JP3795157B2 - Outboard motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outboard motor, and more particularly, to an arrangement of an operation member for opening / closing an engine cover and an oil inlet of a crankcase.
[0002]
[Prior art]
In general, an outboard motor is configured such that an engine cover is detachably attached to an upper portion of an undercase by an engagement / disengagement device, and an engine room for accommodating the engine is formed by the undercase and the engine cover. As such an engagement / disengagement device, for example, there is a technique disclosed in Japanese Patent Laid-Open No. 3-32998 “Outboard Motor”.
According to FIG. 1 of the gazette, this technology has an engine cover 3 (numbers quoted those described in the gazette; the same applies hereinafter) with a front end and a rear end, and attachment / detachment devices 6 and 6, respectively. The lower edge of the casing 2 is attached along the upper edge 7 of the casing 2. The engine 5 was attached to the casing 2.
[0003]
[Problems to be solved by the invention]
By the way, in recent years, with the increase in size of an engine, maintenance / inspection work such as oil inspection is required to be easy from removal of the engine cover 3 to actual work and re-installation of the removed engine cover 3.
[0004]
Accordingly, an object of the present invention is to provide a technique capable of easily performing an engine cover attaching / detaching operation and an oil injection operation.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a multi-cylinder engine with a crankcase facing the front of an outboard motor is attached to the upper portion of the mount case, and an undercase is attached to the upper portion of the mount case. In an outboard motor in which an engine cover is detachably attached to an upper portion of the case by an engagement / disengagement device, and an engine room for accommodating the engine is formed by the undercase and the engine cover. The engine cover is configured to be engaged / disengaged by a plurality of saddle members, and at least two of the plurality of saddle members provided on the left and right sides of the outboard motor can be interlocked and rotated to be integrally engaged / disengaged. The connecting member is connected to a connecting shaft, and the operating member for rotating the connecting shaft is provided in the undercase and either left or right with respect to the propulsion direction of the hull. Arrangement and, also, in front of the crankcase, and wherein the attaching the engine lubricating oil inlet toward the arrangement direction of the operating member.
[0006]
Since the oil inlet is attached to the front of the crankcase facing the front of the outboard motor, this oil inlet is in the vicinity of the stern. For this reason, oil injection work is easy.
In addition, oil can be injected while the outboard motor is tilted to the left or right and the engine cover is removed. In particular, it is easy to confirm the oil inlet position. For this reason, since the operation of the operation member for simultaneously operating at least two of the plurality of eaves members and the oil injection operation can be performed from the same direction, workability is improved.
For this reason, the engine cover attaching / detaching operation and the oil injection operation can be easily performed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of an outboard motor according to the present invention. The outboard motor 1 is mounted on a mount case (engine support case) 2 as an engine mounting member and is bolted to a vertical multi-cylinder engine 3. An extension case 4 that is bolted under the mount case 2 to form an exhaust expansion chamber, a vertical drive shaft 5 that is housed in the extension case 4 and transmits power from the engine 3, and a lower portion of the extension case 4 A gear case 6, a bevel gear set housed in the gear case 6 and switching forward and backward, a dog clutch device 7, a propeller 8 connected to the bevel gear set and rotated by the transmitted power, the extension case 4 and the gear case 6 Cooling water screen 11, cooling water supply pipe 12, water pump The outboard motor body 1A consisting of 3 or the like, supporting the outboard motor mounting means 15 elastically through a mount rubber (not shown), is obtained by coupling.
[0008]
The outboard motor mounting means 15 is a metal fitting for fixing the outboard motor main body 1A to the hull S. The outboard motor main body 1A swings left and right in plan view around the swivel shaft 16, and the tilt shaft 17 is centered. The outboard motor main body 1A including the swivel shaft 16 can be flipped up in the clockwise direction.
The outboard motor main body 1 </ b> A further includes a lower undercase 21 and an upper engine cover 22 that accommodate the engine 3, and an undercover 23 that covers the periphery of the mount case 2 and the upper periphery of the extension case 4 immediately below the undercase 21. And with.
[0009]
Specifically, an undercase 21 is mounted on the upper portion of the mount case 2 and bolted, and an engine cover 22 is mounted on the upper portion of the undercase 21 and is detachably attached by an engagement / disengagement device 50. The upper part of the under cover 23 is bolted. Details of the engagement / disengagement device 50 will be described later (described in FIG. 3).
