JPH11187546A - Wiring harness attachment structure of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide wiring harness attachment structure of an engine which can be applied to an engine which has electric components in its rocker case and enables easy installation of a wiring harness in a relatively narrow space. SOLUTION: A wiring harness attachment structure has a rocker case 2, a through-hole 5 drilled in the side wall 2a of the rocker case 2, a pipe 6 which is inserted into the through-hole 5 with a sealing member 7 therebetween so as to be liquid-tight and a wiring harness 4 which is connected to electric components 3 in the rocker case 2 through the pipe 6. The pipe 6 is bent approximately perpendicularly from a direction along the side wall 2a of the rocker case 2 to a direction through the through-hole 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine harness mounting structure, and more particularly to an engine harness mounting structure applied to an engine having electric components in a rocker case.

[0002]

2. Description of the Related Art Conventionally, in an engine having an electric component in a rocker case, a harness is arranged in the rocker case by a method as shown in FIGS. 3 and 4, for example. Here, FIGS. 3 and 4 are schematic diagrams each showing an example of a conventional harness mounting structure of an engine, FIG. 3 is a schematic top view showing the engine partially cut away, and FIG. It is a typical sectional view expanding and showing a connector attaching part.

In FIG. 3, reference numeral 101 denotes an engine, 102 denotes a rocker case, 103 denotes an injector (electrical component), and 104 denotes a harness connected to the injector 103. Also, in this engine 101,
The injector 103 is provided above each cylinder. That is, the engine 101 is an engine configured so that fuel is supplied directly from the injector 103 into the cylinder, and is specifically a common rail diesel engine, a direct injection gasoline engine, or the like.

The harness 104 includes a rocker case 1.
The connector 103 is connected to control means such as an ECU (not shown) outside the rocker case 102 via a connector 105 attached thereto, and the operation of the injector 103 is controlled based on a control signal from the ECU. By the way, in such an engine 101, a harness 104 is also provided in a rocker case 102 as shown in the figure, and the harness 104 and the rocker case 102 are arranged as shown in FIGS. It is fixed using the connector 105.

The connector 105 is composed of three members, an internal connector 105a, an intermediate connector 105b, and an external connector 105c. Of these, the intermediate connector 105b is a seal member (O-ring) 107 shown in FIG. Is fixed to the rocker case 102 via the Further, the rocker case 1 is attached to the internal connector 105a.
One end of the harness 104 inside the locker case 02 is electrically connected to the external connector 105c, and one end of the harness 104 outside the rocker case is also electrically connected to the external connector 105c.

Then, an internal connector 105a and an external connector 105c are inserted into the intermediate connector 105b, and these two connectors 105a and 105c are inserted.
Are electrically connected, the harness 104 is connected outside and inside the rocker case 102. In addition, 1
Reference numeral 06 denotes a clamp for fixing the harness 104 in the rocker case 102.

[0007]

However, such a conventional technique requires a work space for attaching the internal connector 105a to the intermediate connector 105b, and has a problem that the space efficiency is not good. That is, in the conventional structure as described above, as shown in FIG. 3, when attaching the internal connector 105a to the intermediate connector 105b, the internal connector 105a is attached to the intermediate connector 105b from a direction perpendicular to the side wall 102a of the rocker case 102. Because they will be connected, they need this much work space.

Further, since the internal connector 105a is connected to the intermediate connector 105b from a direction perpendicular to the side wall 102a of the rocker case 102, if the harness 104 is arranged along the side wall 102a of the rocker case 102, as shown in FIG. As shown in (1), there is a problem that the harness 104 is largely bent in the vicinity of the place where the connector 105 is mounted, and a large space is required accordingly. In addition, this causes a problem that the clearance with a movable part (hereinafter, referred to as an interference object) 108 such as a timing gear decreases, and it becomes difficult to arrange the harness 104.

Furthermore, since the rocker case 102 is filled with engine oil, it is necessary to seal the engine oil so that the engine oil does not leak from the mounting portion of the connector 105. There is a problem that the shape of the connector 105 becomes large and the arrangement place is restricted. Further, with the above-described fixing by the clamp 106 or the like, there is a problem that the positioning of the harness 104 becomes unstable, and the harness 104 cannot be disposed near the interference object 108.

