JP3714782B2 - Engine harness mounting structure - Google Patents

Description

[0001]
BACKGROUND 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 an electrical component in a rocker case.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an engine having an electrical component in a rocker case, a harness is disposed in the rocker case by a method as shown in FIGS. 3 and 4, for example.
Here, FIGS. 3 and 4 are both schematic views showing an example of a conventional engine harness mounting structure. FIG. 3 is a schematic top view showing the engine partially broken, and FIG. It is typical sectional drawing which expands and shows a connector attaching part.
[0003]
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.
Further, in the engine 101, the injector 103 is disposed at the top of each cylinder. That is, the engine 101 is an engine configured such that fuel is directly supplied from the injector 103 into the cylinder, and specifically, a common rail type diesel engine, an in-cylinder injection type gasoline engine, or the like.
[0004]
The harness 104 is connected to control means such as an ECU (not shown) outside the rocker case 102 via a connector 105 attached to the rocker case 102, and the injector 103 is connected to the injector 103 based on a control signal from the ECU. Operation is controlled.
By the way, in such an engine 101, a harness 104 is also disposed in the rocker case 102 as shown in the figure. The harness 104 and the rocker case 102 are as shown in FIGS. It is fixed using the connector 105.
[0005]
Here, the connector 105 includes three members, an internal connector 105a, an intermediate connector 105b, and an external connector 105c. Among these members, the intermediate connector 105b is connected via a seal member (O-ring) 107 shown in FIG. It is fixed to the rocker case 102.
One end of a harness 104 in the rocker case 102 is electrically connected to the internal connector 105a, and one end of the harness 104 outside the rocker case is also electrically connected to the external connector 105c. Yes.
[0006]
The harness 104 is connected between the outside and the inside of the rocker case 102 by inserting the internal connector 105a and the external connector 105c into the intermediate connector 105b and electrically connecting the two connectors 105a and 105c. . Reference numeral 106 denotes a clamp for fixing the harness 104 in the rocker case 102.
[0007]
[Problems to be solved by the invention]
However, such a conventional technique requires a work space for attaching the internal connector 105a to the intermediate connector 105b, and there is 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 connected to the intermediate connector 105b from the direction perpendicular to the side wall 102a of the rocker case 102. Since it will be connected, this amount of work space is required.
[0008]
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, when the harness 104 is disposed along the side wall 102a of the rocker case 102, as shown in FIG. In addition, the harness 104 is largely bent in the vicinity of the mounting position of the connector 105, and there is a problem that a large space is required. In addition, this reduces the clearance with a movable part 108 (hereinafter referred to as an interfering object) 108 such as a timing gear, which makes it difficult to dispose the harness 104.
[0009]
Furthermore, since the rocker case 102 is filled with engine oil, it is necessary to seal the engine oil so that it does not leak from the mounting portion of the connector 105. There exists a subject that a shape enlarges and the arrangement | positioning place will be restrict | limited.
In addition, the fixing with the clamp 106 or the like as described above causes the positioning of the harness 104 to be unstable, and there is a problem that the harness 104 cannot be disposed in the vicinity of the interference object 108.
[0010]
Related arts are also disclosed in Japanese Utility Model Laid-Open Nos. 58-98711, 57-125134, and 57-44581, all of which are described above. It was not something that could solve the problem.
The present invention was devised in view of these problems, and it is an object of the present invention to provide an engine harness mounting structure that can easily arrange a harness even in a relatively narrow space and has an excellent sealing function. And
[0011]
[Means for Solving the Problems]
Therefore, the harness attachment structure for an engine of the present invention according to claim 1, as well as fitted to the pipe through the seal member into the through hole of the rocker casing sidewall liquid-tight, electrical in rocker case in this pipe A harness connected to the component is disposed. Then, a seal member is fitted into a through hole formed in a tapered shape with a diameter reduced toward the inside of the rocker case, and the plate is fixed to the rocker case so as to cover the through hole from the outside of the rocker case. At this time, the seal member is pressed by the plate to reduce the diameter, and the space between the through hole and the seal member and between the seal member and the pipe are maintained in a liquid-tight state.
[0012]
In the harness mounting structure for an engine according to the second aspect of the present invention, 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.
[0013]
In the harness mounting structure for an engine according to the third aspect of the present invention, oil leakage from the inside of the pipe to the outside of the rocker case is prevented by providing a rubber cap on at least one of both ends of the pipe.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an engine harness mounting structure according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing the overall configuration of the engine, and FIG. It is typical sectional drawing which shows a part structure.
