Wheel speed sensor

Abstract

The utility model discloses a wheel speed sensor which comprises a sensor body, the sensor body penetrates through a hub shell and is close to a target magnetic wheel at the inner side end, an induction chip is arranged in the sensor body and comprises an induction main body, and the induction main body is close to the target magnetic wheel. One side, close to the target magnetic wheel, of the inner side end of the sensor body is provided with an inclined plane structure parallel to the surface of the target magnetic wheel, the outer surface of the inclined plane structure is an induction surface of the sensor body, and the induction body directly faces the inclined plane structure and is parallel to the inclined plane structure. According to the wheel speed sensor provided by the invention, the sensing distance between the sensing surface of the sensor and the target magnetic wheel can be well controlled, so that the sensing distance control of the sensor is more accurate, and the product performance of the sensor is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor equipment technical field especially relates to wheel speed sensor. BACKGROUND

[0002] Wheel speed sensor is mainly applied to the automobile industry, is the automobile anti -lock braking system (ABS), electronic stability program (ESP), traction control system (TCS) etc. Active safety system key components, provides wheel speed signal, helps the system to judge the wheel state, prevents the wheel lock, skidding, keeps the vehicle control stability and driving safety.

[0003] In prior art, the sensing surface of the wheel speed sensor and the flange mounting surface are vertically arranged, when the wheel speed sensor is installed on the shell, a certain angle will be formed between the sensor sensing surface and the target magnetic wheel surface, so that if the sensor and the target magnetic wheel are too close, the risk of installation interference will easily occur, and if too far, the sensor sensing distance will not meet the specification requirements, that is, the sensor sensing distance will easily exceed, thereby reducing the performance of the sensor, in the extreme case, the wheel speed signal cannot be output, further leading to vehicle fault code, affecting normal driving of the vehicle. SUMMARY

[0004] The wheel speed sensor provided by the embodiment of the application can ensure that the sensing distance between the sensing surface of the sensor and the target magnetic wheel is well controlled, so that the sensing distance control of the sensor is more accurate, and the product performance of the sensor is more stable.

[0005] The wheel speed sensor provided by the embodiment of the application comprises a sensor body, the sensor body is penetrated through a hub shell and is close to a target magnetic wheel at an inner side end, an inductive chip is arranged in the sensor body, the inductive chip comprises an inductive main body, the inductive main body is close to the target magnetic wheel, an inclined surface structure parallel to the surface of the target magnetic wheel is arranged on the inner side end of the sensor body on the side close to the target magnetic wheel, the outer surface of the inclined surface structure is the sensing surface of the sensor body, the inductive main body is directly opposite to the inclined surface structure and parallel to the inclined surface structure.

[0006] In a possible implementation manner, the inductive chip is provided with a pin, and a chip support with a terminal is further arranged in the sensor body, and the chip support with the terminal is connected to the inductive main body through the pin.

[0007] In a possible implementation manner, the pin is two, and the chip support with the terminal is provided with two terminals.

[0008] In a possible implementation, the pin is bent at a predetermined angle near one end of the induction body; the pin comprises a first connecting portion and a second connecting portion, with the other end of the first connecting portion connected to the induction body, and the other end of the second connecting portion connected to the chip support with the terminal, and parallel to the surface of the sensor body.

[0009] In a possible implementation, a support ring is sleeved on the sensor body, and the support ring is connected to the hub shell through a fastener, and the support ring is attached to the outer surface of the hub shell when the sensor body is installed in place.

[0010] Beneficial effects: Compared with the prior art, the wheel speed sensor provided by the application sets a slope structure parallel to the surface of the target magnetic wheel on the side of one end of the sensor body close to the target magnetic wheel, and the induction body of the induction chip is directly opposite the slope structure and parallel to the slope structure, so that when the sensor body is installed in place, the induction chip can be parallel to the surface of the target magnetic wheel, so that the induction distance of the induction chip from the target magnetic wheel can be accurately controlled within the specification requirements of the induction chip, and the product performance of the sensor is more stable, and no additional cost is increased.

[0011] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 A perspective structural schematic diagram of the wheel speed sensor of the application is shown.

[0013] Fig. 2 A cross-sectional structural schematic diagram of the wheel speed sensor of the application is shown.

[0014] Fig. 3 A structural schematic diagram of the induction chip in the application is shown.

[0015] Fig. 4 A structural schematic diagram of the wheel speed sensor of the application when installed on the hub shell is shown. DETAILED DESCRIPTION

[0016] The following description is provided to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only examples, and other obvious modifications can be made by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0017] Those skilled in the art shall understand that in the disclosure of the specification, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the above terms cannot be understood as a limitation on the utility model.

