JPS58126289A - Shift device for inboard and outboard engine - Google Patents

Abstract

PURPOSE:To ensure shifting forward and backward by fitting a top expanded part of a shift arm operated by a remote control cable into a fork within the range of standard oscillation to complete clutch shifting and releasing it outside this range. CONSTITUTION:When an inner 38 of a remote control cable 34 moves from a neutral position to a forward side or a backward side, a shift arm 43 is oscillated. Within the range of the stroke of the cable 34 corresponding to a standard oscillation range, the displacement of a shift fork 45 is changed linearly to complete the shift operation. At this completion, a pawl part 26B or 26C of a clutch 26 is advanced to engage with a pawl part 24A of a forward gear 24 or a pawl part 25A of a backward gear 25 to a rotate a drive shaft 27 forward or backward. When the shift fork 45 reaches the shift end, an expanded part 46 of the shift arm 43 is released from an engaged face 49A or 49B of the fork 45 for running idle in oscillation. This construction permits to shift clutch without fail even if the stroke of the remote control cable is changed.

Description

[Detailed description of the invention] The present invention relates to a shift device for an inboard/outboard motor.

The shift fork is displaced by the stroke of the conventional remote control cable, and the clutch engaged by the shift fork can be selectively shifted from the neutral position to the forward position where it engages with the forward gear or the reverse position where it engages with the reverse gear. In a shift device for an inboard/outboard motor, the amount of displacement of the shift fork, that is, the amount of displacement of the clutch, can vary approximately within a line with respect to the stroke of the remote control cable.

Therefore, in the above shift device, if the stroke of the remote control cable is excessive, the clutch will hit the forward gear or reverse gear during the stroke of the remote control cable, and an excessive load will be applied to the remote control cable and its link mechanism. There is a risk that On the other hand, if the stroke of the remote control cable is too small, the meshing allowance between the clutch and the forward gear 1 will be too small, and the contact pressure between them will increase, causing damage to the claws of both. There is a fear. That is, the stroke of the remote control cable must always be set to a predetermined stroke. However, the actual stroke of the remote control cable is
Since it gradually decreases due to cable elongation, wear and play of the link mechanism, etc. with use, it is necessary to readjust it or replace the link mechanism components from time to time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shift device for an inboard/outboard motor that can reliably shift a clutch to a constant forward position or reverse position #L even if the stroke of a remote control cable changes.

In order to achieve the above object, the present invention moves a shift fork that can be interlocked with the shift arm linearly in the fork axis direction by swinging a shift arm to which a remote control cable is connected, and the shift fork is engaged. The engaged clutch is selectively shifted from the neutral position to the forward position where it engages with the forward gear to the reverse position where it engages with the reverse gear, and the clutch moves the drive shaft integrated in the rotational direction forward (b).
In a shift device for an inboard/outboard engine that allows reverse rotation, a rolling pin is formed by forming a bulge at the tip of the shift arm, and by forming a pair of retaining portions at two positions in the fork axis direction of the shift fork. In a predetermined reference swing range centered on the neutral position of the arm, the bulge can be held between the engaging surfaces of the two image matching parts, and outside the reference swing range of the shift arm, the bulge The protruding portion is detachable from between the engagement surfaces of the inner and outer fitting portions, and the clutch is configured to complete the shifting by movement of the shift fork corresponding to the reference swing range of the shift arm.

Embodiments of the present invention will be described below with reference to the drawings.

tJ1 is a side view showing an inboard/outboard motor to which an embodiment of the present invention is applied, FIG. 2 is a schematic side view showing its power transmission mechanism, and FIG. 3 is a side view showing the I of FIG. −1, IiK:
4 is a sectional view taken along W-W1MK in FIG. 3, FIG. 5 is a sectional view taken along W-W1MK in FIG. FIG. 7 is a cross-sectional view showing different operating states in the figure, and FIG. 7 is a diagram showing the relationship between the sono-remote control cable stroke and the shift fork displacement amount.

