JP2006042522A - Clamping structure of wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamping structure of a wire harness that improves the accuracy of wiring position and that surely prevents contact of a rotating body with the wire harness. <P>SOLUTION: The clamping structure of the wire harness is provided with a timing chain cover 21 having a plurality of clamp bases 22; a crank shaft pulley 31, that is adjacent to the timing chain cover 21 and that rotates while exchanging torque with a crank shaft; and resin clamps 61 that are mounted on each of a plurality of the clamp bases 22 to fix the wire harness 57. A plurality of the clamp bases 22 are formed integrally with the timing chain cover 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention generally relates to a clamp structure for a wire harness, and more particularly to a clamp structure for a wire harness that is arranged near a rotating body such as a pulley.

  Regarding a conventional wire harness clamp structure, for example, Japanese Patent Application Laid-Open No. 10-196615 discloses a wire harness attachment device for reducing the labor and cost of the attachment process and preventing the rotation of the clip. Is disclosed (Patent Document 1). The wire harness attachment device disclosed in Patent Literature 1 includes a thin plate-like holding member attached to an axle housing of an automobile, and a plurality of clips attached to the holding member at intervals. The wire harness is fixed along the surface of the automobile axle housing by the clip. Separately, Patent Document 1 discloses an attachment structure for fastening a wire harness to a bolt welded to an axle housing.

Japanese Patent Laid-Open No. 2002-165341 discloses a wire harness attachment structure that prevents erroneous attachment when attaching a wire harness with a clip (Patent Document 2). The wire harness attachment structure disclosed in Patent Document 2 includes an alternator tab race attached to the alternator, and a clip attached to the bracket portion of the alternator tab race and supporting the wire harness.
Japanese Patent Laid-Open No. 10-196615 JP 2002-165341 A

  In the wire harness clamp structure disclosed in the above-mentioned patent document, a clip member for directly fixing the wire harness and a member for attaching the clip member to a member for holding the wire harness are provided separately. . In this case, the number of parts increases, causing problems such as an increase in parts cost and an increase in the number of mounting steps.

  Moreover, when routing a wire harness along the surface of a casing, a bracket may be fastened together with the bolts for fastening a casing, and the clip member for fixing a wire harness to the bracket may be provided. In this case, in addition to the above-mentioned problem, since the bracket is rotated when the bolt is tightened, the fixing position of the bracket varies.

  At this time, if the path of the wire harness is positioned in the vicinity of the pulley of the internal combustion engine and the belt hung on the pulley, there is a possibility that the wire harness may come into contact with the rotating pulley or the driving belt due to variations in the fixing position of the bracket. Moreover, in order to eliminate such a contact, the method of making the path | route which wraps a wire harness roundabout, or fixing a wire harness and a clip member with high precision is also considered. However, any method requires a strict inspection system, which leads to an increase in manufacturing cost.

  Accordingly, an object of the present invention is to solve the above-described problems, and to provide a wire harness clamp structure that improves the positional accuracy of routing and reliably prevents contact between the rotating body and the wire harness. .

  A clamp structure for a wire harness according to the present invention includes a casing of a rotating device having a plurality of attachment portions, a rotating body that is adjacent to the casing and rotates while exchanging rotational force with the rotating device, and a plurality of rotating bodies. A clip member that is attached to each of the attachment portions and fixes the wire harness. The plurality of attachment portions are formed integrally with the casing. In addition, that the some attachment part is integrally formed in a casing means that the some attachment part is one with respect to a casing and has the relationship which cannot be divided.

  According to the clamp structure of the wire harness configured as described above, the plurality of attachment portions are formed integrally with the casing. Therefore, the clip member is directly attached to the casing without using a member provided separately from the casing. ,It is attached. For this reason, the positional accuracy of the wire harness does not deteriorate due to an attachment error of the separately provided member to the casing or deformation of the member. Moreover, since the attachment part is provided with two or more, a wire harness can be reliably fixed along a desired path | route. For these reasons, the wire harness can be accurately positioned at a position that does not contact the rotating body adjacent to the casing. Further, since the clip member is directly attached to the attachment portion of the casing, it is possible to reduce the component cost and the manufacturing cost.

  The rotating body is any one of a crankshaft pulley, an alternator pulley, a water pump pulley, a power steering pulley, and an air conditioner compressor pulley. According to the clamp structure of the wire harness configured as described above, it is possible to prevent these pulleys and the belts hung on the pulleys from coming into contact with the wire harness.

