JP2018053741A - Vehicle harness arrangement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle harness arrangement structure which can inhibit interference between a drive shaft and a harness while eliminating a need of significant modification of a shape of an engine.SOLUTION: In an engine room 100 of a vehicle which includes an engine 1 and a drive shaft 20 supported on a rear surface 1r of the engine 1 and extending in a lateral direction at the rear side of the engine 1, a harness 10 extending from a position below the drive shaft 20 to a position above the drive shaft 20 is arranged so as to extend from a position below a small diameter part 20b to a position above the small diameter part 20b through a space between the small diameter part 20b of the drive shaft 20 which has a small diameter and the rear surface 1r of the engine 1.SELECTED DRAWING: Figure 1

Description

  The present invention is provided in an engine room of a vehicle including an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine, and the drive is performed from a position below the drive shaft. The present invention relates to a harness wiring structure for a vehicle that extends to a position above a shaft.

  Conventionally, various harnesses connected to sensors or the like are routed around the engine.

  Further, in some vehicles in which a drive shaft is arranged on the side of the engine, a harness is routed between the engine and the drive shaft. For example, Patent Document 1 discloses that a harness extending from an oil level sensor attached to an oil pan is routed between an engine and a drive shaft.

  Here, when the harness is routed between the engine and the drive shaft in this way, the harness may interfere with the drive shaft.

  On the other hand, in Patent Document 1, a recess is provided on one side of the oil pan, and a step portion is formed on the rear surface of a portion of the engine body located above the recess. The harness is arranged so as to pass through the front portion of the part, and the harness passes through a position farther from the drive shaft and passes between the drive shaft and the engine.

JP 2008-163841 A

  In the configuration of Patent Document 1, a recess is provided on one side of the oil pan, and a step is formed on the engine body, whereby interference between the harness and the drive shaft is suppressed. Therefore, in this configuration, in order to avoid the interference, it is necessary to significantly change the shape of the engine determined by the engine performance.

  The present invention has been made in view of the above circumstances, and provides a vehicle harness routing structure that can suppress interference between a drive shaft and a harness while making no significant modification of the shape of the engine unnecessary. The purpose is to provide.

  In order to solve the above-mentioned problems, the present invention is provided in an engine room of a vehicle including an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine. A harness routing structure extending from a position below the drive shaft to a position above the drive shaft, wherein the harness extends between the smallest diameter portion of the drive shaft and the rear surface of the engine. A harness wiring structure for a vehicle is provided that is routed so as to extend from a position below the minimum diameter portion to a position above the minimum diameter portion (Claim 1). .

  According to this configuration, the harness passes through the drive shaft in the vertical direction at a portion between the minimum diameter portion of the drive shaft and the rear surface of the engine where the distance between the drive shaft and the rear surface of the engine is relatively long. Therefore, it is possible to suppress the interference between the harness and the drive shaft while making it unnecessary to significantly change the shape of the engine in order to pass the harness (for example, providing a recess in the engine).

  Further, the present invention is provided in an engine room of a vehicle including an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine, and is provided at a position below the drive shaft. A harness routing structure extending to a position above the drive shaft, wherein the drive shaft includes a large-diameter portion including a portion supported by the rear surface of the engine, and one side in the left-right direction from the large-diameter portion. A small diameter portion having a diameter smaller than that of the large diameter portion, and the harness passes between the small diameter portion and a rear surface of the engine and is located above the small diameter portion from a position below the small diameter portion. Provided is a harness wiring structure for a vehicle characterized in that the wiring is extended so as to extend to a position to be (Claim 2).

  According to this configuration, the separation distance between the rear surface of the engine and the rear surface of the engine is not a portion having a relatively large diameter, which is fixed to the rear surface of the engine, and the rear surface of the engine. In a relatively long portion, the harness is routed so as to pass vertically through the drive shaft. Therefore, it is possible to suppress the interference between the harness and the drive shaft while eliminating the need for significant modification of the shape of the engine in order to pass the harness.

  In the above configuration, the large-diameter portion of the drive shaft is disposed at a position closer to one side than the center of the rear surface of the engine in the left-right direction, and the small-diameter portion of the drive shaft extends from the large-diameter portion in the left-right direction. The harness is connected to a sensor provided at a position closer to the other side than the center of the rear surface of the engine in the left-right direction and below the drive shaft. After extending to one side in the left-right direction, it is preferable that the small diameter portion is routed so as to extend upward through a portion between the portion close to the large diameter portion and the rear surface of the engine. 3).

  According to this configuration, the length of the harness routed above the drive shaft can be shortened while suppressing interference between the harness and the drive shaft. Therefore, when the engine exhaust system is provided above the drive shaft, the heat damage applied to the harness can be reduced.

  The said structure WHEREIN: It is preferable that the diameter of the said small diameter part is set to the smallest value among the diameters of the said drive shaft (Claim 4).

  According to this structure, interference with a harness and a drive shaft can be suppressed more reliably.

  In the above-described configuration, a mount bracket that supports the drive shaft is disposed between the rear surface of the engine and the drive shaft, and between the mount bracket and the rear surface of the engine and above the drive shaft. A harness support member that extends in the left-right direction and can support the harness is disposed at a position at which the engine is supported, and the harness is supported by the harness support member so that the engine is positioned above the drive shaft. It is preferable that the cable is routed between the rear surface and the mount bracket so as to extend in the left-right direction (Claim 5).

