JPH11245893A - Outboard motor with slide adjustment mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outboard motor fitted with a slide adjustment mechanism, capable of preventing the oscillation of an outboard motor main body at low-speed operation and allowing an easy handle operation at medium-to-high- speed operation. SOLUTION: An outboard motor main body 28 having a handle arm is supported by swivel brackets 10, 11 at the drive shaft housing 4 of the outboard motor main body 28 via slide shock absorbers 10, 11 in such a way as to be rotatable when a handle is operated by means of the handle arm. The swivel bracket 7 is provided with a slide adjustment mechanism 21 adjusting the force required to slide and rotate the drive shaft housing 4. The slide adjustment mechanism 21 has a slide shock absorber 11 provided at the swivel bracket 7 in such a way as to press against the outer peripheral surface of the drive shaft housing 4 from approximately the opposite side to the side exerted with thrust during forward travel, the slide shock absorber 11 serving also as a slide-adjustment shock absorber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor with a sliding adjustment mechanism which can adjust the sliding rotation of a drive shaft housing that rotates together with a handle by a handle arm.

[0002]

2. Description of the Related Art FIGS. 3 to 5 show the structure of a conventional outboard motor having a sliding adjustment mechanism of this type. FIG. 4 is a longitudinal sectional view of a portion centered on the swivel bracket of the outboard motor shown in FIG. 3, and FIG. 5 is an end view taken along line BB of FIG.

[0003] The outboard motor 1 with a sliding adjustment mechanism has an engine cover 2 containing an engine. The engine cover 2 includes a lower cover 2a and an upper cover 2b. A drive shaft 3 rotatably driven by the engine is led downward from a lower portion of the lower cover portion 2a. The drive shaft 3 is a cylindrical drive shaft housing 4 integrally attached to the lower cover portion 2a of the engine cover 2. Is housed along the axial direction. A gear case 5 is attached to a lower end of the drive shaft housing 4. The gear case 5 has a built-in gear mechanism (not shown) to which a rotational force is applied from the drive shaft 3. A propeller 6 is attached to the output shaft of the gear mechanism and is driven to rotate.

A tubular swivel bracket 7 is mounted on the outer periphery of the upper portion of the drive shaft housing 4 so as to be relatively rotatable. The swivel bracket 7 is provided with cushioning support recesses 8 and 9 which are opened at the inner periphery of the upper and lower portions. These cushioning material support recesses 8 and 9 have annular cushioning materials 10 and 1 made of rubber.
1 is supported, whereby the drive shaft housing 4 is slid and rotated while being in contact with the buffer members 10 and 11 for sliding.

A base end of a stern bracket 12 having a mounting recess 12 a is rotatably supported by a support shaft 13 at the tip of an overhang portion 7 a of the swivel bracket 7. At the base end of the stern bracket 12, fastening means 1 for fixing the stern bracket 12 to the hull with the mounting recess 12a fitted in the outboard motor mounting portion of the hull.
4 are provided. A large number of holes 15 are formed in the fan-shaped portion of the stern bracket 12, and the outboard motor angle setting support shaft 16 passed through the holes 15 is supported by a shaft support portion 17 protruding from the stern bracket 12. Outer unit 1
Are supported at an arbitrary angle.

The handle device 18 of the outboard motor 1 is attached to the lower cover 2a of the engine cover 2.
The handle device 18 includes a handle arm 19 fixed to the lower cover portion 2a, a handle grip 20 rotatably fitted to the tip of the handle arm 19, and a rotatable inside the handle arm 19 along its longitudinal direction. And a throttle shaft (not shown) for transmitting the rotation of the handle grip 20 to the throttle on the engine side.

[0007] On the side of the cylindrical swivel bracket 7,
The force required for slidingly rotating the drive shaft housing is adjusted so that the drive shaft housing 4 that rotates together with the rotation of the handle arm 19 can maintain the rotation angle set by the rotation of the handle arm 19. A sliding adjustment mechanism 21 is provided. The sliding adjustment mechanism 21 includes a screw shaft 23 that penetrates the screw hole 22 of the swivel bracket 7 by screw connection, and a knob that adjusts the length of the tip of the screw shaft 23 that projects into the swivel bracket 7 by turning the screw shaft 23. 24, a support plate 25 rotatably supported at the tip of a screw shaft 23 in the swivel bracket 7, and fixed to the inward surface of the support plate 25 and pressed against the outer peripheral surface of the drive shaft housing 4. It is composed of a sliding adjustment buffer member 26 to be applied, and a coil spring 27 fitted on the outer periphery of the screw shaft 23 between the swivel bracket 7 and the knob 24.