The clamp bracket 12 [u, which is fixed to the stern plate 11 of the hull, and the swivel bracket 1 via the rotating wheel 13t.
4 is rotatably supported around a substantially horizontal axis. The cylinder 1515V of the swivel bracket 14 supports the propulsion unit 16 so as to be rotatable about an axis perpendicular to the rotation axis 13 via a rotation wheel (not shown). That is,
The propulsion unit 16 is connected to the cylindrical portion 1 of the swivel bracket 14.
5 as the center of rotation, and can be tilted up or down with the rotation axis 13 of the clamp bracket 12 as the center of rotation.

A lock plate 18 is swingably supported on the cylindrical portion 15 of the swivel bracket 14 via a pin 1T. The front end of the lock plate 18 can be engaged with a tilt lock rod 19 held by the clamp bracket 12. The rear part of the lock plate 18 is formed into an upright part 20 that stands up along the rear surface of the cylindrical part 15.
A spring 21 is interposed between the lower end of the cylindrical portion 15 and the upper end of the cylindrical portion 15. That is, the lock plate 18 is given a biasing force in the counterclockwise direction in FIG. . Further, by rotating the lock plate 18t clockwise by operating a tilt lever (not shown), the lock plate 18 is released from the tilt lock rod 19, and the propulsion unit 16 rotates around the rotation shaft 13. It is said that it is possible to move and tilt up.

The output of an engine (not shown) housed in the hull is provided by a double cardan joint 22, an input gear 23, and a forward gear 2.
4 or through the reverse gear 25, clutch 26, drive shaft 27, bevel gear 28, and output shaft 29 to the propeller 30. In other words.

The shift device described below engages the clutch 261r that is spline-coupled to the drive shaft 2T, and either the forward gear 24 or the reverse gear 25 that is engaged with the input gear 23, so that the drive shaft 27 and The propeller 30 can be rotated forward and then backward.

A window 31 is opened on one side of the propulsion unit 16, and a shift case 32 is attached to the window 31. A holding plate 33 is attached to the shift case 32, and an outer 35 of a remote control cable 34 is locked to the holding plate 33. Note that the retaining plate 33 has screws 33Atl-
A cover 338 is placed therethrough.

Further, on one side of the propulsion unit 16, a lower V of the window 31 is provided.
Ctrl and a shift lever 36 are fixed to a shaft 37 rotatably supported on the side surface of the propulsion unit 16. An inner 38 of a remote control cable 34 is locked to the rear end of the shift lever 36. That is, with respect to the neutral position shown in FIG. 1, when moving forward, the inner 38 of the remote control couple 34 protrudes from the state shown in FIG.
rotates clockwise, and during primary reverse movement, the inner 38 is retracted and the shift lever 36 rotates counterclockwise.

During this backward movement, the locking member 39 fixed to the shaft 37 also rotates counterclockwise together with the shift lever 36.
The tip of this locking member 39 is located behind the upright portion 20 of the locking plate 18, restricts the rotation of the locking plate 18, prevents the tilt-out mechanism from opening when traveling backwards, and prevents the propulsion unit 16 from facing backward. The propulsion force can be transmitted to the hull.

A bin 40 is rotatably supported on the shift case 32.
An intermediate arm 41 is fixed to the externally protruding end of the bin 40,
The intermediate arm 41 is connected to the approximate center of the shift lever 36 via a connecting rod 42t. A shift arm 43 is fixed to the internally protruding end of the bin 40. On the other hand,
A guide shaft 44 is fixedly arranged in the shift case 32 so as to be perpendicular to the bin 40 and parallel to the drive shaft 27 . A shift fork 45 is mounted on the guide shaft 44 so as to be able to reciprocate. The shift arm 43 is engaged with the shift fork 45Vc as will be described in detail below, and the seven-way portion 45A of the shift fork 45 is engaged with the ring groove 26A of the clutch 26. That is, the stroke of the inner part 38 of the remote control cable 34 causes the shift lever 36, the connecting rod 42, and the intermediate arm 41 to
When the shift arm 43 swings, the shift fork 45 with which the shift arm 43 is engaged moves linearly in the fork axial direction, and the pawl 11268 of the clutch 26 or the pawl portion 26G
is engaged with the claw portion 24^ of the forward gear 24 or the claw portion 25A of the reverse gear 25, so that the drive shaft 27 can rotate forward or backward.

