Wheel speed sensor and vehicle

Abstract

The utility model relates to a wheel speed sensor and a vehicle. The wheel speed sensor comprises a support which is provided with a first end and a second end, the first end is provided with a chip, and the second end is provided with a pin which is used for keeping electrical connection with the chip; the frame body is integrally formed on the outer side of the support in an injection molding mode and used for partially wrapping the support, and the first end of the support extends out of the frame body; the head end portion is integrally formed on the outer side of the first end of the support in an injection molding mode and used for wrapping the chip, and the head end portion is matched with the frame body; the positioning structure is arranged on the end face, not wrapped by the frame body, of the second end of the support and used for positioning the support. The wheel speed sensor is simple in structure, flexible in arrangement and convenient to manufacture.

Description

Technical Field

[0001] The present application belongs to the field of automobile parts, and in particular, relates to a wheel speed sensor and a vehicle equipped with the wheel speed sensor. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] Wheel speed sensor is a sensor used to accurately measure the rotation speed of the car wheels. The sensor can provide feedback on the speed in a timely manner so that the driver can monitor the speed of the car. For modern cars, wheel speed information is essential. Vehicle dynamic control systems, electronic stability programs, anti-lock braking systems, automatic transmission control systems, etc. all require wheel speed information to ensure driving safety.

[0004] Application Contents

[0005] According to the present application, a wheel speed sensor is provided, the wheel speed sensor comprising:

[0006] A bracket having a first end and a second end, wherein the first end is provided with a chip, and the second end is provided with a pin for maintaining electrical connection with the chip;

[0007] A frame body, which is integrally formed on the outer side of the bracket by injection molding and is used to partially cover the bracket, wherein the first end of the bracket extends from the frame body;

[0008] a head end portion, which is integrally formed on the outer side of the first end of the bracket by injection molding and is used to cover the chip, wherein the head end portion cooperates with the frame body; and

[0009] A positioning structure is arranged at the end surface of the second end of the bracket that is not covered by the frame body, and is used to position the bracket.

[0010] Optionally, in the wheel speed sensor as described above, the positioning structure is a positioning hole or a protrusion.

[0011] Optionally, in the wheel speed sensor as described above, the cross-sectional area of ​​the positioning hole gradually increases along the length direction of the bracket close to the second end; and / or

[0012] The cross-sectional shape of the positioning hole is one or more of a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon; and / or

[0013] The protrusion is integrally formed with the bracket.

[0014] Optionally, in the wheel speed sensor as described above, the number of the positioning holes is at least two, and the at least two positioning holes are symmetrically arranged relative to the center line of the bracket.

[0015] Optionally, in the wheel speed sensor as described above, the pin is connected to a connection end of a wire for transmitting a wheel rotation signal by plugging; and / or

[0016] The chip is fixed at the first end of the bracket by welding.

[0017] Optionally, in the wheel speed sensor as described above, the frame body is provided with a mounting hole for mounting a bolt, and a bushing made of metal is provided in the mounting hole; and / or

[0018] A recessed portion for positioning is arranged on the outer side of the frame body.

[0019] In addition, according to the present application, a wheel speed sensor is also provided, the wheel speed sensor comprising:

[0020] A bracket having a first end and a second end, wherein the first end is provided with a chip, wherein the second end is provided with a pin for maintaining electrical connection with the chip;

[0021] a frame body, which is integrally formed on the outer side of the bracket by injection molding and is used to partially cover the bracket, wherein the first end of the bracket extends from the frame body, and the frame body is provided with a positioning pin hole for inserting a positioning pin during the injection molding process and is filled with injection molding material after the injection molding; and;

[0022] The head end portion is integrally formed on the outer side of the first end of the bracket by injection molding, and is used to cover the chip, wherein the head end portion cooperates with the frame body.

[0023] Optionally, in the wheel speed sensor as described above, the positioning pin includes a first positioning pin and a second positioning pin, the first positioning pin is located above the bracket, and the second positioning pin is located below the bracket.

[0024] Optionally, in the wheel speed sensor as described above, the pin is connected to a connection end of a wire for transmitting a wheel rotation signal by plugging; and / or

[0025] The chip is fixed to the first end of the bracket by welding; and / or

[0026] The frame body is provided with a mounting hole for mounting a bolt, and a bushing made of metal is provided in the mounting hole; and / or

[0027] A recessed portion for positioning is arranged on the outer side of the frame body.

[0028] In addition, according to the present application, a vehicle is also provided, wherein the vehicle is provided with the above-mentioned wheel speed sensor.

[0029] It can be understood that the wheel speed sensor according to the present application has a simple structure, flexible layout and convenient manufacturing, and uses an injection molding process to wrap the injection molding material around the sensor chip and the outside of the bracket to achieve the sealing and installation requirements of the chip. In addition, the wheel speed sensor adopts a positioning structure to ensure that the bracket used to carry the chip will not deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0031] Figure 1 An exploded schematic diagram of an embodiment of a wheel speed sensor disclosed in the present application is exemplarily shown;

[0032] Figure 2 By way of example Figure 1 A cross-sectional schematic diagram of a wheel speed sensor shown in ;

[0033] Figure 3 By way of example Figure 1 A partially enlarged structural schematic diagram of an embodiment of a bracket of a wheel speed sensor shown in FIG.

