Wheel speed sensor with protection structure

Abstract

The utility model discloses a wheel speed sensor with a protection structure, which comprises a sensor shell and a mounting shell, the mounting shell comprises a mounting part and a penetrating part, the sensor shell comprises a connecting part, a clamping part and a sensing part, the sensing part is arranged in the penetrating part, a plurality of pin grooves are formed from the connecting part to the sensing part, pins are arranged in the pin grooves in a penetrating manner, and the pins are clamped in the clamping part. The sensing part is detachably connected with a control panel, the pin is connected to one end of the control panel, a mounting groove is formed in the end face of the sensing part, a chip electrically connected with the end, away from the pin, of the control panel is arranged in the mounting groove, the pin groove can well protect the pin, and meanwhile the wheel speed sensor is divided into the sensor shell and the mounting shell. The wheel speed sensor can be quickly overhauled or replaced, and the chip is arranged in the mounting groove at the end part of the sensing part, so that the chip can be protected and limited, the internal looseness and vibration of the sensor are reduced, the service life of the sensor in a severe environment is prolonged, and the reliability of the sensor in a severe environment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile electric control, especially relates to a wheel speed sensor with protection structure. BACKGROUND

[0002] The wheel speed sensor is a key component for detecting the wheel speed of the automobile, and is crucial for the anti-lock braking system and the electronic stability control system of the automobile, so as to ensure the normal operation of the two safety systems and maintain the safety of vehicle driving. Therefore, it is necessary to improve the above-mentioned defects.

[0003] The utility model discloses a kind of insulation protection's wheel speed sensor devices, including sensing framework, installation slot is set in sensing framework inside, sensing framework inside is fixedly connected with fixed plate side face, recess is set in sensing framework inside, structure hole is set in the both sides of sensing framework, two symmetric containing cavities are set in the top of sensing framework, support table is arranged on the upper surface of sensing framework, chip is arranged in sensing framework inside, gasket is arranged in sensing framework inside, limiting slot is set in gasket side face, magnetic steel is arranged in the bottom of gasket.

[0004] However, the above-mentioned wheel speed sensor device still has the following defects:

[0005] First, the pins on the outside of the sensing framework lack sealing or protective structure and are directly exposed on the outside of the sensing framework. In complex vehicle operating conditions, water vapor, oil stains and other pollutants can easily enter the inside of the sensing framework through the pin gap, which may cause the chip to short circuit due to moisture or abnormal signal transmission, and there is a risk of sensor failure.

[0006] Second, the electromagnetic isolation of the chip and the magnetic steel completely depends on the physical barrier of a single gasket. When the vehicle is in a high-frequency vibration operating condition for a long time, the gasket may produce mechanical displacement or even fall off due to material fatigue or assembly tolerance, resulting in electromagnetic shielding failure between the magnetic steel and the chip, causing magnetic field interference signal distortion problems; more seriously, it may cause circuit short circuit due to direct contact of metal parts. UTILITY MODEL CONTENTS

[0007] The utility model aims to provide a wheel speed sensor with protection structure to solve the above problems existing in the prior art.

[0008] To achieve the above object, the utility model discloses the technical scheme that adopts: a wheel speed sensor with protection structure, including sensor shell, installation shell, installation shell includes installation part and the department of passing, and sensor shell includes connecting portion, joint part and response part, and the response part is located in the department of passing, and a plurality of pin grooves are seted up in connecting portion to response part, and the pin is passed in pin groove, and the control board is detachably connected to response part, and the pin is connected to the one end of control board, and the mounting groove is seted up on the end face of response part, and the chip that is electrically connected with the one end of control board away from pin is arranged in mounting groove.

[0009] Through adopting the above technical scheme: the pin groove of sensor shell can play a good protective effect to pin, and wheel speed sensor is split into sensor shell and installation shell two parts, and wheel speed sensor can be quickly extracted from installation shell to overhaul or replace, and the chip is arranged in the mounting groove of response part end, can play certain protection and location effect to chip, reduce the looseness and vibration in sensor, improve the service life and reliability of sensor under the harsh working condition.

[0010] The wheel speed sensor with protection structure can be further provided as: the joint part is provided with an opening, and the pin is provided with a connecting bridge at the opening; a first accommodating groove is formed in the side of the joint part close to the response part, and a sealing ring is arranged in the first accommodating groove.

