JP3304725B2 - Power tilt device for outboard motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a power tilt device for an outboard motor.

[0002]

2. Description of the Related Art As shown in FIGS. 8 and 9, a conventional outboard motor includes a pair of right and left clamp brackets b, b fixed to a stern plate a (see FIG. 9). b, a swivel bracket d that is tiltably supported by the b and supports the outboard motor body c to be steerable; a cylinder device e interposed between the swivel bracket d and the clamp brackets b; A PTT mainly comprising a pressure fluid supply device f having a motor connected to the cylinder device e and supplying a pressure fluid to the cylinder device e;
(Power Tilt Trim: hereinafter referred to as power tilt).

The cylinder device e is disposed on the center line C of the swivel bracket d in a front view as shown in FIG. 8, and its lower end is supported by the clamp brackets b, b via a lower support rod g. The upper end of the piston rod h is supported by the swivel bracket d via the upper support rod i. Further, the cylinder device e has main body portions j, j on the left and right sides on the lower portion thereof, and the main body portions j, j
As shown in FIG. 9, are provided in a state in which they are respectively inclined backward with respect to the piston rod h in a side view. The pressure fluid supply device f is disposed on the port side with respect to the center line C of the swivel bracket d in the front view and in the vicinity of above the main body j.
According to this power tilt device, the motor of the pressure fluid supply unit f is rotationally driven in an appropriate direction, and the piston rod h
The outboard motor main body c is tilted up and down by tilting the swivel bracket d by expanding and contracting, and the cylinder device e absorbs the impact force caused by the collision between the outboard motor main body c and an obstacle such as driftwood. Or can be.

[0004] Japanese Patent Application Laid-Open No. Hei 5-23842 discloses that
By arranging the cylinder device on one side on the left and right of the center line of the swivel bracket and arranging the pressure fluid supply device on the other side, it is possible to compactly arrange the cylinder device etc. between the left and right clamp brackets and the swivel bracket. An aimed power tilt device is disclosed.

[0005]

However, in the conventional power tilt device shown in FIGS. 8 and 9, the cylinder device e is connected to the center line C of the swivel bracket d.
The pressure fluid supply device f
However, it is difficult to fit the main body j of the cylinder device e compactly.

On the other hand, in the power tilt device described in Japanese Patent Application Laid-Open No. 5-23842, the cylinder device and the pressure fluid supply device are determined based on the shape of the swivel bracket and the position of the pressure fluid supply device. Since the left and right positional relationship cannot be replaced, the arrangement of the pressure fluid supply device is restricted to one side on the left and right sides. Therefore, it is not possible to selectively arrange the pressure fluid supply device on one of the left and right sides or on the other side in accordance with the convenience of the wiring of the lead wire connected to the motor, which causes a wiring problem. For example, when connecting the lead wire to the inside of the engine in order to route the lead wire together with the wiring of the throttle system, the lead is arranged on the left and right sides of the engine unit on the opposite side to the pressure fluid supply device on the layout inside the engine. In some cases, the wires are wired, and in such a case, there are disadvantages that the layout of the leads becomes complicated and the length of the leads becomes long.

When two outboard motors are mounted side by side on a hull, for example, the pressure fluid supply devices in each outboard motor are arranged on the same left and right sides, so that adjacent outboard motors If the lead wires are to be wired together, there is a problem that the lead wire becomes longer on one outboard motor side.

The present invention has been made in view of the above-mentioned conventional problems, and has a compact arrangement of a cylinder device and the like, and can easily perform wiring of a lead wire relating to a pressure fluid supply device. An object of the present invention is to provide a power tilt device for an external unit.

[0009]

The present invention has the following configuration to achieve the above object. That is, the present invention provides a pair of left and right clamp brackets fixed to a hull, a swivel bracket supported by the pair of right and left clamp brackets to be tiltable and supporting the outboard motor body to be steerable, and the swivel bracket. Power tilt device for an outboard motor, comprising: a cylinder device interposed between the cylinder device and the clamp bracket; and a pressure fluid supply device having a motor connected to the cylinder device and supplying a pressure fluid to the cylinder device. Wherein the cylinder device has a lower end supported by the clamp bracket via a lower support rod, while an upper end of the piston rod is supported by the swivel bracket via an upper support rod, The cylinder device is arranged on one side on the left and right with respect to the center line of the swivel bracket in front view, and In the arrangement in which the force fluid supply device is arranged, the swivel bracket has a shape capable of replacing the left-right positional relationship between the cylinder device and the pressure fluid supply device, and a center boss is provided at a central portion of the swivel bracket, The upper end of the pressure fluid supply device is located at a position lower than the center boss, and a pair of left and right side bosses is provided symmetrically on both left and right sides of the center boss. A power tilt device for an outboard motor, wherein an upper end portion of the piston rod is supported between a side boss and the center boss via the upper support rod.

