JPH1169573A - Cable-fitting construction and grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet and a cable-fitting construction constituted such that the number of parts and assembling man-hours required can be reduced. SOLUTION: A cable-fitting construction for inserting a cable into a thorough- hole provided in a partition and fixing it, has a cable inserting hole 15 in a grommet 11 to be inserted and fitted into the through-hole incapable of turning, and this cable-inserting hole 15 and a cross section which cross with the axis at right angles of a part 11b to be inserted into the inserting hole 15 of the cable have a non-circular shape in common. Consequently, it becomes possible to easily perform turn prevention of the cable, so that it becomes unnecessary to temporarily fix the end of the drooping part of the cable to the partition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a portion for attaching a signal transmission cable of a wheel speed detector to a vehicle body, and a grommet provided on the attachment portion.

[0002]

2. Description of the Related Art For example, in an anti-lock brake system for individually controlling the braking force of a wheel, a rotation detector for detecting the rotation speed of the wheel is individually provided for each wheel. This rotation detector is fixed to the knuckle that supports the wheels, but the knuckle that forms a part of the suspension device moves up and down with respect to the vehicle body, so the processing of the cable that transmits the electric signal output by the rotation detector is It becomes a problem.

Conventionally, as shown in FIG. 4, after fixing an intermediate portion of a cable C drawn from a rotation detector P to a knuckle through a plurality of stays S, the vertical movement of the knuckle can be absorbed. After the cable is slackened, the terminal of the slack portion of the cable is temporarily fixed to an appropriate place inside the wheel house via the bracket B so that the cable C is not twisted or pulled, and then the through hole provided in the wheel house is provided. The cable was drawn into the engine room or the cabin through the vehicle.

[0004]

According to this conventional structure, a grommet G for preventing the cable C from being damaged at the inner peripheral edge of the through hole formed in the steel plate is required, and the grommet G is provided inside the wheel house. A bracket B for fixing the cable C was required.

The present invention has been devised to improve the structure of such a conventional cable fixing portion, and its main object is to reduce the number of parts and the number of assembly steps. An object of the present invention is to provide a cable mounting structure and a grommet.

[0006]

In order to achieve the above object, according to a first aspect of the present invention, there is provided a cable mounting structure for inserting and fixing a cable through a through hole provided in a partition wall. The shape of the cross section perpendicular to the axis of the cable insertion hole provided in the grommet that is non-rotatably mounted in the hole and the portion inserted into the cable insertion hole,
Both had the same non-circular shape. As a result, the cable can be easily stopped from rotating, so that it is not necessary to temporarily fix the terminal of the slack portion of the cable to the partition. In claim 2, a slit is provided along the axial direction in the insertion hole of the grommet so that a cable can be inserted into the insertion hole from the radial outside through the slit. according to this,
The cable can be easily attached to the grommet.

According to a third aspect of the present invention, a grommet interposed in a cable insertion fixing portion with respect to a through hole provided in a partition wall is provided with an outer member which is non-rotatably engaged with the through hole, and is rotatably connected to the cable. And an inner member engaged so that the inner member cannot move in the axial direction, and an insertion hole through which the inner member is inserted is provided in the outer member, and the axis of the insertion hole and a portion inserted through the insertion hole of the inner member is provided. The shapes of the cross sections orthogonal to each other are the same non-circular shape. This also makes it easy to keep the cable from turning,
There is no need to temporarily fix the end of the slack portion of the cable to the partition.

According to a fourth aspect of the present invention, the outer member and the inner member are provided with flanges larger than the inner diameter of the insertion hole provided in the outer member at both ends in the axial direction of a portion inserted into the insertion hole of the inner member. Are prevented from relatively shifting in the axial direction.

According to a fifth aspect of the present invention, the inner member is made of an elastomer material, and a force applied to the cable is absorbed by its elastic deformation.

In the sixth aspect, a slit is provided in the insertion hole of the outer member along the axial direction, and the inner member can be attached to the insertion hole from the outside in the radial direction through the slit. It can be easily installed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to an embodiment shown in the accompanying drawings.