It should be noted that Japanese Utility Model Application Laid-Open No. 58-98711, Japanese Utility Model Application Laid-Open No. 57-125134 and Japanese Utility Model Application Laid-Open No. 57-445.
No. 81 discloses a related technique, but none of such techniques can solve the above-mentioned problem. The present invention has been made in view of such a problem, and enables a harness to be easily arranged even in a relatively small space, and has an excellent sealing function.
An object of the present invention is to provide an engine harness mounting structure.

[0011]

Therefore, in the engine harness mounting structure according to the first aspect of the present invention, a pipe is inserted in a liquid-tight manner through a through hole in a side wall of the rocker case via a seal member. A pipe is bent at a substantially right angle from a direction along the side wall of the rocker case to a direction penetrating the through-hole, and a harness connected to an electric component in the rocker case is provided in the pipe.

According to the second aspect of the present invention, in the engine harness mounting structure, a seal member is fitted into a tapered through hole having a diameter reduced toward the inside of the rocker case, and penetrated from outside the rocker case. Fix the plate to the rocker case so as to cover the holes. At this time, the diameter of the seal member is reduced by being pressed by the plate, and the space between the through hole and the seal member and the space between the seal member and the pipe are kept liquid-tight.

In the engine harness mounting structure according to the third aspect of the present invention, a rubber cap is provided on at least one of both ends of the pipe to prevent oil leakage from inside the pipe to the outside of the rocker case. To prevent.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing the entire structure of an engine harness mounting structure according to an embodiment of the present invention. FIG. 2 is a schematic sectional view showing the configuration of the main part. In FIG. 1, reference numeral 1 denotes an engine, 2 denotes a rocker case, 3 denotes an injector as an electrical component, and 4 denotes a harness connected to the injector 3. The injectors 3 are arranged above the cylinders of the engine 1, and the fuel is supplied directly from the injectors 3 into the cylinders.

The harness 4 is connected to a control means such as an ECU (not shown) outside the rocker case 2, and the injector 3 is controlled based on a control signal from the ECU. I have. As shown in FIG. 2, a through hole 5 is formed in the side wall 2 a of the rocker case 2, and a resin or metal pipe 6 is inserted into the through hole 5 via a rubber seal (seal member) 7. Has been inserted. A harness 4 is provided in the pipe 6, whereby the harness 4 is provided so as to pass through the side wall 2 a of the rocker case 2.

As shown in FIGS. 1 and 2, the pipe 6 penetrates the through hole 5 from the direction along the side wall 2a inside the rocker case 2 (left-right direction in the figure) (vertical direction in the figure). The harness 4 is formed in a shape bent substantially at right angles to the pipe 6. By passing the harness 4 through such a pipe 6, the radius of curvature of the harness 4 near the through hole 5 can be reduced, and the space efficiency is excellent. A harness mounting structure can be obtained. Therefore, it is possible to arrange the harness 4 along the side wall 2a of the rocker case 2 also in the vicinity of the through hole 5, and to arrange the harness 4 also in the vicinity of the interference object 12 as shown in FIG. You can do it. Note that the interference object 12 may be a component such as a timing gear or a rocker shaft.

The pipe 6 is fixed to the side wall 2a by a clamp 10 in the rocker case 2, whereby the movement of the pipe 6 is restricted. By the way, as shown in FIG. 2, the through-hole 5 is formed in a tapered shape whose diameter is reduced toward the inside of the rocker case 2, and a bottom portion 5a is formed at a tip portion thereof (closer to the inside of the rocker case 2). Is formed.

The rubber seal 7 is formed in a tapered shape corresponding to the through hole 5 and is formed so as to be thicker than the depth of the through hole 5. The rubber seal 7 may be formed in a tapered shape having a slightly larger diameter than the through hole 5 in addition to the above shape. The rubber seal 7 is fixed to the rocker case 2 by using a plate 8 as shown in FIG. 2, and the rubber seal 7 is pressed against the plate 8 and elastically deformed, thereby providing a sealing function. It is designed to demonstrate.