According to the present invention, the pressure fluid supply device is selectively arranged on one of the left and right sides of the swivel bracket, the cylinder device is arranged on the other side, and the side boss on the cylinder device arrangement side and the center boss are connected to each other. In between, the upper end of the piston rod of the cylinder device can be supported via the upper support rod. Therefore, for example, the pressure fluid supply device can be arranged on either the left or right side according to the convenience of the wiring of the lead wire connected to the motor of the pressure fluid supply device, so that the lead wire can be easily wired. And lead wires can be shortened.

In addition, since the cylinder device and the pressure fluid supply device can be disposed on both left and right sides of the center line of the swivel bracket when viewed from the front, both devices can be compactly disposed between the swivel bracket and the clamp bracket. can do.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the terms left and right simply refer to the port side and starboard side of the hull. FIG. 1 is a front view of an outboard motor according to the present embodiment, FIG. 2 is a side view of the outboard motor according to the present embodiment, FIG. 3 is a front view of a power tilt device of the present embodiment, and FIG. 5 is a front view of the swivel bracket according to the present embodiment, FIG. 6 is a side view of the swivel bracket according to the present embodiment, and FIG. 7 is a front view of the power tilt device of the present embodiment. The pressure fluid supply device is disposed on the starboard side.

As shown in FIGS. 1 and 2, a power tilt device 2 for an outboard motor according to this embodiment includes a pair of right and left clamp brackets 6L, 6L fixed to the stern plate of the hull 4.
R and a swivel bracket 8 that is tiltably supported by a pair of left and right clamp brackets 6L and 6R. As shown in FIG. 2, a turning cylinder 10 is provided on the rear surface of the swivel bracket 8, and the outboard motor body 12 is turned on the turning cylinder 10 via a turning shaft (not shown). It is supported so as to be freely steered. An engine unit 14 having an engine therein is mounted on an upper portion of the outboard motor body 12. The engine unit 14 includes a lower cover 16 and a lower cover 1.
6 and an engine cover 18 mounted on the upper end of the engine cover 6.
Below the engine unit 14, there is provided a drive shaft housing 20 that extends in the vertical direction and houses a drive shaft driven by the engine unit 14. A gear case 22 containing a gear transmission driven by the drive shaft is fastened to the lower side of the drive shaft housing 20. Behind the gear case 22, a propeller powered by the gear transmission is provided. 24 is provided rotatably.

FIGS. 3 and 4 show the power tilt device 2.
As shown in FIG. 7, the cylinder device 26 interposed between the swivel bracket 8 and the clamp brackets 6L and 6R.
And a pressure fluid supply device 28 connected to the cylinder device 26 and supplying a pressure fluid to the cylinder device 26. Then, the cylinder device 26 is disposed on one side with respect to the center line C of the swivel bracket 8 in a front view, and the pressure fluid supply device 28 is disposed on the other side.

The cylinder device 26 is, as shown in FIG.
It is mainly composed of a cylinder main body 26a having a substantially cylindrical shape, and a piston rod 26b which can be vertically extended and contracted at the upper end of the cylinder main body 26a. Cylinder body 26a
Has a substantially cylindrical shape. Piston rod 26b
Has an upper connecting portion 26b1 connected to the swivel bracket 8 at an upper end thereof, and a through hole 26b2 penetrating left and right is formed in the upper connecting portion 26b1. Further, a lower connecting portion 26a1 connected to the clamp brackets 6L and 6R is provided at a lower end portion of the cylinder body 26a, and a through hole 26a2 penetrating left and right is provided in the lower connecting portion 26a1.

As shown in FIG. 3, the pressure fluid supply device 28 is adjacent to and substantially parallel to the cylinder device 26, and has a lower end at the lower end thereof.
6a. The pressure fluid supply device 28 is mainly composed of a motor, and has an outer diameter slightly larger than that of the cylinder body 26a. The upper end of the pressure fluid supply device 28 faces the peripheral wall of the cylinder body 26a and is located sufficiently below a center boss 54 described later.

As shown in FIG. 3, the clamp brackets 6L, 6R are spaced apart in the left-right direction. As shown in FIG. 2, the upper ends of the clamp brackets 6L, 6R are supported by the stern plate of the hull 4, respectively. It has a substantially inverted L-shape when viewed from the side and bends downward, and extends downward along the rear surface of the stern plate.
At the upper end of each of the clamp brackets 6L and 6R,
Take-out holes 30, 30 (only the port side is shown in FIG. 2) for a lead wire 62 to be described later are provided to penetrate in the left-right direction. As shown in FIG. 3, tilt pins 32L and 32R projecting inward are screwed to the lower portions of the clamp brackets 6L and 6R, respectively. Further, a boss 34 is provided at the lower end of each of the clamp brackets 6L and 6R, which protrudes inward and has shaft holes 34L1 and 34R1 therein.
L, 34R are provided.

