JPH06329091A - Drive transmission device for ship propulsion - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a clutch operating device for a ship propulsion machine with excellent assembly workability. [Structure] A shift slider 40 for moving a clutch gear 30 via a clutch shifter pin 38 penetrating slidably in the propeller shaft 9 in the axial direction, and an operating member operable from above the gear case 5, A shift fork 50 that moves by engaging with a fork engaging portion of the shift slider 40.
A guide member 59 that is movably supported in a predetermined direction, a rotatable rod member 10 that engages with a rod engaging portion to move, a lower end portion that is drivably supported, and the guide member 59 that is fixedly supported. The gear case 5 is composed of a support member 17 that is assembled to transmit the rotation of the member 10 to the movement of the fork 50.
The fork 50 is engaged with the fork engaging part of the slider 40 by fitting from above to the predetermined fitting part of the slider 40, and the operation drive of the member 10 is transmitted to the slider 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive transmission operating device via a clutch in a ship propulsion machine such as an outboard motor and an outboard motor.

[0002]

2. Description of the Related Art A main type of ship propulsion system is a mechanism in which an engine output is transmitted downward by a vertical shaft and is transmitted to the rotation of a propeller shaft via a bevel gear and a clutch gear.

An example of operating the clutch gear of such an outboard motor with a shift fork is disclosed in Japanese Patent Application Laid-Open No. 50-21493.

In this example, a clutch is operated through a slider by sliding an annular member axially slidably fitted on the outer periphery of a propeller shaft, and the annular member has a groove formed on its outer periphery. On the other hand, an engaging pin is eccentrically eccentrically formed in a crank shape at the lower part of the shift rod that serves as the axis of rotation, and the engaging pin engages with the groove of the annular member.

By rotating the shift rod and swinging the engagement pin back and forth, the annular member is moved back and forth to operate the clutch.

[0006]

However, the annular member rotates normally or reversely at a high speed together with the propeller shaft, and the engaging pin at the lower portion of the shift rod engages and slidably contacts the groove on the outer periphery of the rotating high speed annular member. Moreover, since the annular member that rotates at a high speed is pressed by the sliding of the engaging pin, even a slight misalignment of the shaft center or backlash is likely to be promoted, which greatly affects the support structure and assembly of the operation system. Careful and reliable operation must be achieved, which is not easy.

The present invention has been made in view of the above points, and an object of the present invention is to provide a drive transmission device for a marine vessel propulsion device capable of easily supporting the operating system reliably and accurately.

[0008]

In order to achieve the above object, the present invention is directed to a propeller shaft having a propeller at one end, which is rotatably supported in a gear case. A forward gear and a reverse gear that rotate in opposite directions are rotatably supported, and a clutch gear that rotates together with the propeller shaft and is slidably supported in the front-rear direction is clutch-coupled to any one of the pair of gears to connect the propeller. In a drive transmission device for a ship propulsion device that moves a ship forward or backward by rotating in the forward or reverse direction, a shift for moving the clutch gear through a clutch shifter pin that is slidable in the propeller shaft in the axial direction and penetrates the propeller shaft. A slider and an operation member capable of operating the shift slider from above the gear case, wherein the operation member is the shift slider. A shift fork that engages with the fork engaging portion to move the shift slider, a guide member that supports the shift fork so that the shift fork is movable in a predetermined direction, and a shift fork that engages with the rod engaging portion of the shift fork. A rotating rod member to be moved, and a support that movably supports near the lower end of the rod member, and fixedly supports the guide member so as to transmit the rotation of the rod member to the movement of the shift fork. The shift fork is engaged with the fork engaging portion of the shift slider by fitting the support member into the predetermined fitting portion of the gear case from above, and the operation drive of the rod member is performed. The drive transmission device of the ship propulsion device is assembled so as to be transmitted to the shift slider.

Since the supporting member can be assembled in the casing in a unitized state in which the shift fork, the guide member and the rotary rod member are assembled in a small unit, the drive transmission from the rod member to the shift fork and the operation of each member. Is performed reliably and the workability is good. Furthermore, the shift fork of the shift slider is a fork engagement member of the shift slider only by fitting the support member, which is a small assembly of the rotary type rod member, into the predetermined fitting portion of the gear case from above. Since it engages with the mating portion, it can be assembled easily and securely.