[0011] Through adopting the above technical scheme: the joint part is provided with an opening, which provides a larger operating space for the installation and connection of the pin, facilitating the insertion and fixation of the pin, and the connecting bridge makes the pin more stable during installation. During vehicle driving, the sensor will be subjected to various vibrations and impacts, and the connecting bridge can effectively prevent the pin from loosening due to vibration, ensuring the stability of signal transmission. At the same time, the connecting bridge can reduce the contact resistance between the pin and the control board, improving the efficiency and accuracy of signal transmission. In addition, the sealing ring in the first accommodating groove can effectively isolate the influence of the external environment on the sensor during the clamping of the sensor shell and the installation shell. During vehicle driving, the wheel speed sensor is usually exposed to dust, mud and other harsh environments. These impurities can be prevented from entering the sensor, thereby prolonging the service life of the sensor and reducing the failure rate.

[0012] The wheel speed sensor with protection structure can be further provided as: the joint part is provided with a plurality of clamping blocks at the outer periphery of the opening, the clamping blocks include sliding surfaces and abutting surfaces, the installation part is provided with clamping holes corresponding to the clamping blocks, and the installation shell and the sensor shell are clamped by the mutual cooperation of the clamping blocks and the clamping holes.

[0013] By adopting the above technical scheme: the clamping block and the clamping hole make the installation process more simple and fast. Only need to align the installation shell with the sensor shell, insert the clamping block into the clamping hole, and the installation can be completed, greatly reducing the installation time and improving the work efficiency. At the same time, this clamping method is also convenient for disassembly. When maintenance or replacement of parts is needed, only need to exert a certain force to make the clamping block separate from the clamping hole, and the installation shell and the sensor shell can be separated, reducing the maintenance difficulty. The sliding surface and the abutting surface ensure the close fit between the installation shell and the sensor shell. During the driving of the vehicle, the sensor will be subjected to various vibrations and impacts, and the cooperation of the clamping block and the clamping hole can effectively prevent loosening between the two, improving the overall structural stability of the sensor.

[0014] The wheel speed sensor with the protection structure can be further provided with a plurality of buckling blocks on the outer periphery of the connecting portion, and an abutting block between the buckling blocks on the same end surface of the connecting portion.

[0015] By adopting the above technical scheme: the buckling block can make the connection of the wheel speed sensor and other components more stable, and can effectively prevent loosening caused by vibration or impact, thereby improving the reliability of the sensor. At the same time, the abutting block can provide additional support to reduce the relative movement between components. This helps to enhance the strength of the entire wheel speed sensor structure, so that it can better withstand stress in various situations.

[0016] The wheel speed sensor with the protection structure can be further provided with a plurality of buckling blocks on the outer periphery of the connecting portion, and an abutting block between the buckling blocks on the same end surface of the connecting portion.

[0017] By adopting the above technical scheme: the control board will generate a certain amount of heat during use of the wheel speed sensor, and the heat dissipation groove increases the contact area between the control board and the air, improving the heat dissipation efficiency of the wheel speed sensor. In addition, the magnetic block is placed in the placement groove on the sensing portion, the edge of the magnetic block abuts against the inner wall of the placement groove, and the through position can ensure stable magnetic field interaction between the magnetic block and the sensing object, reduce magnetic field interference, and improve the detection accuracy of the sensor. And the heat dissipation groove, the accommodating groove and the placement groove are integrated on the sensing portion, so that the structure of the wheel speed sensor is more compact, and the installation of the wheel speed sensor in the vehicle is facilitated.

[0018] The wheel speed sensor with the protection structure can be further provided with a plurality of buckling blocks on the outer periphery of the connecting portion, and an abutting block between the buckling blocks on the same end surface of the connecting portion.

[0019] By adopting the technical scheme, when the sensor shell penetrates into the installation shell, the limiting blocks on the two sides of the sensing part are clamped into the limiting grooves in the penetrating part, the sensor can be quickly assembled, the limiting blocks and the limiting grooves can prevent the sensing part of the sensor shell from shaking in the installation shell, the collision between the chip and the installation shell is avoided, and the stability of the wheel speed sensor is improved.

[0020] The wheel speed sensor with the protection structure can be further provided with an outer support plate provided on the outer periphery of the mounting part, a positioning hole is formed in the outer support plate, a partition ring is arranged in the positioning hole, a plurality of outer gear rings are arranged on the inner periphery of the positioning hole, an inner gear ring corresponding to the outer gear ring is arranged on the outer periphery of the partition ring, and the partition ring is clamped with the positioning hole through the mutual meshing of the inner gear ring and the outer gear ring.

