JP3309065B2 - Grommets for cable mounting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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 grommet.

[0006]

In order to achieve the above object, according to the present invention, there is provided a cable mounting grommet for inserting a cable through a through hole provided in a partition wall and fixing the cable. The outer member and the inner member are engaged with each other in the same cross section orthogonal to the axis and have a D-shaped cross section. The inner member is made of an elastomer material, and the outer member is formed by flanges at both ends in the axial direction. The outer member is openable and closable with a hinge, and the inner member can be inserted through an opening of the outer member. And a convex portion on the outer peripheral surface for engaging with the concave portion provided on the inner peripheral surface of the through hole of the partition wall, and a flange on the axial end surface. And Nji was assumed, characterized in that in locking state omission by the projection provided on the outer circumferential surface is intended to be fitted into the through hole of the partition wall.

With this structure, the inner member can be easily attached to the outer member, the cable can be easily prevented from rotating, and the outer member and the inner member can be relatively displaced in the axial direction. Since it is prevented, it is not necessary to temporarily fix the terminal of the slack portion of the cable to the partition. Moreover, the force applied to the cable by the elastic deformation of the inner member is absorbed.

[0008]

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 is provided with an appropriate slack so as not to hinder the vertical swinging movement of the upper arm 3, and a through hole provided in the wheel house (partition wall) 9. 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 includes 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. At the center of the opposing inner surfaces of the semi-cylindrical bodies 12a and 12b, the inner peripheral contour on a plane orthogonal to the axis complements each other when the semi-cylindrical bodies 12a and 12b are closed, and is orthogonal to the axis. An insertion hole 15 having a D-shaped cross section is 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 a concave portion 17 (see FIG. 3) formed in the inner peripheral surface of the outer member 11 to prevent the outer member 11a from rotating.

One end of the cylindrical outer member 11a in the axial direction with both semi-cylindrical bodies 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, which is fixed to the cable 7, extends radially from a slit-shaped open surface 21 formed between the two semi-cylindrical bodies 12a, 12b of the open outer member 11a along the axial 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 mounting the grommet 11 fixed to the cable 7 in the through hole 10 of the wheel house 9 in this way, the cable 7 cannot move in the axial direction and cannot rotate 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 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.

[0020]

As described above, according to the present invention, the cable can be easily attached to the grommet, the displacement of the cable in the axial direction can be prevented by the flange of the inner member, and the elasticity of the inner member can be reduced. Since unnecessary force can be prevented from being applied to the cable due to the deformation, the grommet interposed in the through-hole of the vehicle body can easily fix the axial position of the cable and prevent the cable from rotating, and the cable fixing bracket can be used. The effect of reducing the number of (stays) and accordingly the number of mounting steps can be greatly reduced.

[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 a grommet according to the present invention.

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

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

[Explanation of symbols]

 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 Concave part 18 Flange 19 Projection 20 Flange 21 Open surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-22631 (JP, A) JP-A-52-136384 (JP, A) JP-A 4-72424 (JP, U) JP-A 55-136 84813 (JP, U) Hikaru 6-2758 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 3/22 B60R 16/02 H01B 17/58 H02G 3/38

Claims (1)

(57) [Claims] 1. A grommet for attaching a cable for inserting and fixing a cable into a through hole provided in a partition wall, wherein the grommets have the same D-shaped cross section perpendicular to the axis and are engaged with each other. The inner member is made of an elastomer material, and the axial movement of the outer member with respect to the outer member is restricted by flanges at both ends in the axial direction. The inner member can be inserted through the opening thereof, and the opening is provided with engaging means for maintaining a closed state. The outer peripheral surface has a convex portion that engages with the concave portion provided on the peripheral surface, and the gap is held in a state where it is prevented from coming off by a flange on the axial end surface and a projection provided on the outer peripheral surface. A grommet for attaching a cable, which is fitted into a through hole in a wall.