  According to this configuration, the harness can be prevented from interfering with the mount bracket due to vibration or the like while the harness is routed between the mount bracket and the rear surface of the engine.

  In the above configuration, the mount bracket has an upper fixing portion that is fixed to the rear surface of the engine immediately above the harness support member, and the harness support member is spaced apart from the upper fixing portion of the mount bracket in the left-right direction. It is preferable that the engine is fixed to the rear surface of the engine by a fastening member at a position (Claim 6).

  According to this configuration, when the harness support member is attached to or removed from the rear surface of the engine, and the fastening member is screwed into or released from the rear surface of the engine, the harness support member is mounted on the rear surface of the engine. Rotation of the harness support member can be restricted by abutting against the fixed portion (upper fixed portion or a part of the engine that fixes the fixed portion). Therefore, it is possible to easily perform the attaching or removing operation of the harness support member.

  Further, the present invention is provided in an engine room of a vehicle including an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine, and is provided at a position below the drive shaft. A harness routing structure extending to a position above the drive shaft, wherein a mount bracket for supporting the drive shaft is disposed between a rear surface of the engine and the drive shaft, A large-diameter portion including a portion supported by the mount bracket, and a small-diameter portion extending from the large-diameter portion to one side in the left-right direction and having a smaller diameter than the large-diameter portion, and the harness includes the small-diameter portion. From the position below the part through the small diameter part and the rear surface of the engine from the central axis of the drive shaft. And a harness wiring for a vehicle, wherein the wiring harness extends so as to extend to the other side in the left-right direction after passing upward between the rear surface of the engine and the mounting bracket. A structure is provided (claim 7).

  Even with this configuration, it is possible to suppress the interference between the harness and the drive shaft while making it unnecessary to significantly change the shape of the engine in order to pass the harness.

  Specifically, at a position facing the central axis of the drive shaft, the front surface of the drive shaft is closest to the rear surface of the engine, and the distance between them is the smallest. On the other hand, in this configuration, the harness is routed so as to pass through the central axis in the small-diameter portion having a relatively small diameter, and is routed so as to extend toward the large-diameter portion after passing through the central axis. Has been. Therefore, the interference between the harness and the drive shaft can be ensured without changing the shape of the engine, and the interference between them can be suppressed.

  Moreover, in this configuration, the harness is routed so as to extend to the large-diameter portion side between the mount bracket that supports the drive shaft on the rear surface and the rear surface of the engine. That is, the mount bracket is interposed between the harness and the drive shaft. Therefore, the interference between the harness and the drive shaft can be more reliably suppressed.

  In the above configuration, the engine includes a cylinder block and an oil pan disposed below the cylinder block, a recess is formed on a rear surface of a lower end portion of the cylinder block, and the harness It is preferable that the cable is routed so as to pass through a position facing the recess.

  According to this configuration, the harness can be further separated from the drive shaft without greatly changing the shape of the engine, and these interferences can be more reliably suppressed.

  In the above configuration, the cylinder block has an upper block and a lower block provided below the upper block and fastened to the upper block, and the recess is fastened between the upper block and the lower block. It is preferable that it is a part which is located under a part and a tool is inserted when fastening the said blocks (Claim 9).

  In this way, it is not necessary to provide a separate recess for routing the harness, and the harness can be routed at a position further away from the drive shaft while making modification of the engine shape unnecessary.

  As described above, according to the harness wiring structure for a vehicle of the present invention, interference between the drive shaft and the harness can be suppressed without significantly modifying the shape of the engine.

1 is a schematic rear view around an engine to which a harness wiring structure for a vehicle according to a first embodiment of the present invention is applied. FIG. 2 is a schematic rear view of a state where a drive shaft and a mounting bracket are removed from the state shown in FIG. 1. FIG. 3 is a cross-sectional end view taken along line III-III in FIG. 1. It is a schematic rear view of the engine periphery to which the vehicle harness wiring structure according to the second embodiment of the present invention is applied. FIG. 5 is a schematic rear view of a state where the drive shaft and the mounting bracket are removed from the state shown in FIG. 4. FIG. 5 is a cross-sectional end view taken along line IV-IV in FIG. 4. It is the IIV-IIV sectional view taken on the line of FIG. It is a schematic rear view of the engine periphery to which the vehicle harness wiring structure according to the third embodiment of the present invention is applied. FIG. 9 is a schematic rear view of a state where the drive shaft and the mounting bracket are removed from the state shown in FIG. 8. FIG. 9 is an end view of a cut portion taken along line XX in FIG. 8. FIG. 9 is an end view of a cut portion taken along line XI-XI in FIG. 8.

(First embodiment)
FIG. 1 is a schematic rear view showing the periphery of an engine 1 to which the vehicle harness wiring structure according to the first embodiment of the present invention is applied. FIG. 2 is a schematic rear view showing a state in which the drive shaft 20 and the mount bracket 30 are removed from the state shown in FIG. FIG. 3 is an end view of a cut portion taken along line III-III in FIG.

  The engine 1 is disposed in an engine room 100 formed in the vehicle, and is used as a drive source for the vehicle. The engine 1 shown in FIG. 1 is an in-line four-cylinder engine formed so that four cylinders 1a are arranged in a row, and is placed horizontally in the engine room 100 (arranged so that the cylinders 2 are arranged in the vehicle width direction). ) FIG. 1 shows only the cylinder block 7 in which the cylinder 1a is formed and the oil pan 4 disposed below the cylinder block 7, and the illustration of other components such as other cylinder heads and exhaust passages is omitted. doing. Hereinafter, the vehicle width direction is referred to as the left-right direction, and the right and left in FIG. 1 are simply referred to as right and left, respectively.