[0021] By adopting the technical scheme, the outer support plate can provide an additional support point for the installation of the wheel speed sensor, ensure that the sensor is more stable during installation on the vehicle, and the inner gear ring on the positioning hole of the outer support plate and the outer gear ring on the partition ring are mutually meshed, thereby enhancing the connection strength between the positioning hole and the partition ring, effectively preventing the rotation between the partition ring and the outer support plate from causing the wheel speed sensor to deviate, and improving the reliability of the wheel speed sensor.

[0022] The wheel speed sensor with the protection structure can be further provided with a second accommodating groove arranged at the connecting position of the mounting part and the penetrating part, and the second accommodating groove is provided with a rubber ring.

[0023] By adopting the technical scheme, the rubber ring has good elasticity and can absorb the vibration and impact caused by the vehicle during operation, thereby reducing the influence of external force on the sensor during vehicle driving due to road bumps, sudden braking or sharp turns.

[0024] The wheel speed sensor with the protection structure has the following advantages:

[0025] Firstly, the wheel speed sensor is divided into two parts, a plurality of pin grooves are formed in the middle of the sensor shell, and the pins are placed in the pin grooves, the sensor shell can provide good protection for the pins, and a connecting bridge is arranged between the pin parts in the opening of the clamping part, which can reduce the contact resistance between the pins and the control board and improve the efficiency and accuracy of signal transmission.

[0026] Secondly, the wheel speed sensor is divided into two parts, one part is the sensor shell, and the sensor part is arranged on the sensor shell, and the other part is the installation shell, which ensures the stability of the wheel speed sensor installation, and the sensor part can be conveniently disassembled from the installation shell, thereby greatly improving the convenience of wheel speed sensor maintenance and repair.

[0027] Third, the sensor housing is provided with a placing groove on the sensing part, and the placing groove is through the containing groove, the magnetic block is placed in the placing groove on the sensing part, the magnetic block is through the through position, the edge of the magnetic block is in contact with the inner wall of the placing groove, and the magnetic field interaction between the magnetic block and the sensing object is stable, the magnetic field interference is reduced, and the detection precision of the sensor is improved.

[0028] The utility model will be further explained in detail below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the whole structure schematic diagram of the utility model;

[0030] Figure 2 It is the explosion schematic diagram of the utility model;

[0031] Figure 3 It is the sensor housing structure schematic diagram of the utility model;

[0032] Figure 4 It is the section schematic diagram of the sensor housing of the utility model;

[0033] Figure 5 It is the explosion schematic diagram of the sensor housing of the utility model;

[0034] Figure 6 It is the structure schematic diagram of the installation housing of the utility model;

[0035] Figure 7 It is the section schematic diagram of the installation housing of the utility model;

[0036] Label annotation: sensor housing 1, connecting portion 11, buckling block 111, abutting block 112, clamping portion 12, opening 121, first containing groove 122, sealing ring 123, clamping block 124, sliding surface 125, abutting surface 126, sensing part 13, control panel 131, installation groove 132, chip 133, heat dissipation groove 134, placing groove 135, limiting block 136, pin groove 14, pin 15, connecting bridge 151, magnetic block 16, installation housing 2, installation portion 21, clamping hole 211, outer support plate 212, positioning hole 213, inner gear ring 214, spacer ring 215, outer gear ring 216, second containing groove 217, rubber ring 218, penetrating portion 22, limiting groove 221. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0038] A wheel speed sensor with a protection structure, including sensor shell 1, installation shell 2, installation shell 2 includes installation part 21 and through part 22, sensor shell 1 includes connecting part 11, clamping part 12 and sensing part 13, sensing part 13 is located in through part 22, a plurality of pin slots 14 are opened in connecting part 11 to sensing part 13, a pin 15 is through in pin slot 14, sensing part 13 is detachably connected with control panel 131, pin 15 is connected to one end of control panel 131, mounting groove 132 is opened on the end face of sensing part 13, chip 133 is arranged in mounting groove 132 and is electrically connected to the end of control panel 131 away from pin 15. The pin slot 14 of the sensor shell 1 can play a good protective role for the pin 15, and the wheel speed sensor is divided into two parts of the sensor shell 1 and the installation shell 2, the wheel speed sensor can be quickly extracted from the installation shell 2 for maintenance or replacement, and the chip 133 is arranged in the mounting groove 132 of the end part of the sensing part 13, which can play a certain protection and limiting effect on the chip 133, reduce the looseness and vibration of the sensor inside, and improve the service life and reliability of the sensor in harsh working conditions.

