Insulation protection wheel speed sensor device

Abstract

The utility model discloses an insulation protection wheel speed sensor device which comprises a sensing framework, a mounting groove is formed in the sensing framework, the interior of the sensing framework is fixedly connected with the side face of a fixing plate, a groove is formed in the sensing framework, structural holes are formed in the two sides of the sensing framework, and two symmetrical containing cavities are formed in the top of the sensing framework. A supporting table is arranged on the upper surface of the sensing framework, a chip is arranged in the sensing framework, a gasket is arranged in the sensing framework, a limiting groove is formed in the side face of the gasket, and magnetic steel is arranged at the bottom of the gasket. Through the sensing framework, the mounting groove, the fixing plate and the gasket, the wheel speed sensor is prevented from deviating or loosening, the problem that signals are unstable due to deviation of the magnetic steel is solved, the chip and the magnetic steel can be separated on the two sides of the bending plate in an insulated mode through the insulation effect of the fixing plate and the gasket, and the reliability of the wheel speed sensor is improved. Therefore, the situation that the magnetic steel and the chip are mutually conducted in the use process of the wheel speed sensor is avoided, and normal use of the wheel speed sensor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel speed sensors, in particular to an insulation-protected wheel speed sensor device. Background Art

[0002] Wheel speed sensors are sensors used to measure the speed of a car's wheels. In order to prevent the wheels from locking during driving, the control program must know the speed of a single wheel. Wheel speed sensors mainly collect the speed of the car to determine whether the car is slipping. They are generally installed on the hub of each wheel. Once the sensor is damaged, the ABS will fail, so the sensor is very important for the safe use of the car.

[0003] In the prior art, the wheel speed sensor is mostly set in an injection-molded shell, in which a sensor frame is set, and the magnet and chip are fixed on the sensor frame. However, during the driving process of the car, the car will generate vibration and pressure, and the magnet will be offset, resulting in unstable frequency and amplitude of the output signal wave. The offset of the magnet will also accelerate wear, and under this influence, the magnet and chip inside the sensor end will be mutually conductive, and even cause internal deformation or functional failure. Utility Model Content

[0004] The utility model aims to provide a wheel speed sensor device with insulation protection to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an insulating and protected wheel speed sensor device, comprising a sensor frame, an installation groove is provided inside the sensor frame, the inside of the sensor frame is fixedly connected to the side of a fixed plate, a groove is provided inside the sensor frame, structural holes are provided on both sides of the sensor frame, two symmetrical accommodating cavities are provided on the top of the sensor frame, a support platform is provided on the upper surface of the sensor frame, a chip is provided inside the sensor frame, a gasket is provided inside the sensor frame, a limiting groove is provided on the side of the gasket, a magnetic steel is provided at the bottom of the gasket, a bending plate is provided on the top of the magnetic steel, the bending plate is fixedly connected to the bump, and the bending plate is fixedly connected to one end of the pin.

[0006] Preferably, a matching groove is provided at one end of the sensor frame, and the chip is movably connected to the sensor frame through the matching groove.

[0007] Preferably, the top of the fixing plate is fixedly connected to the limiting protrusion, and the fixing plate is made of insulating rubber.

[0008] Preferably, the groove is movably engaged with the protrusion.

[0009] Preferably, the limiting groove is an arc-shaped groove, and the inner wall of the limiting groove abuts against the outer side of the magnetic steel.

[0010] Preferably, the bending plate is an L-shaped plate, and the chip and the magnetic steel are respectively located on two sides of the bending plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model can limit and fix the magnetic steel inside the mounting groove by arranging the sensor frame, the mounting groove, the fixing plate and the gasket, so as to prevent the wheel speed sensor from being offset or loosened due to vibration or pressure during the driving of the car, solve the problem of unstable signals caused by the offset of the magnetic steel, and avoid the wear caused by the movement of the magnetic steel. In addition, the insulating effect of the fixing plate itself and the gasket can be used to insulate and separate the chip and the magnetic steel on both sides of the bending plate, thereby preventing the magnetic steel and the chip from being connected to each other during the use of the wheel speed sensor, thereby ensuring the normal use of the wheel speed sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the sensor skeleton structure of the utility model;

[0015] Figure 3 It is an exploded view of part of the structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the bending plate connection structure of the utility model;

[0017] Figure 5 It is a schematic diagram of partial structural connection of the utility model;

[0018] Figure 6 This is a schematic diagram of the gasket structure of the utility model.

[0019] In the figure: 1. sensor frame; 10. mounting groove; 11. fixing plate; 12. groove; 13. structural hole; 14. accommodating cavity; 15. support platform; 2. chip; 3. gasket; 31. limiting groove; 4. magnetic steel; 5. bending plate; 6. bump; 7. pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-6The utility model provides a technical solution: an insulating and protective wheel speed sensor device, including a sensor frame 1, a mounting groove 10 is provided inside the sensor frame 1, the mounting groove 10 is an arc groove, the mounting groove 10 is movably connected with the magnetic steel 4, the inside of the sensor frame 1 is bonded and fixed to the side of the fixing plate 11, the fixing plate 11 is rectangular, the fixing plate 11 is made of insulating rubber material, the top of the fixing plate 11 is fixedly connected with the insulating protrusion, a corresponding matching groove is provided in the center of the bending plate 5, the bending plate 5 is movably connected with the insulating protrusion through the matching groove, and the sensor frame 1 is provided inside The groove 12 is movably connected with the protrusion 6, structural holes 13 are provided on both sides of the sensor frame 1, two symmetrical accommodating cavities 14 are provided on the top of the sensor frame 1, a support platform 15 is provided on the upper surface of the sensor frame 1, the inside of the sensor frame 1 is movably connected with the chip 2 through the matching groove, the side of the fixing plate 11 is fitted with the gasket 3, and a limiting groove 31 is provided on the side of the gasket 3, a magnetic steel 4 is provided at the bottom of the gasket 3, and the magnetic steel 4 is movably connected with the installation groove 10, a bending plate 5 is provided on the top of the magnetic steel 4, the bending plate 5 is welded and fixed to the protrusion 6, and the bending plate 5 is welded and fixed to one end of the pin 7,