The undercase 21 and the engine cover 22 serve to form an engine room (engine housing case), and the undercover 23 serves as a decorative cover. The undercase 21 may be configured to be fixed to the extension case 4. In the figure, 24 is an oil pan.
[0010]
FIG. 2 is a longitudinal sectional view of a vertical type multi-cylinder engine according to the present invention.
The vertical type multi-cylinder engine 3 is composed of, for example, a water-cooled four-cycle (four-cylinder) engine. The vertical axis of each cylinder 31 (... indicates a plurality; the same applies hereinafter) is set to be horizontal (substantially horizontal). The shaft 32 is vertically oriented, and the joint surface between the sideways cylinder block 33 and the cylinder head 34 and the joint surface between the cylinder head 34 and the head cover 35 are substantially vertical surfaces.
The engine 3 is arranged with the cylinder head 34 and the head cover 35 facing the rear of the outboard motor 1 (rear in the propulsion direction of the hull S shown in FIG. 1, ie, the left direction in this figure).
36 is a crankcase fixed to the cylinder block 33 with bolts, 37... Are pistons in the cylinders 31.
[0011]
The crankshaft 32 includes a first pulley 32a for driving a vertical camshaft 38 on the upper side (one side of the engine 3), a second pulley 32b, and a third pulley 32c for driving an AC generator 41. The flywheel 43 with the ring gear 43a is attached to the lower part (the other side of the engine 3), and the flywheel 43 is connected to a starter motor (not shown) by the ring gear 43a.
The undercase 21 is fixed to the mount case 2 with a bolt 28 via a vibration-proof rubber 27. The connecting shaft 55 is supported by the undercase 21. For this reason, the connecting shaft 55 (see FIG. 3) described later is not affected by the vibration of the mount case 2.
In the figure, reference numeral 22a denotes an intake port at the top of the engine cover 22, 39 denotes a first belt, 40 denotes a second belt, 42 denotes a third belt, and 44 denotes a belt cover. Reference numeral 44 a denotes a ventilation port above the belt cover 44, which ventilates the air in the belt cover 44 from the belt cover 44 to the outside of the engine cover 22. 46 is an oil filter, 47 is an intake silencer box, and 48 is a throttle valve device.
[0012]
3 is a cross-sectional view taken along the line 3-3 in FIG. Note that the engine 3 is omitted, and a part thereof is indicated by an imaginary line. Moreover, all the engaging / disengaging devices 50 show a locked state.
The undercase 21 has a notch 21a for maintaining and inspecting the engine 3 from the rear, and the notch 21a is closed with a detachable lid 49. The undercase 21 and the engine cover 22 are attached to each other by an engagement / disengagement device 50, and the engagement / disengagement device 50 is connected to a first engagement / disengagement mechanism 51 in front of the outboard motor 1 (right in the figure). The second engaging / disengaging mechanism 52 on the left side of the outboard motor 1 (the lower side of the figure) and the third engaging / disengaging mechanism 53 on the right side of the outboard motor 1 are included.
[0013]
Specifically, the first engagement / disengagement mechanism 51 swings inside the front portion of the undercase 21 so as to be engaged with and disengaged from the hooked portion 61 provided inside the front portion of the engine cover 22. A hook-shaped hook member (hanging member) 66 provided freely, and a first lever (first operation member) 67 disposed outside the front portion of the undercase 21 for swinging the hook member 66. It consists of. Reference numeral 68 denotes a support shaft that supports the flange member. Details of the hooked portion 61 will be described later (described in FIG. 4).
The hooked portions of the second and third engagement / disengagement mechanisms 52 and 53 have the same configuration as the hooked portion 61 of the first engagement / disengagement mechanism 51, and the description thereof will be omitted.
[0014]
The second engagement / disengagement mechanism 52 is provided with a hooked portion 61 provided inside the left side portion of the engine cover 22, and is swingably provided inside the left side portion of the undercase 21 so as to be engaged with and detached from the hooked member 61. And a hooking portion 71.
The third engaging / disengaging mechanism 53 is swingable inside the right side portion of the undercase 21 so as to be engaged with and disengaged from the hooked portion 61 provided inside the right side portion of the engine cover 22. It is provided with a hooking portion 81 provided.
