JPH0661629U - Simple mounting type wheel sensor mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a simple mounting type wheel sensor mounting structure that does not require adjustment for each removal of a tire wheel and is easy to handle. [Structure] Ring member 1 having slits 11 on its peripheral surface
The disk member 6 provided with 2 and the ring member 8 provided on the peripheral surface via the bearing 9 is used in advance and fixed to the tire wheel 1 with the bolt 3. Further, a photo sensor including a light emitting element 13 and a light receiving element 14 is attached to the ring member 8 so as to sandwich the slitted ring member 12. The ring member 12 with a slit is rotated integrally with the tire wheel 1, and the rotation of the tire wheel 1 is optically detected by a photosensor according to the rotational position to obtain a detection signal. After this detection signal is converted into a transmission signal, it is transmitted from the antenna 17 to the receiving unit, and the receiving unit detects the rotation speed of the tire wheel 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure of a simple mounting type wheel sensor that detects the rotation speed of a tire wheel provided in a vehicle.

[0002]

[Prior art]

 Wheel sensors that detect the rotation speed of tire wheels are used in various vehicle control systems such as navigation systems.In conventional wheel sensors, a rubber magnet is installed inside the tire wheel and a coil is fixed to the shock absorber. It is composed of a combination of this rubber magnet and a coil.

When the tire wheel rotates while the vehicle is running, the rubber magnet attached to it also rotates together. Therefore, by detecting the change in the magnetic flux generated from the rubber magnet by the coil in the fixed state, A rotation pulse corresponding to the number of rotations of the tire wheel can be output from the coil.

[0004]

[Problems to be solved by the device]

 By the way, the conventional wheel sensor has a problem that it is very inconvenient to handle because adjustment is required every time the tire wheel is removed. In other words, it is necessary to remove the tire wheel each time tire rotation or tire replacement is performed, but it is necessary to re-install the tire wheel when mounting it. Moreover, technology is required to adjust the clearance of the rubber magnet, and if these adjustments are insufficient, the detection performance of the coil will deteriorate.

The present invention has been made to solve the above problems, and provides a mounting structure of a simple mounting type wheel sensor which does not require adjustment for each removal of a tire wheel and is easy to handle. The purpose is.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is detachably provided between a vehicle-side brake part and a tire wheel part, and has a detection part for detecting rotation on the inner circumference, which is slidable on the outer circumference. A plate-shaped rotating means that includes a movable sliding portion and is rotatable around the rotation axis of the tire wheel portion as the tire wheel portion rotates; and the tire wheel by sliding the sliding portion. The rotation detection unit is provided so as to maintain a predetermined position even when the unit rotates, and the rotation detection unit that detects the rotation of the tire wheel unit by the detection unit to obtain a detection signal and the detection signal is converted into a transmission signal and transmitted. The present invention is characterized by including a detecting and transmitting means including a transmitting section that transmits and outputs a signal to a receiving section at a predetermined position.

[0007]

[Action]

 The plate-shaped rotating means is detachably provided between the brake section and the tire wheel section, and has a detection section and a sliding section on the inner circumference and the outer circumference, respectively, and rotates as the tire wheel section rotates. The rotation detecting unit maintains a predetermined position even when the tire wheel unit rotates, and the detection unit detects the rotation of the tire wheel unit to obtain a detection signal. The transmission unit converts the detection signal into a transmission signal and transmits the transmission signal to the reception unit.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a mounting structure of a simple mounting type wheel sensor of the present invention, 1 is a tire wheel having a flat portion 1A and a supporting portion 1B along which the tire is mounted, 2 Is a brake rotor which is attached to the tire wheel 1 by the bolt 3 and can rotate integrally with the tire wheel 1, and 4 is a brake pad which is fixed to the support body 5 and can sandwich the brake rotor 2 from both sides. .

Reference numeral 6 denotes a disk member, which is provided with four through holes 7A, 7B, 7C, 7D from the central portion C toward the radial direction, for example, at intervals of 90 degrees, as shown in the side view of FIG. The bolt 3 is inserted through each of the through holes 7A to 7D, and is provided detachably between the tire wheel 1 and the brake rotor 2. As a result, the disc member 6 can rotate integrally when the tire wheel 1 rotates. Reference numeral 8 denotes a ring member provided on the peripheral surface of the disk member 6, and as shown in an enlarged view of the portion A in FIG. And is held by the disc member 6. Due to the existence of the bearing 9, even if the disc member 6 rotates integrally with the tire wheel 1, the ring member 8 is kept in a predetermined position and does not rotate due to the weight of the box member 10 described later.

As shown in FIG. 3, the ring member 8 has a box shape, and a box member 10 is attached to a predetermined position of the ring member 8. A ring member 12 having a large number of slits 11 is provided on the inner circumference 6B of the disc member 6 as shown in FIG. Inside the box-shaped ring member 8 or a box member 10 described later, a light emitting element 13 such as an LED and a light receiving element 14 such as a photodiode are attached so as to sandwich the ring member 12 with a slit. The light emitting element 13 and the light receiving element 14 constitute a photosensor, and when the ring member 12 with a slit that rotates integrally with the disk member 6 rotates between the elements 13 and 14, whether the slit 11 is present or not is detected. Accordingly, the rotation of the tire wheel 1 is detected by changing the state in which the light emitted from the light emitting element 13 is incident on the light receiving element 14. The rotating portion of the box member 10 is cut out so as not to hinder the rotation of the ring member 12.