[0039] The clamping part 12 is provided with an opening 121, and the pin 15 is provided with a connecting bridge 151 at the opening 121; the clamping part 12 is provided with a first containing groove 122 on the side close to the sensing part 13, and the first containing groove 122 is provided with a sealing ring 123. The clamping part 12 is provided with an opening 121, which provides a larger operation space for the installation and connection of the pin 15, facilitates the insertion and fixation of the pin 15, and the connecting bridge 151 makes the pin 15 more stable during installation. During vehicle driving, the sensor will be subjected to various vibrations and impacts, the connecting bridge 151 can effectively prevent the pin 15 from loosening due to vibration, and ensure the stability of signal transmission, and the connecting bridge 151 can reduce the contact resistance between the pin 15 and the control panel 131, improve the efficiency and accuracy of signal transmission. In addition, the sealing ring 123 in the first containing groove 122 can effectively isolate the influence of the external environment on the inside of the sensor when the sensor shell 1 and the installation shell 2 are clamped. During vehicle driving, the wheel speed sensor is usually exposed to dust, mud and other harsh environments. These impurities can be prevented from entering the inside of the sensor, thereby prolonging the service life of the sensor and reducing the failure rate.

[0040] The clamping part 12 is provided with a plurality of clamping blocks 124 on the outer periphery of the opening 121, the clamping blocks 124 including sliding surfaces 125 and abutting surfaces 126, and the mounting part 21 is provided with clamping holes 211 corresponding to the clamping blocks 124, and the mounting shell 2 and the sensor shell 1 are clamped by the mutual cooperation of the clamping blocks 124 and the clamping holes 211. The clamping blocks 124 and the clamping holes 211 make the installation process simpler and faster. Only need to align the mounting shell 2 with the sensor shell 1, insert the clamping blocks 124 into the clamping holes 211, and the installation can be completed, greatly reducing the installation time and improving the work efficiency. At the same time, this clamping method is also convenient for disassembly. When it is necessary to repair or replace parts, only need to exert a certain force to make the clamping blocks 124 separate from the clamping holes 211, and the mounting shell 2 and the sensor shell 1 can be separated, reducing the difficulty of maintenance. The sliding surfaces 125 and the abutting surfaces 126 ensure the close cooperation between the mounting shell 2 and the sensor shell 1. During the driving of the vehicle, the sensor will be subjected to various vibrations and impacts, and the cooperation of the clamping blocks 124 and the clamping holes 211 can effectively prevent loosening between the two, improving the overall structural stability of the sensor.

[0041] The connecting part 11 is provided with a plurality of buckling blocks 111 on the outer periphery, and the buckling blocks 111 on the same end surface of the connecting part 11 are provided with abutting blocks 112. The buckling blocks 111 can make the connection of the wheel speed sensor and other components more stable, and can effectively prevent loosening caused by vibration or impact, thereby improving the reliability of the sensor. At the same time, the abutting blocks 112 can provide additional support to reduce the relative movement between components. This helps to enhance the strength of the overall structure of the wheel speed sensor, so that it can better withstand the stress under various working conditions.

[0042] The induction part 13 is provided with a heat dissipation groove 134 below the control panel 131, and a placement groove 135 is provided on the side of the induction part 13 away from the control panel 131, and a magnetic block 16 is arranged in the placement groove 135, and the placement groove 135 is communicated with the accommodating groove. The control panel 131 will generate a certain amount of heat during use of the wheel speed sensor, and the heat dissipation groove 134 increases the contact area between the control panel 131 and the air, improving the heat dissipation efficiency of the wheel speed sensor. In addition, the magnetic block 16 is placed in the placement groove 135 on the induction part 13, and the placement groove 135 is communicated with the accommodating groove, the edge of the magnetic block 16 abuts against the inner wall of the placement groove 135, and through the through position, the magnetic field interaction between the magnetic block 16 and the sensing object can be ensured to be stable, the magnetic field interference is reduced, and the detection accuracy of the sensor is improved. And the heat dissipation groove 134, the accommodating groove and the placement groove 135 are integrated on the induction part 13, and the structure of the wheel speed sensor is more compact, which is convenient for the installation of the wheel speed sensor in the vehicle.

[0043] The limiting block 136 is arranged on both sides of the inductive part 13, and the limiting slot 221 is arranged in the penetrating part 22 and matched with the limiting block 136, the inductive part 13 is clamped into the limiting slot 221 through the limiting block 136 to prevent the sensor shell 1 from shaking relative to the mounting shell 2. When the sensor shell 1 penetrates into the mounting shell 2, the sensor can be quickly assembled by clamping the limiting block 136 on both sides of the inductive part 13 into the limiting slot 221 in the penetrating part 22, and the limiting block 136 and the limiting slot 221 can prevent the inductive part 13 of the sensor shell 1 from shaking in the mounting shell 2, avoid the chip 133 from colliding with the mounting shell 2, and improve the stability of the wheel speed sensor.