Since the supporting member is provided with the positioning means for holding the shift fork at the neutral position, the shift fork can be easily engaged with the fork engaging portion of the shift slider when the supporting member is fitted into the gear case fitting portion. can do.

By forming a groove in the gear case fitting portion and fitting a projection provided on the support member into the groove, the support member can be easily positioned with respect to the gear case.

By making the rod engaging portion of the shift fork engageable with the rod member in the state where the shift fork is inverted, it is possible to easily meet both the base specification and the counter specification.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 to 8 will be described below.

FIG. 1 shows the overall structure of an outboard motor 1 of this embodiment. The outboard motor 1 attached to the stern of the boat S by the hooking device 2 has a shape in which the center is narrowed from the engine cover 3 that defines a part of the engine room that houses the engine 6 and the corresponding part. Case part 4 extending downward
And a gear case 5 having a propeller 7 and supporting a horizontally extending propeller shaft 9, the outer shape thereof is constituted.

The engine 6 in the engine cover 3 has a crankshaft extending vertically downward and is coaxially connected to a vertical shaft 8.

The vertical shaft 8 penetrates the case portion 4 downward to transmit power to the gear mechanism in the gear case 5, and the propeller shaft 9 oriented substantially horizontally in the lower casing 5 through the gear mechanism is positive. Reversely, the propeller 7 fitted to the propeller shaft 9 is rotated to move the boat S forward or backward.

The gear mechanism includes a clutch mechanism, and a shift rod 10 for operating the clutch is provided in parallel with the vertical shaft 8 from the engine cover 3 to the gear case 5.

Referring to FIG. 2, a drive gear 16 is fitted to the lower end of a vertical shaft 8 rotatably supported by a bearing 15 in the gear case 5, and is fitted into the gear case 5 from the rear. Bearing on the bearing holder or support member 17
A pair of forward and reverse driven gears 19 and 20 are rotatably fitted to the front and rear of the drive gear 16 and meshed with the drive gear 16 on a propeller shaft 9 rotatably supported via 18 .

The drive gear 16 and the driven gears 19 and 20 are bevel gears and have a vertical shaft 8 as a rotation shaft.
The rotation of 16 is changed to the rotation of the driven gears 19 and 20 with the substantially horizontal propeller shaft 9 as the rotation center axis. Front driven gear 19
The driven gear 20 on the rear side rotates in the reverse direction with respect to the normal rotation.

The driven gear 19 is supported on the propeller shaft 9 via a bearing 21 on the inside of its cylindrical portion 19a, and is rotatably supported on the gear case 5 via the bearing 22 on the outside of the cylindrical portion 19a. The clutch teeth 19c are formed inside the teeth 19b meshing with the drive gear 16.

On the other hand, the driven gear 20 on the rear side has a cylindrical portion 20a.
Is rotatably supported by the propeller shaft 9, the outside of the cylindrical portion 20a is supported by the support member 17 via the bearing 23, and the clutch teeth are provided inside the teeth 20b meshing with the drive gear 16.
20c is formed to face the clutch teeth 19c of the driven gear 19.

In the support member 17 for supporting the propeller shaft 9, the bearing 23 is provided inside the large diameter cylindrical portion 17a at the front portion, and the small diameter cylindrical portion 17a is formed from the center to the rear portion. The propeller shaft 9 is pierced through and supported on the outside, and ribs or walls 17c are radially formed on the outside of the cylindrical portion 17b to form an exhaust passage between them, and the outer peripheral surface of the support member 17 is inside the gear case 5. Is fitted in a predetermined position.

The open end of the cylindrical portion 17a of the support member 17 contacts a washer 24 fitted in a groove on the gear case 5 side, and an O-ring 25 is interposed between the gear case 5 and the open end of the support member 17. Is sealed.

The rear end of the support member 17 is locked and supported by an annular nut 27 screwed into the opening of the gear case 5.

In the propeller shaft 9 rotatably supported by the support member 17 fitted in the gear case 5 as described above, the clutch gear 30 is provided between the front and rear driven gears 19 and 20. Is spline-fitted to the propeller shaft 9 so that the propeller shaft 9 can slide forward and backward and rotate integrally.

The clutch gear 30 includes front and rear driven gears 19 and 20.
Clutch teeth 30a facing the clutch teeth 19c, 20c of the front side of the driven gear 19 when sliding forward.
When it meshes with 19c, it rotates forward together with the driven gear 19, and when it slides backward, on the contrary, it meshes with the clutch teeth 20c of the rear driven gear 20 and rotates in reverse together with the driven gear 20.