FIG. 1 shows a main part of a front wheel suspension system to which the present invention is applied. In the figure, upper and lower ends of a knuckle 2 supporting a wheel hub (brake rotor) 1 are connected via ball joints to outer ends of an upper arm 3 and a lower arm 4 which are swingably connected to a vehicle body, respectively. I have.

An electromagnetic proximity sensor 6 for detecting the rotational speed of the axle (wheel) 5 is bolted near a bearing provided on the knuckle 2 to support the axle 5.
From the proximity sensor 6, a signal transmission cable 7 is drawn out. An intermediate portion of the cable 7 is bolted or nut-fixed to a proper position of the knuckle 2 and the upper arm 3 via a stay 8. It should be noted that the cable 7 has a proper distance between the fixed portion for the knuckle 2 and the fixed portion for the upper arm 3 so as not to hinder the angle change between the knuckle 2 and the upper arm 3 due to the vertical movement and the turning motion of the wheels. Have been sagged.

The portion beyond the fixed portion of the cable 7 with respect to the upper arm 3 has an appropriate slack so as not to hinder the vertical swinging movement of the upper arm 3. It is drawn into the engine room through the hole 10. The end of the slack portion of the cable 7 is fixed to the through hole 10 via a grommet 11 made of a synthetic resin material so that the cable 7 is not twisted and maintains an appropriate slack.

FIG. 2 shows the grommet 11. The grommet 11 includes an outer member 11 a directly engaging with the through hole 10 and an inner member 1 directly engaging with the cable 7.
1b.

The outer member 11a comprises a pair of semi-cylindrical members 12a.
a and 12b are connected by a thin hinge portion 13. In order to close the two semi-cylindrical bodies 12a and 12b and maintain a cylindrical state, an engaging claw 14 is attached to the free end of one of the semi-cylindrical bodies 12a.
However, corresponding recesses (not shown) are formed at the free ends of the other semi-cylindrical body 12b so that the tips of the engaging claws 14 are hooked. In the center of the opposing inner surfaces of the semi-cylindrical bodies 12a and 12b, the inner peripheral contour on a plane perpendicular to the axis complements each other when the two semi-cylindrical bodies 12a and 12b are closed to form a D-shape. In other words, the non-circular) insertion hole 15
Are formed.

At the free end of the other semi-cylindrical body 12b, there is formed a projection 16 projecting from the outer peripheral surface which becomes a perfect circle when the two semi-cylindrical bodies 12a and 12b are closed. This protrusion 16
Through-hole 1 provided in steel plate constituting wheel house 9
The outer member 11a engages with the concave portion 17 (see FIG. 3) formed at 0 to prevent the outer member 11a from rotating.

One end of the cylindrical outer member 11a in the axial direction with the two semi-cylindrical members 12a and 12b closed is provided with:
A radially outward flange 18 is formed. The outer peripheral surfaces of the two semi-cylindrical bodies 12a and 12b are provided with projections 19 which normally protrude from the outer peripheral surfaces of the two semi-cylindrical bodies 12a and 12b and can be elastically deformed radially inward when an external force is applied. . By these, both semi-cylindrical bodies 12a and 12b
When the outer member 11a in a closed state is inserted into the through-hole 10 from the opposite side of the flange and strongly pressed, the protrusion 19 pressed by the inner peripheral edge of the through-hole 10 is deformed inward. Here, since a gap corresponding to the thickness of the steel plate forming the wheel house 9 is provided between the flange 18 and the protruding end of the protrusion 19, the protrusion 19 is restored when the flange 18 is brought into close contact with the wheel house 9. The outer member 11a does not come off from the through hole 10.

On the other hand, the inner member 11b is formed of a synthetic rubber material, has a D-shaped outer contour corresponding to the shape of the insertion hole 15, and has a length corresponding to the axial length of the insertion hole 15. A radially outward flange 20 is formed at each end. This inner member 11b
Is fixed to the outer surface of the coating of the cable 7 at an appropriate position of the cable 7 by, for example, an adhesive.

