JPS58152698A - Supporting construction for propelling unit of outboard engine - Google Patents

Abstract

PURPOSE:To sufficiently absorb the vibrations of an engine, by a method wherein a retainer fixed to a propelling unit and a retainer fixed to a swivel bracket are placed oppositely to each other with a vertical spacing therebetween, and a shock-absorbing member is intermediately placed between the retainers. CONSTITUTION:The propelling unit 18 is connected through an upper part supporting means 16 to a steering shaft 15 rotatably supported by the swivel bracket 14. The upper part supporting means 16 consists of an upper retainer 23 which is fixed to a flange part 22 formed at an upper part of the shaft 15 and a lower retainer 26 which is fixed to a supporting part formed at the inside surface of the propelling unit 18, which retainers 23, 26 are placed oppositely to each other with a vertical spacing therebetween, and the shock-absorbing member 28 is intermediately provided between the retainers. The shock-absorbing member 28 undergoes a shear deformation in response to relative displacements of the retainers 23, 26 in the propelling direction and a steering direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a propulsion unit support structure for an outboard motor that supports the propulsion unit on a swivel bracket on the hull side.

In an outboard motor, since the engine is disposed above the propulsion unit, the entire propulsion unit is vibrated by the engine. Therefore, in order to prevent the vibrations of this propulsion unit from being transmitted to the hull, the trap and propulsion unit are supported by a swivel bracket on the hull side via a cushioning material made of an elastic body.

The buffer material forming the conventional propulsion unit support structure described above has a structure that shear deforms in response to propulsive force and compressively deforms in response to steering force. However, although the deformability of the cushioning material is large under shear deformation, it is relatively small under compressive deformation. Therefore, the conventional propulsion unit support structure has the disadvantage that engine vibrations cannot be sufficiently absorbed by the cushioning material when the outboard motor is steered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a propulsion unit support structure for an outboard motor that can sufficiently absorb engine vibrations in all operating conditions, including straight-ahead sailing and steering.

In order to achieve the above object, the present invention provides a propulsion unit support structure for an outboard motor that supports a propulsion unit on a swivel bracket on the hull side. , a lower leg support fixed to the other side of the propulsion unit or the swivel bracket are arranged facing each other with an interval in the vertical direction,
A cushioning material is interposed between the image holder and held by both holders.

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

Fig. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, Fig. 2 is a side view showing a main part of the embodiment cut away, and Fig. 3 is an !1, FIG. 4 is a sectional view of the main part along line IV-IV in FIG. 3, and FIG.
It is a main part V# side view along V-VS of a figure.

A #i clamp bracket 12 is fixed to the stern plate 11 of the hull 10, and a swivel bracket 14 is supported on the clamp bracket 12 via a tilt shaft 13 so as to be rotatable around a substantially horizontal axis. A steering shaft 15 is supported on the swivel bracket 14 so as to be rotatable about a substantially vertical axis J1. Upper support means 16 are provided at both upper and lower ends of the steering shaft 15, respectively.
, a propulsion unit 18 is connected via lower support means 17. The engine unit 19 is mounted on the upper part of the propulsion unit 18, and the #i propeller 2 is mounted on the lower part of the engine unit 19.
0 is provided. Just in case, there is a '-F' on the top of the steering shaft 15.
An i-steering handle 21 extends toward the inside of the ship. That is, by moving the steering knob 211r left and right, the steering shaft 15, the upper support means 16, and the lower support means 1
The propulsion unit 18 is rotated via the shaft 7 and can be steered.

Here, between the lower support means 17Fi, the swivel bracket 14, and the propulsion unit 18, a cushioning material that undergoes shearing deformation in response to the propulsion force and compression deformation in response to the steering force is provided, similar to that in K and F. I am intervening. On the other hand, the upper support means 16 is formed as shown in FIGS. 2 to 4. That is, the clamp part 22 is integrally formed on the upper part of the steering shaft 15, and the propulsion unit 1 of the flange part 22
8, the upper holder 23 has a fixing bolt 24
Fixed by Further, a lower holder 26 is fixed to a support 1125 formed on the inner surface of the propulsion unit 13 with a fixing bolt 27.

The upper holder 23 and the subordinate holder 26 face each other with an interval in the vertical direction, and upper parts 1Ill of a pair of left and right rubber cushioning materials 28 are held on the left and right sides of the upper holder 23. The lower side of the buffer material 28 is held on the left and right sides of the holder 26. In other words, the buffer material 28 is sheared and deformed both when the upper holding member 23 and the lower holding member 26 move relative to each other in the propulsion direction and relative movement in the steering direction.

Note that the upper m portion of the connecting tool 29 is fastened to the upper holder 23 with a fixing bolt 24.