In FIG. 1, reference numeral 1 is an engine, 2 is a rocker case, 3 is an injector as an electrical component, and 4 is a harness connected to the injector 3. The injector 3 is disposed at the upper part of each cylinder of the engine 1, and the fuel is directly supplied from the injector 3 into the cylinder.
[0015]
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.
By the way, a through hole 5 is formed in the side wall 2a of the rocker case 2 as shown in FIG. 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. In addition, a harness 4 is disposed in the pipe 6 so that the harness 4 is disposed through the side wall 2 a of the rocker case 2.
[0016]
As shown in FIGS. 1 and 2, the pipe 6 is substantially perpendicular to the direction (horizontal direction in the drawing) along the side wall 2a on the inside of the rocker case 2 from the direction through the through hole 5 (vertical direction in the drawing). The harness 4 is formed in a bent shape, and by passing the harness 4 through such a pipe 6, the radius of curvature of the harness 4 in the vicinity of the through hole 5 can be reduced, and the harness mounting structure is excellent in space efficiency. It can be. Therefore, the harness 4 can be disposed along the side wall 2a of the rocker case 2 also in the vicinity of the through hole 5, and the harness 4 is also disposed in the vicinity of the interference 12 as shown in FIG. It can be done. In addition, as interference object 12, components, such as a timing gear and a rocker shaft, can be considered, for example.
[0017]
The pipe 6 is fixed to the side wall 2a by a clamp 10 in the rocker case 2, thereby restricting the movement of the pipe 6.
By the way, as shown in FIG. 2, the through-hole 5 is formed in a tapered shape having a diameter reduced toward the inside of the rocker case 2, and a bottom surface portion 5a is formed at a tip portion (near the inside of the rocker case 2). Is formed.
[0018]
The rubber seal 7 is formed in a tapered shape corresponding to the through hole 5 and is thicker than the depth of the through hole 5. The rubber seal 7 may be formed in a tapered shape having a diameter slightly larger than that of the through hole 5 in addition to such a shape.
The rubber seal 7 is fixed to the rocker case 2 using a plate 8 as shown in FIG. 2, and the rubber seal 7 is pressed against the plate 8 to be elastically deformed, thereby providing a sealing function. Has come to demonstrate.
[0019]
In other words, the plate 8 is attached to the rocker case 2 so as to cover the rubber seal 7 with the bolt 9, and as the bolt 9 is tightened, the rubber seal 7 is pressed against the plate 8 and the through hole 5. It comes to come in close contact with. 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 force pressing the rubber seal 7 acts in the radial direction, and the pipe 6 is tightened. The rubber seal 7 and the rocker case 2 and the rubber seal 7 and the pipe 6 are in close contact with each other. As a result, the liquid tightness between the through hole 5 and the pipe 6 is maintained, and leakage of engine oil or the like from the through hole 5 is prevented.
[0020]
As shown in FIG. 1, rubber caps 11 are attached to both ends of the pipe 6 (this rubber cap is omitted in FIG. 2), and the rubber cap 11 opens openings at both ends of the pipe 6. It is blocked. This prevents engine oil and the like from leaking out of the rocker case 2 through the inside of the pipe 6.
[0021]
Here, when the rubber cap 11 is attached to the end protruding from the inside of the rocker case 2 among the ends of the pipe 6, the engine oil in the rocker case 2 is removed from the gap between the pipe 6 and the harness 4. So that the engine oil does not leak between the pipe 6 and the harness 4. Further, when the rubber cap 11 is attached to the end protruding to the outside of the rocker case 2, even if the engine oil enters between the pipe 6 and the harness 4, the rubber cap 11 allows the outside of the engine oil. It is possible to prevent leakage.
[0022]
In the present embodiment, an example in which the rubber cap 11 is provided at both ends of the pipe 6 has been described. However, the rubber cap 11 is not necessarily provided at both ends of the pipe 6, and at least one of the both ends is provided. It may be provided on one side.
Since the harness mounting structure as one embodiment of the present invention is configured as described above, when the harness 4 is disposed in the rocker case 2, for example, the following procedure is performed.
[0023]
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.
Thereafter, the plate 8 is attached so as to cover the rubber seal 7 from the outside of the rocker case 2. At this time, when the bolt 9 for fixing the plate 8 is tightened, the rubber seal 7 is pressed against the plate 8 and pressed against the through hole 5, so that the space between the rubber seal 7 and the through hole 5 is kept fluid-tight. . Further, 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 against 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.
[0024]
Finally, the position of the pipe 6 is fixed using the clamp 10.
According to the harness mounting structure for an engine of the present invention, by arranging the harness 4 in the rocker case 2 as described above, the conventional connector (see FIGS. 3 and 4) is used. Also, a harness mounting structure with excellent space efficiency can be obtained.
[0025]
That is, in the structure using the conventional connector, the harness 4 is greatly bent in the vicinity of the connector, and thus a large space is required. However, according to the present invention, the pipe 6 formed at a substantially right angle is used. Thus, with the extremely simple configuration of passing the harness 4 through the pipe 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 connected to the rocker case 2 in the vicinity of the through hole 5. It can be disposed along the side wall 2a. Thereby, the space-saving harness mounting structure can be provided as compared with the conventional harness mounting structure.