  The cylinder block 7 includes an upper block 2 and a lower block 3 disposed below the upper block 2 and fastened to the upper block 2. The oil pan 4 is fastened to the lower block 3. In FIG. 1 and the like, reference numeral 4d denotes an oil pump for pumping oil in the oil pan 4 to each part of the engine book, and is fixed to the rear surface 7r of the cylinder block 7.

  A drive shaft 20 is disposed behind the engine 1 so as to extend in the left-right direction. The drive shaft 20 has a substantially cylindrical shape extending in the left-right direction as a whole.

  In this specification, the arrangement direction of the engine 1 and the drive shaft 20 is referred to as the front-rear direction, and the engine 1 side is described as the front side, and the drive shaft 20 side is described as the rear side. In addition, before and after this, it does not necessarily need to correspond with the front and back of a vehicle front-back direction.

  The drive shaft 20 is a member for transmitting the output of the engine 1 to a wheel, and is connected to a differential gear (not shown) and is connected to a wheel (not shown) at both left and right ends thereof.

  The drive shaft 20 includes a shaft main body 22 constituting a portion facing the rear surface 7r of the cylinder block 7 (the rear surface 1r of the engine 1), a portion 21 extending leftward from the shaft main body 22 and connected to a differential gear, and a shaft main body. 22 and a portion 23 that extends to the right side and is connected to the wheel.

  As shown in FIG. 1 and the like, the diameter of the shaft main body 22 changes in the left-right direction, and the shaft main body 22 is positioned on the right side of the left-right center and has a large diameter portion 20a having a large diameter and a large diameter portion 20a. The small-diameter portion 20b extends from the left end portion to the left side and has a smaller diameter than the large-diameter portion 20a. More specifically, of the portion of the drive shaft 20 that faces the rear surface 7r of the cylinder block 7, the portion from the position on the right side to the right end of the center in the left-right direction forms the large-diameter portion 20a. The left portion constitutes the small diameter portion 20b.

  The large diameter portion 20a includes a ball joint portion 22 and a supported portion 25 that extends to the left from the ball joint portion 22 and is fixed to the cylinder block 7 as will be described later. The diameter of the supported portion 25 is set to be larger than the diameter of the small diameter portion 20 b and smaller than the diameter of the ball joint portion 22.

  The diameter of the small diameter portion 20b is constant in the left-right direction. In the present embodiment, the diameter of the small diameter portion 20b is set to the smallest value among the diameters of the entire drive shaft 20, and constitutes the smallest diameter portion of the drive shaft 20 having the smallest diameter.

  The drive shaft 20 is supported on the rear surface 7 r of the cylinder block 7 via the mount bracket 30. More specifically, in the drive shaft 20, the supported portion 25 constituting the left portion of the large-diameter portion 20 a is supported on the rear surface 2 r of the upper block 2 and the rear surface 3 r of the lower block 3 via the mount bracket 30. The cylinder block 7 is supported.

  As shown in FIGS. 1 and 3, the mount bracket 30 has a main body portion 31 fastened to the rear surface 7 r of the cylinder block 7 and a pressing portion 32 fastened to the rear surface of the main body portion 31.

  The main body 31 of the mount bracket 30 has a shape extending from the lower portion of the rear surface 2r of the upper block 2 to the lower end portion of the rear surface 3r of the lower block 3, and is fixed to the rear surfaces 2r and 3r at the upper end portion and the lower end portion thereof. Yes. In the present embodiment, the main body portion 31 of the mount bracket 30 has a substantially isosceles triangular shape having the upper end as a vertex, and is fastened to the rear surfaces 2r and 3r at the three top portions.

  As shown in FIG. 3, a recess 31 g having a substantially semicircular cross section is formed on the rear surface of the main body 31 of the mount bracket 30.

  The pressing portion 32 of the mount bracket 30 is a plate-like member extending in the vertical direction, and is fastened to the rear surface of the mount bracket 30 at the upper end portion and the lower end portion thereof. A bulging portion 32g that bulges rearward is formed at the upper and lower intermediate portions of the mount bracket 30. The inner peripheral surface of the bulging portion 32g has a semicircular shape that is symmetrical with the inner peripheral surface of the concave portion 31g in the front-rear direction, and the pressing portion 32 is fixed to the main body portion 31 of the mount bracket 30. Thus, a space having a substantially circular cross section is formed between the bulging portion 32g and the concave portion 31g.

  The drive shaft 20 is supported by the mount bracket 30 by arranging the supported portion 25 in a space formed between the bulging portion 32g and the concave portion 31g. Specifically, with the front portion of the supported portion 25 being inserted into the recess 31g of the main body portion 31 of the mount bracket 30, the pressing portion 32 is attached to the main body portion 31 from the rear of the supported portion 25 and pressed. By fastening the part 32 and the main body part 31, the supported part 25 and thus the drive shaft 20 are sandwiched between the main body part 31 and the pressing part 32.

  As shown in FIG. 3, a cylindrical bearing 90 through which the supported portion 25 is inserted is disposed between the supported portion 25 and the mount bracket 30 (the bulging portion 32g and the recessed portion 31g). The mount bracket 30 rotatably supports the supported portion 25 and thus the drive shaft 20 via the bearing 90.