The lower end of the connecting tool 29 is bent toward the lower surface of the lower holder 26, and a rubber 30 that comes into contact with the lower surface of the lower holder 26 is held at the bent portion. That is, the coupling tool 29 can hold the upper holder 23 and the lower holder 26 in the vertical arrangement relationship, and the rubber 30 absorbs the vibrations of the propulsion unit 18, so that the vibrations of the propulsion unit 18 are connected. This prevents the force from being transmitted to the swivel bracket 14 via the tool 29.

Furthermore, a stopper 31 is erected at the center of the lower holder 26, and the upper end of the stopper 31 is spaced apart from the rear inner surface 23^ of the upper holder 23 in the direction of propulsion in the normal state. That is, when propelling in the forward direction, the propulsion unit 1
8 and the lower holder 26 swing clockwise in FIG. The range of deformation in the direction in which the forward propulsive force is applied can be limited. Further, the left and right cushioning materials 28 are integrated by a connecting portion 32 located within the lower arm holder 26.

Next, the operation of the above embodiment will be explained.

During straight running, the upper holder 23 and the lower holder 26 move relative to each other in the propulsion direction, causing shearing deformation at the intermediate portion of the buffer material 28Fi in the upper direction. (9) During steering, the upper holder 23 and the lower holder 26 move relative to each other in the steering direction, and the buffer material 28 is sheared at an intermediate portion in the vertical direction. Here, the shearing deformation of the cushioning material 28 has a larger deformability than its compressive deformation. Therefore, in all operating conditions during straight running and steering, the buffer material 28
has a large deformability and can sufficiently absorb engine vibrations. In particular, when steering under low-load, low-speed operating conditions such as when the engine is trolling, the cushioning material 28
can undergo large shear deformations, and the shock absorbing material 28 can satisfactorily absorb engine vibrations.

As described above, in the outboard motor propulsion unit support structure of the present invention 8A#-i, which supports the propulsion unit on the swivel bracket on the hull side, the holder 1 is fixed to the propulsion unit or the swivel bracket. A lower holder fixed to the other side of the propulsion unit or swivel bracket is arranged facing each other with an interval in the vertical direction, and a buffer material held by both holders is interposed between the two holders. This has the effect of being able to sufficiently absorb engine vibrations in all operating conditions, both when traveling straight and when turning.

[Brief explanation of the drawing]

FIG. 1 is a @ side view showing an outboard motor to which an embodiment of the present invention is applied, FIG. 2 is a side view showing a main part of the same embodiment with a cutaway, and FIG. FIG. 4 is a cross-sectional view of a main part along line F/--INK in FIG. 3, and FIG. 14... Swivel bracket, 16... Upper support means, 18... Propulsion unit, 23... 1 holder, 26... Lower holder, 28... Cushioning material. Agent Patent Attorney Osamu Shiokawa Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 3 Procedural Amendments April 1980 Dear Commissioner of the License Agency 1, Indication of Case 1988 Patent Application No. 033968 No. 2, Title of the invention: Outboard motor propulsion unit support structure 3, Relationship to the amended case Patent applicant name: Sanshin Kogyo Co., Ltd. 4, Agent: 105 Address: 23-7 Toranomon-chome, Minato-ku, Tokyo No. 23 Mori Building 8th Floor 6, Claims column and Detailed Description of the Invention column of the specification subject to amendment. 7. Contents of amendment (1) The scope of claims in the specification is revised as shown in the attached sheet. (2) Add "to the r-axis supported steering shaft" after "to the swivel bracket on the hull side" on page 42, line 1s of the specification. (3) "Swivel bracket" on page 42, line 20 of the specification fi is changed to "steering shaft." (4) "Swivel bracket" in the first and second lines of page 3 of the specification shall be changed to "steering shaft." (5) After "on the swivel bracket on the hull side" on page 7, line 8 to line 9 of the specification, "supported on the 24 rudder shaft"
Add. Change "swivel bracket" in line 7, line 11 of the specification to "steering axis". "Swivel Brakesaki Claims (1) In a propulsion unit support structure for an outboard motor in which the propulsion unit is supported on a steering shaft pivotally supported by a swivel bracket on the hull side, the propulsion unit or A holder fixed to one side of the steering shaft and a lower holder fixed to the other side of the propulsion unit or steering shaft are arranged facing each other with an interval in the vertical direction, and both holders are arranged between the two holders. A propulsion unit support structure for an outboard motor is characterized by interposing a cushioning material that is held in place.

Claims (1)

[Claims] (1) In an outboard motor propulsion unit support structure in which the propulsion unit is supported on a swivel bracket on the hull side, a ball holder is fixed to one side of the propulsion unit or swivel bracket, and a ball holder is fixed to the other side of the propulsion unit or swivel bracket. A propulsion unit support for an outboard motor, characterized in that lower holders are disposed facing each other with an interval in the vertical direction, and a cushioning material held by both holders is interposed between the two holders. structure.