Here, the engagement structure between the shift arm 43 and the shift fork 45 is as follows. That is, a bulge 46 is formed at the tip of the shift arm 43, both surfaces of the bulge 46 serve as locking surfaces 47A and 47B, and the tip surface of the bulge 46 is centered on the axis of the bottle 40. Outer cylindrical surface 47 with radius R1
It is said to be G.

On the other hand, a pair of retaining portions 48A and 48B are formed at the second position Ii in the fork axial direction of the shift fork 45, and each retaining portion 4
8A, 488, the bulging portion 46 of the shift arm 43
The inner grandstand surface 47A is formed in .

41B, and an inner cylindrical surface that is provided with a radius R2 equivalent to the outer cylindrical surface 47C of the bulged portion 46 and is capable of sliding contact with the outer cylindrical surface 47C. 50A and 50B are provided. Furthermore, in a predetermined reference swing range on the forward and reverse sides centering on the neutral position of the shift arm 43 shown in FIG. 49A and 49B, and by moving the shift fork 45 in this range, the claw portion 26B and then the claw portion 26G of the clutch 26 are moved to the claw portion 24A of the forward gear 24 or the claw portion of the reverse gear 25. 25
It is possible to complete the shift operation to engage A. Furthermore, outside the reference swing range of the shift arm 43, as shown in FIG.
47B is the authenticity of the shift fork 45, 49A, 49B
The outer cylinder @47C of the bulging portion 46 slides on one of the inner cylindrical surfaces 50A and 50B of the shift fork 45, and the shift arm 43 moves beyond the reference swing range. When the shift fork 45 swings, the shift fork 45 remains at its forward or reverse moving end, and only the shift arm 43 is allowed to vibrate.

Next, the operation of the above embodiment will be explained with reference to FIG. 7, which shows the relationship between the stroke R of the remote control cable 340 on the horizontal axis and the displacement H of the shift fork 45 on the vertical axis. When the inner 3B of the remote control cable 34 protrudes from its neutral position toward the forward direction or is pulled into the reverse direction, the diad arm 43 vibrates as the inner 38 moves.

Within the stroke range of the remote control cable 340 corresponding to the reference swing range S of the shift arm 43, the displacement amount of the shift fork 45 changes linearly with respect to the stroke of the remote control cable 34, and the amount of displacement of the shift fork 45 changes linearly with respect to the stroke of the remote control cable 34, and The vehicle reaches point P, which is the end of movement on the reverse side, and completes the shift operation.

When this shift operation is completed, the pawl portion 26 of the clutch 26
In B, the pawl portion 26C engages with the pawl portion 24^ of the forward gear 24 or the pawl portion 25^KjLffK of the reverse gear 25 to rotate the drive shaft 27 forward or backward. After the shift 7 oak 45 reaches the above-mentioned moving end, when the remote control cable 34 further increases its stroke, the shift arm 43
The shift fork 45 reaches the final point Q without any displacement.

That is, in the above embodiment, if the stroke of the remote control cable 340 corresponding to the reference swing range of the shift arm 43 is set as the minimum set stroke, as long as the actual stroke of the remote control cable 34 exceeds the minimum set stroke E. , even if the stroke is reduced from the original due to use, the shift fork 4
5Fi always moves by the required amount, and the clutch 26 can always be shifted by the required amount. In addition, the remote control cable 34
A stroke that exceeds the above-mentioned minimum setting stroke will not cause excessive load to be applied to the remote control cable 34 and the reversing mechanism, and the clutch 26 will not hit the forward gear 24 or the reverse gear 25.