As shown in FIG. 3, the swivel bracket 8 is disposed between the clamp brackets 6L and 6R when viewed from the front. As shown in FIG. 4, the swivel bracket 8 extends along the rear portions of the clamp brackets 6L and 6R when viewed from the side. It has a generally inverted L-shape. As shown in FIG. 3, the swivel bracket 8 is designed to have a size in which the cylinder device 26 and the pressure fluid supply device 28 fit within the entire width when viewed from the front, and the left and right sides of the cylinder device 26 and the pressure fluid supply device 28 It has a left-right symmetrical shape that can replace the positional relationship. Hereinafter, the shape of the swivel bracket 8 will be described in detail.

As shown in FIG. 3, on the left and right ends of the upper end of the swivel bracket 8, there are formed shaft attachment portions 40L and 40R which are attached to the tilt shafts 38 fixed to the clamp brackets 6L and 6R by nuts 36. The left and right shaft attachment portions 40L and 40R are connected to each other by an upper wall 42 and a lower wall 44 formed on the upper and lower sides of the tilt shaft 38, respectively. As shown in FIG. 3, the left and right shaft attachment portions 40L and 40R respectively form left and right side wall portions 46L (see FIG. 6) having a substantially inverted L-shape in side view.
6R includes a cylinder device 26 and a pressure fluid supply device 28.
As shown in FIG. 5, the lower ends of the left and right side walls 46L, 46R
They are connected by a connecting portion 48 extending left and right. As shown in FIG. 4, the right and left ends of the connecting portion 48 project forward and tilt pins 32L, 32 at the time of tilting down.
Projection pieces 50L and 50R are provided to abut on R from behind to maintain the posture of the outboard motor main body 12. In addition,
As shown in FIG. 4, the tilt pins 32L and 32R are fitted in the front pin hole 52a of the two front and rear pin holes 52a and 52b to be selected, and the swivel bracket 8 is connected to the cylinder device 26 and the pressure fluid supply device 28. Is in the position closest to you.

As shown in FIG. 5, a vertically long center boss 5 is connected to the lower wall 44 and the steering shaft cylinder 10 at the center in the left-right direction at the upper part of the swivel bracket 8.
4 are integrally formed in a rib shape.
Has a shaft hole 54a penetrating in the left-right direction. Also, center bosses 54 on the left and right side walls 46L, 46R.
A pair of left and right side bosses 56L, 5L
6R are provided symmetrically, and each side boss 56L, 56R includes shaft holes 56L1, 56R1 having the same center line as the shaft hole 54a. As shown in FIG. 4, a recess 58 is formed below the center boss 54 so as to escape rearward with respect to the cylinder device 26 even when the cylinder device 26 is disposed at any of the left and right positions. The recess 58 prevents the cylinder body 26 a from interfering with the swivel bracket 8. The lower end of the recess 58 and the left and right side walls 46L,
46R, as shown in FIG. 5, is integrally connected by a pair of left and right horizontally long ribs 60L and 60R. Also,
As shown in FIG. 3, the upper end of the pressure fluid supply device 28 has the center boss 54 and the side bosses 56L, 56R.
It is set so as to be located sufficiently below, so that it does not interfere with the center boss 54 or the like regardless of whether it is arranged on the left or right side.

According to the present embodiment having the above-described structure, as shown in FIGS. 1 and 2, the lead wire 62 connected to the motor of the pressure fluid supply device 28 is connected to the port side of the lower cover 16 on the port side. Engine unit 1 from side wall 16L
4, the pressure fluid supply device 28 and the cylinder device 26 are arranged with the pressure fluid supply device 28 on the port side and the cylinder device 26 on the starboard side. In this case, as shown in FIG.
The upper connecting portion 26 of the piston rod 26b is provided between the starboard side boss 56R and the center boss 54 of the L and 56R.
The shaft hole 56R of the side boss 56R on the starboard side
1. By passing the upper support rod 64 through the through hole 26b2 of the upper connection part 26b1 and the shaft hole 54a of the center boss 54, the upper connection part 26b1 is axially mounted on the upper support rod 64. Further, the lower connecting portion 26a1 of the cylinder device 26
As shown in FIG. 3, the through hole 26a2 is fitted on the starboard side of the lower support rod 66 bridged over the bosses 34L, 34R at the lower ends of the clamp brackets 6L, 6R, and the port of the lower connection portion 26a1 is ported. Side flank and port side boss 3
A spacer 68 is interposed between the surface facing the 4L side surface.