  An oil level sensor 5 for detecting the amount of oil stored in the oil pan 4 is attached to the bottom surface 4 a of the oil pan 4. In the present embodiment, an oil level sensor 5 is attached near the left end portion of the bottom surface 4 a of the oil pan 4.

  A harness 10 is connected to the oil level sensor 5. This harness 10 is connected to an ECU provided separately in the vehicle.

  Here, the ECU is arranged at a relatively upper position in the engine room 100, and the harness 10 is routed so as to extend upward from the oil level sensor 5 beyond the drive shaft 20.

  In the present embodiment, the harness 10 is supported by the first harness bracket 41, the second harness bracket 42, the third harness bracket 43 (harness support member), and the fourth harness bracket 44 so as to extend upward from the oil level sensor 5. Has been.

  As shown in FIG. 1, the first harness bracket 41 is fixed to the oil pan 4. The first harness bracket 41 is provided on the right side of the oil level sensor 5 and extends across the bottom surface 4 a and the side surface 4 b of the oil pan 4. Specifically, the first harness bracket 41 has a shape extending from the vicinity of the oil level sensor 5 to the right side and then extending upward in the vicinity of the left and right center of the bottom surface 4 a of the oil pan 4.

  The harness 10 is supported by the first harness bracket 41 so as to extend from the oil level sensor 5 to the right side substantially horizontally along the bottom surface 4a of the oil pan 4, and then upward in the vicinity of the left and right center of the oil pan 4. Arranged to head.

  The second harness bracket 42 is fixed to the lower block 3. The second harness bracket 42 is disposed above the first harness bracket 41 and supports the harness 10 extending upward from the first harness bracket 41 so as to extend further upward.

  Here, the second harness bracket 42 is a substantially central portion of the drive shaft 20 in the left-right direction and is opposed to a part of the small-diameter portion 20b, specifically, close to the large-diameter portion 20a in the small-diameter portion 20b. It is provided at a position facing the part. Therefore, the harness 10 is routed so as to extend in the up-down direction through between the portion of the small diameter portion 20b adjacent to the large diameter portion 20a and the rear surface of the engine body 1.

  In the present embodiment, the harness 10 is routed so as to pass between the small-diameter portion 20b and the rear surface of the engine body 1 until it reaches a position above the small-diameter portion 20b. The small diameter portion 20b passes through the drive shaft 20.

  Thus, in the present embodiment, the harness 10 extends from the left side of the bottom surface 4a of the oil pan 4 to the right side from the center of the left and right sides, and then upwards, toward the upper side, and the rear surface 7r of the small diameter portion 20a and the cylinder block 7 It is routed so as to extend to a position above the drive shaft 20.

  The third harness bracket 43 is fixed to the upper block 2. The third harness bracket 43 is disposed at a position above the drive shaft 20 and supports the harness 10 after passing through the drive shaft 20.

  The third harness bracket 43 is located on the upper right side of the second harness bracket 42 and extends in the vertical direction, and the second support portion 43b extends rightward from the upper end of the first support portion 43a. And a mounted portion 43c extending upward from the upper edge of the second support portion 43b.

  The first support portion 43 a is provided on the left side of the mount bracket 30 and close to the left edge of the main body portion 31 of the mount bracket 30, and the upper end of the mount bracket 30 from a position above the drive shaft 20. It extends to a position below.

  The second support portion 43 b extends between the mount bracket 30 and the rear surface 2 r of the upper block 2 to a position on the right side of the mount bracket 30 at a position above the drive shaft 20.

  In the present embodiment, as shown in FIG. 3, the second support portion 43 b extends in the left-right direction through a portion directly below the portion where the upper end portion of the mount bracket 30 and the rear surface 2 r of the upper block 2 are fastened. .

  Specifically, a mount mounting portion 2 a that protrudes rearward is formed on the rear surface 2 r of the upper block 2. On the other hand, an upper fixing portion 31a fixed to the mount mounting portion 2a is formed at the upper end portion of the main body portion 31 of the mount bracket 30. Bolt holes are formed in each of the mount mounting portion 2a and the upper fixing portion 31a, and a common bolt is screwed into these bolt holes so that the upper end portion of the mount bracket 30 and the rear surface 2r of the upper block 2 are connected. It is concluded. And the 2nd support part 43b is arrange | positioned directly under the mount attachment part 2a.

  By being supported by the second harness bracket 43 configured in this way, the harness 10 extends obliquely upward to the right toward the lower end of the first support portion 43a after being pulled out above the drive shaft 20, and thereafter , Extending upward at a position close to the left edge of the main body 31 of the mount bracket 30, and then passing to the right side of the mount bracket 30 through the space between the mount bracket 30 and the rear surface 2 r of the upper block 2. It is routed to extend. In this embodiment, as shown in FIG. 1, the harness 10 is routed between the second harness bracket 42 and the third harness bracket 43 in a state where the harness 10 is bent by a predetermined amount.

  The attached portion 43 c of the third harness bracket 43 is a portion fixed to the upper block 2. The attached portion 43c of the third harness bracket 43 is disposed at a position spaced to the right side from the mount bracket 30 and is fixed to the upper block 2 at this position. In the example shown in FIG. 1, the attached portion 43 c of the third harness bracket 43 is arranged to extend in the vertical direction at a position close to the right edge of the main body portion 31 of the mount bracket 30.