As described above, in the Honjitsu I14, the shift fork, which can be interlocked with the shift arm, is moved linearly in the fork axis direction by the swinging of the shift arm to which the remote control cable is connected, and the shift fork is engaged. The clutch selectively shifts from a neutral position to a forward position where it engages with a forward gear or a reverse position where it engages with a reverse gear, thereby enabling the drive shaft with which the clutch is integrated in the rotational direction to rotate forward or backward. In a shift device for an inboard/outboard motor, a bulging portion is formed at the tip of the shift arm, and a pair of retaining portions are formed at two positions in the fork axial direction of the shift fork,
In a predetermined reference swing range of the shift arm at the center of the neutral position tube, the bulge can be clamped between the engagement surfaces of the internal fitting part, and outside the reference swing range of the shift arm, the bulge The part is removable from between the retaining surfaces of the inner joint part, and the clutch is configured to complete the shift by movement of the shift fork corresponding to the reference swing range of the shift arm, so that the stroke of the remote control cable is reduced. Even if the shift fork changes, the shift fork can always move by the required amount9, making it possible to reliably shift the clutch to a fixed forward or reverse position.

[Brief explanation of the drawing]

Fig. 111 is a Confucian diagram showing an inboard/outboard motor to which an embodiment of the present invention is applied, Fig. 2 is a schematic Confucian diagram showing its power transmission mechanism, and Fig. 3 is a - drawing line of Fig. 111. Cross-sectional view along line 4
The figure is a sectional view taken along N-*1lVc of the iEs diagram, FIG. 5 is a sectional view taken along V-V*vc of FIG. 3, FIG. 6 is a sectional view showing different operating states of FIG. It is a diagram which shows the relationship with the remote control cable stroked shift fork displacement amount. 24...forward gear, 25...reverse gear, 2
6...Clutch, 27...Drive shaft, 34-
...Remote control cable, 38°° inner, 4
3°°°shift arm, 44... fork shaft, 4
5--Shift fork, 46--Bulging portion, 47A,
41B... - engaging surface, 47C... outer cylindrical surface,
48A, 48! I...Engaging portion, 49A, 41B-...
Retaining surface, 50A, 50B...inner cylindrical surface. Agent Patent Attorney Osamu Shiokawa Figure 2 Figure 3 N = Figure 4 Procedural Amendment (February 1982) Commissioner of the Japan Patent Office 6th Indication of the Case 1982 Hand-held Application No. 007570 2 Name of the Invention Shift device 3 for inboard/outboard motors, relationship with the amended case Name of patent applicant (AO7) Yamaha Motor Co., Ltd. 4 Agent 〒
105' Address No. 23 Mori Building, 8th floor, 23-7, Toranomon-chome, Minato-ku, Tokyo 6, 11 Number of inventions increased by 7 Drawings to be amended & Contents of amendment (1) As shown in the attached sheet In Figures 2 and 4,
24” to “25”, “24^Jtr25A”, “2
5" to "24" and r25AJ to r24Aj. that's all

Claims (1)

[Claims] (1) By swinging the shift arm to which the remote control cable is connected, the shift fork, which can be interlocked with the shift arm, is moved linearly in the fork axis direction, and the clutch engaged by the shift fork is moved from the neutral position. Forward position that meshes with the forward gear or reverse position t that meshes with the reverse gear
In a shift device for an inboard/outboard engine that selectively shifts the drive shaft to which the clutch is integrated in the rotational direction, the drive shaft can be rotated forward or backward.
A pair of retaining parts are formed at two positions in the fork axial direction of the shift fork, and in a predetermined standard swing range centered on the neutral position of the shift arm, the bulging part The bulging portion can be held between the engaging surfaces of the true and false fitting portions, and when the shift arm is outside the reference swing range, the bulging portion can be detached from between the engaging surfaces of the image matching portions, and the shift arm can be held between the engaging surfaces. A shift device for an inboard/outboard motor, characterized in that the clutch completes the shift by movement of a shift fork corresponding to the above reference range.