JPH0638800Y2 - Outboard motor steering brake - Google Patents

Description

TECHNICAL FIELD The present invention relates to an outboard motor steering brake.

2. Description of the Related Art In an outboard motor, a steering operation is performed by swinging the outboard motor main body in the left-right direction around a pivot shaft that supports the outboard motor main body. In this case, if the steering operation is too light, it is likely to be affected by waves, and the operation tends to be unstable.
A brake device is provided to set the weight or steering force to an appropriate value. Further, during fishing work, the steering may be fixed in a fixed (straight ahead) direction to take in the net, and for that purpose, it is necessary to be able to arbitrarily adjust the load of the brake during the maneuvering.

4 to 6 show a structure of a conventional brake device. In FIG. 4, (1) is a clamp bracket fixed to the transom of the hull. The swivel bracket (3) is attached to the lateral tilt tube (2) attached to the clamp bracket (1) on the inside of the transom. ) Is attached so that it can rotate up and down. A vertical pivot shaft (4) is inserted into the swivel bracket (3) at a position behind the swivel bracket (3) and away from the swivel bracket (3).
Steering bracket (5) attached to the upper end of
The outboard motor body (7) is supported by the support bracket (6) which is also attached to the lower end. The outboard motor body (7) comprises a drive unit (9) having a propeller (8) at the lower end and an engine (10) mounted at the upper end of the drive unit (9). A steering handle (11) is attached to the front end of the steering bracket (5), and with this steering handle (11),
A steering operation is performed by swinging the outboard motor body (7) in the left-right direction about the pivot shaft (4).
As shown in FIGS. 5 and 6, a resin sleeve (12) is fitted onto the upper end portion of the pivot shaft (4) inserted into the insertion hole of the swivel bracket (3), and the sleeve (12) is fitted into the sleeve (12). The brake pad (13) is inserted into the corresponding recessed portion, and the brake pad (14) is screwed from the outside of the swivel bracket (3) with the tip of the brake pad (14) as shown in FIG. It is pressed against the sleeve (12) side to brake the pivot shaft (4).

Further, in the same thing as this, unevenness is formed on the outer periphery of the drive shaft housing which is the same swing center as the pivot shaft, and the uneven surface is pressed against the brake pad. (Publication No. 61-27799).

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, in the related art, the brake for the steering is performed by braking the pivot shaft (4) which is the swing center of the outboard motor body (7). As shown in FIG. 4, since the pivot shaft (4) is outside the ship and below the cowling that covers the engine (10), the brake bolt (14) mounted around the pivot shaft (4) can be operated. It was difficult to carry out the operation from the inside of the ship easily, and there was the inconvenience that the steering force could not be fixed by adjusting the operating force during maneuvering. The braking force on the steering is a product F × R of the pressing force F of the brake bolt (14) to the pivot shaft (4) and the radius R from the center of the pivot shaft (4) which is the steering center to the pressing surface. However, since the radius R is very small, there is a disadvantage that the brake is hard to work. Especially this brake is
It has the role of preventing the steering wheel from being taken off when the vehicle suddenly starts, suddenly stops, or suddenly accelerates due to the oscillating force based on the inertia force of (0), but if the brake is weak, such preventive effect becomes insufficient. . On the other hand, in order to improve the braking effectiveness, the pressing force must be made extremely large, which causes the brake pad (13) and the sleeve (12) to be worn and damaged quickly, especially for fixing the steering. Sometimes the bolts (14) are overtightened and damaged and must be replaced early. On the other hand, in the invention described in the above-mentioned publication in which the contact surface of the brake pad is provided with the unevenness, the movement of the brake is relatively good, but the unevenness causes the wear of the brake pad to be quick. . Moreover, the sleeve (12) and the brake pad (1
Since 3) is inside the insertion hole of the swivel bracket (3), in order to replace it, it is necessary to remove the steering bracket (5) and pull out the pivot shaft (4), and only remove the steering bracket (5). However, the drive unit (7) must be removed and the whole must be lifted, so replacement work becomes very large. Furthermore, since the brake bolt (14) is located outside the ship where it is easily exposed to seawater, there is a risk that salt will become stuck and adjustment will not be possible.

Means for Solving the Problems In order to solve the above problems, in the present invention, a clamp bracket attached to a hull is supported by tilting the tilt bracket in the up-down direction via a tilt tube in the left-right direction of the hull, Moreover, the outboard motor main body is swingably supported in the left and right directions by a vertical pivot shaft attached to the tilt bracket behind the tilt tube, and the outboard motor main body is swung to steer the vehicle. In an outboard motor to be operated, a brake rod that is swingably inserted into the tilt tube is linked to the above swing motion of the outboard motor body, and a brake device that acts on sliding of the brake rod is provided. It is characterized by being attached around the brake rod.

Operation According to the above configuration, the brake device is located around the rod inserted into the tilt tube inside the ship, and can be easily operated from the inside of the ship. Also, because it is far from the pivot shaft,
The pressing force can be reduced, and the pads can be replaced by simply removing the interlocking mechanism between the brake rod and the outboard motor body and pulling out the rod.