[0044] The outer support plate 212 is arranged on the outer periphery of the mounting part 21, the positioning hole 213 is arranged on the outer support plate 212, the spacer 215 is arranged in the positioning hole 213, the rubber ring 218214 is arranged on the inner periphery of the positioning hole 213, the outer gear ring 216 is arranged on the outer periphery of the spacer 215 and matched with the outer gear ring 216, and the spacer 215 is clamped with the positioning hole 213 through the mutual meshing of the rubber ring 218214 and the outer gear ring 216. The outer support plate 212 can provide an additional support point for the installation of the wheel speed sensor, ensure that the sensor is more stable during installation on the vehicle, and the mutual meshing of the rubber ring 218214 on the positioning hole 213 and the outer gear ring 216 on the spacer 215 enhances the connection strength between the positioning hole 213 and the spacer 215, effectively prevents the spacer 215 from rotating relative to the outer support plate 212 to cause the wheel speed sensor to deviate, and improves the reliability of the wheel speed sensor.

[0045] The second accommodating groove 217 is arranged at the connecting position of the mounting part 21 and the penetrating part 22 of the mounting shell 2, and the rubber ring 218 is arranged in the second accommodating groove 217. The rubber ring 218 has good elasticity and can absorb the vibration and impact generated during the operation of the vehicle, thereby reducing the influence of external force on the sensor during the driving of the vehicle due to road bumps, sudden braking or sharp turns.

[0046] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A wheel speed sensor having a protective structure, comprising a sensor housing, a mounting housing including a mounting portion and a through portion, characterized by: The sensor shell comprises a connecting part, a clamping part and a sensing part, the sensing part is arranged in the penetrating part, a plurality of pin grooves are arranged in the connecting part to the sensing part, pins are arranged in the pin grooves, the sensing part is detachably connected with a control board, the pins are connected to one end of the control board, a mounting groove is arranged on the end face of the sensing part, and a chip electrically connected to the end of the control board away from the pins is arranged in the mounting groove.

2. The wheel speed sensor with protective structure of claim 1, wherein: The clamping part is provided with an opening, and the pins are provided with a connecting bridge at the opening; a first containing groove is arranged on the side of the clamping part close to the sensing part, and a sealing ring is arranged in the first containing groove.

3. The wheel speed sensor with protective structure of claim 2, wherein: A plurality of clamping blocks are arranged on the outer periphery of the clamping part, the clamping blocks comprise sliding surfaces and abutting surfaces, the mounting part is provided with clamping holes corresponding to the clamping blocks, and the mounting shell and the sensor shell are clamped by the mutual cooperation of the clamping blocks and the clamping holes.

4. The wheel speed sensor with protective structure of claim 3, wherein: A plurality of buckling blocks are arranged on the outer periphery of the connecting part, and an abutting block is arranged between the buckling blocks on the same end face of the connecting part.

5. The wheel speed sensor with protective structure of claim 1, wherein: A heat dissipation groove is arranged below the control board of the sensing part, a placing groove is arranged on the side of the sensing part away from the control board, a magnetic block is arranged in the placing groove, and the placing groove is communicated with the containing groove.

6. The wheel speed sensor with protective structure of claim 5, wherein: Limiting blocks are arranged on both sides of the circuit board of the sensing part, limiting grooves matched with the limiting blocks are arranged in the penetrating part, and the sensing part is clamped into the limiting grooves by the limiting blocks to prevent the sensor shell from shaking relative to the mounting shell.

7. The wheel speed sensor with protective structure of claim 6, wherein: An outer supporting plate is arranged on the outer periphery of the mounting part, a positioning hole is arranged on the outer supporting plate, a partition ring is arranged in the positioning hole, a plurality of outer tooth rings are arranged on the inner periphery of the positioning hole, an inner tooth ring corresponding to the outer tooth ring is arranged on the outer periphery of the partition ring, and the partition ring is clamped with the positioning hole by the mutual engagement of the inner tooth ring and the outer tooth ring.

8. The wheel speed sensor with protective structure of claim 7, wherein: A second containing groove is arranged at the connecting part of the mounting part and the penetrating part of the mounting shell, and a rubber ring is arranged in the second containing groove.

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