CN219122231U

CN219122231U - High-temperature-resistant ABS wheel speed sensor

Info

Publication number: CN219122231U
Application number: CN202222564093.3U
Authority: CN
Inventors: 罗方; 龚平; 周俊; 黄志亮; 高佳超
Original assignee: Paidesen Jingshan Auto Parts Co ltd
Current assignee: Paidesen Jingshan Auto Parts Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-06-02
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to a high-temperature-resistant ABS wheel speed sensor, which comprises a shell, wherein a Hall chip is arranged in the end part of the shell, which is arranged on a tooth ring of a wheel, a magnet is arranged on one side of the Hall chip, which is far away from the end part, an aerogel sheath is arranged in the shell, which is close to the outer surface, and the aerogel sheath at least covers the Hall chip and the magnet. According to the utility model, the Hall chip and the magnet part can be effectively isolated from the outside by coating the aerogel sheath, so that the aerogel has a good heat insulation protection function, the high temperature resistance of the product can be improved to more than 250 ℃, and the installation requirement of a commercial vehicle in a high temperature environment can be met; the designed mark can directly identify the left wheel speed sensor and the right wheel speed sensor from the appearance of the product, thereby preventing errors during assembly; the limiting of the product installation deflection angle can be realized through the outer support plate positioning holes, the accurate installation deflection angle of the wheel speed sensor can be positioned, and the product installation can be conveniently and accurately realized.

Description

High-temperature-resistant ABS wheel speed sensor

Technical Field

The utility model relates to the technical field of sensors, in particular to a high-temperature-resistant ABS wheel speed sensor.

Background

The Hall type wheel speed sensor has the advantages of high sensitivity, small volume, strong anti-interference capability and the like, and is widely applied to products such as automobile wheel speed sensors and the like. However, the Hall type wheel speed sensor is mainly applied to the field of passenger vehicles for a long time, and the key reason is that the temperature resistant bearing range of the Hall chip is between minus 40 ℃ and +150 ℃, and the wheel speed sensor is installed near a brake due to the fact that the temperature can be higher when the commercial vehicle brakes, and the requirement can be met only by products with the temperature resistant capacity of +250 ℃. However, the existing wheel speed sensor cannot meet the requirement, often causes the service life of the product to be not long, and often needs to be replaced.

In addition, the intelligent ABS wheel speed sensor can identify the forward and reverse rotation of the wheel, and is widely applied to vehicles. When the intelligent ABS wheel speed sensor recognizes the rotation direction of the wheels, the coaxial left wheel and the coaxial right wheel require the same signals to be output to the controller, the left wheel rotates clockwise, the right wheel rotates anticlockwise, the arrangement directions of the Hall chips inside the left wheel and the right wheel are opposite to each other in order to ensure that the output signals of the left wheel and the right wheel are the same, and the Hall chips are packaged inside a product, so that the arrangement conditions of the chips cannot be distinguished from the appearance of the product. However, in the assembly process of common products, the installation direction is not easy to accurately distinguish from the appearance, assembly errors are easy to cause, and reworking operation is troublesome.

Disclosure of Invention

The utility model aims to provide a high-temperature-resistant ABS wheel speed sensor which at least can solve part of defects in the prior art.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions: the utility model provides a high temperature resistant ABS wheel speed sensor, includes the casing, be equipped with the hall chip in the tip that the casing was installed on the ring gear of wheel, the hall chip is kept away from one side of tip is installed magnet, the inside aerogel sheath that is close to surface department of casing is equipped with, the aerogel sheath at least the package cover hall chip with magnet.

Further, an outer support plate is arranged at the other end of the shell, the outer support plate protrudes outwards from the shell, and an offset angle positioning hole is formed in the outer support plate.

Further, a framework is arranged in the shell, and the framework is provided with a mounting position for mounting the magnet and the Hall chip.

Further, the framework is arranged along the length direction of the shell, one side, close to the wheels, of the framework is provided with the installation position, the installation position is an installation chamber which is close to one end opening of the wheels, and the magnet is arranged in the installation chamber.