Since the rotation of the clutch gear 30 is transmitted to the propeller shaft 9 which is spline-fitted with the clutch gear 30, the propeller shaft 9 rotates forward when the clutch gear 30 moves forward and reversely rotates when it moves backward. , Either front or rear driven gear
When it is located in the center where 19 and 20 are not meshed with each other, the rotation is not transmitted and the neutral state is established.

The clutch gear 30 has a groove 30b formed in the circumferential direction in the front and rear central portion thereof, and as shown in FIG. 4, a large-diameter circular hole 30 penetrating in the diameter direction so as to pass through the groove 30b.
c and a circular hole 30d having a small diameter are formed symmetrically in the direction perpendicular to each other.

A clutch shifter pin 38, which will be described later, is fitted into the large-diameter circular hole 30c by penetrating through the central portion thereof, and the small-diameter circular hole 30c is formed.
A stopper ball 31 having a slightly larger diameter can be engaged with the inner opening of the d by partially retracting it.

A circular hole 9c is formed at a position corresponding to the circular hole 30d of the propeller shaft 9 so that the stopper ball 31 can be retracted and retracted therein.
Is urged to the outside.

As described above, the state in which the stop ball 31 urged outward by the spring 32 is engaged with the circular hole 30d of the clutch gear 30 to lock the clutch gear 30 is the clutch gear.
30 neutral positions.

Therefore, the clutch gear 30 is fixed to the stop ball 31.
When the clutch gear 30 receives a force in the front or rear direction and overcomes the biasing force of the spring 32, the stop ball 31 sinks and disengages, and the clutch gear 30 moves. (See FIGS. 7 and 8).

On the other hand, on the propeller shaft 9, a circular hole is provided from the front to the position of the driven gear 20 on the rear side to form a cylindrical portion 9a at the front, and at the position of the clutch gear 30, a direction perpendicular to the shaft is provided. An elongated hole 9b is formed in the.

A shift slider 40, which is a combination of an outer shift slider 33 and an inner shift slider 34 having a double cylinder structure, is slidably fitted from the front inside the cylindrical portion 9a.

The outer shift slider 33 has a substantially cylindrical shape in which a flange 33a is formed at the front end, and the inner hole forms an elliptical hole 33b having an elliptical cross section at the front portion, and the portion following the elliptical hole 33b. After forming the small circular hole 33c for a short distance, the large circular hole 33d is formed up to the rear end. A long hole 33e that is slightly long in the axial direction and penetrates in the direction perpendicular to the shaft is formed in the rear portion where the large diameter 33b is formed.

On the other hand, the inner shift slider 34 is composed of a front member 35 and a rear member 36 which are screwed to each other. The front member 35 has a flange 35a slightly forward and has a large diameter in front of it. After forming the columnar portion 35b and forming the columnar portion 35c having a diameter slightly smaller than the flange 35a, a short distance is formed, and then the elliptical hole 33b of the outer shift slider 33 is formed.
Is formed with a flat portion 35d, and further to the rear of the flat portion 35d, the small circular hole 33 of the outer shift slider 33 is formed.
A small-diameter cylindrical portion 35e that fits in c is formed.
A male screw 35f is formed at the tip of e.

The rear member 36 has a cylindrical shape slidably fitted in a large-diameter circular hole 33d opened rearward of the outer shift slider 33, and has a male screw 35 of the front member 35 at the front portion.
A female screw 36a to which f is screwed is formed, and a long hole 36b which is slightly elongated in the axial direction and penetrates in the rear direction in a direction perpendicular to the axial direction.
, And a groove 36c for screwdriver is formed on the rear end face.

The front member 35 and the rear member 36 as described above are integrally screwed with each other by their male screw 35f and female screw 36a to form an integral inner shift slider 34. The inner shift slider 34 and the outer shift slider 33 are preliminarily assembled, but a spring 37 is interposed therebetween.

That is, first, the outer shift slider 33
From the front opening of the front member 35 of the inner shift slider 34
Is inserted, and at this time, the flat portion 35d on the front member 35 side is fitted into the oval hole 33b on the outer shift slider 33 side so that their relative rotation is restricted, and the flanges 33a and 35 of both sides are regulated.
A is spaced by the length of the cylindrical portion 35c of the front member 35.