  Preferably, holes are formed in each of the plurality of attachment portions. The clip member is attached to the plurality of attachment portions by being inserted into the hole. According to the clamp structure of the wire harness comprised in this way, a clip member can be easily and reliably fixed to the attachment part of a casing. Thereby, while improving the reliability of a clamp structure, the workability | operativity at the time of attachment of a clip member can be improved.

  Preferably, the hole is a long hole having a long diameter. The major axis extends along a direction away from the rotating body. According to the clamp structure of the wire harness comprised in this way, the attachment position of the clip member with respect to a casing can be adjusted in the direction away from a rotary body. Thereby, it can prevent more reliably that a rotary body and a wire harness contact.

  As described above, according to the present invention, it is possible to provide a clamp structure for a wire harness that improves the positional accuracy of routing and reliably prevents contact between the rotating body and the wire harness.

  Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is an exploded view showing an engine in which a wire harness clamp structure according to Embodiment 1 of the present invention is used. FIG. 2 is a front view showing the engine as viewed from an arrow II in FIG. In FIG. 1, some of the parts constituting the engine are omitted, and in FIG. 2, the parts omitted in FIG. 1 are also drawn.

  Referring to FIG. 1, engine 10 includes a cylinder block 15 and a cylinder head 17 that are fixed to each other. A crankshaft 12 and a camshaft 11 protrude from the front surfaces of the cylinder block 15 and the cylinder head 17, respectively. A crank sprocket 14 and a cam sprocket 18 are provided on the crankshaft 12 and the camshaft 11, respectively, and a timing chain 13 is hung between these sprockets. With such a configuration, the rotational force output from the crankshaft 12 is transmitted to the camshaft 11 via the timing chain 13.

  A timing chain cover 21 made of, for example, an aluminum alloy is attached to the front surfaces of the cylinder block 15 and the cylinder head 17 so as to cover the timing chain 13. The timing chain cover 21 has an opening 21h through which the crankshaft 12 is inserted in a state where the oil pump seal 33 is incorporated. A crankshaft pulley 31 is attached to the crankshaft 12 protruding from the opening 21h.

  The timing chain cover 21 is formed with a water pump mounting seat 21c to which the water pump gasket 35 and the water pump 34 are sequentially attached. A water pump pulley 32 is attached to the shaft of the water pump 34, and the water pump pulley 32 rotates to forcibly circulate cooling water from the water pump 34 to each part of the engine 10.

  1 and 2, an air conditioner compressor pulley 38, an alternator pulley 40, and a power steering pump (hereinafter also referred to as P / S pump) pulley 39 are further provided on the front surface of the engine 10.

  The air conditioner compressor pulley 38 is connected to a shaft of an air conditioner compressor (not shown), and the refrigerant gas is sucked, compressed, and discharged as the air conditioner compressor pulley 38 rotates. The alternator pulley 40 is connected to an alternator shaft (not shown), and power is generated by the rotation of the alternator pulley 40. The P / S pump pulley 39 is connected to a shaft of a P / S pump (not shown). When the P / S pump pulley 39 rotates, steering assist torque is generated and the steering operation force is reduced.

  An auxiliary machine drive belt 41 is hung between the crankshaft pulley 31, the air conditioner compressor pulley 38, the water pump pulley 32 and the alternator pulley 40. With such a configuration, the rotational force output from the crankshaft 12 is transmitted to the air conditioner compressor pulley 38, the water pump pulley 32, and the alternator pulley 40 via the accessory driving belt 41, and together with the crankshaft pulley 31, these torques are transmitted. The pulley rotates.

  A P / S pump drive belt 42 is hung between the crankshaft pulley 31 and the P / S pump pulley 39. With such a configuration, the rotational force output from the crankshaft 12 is transmitted to the P / S pump pulley 39 via the P / S pump drive belt 42, and the P / S pump pulley 39 rotates together with the crankshaft pulley 31. .

  FIG. 3 is an enlarged front view showing a position where the crankshaft pulley and the air conditioner compressor pulley in FIG. 2 are provided. Referring to FIG. 3, the timing chain cover 21 includes a cover portion 23 that covers the timing chain 13 and has a surface 23 a, and a plurality of clamp bases 22 that protrude from the peripheral edge of the surface 23 a. For example, when the timing chain cover 21 is made of an aluminum alloy, both the cover portion 23 and the clamp base 22 are made of an aluminum alloy. When the timing chain cover 21 is formed from cast iron or sheet metal, both the cover portion 23 and the clamp base 22 are formed from cast iron or sheet metal. That is, the clamp base 22 is formed integrally with the timing chain cover 21.