  The attached portion 43c of the third harness bracket 43 is fastened to the rear surface 2r of the upper block 2 by a bolt (fastening member) 43d, whereby the third harness bracket 43 is fixed to the upper block 2. Specifically, a through hole penetrating the front and back is formed at the upper end of the attachment portion 43c of the third harness bracket 43, and a bolt facing a portion of the rear surface 2r of the upper block 2 facing the through hole is formed. A hole is formed. The third harness bracket 43 is fixed to the upper block 2 by being screwed into the bolt hole in a state where the bolt 43d is inserted through the through hole.

  Here, as described above, the second support portion 43b extends in the left-right direction through directly below the mount mounting portion 2a. Therefore, the mount attaching portion 2a can be functioned as a detent for the third harness bracket 43, and the work of fixing the third harness bracket 43 to the upper block 2 can be easily performed.

  Specifically, when the fixing is performed using the right-hand bolt 43d, the bolt 43d is inserted into the through-hole of the mounted portion 43c of the third harness bracket 43 and the bolt hole of the upper block 2 and rotated clockwise. At this time, if the third harness bracket 43 also rotates together, it is difficult to screw the bolt 43d into the bolt hole. On the other hand, in this embodiment, even if the 3rd harness bracket 43 tries to rotate, the rotation is controlled by contact | abutting with the mount attaching part 2a. Therefore, the screwing operation of the bolt 43d can be easily performed. When the bolt 43d is a left-hand thread, the mount mounting portion 2a can function as a detent for the third harness bracket 43 when the screw 43d is released, and the third harness bracket 43 is connected to the upper block. The operation of detaching from 2 can be easily performed.

  The fourth harness bracket 44 is provided on the right side of the third harness bracket 43. In the present embodiment, the fourth harness bracket 44 is fixed near the right end portion of the upper block 2. The fourth harness bracket 44 supports the harness 10 diagonally to the right of the right end of the second support portion 43b of the third harness bracket 43, and the harness that has passed through the third harness bracket 43 is diagonally upward to the right. It is routed to extend.

  The fourth harness bracket 44 also supports this harness 10, that is, the harness 91 other than the harness 10 connected to the oil level sensor 5, and these harnesses 10 and 91 are gathered together in the fourth harness bracket 44 and are connected to the fourth harness. It is routed so as to extend upward from the bracket 44.

  As described above, in the first embodiment, the harness 10 has a diameter larger than that of the large-diameter portion 20a including the supported portion 25 and the ball joint portion 22 in the portion of the drive shaft 20 facing the rear surface 7r of the cylinder block 7. Is routed so as to cross the drive shaft 20 through the space between the rear surface 7r of the cylinder block 7 and the portion of the drive shaft 20 where the position of the front end of the small diameter portion 20a is located on the rear side. ing. Therefore, the harness 10 is connected to the drive shaft 20 without significantly changing the shape of the cylinder block 7 or the oil pan 4, that is, without forming a portion for routing the harness 10 in the cylinder block 7 or the oil pan 4. This can be passed at a position further away from the head, and interference between the harness 10 and the drive shaft 20 can be suppressed.

  In particular, in the first embodiment, the small diameter portion 20a is the smallest diameter portion of the drive shaft 20, and the interference can be more reliably suppressed.

  Further, in the first embodiment, the harness 10 extends from the oil level sensor 5 provided at the left end of the bottom surface 4a of the oil pan 4 to the right along the bottom surface 4a of the oil pan 4 in the horizontal direction, It extends upward and is routed so as to extend beyond the drive shaft 20 at a position close to the large diameter portion 20b in the small diameter portion 20a, and then further to the right side, and above the drive shaft 20 in the harness 10. The length of the part that is routed to is kept short. Therefore, the heat damage applied to the harness 10 from each member of the exhaust system of the engine 1 disposed above the drive shaft 20 can be suppressed.

  Specifically, an exhaust manifold, an exhaust passage, and the like are disposed in a portion above the upper block 2 and above the drive shaft 20. Therefore, if the distance that the harness 10 passes over the drive shaft 20 is long, the harness 10 is easily damaged by the radiant heat from these high-temperature exhaust passages and the like. In contrast, in the first embodiment, since the harness 10 is extended to the right side at a position below the drive shaft 20 and away from the exhaust passage or the like, the harness 10 is extended to the left side of the engine 1 in the left-right direction. While being routed from the portion to the vicinity of the right end portion, the heat damage applied to the harness 10 can be kept small.

(Second embodiment)
Next, a harness wiring structure for a vehicle according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a schematic rear view showing the periphery of the engine 1 to which the harness wiring structure of the vehicle is applied to the second embodiment. FIG. 5 is a schematic rear view showing a state in which the drive shaft 20 and the mount bracket 30 are removed from the state shown in FIG. FIG. 6 is a cutaway end view taken along the line IV-IV in FIG. 1. 7 is a cross-sectional view taken along line VII-VII in FIG. However, a part of the illustration is omitted in FIG. In these FIGS. 4 to 7 and the description of the second embodiment, the same reference numerals as those in the first embodiment are used for elements having the same configuration as in the first embodiment.

  In the second embodiment and the first embodiment, the structure of the third harness bracket 143 is mainly different, and the structure of the lower portion of the rear surface of the engine 1 is mainly different. Hereinafter, only the differences will be described in detail, and detailed descriptions of other structures that are the same as those of the first embodiment will be omitted.