[0022] A matching groove is set at one end of the sensor skeleton 1, and the chip 2 is movably connected with the sensor skeleton 1 through the matching groove. The sensor skeleton 1 includes a sensing part and a fixing part. The sensor elements are all arranged in the sensing part to sense the signal; the fixing part is used to be received and fixed by the injection-molded shell, and the magnetic steel 4 is installed in the installation groove 10 to achieve the limit and fixation of the magnetic steel 4, and the gasket 3 is installed in the sensor skeleton 1 and fits with the side of the fixing plate 11, and is stuck on the top of the magnetic steel 4, limiting the radial runout of the magnetic steel 4, thereby solving the problem that the magnetic lines of force generated by the magnetic steel 4 cannot penetrate the Hall element directly, resulting in unstable Hall voltage, and further causing unstable square wave frequency and amplitude. In addition, it also avoids the wear between the magnetic steel 4 and the internal components. The gasket 3 can effectively enhance the insulation protection effect, thereby avoiding conduction between the chip 2 and the magnetic steel 4. The top of the fixing plate 11 is fixedly connected to the limiting protrusion. The fixing plate 11 is made of insulating rubber. The limiting groove 31 is an arc groove. The inner wall of the limiting groove 31 abuts against the outer side of the magnetic steel 4. The bending plate 5 is an L-shaped plate. The chip 2 and the magnetic steel 4 are respectively located on both sides of the bending plate 5. The structural hole 13 is formed by the pins when the sensor skeleton 1 is injection molded. The high-temperature PA material can enter the hole after secondary injection molding to strengthen the overall fixation of the sensor skeleton 1. The chip 2 is a wheel speed information collection component in the wheel speed sensor. The chip 2 support part is roughly flat, and a protrusion is provided in the middle to limit the movement of the chip 2. A block is provided on the top to protect the sensing part of the chip 2.

[0023] Working principle: When in use, place 4 inside the installation groove 10, then place the gasket 3 above the magnet 4, and clamp the magnet 4 in the installation groove 10 with the cooperation of the fixing plate 11 and the limit groove 31, so as to avoid the displacement of the magnet 4 during the driving of the car, ensure the stability of the output signal wave frequency and amplitude of the chip 2, and fix the magnet 4 to avoid wear and tear, thereby extending the service life of the whole device. Then place the bump 6 inside the groove 12, and place the chip 2 in the corresponding card slot of the sensor skeleton 1. The chip 2 and the magnet 4 are isolated and fixed from each other by the gasket 3 and the bending plate 5, so as to prevent the magnet and the chip 2 from contacting each other when the wheel speed sensor is working. In addition, a partition plate is arranged on the support platform 15, and the overall structure is in an I-shape, so that it is convenient to separate the pins 7 in parallel to ensure the stability of signal transmission.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheel speed sensor device with insulation protection, comprising a sensor frame (1), characterized in that: The sensor frame (1) has a mounting groove (10) disposed inside, the sensor frame (1) is fixedly connected to the side of the fixing plate (11) inside, a groove (12) disposed inside, structural holes (13) disposed on both sides of the sensor frame (1), two symmetrical accommodating cavities (14) disposed on the top of the sensor frame (1), a support platform (15) disposed on the upper surface of the sensor frame (1), a chip (2) disposed inside the sensor frame (1), a gasket (3) disposed inside the sensor frame (1), a limiting groove (31) disposed on the side of the gasket (3), a magnetic steel (4) disposed at the bottom of the gasket (3), a bending plate (5) disposed on the top of the magnetic steel (4), the bending plate (5) fixedly connected to the protrusion (6), and the bending plate (5) fixedly connected to one end of the pin (7).

2. The wheel speed sensor device with insulation protection according to claim 1, characterized in that: A matching groove is provided at one end of the sensor frame (1), and the chip (2) is movably engaged with the sensor frame (1) via the matching groove.

3. The wheel speed sensor device with insulation protection according to claim 1, characterized in that: The top of the fixing plate (11) is fixedly connected to the limiting protrusion, and the fixing plate (11) is made of insulating rubber.

4. The wheel speed sensor device with insulation protection according to claim 1, characterized in that: The groove (12) is movably engaged with the protrusion (6).

5. The wheel speed sensor device with insulation protection according to claim 1, characterized in that: The limiting groove (31) is an arc-shaped groove, and the inner wall of the limiting groove (31) abuts against the outer side of the magnetic steel (4).

6. The wheel speed sensor device with insulation protection according to claim 1, characterized in that: The bending plate (5) is an L-shaped plate, and the chip (2) and the magnetic steel (4) are respectively located on two sides of the bending plate (5).

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