JPH09272417A - Wheel speed sensor fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel speed sensor fitting device to which a wheel speed sensor can be fitted while restraining the increase in the weight of a steering knuckle. SOLUTION: An arm 4c to be connected to a steering system is projectedly provided to a steering knuckle 4, and also a reinforcing rib 8 is integrally provided to the outer circumferential part of the arm 4c, and a wheel speed sensor 10 is fitted to the reinforcing rib 8 so that its axis is parallel with the axis of the wheel. A sensor rotor 20 on which a large number of tooth parts 20a are formed at equal intervals in the position opposite to the wheel speed sensor 10 is fitted so as to be concentric with the wheel and also to be integrally rotatable with the wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel speed sensor mounting device, and more particularly to a device for mounting a wheel speed sensor on a steering knuckle.

[0002]

2. Description of the Related Art Conventionally, an antilock brake system (ABS) needs to detect the rotational speeds of all four wheels of an automobile. For this reason, there is known a steering wheel knuckle for steering front wheels, to which a wheel speed sensor is attached, as in JP-A-3-159802.

That is, the wheel hub is rotatably supported by the spindle of the steering knuckle via bearings, and the sensor rotor is fixed to the wheel hub. An outward flange is formed at one end of the sensor rotor, and the flange is provided with irregularities along its circumference. On the other hand, a mounting flange is formed on the steering knuckle, and a wheel speed sensor is mounted on this flange so as to face the irregularities of the sensor rotor.

[0004]

However, in the case where the sensor knuckle is formed on the steering knuckle as described above, the above flange is a portion that does not produce any added value, and therefore the steering knuckle is as much as the flange. Will increase the weight and increase the cost.

Therefore, an object of the present invention is to provide a wheel speed sensor mounting device capable of mounting a wheel speed sensor while suppressing an increase in weight of a steering knuckle.

[0006]

In order to achieve the above object, the present invention provides a steering knuckle with an arm connected to a steering device in a protruding manner, and a reinforcing rib integrally provided on an outer peripheral portion of the arm. A wheel speed sensor is attached to this reinforcing rib so that its axis is parallel to the axis of the wheel, and a sensor rotor having a large number of teeth formed at equal intervals at positions facing the wheel speed sensor is concentric with the wheel. It is attached so that it can rotate integrally with the wheel.

An arm connected to the steering device is integrally provided on the steering knuckle so that a large load may be applied from the wheels to the arm while riding on a rock or the like during traveling. Therefore, in order to reinforce this arm, a reinforcing rib is formed on the outer surface of the arm. In the present invention, since the reinforcing rib is used as the sensor mounting seat, the wheel speed sensor can be mounted without substantially increasing the weight of the steering knuckle.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a front wheel support mechanism including a wheel speed sensor mounting device according to the present invention. The axle 1b is connected to the tip of the drive shaft 1a. A wheel hub 2 is spline-fitted to the outer periphery of the axle 1b, and the wheel hub 2 is rotatably supported by a tubular steering knuckle 4 via a bearing 3.

2 to 4, an upper arm 4a connected to the shock absorber 5 is integrally formed at the upper end of the steering knuckle 4, and a lower arm 6 is connected to the lower end of the steering knuckle 4. The lower arm 4b is integrally formed. A rear arm 4c extending substantially horizontally rearward is integrally formed at the rear of the steering knuckle 4, and the end of a tie rod (not shown) of the steering device is provided at the tip of the rear arm 4c. They are connected via a joint 7. A reinforcing rib 8 is integrally formed on the upper side of the rear arm 4c, particularly between the upper arm 4a and the rear arm 4c in a direction substantially orthogonal to the axis of the axle 1b. This reinforcing rib 8 has
A hole 8a into which the detecting portion 10a of the wheel speed sensor 10 is fitted,
A screw hole 8b into which the mounting bolt 11 of the sensor 10 is screwed is formed. By fitting the detecting portion 10a into the hole 8a and screwing the mounting bolt 11 into the screw hole 8b, the sensor 10 is fixed to the reinforcing rib 8 such that its axis is parallel to the axis of the axle 1b. .

In the steering knuckle 4, disc brake mounting seats 12 and 13 are integrally formed on the front side of the upper arm 4a and the front side of the lower arm 4b, respectively. The caliper (not shown) is fixed.