  Specifically, also in the second embodiment, the drive shaft 20 is composed of a supported portion 25 supported by the mount bracket 30 and a ball joint portion 22 adjacent to the right side thereof, and the rear surface of the engine body 1. A large-diameter portion 20b that opposes the right-side portion of the drive shaft 20, and a small-diameter portion 20a that extends leftward from the large-diameter portion 20b and has a smaller diameter than the large-diameter portion 20a. . The oil level sensor 5 is provided at the left end portion of the bottom surface 4 a of the oil pan 4, and the harness 10 is supported by the first to fourth harness brackets 41 to 44. The harness 10 extends rightward from the oil level sensor 5 along the bottom surface 4a of the oil pan 4 and then moves upward, passes through the drive shaft 20 at a position close to the large diameter portion 20b in the small diameter portion 20a, Thereafter, it passes between the mount bracket 30 and the rear surface 7r of the cylinder block 7 and extends to the vicinity of the right end of the engine 1.

  By being configured in this manner, also in the second embodiment, interference between the harness 10 and the drive shaft 20 can be suppressed while requiring no significant modification of the shape of the cylinder block 7 or the oil pan 4. Moreover, the heat damage applied to the harness 10 can be suppressed small.

  Also in the second embodiment, the third harness bracket 143 has the mount bracket 30 and the upper block at a position above the drive shaft 20 and below the mount mounting portion 2a, as in the first embodiment. 2 has a second support portion 143b extending in the left-right direction through the rear surface 2r.

  On the other hand, in the second embodiment, unlike the first embodiment, the first support portion 143a of the third harness bracket 143 extends obliquely downward to the left from the left end of the second support portion 143b, and the first support portion 143a. A mounted portion 143c fixed to the rear surface 2r of the upper block 2 extends upward from the upper edge of the upper block 2. The attached portion 143c is fastened to the rear surface 7r of the cylinder block 7 by a bolt 143d at a position separated from the mount bracket 30 on the left side.

  Thus, in the second embodiment, the third harness bracket 143 is fixed to the rear surface 7r of the cylinder block 7 on the left side of the mount bracket 30. Therefore, when the third harness bracket 143 is attached to the rear surface 7r of the cylinder block 7 using the left-hand bolt 143d, the mount attachment portion 2a can function as a detent for the third harness bracket 143. When the bolt 143d is used, the work of removing the third harness bracket 143 from the upper block 2 by causing the mount mounting portion 2a to function as a detent for the third harness bracket 143 when releasing the screwing of the bolt 143d is facilitated. It can be carried out.

  As shown in FIG. 4, in the second embodiment, the harness 10 is routed between the second harness bracket 42 and the third harness bracket 143 with almost no bending.

  Moreover, in 2nd Embodiment, as shown in FIG. 6 etc., in the center part of the left-right direction of the lower end part of the rear surface 7r of the cylinder block 7, ie, the center part of the left-right direction of the lower end part of the rear surface 3r of the lower block 3 A recess 103 is formed.

  The recess 103 is located below the fastening portion between the upper block 2 and the lower block 3, and is a recess for inserting a tool when fastening them.

  Specifically, as shown in FIGS. 5 and 7, fastening portions 112 and 113 bulging rearward are respectively formed in the left and right central portions of the lower end portion of the rear surface 2 r of the upper block 2 and the portions facing the lower central portion. Is provided. Bolt holes 112a and 113a are formed in the fastening portions 112 and 113 so as to penetrate them in the vertical direction. The upper block 2 and the lower block 3 are fastened by screwing a common bolt 118 into these bolt holes 112a and 113a. Here, this fastening operation is performed using the tool 119. At this time, as shown by a broken line in FIG. 7, the tool 119 is inserted into the recess 103 from the lower block 3 side and set to the bolt 118. .

  And in this 2nd Embodiment, the harness 10 is routed so that the part facing the said recessed part 103 may be passed. Specifically, as shown in FIGS. 5 and 7, the harness 10 extends upward from the first harness bracket 41 and then passes through a position slightly ahead of the opening surface on the rear side of the recess 103. In other words, the cable is routed toward the second harness bracket 42 while slightly entering the recess 103.

  Therefore, in the second embodiment, the harness 10 is connected to the drive shaft 20 by using the recess 103 for inserting a tool for fastening the upper block 2 and the lower block 3 without changing the shape of the engine 1. They can be further separated, and these interferences can be more reliably suppressed.

  In the above description, the case where the harness 10 is opposed to the recess 103 using the recess 103 formed to insert the tool 119 has been described. However, the harness 10 is separated from the recess 103 for inserting the tool 110. A recess for separating the drive shaft 20 from the drive shaft 20 may be formed. Even in this case, since the concave portion 103 is formed in the central portion in the left-right direction of the lower end portion of the rear surface 3r of the lower block 3 and does not significantly affect the overall shape of the lower block 3, Interference between the harness 10 and the drive shaft 20 can be suppressed while requiring no significant modification of the shape.

(Third embodiment)
Next, a harness wiring structure for a vehicle according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a schematic rear view showing the periphery of the engine 1 to which the harness wiring structure of the vehicle is applied to the third embodiment. FIG. 9 is a schematic rear view showing a state where the drive shaft 20 and the mount bracket 330 are removed from the state shown in FIG. FIG. 10 is an end view of a cut portion taken along line XX of FIG. 11 is a cross-sectional end view taken along line XI-XI in FIG. In FIGS. 8 to 11 and the following description of the third embodiment, the same reference numerals as those in the first embodiment are used for elements having the same configuration as in the first embodiment.