Large diameter circular hole of outer shift slider 33
A small-diameter cylindrical portion 35e of the front member 35 projects from the front inside the 33d, and a coiled spring 37 is fitted between the circular hole 33d and the cylindrical portion 35e to close the rear opening of the outer shift slider 33. As described above, the rear member 36 of the inner shift slider 34 is fitted into the male screw 35f of the front member 35 and the front female screw 36.
When a is aligned and the rear member 36 is rotated and screwed using the groove 36c for screwing on the rear end surface, the spring 37 is pressed against the outer shift slider 33 and the outer shift slider 33. To the front Inner shift slider 34
Urge each other backwards.

The long hole of the outer shift slider 33
The rotation of the rear member 36 is adjusted so that 33e and the elongated hole 36b of the rear member 36 are slightly displaced in the front-rear direction. That is, the elongated hole 36b of the rear member 36 is slightly rearward of the elongated hole 33e of the outer shift slider 33, and the overlapping portion of both elongated holes is adjusted to form a circular hole.

The outer shift slider 33 and the inner shift slider 34, which are assembled in this way, are fitted into the cylindrical portion 9a from the front opening of the propeller shaft 9, and the circular hole where the long holes overlap each other is formed in the propeller shaft 9. The clutch shifter pin 38 is fitted into the long hole 9b and the circular hole 30c of the spline-fitted clutch gear 30 in alignment with each other.

The clutch shifter pin 38 is a clutch gear.
It has a length equal to the inner diameter of the groove 30b provided in the circumferential direction of 30 and prevents the clutch shifter pin 38 from falling off.
The coil 39 is fitted in the groove 30b.

The clutch mechanism is constructed in this way. The clutch shifter pin 38 is a circular hole 30 of the clutch gear 30.
The propeller shaft 9 can be slid forward and backward together with the clutch gear 30 by penetrating the elongated hole 9b with respect to the propeller shaft 9.

In the neutral state, the clutch shifter pin 38 is different from the outer shift slider 33 in that
The elongated hole 33e penetrates along the rear end edge of the elongated hole 33e and has a space between the elongated hole 33e and the front end edge. There is a space between them.

Therefore, since the elongated hole 36b of the inner shift slider 34 has a gap behind the clutch shifter pin 38, when the inner shift slider 34 receives a force in the forward direction, the force does not act directly on the clutch shifter pin 38 and the spring 37 is actuated. Since the force is transmitted to the outer shift slider 33 via the spring force of the spring 37 by compression, the rear edge of the elongated hole 33e of the outer shift slider 33 is in contact with the clutch shifter pin 38, so that the outer shift slider 33 is connected to the clutch shifter pin. It acts to move 38 forward.

That is, when the inner shift slider 34 receives a forward force, the outer shift slider 33 acts on the clutch shifter pin 38 via the spring 37 to exert a force for moving the clutch gear 30 integrated with the clutch shifter pin 38 forward. Work hard.

On the contrary, the long hole 33 of the outer shift slider 33
Since e has a gap in front of the clutch shifter pin 38, when the outer shift slider 33 receives a rearward force, the clutch shifter pin 38 is not directly acted on by the spring.
The force is transmitted to the inner shift slider 34 via the spring force of the spring 37 by compressing 37, and the front end edge of the long hole 36b of the inner shift slider 34 has a clutch shifter pin.
Since it is in contact with 38, the inner shift slider 34 acts to move the clutch shifter pin 38 rearward.

That is, when the outer shift slider 33 receives a rearward force, the inner shift slider 34 acts on the clutch shifter pin 38 via the spring 37 to move the clutch gear 30 integrated with the clutch shifter pin 38 rearward. Works.

As described above, since the clutch gear 30 is positioned in the neutral state with respect to the propeller shaft 9 by the stop ball 31, the spring force of the spring 37 works on the clutch shifter pin 38 to cause the stop ball 31 to project. When the urging force of the spring 32 is overcome, the stop ball 31 sinks and disengages, the clutch gear 30 vigorously moves in the front-rear direction, and a so-called detent mechanism that meshes with either of the driven gears 19 and 20 is formed. There is.

The detent mechanism smoothly engages the clutch. FIG. 7 is a diagram showing a forward traveling state in which the clutch gear 30 meshes with the front driven gear 19, and FIG. 8 is a diagram showing a reverse traveling state in which the clutch gear 30 meshes with the rear driven gear 20.

Next, an operation mechanism for moving the outer shift slider 33 or the inner shift slider 34 will be described.