[0034] Figure 4 By way of example Figure 1 A structural schematic diagram of an embodiment of a bracket of a wheel speed sensor shown in ;

[0035] Figure 5 By way of example Figure 1 A structural schematic diagram of another embodiment of a bracket of a wheel speed sensor shown in ;

[0036] Figure 6 A cross-sectional schematic diagram exemplarily shows another embodiment of the wheel speed sensor disclosed in the present application; and

[0037] Figure 7 By way of example Figure 6 A top view of the wheel speed sensor shown in FIG. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. First of all, it should be noted that the directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0039] In this application, unless otherwise clearly specified and limited, the term "fixed" and the like should be understood in a broad sense. For example, "fixed" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Those skilled in the art know that wheel speed sensors can provide timely feedback on wheel speed so that drivers can monitor vehicle speed. Therefore, the accuracy of wheel speed sensors directly affects the overall safety of the vehicle. In order to ensure that the performance of wheel speed sensors is qualified, performance testing of wheel speed sensors is required. In addition to conventional functional tests, each wheel speed sensor also requires a full set of life tests, which results in long product release testing time and high costs.

[0041] Figure 1 FIG. 1 shows a schematic structural diagram of a wheel speed sensor disclosed in the present application. Figure 1 and Figure 2It can be clearly seen that the wheel speed sensor 100 is composed of a bracket 110, a frame body 120, a head end 130, a positioning structure 150 and other components. The bracket 110 has a first end 111 and a second end 112, and the first end 111 is provided with a chip 140. The chip 140 is fixed to the first end 111 of the bracket 110 by welding, such as laser welding. The second end 112 is provided with a pin 113 for maintaining electrical connection with the chip 140, and the pin 113 is connected to the connecting end of the wire (not shown) for transmitting the wheel rotation signal by plugging, for example. The frame body 120 is integrally formed on the outer side of the bracket 110 by injection molding, and is used to partially cover the bracket 110 and be fixedly connected thereto, wherein the first end 111 of the bracket 110 extends from the frame body 120. The head end portion 130 is integrally formed on the outer side of the first end 111 of the bracket 110 by injection molding, and is used to cover the chip 140 and be fixedly connected thereto, wherein the head end portion 130 cooperates with the frame body 120 to form a protective cover shell of the wheel speed sensor 100. The positioning structure 150 is arranged at the end surface of the second end 112 of the bracket 110 that is not covered by the frame body 120, and is used to position the bracket 110, so as to ensure that the bracket 110 will not be deformed during the injection molding of the frame body 120. It should be noted that the head end portion 130 of the wheel speed sensor 100 adopts a standardized design, and no matter what the shape and size of the frame body matched therewith are, it will not affect the main structure of the head end portion and the chip wrapped therein, so the entire product does not need to undergo a full set of life tests, but only needs to undergo functional tests, thereby achieving the purpose of reducing enterprise costs.

[0042] In other optional embodiments, the positioning structure 150 may be in the form of a positioning hole 150a, such as Figure 3 to Figure 4 For example, the cross-sectional area of ​​the positioning hole 150a can be designed to gradually increase along the length direction of the bracket 110 close to the second end 112 (see Figure 2 ), so that the mold tooling can be better inserted into the positioning hole 150a during the injection molding of the frame body 120. In addition, the cross-sectional shape of the positioning hole 150a can be set to other shapes such as a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon. For another example, the number of the positioning holes 150a can be at least two, and the at least two positioning holes are symmetrically arranged relative to the center line of the bracket 110. As an alternative, the positioning structure 150 can also be in the form of a protrusion 150b, such as Figure 5 For example, the protrusion 150b is integrally formed with the bracket 110 to facilitate manufacturing.

[0043] In addition to providing a positioning structure for positioning the bracket 110 at the bracket 110, those skilled in the art may also conceive of providing a positioning structure for positioning the bracket 110 at the frame body 120. Figure 6 and Figure 7 As shown, the frame body 120 is provided with a locating pin hole 121, and the locating pin hole 121 is used to insert a locating pin (not shown) during the injection molding process and is filled with injection molding material after injection molding. Specifically, the locating pin abuts against the bracket 110 after being inserted into the locating pin hole 121, and is used to position the bracket 110. Further, the locating pin includes a first locating pin and a second locating pin, the first locating pin is located above the bracket 110, and the second locating pin is located below the bracket 110. After the frame body 120 is cooled after the pressure holding stage of injection molding, the first locating pin and the second locating pin will be pulled out with the opening of the injection mold, and the locating pin hole 121 will be filled with injection molding material under the residual injection molding pressure to prevent dust or water from entering the interior of the wheel speed sensor 100.

