and includes a front cover 113A at the front and left and right side covers 113B. Latch levers 116 and 117 for attaching and detaching the upper cover 112 are provided on the front cover 113A and the left and right side covers 113B, respectively.

  In this example, as shown in FIG. 2 and the like, a cable introduction port 118 is provided in the front portion of the right side cover 113B. The cable introduction port 118 is inserted with a throttle cable, a shift cable, and other electrical wiring harnesses.

  The entire engine unit including the engine 101, the oil pan 106, and the gear case 115 is coupled to a steering shaft (not shown) via an upper mount 119 and a lower mount 120, and the steering shaft is rotatably mounted on a swivel bracket 121. Be supported. The swivel bracket 121 is fixed to the rear plate P of the hull via the clamp bracket 122, but is supported so as to be rotatable around the tilt shaft 123 (in the vertical direction).

  Although not shown, a cooling water pipe is suspended below the oil pan 106, and this cooling water pipe is connected to a water supply pipe for supplying water taken from a water intake provided around the gear housing. A cooling water pump driven by a drive shaft is disposed at a connection portion between the cooling water pipe and the water supply pipe. The cooling water pump takes water from the outside of the outboard motor 100 through a filter 124 attached to the water intake and feeds the water to the cooling water pipe.

  Now, the outboard motor 100 of the present invention includes a cooling water passage cleaning device 10 for purifying the inside of the cooling water passage to prevent salting or the like in the cooling water passage. For example, as shown in FIG. 2, the cooling water passage cleaning device 10 has a cleaning water introduction port 11 on the front surface of the lower cover 113, and the cleaning water introduction port 11 and the cooling water passage of the engine 101 are connected via a connection hose described later. Connected. FIG. 2 shows a state in which the cooling water passage cleaning device 10 is not used. At this time, a plug 12 is attached to the cleaning water inlet 11.

  In this embodiment, the lower cover 113 is composed of the front cover 113A fixed to the front portion of the engine 101 and the pair of side covers 113B fixed to both sides of the engine 101 as described above. Is provided on the front cover 113A. In particular, the exhaust passage 110 that collects exhaust gas discharged from the exhaust port and guides it downward as described above is provided, and the cleaning water inlet 11 is on the same side as the exhaust passage 110, that is, the left end of the front cover 113A. Is provided.

  As shown in FIG. 6, the cleaning water inlet 11 is opened on the bottom surface of the recess 14 formed integrally with the resin front cover 113A. A screw portion 15 is formed integrally with the front cover 113 </ b> A in the recess 14, and a plug 12 having a screw portion 13 that is screwed into the screw portion 15 is screwed thereto. The plug 12 is attached to close the cleaning water inlet 11 when not cleaned. The recess 14 has a depth such that the head portion 12a (knob portion) of the plug 12 does not substantially protrude from the surface of the lower cover 113A. In this case, particularly the head 12a of the plug 12 is formed into a smooth shape and attached to the recess 14 without a sense of incongruity. A seal 16 is mounted between the bottom surface of the recess 14 and the plug 12. Further, on the further inner side of the recess 14, a union 17 protrudes integrally with the front cover 113 </ b> A, and the inner hole of the union 17 and the cleaning water introduction port 11 communicate with each other.

  On the other hand, in the cylinder block 104, a connection port 18 is provided as shown in FIG. 3 at a portion where the cooling water passage is provided along the exhaust passage 110 as described above. As shown in FIG. 6, the connection port 18 is opened in the cooling water passage 125 (water jacket) of the cylinder block 104. A union 19 projects from the cylinder block 104, and the inner hole of the union 19 and the cooling water passage 125 communicate with each other. As shown in FIG. 6, the union 17 and the union 19 are connected via the connection hose 20, and thereby the cleaning water inlet 11 and the cooling water passage 125 are connected.

