JPH0541710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a corrosion protection device for a marine propulsion device, and particularly to a corrosion protection device provided with an anode to prevent corrosion of the main body of a marine propulsion device.

[Prior Art] Generally, since the main body of a marine propulsion device is exposed to seawater, corrosion progresses due to electrolytic action. Therefore, in the past, a metal that has a higher ionization tendency than the metal that makes up the main body of the marine propulsion device is placed in the main body as a so-called sacrificial metal, and this sacrificial metal corrodes before the main body to prevent corrosion of the main body. things are being done. The sacrificial metal is called an anticorrosion anode.

Therefore, the shape of the anode is selected depending on the mounting location on the main body of the marine propulsion device, but in order to effectively exert its anticorrosion function, it is best to make the surface area as large as possible. In many cases, the surface of the anode has irregularities.

[Problems to be Solved by the Invention] By the way, when the anode is exposed to seawater, it corrodes itself due to electrolytic action, but at the same time scale is generated on its surface. Since the generation of this scale is detrimental to the anticorrosion function of the anode, it is necessary to periodically remove the scale using a brush or the like.

However, in the case of the anode in which irregularities are formed to increase the surface area of the anode as described above, the current situation is that it is difficult to remove the scale from the irregular surface.

The present invention was devised in view of the problems of the prior art, and its purpose is to increase the surface area of the anode, and
It is an object of the present invention to provide a corrosion protection device for a ship propulsion device that facilitates the removal work of scale when it occurs.

[Means for solving the problems] In order to achieve such objects, the present invention has the following features:
A corrosion protection device for a marine propulsion device in which an anticorrosion anode is attached to a marine propulsion device to prevent corrosion of the propulsion device body, and the anode surface is formed with unevenness and the unevenness extends in approximately one direction. It is.

[Operation] Since the irregularities formed on the anode surface extend approximately in one direction as described above, the scale can be removed extremely easily by brushing along the extending direction.

[Example] The present invention will be described below based on an example shown in the drawings.

First, in FIGS. 1 and 2, a clamp bracket 14 is fixed to a stern plate 12 of a boat 10, and a swivel bracket 16 is supported on the clamp bracket 14 so as to be swingable around a horizontal axis 18. A drive unit 20 is carried on the swivel bracket 16, and the drive unit 20 is supported so as to be rotatable about an axis substantially perpendicular to the horizontal axis 18. In FIG. 1, reference numeral 22 denotes a propeller that is rotationally driven by an engine (not shown) mounted in the drive unit 20. As shown in FIG.

A so-called power tilt and trim device is interposed between the clamp bracket 14 and the swivel bracket 16, and reference numeral 24 denotes a tilt cylinder;
26 is a trim cylinder, and 28 is a motor that supplies pressure fluid to both cylinders. In addition, in FIG. 2, the reference numeral 27 is a reserve tank.

A corrosion-preventing anode 30 is attached to the lower edge of the clamp bracket 14. The anode 30 is formed relatively long in the width direction of the clamp bracket 14, as shown in detail in FIG.
In order to avoid this, the center portion thereof is curved so as to protrude downward, and is fixed to the clamp bracket 14 by bolts 32 at both ends in the longitudinal direction. As shown in FIG. 3, unevenness 34 is integrally formed on the surface of the anode 30, so that the overall surface area of the anode 30 is increased. As best shown in FIG.
8 and a concave portion 40, these convex portions 38 and concave portions 4
0 are alternately arranged at equal intervals, and these are each formed to extend substantially in one direction, in this embodiment, in the longitudinal direction. In addition, in Fig. 3, the number 4
2 is a bolt hole.

By forming the anode 30 in this way, although unevenness 34 is formed on its surface,
Since the unevenness 34 extends in approximately one direction, scale generated within the unevenness 34 can be easily removed by applying a brush along the extending direction. Note that both ends of the unevenness 34 in the extending direction are dead ends, but if these are formed to be open as they are, it becomes easier to remove the scale.

Such examples are shown in FIGS. 4-6.

In the example shown in FIG. 4, the convex portion 38 and the concave portion 40 extend in a direction perpendicular to the longitudinal direction of the entire anode 30, and the ends in the extending direction are open.

Further, in the example shown in FIG. 5, the convex portion 38 and the concave portion 4
0 are alternately extended at equal intervals obliquely with respect to the longitudinal direction of the entire anode 30, and both ends of the unevenness are open in the central portion.

In the example shown in FIG. 6, the convex portion 38 and the concave portion 4
0 extends in the longitudinal direction of the anode 30 as in the case of FIG. 3, and both ends thereof are open.

In addition, in FIGS. 4 to 6, the anode 30 is shown as having a linear shape as a whole, but depending on the attachment location, the anode 30 may be
It may also be formed in a curved manner, as in the example shown in FIG.

[Effect] As explained above, according to the present invention, the unevenness formed on the surface of the anticorrosive anode is formed so as to extend approximately in one direction, so that the surface area of the anode can be increased. It has the excellent effect that it can sufficiently exhibit its anticorrosion function, and that scale generated on its surface can be easily removed by applying a brush or the like along the extending direction of the irregularities.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of a corrosion protection device for a marine propulsion device according to the present invention, Fig. 2 is a front view of a clamp bracket, which is a main part of the embodiment, seen from the hull side, and Fig. 3 is a FIG. 4 is a perspective view showing another example of the anode, FIG. 5 is a perspective view showing another example of the anode, and FIG. 6 is a plan view showing another example of the anode. It is a perspective view showing an example. 20...Drive unit, 30...Anode, 34...Irregularities, 38...Protrusions, 40...Recesses.

Claims (1)

[Claims] 1. A corrosion protection device for a marine propulsion device in which a corrosion-preventing anode is attached to a marine propulsion device to prevent corrosion of the propulsion device body, wherein an unevenness is formed on the surface of the anode and the unevenness extends approximately in one direction. Corrosion protection device for ship propulsion equipment.