CN212872515U

CN212872515U - Wheel speed sensor probe

Info

Publication number: CN212872515U
Application number: CN202021703771.4U
Authority: CN
Inventors: 游瀚
Original assignee: Jiangxi Isuzu Motors Co Ltd
Current assignee: Jiangxi Isuzu Motors Co Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-04-02
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses a wheel speed sensor probe, which relates to the field of sensor probes and comprises a sensor chip and a magnetic steel electrically connected with the sensor chip; the magnetic steel is positioned at the rear end of the sensor chip. The utility model discloses a fast sensor probe of wheel make full use of spatial layout increases the magnetism ring gear before phi 4.9 mm's magnet steel replaces, and the magnet steel is located sensor chip's rear end, with both monolithic package together, has so both reduced foreign matter's interference, has also fully ensured magnetic field density's requirement. After the device is adopted, the problems of high processing difficulty and high cost of the magnetic gear ring are solved, so that the manufacturing cost of the gear ring is favorably reduced, and the signal obtained by the probe of the wheel speed sensor is better and accurate.

Description

Wheel speed sensor probe

Technical Field

The utility model relates to a sensor probe field, more specifically relates to a wheel speed sensor probe.

Background

The wheel speed sensor is used for detecting the wheel edge rotating speed and converting the wheel edge rotating speed into an electric signal to be output to a relevant controller, the principle of the wheel speed sensor is that Hall benefits are utilized, a magnetic induction line is cut in the wheel edge rotating process to generate potential difference, and a chip in the sensor is identified and then converted into constant high and low levels. However, as the working environment of the wheel edge is severe, foreign matters often enter, which affects the signal acquisition work of the sensor, and the influence of metal particles is particularly prominent, which affects the distribution and density of the magnetic field.

Therefore, effective solutions to solve the above problems need to be proposed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model discloses a fast sensor probe of wheel, it is abominable to have a foreign matter to get into, influences the problem of the signal acquisition work of sensor in the current wheel limit operational environment among the solution technique often.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a fast sensor probe of wheel, including sensor chip and with the magnet steel that the sensor chip electricity is connected, the magnet steel is located sensor chip's rear end.

Preferably, the magnetic steel is of a cylindrical structure.

Preferably, the diameter of the magnetic steel is 4.9 mm.

Preferably, the magnetic steel and the sensor chip are integrally packaged.

The utility model has the advantages that:

the utility model discloses a wheel speed sensor probe, which comprises a sensor chip and a magnetic steel electrically connected with the sensor chip; the magnetic steel is positioned at the rear end of the sensor chip.

The utility model discloses a fast sensor probe of wheel make full use of spatial layout increases the magnetism ring gear before phi 4.9 mm's magnet steel replaces, and the magnet steel is located sensor chip's rear end, with both monolithic package together, has so both reduced foreign matter's interference, has also fully ensured magnetic field density's requirement. After the device is adopted, the problems of high processing difficulty and high cost of the magnetic gear ring are solved, so that the manufacturing cost of the gear ring is favorably reduced, and the signal obtained by the probe of the wheel speed sensor is better and accurate.

Drawings

Fig. 1 is a schematic structural diagram of a wheel speed sensor probe according to an embodiment of the present invention.

In the figure:

1. a sensor chip; 2. and (5) magnetic steel.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The wheel speed sensor is a sensor for measuring the rotating speed of the wheel of the automobile, and can be arranged on the wheel and also can be arranged in a main speed reducer or a speed changer. Wheel speed information is essential for modern vehicles, and is required for vehicle dynamic control systems (VDC), vehicle Electronic Stability Program (ESP), Antilock Brake Systems (ABS), control systems of automatic transmissions, and the like. Wheel speed sensors are one of the most critical sensors in modern automobiles. Generally, commonly used wheel speed sensors are mainly: magnetoelectric wheel speed sensor, hall formula wheel speed sensor.