[0018] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0019] Reference Figs. 1 to 4 The embodiment of the present application provides a wheel speed sensor, which comprises a sensor body 10. The sensor body 10 penetrates a hub shell 20 and is close to a target magnetic wheel 30 at an inner side end. The sensor body 10 comprises an outer shell 11, and an induction chip 40 is arranged in the outer shell 11. The induction chip 40 comprises an induction main body 41, and the induction main body 41 is close to the target magnetic wheel 30. An inclined surface structure 111 parallel to the surface of the target magnetic wheel 30 is arranged on the inner side end of the sensor body 10 on the side close to the target magnetic wheel 30. The outer surface of the inclined surface structure 111 is an induction surface of the sensor body 10. The induction main body 41 is opposite to and parallel to the inclined surface structure 111, so that the induction main body 41 can be parallel to the surface of the target magnetic wheel 30 after the sensor body 10 is installed in place.

[0020] That is, the induction main body 41 and the inclined surface structure 111 are parallel, and the induction main body 41 and the inclined surface structure 111 are also parallel to the surface of the target magnetic wheel 30 when the sensor body 10 is installed in place in the hub shell 20. In this way, the induction distance between the induction surface of the sensor and the surface of the target magnetic wheel 30 can be well controlled, the induction distance of the induction chip 40 is more accurate within the specification range of the chip, the product performance of the sensor is more stable, and the cost of the sensor does not increase significantly.

[0021] In addition, due to the design of the inclined surface structure 111, there is still a gap between the sensor outer shell 11 and the target magnetic wheel 30 when the sensor body 10 is installed in place, so that installation interference is not easy to occur, and the outer shell 11 can also be kept close to the target magnetic wheel 30 to meet the induction distance requirement of the induction chip. The induction distance can be easily controlled accurately.

[0022] In one embodiment, the sensing chip 40 is provided with a pin 42, and the sensor body 10 is further provided with a chip holder 14 with terminals, wherein the chip holder 14 with terminals is connected to the sensing body 41 through the pin 42. The other end of the chip holder 14 with terminals is connected to a wire 44, and the other end of the wire 44 extends to the outside of the sensor body 10.

[0023] In one embodiment, the pin is two, and the chip holder 14 with terminals has two terminals.

[0024] In one embodiment, the pin 42 is bent at a predetermined angle near one end of the sensing body 41, and the pin 42 includes a first connecting part 421 and a second connecting part 422 with the bent line as the boundary line, wherein the other end of the first connecting part 421 is connected to the sensing body 41, and the other end of the second connecting part 422 is connected to the chip holder 14 with terminals and is parallel to the surface (i.e. reference surface) of the sensor body 10.

[0025] In one embodiment, the sensor body 10 is sleeved with a support ring 12, wherein the support ring 12 is connected to the hub shell 20 through a fastener 13, and when the sensor body 10 is installed in place, the support ring 12 abuts against the outer surface of the hub shell 20, and the fastener 13 can be a bolt.

[0026] It should be noted that the terms "first", "second" in the present application are only for descriptive purposes, and do not indicate any order, and cannot be understood as indicating or implying relative importance, and these terms can be interpreted as names.

[0027] It should be understood by those skilled in the art that the above description and the embodiments of the present application shown in the drawings are only examples and do not limit the present application. The advantages of the present application have been fully and effectively realized. The functions and structural principles of the present application have been shown and described in the embodiments, and the embodiments of the present application can be any modification or change without departing from the principles.

Claims

1. A wheel speed sensor, comprising a sensor body extending through a wheel hub housing and positioned near a target magnetic wheel at its inner end, wherein a sensing chip is disposed within the sensor body, the sensing chip comprising a sensing element positioned near the target magnetic wheel, characterized in that... The inner end of the sensor body is provided with a slope structure parallel to the surface of the target magnetic wheel on the side close to the target magnetic wheel, the outer surface of the slope structure is the sensing surface of the sensor body, the sensing body is opposite to and parallel to the slope structure.

2. The wheel speed sensor of claim 1, wherein, The sensing chip is provided with a pin, and the sensor body is further provided with a chip support with a terminal, and the chip support with the terminal is connected to the sensing body through the pin.

3. The wheel speed sensor of claim 2, wherein, The pin is two, and the chip support with the terminal has two terminals.

4. The wheel speed sensor of claim 2, wherein, The pin is bent at a predetermined angle at the end close to the sensing body; the pin includes a first connecting part and a second connecting part with the bending line as the boundary, the other end of the first connecting part is connected to the sensing body, and the other end of the second connecting part is connected to the chip support with the terminal and is parallel to the surface of the sensor body.

5. The wheel speed sensor of claim 1, wherein, A supporting ring is sleeved on the sensor body, the supporting ring is connected to the hub shell through a fastener, and the supporting ring is attached to the outer surface of the hub shell when the sensor body is installed in place.

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