KR20100061927A - Wheel speed sensing device for vehicle - Google Patents

Wheel speed sensing device for vehicle Download PDF

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Publication number
KR20100061927A
KR20100061927A KR1020080120292A KR20080120292A KR20100061927A KR 20100061927 A KR20100061927 A KR 20100061927A KR 1020080120292 A KR1020080120292 A KR 1020080120292A KR 20080120292 A KR20080120292 A KR 20080120292A KR 20100061927 A KR20100061927 A KR 20100061927A
Authority
KR
South Korea
Prior art keywords
wheel
disk
tone wheel
vehicle
sensor
Prior art date
Application number
KR1020080120292A
Other languages
Korean (ko)
Inventor
이세균
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020080120292A priority Critical patent/KR20100061927A/en
Publication of KR20100061927A publication Critical patent/KR20100061927A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/86—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration wherein the brakes are automatically applied in accordance with a speed condition and having means for overriding the automatic braking device when a skid condition occurs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Braking Arrangements (AREA)

Abstract

It is coupled to the hub on which the disk is mounted, and includes a tone wheel that is rotated when the disk is rotated, and a sensing sensor that is installed in close proximity to the tone wheel to detect the rotation speed of the tone wheel. A heat shield is formed to prevent radiant heat from being transmitted to the sensor.

Description

Wheel speed sensing device for vehicle

The present invention relates to a vehicle wheel speed detection device, and more particularly to a vehicle wheel speed detection device that can protect the detection sensor from the radiant heat generated by the rotation of the disk.

In general, a vehicle requires a speed sensor, that is, a wheel speed sensing device capable of appropriately applying a braking force by detecting a rotational speed of a wheel that rotates in a state where a braking force is applied when generating a braking force during driving.

The wheel speed sensing device is provided inside the disk that rotates with the wheel to detect the rotational speed of the wheel. The wheel wheel is coupled to the wheel shaft penetrating the disk and rotates when the disk is rotated. Using the principle that the change occurs, the rotational speed of the tone wheel is configured to include a sensor.

However, such a wheel speed detection device has a problem that the radiation heat generated by the rotation of the disk is transmitted to the detection sensor is damaged.

Accordingly, the present invention is to solve such a problem, an object of the present invention to provide a wheel speed sensor for a vehicle that can prevent the sensor from being damaged by the radiation generated by the rotation of the disk.

Embodiment of the present invention for achieving this object includes a tone wheel coupled to the hub on which the disk is mounted and rotated when the disk is rotated, and a sensing sensor installed in proximity to the tone wheel to detect the rotational speed of the tone wheel,

The outer periphery of the tone wheel is characterized in that the heat shield is formed to prevent the radiant heat generated by the rotation of the disk is transmitted to the sensor.

The heat shield may be formed in a shape extending outward from an outer circumference of the tone wheel.

As described in detail above, the vehicular wheel speed sensing apparatus according to the present invention can block the radiant heat of the disc from being transmitted to the sensing sensor as the heat shield is formed extending outward from the outer circumference of the tone wheel.

Hereinafter, a wheel speed sensing apparatus for a vehicle according to an embodiment of the present invention will be described in detail.

As shown in FIG. 1, a disc brake includes a disc 20 mounted on a hub 10 to which a wheel (not shown) of a vehicle is coupled and rotating together with the hub 10. The disk 20 generates a braking force by friction with a brake pad (not shown). The inner plate 21 and the outer plate 22 are formed by ribs 23 radially formed between the inner plate 21 and the outer plate 22. It is provided in one piece.

In addition, the disc brake includes a wheel speed detecting device 50 capable of appropriately applying a braking force by detecting the number of revolutions of the rotating wheel when the braking force is applied when generating the braking force during driving.

The wheel speed detecting device 50 is coupled to the hub shaft 11 penetrating the disk 20 and rotated together when the hub 10 rotates, and is installed in close proximity to the tone wheel 60 and the magnetic flux. It is configured to include a detection sensor 70 for detecting the rotational speed of the tone wheel 60 using the principle that the change is generated.