[0015]
The latching portion 71 of the second engagement / disengagement mechanism 52 and the latching portion 81 of the third engagement / disengagement mechanism 53 are connected by a connecting shaft 55 so as to be integrally engaged and disengaged in conjunction with each other. Specifically, the undercase 21 rotatably supports a connecting shaft 55 that extends left and right with two left and right bearings 54, 54. The connecting shaft 55 has a second lever (second operation member) 56 attached to one end thereof. Two sets of latching parts 71 and 81 are connected.
The second lever 56 is disposed outside the left side portion of the undercase 21 in order to rotate the connecting shaft 55, and is a common operation lever that simultaneously operates the two sets of engagement / disengagement mechanisms 52 and 53.
Even if the connecting shaft 55 extends in the left-right direction of the undercase 21, it does not get in the way because the connecting shaft 55 passes below the cylinder head 34 (see FIG. 2).
Hereinafter, the first, second, and third engagement / disengagement mechanisms 51 to 53 will be described in detail.
[0016]
FIG. 4 is a side view of the first engagement / disengagement mechanism according to the present invention, and shows a state where the undercase 21 and the engine cover 22 are locked by the first engagement / disengagement mechanism 51.
The hooked portion 61 of the first engagement / disengagement mechanism 51 includes a bracket 62 bolted to the engine cover 22, a locking leg 63 attached to the bracket 62, and a rotatable attached to the locking leg 63. And roller 64.
The bracket 62 is integrally provided with a suspended guide leg 62a. The guide leg 62a is fitted to a boss 21a raised on the undercase 21 via a cushion rubber 65, so that the engine is attached to the undercase 21. This is a guide for covering the cover 22.
[0017]
When the support shaft 68 is rotated by the first lever 67 shown in FIG. 3, the unlocked hook member 66 swings and engages with the roller 64. As a result, the undercase 21 and the engine cover 22 are locked as shown in FIG.
In the figure, reference numeral 26 denotes a packing.
[0018]
FIG. 5 is a perspective view of the second and third engagement / disengagement mechanisms according to the present invention, and shows the second and third engagement / disengagement mechanisms 52 and 53 in an unlocked state.
The latching portion 71 of the second engagement / disengagement mechanism 52 includes an obliquely downward first arm 72 attached to the connecting shaft 55, and an upward link 73 having one end pivotably connected to the swinging tip of the first arm 72. The second arm 74 in the lateral direction (left-right direction in the figure) having the middle part pivotably connected to the other end of the link 73 and the one end (end part near the connecting shaft) of the second arm 74 are swung. A bearing 75 provided on the undercase 21 (see FIG. 3) to be supported, a hook member 76 having a generally left and right reversely-shaped shape with an intermediate portion pivotably connected to the swinging tip of the second arm 74; A tension spring 77 is provided between a lower end portion of the hook member (holding member) 76 and a hanging portion 74 a at the swinging tip end of the second arm 74.
The hook member 76 has a hooking claw 76 a for engaging with and disengaging from the roller 64 of the hooked portion 61 at the upper end. Reference numeral 78 denotes a support shaft.
[0019]
The latching portion 81 of the third engagement / disengagement mechanism 53 has the same configuration as the latching portion 71 of the second engagement / disengagement mechanism 52, but the other mechanisms except for the first arm 72 are the same as the second engagement / disengagement mechanism 52. It is the structure of right-and-left reverse direction, attaches | subjects the same code | symbol and abbreviate | omits the description.
[0020]
Next, the operation of the second and third engagement / disengagement mechanisms 52 and 53 having the above-described configuration will be described with reference to FIGS.
6 (a) to 6 (c) are diagrams for explaining the operation of the second and third engagement / disengagement mechanisms (unlocked state) according to the present invention, and FIGS. 7 (a) to (c) are diagrams for explaining the second and second aspects according to the present invention. It is action | operation explanatory drawing of 3 engagement / disengagement mechanisms (lock state).
6A, the second lever 56 is downward, and in this state, the first arm 72 is obliquely downward in the drawing. At this time, the flange member 76 of the second engagement / disengagement mechanism 52 in FIG. 6B is in an unlocked state. Further, the hook member 76 of the third engagement / disengagement mechanism 53 of FIG. 6C is also in the unlocked state.