The front cylindrical portion 35b of the front member 35 of the inner shift slider 34 is a cylindrical portion 5 formed on the gear case 5.
a is slidably fitted into and supported by a, and a flange 35 of the inner shift slider 34 is provided between the cylindrical portion 5a and the propeller shaft 9.
a and the flange 33a of the outer shift slider 33 are located with a predetermined gap, and both flanges 35a and 33a
A shift fork 50, which is bifurcated from above so as to be sandwiched between the two, straddles.

Above the shift fork 50, a substantially cylindrical housing or support member 51 is fitted and supported from above in an opening 5c having a slightly smaller diameter at the lower end of a circular hole 5b formed in the gear case 5. There is.

The support member 51 has a small diameter circular hole 51a in the upper half portion,
A large-diameter circular hole 51b is formed in the lower half so as to penetrate in the vertical direction, a small-diameter lateral hole 51c is formed in the upper half, and a lateral hole 51d is formed in the vicinity of the lower end of the lower half so as to be parallel to the propeller shaft 9. It is installed and formed so that.

A knock pin 52 for positioning the support member 51 is fitted in one of the upper lateral holes 51c so as to project partially outward, and the lower end opening 5c of the circular hole 5b of the gear case 5 is fitted.
The knock pin 52 is formed in the groove 5d formed on the upper portion of the rear edge of
Is inserted from above to position the support member 51. The diameter of the other upper side lateral hole 51c is small near the outer surface, and the spring 53 is inserted into the lateral hole 51c from the inside and then the holding ball 54 is fitted therein.

A cylindrical eccentric pin holder 55 is rotatably fitted in the circular hole 51a of the support member 51. The eccentric pin holder 55 has the lower end of the shift rod 10 fitted in the inside of the cylinder and is rotatable integrally with the shift rod 10. The neutral position is determined by the holding ball 54 formed at a predetermined side surface position. This is performed by engaging the lateral hole 55a.

The lower end 55b has a bulging portion 55c which has a large outer diameter and bulges rightward in the neutral state, and a rod-shaped eccentric pin 56 is fitted on the bulging portion 55c at the upper portion thereof and is directed downward. It is installed vertically.

The eccentric pin holder 55 has a support member 51.
It is fitted into the circular hole 51a from below, and is locked by the locking piece 58 via the washer 57 to the portion exposed upward, and is rotatably held by the support member 51.

On the other hand, a shift fork guide pin 59 is installed in the lower lateral hole 51c of the support member 51 in parallel to the propeller shaft 9, and the upper portion of the shift fork 50 is penetrated by the shift fork guide pin 59 and slid back and forth. It is movably supported.

The sliding portion 50a of the shift fork 50 has a groove 50b circumferentially oriented on the outer peripheral surface thereof, and an eccentric pin vertically mounted on the eccentric pin holder 55 on the right side of the groove 50b. 56 is engaged.

The clutch operating mechanism has the above-described structure. In the neutral state, the eccentric pin 56 is located on the rightmost side, and when the shift rod 10 is rotated counterclockwise when viewed from above, The eccentric pin 56 pivots counterclockwise via the eccentric pin holder 55 to slide the shift fork 50 forward.

When the shift fork 50 slides forward, the shift fork 50 moves the inner shift slider 34 forward. Therefore, as described above, the clutch gear is moved.
The detent operation of 30 causes the forward driven gear 19 to mesh with the forward driven gear 19 as shown in FIG. 7 to transmit the positive rotation to the propeller shaft 9. The forward rotation of the propeller 7 allows the boat S to move forward.

On the contrary, when the shift rod 10 is rotated clockwise as viewed from above, the eccentric pin 56 pivots clockwise and slides the shift fork 50 rearward so that the shift fork 50 moves.
Causes the outer shift slider 33 to move rearward, and as described above, the clutch gear 30 detents and meshes with the driven gear 20 on the rear side to transmit reverse rotation to the propeller shaft 9, as shown in FIG. The boat S can be moved backward by the reverse rotation of the propeller 7.

The clutch mechanism of this embodiment has the structure as described above, and when assembled, the outer shift slider 33 and the inner shift slider 34 are assembled in a small amount as described above in advance, and at that time, simply Can be sub-assembled.