In this case, the lead wire 62
As shown in FIG. 3, after extending upward from the upper end of the pressure fluid supply device 28 and bending to the port side, it passes through the vicinity of the lower side of the shaft attachment portion 40 </ b> L on the port side of the swivel bracket 8 to the outside, and further to the port side. It is taken out from the take-out hole 30 (see FIG. 2) of the clamp bracket 6L on the side. As shown in FIG. 1, the lead wire 62 protrudes outward and curves upward while extending inward from the outlet hole 30, and is wired into the engine unit 14 from the port side wall 16 </ b> L of the lower cover 16. .

On the other hand, as shown in FIG. 7, when the lead wire 62 connected to the motor of the pressure fluid supply device 28 is wired from the side wall on the starboard side of the lower cover 16 to the inside of the engine unit 14, the piston The upper connecting portion 26b1 of the rod 26b is supported by the upper support rod 64 between the port side boss 56L and the center boss 54,
Thus, the cylinder device 26 is disposed on the port side, and the pressure fluid supply device 28 is disposed on the starboard side. In this case, the lead wire 62 extends upward from the upper end of the pressure fluid supply device 28 on the starboard side, bends to the starboard side, and the outlet hole 30 on the starboard side.
After being taken out of the clamp bracket 6 </ b> R (not shown), it is wired to the inside of the engine unit 14 from the starboard side wall of the lower cover 16.

As described above, according to the present embodiment, the pressure fluid supply device 28 can be selectively disposed on one of the left and right sides of the swivel bracket 8, while the cylinder device 26 is disposed on the other side. Piston rod 2 between the side boss 56L or 56R and the center boss 54.
6b can be supported via the upper support rod 64. Therefore, the lead wire 62
The pressure fluid supply device 28 can be disposed on either the left or right side in accordance with the wiring of
2 can be easily performed and the lead wires 62
Can be shortened. Also, for example, when two outboard motors are mounted side by side on the hull 4, the pressure fluid supply devices 28 in each outboard motor can be arranged on the side adjacent to each other. The lead wires 62 can be wired collectively.

As shown in FIG. 3, a cylinder device 26 and a pressure fluid supply device 28 are disposed on both left and right sides of the center line C of the swivel bracket 8 when viewed from the front. Since the device 26 can be arranged offset by the distance D), both devices can be compactly arranged between the swivel bracket 8 and the clamp brackets 6L, 6R.

Further, in the present embodiment, since the center boss 54 is formed in a rib shape along the vertical direction, high rigidity of the swivel bracket 8 can be obtained.

The present embodiment is a preferred embodiment of the present invention, and the technical scope of the present invention is not limited to this embodiment.

[0028]

As described above, according to the present invention, in the power tilt device of the outboard motor, the cylinder device and the like are compactly arranged, and the lead wires related to the pressure fluid supply device are easily wired. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of an outboard motor according to the present embodiment.

FIG. 2 is a side view of the outboard motor according to the embodiment.

FIG. 3 is a front view of the power tilt device of the present embodiment.

FIG. 4 is a side view of the power tilt device of the present embodiment.

FIG. 5 is a front view of the swivel bracket according to the embodiment.

FIG. 6 is a side view of the swivel bracket according to the embodiment.

FIG. 7 is a front view of the power tilt device of the present embodiment, in which the pressure fluid supply device is disposed on the starboard side.

FIG. 8 is a front view of a conventional power tilt device.

FIG. 9 is a side view of a conventional power tilt device.

[Explanation of symbols]

 2 Power tilt device 4 Hull 6L, 6R Clamp bracket 8 Swivel bracket 12 Outboard motor main body 26 Cylinder device 26b Piston rod 28 Pressure fluid supply device 54 Center boss 56L, 56R Side boss 64 Upper support rod 66 Lower support rod C Centerline of swivel bracket

Claims (1)

(57) [Claims] 1. A pair of left and right clamp brackets fixed to a hull, a swivel bracket supported by the pair of right and left clamp brackets to be tiltable and capable of steering the outboard motor main body, and the swivel bracket. A cylinder device interposed between the clamp bracket and
A pressure fluid supply device having a motor connected to the cylinder device and supplying a pressure fluid to the cylinder device, the power tilt device for an outboard motor comprising: On the other hand, the upper end of the piston rod is supported by the swivel bracket via the upper support rod, and is located on one side to the left and right with respect to the center line of the swivel bracket in front view. Arrange the cylinder device,
In the arrangement in which the pressure fluid supply device is disposed on the other side, the swivel bracket has a shape capable of replacing the left-right positional relationship between the cylinder device and the pressure fluid supply device, and is provided at a central portion of the swivel bracket. A center boss is provided, and an upper end of the pressure fluid supply device is positioned below the center boss, and a pair of left and right side bosses are provided symmetrically on both left and right sides with respect to the center boss,
An outboard motor characterized in that an upper end of the piston rod is supported via the upper support rod between the center boss and the side boss on the side where the cylinder device is disposed among the pair of left and right side bosses. Power tilt device.