JPH1183879A - Locking structure for wheel speed sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking structure with which interference with part items near a wheel speed sensor can be avoided, damage to sensor harness can be prevented, and costs can be reduced by clamping the parts together with the wheel speed sensor. SOLUTION: In this locking structure for a pickup sensor 3, in which sensor harness 8 is laid along the top of a rear axle housing 1, a fixed bracket 5 is placed in relation to the sensor harness 8, and the sensor harness 8 is attached to the cylindrical end 11 a of the narrow part 11 of the fixed bracket 5. The broad part 10 of the first end of the fixed bracket 5 is clamped together with the base part 3a of the pickup sensor 3 and secured to a flange 2 at the end of the rear axle housing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a wheel speed sensor in a four-wheeled vehicle.

[0002]

2. Description of the Related Art Conventionally, a four-wheeled vehicle is equipped with a wheel speed sensor (pickup sensor) for detecting wheel speed in order to control driving and braking (traction control, ABS (anti-skid brake system), etc.). Have been. The pickup sensor is often installed near a drive shaft or a tire in order to detect a wheel speed, and a detection signal is input to a control device (microcomputer or the like) via a sensor harness from a location where the pickup sensor is installed. ing. Such a sensor harness must be routed in such a manner that it follows various movements (stroke, steering) of the suspension system and does not interfere with peripheral parts.

FIG. 5 shows an example of a fixing structure of an ABS pickup sensor. The pickup sensor 51 in FIG. 5 has its base 51 a fastened to the left and right ends of a rear axle housing 53 by bolts 52. For this reason, flanges (hubs) 54 for accommodating a sensor ring (not shown) are provided at both left and right ends of the rear axle housing 53. One end of a sensor harness 55 is connected to the pickup sensor 51,
The other end of the sensor harness 55 is connected to a control device (not shown). The intermediate portion of the sensor harness 55 usually has a pickup sensor 5
It is fixed at a position slightly away from the base 51a.
For this reason, a support bracket 56 is fixed to the outer surface of the rear axle housing 53, and an intermediate portion of the sensor harness 55 is attached to the support bracket 56. In FIG. 5, reference numeral 57 denotes a shock absorber provided near the pickup sensor 51.

[0004]

However, in the above-mentioned conventional fixing structure, the intermediate portion of the sensor harness 55 is connected to the base 51 of the pickup sensor 51 as shown in FIG.
Since the sensor harness 55 is fixed at a position slightly away from the sensor harness 55, the sensor harness 55 has a different way due to a dimensional error of the sensor harness 55, and the sensor harness 55 may be damaged by interference with the shock absorber 57, the pipe, and the like. . For this reason, in the conventional fixing structure, since it is necessary to avoid an interfering object such as the shock absorber 57 and the pipe, the clearance between the interfering object and the sensor harness 55 is increased.
Therefore, the degree of freedom of design is small and the cost is disadvantageous.

The present invention has been made in view of such circumstances, and has as its object to avoid interference with parts near the wheel speed sensor, prevent damage to the sensor harness, and cooperate with the wheel speed sensor. It is an object of the present invention to provide a wheel speed sensor fixing structure capable of reducing costs by tightening or the like.

[0006]

According to the present invention, there is provided a wheel speed sensor fixing structure in which a sensor harness is routed along an axle housing. The sensor harness is attached to the distal end of the fixed bracket, and the base end of the fixed bracket is fastened together with the wheel speed sensor to be fixed to the end of the axle housing. ing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

1 to 4 show an embodiment of a fixing structure of a wheel speed sensor according to the present invention. The rear axle housing 1 in the figure is disposed along the rear width direction of a four-wheeled vehicle, and an axle (not shown) is rotatably accommodated therein. A cylindrical flange (hub) 2 for accommodating a sensor ring, a bearing, an oil seal and the like (not shown) is fixed to the outer periphery of both left and right ends of the rear axle housing 1 by welding or the like. A boss 2a is provided on the outer peripheral surface on the side.

The boss portion 2a of the flange 2 has a structure shown in FIGS.
As shown in FIG. 3, a base 3a of an ABS pickup sensor 3, which is a wheel speed sensor, is fixed together with a fixing bracket 5 to be described later by a tightening bolt 4. For this reason, a mounting plate 6 extending in the vehicle width direction is fixed to the base 3a of the pickup sensor 3 by welding so as to be fastened together with the fixing bracket 5, and the mounting plate 6 is fastened to the inside end of the vehicle body. A bolt hole 7 into which the bolt 4 is inserted is formed. For example, the pickup sensor 3 is fitted with a sensor ring in which irregular teeth at regular intervals are engraved along the circumferential direction at the end of the axle, and an electromagnetic sensor unit is disposed facing the irregular teeth near the sensor ring. The wheel speed is detected by measuring the rotation speed of the axle. A signal detected by the pickup sensor 3 is sent to a control device (not shown) via the sensor harness 8. Therefore, one end of a sensor harness 8 is connected to the pickup sensor 3, and the other end of the sensor harness 8 is connected to a control device (not shown).

On the other hand, an intermediate portion of the sensor harness 8 is fixed at a position slightly away from the base 3a of the pickup sensor 3 by a support bracket 9 attached to the outer surface of the rear axle housing 1. Moreover, the intermediate portion of the sensor harness 8 according to the embodiment of the present invention is further located near the flange 2 of the rear axle housing 1, and between the base 3 a of the pickup sensor 3 and the support bracket 9 by the fixing bracket 5. It is fixed and held, and is disposed so as to be drawn obliquely upward on the front side of the vehicle body with respect to the base 3 a of the pickup sensor 3.