The tone wheel 60 has an appearance in which a tooth shape composed of a peak 61 and a valley 62 is repeatedly formed on an outer circumference of a disc shape. The tone wheel 60 is made of steel that is a ferromagnetic material, the hub shaft 11 is fitted in the center thereof is rotated when the disk 20 is rotated.

In addition, the tone wheel 60 includes a heat shield 63 to prevent the radiant heat generated when the disk 20 rotates, as shown in FIG. 2, to the sensor 70. The heat shield 63 is formed in a shape extending outward from the outer circumference of one side of the tone wheel 60, disposed between the disk 20 and the sensor 70 to detect the radiant heat of the disk 20 It prevents the transfer to the sensor 70.

The detection sensor 70 is provided to face the tone wheel 60 as shown in FIG. 1, and is mounted on a carrier 30 coupled to a vehicle body (not shown). A permanent magnet (not shown) for generating a magnetic force is installed inside the detection sensor 70, and a magnetic pole piece (not shown) for directing the magnetic flux generated from the permanent magnet toward the tone wheel 60 is provided in front of the permanent magnet. do. A coil (not shown) is wound between the pole piece and the permanent magnet to convert the change of magnetic flux into a voltage as the tone wheel 60 rotates.

Looking at the operation of the wheel speed detection device 50, the magnetic flux of the permanent magnet is first transmitted to the toothed tone wheel 60 via the magnetic pole pieces. At this time, when the tone wheel 60 is rotated, the position of the toothed peak 61 and the valley 62 of the tone wheel 60 is changed, and the magnitude of the magnetic flux passing through the coil in the sensor 70 is changed to alternating current with the coil. Voltage is generated. Since the frequency of the AC voltage is generated in proportion to the rotational speed of the tone wheel 60, this frequency is measured to detect the rotational speed of the wheel.

Radiation heat of the disk 20 can be transmitted to the sensor 70 in the above process, in the embodiment of the present invention, as the heat shield 63 is formed to extend outward from the outer circumference of the tone wheel 60 Radiation heat of the disk 20 may be prevented from being transmitted to the detection sensor 70. Accordingly, it is possible to prevent the detection sensor 70 from being damaged by the radiant heat of the disk 20.

1 is a view showing a disc brake provided with a wheel speed sensing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a tone wheel of the wheel speed sensor shown in FIG. 1.

** Description of the code for the main parts **

10: hub 11: hub shaft

20 disc 30 carrier

50: wheel speed detection device 60: tone wheel

61: Mountain of the tone wheel 62: Goal of the tone wheel

63: heat shield 70: detection sensor

Claims (2)

In the wheel speed sensor for a vehicle comprising a tone wheel coupled to the hub on which the disk is mounted and rotated when the disk is rotated, and a sensing sensor installed near the tone wheel to sense the rotational speed of the tone wheel. The outer periphery of the tone wheel vehicle speed sensor for a vehicle characterized in that the heat shield is formed to prevent the radiant heat generated by the rotation of the disk is transmitted to the sensor. The method of claim 1, Wherein the heat shield is a vehicle wheel speed sensing device, characterized in that formed in the shape extending outward from the outer circumference of the tone wheel.
KR1020080120292A 2008-12-01 2008-12-01 Wheel speed sensing device for vehicle KR20100061927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080120292A KR20100061927A (en) 2008-12-01 2008-12-01 Wheel speed sensing device for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080120292A KR20100061927A (en) 2008-12-01 2008-12-01 Wheel speed sensing device for vehicle

Publications (1)

Publication Number Publication Date
KR20100061927A true KR20100061927A (en) 2010-06-10

Family

ID=42362284

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080120292A KR20100061927A (en) 2008-12-01 2008-12-01 Wheel speed sensing device for vehicle

Country Status (1)

Country Link
KR (1) KR20100061927A (en)

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A201 Request for examination
E601 Decision to refuse application