Further, the hall chip comprises a hall element, and the hall element is arranged at the opening of the mounting chamber.

Further, the Hall chip further comprises a positive plate and a signal pin which are arranged side by side, a capacitor is arranged on the positive plate and the signal pin, the capacitor spans across the positive plate and the signal pin, and the positive plate and the signal pin are attached to the framework.

Further, the Hall chip comprises a cable, and the cable is electrically connected with the Hall chip.

Further, the cable is electrically connected with the Hall chip through a conductive structure, one part of the conductive structure stretches into the framework, and the other part of the conductive structure is arranged outside the framework and is electrically connected with the cable.

Further, an O-shaped sealing ring is sleeved in the shell close to the outer support plate.

Further, marks for indicating the left wheel speed sensor and the right wheel speed sensor are arranged on the shell.

Compared with the prior art, the utility model has the beneficial effects that:

1. through cladding round aerogel sheath, can effectively keep apart hall chip and magnet part and external world, the aerogel has played fine thermal-insulated protect function at this moment, and the high temperature resistant ability of product can promote more than 250 ℃, can satisfy the installation demand under the commercial car high temperature environment.

2. The designed mark can directly identify the left wheel speed sensor and the right wheel speed sensor from the appearance of the product, thereby preventing errors during assembly.

3. The limiting of the product installation deflection angle can be realized through the outer support plate positioning holes, the accurate installation deflection angle of the wheel speed sensor can be positioned, and the product installation can be conveniently and accurately realized.

Drawings

FIG. 1 is a schematic diagram of a high temperature resistant ABS wheel speed sensor (left wheel speed sensor) provided by an embodiment of the utility model;

FIG. 2 is a schematic diagram of a high temperature resistant ABS wheel speed sensor (right wheel speed sensor) provided by an embodiment of the utility model;

FIG. 3 is a schematic diagram of a relative installation position of a high temperature resistant ABS wheel speed sensor and a gear ring according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a high temperature resistant ABS wheel speed sensor provided by an embodiment of the utility model;

FIG. 5 is a schematic diagram of the relative mounting positions of a high temperature resistant ABS wheel speed sensor and a wheel (illustrating the relationship between a left wheel speed sensor and a left wheel) provided by an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a relative installation position of a high temperature resistant ABS wheel speed sensor and a wheel (illustrating a relationship between a right wheel speed sensor and a right wheel) provided by an embodiment of the present utility model;

FIG. 7 is an assembly schematic diagram of a cable, a skeleton, a Hall chip and a conductive structure of the high-temperature-resistant ABS wheel speed sensor provided by the embodiment of the utility model;

FIG. 8 is an enlarged partial schematic view of FIG. 7;

FIG. 9 is an assembly schematic diagram of a conductive structure, a Hall chip and a magnet of a high temperature resistant ABS wheel speed sensor according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of a skeleton of a high temperature resistant ABS wheel speed sensor provided by an embodiment of the utility model;

FIG. 11 is a schematic illustration of a high temperature resistant ABS wheel speed sensor according to an embodiment of the present utility model with a housing removed;