That is, the plate 8 is attached to the rocker case 2 so as to cover the rubber seal 7 with the bolt 9. As the bolt 9 is tightened, the rubber seal 7 is pressed by the plate 8. Thus, it comes into close contact with the through hole 5. At this time, since the through hole 5 is formed in a tapered shape, when the rubber seal 7 is pressed against the plate 8, the rubber seal 7 is pressed.
Is exerted in the radial direction to tighten the pipe 6, whereby the rubber seal 7 and the rocker case 2 and the rubber seal 7 and the pipe 6 come into close contact with each other. Thus, the liquid tightness between the through hole 5 and the pipe 6 is maintained, and leakage of engine oil and the like from the through hole 5 is prevented.

As shown in FIG. 1, rubber caps 11 are attached to both ends of the pipe 6.
In this case, the rubber cap is omitted), and the rubber cap 11 closes the openings at both ends of the pipe 6. This prevents the engine oil and the like from leaking to the outside of the rocker case 2 through the inside of the pipe 6.

When the rubber cap 11 is attached to the end of the pipe 6 that protrudes inside the rocker case 2, the engine oil in the rocker case 2 causes the oil between the pipe 6 and the harness 4. It is possible to prevent the oil from penetrating into the gap therebetween, and therefore, it is possible to prevent the engine oil from leaking between the pipe 6 and the harness 4. Also,
When the rubber cap 11 is attached to the end protruding outside the rocker case 2, even if the engine oil enters between the pipe 6 and the harness 4, the engine oil leaks to the outside due to the rubber cap 11. Can be prevented.

In this embodiment, the rubber cap 1
Although the example in which 1 is provided at both ends of the pipe 6 has been described, it is not always necessary to provide the rubber caps 11 at both ends of the pipe 6, and it is sufficient to provide the rubber caps at at least one of the two ends. Since the harness mounting structure as one embodiment of the present invention is configured as described above, when arranging the harness 4 in the rocker case 2, work is performed, for example, in the following procedure.

First, the rubber cap 11 and the pipe 6 are attached to the harness 4, and the rubber seal 7 is attached to the pipe 6. Next, the harness 4 and the pipe 6 are passed through the through hole 5 of the rocker case 2 so that the positions of the through hole 5 and the rubber seal 7 are aligned. Then, the rubber seal 7 is covered from the outside of the rocker case 2 so that the plate 8
Attach. At this time, when the bolts 9 for fixing the plate 8 are tightened, the rubber seal 7 is pressed by the plate 8 and pressed against the through hole 5, and the space between the rubber seal 7 and the through hole 5 is maintained in a liquid-tight manner. . Also, as shown in FIG. 2, by forming the rubber seal 7 and the through hole 5 in a tapered shape, when the rubber seal 7 is pressed by the plate 8, the force acting on the rubber seal 7 acts in the radial direction. The diameter of the rubber seal 7 is reduced, whereby the pipe 6 is tightened, and the space between the rubber seal 7 and the pipe 6 is kept liquid-tight.

Finally, the position of the pipe 6 is fixed by using the clamp 10. According to the harness mounting structure for an engine of the present invention, the harness 4
Is arranged in the rocker case 2, a harness mounting structure that is more space efficient than the case where the conventional connector (see FIGS. 3 and 4) is used can be obtained.

That is, in the structure using the conventional connector, the harness 4 is largely bent in the vicinity of the connector, and a large space is required. However, according to the present invention, the pipe formed at a substantially right angle is provided. 6, the radius of curvature in the vicinity of the through hole 5 of the harness 4 can be reduced, and the harness 4 can be locked in the vicinity of the through hole 5. It is possible to dispose it along the side wall 2a of the case 2. As a result, a space-saving harness mounting structure can be provided as compared with the conventional harness mounting structure.

Further, since the harness 4 can be arranged in the vicinity of the interference object 12, there is an advantage that the degree of freedom of layout and design of the components in the rocker case 2 is greatly improved, and the conventional art has the advantage. An extremely simple configuration in which a pipe 6 formed at a substantially right angle is used instead of the connector and the harness 4 is passed through the pipe 6 has an advantage that the cost can be significantly reduced.

Further, there is an advantage that the work of arranging the harness 4 itself becomes easy. In other words, in the related art, since the internal connector (see 105a in FIGS. 3 and 4) in the rocker case 2 is attached to the intermediate connector (see 105b) attached to the side wall 2a of the rocker case 2, the worker needs to use the rocker case. It was necessary to put hands in the narrow space inside 2 and connect the connectors together, and the workability was not good. On the other hand, in the harness mounting structure of the present invention, the pipe 6 is passed through the through hole 5, and then the bolt 9 is tightened to fix the plate 8, so that the work is also facilitated.