[0021]
From this state, when the second lever 56 in FIG. 6A is swung in the counterclockwise direction, the connecting shaft 55 rotates in the same direction, so the first arm 72 also swings in the counterclockwise direction in the figure. As a result, in the second engagement / disengagement mechanism 52 of FIG. 6B, the link 73 rises, so that the second arm 74 swings counterclockwise in the figure with respect to the support shaft 78, and accordingly, the collar member 76. Also swings counterclockwise in the figure. Similarly, in the third engagement / disengagement mechanism 53 of FIG. 6C, the flange member 76 swings in the clockwise direction.
[0022]
When the second lever 56 is swung to the position shown in FIG. 7A, the second engagement / disengagement mechanism 52 shown in FIG. By being hooked on 64, a locked state is established. At the same time, the third engagement / disengagement mechanism 53 of FIG. 7C is also locked by the latching claw 76 a being latched on the roller 64.
On the other hand, the second and third engagement / disengagement mechanisms 52 and 53 can be unlocked by performing the reverse operation to the above-described locking operation.
[0023]
As described above, when one hook member 76 is engaged and disengaged by the swinging operation of one second lever 56, the connecting shaft 55 rotates and the other hook member 76 is interlocked with the one hook member 76. And can be integrally engaged and disengaged.
[0024]
The tension spring 77 is elastic in the direction (the counterclockwise direction in the figure) for hooking the collar member 76 on the roller 64. For this reason, when shifting to the locked state, the latching claw 76 a opens against the elastic force of the tension spring 77, temporarily climbs over the roller 64, and then closes again with the elastic force of the tension spring 77. Thus, the roller 64 is hooked as shown in FIG. Therefore, the second engaging / disengaging mechanism 52 can perform a locking action without difficulty. Further, in the locked state, a reliable locked state can be maintained by the elastic force of the tension spring 77. The same applies to the third engagement / disengagement mechanism 53.
[0025]
FIG. 8 is a view taken in the direction of the arrow 8 in FIG. 2. The engine 3 has an oil inlet 45 for engine lubrication attached in front of the hull S (see FIG. 1) in the propulsion direction (frontward in this figure). 2 is characterized in that it is directed to the arrangement direction of the second lever 56 shown by an imaginary line in FIG. 2 (left side with respect to the propulsion direction of the hull S, that is, the left side portion of the undercase 21).
Specifically, the crankcase 36 faces the front of the outboard motor 1 (frontward in this figure), and has an oil inlet 45 for engine lubrication attached to the upper portion and the left end of the front wall (front surface) 36a. is there. The oil injection port 45 faces obliquely upward to the left, and its tip is closed with a cap 45a. The oil injection port 45 protrudes from the side surface of the crankcase 36 on the side where the second lever 56 is located. The oil injection port 45 communicates with the crankcase 36, and therefore, the oil accumulates in the oil pan 24 shown in FIG.
In the figure, X is the center of the crankshaft 32 (center of the outboard motor 1), 36b is the left wall (left side surface) of the crankcase 36, and 36c is the upper wall (upper surface) of the crankcase 36.
[0026]
Next, a procedure for lubricating the engine 3 having the above-described configuration while being mounted on the outboard motor main body 1A will be described.
9 (a) and 9 (b) are explanatory views of the lubrication procedure of the engine according to the present invention.
FIG. 9A is a schematic plan view of the state in which the outboard motor 1 is attached to the hull S. The outboard motor main body 1A is rocked to the left L or right R in plan view by the attachment means 15 on the outboard motor hull S. The figure is attached so that it can be moved. The propulsion direction of the hull S is an arrow A direction.
The second lever 56 for simultaneously operating the second and third engagement / disengagement mechanisms 52 and 53 and the oil injection port 45 are arranged on the left with respect to the propulsion direction A of the hull S.
[0027]
When the rudder is turned to the left with the boat stopped, the outboard motor main body 1A is tilted to the left as shown in FIG. 9B. For this reason, the second lever 56 and the oil injection port 45 are also directed to the left.
In this state, (1) the first and second levers 67 and 56 are operated from the hull S side to unlock the engagement / disengagement device 50 (see FIG. 3), and (2) the engine cover 22 (see FIG. 1). Remove.
Next, (3) remove the cap of the oil injection port 45 and inject oil.
[0028]
Thus, since the oil injection port 45 attached to the engine 3 is in the vicinity of the stern, the oil injection operation is easy.
Further, oil can be injected while the outboard motor main body 1A is tilted to the left and the engine cover 22 is removed. In particular, the position of the oil injection port 45 can be easily confirmed. For this reason, the lever operation work of the second lever 56 for simultaneously operating the second and third engagement / disengagement mechanisms 52 and 53 and the oil injection work can be performed from the same direction, so that workability is improved.