In this specification, a stern bracket 12 fixed to a hull by tightening a tightening means 14, a swivel bracket 7 rotatably supporting the drive shaft housing 4 side, and a slide supported by the swivel bracket 7 A portion other than the movement cushioning members 10 and 11 and which rotates together with the handle arm 19 when it is rotated is referred to as an outboard motor main body 28.

In such an outboard motor with a sliding adjustment mechanism,
The maintenance of the rotation angle of the drive shaft housing 4 due to the rotation operation of the handle arm 19, in other words, the maintenance of the rotation angle of the outboard motor main body 28, is performed by adjusting the sliding adjustment mechanism 21. That is, if the knob 24 is turned, for example, clockwise, the tip of the screw shaft 23 becomes
The length that protrudes into the inside becomes longer, and
Is increased against the outer peripheral surface of the drive shaft housing 4, and the drive shaft housing 4 and the handle arm 19 are hard to rotate. Conversely, pick 24
By turning the screw counterclockwise, for example, the length of the tip of the screw shaft 23 protruding into the swivel bracket 7 is reduced, and the force with which the sliding adjustment buffer 26 is pressed against the outer peripheral surface of the drive shaft housing 4 is weakened. As a result, the drive shaft housing 4 and the handle arm 19 are easily turned.

[0010]

However, in the conventional outboard motor with a slide adjusting mechanism having the above-described structure, if the slide adjusting cushioning member 26 is too tightly tightened on the outer peripheral surface of the drive shaft housing 4, the handle will not work. When the steering operation is performed by moving the arm 19, there is a problem that the operation feeling of the handle arm 19 becomes heavy and the steering operation is difficult. On the other hand, if the sliding adjustment buffer 26 is loosely fastened to the outer peripheral surface of the drive shaft housing 4, the outboard motor main body 28 swings greatly during low-speed operation, which makes it difficult to operate. . Further, since the sliding adjustment buffer 26 is directly tightened to the outer peripheral surface of the drive shaft housing 4, the vibration of the outboard motor main body 28 is easily transmitted to the hull via the sliding adjusting mechanism 21, and the vibration of the hull is large. There is a problem that tends to occur.

An object of the present invention is to provide an outboard motor with a sliding adjustment mechanism that can prevent the outboard motor from swinging at low speed operation and can easily operate the steering wheel during medium to high speed operation.

Another object of the present invention is to provide an outboard motor with a sliding adjustment mechanism that can simplify the structure of the sliding adjustment mechanism.

Another object of the present invention is to provide an outboard motor with a sliding adjustment mechanism that can more effectively increase the force required for slidingly rotating the drive shaft housing.

Another object of the present invention is to provide an outboard motor with a sliding adjustment mechanism which can prevent the vibration of the outboard motor main body from being transmitted to the hull via the sliding adjusting mechanism.

[0015]

SUMMARY OF THE INVENTION The present invention provides an outboard motor body having a handle arm, and a drive shaft housing of the outboard motor body so that the outboard motor body can be rotated when the handle arm is operated by a handle. , A swivel bracket which is supported by a sliding cushion at a location, a stern bracket which is supported by the swivel bracket and attaches the outboard motor body to the hull, and a drive shaft housing which is provided on the swivel bracket and slides and rotates the drive shaft housing. An outboard motor with a sliding adjustment mechanism including a sliding adjusting mechanism for adjusting a force required for the outboard motor.

In the outboard motor with a sliding adjustment mechanism according to the present invention, the sliding adjustment mechanism applies a sliding adjustment buffer material to the outer peripheral surface of the drive shaft housing from a side substantially opposite to a side receiving a thrust during forward running. The swivel bracket is provided so as to be pressed against the swivel bracket.

As described above, when the sliding adjustment cushioning material is pressed against the outer peripheral surface of the drive shaft housing from a side substantially opposite to the side receiving the thrust during forward running, when the thrust during forward running is received. In this case, the drive shaft housing moves in a direction away from the slide adjusting buffer by the thrust during forward running, and the compressive force applied to the slide adjusting buffer is reduced. For this reason, even if the sliding adjustment cushioning material is initially compressed so that the force required to slide and rotate the drive shaft housing is increased to some extent, as the thrust during forward running becomes stronger, the sliding adjusting cushioning material becomes stronger. The force of compressing the material can be automatically reduced. Therefore, the force required to slide and rotate the drive shaft housing is initially increased to some extent, which can prevent the outboard motor main body from swinging at low speed operation, and then the sliding force increases as the thrust during forward running increases. There is an advantage that the force for compressing the adjustment cushioning material is automatically weakened, so that the steering wheel can be easily operated during middle-high speed driving.