Further, since it is not necessary to secure a working space for connecting the connector in the rocker case 2, the space can be saved from such a viewpoint. Further, the through hole 5 is formed in a tapered shape in which the diameter is reduced toward the inside of the rocker case 2, the rubber seal 7 is formed in a tapered shape corresponding to the through hole 5, and the thickness of the rubber seal 7 is reduced by the through hole. 5 has an effect that the gap between the rubber seal 7 and the pipe 6 and the gap between the rubber seal 7 and the through hole 5 are reliably sealed. That is, when the plate 8 is attached to the rocker case 2 and the bolts 9 are tightened, the rubber seal 7 is pressed by the plate 8 and closely adheres to the through-hole 5.
And the through hole 5 are securely sealed, and the rubber seal 7 is reduced in diameter in the radial direction to tighten the pipe 6, whereby the gap between the rubber seal 7 and the pipe 6 is reliably sealed. It is.

Thus, there is an advantage that the liquid tightness between the through hole 5 and the pipe 6 is maintained, and leakage of engine oil and the like from the through hole 5 can be prevented. Further, by attaching the rubber cap 11 to the end of the pipe 6, it is possible to prevent engine oil or the like from leaking to the outside of the rocker case 2 through the inside of the pipe 6, thereby improving the liquid tightness. .

The engine harness mounting structure of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0031]

As described above in detail, according to the engine harness mounting structure of the present invention, the pipe is liquid-tightly inserted into the through hole in the side wall of the rocker case via the seal member. The configuration is such that the pipe is bent at a substantially right angle from the direction along the side wall of the rocker case to the direction penetrating the through hole, and the harness connected to the electrical components in the rocker case is provided in the pipe, thereby reducing the number of pipes. A harness can be provided in a space, and a harness mounting structure with high space efficiency can be provided. That is,
By passing the harness through a pipe formed to be bent substantially at a right angle, the harness can be arranged without a large bend in the vicinity of the through hole,
There is an advantage that the degree of freedom in design is greatly improved. In addition, the simple configuration as described above has the advantage that the cost can be reduced as compared with the structure using the conventional connector, and the work of arranging the harness becomes easy.

According to the engine harness mounting structure of the present invention, the through-hole and the seal are formed in a simple configuration in which the through-hole is formed in a tapered shape whose diameter is reduced toward the inside of the rocker case. There is an advantage that the space between the members can be reliably sealed. According to the third aspect of the present invention, it is possible to prevent engine oil and the like from leaking to the outside of the rocker case through the inside of the pipe, thereby further improving liquid tightness. There is an advantage.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing the entire configuration of an engine harness mounting structure according to an embodiment of the present invention, as viewed from above the engine.

FIG. 2 is a schematic cross-sectional view showing a configuration of a main part of a harness mounting structure for an engine according to an embodiment of the present invention.

FIG. 3 is a schematic view showing an example of a conventional engine harness mounting structure.

FIG. 4 is a schematic view showing an example of a conventional engine harness mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Rocker case 2a Side wall 3 Injector as an electrical component 4 Harness 5 Through hole 5a Bottom part 6 Pipe 7 Rubber seal (seal member) 8 Plate 9 Bolt 10 Clamp 11 Rubber cap 12 Interfering object

Claims (3)

[Claims] A rocker case; a through hole formed in a side wall of the rocker case; a pipe inserted into the through hole in a liquid-tight manner via a seal member; and the rocker case passing through the pipe. A harness connected to an electrical component inside the pipe, wherein the pipe is formed to be bent at a substantially right angle from a direction along a side wall of the rocker case to a direction penetrating the through hole. Harness mounting structure. 2. A plate attached to the rocker case is provided so as to cover the through hole from outside the rocker case, and the through hole is formed in a tapered shape having a diameter reduced toward the inside of the rocker case. The seal member is provided in the through hole from outside the rocker case, and when the plate is fixed to the rocker case, the seal member is pressed by the plate to reduce the diameter, and The engine harness mounting structure according to claim 1, characterized in that the space between the seal member and the seal member is held in a liquid-tight manner. 3. The engine harness mounting structure according to claim 1, wherein a rubber cap is mounted on at least one of both ends of the pipe.