Inside the box member 10, an amplifier 15 for amplifying a detection signal output from a light receiving element 14 as a photosensor and an FM modulation for converting the amplified detection signal into a transmission signal by, for example, FM modulation. A transmitter 16 is attached, and a transmission signal output from the FM modulator 16 is transmitted from an antenna 17 provided at a desired position of the vehicle to a receiver at an arbitrary position.

Next, the operation of this embodiment will be described. A ring member 12 provided with a bearing 9 and a slit 11 is provided on the outer circumference 6A and the inner circumference 6B of the peripheral surface in advance, and the box-shaped ring member 8 and the box member 10 are attached to the ring member 8 via the bearing 9. The disc member 6 thus formed is fixed between the tire wheel 1 and the brake rotor 2 with a bolt 3.

When the tire wheel 1 of the vehicle is rotated in this state, the disc member 6 and the ring member 12 with a slit rotate integrally with the tire wheel 1. When the ring member 12 rotates, the incident state of the light from the light emitting element 13 constituting the photo sensor on the light receiving element 14 changes depending on the rotational position of the ring member 12, and the slit 11 is provided on both elements as shown in FIG. At the timing located between 13 and 14, the light from the light emitting element 13 passes through the slit 11 and enters the light receiving element 14, so the light receiving element 14 outputs a detection signal such as A in FIG. 7, for example. On the other hand, at the timing when the slit 11 is not located between the elements 13 and 14 as shown in FIG. 6, the light from the light emitting element 13 is blocked by the ring member 12 and does not enter the light receiving element 14, so that the light receiving element 14 is, for example, A detection signal such as B in FIG. 7 is output. The light receiving element 14 outputs a rotation pulse in which the synchronization of the signals A and B is changed according to the rotation of the ring member 12.

The detection signal output from the light receiving element 14 is amplified by the amplifier 15, and then the detection signal is FM-modulated by the FM modulator 16 to be converted into a transmission signal and transmitted from the antenna 17. This transmission signal is transmitted to a receiving unit provided at an arbitrary position of the vehicle, and the receiving unit detects the signal and performs desired signal processing, thereby detecting the rotation speed of the tire wheel 1.

According to the present embodiment as described above, the rotation speed of the tire wheel 1 is not magnetically detected by combining a rubber magnet and a coil as in the conventional case, but a slit 11 is provided on the peripheral surface. The disk member 6 provided with the ring member 12 is fixed to the tire wheel 1 and these are rotated integrally with the tire wheel 1, and the rotational position of the ring member 12 is determined by the photosensor including the light emitting element 13 and the light receiving element 14. Since the rotation speed of the tire wheel 1 is detected optically, the conventional adjustment can be eliminated even if the tire wheel 1 is removed. That is, it is not necessary to adjust the mounting when the tire wheel 1 is mounted, and it is not necessary to adjust the clearance of the rubber magnet. Therefore, the disk member 6 provided with the ring member 12 with slits may be simply fixed every time the tire wheel 1 is removed, and the handling becomes easy. Therefore, anyone can easily attach the wheel sensor without requiring special skill, which can contribute to the spread of the navigation system.

The ring member 8 provided on the peripheral surface of the disk member 6 via the bearing 9 is provided so as not to rotate even when the tire wheel 1 rotates due to the weight of the box member 10 attached thereto. At this time, it is necessary that the box member 10 calculates the frictional resistance of the ring member 8 and sets the weight in advance so that the frictional resistance does not cause rotation. Alternatively, only the ring member 8 may be fixed to the brake rotor 2 and the sensor side may be fixed to the vehicle.

[0017]

[Effect of device]

 As described above, according to the present invention, the disk member provided with the slitted ring member on the peripheral surface is rotated integrally with the tire wheel, and the rotation of the tire wheel is optically adjusted according to the rotational position of the slitted ring member. Since the number of rotations is detected by detecting the wheel speed, it is not necessary to adjust the wheel sensor each time the tire wheel is removed, so handling can be simplified.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a mounting structure of a simple mounting type wheel sensor of the present invention.

FIG. 2 is a side view showing a main part of FIG.

FIG. 3 is an enlarged view showing a portion A of FIG.

FIG. 4 is a configuration diagram showing a main part of FIG.

FIG. 5 is an explanatory diagram of a function of the photo sensor in one mode of the operation of the present embodiment.

FIG. 6 is an explanatory diagram of a function of the photo sensor in another aspect of the operation of the present embodiment.

FIG. 7 is a waveform example of a detection signal obtained by the operation of this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tire wheel 2 Brake rotor 6 Disc member 8 Ring member 9 Bearing 10 Box member 11 Slit 12 Ring member with slit 13 Light emitting element 14 Light receiving element 16 FM modulator 17 Antenna

Claims (1)

[Scope of utility model registration request] 1. A slide which is detachably provided between a vehicle-side brake portion and a tire wheel portion, and has a detection portion for detecting rotation on the inner circumference and slidable on the outer circumference thereof. A plate-shaped rotating means that includes a portion and that can rotate with the rotation of the tire wheel portion around the rotation axis of the tire wheel portion, and a predetermined value even if the tire wheel portion rotates due to sliding of the sliding portion. A rotation detection unit that is provided to maintain the position and that detects the rotation of the tire wheel unit by the detection unit to obtain a detection signal, and that converts the detection signal into a transmission signal and receives the transmission signal at a predetermined position. A mounting structure for a simple mounting type wheel sensor, comprising: a detection unit that includes a transmission unit that transmits and outputs to a unit.