Then, the clutch gear 30 is spline-fitted to the propeller shaft 9, the clutch gear 30 is positioned at the neutral position by the stopper ball 31, and then the outer shift slider 33 and the inner shift slider 34, which have been assembled in small numbers, are propeller-mounted from the front. It is fitted in the cylindrical portion 9a of the shaft 9, the long holes 33e and 36b are aligned with the long hole 9b of the propeller shaft 9 and the circular hole 30c of the clutch gear 30, the clutch shifter pin 38 is passed through, and is supported by the coil 39. .

In this way, the outer shift slider 33,
The front driven gear 19 is borne on the front end of the propeller shaft 9 in which the inner shift slider 34 and the clutch gear 30 are combined.
A front member of the inner shift slider 34 is rotatably fitted to the inner shift slider 34 via a rear opening, and a bearing 22 is interposed between the driven gear 19 and the gear case 5.
The front cylindrical portion 35b of 35 is fitted in the cylindrical portion 5a in advance.

Then, with the drive gear 16 meshed with the driven gear 19, the vertical shaft 8 is inserted into the gear case 5 from above via the bearing 15 and the drive gear 16 is fitted to the lower end portion. Next, the driven gear 20 is fitted into the propeller shaft 9 and meshed with the drive gear 16, and the washer 24 is inserted and the bearing 23 is fitted, and the O ring is inserted.
25, the support member 17 is inserted into the gear case 5 while the propeller shaft 9 is fitted into the gear case 5 via the bearing 18, and the rear opening of the gear case 5 is covered with the sealing material 27 so that the closing member 26 is closed. Screw and close.

Then, the ball held in the neutral state in advance
Rotatable shift rod 10, which is positioned by 54 and assembled to the support member 51 to form a unit, an eccentric pin holder
When the 55, the eccentric pin 56, the shift fork guide pin 59, the shift fork 50, etc. are inserted into the circular hole 5b in the gear case 5 from above, and the knock pin 52 is inserted so as to fit into the groove 5d, the shift fork A fork portion bifurcated into 50 is engaged so as to straddle the flanges 33a and 33b of the outer shift slider 33 and the inner shift slider 34.

As described above, it can be easily assembled. In addition, the rotary shift rod 10 rotates about the vertical direction,
Since the rotation direction is different from the mounting direction (downward) of the support member 51 to the gear case 5, the mounting method can be as simple as that.

When the shift rod 10 is rotated in the counterclockwise direction, the clutch gear 30 is detented forward and smoothly meshes with the driven gear 19 on the front side (see FIG. 7). When the shift rod 10 is rotated clockwise, the clutch gear 30 is detented rearward to smoothly mesh with the rear driven gear 20 (see FIG. 8) and the propeller shaft 9 is rotated in the reverse direction. It can be reverse.

By the way, when two outboard motors are arranged side by side in the stern, one of them is a base specification, and the other one is a base specification so that the directions of the propeller blades are opposite to each other in order to balance the left and right, and the other is opposite. It may be set to counter specifications.

When the outboard motor of the present embodiment is used as a base specification and a counter specification outboard motor is manufactured, the outboard motor of the base specification moves its clutch gear 30 forward to move the front driven gear. When meshing with 19, the counter-specific outboard motor moves its clutch gear backwards and meshes with the driven gear on the rear side, and the counter-specific propeller rotates in reverse while the base-specific propeller 7 rotates forward. I have to do it.

Therefore, in the outboard motor of this embodiment, the eccentric pin holder 55 fitted to the lower end of the shift rod 10 may be fitted to a position rotated by 180 degrees with respect to the base specifications. That is, when the eccentric pin holder 55 is fitted to the shift rod 10 at a position rotated by 180 degrees, the eccentric pin 56 held by the eccentric pin holder 55 in the neutral state is shown in FIGS.
As shown in the figure, the groove 50b on the left side of the shift fork 50 is located on the left side opposite to the base specification with respect to the turning center axis.
Engage with.

Therefore, when the shift rod 10 is rotated counterclockwise, the base specification moves the shift fork 50 forward, while the counter specification moves backward, so that the clutch is moved through the shift sliders 33 and 34. The gear can be engaged with the driven gear on the rear side to reversely rotate the propeller. If the shift rod 10 is rotated clockwise, the counter specification can move the shift fork 50 forward and rotate the propeller forward.

As described above, the counter-specific outboard motor can be easily constructed by using all the same members except the propeller.

[0077]

According to the present invention, the support member can be assembled in the casing in a unitized state in which the shift fork, the guide member and the rotary rod member are assembled in a small unit.
The movable parts of the operation system can be supported reliably and workability is good.