In this case, the sliding adjustment mechanism uses a sliding cushioning material as a sliding adjusting cushioning material, and uses a screw shaft that penetrates the swivel bracket through a screw connection from a side substantially opposite to the side receiving the thrust during traveling. It is preferable that a part of the sliding cushioning material is configured to be pressed against the outer peripheral surface of the drive shaft housing. When the sliding cushioning material is also used as the sliding adjusting cushioning material as described above, the structure of the sliding adjusting mechanism can be simplified, the cost can be reduced, and the ship can be used especially during medium-high speed operation. It is possible to prevent the vibration of the outer machine main body from being transmitted to the hull via the sliding adjustment mechanism.

Preferably, a concave portion is provided on the outer peripheral surface of the drive shaft housing against which the sliding cushioning material is pressed. This makes it difficult for the drive shaft housing to rotate with respect to the contact surface of the sliding cushion at the position where the sliding cushion is pressed by the screw shaft, and facilitates the force required to slide and rotate the drive shaft housing. Can be strengthened.

[0020]

1 and 2 show an embodiment of an outboard motor with a sliding adjustment mechanism according to the present invention. FIG. 1 shows an outboard motor with this sliding adjustment mechanism. FIG. 2 is an enlarged end view taken along the line AA in FIG. 1. 3 to 5 described above.
The parts corresponding to are denoted by the same reference numerals.

In this outboard motor with a sliding adjustment mechanism,
The lower sliding buffer 11 is the sliding adjusting buffer 2 described above.
6 is also used. The sliding adjustment mechanism 21 is provided on the sliding cushion 1 from a side substantially opposite to a side receiving a thrust during forward running.
1 is provided on the swivel bracket 7 so as to press the outer peripheral surface of the drive shaft housing 4. That is, in the sliding adjustment mechanism 21, the screw hole 22 is provided in a portion of the swivel bracket 7 substantially opposite to the side receiving the thrust during forward running. The sliding cushioning member 11 is provided with a recess 30 into which the cushioning member pressing member 29 fits, and the buffering member pressing member 29 is integrally fixed to the recess 30. The tip of the screw shaft 23 in the swivel bracket 7 is rotatably abutted on the surface of the cushioning member pressing member 29. A knob 24 for turning the screw shaft 23 is provided at the tip of the screw shaft 23 outside the swivel bracket 7, and a coil spring 27 is fitted on the outer periphery of the screw shaft 23 between the swivel bracket 7 and the knob 24. Have been.
A recess 31 is provided on the outer peripheral surface of the drive shaft housing 4 against which the sliding cushioning member 11 is pressed by cutting the outer peripheral surface of the drive shaft housing 4 flat in the tangential direction.

In such an outboard motor with a sliding adjustment mechanism,
The portion 11a of the sliding cushioning member 11 between the cushioning member pressing member 29 and the drive shaft housing 4 is compressed by tightening the screw shaft 23, and the friction of the contact surface between the sliding cushioning member 11 and the drive shaft housing 4 is reduced. Strengthened,
The force required to slide and rotate the drive shaft housing 4 is strongly required.

In this state, when the outboard motor main body 28 is started and the hull is propelled and moved in the forward direction, the outboard motor with the sliding adjustment mechanism is substantially opposite to the side receiving the thrust during forward running. Since a part of the sliding cushioning member 11 also serving as the sliding adjusting cushioning member 26 is pressed against the outer peripheral surface of the drive shaft housing 4 from the side, when receiving the thrust during forward running, the drive shaft The housing 4 moves in a direction (rightward in FIG. 2) away from the sliding cushion 11 due to the thrust during forward running, and a portion 11 a of the sliding cushion 11 between the cushion pressing member 29 and the drive shaft housing 4. The compressive force that was applied to the body becomes weaker. For this reason, even if the sliding cushioning material 11 is initially compressed so that the force required for slidingly rotating the drive shaft housing 4 is increased to some extent, as the thrust during forward running becomes stronger, the sliding cushioning material 11 becomes smaller. The force for compressing the portion 11a can be automatically reduced. Therefore, the force required to slide and rotate the drive shaft housing 4 is initially increased to some extent, so that the outboard motor main body 28 can be prevented from swinging during low-speed operation, and then the thrust during forward running increases. The force for compressing the portion 11a of the sliding cushioning member 11 is automatically reduced, so that the steering wheel can be easily operated during medium-high speed driving. Further, when the sliding cushioning material 11 is also used as the sliding adjusting cushioning material 26, it is possible to prevent the vibration of the outboard motor main body 28 from being transmitted to the hull via the sliding adjusting mechanism 21 particularly during the middle and high speed operation. Can be.

At this time, if a concave portion 31 is provided on the outer peripheral surface of the drive shaft housing 4 against which the sliding cushioning member 11 is pressed as shown in FIG. At this point, the drive shaft housing 4 is less likely to rotate with respect to the contact surface of the sliding cushioning member 11, and the force required for slidingly rotating the drive shaft housing 4 can be easily increased.

