JPH0730714B2 - Mounting structure of the electronic component unit to the outboard engine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stores a component group of an electronic component in a case in which it is placed on a substrate,
The present invention relates to a mounting structure for an outboard motor engine of an electronic component unit having a resin filled inside.

[0002]

2. Description of the Related Art In recent years, electronic control of outboard motors has been proposed using an electronic component unit such as a microcomputer. Here, the electronic component unit is configured by accommodating the constituent element group of the electronic component in the case under the condition of being arranged on the substrate and filling the case with resin.

[0003]

By the way, the electronic component unit is vulnerable to vibration such as engine vibration, and causes a trouble in its electrical performance, for example, the vibration causes damage to the connecting portion between the component and the substrate. There is fear. Further, the electronic component unit is vulnerable to heat, and when it is mounted around the engine, which has a high temperature, there is a possibility that trouble may occur in its electrical performance.

The present invention has been made in view of the above problems, and an object of the present invention is to sufficiently protect an electronic component unit from vibration and heat of an outboard engine. Is intended to provide a mounting structure for an outboard engine.

[0005]

In order to achieve the above object, in the present invention, a group of constituent elements of an electronic component is housed in a case in which it is placed on a substrate, and the case is housed in the case. The mounting structure of the resin-filled electronic component unit to the outboard engine is such that the surface including the substrate of the electronic component unit is arranged in a state substantially orthogonal to the main direction of vibration generated in the outboard motor. The unit is arranged on a mounting bracket made of a plate member, and the mounting bracket is fixed to an engine side mounting base via a rubber damper.

[0006]

According to the above structure, the surface of the electronic component unit including the substrate is arranged substantially orthogonal to the main direction of vibrations generated in the outboard motor. Therefore, the direction in which the electronic component unit has high vibration resistance is the outboard motor. The direction corresponding to the major direction, ie, the main direction, of the generated vibration is matched, and the electronic component unit is reasonably protected from the vibration.

Further, since the electronic component unit is disposed on the mounting bracket made of a plate member and the mounting bracket is fixed to the engine side mounting base via the rubber damper, heat transfer from the engine to the electronic component unit is prevented. The rubber damper can be used to block the heat, and the mounting bracket made of a plate member allows sufficient heat dissipation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing an outboard motor 10 to which the present invention is applied partially broken, FIG. 2 is a view taken along the line EE in FIG. 1, and FIG. 3 is an electronic component shown in FIGS. It is an expanded side view which shows a unit partially broken.

A clamp bracket 12 is fixed to the stern plate 11 of the hull, and a swivel bracket 14 is supported on the clamp bracket 12 via a tilt shaft 13 so as to be tiltable around a horizontal axis. A steered shaft 15 is rotatably supported on the swivel bracket 14 about a vertical axis, and a propulsion unit 18 is integrated with the steered shaft 15 via upper and lower support members 16 and 17. A V-type engine 19 is mounted on top of the propulsion unit 18. The output of the engine 19 is the drive shaft vertically installed in the propulsion unit 18,
The propeller 20 is rotatable via the forward / reverse switching device.

The outboard motor 10 has a cowling 21.
The engine 19 is covered with the to protect the engine 19 from fog such as rainwater and seawater. Furthermore, cowling 2
An intake port 22 is formed in the upper rear part of the cowling 1, and the cowling 2 is provided through an air intake passage 24 defined between the intake port 22 and the cover 23.
The outside air can be introduced into 1.

The engine 19 of the outboard motor 10
For example, in order to make the ignition timing electronically controllable,
The electronic component unit 25 as shown in FIG. The electronic component unit 25 accommodates a large number of constituent elements 26 of electronic components in a case 28 in a state of being arranged on a printed board 27, and at the same time, a resin filling formed by a resin filled in the case 28. The case 28 is covered by the part 29.
Holding in. In addition, 30 is a cap.

Here, in the resin-filled portion 29, the internal air that has not completely escaped to the outer space when the resin is solidified remains as bubbles, etc., so that the resin-filled portion 29 completely surrounds the periphery of each component 26 and the substrate 27. Encapsulation without gaps is very difficult, and the component 26 is shaken by the vibration generated in the plane including the substrate 27, and the connection between the component 26 and the substrate 27 may be damaged. That is, the electronic component unit 25 has the vibration resistance characteristic that it is weak against the vibration generated in the plane including the substrate 27 and strong against the vibration orthogonal to the plane including the substrate 27.

On the other hand, in this outboard motor 10, the spring constant of the elastic material forming the upper and lower support members 16 and 17 is small in the front-rear direction, and the vibration of the engine 19 is adjusted by adjusting the crank balance of the engine 19. The major direction, ie, the main direction, is made to coincide with the front-back direction in which the damping effect of the elastic material is high. That is, in the outboard motor 10, the main direction of vibration of the engine 19 is set in the engine central axis direction along the propulsion direction of the outboard motor 10 shown by the XX line in FIG.