  The vehicle harness routing structure according to the third embodiment is different from the first embodiment in the structure of the mount bracket 330 and when passing between the drive shaft 20 and the rear surface 7r of the cylinder block 7. The wiring structure of the harness 10 is different. Hereinafter, only the differences will be described in detail, and detailed descriptions of other structures that are the same as those of the first embodiment will be omitted.

  As described above, in the first embodiment, the main body portion 31 of the mount bracket 30 has a substantially isosceles triangular shape with the upper end as the apex, whereas in the third embodiment, the main body portion of the mount bracket 330. 331 has a substantially square shape. The entire body portion 331 of the mount bracket 330 extends from the position on the left side of the right end of the small diameter portion 20a to the position on the right side of the left end of the ball joint portion 22 in the left-right direction. The main body 331 of the mount bracket 330 is fixed to the rear surface 7r of the cylinder block 7 at its four corners.

  Also in the third embodiment, as in the first embodiment, the harness 10 extends substantially horizontally from the oil level sensor 5 along the bottom surface 4a of the oil pan 4 to the right side, and then the vicinity of the left and right center of the oil pan 4 And is introduced into a portion between the vicinity of the right end of the small diameter portion 20a (a portion of the small diameter portion 20a adjacent to the large diameter portion 20a) and the rear surface 7r of the cylinder block 7.

  However, in the third embodiment, the harness 10 is routed above the center axis of the drive shaft 20 between the vicinity of the right end of the small diameter portion 20a and the rear surface 7r of the cylinder block 7, and then from the drive shaft 20 Also, it is bent rightward without extending upward, and is introduced into a portion between the mount bracket 330 and the rear surface 7r of the cylinder block 7 after passing between the small diameter portion 20a and the rear surface 7r of the cylinder block 7. In the example shown in FIG. 8 and the like, the harness 10 extends to the right along the upper edge of the small diameter portion 20a and is introduced between the right edge of the mount bracket 330 and the rear surface 7r of the cylinder block 7.

  The harness 10 crosses the portion between the mount bracket 330 and the rear surface 7r of the cylinder block 7 in the left-right direction, passes from the right edge of the mount bracket 330 to the right side, and then extends further to the right, It extends upward toward the harness bracket 43.

  In the example shown in FIG. 8 and the like, the harness 10 is pulled out to the right from the right edge of the mount bracket 330 and then extends to the right through the ball joint portion 22 and the rear surface of the engine body 1. The direction is changed upward near the right end.

  Thus, in the third embodiment, the harness 10 is routed in the small diameter portion 22 so as to extend upward from the central axis X1 of the drive shaft 20, and extends to the right at a position above the central axis X1. And is routed so as to pass through the front of the large-diameter portion 20. Therefore, also in 3rd Embodiment, interference with the harness 10 and the drive shaft 20 can be suppressed, without changing the shape of the cylinder block 7 or the oil pan 4 significantly. That is, the drive shaft 20 bulges forward most at the height position of the central axis X1, but since the diameter of the small diameter portion 20 is small, the forward bulge amount is kept small. Therefore, if the harness 10 is routed so as to extend above the central axis X1 of the drive shaft 20 in the small diameter portion 22 and crosses the central axis X1 in the small diameter portion 22 as described above, the harness 10 has a large diameter. Compared to the case where the center 20 crosses the central axis X1 in the portion 20, the distance between the harness 10 and the drive shaft 20 can be made longer, and these interferences can be suppressed.

  However, the harness 10 is not routed above the drive shaft 20 in the small-diameter portion 22 as described above, but extends to above the central axis X1 as described above, and then the large-diameter portion 22 and the rear surface 7r of the cylinder block 7 When the harness 10 is routed in the left-right direction (right side in this embodiment) so as to pass through the portion in between, the distance between the large-diameter portion 22 and the harness 10 tends to be short, and the harness 10 vibrates. These may interfere with each other. On the other hand, the harness 10 passes between the mount bracket 330 and the rear surface 7r of the cylinder block 7 in a portion of the large diameter portion 20 that faces the supported portion 25 and the left end portion of the ball joint portion 22. Has been routed to. In particular, in the third embodiment, the mount bracket 330 is configured to extend from the vicinity of the right end portion of the small-diameter portion 20 to a position on the right side of the left end of the ball joint portion 22, and the harness 10 is mounted over a longer distance. It is routed so as to pass between 330 and the rear surface 7r of the cylinder block 7. Therefore, interference between the harness 10 and the large-diameter portion 22 can be suppressed while the harness 10 is routed so as to pass in front of the large-diameter portion 20a.

  In the third embodiment as well, a harness bracket 343 for supporting the harness 10 is provided between the mount bracket 330 and the rear surface 3r of the lower block 3. However, the harness bracket 343 does not have a portion extending in the left-right direction unlike the third harness bracket 43 of the first embodiment, and simply supports a part of the harness 10 on the rear surface 3r of the lower block 3. ing.

(Other variations)
In the first to third embodiments, the oil level sensor 5 to which the harness 10 is connected is provided at the left end portion of the bottom surface 4a of the oil pan 4, and the harness 10 is positioned substantially horizontally from the oil level sensor 5 on the right side. However, the position of the oil level sensor 5 and the wiring structure of the harness 10 below the drive shaft 20 are not limited to this. However, as described above, if the harness 10 is routed further in the left-right direction below the drive shaft 20, the length of the harness 10 disposed above the drive shaft 20 is shortened to the harness 10. The applied heat damage can be reduced.