  As shown in FIG. 3 and FIG. 5 and the like, the connection hose 20 having one end coupled to the washing water introduction port 11 is routed to the left side from the washing water introduction port 11 on the front side of the engine 101 and the other end. Is coupled to the connection port 18. The connection hose 20 is mounted by effectively using the gap inside the lower cover 113 and is properly disposed without interfering with other functional members or parts.

  Here, the union 17 may be formed separately from the front cover 113A as shown in FIG. In this case, the flange portion 21 is provided on the union 17, while the union mounting boss 22 is provided on the front cover 113A. The union 17 can be fixed by fastening the flange portion 21 to the boss 22 with the bolt 23. In addition, although the screw part 15 is provided in the flange part 21 side as shown in the figure, it can also be provided in the boss 22 side of the recessed part 14.

  As shown in FIG. 7 or FIG. 8, the plug 12 is removed, and the connector 24 is screwed onto the screw portion 15. A water supply hose 25 is connected to the connector 24, and water can be supplied to the cleaning water inlet 11 from a water source such as tap water through the water supply hose 25.

  Further, in the present embodiment, a second cleaning water inlet provided at the rear part of the outboard motor accessible from the outside of the boat is provided separately from the front surface of the lower cover 113, that is, the cleaning water inlet 11 provided in the front cover 113A. Prepare. In this example, as shown in FIG. 1 or FIG. 3, the second cleaning water inlet 26 is set at an appropriate position of the left oil pan cover 114. FIG. 1 shows a state in which the cooling water passage cleaning device 10 is not used. At this time, a plug 27 is attached to the second cleaning water inlet 26.

  FIG. 9 shows a specific configuration example of the second cleaning water inlet 26. A cooling water passage 125 is provided inside the outer wall 106 a of the oil pan 106, and these are covered with an oil pan cover 114. The second washing water inlet 26 is opened at the bottom surface of the recess 28 formed in the outer wall 106a. A screw part 29 is formed in the recess 28, and the plug 27 is screwed onto the screw part 29. The oil pan cover 114 is provided with an access hole 30 for inserting a plug 27, a connection hose, or the like at a portion corresponding to the second cleaning water inlet 26. A seal 31 is mounted between the bottom surface of the recess 28 and the plug 27.

  Also in this example, as shown in FIG. 10, the plug 27 is removed, and the connector 24 is screwed onto the screw portion 29. A water supply hose 25 is connected to the connector 24, and water can be supplied to the second cleaning water inlet 26 from a water source such as tap water through the water supply hose 25.

  In the above configuration, when the inside of the cooling water passage is washed after using the outboard motor 100, for example, when washing is performed on water, the washing water inlet 11 of the cooling water passage washing device 10 is typically used. In this case, as shown in FIG. 6, the plug 12 blocking the cleaning water inlet 11 of the front cover 113 </ b> A is removed, and the connector 24 is screwed to the screw portion 15. Accordingly, water is supplied from the water supply hose 25 to the cleaning water inlet 11 as shown in FIG. 7, that is, the cleaning water is supplied to the water supply hose 25, the union 17, the connection hose 20, and the cooling water passage 125 as indicated by an arrow W. Can do. The tap water used for washing is drained as it is after circulating through the cooling water passage.

  On the other hand, when the ship is landed, the washing water inlet 26 is typically used. In this case, in particular, by rotating the outboard motor 100 around the tilt shaft 123, the cleaning water inlet 26 can be disposed at a height where it is easy to work. Also in this case, as shown in FIG. 9, the plug 27 closing the cleaning water inlet 26 is removed from the access hole 30 of the oil pan cover 114, and the water supply hose 25 is connected via the connector 24.

  By having two cleaning water inlets 11 formed in the front cover 113A and two second cleaning water inlets 26 formed in the oil pan cover 114 as described above, it can be accessed from either the inside or the outside of the ship. It is. As a result, it is possible to easily and appropriately clean the cooling water passage both when the ship is moored and when it is unloaded, and it is extremely convenient by appropriately using it as necessary. The effect is particularly high when the outboard motor 100 is large.