in the reference numerals: 1-a high-temperature-resistant ABS wheel speed sensor; 10-a housing; 11-Hall chips; 110-block structure; 111-a positive plate; 112-signal pins; 113-capacitance; 114-a first hall element; 115-a second hall element; 12-magnet; 13-an aerogel jacket; 14-an outer support plate; 140-deflection angle positioning holes; 141-a bushing; 15-a framework; 150-installation room; 151-opening; 152-dividing blocks; 16-cable wires; 17-conductive structures; 170-grooves; an 18-O-shaped sealing ring; 19-identification; 20-positioning holes; 21-appearance plastic coating; 2-gear ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 11, an embodiment of the utility model provides a high temperature resistant ABS wheel speed sensor 1, which comprises a housing 10, wherein a hall chip 11 is arranged in an end portion of the housing 10, which is mounted on a gear ring 2 of a wheel, a magnet 12 is mounted on one side of the hall chip 11, which is far away from the end portion, an aerogel sheath 13 is arranged in the housing 10, which is close to an outer surface, and the aerogel sheath 13 at least covers the hall chip 11 and the magnet 12. In this embodiment, through cladding round aerogel sheath 13, can effectively keep apart hall chip 11 and magnet 12 part and external world, the aerogel has played fine thermal-insulated protect function at this moment, and the high temperature resistant ability of product can promote to more than 250 ℃, can satisfy the installation demand under the commercial car high temperature environment. Specifically, the hall chip 11 and the magnet 12 are all mature products purchased directly in the market, are arranged at one end, close to the wheel, of the product, when the gear ring 2 on the wheel rotates from the sensor head, the hall chip 11 outputs a square wave signal under the action of the gear ring 2 and the magnet 12, and the rotation speed of the wheel can be read through the ECU in the vehicle, which is the prior art, and is not described too much here. Because the temperature of the wheel edge is higher, the aerogel sheath 13 is designed to protect the Hall chip 11 and the magnet 12, and the service life of the product is prolonged. Preferably, the shell 10 is a stainless steel jacket, the shell 10 is internally provided with an appearance plastic coating 21, and when the shell 10 is installed, the shell 10 is jacked into the positioning hole 20 of the appearance plastic coating 21 in a riveting mode so as to fix the shell 10.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 1 to 11, an outer support plate 14 is disposed at the other end of the housing 10, the outer support plate 14 protrudes out of the housing 10, and an offset angle positioning hole 140 is disposed on the outer support plate 14. In this embodiment, the limitation of the product installation deflection angle can be realized by the positioning holes 20 of the outer support plate 14, the accurate installation deflection angle of the wheel speed sensor can be positioned, and the installation of the product can be conveniently and accurately realized. The gear ring 2 is provided with a mounting hole, and a locating pin is mounted through threads and inserted into the deflection angle locating hole 140, so that the product and the gear ring 2 are positioned and mounted. Preferably, the angular positioning hole 140 has a bushing 141 therein to facilitate its assembly with a positioning pin.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 1 to 11, a framework 15 is disposed in the housing 10, and the framework 15 has a mounting position for mounting the magnet 12 and the hall chip 11. In this embodiment, the magnet 12 and the hall chip 11 are mounted by the framework 15, so that they can be positioned on one hand, and a certain protection effect can be achieved on the other hand, so that the service life of the hall chip is prolonged. Preferably, referring to fig. 7 to 10, the frame 15 is disposed along the length direction of the housing 10, and the frame 15 has the mounting position at a side near the wheel, the mounting position is a mounting chamber 150 near an end opening 151 of the wheel, and the magnet 12 is disposed in the mounting chamber 150. The hall chip 11 includes a hall element provided at an opening 151 of the mounting chamber 150. A mounting chamber 150 is designed to accommodate the block-shaped magnet 12, and then hall elements, two of which are defined as a first hall element 114 and a second hall element 115, respectively, are integrated into the block-shaped structure 110, are mounted at the opening 151 to facilitate the rotation of the sensing ring gear 2.

With further optimization of the above scheme, referring to fig. 9, the hall chip 11 further includes a positive plate 111 and a signal pin 112 that are disposed side by side, a capacitor 113 is disposed on the positive plate 111 and the signal pin 112, the capacitor 113 spans across the positive plate 111 and the signal pin 112, and the positive plate 111 and the signal pin 112 are attached to the frame 15. In the present embodiment, the positive electrode tab 111, the signal pin 112, and the capacitor 113 are conventional elements of the hall chip 11. Preferably, the frame 15 is provided with a separation block 152 protruding from a gap between the positive electrode sheet 111 and the signal pin 112, so that the positive electrode sheet 111 and the signal pin 112 can be separated.