[0029]
In the above-described embodiment, the connecting shaft 55 may be any as long as at least two of the plurality of eaves members 76 are interlocked and disengaged integrally.
Further, the second lever (operation member) 56 for simultaneously operating the plurality of eaves members 76 (the plurality of engagement / disengagement mechanisms 52, 53) may be any one that is disposed outside one side of the undercase 21, For example, you may arrange | position to the right side part other than the left side part of the undercase 21. FIG.
Further, the engine lubricating oil inlet 45 is provided on the front surface of the crankcase 36 of the engine 3 with a second lever (operation member) for simultaneously operating the plurality of eaves members 76 (the plurality of engagement / disengagement mechanisms 52, 53). What is necessary is just the structure attached toward the arrangement direction of 56.
[0030]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
According to the first aspect of the present invention, a multi-cylinder engine with a crankcase facing the front of the outboard motor is attached to the top of the mount case, an under case is attached to the top of the mount case, and an engine cover is attached to the top of the under case. In an outboard motor that is detachably attached by an engagement / disengagement device and forms an engine room for accommodating the engine by the undercase and the engine cover, the engagement / disengagement device is attached to the undercase. It is configured to be engaged and disengaged with a saddle member, and among these plural saddle members, at least two provided on the left and right sides of the outboard motor are connected with a connecting shaft that can be rotated so as to be integrally engaged and disengaged, An operation member for rotating the connecting shaft is disposed in the undercase and on either the left or right side of the propulsion direction of the hull. In front of Kukesu, characterized in that attached to the engine lubricating oil inlet toward the arrangement direction of the operating member.
[0031]
Since the oil inlet is attached to the front of the crankcase facing the front of the outboard motor, this oil inlet is in the vicinity of the stern. For this reason, oil injection work is easy.
In addition, oil can be injected while the outboard motor is tilted to the left or right and the engine cover is removed. In particular, it is easy to confirm the oil inlet position. For this reason, since the operation of the operation member for simultaneously operating at least two of the plurality of anchor members provided on the left and right of the outboard motor and the oil injection work can be performed from the same direction, workability Will increase.
For this reason, the engine cover attaching / detaching operation and the oil injection operation can be easily performed.
[Brief description of the drawings]
1 is a side view of an outboard motor according to the present invention. FIG. 2 is a side sectional view of a vertical multi-cylinder engine according to the present invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. FIG. 5 is a perspective view of the second and third engagement / disengagement mechanisms according to the present invention. FIG. 6 is a second and third engagement / disengagement mechanism according to the present invention (unlocked state). FIG. 7 is a diagram illustrating the operation of the second and third engagement / disengagement mechanisms (locked state) according to the present invention. FIG. 8 is a view taken along the arrow 8 in FIG. 2. FIG. Diagram of procedure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Outboard motor, 1A ... Outboard motor main body, 2 ... Mount case, 3 ... Vertical type multi-cylinder engine, 21 ... Undercase, 22 ... Engine cover, 45 ... Oil injection port for engine lubrication, 50 ... Engagement / disengagement device 51-53 ... 1st, 2nd, 3rd engagement / disengagement mechanism, 55 ... Connection shaft, 56 ... 2nd operation member (2nd operation lever), 61 ... Engagement part, 66,76 ... Hook member (hanging) Stop member), 67... First operation member (first operation lever), 71, 81... Hook, A.

Claims (1)

A multi-cylinder engine with a crankcase facing the front of the outboard motor is attached to the upper part of the mount case, an under case is attached to the upper part of the mount case, and the engine cover can be attached to and detached from the upper part of the under case with a detachable device mounting, Te outboard odor forming an engine room for accommodating said engine and these undercase and an engine cover,
The engagement / disengagement device is configured to engage / disengage the engine cover to / from the undercase with a plurality of saddle members, and at least two of the plurality of saddle members provided on the left and right sides of the outboard motor are interlocked and integrated. Are connected by a rotatable connecting shaft so as to be engaged and disengaged, and an operation member for rotating the connecting shaft is arranged in the undercase and on either the left or right with respect to the propulsion direction of the hull ,
Further, on a front surface of the crankcase, the engine lubricating oil inlet toward the arrangement direction of the operating member mounting digits,
Outboard motor characterized by that .

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