  Moreover, in the said 1st-3rd embodiment, although the said demonstrated the case where the harness 10 was connected to the oil level sensor 5, the harness 10 may be connected to another sensor.

  Moreover, the position of the small diameter part 20a and the large diameter part 20b is not restricted to the above.

  In the first to third embodiments, the case where the diameter of the small-diameter portion 20a is set to be the smallest among the drive shafts 20 has been described above, but the diameter of the small-diameter portion 20a may be smaller than that of the large-diameter portion 20b. The diameter may be set larger than the minimum diameter.

  In the first and second embodiments, the harness 10 may be routed so as not to pass through the rear surfaces of the mount bracket 30 and the rear surface 7r of the cylinder block 7.

  Moreover, in each embodiment, a harness bracket is omissible.

1 Engine 2 Upper block 3 Lower block 4 Oil pan 5 Oil level sensor (sensor)
7 Cylinder block 10 Harness 20 Drive shaft 20a Small diameter part (minimum diameter part)
20b Large-diameter portion 30 Mount bracket (first embodiment)
43 Third harness bracket (harness support member)
43d bolt (fastening member)
103 recessed portion 330 mount bracket (third embodiment)

Claims (9)

Provided in an engine room of a vehicle having an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine, and is located above the drive shaft from a position below the drive shaft. A harness routing structure extending to the position of
The harness passes between the smallest diameter portion of the drive shaft having the smallest diameter and the rear surface of the engine, and extends from a position below the smallest diameter portion to a position above the smallest diameter portion. The harness wiring structure of the vehicle characterized by being wired in. Provided in an engine room of a vehicle having an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine, and is located above the drive shaft from a position below the drive shaft. A harness routing structure extending to the position of
The drive shaft includes a large-diameter portion including a portion supported by the rear surface of the engine, and a small-diameter portion extending from the large-diameter portion to one side in the left-right direction and having a smaller diameter than the large-diameter portion,
The harness is routed so as to extend from a position below the small diameter portion to a position above the small diameter portion through between the small diameter portion and a rear surface of the engine. Harness wiring structure. In the vehicle harness wiring structure according to claim 2,
The large-diameter portion of the drive shaft is disposed at a position closer to one side than the center of the rear surface of the engine in the left-right direction,
The small diameter portion of the drive shaft extends from the large diameter portion to the other side in the left-right direction,
The harness is connected to a sensor provided at a position closer to the other side than the center of the rear surface of the engine in the left-right direction and below the drive shaft, and extends from the sensor to one side in the left-right direction. A harness routing structure for a vehicle, wherein the harness routing structure is configured to extend upward through a portion of the small diameter portion adjacent to the large diameter portion and a rear surface of the engine. In the harness wiring structure of the vehicle according to claim 2 or 3,
The harness routing structure for a vehicle, wherein the diameter of the small diameter portion is set to the smallest value among the diameters of the drive shaft. In the harness wiring structure of the vehicle in any one of Claims 1-4,
A mounting bracket that supports the drive shaft is disposed between the rear surface of the engine and the drive shaft,
A harness support member that extends in the left-right direction and is capable of supporting the harness is disposed between the mount bracket and the rear surface of the engine and above the drive shaft.
The harness is routed so as to extend in the left-right direction between the rear surface of the engine and the mount bracket at a position above the drive shaft by being supported by the harness support member. A harness wiring structure for vehicles. In the harness wiring structure of the vehicle according to claim 5,
The mount bracket has an upper fixing portion fixed to the rear surface of the engine immediately above the harness support member,
The harness wiring structure for a vehicle, wherein the harness supporting member is fixed to a rear surface of the engine with a fastening member at a position spaced in a left-right direction from an upper fixing portion of the mount bracket. Provided in an engine room of a vehicle having an engine and a drive shaft that is supported on the rear surface of the engine and extends in the left-right direction behind the engine, and is located above the drive shaft from a position below the drive shaft. A harness routing structure extending to the position of
A mounting bracket that supports the drive shaft is disposed between the rear surface of the engine and the drive shaft,
The drive shaft includes a large-diameter portion including a portion supported by the mount bracket, and a small-diameter portion extending from the large-diameter portion to one side in the left-right direction and having a smaller diameter than the large-diameter portion,
The harness extends upward from a position below the small diameter portion to a position above the central axis of the drive shaft through the small diameter portion and the rear surface of the engine, and then the rear surface of the engine. A harness routing structure for a vehicle, wherein the harness routing structure extends between the mounting bracket and the other side in the left-right direction. In the harness wiring structure of the vehicle in any one of Claims 1-7,
The engine has a cylinder block and an oil pan disposed below the cylinder block,
A recess is formed on the rear surface of the lower end of the cylinder block,
A harness routing structure for a vehicle, wherein the harness is routed so as to pass through a position facing the recess. In the harness wiring structure of the vehicle according to claim 8,
The cylinder block has an upper block and a lower block provided below the upper block and fastened to the upper block.
The vehicle harness wiring structure according to claim 1, wherein the recess is a portion that is positioned below a fastening portion between the upper block and the lower block and into which a tool is inserted when fastening the blocks.

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