  The cooling water passage cleaning apparatus 10 of the present invention has a cleaning water inlet 11 particularly in the front cover 113A. By the way, during maintenance of the outboard motor 100, the left and right side covers 113B of the upper cover 112 and the lower cover 113 are usually removed, and the front cover 113A is attached to the engine 101 as it is. By providing the cleaning water introduction port 11 using the front cover 113A in this manner, the connection hose 20 can be left as it is even during maintenance, etc. Realize.

  In this embodiment, the exhaust passage 110 is disposed on the left side of the engine 101, and the cleaning water inlet 11 is provided at the left end of the front cover 113 </ b> A on the same side as the exhaust passage 110. On the left side of the engine 101, there is no possibility of interference with a throttle cable, a shift link mechanism, other cables, etc., which is advantageous in terms of assembly. Further, the cooling water of the outboard motor 100 is guided to the engine 101 along the exhaust passage 110, and therefore, it is necessary to connect the connection hose 20 in the middle of the cooling water passage 125. Therefore, by providing the front cover 113A on the left side, there is an advantage that the length of the connection hose 20 can be made shorter and the routing thereof becomes easy.

  In the above case, the recess 14 has such a depth that the plug 12 does not substantially protrude from the surface of the front cover 113A. With this configuration, the plug 12 can be effectively protected while having a simple structure. For example, if the plug 12 attached to the cleaning water introduction port 11 protrudes from the front cover 113A, an object may come into contact with the plug 12 during work on a ship and the plug 12 may be damaged as it is. The plug 12 can be protected by mounting the plug 12 so as to be buried in the recess 14. Therefore, there is no concern that the cooling water leaks during engine operation due to a decrease in sealing performance due to breakage of the plug 12 or the like.

  The head 12a of the plug 12 is formed into a smooth shape. By configuring the plug 12 and the recessed portion 14 in this way, there is no concern that the appearance of the flash surface of the outboard motor 100 will be impaired, and there is no concern that fishing lines will be caught.

  Further, the recess 14 and the union 17 are formed integrally with the front cover 113A. By integrally molding in this way, there is no need to separately provide a union and a connector mounting portion, and the number of parts can be reduced and space can be saved. This type of outboard motor that arranges and configures a large number of parts in a limited space is extremely advantageous, and can reduce costs in combination with reduction in assembly man-hours. Therefore, the cost burden on the user accompanying the improvement in maintenance is small, and the merchantability can be improved.

  Next, a second embodiment of the cooling water passage cleaning apparatus 10 according to the present invention will be described. In addition, the same code | symbol shall be used for the same or corresponding member as embodiment mentioned above. As described above, the intake device is disposed on the right side surface of the engine 101. In this embodiment, as shown in FIG. 11, the cleaning water inlet 11A is provided at the right end of the front cover 113A on the same side as the intake device.

  A cable introduction port 118 is provided at the front portion of the right side cover 113B. In this embodiment, the cleaning water introduction port 11A is disposed at a position close to the cable introduction port 118. The configuration of the cleaning water inlet 11A itself and its periphery are substantially the same as in the case of the above-described embodiment (FIG. 6 or FIG. 8).

  In this example, as shown in FIG. 12, the front cover 113A on the cable introduction port 118 side is flattened, and this part can easily secure the space for arranging the washing water introduction port 11A. Further, when the throttle body 107 is arranged on the front side of the crankcase, it is a dead space in which it is difficult to arrange other parts on the lower side of the throttle body 107. By providing the washing water introduction port 11A at this portion, the washing water introduction port 11A can be disposed with high space efficiency without increasing the size of the engine 101.

  Furthermore, in another embodiment according to the present invention, in the cooling water passage cleaning apparatus 10, the lower cover 113 includes a front cover 113A fixed to the front portion of the engine 101 and a pair of side covers 113B fixed to both sides of the engine 101. In addition, as shown in FIG. 1 or FIG. 11, the cleaning water inlet 11B may be provided near the front portion of the left side cover 113B where the cable inlet 118 is not provided.