As shown in FIGS. 2 to 4, the fixing bracket 5 is an integrally molded product provided in association with the sensor harness 8, and has a rectangular wide portion 10 serving as a base end and a rectangular wide portion 10. It is constituted by a band-shaped narrow portion 11 extending obliquely upward from the upper end of the wide portion 10 toward the front side of the vehicle body. The wide portion 10 is a portion that is fastened together with the base 3a of the pickup sensor 3, and an insertion hole 12 for inserting the shaft portion of the tightening bolt 4 is formed substantially in the center thereof. The base 3 of the pickup sensor 3 is provided on the left and right sides of the wide portion 10.
arc-shaped notches 10a and 10b corresponding to the outer peripheral surface of the notch 10a are provided so as to face each other.
10b is connected to the base 3 of the pickup sensor 3.
The wide portion 10 is configured as a detent for the pickup sensor 3 by being brought into contact with and engaged with a.
In the embodiment of the present invention, the notch 10 a is in contact with the base 3 a of the pickup sensor 3 installed on the left side of the rear axle housing 1, and the notch 10 b is the base of the pickup sensor 3 installed on the right side of the rear axle housing 1. 3a, so that parts can be shared.

At the tip of the narrow portion 11 of the fixing bracket 5, a cylindrical portion 11a formed by folding the narrow portion 11 is provided along the lateral direction, and the sensor harness 8 is fixed to the cylindrical portion 11a by caulking. It is configured as follows. In addition, the intermediate portion of the narrow portion 11 is formed in a curved shape corresponding to the cross-sectional shape of the rear axle housing 1 by bending the intermediate portion in the opposite direction so as to be rounded in the opposite direction,
The fixing bracket 5 itself does not interfere with the sensor harness 8. In FIG. 1, reference numeral 13 denotes a shock absorber disposed in the vertical direction in the vicinity of the pickup sensor 3.

In the fixing structure according to the embodiment of the present invention,
The sensor harness 8 is fixed to the cylindrical portion 11a of the narrow portion 11 of the fixed bracket 5 by caulking, and the wide portion 10 of the fixed bracket 5 is fastened together with the base 3a of the pickup sensor 3 to fix the flange 2 of the rear axle housing 1. , It is possible to avoid interference between the wired sensor harness 8 and an interference object (pipe, shock absorber 13, etc.) near the pickup sensor 3. Further, in the fixing structure according to the embodiment of the present invention, one of the notches 10 a and 10 b of the wide portion 10 is brought into contact with and engaged with the base 3 a of the pickup sensor 3, so that the fixing bracket 5 is formed. Since the wide portion 10 is configured to prevent the rotation of the pickup sensor 3, the rotation of the pickup sensor 3 can be reliably prevented with a simple structure without using a separate member.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible based on the technical idea of the present invention. For example, if the fixed bracket 5 can hold the sensor harness 8 and can be fastened together with the base 3 a of the pickup sensor 3, a shape other than the illustrated shape can be used.

[0015]

As described above, the fixing structure of the wheel speed sensor according to the present invention is such that the sensor harness is routed along the axle housing, and the fixing bracket is disposed in connection with the sensor harness. And the sensor harness is attached to the distal end of the fixed bracket, and the base end of the fixed bracket is fastened together with the wheel speed sensor to be fixed to the end of the axle housing. It is possible to prevent the sensor harness from interfering with the parts near the wheel speed sensor without taking a large clearance, thereby preventing damage to the sensor harness and the cost due to joint tightening with the wheel speed sensor. Down and assemblability can be improved.

Further, in the fixing structure of the present invention, an arc-shaped notch corresponding to the outer periphery of the base of the wheel speed sensor is provided on both sides of the base end of the fixing bracket, and one of the notches is connected to the base of the wheel speed sensor. By contacting the fixed bracket, the base end of the fixed bracket is configured as a detent for the wheel speed sensor, or the fixed bracket is formed into a curved shape corresponding to the cross-sectional shape of the axle housing. Therefore, it is possible to simplify the detent structure of the wheel speed sensor and to prevent the fixing bracket itself from interfering with the sensor harness.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pickup sensor fixed by a fixing structure according to an embodiment of the present invention.

FIG. 2 is a front view showing the pickup sensor viewed from a direction indicated by an arrow X in FIG. 1;

FIG. 3 is a side view showing the pickup sensor.

FIG. 4 is a perspective view showing a fixing bracket used for fixing a sensor harness of the pickup sensor.

FIG. 5 is a perspective view showing a pickup sensor fixed by a conventional fixing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear axle housing 2 Flange 3 Pickup sensor 4 Tightening bolt 5 Fixing bracket 6 Mounting plate 7 Bolt hole 8 Sensor harness 10 Wide part 11 Narrow part 12 Insertion hole

Claims (3)

[Claims] 1. A wheel speed sensor fixing structure in which a sensor harness is routed along an axle housing,
A fixed bracket is provided in connection with the sensor harness, and the sensor harness is attached to a distal end of the fixed bracket, and a base end of the fixed bracket is fastened together with a wheel speed sensor to an end of the axle housing. A structure for fixing a wheel speed sensor, characterized in that the wheel speed sensor is fixed. 2. An arc-shaped notch corresponding to the outer periphery of the base of the wheel speed sensor is provided on both sides of the base end of the fixed bracket, and one of the notches is brought into contact with the base of the wheel speed sensor. 2. The fixing structure for a wheel speed sensor according to claim 1, wherein a base end of the fixing bracket is configured to prevent rotation of the wheel speed sensor. 3. The wheel speed sensor fixing structure according to claim 1, wherein the fixing bracket has a curved shape corresponding to a cross-sectional shape of the axle housing.