Further, since the shift slider assembled in advance at the time of the assembling is engaged with the shift fork of the supporting member unitized by assembling the rotary shift rod or the like so as to straddle from above. It can be securely fixed to the gear case and the assembly work becomes easier.

According to the second aspect of the present invention, the supporting member is provided with the positioning means for holding the shift fork at the neutral position, so that the shift fork can be easily mounted on the shift slider when the supporting member is fitted into the gear case fitting portion. The fork engaging portion can be engaged.

According to the third aspect of the present invention, the groove is formed in the gear case fitting portion and the projection provided on the support member is fitted into the groove, whereby the positioning of the support member with respect to the gear case can be facilitated.

According to the fourth aspect of the invention, the rod engaging portion of the shift fork can be engaged with the rod member in the state where the shift fork is inverted, so that both the base specification and the counter specification can be easily supported. You can

[Brief description of drawings]

FIG. 1 is a side sectional view showing an overall schematic structure of an outboard motor according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the same main part.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV in FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a cross-sectional view showing a state in which the clutch is engaged in the forward drive position.

FIG. 8 is a transverse cross-sectional view showing a state in which the clutch is engaged in the reverse position.

FIG. 9 is a sectional view of a clutch operating device for an outboard motor having a counter specification.

10 is a sectional view taken along line XX in FIG. 9.

[Explanation of symbols]

1 ... Outboard motor, 2 ... Latch device, 3 ... Engine cover, 4 ...
Case part, 5 ... Gear case, 6 ... Engine, 7 ... Propeller, 8 ... Vertical shaft, 9 ... Propeller shaft, 10 ... Shift rod, 15 ... Bearing, 16 ... Drive gear, 17 ... Support member, 18 ... Bearing, 19 , 20 ... Driven gear, 21, 22, 23 ... Bearing, 24 ... Washer, 25 ... O-ring, 27 ... Nut, 30 ... Clutch gear, 31
… Stop ball, 32… Spring, 33… Outer shift slider, 34… Inner shift slider, 35… Front member, 36… Rear member, 37… Spring, 38… Clutch shifter pin, 39… Coil, 40… Shift slider, 50 ... shift fork, 51 ... support member, 52 ... knock pin, 53 ... spring, 54 ... holding ball, 55 ... eccentric pin holder, 56 ...
Eccentric pin, 57 ... Washer, 58 ... Locking piece, 59 ... Shift fork guide pin.

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[Procedure amendment]

[Submission date] July 28, 1993

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[Figure 8]

Claims (4)

[Claims] 1. A propeller shaft having a propeller at one end is rotatably supported in a gear case, and a pair of front and rear forward-moving gears and reverse gears are rotatably supported by the propeller shaft. In a drive transmission device for a marine propulsion device, wherein a clutch gear that rotates together with a propeller shaft and is slidably supported in the front and rear directions is clutch-engaged with one of the pair of gears to rotate the propeller in a forward or reverse direction to advance or reverse the ship. A shift slider that is slidable in the propeller shaft in the axial direction and that moves the clutch gear via a clutch shifter pin that penetrates the propeller shaft; and an operating member that can operate the shift slider from above the gear case. And a shifter for engaging the fork engaging portion of the shift slider to move the shift slider. A fork, a guide member for movably supporting the shift fork in a predetermined direction, a rotatable rod member for moving the shift fork by engaging a rod engaging portion of the shift fork, and a vicinity of a lower end of the rod member And a support member fixedly supporting the guide member and sub-assembled so as to transmit the rotation of the rod member to the movement of the shift fork, the support member being a predetermined part of the gear case. The marine vessel is characterized in that the shift fork is engaged with the fork engaging portion of the shift slider by fitting the fitting portion from above and the operation drive of the rod member is transmitted to the shift slider. Propulsion drive transmission device. 2. The drive transmission device for a marine propulsion device according to claim 1, wherein the support member has a positioning means for holding the shift fork at a neutral position. 3. The positioning of the support member with respect to the gear case is performed by fitting a projection provided on the support member into a groove formed in the fitting portion of the gear case in the vertical direction. The drive transmission system for a marine vessel propulsion device according to claim 1 or 2, wherein 4. The drive device for a marine propulsion device according to claim 1, wherein the rod engaging portion of the shift fork can engage the rod member with the shift fork being inverted. Transmission device.