  The timing chain cover 21 is fixed to the cylinder block 15 with bolts 25 fastened to the cover portion 23. A crankshaft pulley 31 is located immediately above the surface 23a. The clamp base 22 is provided at a position shifted from directly below the crankshaft pulley 31. The clamp base 22 is formed so as to extend from the peripheral edge of the surface 23 a toward the radial direction of the crankshaft pulley 31. The clamp base 22 is provided at a plurality of locations spaced in the circumferential direction of the crankshaft pulley 31.

  On the front surface of the cylinder block 15, a level sensor wire harness 57 (hereinafter simply referred to as a wire) passes between the crankshaft pulley 31 and the air conditioner compressor pulley 38 and between the crankshaft pulley 31 and the engine mounting jig 59. (Also referred to as a harness 57). One end 57 m of the wire harness 57 is connected to the main wire harness 56 of the engine 10, and the other end 57 n of the wire harness 57 is connected to the oil level sensor 58.

  A resin clamp 61 is attached to each of the plurality of clamp bases 22. A plurality of positions of the wire harness 57 are fixed at predetermined positions on the front surface of the cylinder block 15 by the resin clamp 61. The wire harness 57 is positioned at a position separated from the outer peripheral surface of the crankshaft pulley 31 by a predetermined distance and not in contact with the crankshaft pulley 31.

  FIG. 4 is a cross-sectional view of the timing chain cover along the line IV-IV in FIG. FIG. 5 is a bottom view of the timing chain cover as viewed from the arrow V in FIG. 4 and 5, the clamp base 22 has a clamp seat 22a continuous from the front surface 23a, and a back surface 22b located on the opposite side of the clamp seat 22a and facing the cylinder block 15. The clamp base 22 is formed with a circular hole 22h that penetrates from the clamp seat 22a to the back surface 22b.

  The resin clamp 61 includes a gripping part 63 and a locking part 64. The holding part 63 is formed with an opening 62 for fixing the wire harness 57 in a sandwiched state. The locking part 64 has a bowl-shaped cross-sectional shape. When the locking part 64 is press-fitted into the hole 22h until the gripping part 63 comes into contact with the clamp seat 22a, the end of the locking part 64 is hooked on the back surface 22b. This prevents the resin clamp 61 once attached from being detached from the clamp base 22.

  The shape of the resin clamp 61 is not limited to the shape shown in FIG. 4. For example, the wire harness 57 is attached to the locking portion locked to the clamp base 22 using a binding band. The shape may be fixed.

  The wire harness clamp structure according to the first embodiment of the present invention has a clamp chain 22 as a plurality of attachment portions, and a timing chain cover as a casing of a crankshaft 12 (timing chain 13 and crank sprocket 14) as a rotating device. 21 and a timing chain cover 21, and attached to each of a crankshaft pulley 31 as a rotating body that rotates while exchanging rotational force with the crankshaft 12, and a plurality of clamp tables 22, And a resin clamp 61 as a clip member for fixing the wire harness 57 for use. The plurality of clamp bases 22 are formed integrally with the timing chain cover 21.

  The clamp structure of the wire harness in this Embodiment is used for the engine 10 as an internal combustion engine. The crankshaft pulley 31 as a rotating body rotates by the rotational force output from the engine 10. The wire harness 57 performs electrical connection of an oil level sensor 58 as an electronic device that constitutes the engine 10.

  According to the clamp structure of the wire harness in the first embodiment of the present invention configured as described above, the clamp base 22 is formed integrally with the timing chain cover 21, so that the clamp is separate from the timing chain cover 21. There is no need to provide a stand. Thereby, the positioning accuracy of the wire harness 57 does not deteriorate due to an attachment error or deformation of the separate clamp base. For this reason, the wire harness 57 can be accurately fixed at a predetermined position, and the wire harness 57 and the crankshaft pulley 31 can be prevented from contacting each other. In addition, since a separate clamp base is not provided, it is possible to reduce component costs and assembly costs. Further, when the separate clamp base is fastened together with the bolt 25 for fixing the timing chain cover 21, the looseness of the bolt becomes a problem, but in this embodiment, such a problem does not occur.