  For example, when the cleaning water inlet 11 is provided in the front cover 113A as described above, when the outboard motor 100 is tilted up, the cleaning water inlet 11 faces downward, and it becomes difficult to attach the water supply hose 25 as it is. On the other hand, when provided at the front portion of the side cover 113B as described above, the washing water introduction port 11B can be disposed sideways (upward) by steering the outboard motor 100 when tilted up. The attachment work of the hose 25 can be facilitated.

As mentioned above, although this invention was demonstrated with embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention.
For example, the example in which the cleaning water introduction port 11 and the second cleaning water introduction port 26 of the front cover 113A are provided side by side has been described, but it is also possible to provide only the cleaning water introduction port 11 alone, as in the above embodiment. Advantageous effects can be obtained.

1 is a left side view showing an overall configuration example of an outboard motor according to the present invention. 1 is a front view of an outboard motor according to the present invention. It is a left view which shows the internal structure of the outboard motor which concerns on this invention. It is a front view which shows the internal structure of the outboard motor which concerns on this invention. It is a top view which shows the internal structure of the outboard motor which concerns on this invention. It is sectional drawing which follows the AA line of FIG. 2 which shows the structural example of the cooling water channel | path washing | cleaning apparatus in embodiment of this invention. It is sectional drawing which shows the effect | action of the cooling water channel | path washing | cleaning apparatus in embodiment of this invention. It is sectional drawing which shows the modification of the cooling water channel | path washing | cleaning apparatus in embodiment of this invention. It is sectional drawing which follows the BB line of FIG. 1 which shows the structural example of the 2nd washing water inlet which concerns on embodiment of this invention. It is sectional drawing which shows the effect | action of the 2nd washing water inlet which concerns on embodiment of this invention. It is a front view of the outboard motor which concerns on the 2nd Embodiment of this invention. It is a top view of the outboard motor which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cooling water channel | path washing | cleaning apparatus 11 Washing water introduction port 12 Plug 14 Recess 15 Screw part 16 Seal 17 Union 18 Connection port 19 Union 20 Connection hose 24 Connector 25 Water supply hose 26 Second washing water introduction port 27 Plug 28 Recess 30 Access hole 31 Seal 100 Outboard motor

Claims (5)

A cooling water passage cleaning device for an outboard motor equipped with a water-cooled engine covered with an engine cover composed of an upper cover and a lower cover that can be divided into upper and lower parts,
The lower cover is composed of a front cover fixed to the front portion of the engine and a pair of side covers fixed to both sides of the engine,
An exhaust passage that collects exhaust gas discharged from the exhaust port and guides it downward is provided on one side of the engine, and a cleaning water inlet is provided at the end of the front cover on the same side as the exhaust passage. A cooling water passage cleaning apparatus for an outboard motor, wherein the introduction port and the cooling water passage of the engine are connected via a connection hose. 2. The cooling water for an outboard motor according to claim 1 , wherein an intake device is disposed on a side surface of the engine, and the cleaning water inlet is provided at an end of the front cover on the same side as the intake device. Passage cleaning device.   The lower cover includes a front cover fixed to a front portion of the engine and a pair of side covers fixed to both sides of the engine, and the cleaning water inlet is a side cover provided with no cable inlet. The outboard motor cooling water passage cleaning device according to claim 1, wherein the outboard motor cooling water passage cleaning device is provided at a front portion of the outboard motor. A plug that closes the cleaning water inlet at the time of non-cleaning is attached, and a recess having a depth that does not protrude from the surface of the lower cover is formed, and the cleaning water inlet is provided on the bottom surface of the recess. The cooling water passage cleaning apparatus for an outboard motor according to any one of claims 1 to 3 . 2. A second cleaning water inlet provided at the rear part of the outboard motor accessible from the outside of the boat is provided separately from the cleaning water inlet provided on the front surface of the lower cover. 5. The cooling water passage cleaning device for an outboard motor according to claim 4 .

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