In the above example, the lower sliding cushioning member 11 is also used as the sliding adjusting cushioning member 26 so that the swivel bracket 7 slides on the side substantially opposite to the side receiving the thrust during forward running. Although the dynamic adjustment mechanism 21 is provided, the present invention is not limited to this, and the thrust at the time of forward running is reduced by using the upper sliding buffer 10 as the sliding adjusting buffer 26 as well. The swivel bracket 7 may be provided with a sliding adjustment mechanism 21 on a side substantially opposite to the receiving side.

Also, the present invention provides a sliding cushioning material 10, 11.
Is not limited to an example in which the sliding adjustment buffer 26 is also used as the sliding adjustment buffer 26, as shown in FIG.
The present invention is also applied to the sliding adjustment mechanism 21 having a structure in which the sliding contact mechanism 6 is directly in contact with the drive shaft housing 4 by providing the sliding adjusting mechanism 21 on the swivel bracket 7 on a side substantially opposite to the side receiving the thrust during forward running. can do.

[0027]

In the outboard motor with the slide adjusting mechanism according to the present invention, the slide adjusting mechanism includes a slide adjusting cushioning member from a side substantially opposite to a side receiving a thrust during forward running. Is provided on the swivel bracket so as to press against the outer peripheral surface of the drive shaft. When the thrust during forward running is received, the drive shaft housing separates from the sliding adjustment cushion due to the thrust during forward running. Moves to
The compression force applied to the sliding adjustment cushioning material can be reduced. For this reason, even if the sliding adjustment cushioning material is initially compressed so that the force required to slide and rotate the drive shaft housing is increased to some extent, as the thrust during forward running becomes stronger, the sliding adjusting cushioning material becomes stronger. The force of compressing the material can be automatically reduced. Therefore, the force required to slide and rotate the drive shaft housing is initially increased to some extent, which can prevent the outboard motor main body from swinging at low speed operation, and then the sliding force increases as the thrust during forward running increases. There is an advantage that the force for compressing the adjustment cushioning material is automatically weakened, so that the steering wheel can be easily operated during middle-high speed driving.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a portion centered on a swivel bracket of an outboard motor with a sliding adjustment mechanism according to the present invention.

FIG. 2 is an enlarged end view taken along line AA of FIG. 1;

FIG. 3 is a side view of a conventional outboard motor with a sliding adjustment mechanism.

FIG. 4 is a longitudinal sectional view of a portion centered on a swivel bracket of the conventional outboard motor with a sliding adjustment mechanism shown in FIG. 3;

FIG. 5 is an enlarged end view taken along the line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outboard motor with a sliding adjustment mechanism 2 Engine cover 2a Lower cover part 2b Upper cover part 3 Drive shaft 4 Drive shaft housing 5 Gear case 6 Propeller 7 Swivel bracket 7a Overhang part 8,9 Buffer material support concave part 10,11 Buffer for sliding Material 12 Stern bracket 12a Mounting recess 13 Support shaft 14 Tightening means 15 Hole 16 Outboard motor angle setting support shaft 17 Shaft support 18 Handle device 19 Handle arm 20 Handle grip 21 Sliding adjustment mechanism 22 Screw hole 23 Screw shaft 24 Knob 25 Support plate 26 sliding adjustment buffer 27 coil spring 28 outboard motor main body 29 cushioning member pressing member 30, 31 recess

Claims (3)

[Claims] 1. An outboard motor body having a handle arm,
A swivel bracket for supporting the outboard motor body via a sliding cushion at a portion of the drive shaft housing of the outboard motor body so that the outboard motor body can be rotated when the handle arm is operated by the handle arm; and a swivel bracket supported by the swivel bracket. A stern bracket for attaching the outboard motor body to the hull, and a slide adjustment mechanism provided on the swivel bracket for adjusting a force required to slide and rotate the drive shaft housing. In the outboard motor with the above, the sliding adjustment mechanism presses the sliding adjustment cushioning material against the outer peripheral surface of the drive shaft housing from a side substantially opposite to a side receiving a thrust during forward running to the swivel bracket. An outboard motor with a sliding adjustment mechanism, which is provided. 2. The sliding adjustment mechanism, wherein the sliding cushioning material is also used as the sliding adjusting cushioning material, and the swivel bracket penetrates from a side substantially opposite to a side receiving a thrust during traveling by screw connection. 2. The outboard motor with a slide adjusting mechanism according to claim 1, wherein a part of the buffer member for sliding is pressed against an outer peripheral surface of the drive shaft housing by a screw shaft. 3. The outboard motor with a sliding adjustment mechanism according to claim 2, wherein a concave portion is provided on an outer peripheral surface of the drive shaft housing against which the sliding cushioning material is pressed.