Therefore, in the outboard motor 10, the board 27 of the electronic component unit 25 is arranged so that the direction of high vibration resistance of the electronic component unit 25 coincides with the main direction of vibration generated in the outboard motor 10. The plane including the plane is arranged orthogonal to the main direction of the vibration. That is, the mounting base is attached to the central portion 19C of both cylinders 19A and 19B forming the V-shape of the engine 19.
The base 31 is fixed by the mounting screw 32, and the mounting base 3
1, a box-shaped mounting bracket 34 made of a plate member is fixed by a mounting screw 35 via a rubber damper 33, and a board 27 of the electronic component unit 25 is arranged on the mounting bracket 34 orthogonally to the central axis of the engine 19. It is fixed by a mounting screw 36.

Further, the electronic component unit 25 mounted as described above is located below the intake port 22 provided in the cowling 21, that is, at the portion exposed to the entry path of the outside air, and the heat radiation of the engine 19 is released. It is also possible to protect from the temperature. The electronic component unit 25
In addition to encapsulating the component 26 and the substrate 27 with the resin filling portion 29, a seal member is interposed between the case 28 and the cap 30 if necessary, and the constituent element 26 and the substrate 27 enter from the intake port 22. It is said that it can be sufficiently protected from water drops contained in the open air.

That is, the electronic component unit 25 is weak against the vibration generated in the plane including the substrate 27 and strong against the vibration orthogonal to the plane including the substrate 27. The high vibration resistance direction of 25 coincides with the major direction of vibration generated in the outboard motor 10, that is, the main direction, and the electronic component unit 25 can be reasonably protected from vibration.

Since the electronic component unit 25 is fixed to the mounting base 31 on the engine side via the rubber damper 33, vibration transmission from the engine 19 to the electronic component unit 25 can be damped by the rubber damper 33. The electronic component unit 25 can be reliably protected from the vibration of the outboard motor engine 19. Further, the electronic component unit 25 is arranged on a mounting bracket 34 made of a plate member, and the mounting bracket 34 is mounted on the engine side via a rubber damper 33.
Since the heat transfer from the engine 19 to the electronic component unit 25 can be substantially blocked by the rubber damper 33 and the mounting bracket 34 made of a plate member can sufficiently dissipate the heat, the electronic component unit 25 is fixed. It is possible to sufficiently protect the heat from the heat.

FIG. 4 is an enlarged side view showing an electronic component unit 25A as a modified example of the electronic component unit 25 with a part thereof cut away. This electronic component unit 25A is different from the electronic component unit 25 in that the cap 30
The case 28A is attached to the mounting bracket 34 in a state of being inverted as compared with the case 28 without using. Therefore, also in this case, the electronic component unit 2
5A has its substrate 27 arranged substantially orthogonal to the main direction of vibration generated in the outboard motor, and is reasonably protected from vibration, and is also sufficiently protected from heat by the presence of the rubber damper 33 and the mounting bracket 34. It is a thing.

Although the above embodiment has described the case where the present invention is applied to the outboard motor 10 having the V-type engine 19, the present invention is not limited to the V-type engine, and is a ship equipped with a serial engine or the like. It can also be applied to external machines.

[0020]

According to the present invention described in detail above, since the surface of the electronic component unit including the substrate is arranged substantially orthogonal to the main direction of vibration generated in the outboard motor, the electronic component unit has high vibration resistance. The direction matches the major direction of the vibration generated in the outboard motor, that is, the main direction, and the electronic component unit can be reasonably protected from the vibration.

At the same time, the electronic component unit is arranged on a mounting bracket made of a plate member, and the mounting bracket is fixed to the engine-side mounting base via a rubber damper, so that heat transfer from the engine to the electronic component unit is achieved. Can be almost blocked by a rubber damper, and is sufficiently radiated by a mounting bracket made of a plate member, so that the electronic component unit can be sufficiently protected from heat.

[Brief description of drawings]

FIG. 1 is a side view showing a partially broken outboard motor to which an embodiment of the present invention is applied.

FIG. 2 is a view taken along the line EE in FIG.

FIG. 3 is an enlarged side view showing an electronic component unit according to the embodiment with a part thereof cut away.

FIG. 4 is an enlarged side view showing a modification of the electronic component unit with a part thereof broken away.

[Explanation of symbols]

 10 Outboard Motor 19 Engine 25, 25A Electronic Component Unit 26 Component 27 Substrate 28 Case 29 Resin Filling Part 31 Mounting Base 33 Rubber Damper 34 Mounting Bracket

Claims (1)

[Claims] 1. An engine for an outboard motor of an electronic component unit, wherein a component group of electronic components is placed in a case in a state of being arranged on a substrate, and a resin is filled in the case. In the mounting structure of, the surface including the board of the electronic component unit is arranged in a state substantially orthogonal to the main direction of vibration generated in the outboard motor, and the electronic component unit is arranged on the mounting bracket made of a plate member,
A structure for mounting an electronic component unit to an outboard engine, wherein the mounting bracket is fixed to a mounting base on an engine side via a rubber damper.