JPS6053495A - Straight advance holder of outboard engine - Google Patents

Abstract

PURPOSE:To allow the straight advance travel even with a hand kept off a steering handle by inserting an elastic member between a rotary portion in one body with a propelling unit and a bracket and applying to the propelling unit the returning habit to the straight advance position. CONSTITUTION:A clamp bracket 34 as a hull side bracket protrudes pins 52a, 52b near a tilt shaft, and tensile coil springs 56a, 56b are suspended between the pin 54 of a steering bracket 46 and the pins 52a, 52b. For example, when a steering handle is rotated counter-clockwise, the steering bracket 46 and a propelling unit are rotated in one body in the same direction, and the spring 56a is shrunk and the spring 56b is extended. Thereby, a recovery force to the original straight advance position direction is generated in the steering bracket 46 and the propelling unit. Accordingly, the straight advance travel can be performed with a hand kept off the handle.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a straight-line holding device that gives a propulsion unit of an outboard motor a tendency to return to a straight-line position.

The propulsion unit of the outboard motor is supported by a swivel bracket fixed to the hull so that it can be steered left and right.

With conventional outboard motors, the propulsion unit is designed to rotate freely left and right, so the steering wheel must be held in hand at all times while sailing, allowing the boat to travel straight at a constant speed on a calm, horizontal surface. There is also the inconvenience of not being able to take one's hands off the steering wheel even when doing so.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a straight-line holding device for an outboard motor that allows the outboard motor to travel straight ahead without having to take one's hands off the steering wheel.

To achieve this object, the present invention provides an outboard motor in which a propulsion unit is supported on a bracket fixed to the hull so that it can be steered left and right. A member is interposed to give the propulsion unit the habit of returning to the straight-ahead position. The present invention will be described in detail below based on the illustrated embodiments.

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 4 is a plan view showing the operation. be.

In FIG. 1, the reference numeral 10 is a propulsion unit, and the upper casing 12. Lower casing 14. It is equipped with an engine 16 and the like. The engine 16 is covered with a bottom cowling 18 and a top cowling 20. The rotational output of the engine 16 is transmitted through a substantially vertical drive shaft 22. Forward/reverse gear group 24. It is transmitted to the propulsion propeller 28 via a substantially horizontal propeller shaft 26.

3o is a swivel bracket, which is held on a clamp bracket 34 (34a, 34b) by a substantially horizontal tilt axis 32, as shown in FIG. 2, and this clamp bracket 34 is fixed to a stern plate 36. Swivel bracket 30 is normally locked in the FIG. 1 position by a tilt lock mechanism (not shown).

Steering shaft cylinder 3 integrally formed with swivel bracket 30
At 8, a steering shaft 40 is rotatably held, and the propulsion unit 10 is attached to the rear ends of connecting arms 42 and 44 fixed to both upper and lower ends of the steering shaft 40, respectively. A steering bracket 46 is further fixed to the upper end of the steering shaft 40. This steering bracket 46 is connected to the swivel bracket 30. and extends above the clamp bracket 34. 48 is a steering handle extending forward (inboard direction) from this steering bracket 46.

The straightness holding device 50 according to the present invention is mounted between the clamp bracket 34 as a hull-side bracket and the steering bracket 46 as a rotating part. That is, while the pins 52 (52a, 52b) are protrudingly provided near the clamp bracket 34 and the tilt shaft 32,
A pin 54 is provided protruding from the center of the lower surface of the steering bracket 46, and a tension coil spring 56 (56a) as an elastic member is provided between the nine pins 52 and 54.

56b) is stretched. Springs 56a and 56b are of the same strength and length. Also, the bin 54 is the steering shaft 4
When the propulsion unit 10 is steered, both pins 52. '54
Now it doesn't interfere.

In this embodiment, the handle 48 is rotated counterclockwise in FIG.
When turned in the direction of the arrow θ in the figure, the steering bracket) 46. ! The steering unit 10 integrally rotates in the same direction G, causing the spring 56a to contract and the spring 56b to extend. Therefore, the steering bracket 46
．． The propulsion unit 10 generates a restoring force in the direction of the original straight-ahead position, that is, the propulsion unit 10 always has a tendency to return to the straight-ahead position. Therefore, even if the handle 48 is released, the propulsion unit 10 is maintained in the straight-ahead position.

It becomes possible for the ship to sail straight ahead.

In this embodiment, since the bin 52 on the clamp bracket 34 side is provided near the tilt axis 32, the tilt lock (not shown) can be released and the propulsion unit 10. Swivel bracket 30
Even if you rotate it upward around the tilt axis 32 and lift it up (
tilt up), h.

Changes in the relative positions of the springs 52 and 54 are reduced, and the springs 56 are less likely to be overstretched or forced to bend.

FIG. 5 is a plan view of a main part of another embodiment, and in a straight motion holding device 50A of this embodiment, an arc-shaped long groove 60 centered at 40 about the steering shaft is formed in the steering bracket 46A, and a pin 5
4 is slidably held in this long groove 60. Also, this steering bracket) 46A has a pair of slide rails 62 (
62a, 62b), a sliding member 64 is attached between the slide rails 62, and an engagement groove 66 provided in this member 64 can be engaged with and detached from the pin 54.

In this embodiment, the sliding member 64 is slid by an unillustrated operator (preferably provided on the handle 48), and the engaging groove 64 is slid.
When the pin 54 is engaged with the engagement groove 66, the pin 54 is locked and generates the function of maintaining straight movement as in the embodiments shown in FIGS. 5 state) Since the pin 54 moves freely within the long groove 60,
The straight-ahead holding function no longer occurs. That is, by moving the slider 64, it is possible to select whether to activate or deactivate the linear motion holding device 50A.

In each of the above embodiments, the clamp bracket 34 was used as a bracket fixed to the hull side, and the steering handles 46 and 46A were used as rotating parts integral with the propulsion unit 10, but the elastic member of the present invention is not limited to these members. Of course, it is not limited to providing it between the two.

As described above, the present invention interposes an elastic member between the bracket fixed to the hull side and the rotating part of the propulsion unit side, giving the propulsion unit the habit of returning to the straight-ahead position. This has the effect of making it possible to sail straight ahead while covered.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is an exploded perspective view of essential parts, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 4 is a side view of an embodiment of the present invention.
The figure is an explanatory view of the operation, and FIG. 5 is a plan view of the main part of another embodiment. 10... Propulsion unit. 34... Clamp bracket on the hull side. 46... Steering handle as a rotating part. 56...Coil spring as an elastic member. Patent applicant Sanshin Kogyo Co., Ltd. Agent Patent attorney Yama 1) Wen Xiong Fig. 1 Fig. 2 Fig. 7 stones

Claims (1)

[Claims] An outboard motor in which a propulsion unit is supported on a bracket fixed to the hull side so that it can be steered left and right. A straight-line holding device for an outboard motor, characterized in that an elastic member is interposed between a rotating portion integral with the propulsion unit and the bracket to give the propulsion unit a tendency to return to a straight-line position.