As an optimization scheme of the embodiment of the present utility model, please refer to fig. 1 to 11, further include a cable 16, where the cable 16 is electrically connected to the hall chip 11. In this embodiment, one end of the cable 16 is connected to the hall chip 11, and the other end is connected to the vehicle-mounted ECU.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 1 to 11, the cable 16 is electrically connected to the hall chip 11 through a conductive structure 17, and a part of the conductive structure 17 extends into the frame 15, and another part is outside the frame 15 and is electrically connected to the cable 16. In this embodiment, a conductive structure 17 may be designed to facilitate the connection of the cable 16 and the hall chip 11. The conductive structure 17 also has two legs, which can respectively correspond to the two core wires of the cable 16, and a positive electrode plate 111 and a signal leg 112 of the hall chip 11. Preferably, the conductive structure 17 has two grooves 170 for respectively binding two core wires of the cable 16, and the two grooves 170 can bind the two core wires, so as to avoid unstable signals caused by random displacement of the two core wires.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 1 to 11, an O-ring 18 is sleeved in the housing 10 near the outer support plate 14. In the present embodiment, the O-ring 18 is provided to provide a sealing effect.

As an optimization scheme of the embodiment of the present utility model, referring to fig. 1 to 11, a mark 19 for indicating left and right wheel speed sensors is provided on the housing 10. In the present embodiment, whether the present product is a left wheel speed sensor or a right wheel speed sensor is indicated by the words "left" and "right" of the reference numeral 19, wherein the left wheel is rotated clockwise as indicated by the arrow shown in fig. 5, and wherein the right wheel is rotated counterclockwise as indicated by the arrow shown in fig. 6. Preventing errors during assembly.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high temperature resistant ABS wheel speed sensor, includes casing, its characterized in that: the shell is arranged in the end part of the ring gear of the wheel, a magnet is arranged on one side, far away from the end part, of the Hall chip, an aerogel sheath is arranged in the shell, close to the outer surface, and at least the Hall chip and the magnet are covered by the aerogel sheath.

2. A high temperature resistant ABS wheel speed sensor according to claim 1 wherein: an outer support plate is arranged at the other end of the shell, the outer support plate protrudes outwards from the shell, and an offset angle positioning hole is formed in the outer support plate.

3. A high temperature resistant ABS wheel speed sensor according to claim 1 wherein: the shell is internally provided with a framework, and the framework is provided with a mounting position for mounting the magnet and the Hall chip.

4. A high temperature resistant ABS wheel speed sensor according to claim 3 wherein: the framework is arranged along the length direction of the shell, one side, close to the wheel, of the framework is provided with the installation position, the installation position is an installation chamber which is close to one end of the wheel and is open, and the magnet is arranged in the installation chamber.

5. A high temperature resistant ABS wheel speed sensor according to claim 4 wherein: the Hall chip comprises a Hall element, and the Hall element is arranged at the opening of the mounting chamber.

6. A high temperature resistant ABS wheel speed sensor according to claim 4 wherein: the Hall chip further comprises a positive plate and a signal pin which are arranged side by side, a capacitor is arranged on the positive plate and the signal pin, the capacitor spans across the positive plate and the signal pin, and the positive plate and the signal pin are attached to the framework.

7. A high temperature resistant ABS wheel speed sensor according to claim 3 wherein: the Hall chip is characterized by further comprising a cable, wherein the cable is electrically connected with the Hall chip.

8. A high temperature resistant ABS wheel speed sensor according to claim 7 wherein: the cable is electrically connected with the Hall chip through a conductive structure, one part of the conductive structure stretches into the framework, and the other part of the conductive structure is arranged outside the framework and is electrically connected with the cable.

9. A high temperature resistant ABS wheel speed sensor according to claim 2 wherein: an O-shaped sealing ring is sleeved in the shell close to the outer support plate.

10. A high temperature resistant ABS wheel speed sensor according to claim 1 wherein: the shell is provided with a mark for indicating the left wheel speed sensor and the right wheel speed sensor.