The disc rotor 14 is arranged on the outer surface of the wheel hub 2, and the disc wheel 15 is arranged on the outer surface of the disc rotor 14, and the three members are fastened together by the hub bolt 16. The caliper of the disc brake is adapted to press a brake pad (not shown) to both inner and outer surfaces of the disc rotor 14. A dust cover 17 made of a non-magnetic metal plate is arranged inside the vehicle body of the disc rotor 14, and an inner diameter portion of the dust cover 17 is press-fitted and fixed to an outer peripheral surface of the steering knuckle 4. The dust cover 17 is formed with a through hole 17a facing the detection portion 10a of the wheel speed sensor 10.

A sensor rotor 20 made of a magnetic metal plate is fixed to the wheel hub 2 with screws 21. The sensor rotor 20 is arranged on the inner diameter side of the disk rotor 14, and since the sensor rotor 20 is also covered with the dust cover 17, foreign matter such as water, mud, and dust is prevented from coming into contact with and adhering to the sensor rotor 20. It can be prevented. The wheel speed sensor 10 on the outer peripheral portion of the sensor rotor 20
At a position facing the detection unit 10a, tooth portions 20a composed of a large number of punched holes are circumferentially formed at equal intervals.

Tooth portion 20a formed on the sensor rotor 20
It is not limited to the punched hole as in the embodiment, but may be a notch or may be uneven. In any case,
It is sufficient that the wheel speed sensor 10 can obtain a pulse output or an AC output as the sensor rotor 20 rotates. The tooth portion 20 of the sensor rotor 20 as in the embodiment
When a is punched out, there is no substance deposited on the teeth, and there is no change in the tooth height difference that affects the sensor output, so there is the advantage that a stable output can be obtained.

The sensor rotor 20 is mounted by screwing from the back side (inside the vehicle body) to the wheel hub 2 as in the embodiment, as well as screwing from the front side, press fitting and fixing to the wheel hub 2, and the disc rotor 7. It is possible to adopt various methods such as press-fitting and fixing to. In any case, it is desirable to dispose the disk rotor 14 on the inner diameter side and at the position covered with the dust cover 17.

The present invention is not limited to the above embodiment. Although the steering knuckle 4 rotatably holds the axle 1b via the bearing 3 in the above embodiment, the present invention can be similarly applied to a steering knuckle having a spindle. Further, the position of the reinforcing rib 8 of the present invention is not limited to the upper side of the steering coupling arm 4c as in the embodiment, but may be provided on the lower side. However, the steering connecting arm 4c is the steering knuckle 4
Since it extends substantially horizontally from the rear side to the rear side, the wheel speed sensor 10 is attached to the rib 8 provided on the upper side of the arm 4c.
When the wheel speed sensor 10 is attached, there is an effect that the arm 4c serves as a shield against the mud splashes and water splashes on the wheel speed sensor 10 and stone contact, and the wheel speed sensor 10 can be effectively protected.

[0016]

As is apparent from the above description, according to the present invention, the reinforcing rib of the steering connecting arm provided in the steering knuckle is used as the sensor mounting seat, so that the steering is performed while the arm is being reinforced. The wheel speed sensor can be mounted without substantially increasing the weight of the knuckle.

[Brief description of drawings]

FIG. 1 is a sectional view showing a front wheel support structure according to the present invention.

FIG. 2 is a perspective view of a steering knuckle.

FIG. 3 is a front view of the steering knuckle seen from the inside of the vehicle body.

FIG. 4 is a plan view of the steering knuckle shown in FIG.

[Explanation of symbols]

1b Axle 2 Wheel hub 4 Steering knuckle 4c Rear arm (arm for steering connection) 8 Reinforcing rib 10 Wheel speed sensor 14 Disc rotor 15 Disc wheel (wheel) 17 Dust cover 20 Sensor rotor

Claims (1)

[Claims] 1. A steering knuckle is provided with an arm connected to a steering device in a protruding manner, and a reinforcing rib is integrally provided on an outer peripheral portion of the arm. A wheel speed sensor has an axis parallel to the axis of the wheel. And a sensor rotor having a large number of teeth formed at equal intervals at a position facing the wheel speed sensor, the wheel being mounted concentrically with the wheel and integrally rotatable with the wheel. Speed sensor mounting device.