JPH0310157Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a handle device for an outboard motor, and more specifically, to a handle device for an outboard motor that is provided with vibration isolation.

FIG. 1 shows a typical outboard motor. This outboard motor consists of a fixed part 3 consisting of a clamp bracket 1, a swivel bracket 2, etc. that are integrally fixed to the hull, and an outboard motor main body 4 that rotates around the swivel bracket 2. . The outboard motor main body 4 has a drive shaft housing 5 as its center, an engine 6 and a lower cover 7a of an engine cover 7 are fixedly installed on the upper surface of the housing, a steering bracket 8 is fixedly installed on the upper side of the housing 5, and further A gear case 9 is fixedly installed on the lower surface of the housing 5. In this outboard motor, a bracket 5 disposed on the lower side of the drive shaft housing 5
A swivel bracket 2 is positioned between the swivel bracket 2 and the steering bracket 8, and the outboard motor main body 4 is rotatably installed with a pilot shaft 10 interposed between the swivel bracket 2 and the steering bracket 8. Additionally, an upper mount 11a and a lower mount 11b are installed between the drive shaft housing 5 and the steering bracket 8 and between the housing 5 and the pilot shaft 10.
are interposed to prevent vibrations caused by the engine 6 from being transmitted to the steering bracket 8. The handle 12 is fixedly installed on the side of the steering bracket 8, as shown in FIG. Note that an air intake port 13 is formed in the lower cover 7a to introduce a portion of the air to be supplied to the engine 6 into the engine cover 7. In this air intake port 13, a rib 14 is formed on the edge of the opening to project outward, and this rib 14 is fitted into a rib 15 formed on the steering bracket 8 to form a labyrinth there to prevent water from entering. It is prevented.

By the way, in such an outboard motor, as described above, the atsupa mount 11a and the lower mount 1
1b prevents the vibration of the engine 6 from being transmitted to the handle 12,
When the engine 6 was operated at low speed, sufficient effect could not be obtained, and the vibrations of the engine 6 were transmitted to the handle 12, resulting in an unpleasant shaking feeling in the hands. This is because in the low-speed operating range of the engine 6, uneven rotation tends to occur due to poor combustion, etc., and furthermore, in this operating range, the pilot shaft 10 is only subjected to a large load in the thrust direction, so the pilot shaft 10 by the engine 6 is This seems to be because the upper mount 11a and the lower mount 11b cannot absorb the vibration in the direction in which the outboard motor main body 4 rotates about the shaft 10.

In view of these problems, the purpose of this invention is to
To provide a handle device for an outboard motor that prevents engine vibrations from being transmitted to the handle even in a low-speed operating range of the engine.

In order to achieve this objective, the present invention engages the steering bracket that fixedly supports the steering wheel and the engine cover with each other via a cushioning material at a position away from the central axis of the pilot shaft. .

The present invention will be described below with reference to embodiments shown in the drawings. The handle device according to the present invention has a fourth
As shown in the figure, a cushioning material 1 such as rubber is inserted between the rib 14 formed at the air intake port 13 of the lower cover 7a and the rib 15 formed at the steering bracket 8.
6 is interposed. In this steering wheel device, several cushioning materials 16 are implanted in the steering bracket 8 at appropriate intervals, and the inner surface 16a thereof is brought into contact with the outer surface 14a of the lower cover side rib 14. Further, the outer surface 14a of the rib 14 and the inner surface 16a of the buffer material 16 are both formed into tapered surfaces so as not to prevent the lower cover 7a from moving in the direction away from the steering bracket 8.

As a result of field tests conducted on an outboard motor equipped with a handle device configured as described above, it was found that in such an outboard motor, the vibration of the handle 12 is significantly reduced when the engine 6 is operated at a low speed. Further, as a result of this test, when the lower cover 7a and the steering bracket 8 were always connected, engine vibrations were transmitted to the steering wheel 12, the hull, etc. in the middle and high speed operating range of the engine 6, which was not very preferable. However, in the case of the handle device of the embodiment, in the middle and high speed operating range of the engine, the outboard motor main body 4 tilts clockwise in FIG. The rib 14 of 7a and the cushioning material 16 are separated. Therefore, vibrations to the steering wheel 12 in the middle and high speed operating range of the engine, that is, the phenomenon in which the engine vibrations described above are transmitted to the steering wheel 12, etc., are avoided.

In the above embodiment, the ribs 14 and 15 formed in the air intake port 13 of a conventional outboard motor are used as the concave portions and convex portions formed on the lower cover 7a and the steering bracket 8.
In the present invention, it is of course possible to form the concave portions and convex portions in other locations. In addition, in the embodiment, several cushioning materials 1
Although the air intake passage is secured by installing the cushioning members 6 at appropriate intervals, the purpose can be achieved even with one annular cushioning member having an air intake passage.

As described above, the handle device for an outboard motor according to the present invention can reliably prevent engine vibrations from being transmitted to the handle in a low-speed operating range of the engine, resulting in good handle operability.

[Brief explanation of the drawing]

Figure 1 is a side view of a typical outboard motor;
The figure is an enlarged vertical cross-sectional view of the main parts, FIG. 3 is an enlarged cross-sectional view taken along the line A-A in FIG. 2, and FIG. 4 is a vertical cross-sectional view showing the main parts of the handle device according to the present invention. It is. 4... Outboard motor body, 5... Drive shaft housing, 6... Engine, 7... Engine cover, 7a... Lower cover, 8... Steering bracket, 10... Pilot shaft, 11a
...Atsupa mount, 11b...Lower mount,
12...Handle, 13...Air intake port, 14...
...Rib (convex part), 15...Rib (concave part), 16...
Buffer material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A steering bracket for an outboard motor comprising a steering bracket held on a driveshaft housing via a top mount, and a handle fixed to the steering bracket, the steering bracket and the steering bracket; A handle device for an outboard motor, characterized in that an end portion of a lower cover of an engine fixedly installed on the drive shaft housing is brought into contact with each other via a cushioning material. (2) A practical use characterized in that a convex portion is formed on one of the steering bracket and the lower cover, a concave portion is formed on the other, and the cushioning material is interposed between the convex portion and the concave portion. A handle device for an outboard motor as set forth in claim (1) of patent registration. (3) The outboard motor handle set forth in claim (1) of the utility model registration claim, wherein an air intake port into the engine cover is used as the convex portion and concave portion of the steering bracket and the lower cover. Device.