The inner member 11b fixed to the cable 7 is opened from the slit-shaped open surface 21 along the axial direction formed between the two semi-cylindrical bodies 12a and 12b of the open outer member 11a in the radial direction. It is inserted into the insertion hole 15 inward. When the two semi-cylindrical bodies 12a and 12b are closed in this state, the cross-sectional shapes of the inner member 11b and the insertion hole 15 are non-circular with the same shape, and the flanges 20 are formed at both ends of the inner member 11b. The inner member 11b fixed to the cable 7 is the outer member 11a.
Are connected integrally so as to be unable to move in the axial direction and to be unable to rotate.

By attaching the grommet 11 fixed to the cable 7 in the through hole 10 of the wheel house 9 in this way, the cable 7 is immovable and non-rotatable with respect to the wheel house 9, that is, the vehicle body. Will be attached.

In the above embodiment, the inner member 11b is an independent member. However, the cross-sectional shape of a part of the coating of the cable 7 is the same as that of the insertion hole 15 provided in the outer member 11a of the grommet 11. The inner member 11b may be omitted. In addition, the cable 7 for the knuckle 2
And the upper arm 3 also has a cable 7
However, the fixing position of the cable 7 with respect to the movable portion may be appropriately determined according to the type of the suspension device and the mounting position of the proximity sensor 6.

[0023]

As described above, according to the first or third aspect of the present invention,
According to the configuration, the grommet interposed in the through hole of the vehicle body can easily fix the position of the cable in the axial direction and can easily prevent rotation, so that the number of cable fixing brackets (stays) can be reduced. Installation man-hours can be reduced. In particular, by adopting the structure of claim 2 or 6, the attachment of the cable to the grommet can be enhanced.
According to the third aspect of the invention, the cable can be prevented from shifting in the axial direction by the flange.
According to the configuration, it is possible to prevent unnecessary force from being applied to the cable due to the elastic deformation of the inner member.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a front wheel suspension device to which the present invention is applied.

FIG. 2 is an exploded perspective view of the grommet according to the present invention.

FIG. 3 is a contour diagram of a through hole.

FIG. 4 is an external view of a conventional cable assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hub 2 Knuckle 3 Upper arm 4 Lower arm 5 Wheel 6 Proximity sensor 7 Cable 8 Stay 9 Wheel house 10 Through hole 11 Grommet 11a Outer member 11b Inner member 12a / 12b Semi-cylindrical body 13 Hinge part 14 Engagement claw 15 Insertion hole 16 Convex part 17 recess 18 flange 19 protrusion 20 flange 21 open surface

Claims (6)

[Claims] 1. A cable mounting structure for inserting and fixing a cable into a through hole provided in a partition wall, wherein a cable insertion hole is provided in a grommet that is non-rotatably mounted in the through hole. The shape of the cross section orthogonal to the axis of the insertion hole and the portion of the cable inserted into the insertion hole,
A cable mounting structure characterized in that both have a non-circular shape. 2. The insertion hole according to claim 1, wherein the insertion hole has a slit extending along an axial direction, and the cable is inserted into the insertion hole from the radial outside through the slit. Cable mounting structure. 3. A grommet interposed in a fixing portion for inserting a cable into a through hole provided in a partition wall, wherein the outer member is non-rotatably engaged with the through hole; An inner member engaged in an axially immovable manner; an insertion hole through which the inner member is inserted is provided in the outer member; and an axis of the insertion hole and a portion of the inner member inserted through the insertion hole. A grommet, characterized in that the cross sections orthogonal to each other have the same non-circular shape. 4. A flange larger than the inner diameter of the insertion hole is provided at both ends in the axial direction of a portion of the inner member to be inserted into the insertion hole.
The grommet described in. 5. The grommet according to claim 3, wherein the inner member is made of an elastomer material. 6. The insertion hole according to claim 3, wherein the insertion hole has a slit along the axial direction, and the inner member is inserted into the insertion hole from the radial outside through the slit. Grommet described.