[0026]
Further, since the harness 4 can be disposed in the vicinity of the interfering object 12, there is an advantage that the degree of freedom in layout and design of the components in the rocker case 2 is greatly improved, and in addition to the conventional connector. In addition, there is an advantage that the cost can be greatly reduced by a very simple configuration in which the harness 4 is passed through the pipe 6 formed at a substantially right angle.
[0027]
In addition, there is an advantage that the work of arranging the harness 4 itself becomes easy. That is, conventionally, 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 operator can It was necessary to put hands in the narrow space in 2 and connect the connectors, so workability was not good. On the other hand, in the harness mounting structure of the present invention, after the pipe 6 is passed through the through-hole 5, the bolt 9 is tightened to fix the plate 8, so that the work is facilitated.
[0028]
Further, since it is not necessary to secure a working space when connecting the connector in the rocker case 2, space saving can be achieved from this point of view.
Further, the through hole 5 is formed in a tapered shape having a diameter 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 changed to the through hole. By forming it thicker than the depth of 5, there is an effect that the space between the rubber seal 7 and the pipe 6 and the space between the rubber seal 7 and the through hole 5 are surely sealed. In other words, when the plate 8 is attached to the rocker case 2 and the bolt 9 is tightened, the rubber seal 7 is pressed against the plate 8 and is brought into close contact with the through hole 5, and the rubber seal 7 and the through hole 5 are securely sealed. At the same time, the diameter of the rubber seal 7 is reduced in the radial direction and the pipe 6 is tightened, whereby the gap between the rubber seal 7 and the pipe 6 is reliably sealed.
[0029]
Thus, there is an advantage that liquid tightness between the through hole 5 and the pipe 6 is maintained, and leakage of engine oil or the like from the through hole 5 can be prevented.
Further, by attaching the rubber cap 11 to the end portion of the pipe 6, it is possible to prevent engine oil or the like from leaking out of the rocker case 2 through the inside of the pipe 6, and the liquid tightness is improved. .
[0030]
The harness mounting structure for an engine 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]
【The invention's effect】
As described above in detail, according to the harness attachment structure for an engine of the present invention according to claim 1, as well as fitted to the pipe in a liquid tight manner through a sealing member into the through hole of the rocker casing side wall, in this pipe The harness connected to the electrical components in the rocker case is disposed, and the through hole is formed in a tapered shape with a diameter reduced toward the inside of the rocker case. There is an advantage that it can be surely sealed.
[0032]
According to the harness mounting structure for an engine of the present invention as set forth in claim 2 , the harness can be disposed in a small space, and a highly space-efficient harness mounting structure can be provided. In other words, by passing the harness through a pipe that is bent substantially at a right angle, the harness can be disposed in the vicinity of the through-hole without the harness being greatly bent, and the degree of freedom in design is greatly improved. There are advantages. Further, the simple configuration as described above has an advantage that the cost can be reduced as compared with the structure using the conventional connector, and the work of arranging the harness is facilitated.
According to the harness mounting structure for an engine of the present invention as set forth in claim 3, engine oil or the like can be prevented from leaking out of the rocker case through the inside of the pipe, and the liquid tightness is further improved. There is an advantage.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing the overall configuration of an engine harness mounting structure according to an embodiment of the present invention, as viewed from the top of the engine.
FIG. 2 is a schematic cross-sectional view showing a main configuration of an engine harness mounting structure as one embodiment of the present invention.
FIG. 3 is a schematic diagram showing an example of a conventional harness mounting structure for an engine.
FIG. 4 is a schematic view showing an example of a conventional harness mounting structure for an engine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 2 Rocker case 2a Side wall 3 Injector 4 as an electrical component 4 Harness 5 Through-hole 5a Bottom face part 6 Pipe 7 Rubber seal (seal member)
8 Plate 9 Bolt 10 Clamp 11 Rubber cap 12 Interference

Claims (3)

Rocker case,
A through hole formed in a tapered shape that is formed in a side wall of the rocker case and has a diameter reduced toward the inside of the rocker case ;
A pipe that is liquid-tightly inserted into the through-hole via a seal member;
A harness connected to the electrical components in the rocker case through the pipe ;
A plate attached to the rocker case so as to cover the through hole from the outside of the rocker case ;
The seal member is disposed in the through-hole from the outside of the rocker case;
When the plate is fixed to the rocker case, the seal member is pressed by the plate to reduce its diameter, and the space between the through hole and the seal member is held in a liquid-tight manner. <br> An engine harness mounting structure characterized by the above. The engine harness mounting structure according to claim 1 , wherein the 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 .   The engine harness mounting structure according to claim 1, wherein a rubber cap is attached to at least one of both ends of the pipe.

Images