Embodiment In FIGS. 1 to 3 showing an embodiment of the present invention, a pair of left and right mounting portions of a clamp bracket (1) are attached to both ends of a tilt tube (2) in a horizontal direction inserted into a swivel bracket (3). (21) (21) is fitted on the outside. A nut (22) is screwed onto the end of the tilt tube (2) protruding from one side of the mounting part (21), and is formed on the other end of the tilt tube (2) protruding from the other support part (21). Male screw (23) with a pair of fixing nuts (25) (25)
Are screwed together, and the tilt tube (2) is fixed to the clamp bracket (1) side by the nut (25) on one side and the nut (22) on the other side. The swivel bracket (3) is rotatable with respect to the tilt tube (2),
This allows tilt rotation in the vertical direction. Further, one end of a nut-shaped brake case (26) is screwed and attached to the male screw (23) end of the tilt tube (2) at the right end of the figure. One of the two nuts (25) (25) is for fixing the brake case (26). A brake rod (27) is inserted into the tilt tube (2) from the outside of the brake case (26) so as to be swingable in the left-right direction. A brake pad (29) is provided inside a groove (28) formed on the inner circumference of the brake case (26), and a brake bolt (3) is screwed into the brake case (26) from the inside of the ship.
The tip of (0) comes into contact with the outer peripheral surface of the brake pad (29), and the brake bolt (30) is screwed in,
The brake pad (29) is pressed against the outer peripheral surface of the brake rod (27) so that the sliding movement of the brake rod (27) is braked. Further, a rod-shaped handle (31) for rotating the brake bolt (30) is attached to the tip of the brake bolt (30).

As shown in FIG. 3, an L-shaped connecting plate (33) is provided at the tip end portion of the steering bracket (5) projecting slightly inward of the tilt tube (2) above the tilt tube (2). ) Is fixed by bolts (32) at its vertical portion. The connecting portion (36) at one end of the connecting link (35) is pivotally attached to the horizontal portion of the connecting plate (33) by a bolt (34). The other end of the connecting portion (36) extends to one side substantially parallel to the brake rod (27) and then bent substantially vertically as shown in FIG.
Brake rod (2 that protrudes from the brake case (26)
It is pivotally attached to the tip of 7). Steering handle (1
As shown in FIG. 2, 1) is attached to one side surface of the steering bracket (5) so as to be vertically rotatable, and FIG. 2 shows a state in which the handle (11) is flipped up. When the steering handle (11) is used to perform the steering operation with the steering wheel tilted forward to the horizontal position as in FIG. 4, the steering bracket (5) rotates in the same direction. ,
As in the conventional case, the outboard motor body (7) of FIG. 4 swings left and right around the pivot shaft (4) to switch the traveling direction of the hull. At this time, as the steering bracket (5) rotates, the brake rod (27) slides in the left-right direction via the connecting link (35), so that the screwing amount of the brake bolt (30) is adjusted. Then, the operating force is adjusted by changing the pressing force of the brake pad (29) against the brake rod (27).

As described above, according to the present invention, the brake rod is inserted into the tilt tube that supports the swivel bracket, and the brake rod is slid according to the steering operation. The attached brake device changes the load applied to the steering wheel, that is, the operating force. By disposing the brake device inside the boat, the operating force can be easily adjusted even during maneuvering. Also,
If the brake pad is damaged or worn, you can easily replace it by removing the interlocking mechanism with the hull side and pulling out the brake rod. No need for complicated work, and replacement work is extremely easy. Moreover, unlike the one in which the pivot shaft is directly braked, the tilt tube itself is located far away from the center of the pivot shaft, so that the radius R becomes large and the pressing force F can be made smaller. Therefore, the durability of the brake pad itself is improved, and it is not necessary to press it strongly even when fixing it, and it is not necessary to provide unevenness for increasing frictional force, so damage to the brake pad itself is reduced. There is an effect. Further, since the braking effectiveness is improved, the steering wheel can be effectively prevented from being picked up by the exciting force of the engine.
In addition, since the brake device is located inside the ship in this way, it is less likely to be exposed to seawater, and inconveniences such as malfunction due to salt sticking can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of the embodiment of the present invention, which is vertically sectioned at a tilt tube portion and seen from a plane direction. FIG. 2 is a front view of the tilt tube portion seen from the inside of the ship, and FIG. Fig. 2 is a vertical sectional side view of a main part as viewed from the right side of Fig. 2, Fig. 4 is a side view showing the entire outboard motor, and Fig. 5 is a vertical sectional view of the upper end portion of a pivot shaft showing a conventional braking device. The figure is also a sectional view taken along the line AA of FIG. (1) …… Clamp bracket, (2) …… Tilt tube, (3) …… Swivel bracket, (4) Tilt bracket, (7) Outboard motor body, (26) …… Brake case, (27)… … Brake rod, (30) brake bolt.

Claims (1)

[Scope of utility model registration request] 1. A clamp bracket attached to a rear portion of a hull supports a tilt bracket in a vertical direction via a tilt tube extending in the left-right direction of the hull, and the tilt bracket is provided behind the tilt tube. In the outboard motor that supports the outboard motor body swingably in the left and right directions by the vertical pivot shaft attached to the outboard motor and performs steering operation by sliding the outboard motor body to the tilt tube. It is characterized in that a movably inserted brake rod is interlocked with the swing motion of the outboard motor body, and a brake device acting on sliding of the brake rod is attached around the brake rod. Steering brake for outboard motors.