  In the engine 10 to which the wire harness clamp structure is applied in the present embodiment, a large number of rotating bodies are provided so as to be exposed to the outside. Therefore, when wiring a wire harness to the engine 10, a route must be taken in the vicinity of the rotating body, increasing the risk of contact between the wire harness and the rotating body. Therefore, the present invention capable of accurately positioning the wire harness can be effectively used for an internal combustion engine such as a diesel engine or a gasoline engine.

  In the present embodiment, the case where the clamp base 22 is integrally formed with the timing chain cover 21 has been described, but the present invention is not limited to this. For example, a clamp base to which the resin clamp 61 is attached may be formed integrally with the casing of the water pump 34, or the clamp base is integrated with a casing such as an air conditioner compressor, P / S pump, or alternator (not shown). It may be formed. In this case, it can prevent that the pulley which rotates adjacent to these casings, and the wire harness fixed to a clamp stand by a resin clamp contact.

  Further, an idler pulley or a belt tensioner pulley that is positioned near the timing chain cover 21 and that is belted between the crankshaft pulley 31 may be provided. In the present embodiment, the wire harness 57 can be accurately positioned. In this case, the concern that the wire harness 57 contacts the idler pulley or the belt tensioner pulley is eliminated.

(Embodiment 2)
FIG. 6 is a front view showing an engine in which the wire harness clamp structure according to Embodiment 2 of the present invention is used. In the figure, the same reference numerals are given to the same or corresponding members as compared to FIG. The wire harness clamp structure in the present embodiment basically includes the same structure as the wire harness clamp structure in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

  With reference to FIG. 6, in this Embodiment, the long hole 22j is formed in each of the clamp stand 22. As shown in FIG. The long hole 22j has a long diameter extending in a direction away from the crankshaft pulley 31, that is, in a radial direction of the crankshaft pulley 31. With such a configuration, the resin clamp 61 is attached to the clamp base 22 while the position of the resin clamp 61 is adjusted in the radial direction of the crankshaft pulley 31.

  According to the clamp structure of the wire harness in the second embodiment of the present invention configured as described above, the same effect as that described in the first embodiment can be obtained. In addition, when the distance between the crankshaft pulley 31 and the wire harness 57 is too close, the position of the resin clamp 61 is moved along the major axis direction of the long hole 22j to increase the distance between the two. Can do. Thereby, contact with crankshaft pulley 31 and wire harness 57 can be prevented more reliably.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view showing an engine in which a wire harness clamp structure according to Embodiment 1 of the present invention is used. It is a front view which shows the engine seen from the arrow II in FIG. It is a front view which expands and shows the position in which the crankshaft pulley and air-conditioner compressor pulley in FIG. 2 were provided. It is sectional drawing of the timing chain cover along the IV-IV line in FIG. It is a bottom view of the timing chain cover seen from the arrow V in FIG. It is a front view which shows the engine in which the clamp structure of the wire harness in Embodiment 2 of this invention was used.

Explanation of symbols

  12 Crankshaft, 13 Timing chain, 14 Crank sprocket, 21 Timing chain cover, 22 Clamp base, 22h Hole, 22j Long hole, 31 Crankshaft pulley, 32 Water pump pulley, 38 Air conditioner compressor pulley, 39 Power steering pump pulley, 40 Alternator pulley, 57 level sensor wire harness, 61 resin clamp.

Claims (4)

A casing of the rotating device having a plurality of attachment portions;
A rotating body that is adjacent to the casing and rotates while giving and receiving rotational force to and from the rotating device;
A clip member that is attached to each of the plurality of attachment portions and fixes the wire harness,
The plurality of attachment portions are clamp structures for a wire harness that are integrally formed with the casing.   2. The wire harness clamp structure according to claim 1, wherein the rotating body is any one of a crankshaft pulley, an alternator pulley, a water pump pulley, a power steering pulley, and an air conditioner compressor pulley. A hole is formed in each of the plurality of attachment portions,
The clamp structure for a wire harness according to claim 1 or 2, wherein the clip member is attached to the plurality of attachment portions by being inserted into the hole.   The clamp structure for a wire harness according to claim 3, wherein the hole is a long hole having a long diameter, and the long diameter extends along a direction away from the rotating body.

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