The Hall wheel speed sensor mainly comprises a sensing probe and a gear ring, wherein the sensing probe comprises a permanent magnet, a Hall element, an electronic circuit and the like. The sensor is manufactured by mainly applying the Hall effect principle, and has the advantages of no influence of the rotating speed on the voltage amplitude of an output signal, high frequency response, strong anti-electromagnetic wave interference capability and the like.

The principle of the Hall wheel speed sensor is as follows: the current is controlled mainly through the two ends of the semiconductor, and a magnetic field is added in the vertical direction of the Hall thin slice. The thin slice generates a potential for controlling the current and the magnetic induction intensity at two ends. The signal output is mainly carried out by magnetic induction intensity. The intensity of the input changes, so that the Hall potential pulse is generated. The internal part of the device is mainly amplified, shaped, powered and the like, and the rotation speed of the wheel is reflected through the frequency of the pulse.

Typically, at the location of the front wheel brake disc, wheel speed sensors are mounted on the hub of each wheel, respectively. Some rear wheel drive vehicles have only one electromagnetic speed sensor mounted in the final drive or transmission. The speed sensor is mounted on the final drive housing or on the transmission housing. The gear ring is arranged on an input shaft of a main speed reducer or an output shaft of a transmission and provides signals for an ABS braking system so as to control the magnitude of braking force.

As shown in fig. 1, the conventional wheel speed sensor probe is only responsible for detecting signals, and the magnetic field is derived from a magnetic wheel rim gear ring. The wheel-side gear ring in the mode has higher manufacturing cost, and the magnetic density is influenced if the wheel-side gear ring is irregular in shape, so that the accuracy of signals is directly influenced.

Therefore, the utility model provides a wheel speed sensor probe, which comprises a sensor chip 1 and a magnetic steel 2 electrically connected with the sensor chip 1; the magnetic steel 2 is positioned at the rear end of the sensor chip 1.

Wherein, among the specific implementation, sensor chip 1 is the chipset, as shown in fig. 1, the chipset passes through the plug connector at chipset both ends and is connected the both ends and the plug connector of chipset, and the middle part of chipset still overlaps the parcel piece that is equipped with a plurality of intervals and sets up, wraps up the chipset fixedly, and wherein, the parcel piece is detained by the parcel integrated circuit board and is in the same place, has detachability, and the parcel piece can be plastic. In addition, the sensor chip is a function of processing data acquired by the probe, and the process of processing the data acquired by the probe by the sensor chip is the prior art, and is not described herein again.

Preferably, the magnetic steel 2 is of a cylindrical structure.

Preferably, the diameter of the magnetic steel 2 is 4.9 mm.

Preferably, the magnetic steel 2 and the sensor chip 1 are integrally packaged.

The utility model discloses a fast sensor probe of wheel make full use of spatial layout, increase phi 4.9 mm's magnet steel and replace the magnetic ring gear before, the magnet steel is located sensor chip's rear end, with both monolithic package together, the interference of foreign matter has both been reduced like this, the requirement of magnetic field density has also fully been ensured, after adopting this device, it is big not only to have solved the magnetic ring gear processing degree of difficulty, problem with high costs, consequently, be favorable to reducing the cost of ring gear, it is better accurate still to make the signal that the fast sensor probe of wheel obtained.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A wheel speed sensor probe, characterized in that:

the sensor comprises a sensor chip (1) and magnetic steel (2) electrically connected with the sensor chip (1);

the magnetic steel (2) is located at the rear end of the sensor chip (1).

2. The wheel speed sensor probe of claim 1, wherein:

the magnetic steel (2) is of a cylindrical structure.

3. The wheel speed sensor probe of claim 2, wherein:

the diameter of the magnetic steel (2) is 4.9 mm.

4. A wheel speed sensor probe according to any one of claims 1 to 3, wherein:

the magnetic steel (2) and the sensor chip (1) are integrally packaged.