[0044] Those skilled in the art will readily appreciate that the frame body 120 can not only protect the bracket, but also fix the wheel speed sensor 100 at a target location, such as a vehicle chassis. The frame body 120 is provided with a mounting hole 122 for mounting a bolt (not shown), and a bushing 160 made of metal is disposed in the mounting hole 122.

[0045] Continue to refer Figure 1 , Figure 2 and Figure 7 The outer side of the frame body 120 is provided with a recess 123 for positioning. During the injection molding of the head end 130 , the operator can first fix the frame body 120 on the mold through the recess 123 , and then perform injection molding on the head end 130 .

[0046] In addition, the present application also proposes a vehicle, which is provided with the above-mentioned wheel speed sensor 100. The vehicle can be a private car, a taxi, a public bus, a minibus or a bus.

[0047] In summary, the wheel speed sensor of the present application has a simple structure, flexible layout and convenient manufacturing. The injection molding process is used to wrap the injection molding material around the sensor chip and the outside of the bracket to achieve the sealing and installation requirements of the chip. In addition, the wheel speed sensor adopts a positioning structure to ensure that the bracket used to carry the chip will not be deformed. Therefore, it is highly recommended to use this wheel speed sensor in vehicles.

[0048] Several specific implementations are listed above to explain in detail the wheel speed sensor of the present application and the vehicle equipped with the wheel speed sensor. These examples are only used to illustrate the principle and implementation of the present application, but not to limit the present application. Without departing from the spirit and scope of the present application, ordinary technicians in this field can also make various modifications and improvements. Therefore, all equivalent technical solutions should belong to the scope of the present application and be defined by the claims of the present application.

Claims

1. A wheel speed sensor, characterized in that: It includes: A bracket (110) having a first end (111) and a second end (112), wherein the first end (111) is provided with a chip (140), and the second end (112) is provided with a pin (113) for maintaining electrical connection with the chip (140); a frame body (120) which is integrally formed on the outer side of the bracket (110) by injection molding and is used to partially cover the bracket (110), wherein the first end (111) of the bracket (110) extends from the frame body (120); a head end portion (130) which is integrally formed on the outer side of the first end (111) of the bracket (110) by injection molding and is used to cover the chip (140), wherein the head end portion (130) cooperates with the frame body (120); and A positioning structure (150) is arranged at the end surface of the second end (112) of the bracket (110) that is not covered by the frame body (120) and is used to position the bracket (110).

2. The wheel speed sensor according to claim 1, characterized in that: The positioning structure (150) is a positioning hole (150a) or a protrusion (150b).

3. The wheel speed sensor according to claim 2, characterized in that: The cross-sectional area of ​​the positioning hole (150a) gradually increases along the length direction of the bracket (110) close to the second end (112); and / or The cross-sectional shape of the positioning hole (150a) is one or more of a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon; and / or The protrusion (150b) and the bracket (110) are integrally formed.

4. The wheel speed sensor according to claim 2 or 3, characterized in that: The number of the positioning holes (150a) is at least two, and the at least two positioning holes are symmetrically arranged relative to the center line of the bracket (110).

5. The wheel speed sensor according to any one of claims 1 to 3, characterized in that: The pin (113) is connected to a connection end of a wire for transmitting a wheel rotation signal by plugging; and / or The chip (140) is fixed at the first end (111) of the bracket (110) by welding.

6. The wheel speed sensor according to any one of claims 1 to 3, characterized in that: The frame body (120) is provided with a mounting hole (122) for mounting a bolt, and a bushing (160) made of metal is provided in the mounting hole (122); and / or A recessed portion (123) for positioning is provided on the outer side of the frame body (120).

7. A wheel speed sensor, characterized in that: It includes: A bracket (110) having a first end (111) and a second end (112), wherein the first end (111) is provided with a chip (140), wherein the second end (112) is provided with a pin (113) for maintaining electrical connection with the chip (140); a frame body (120) which is integrally formed on the outer side of the bracket (110) by injection molding and is used to partially cover the bracket (110), wherein the first end (111) of the bracket (110) extends from the frame body (120), and the frame body (120) is provided with a positioning pin hole (121) for inserting a positioning pin during the injection molding process and being filled with injection molding material after the injection molding; and The head end portion (130) is integrally formed on the outer side of the first end (111) of the bracket (110) by injection molding, and is used to cover the chip (140), wherein the head end portion (130) cooperates with the frame body (120).

8. The wheel speed sensor according to claim 7, characterized in that: The positioning pin comprises a first positioning pin and a second positioning pin, the first positioning pin being located above the bracket (110) and the second positioning pin being located below the bracket (110).

9. The wheel speed sensor according to claim 7 or 8, characterized in that: The pin (113) is connected to a connection end of a wire for transmitting a wheel rotation signal by plugging; and / or The chip (140) is fixed to the first end (111) of the bracket (110) by welding; and / or The frame body (120) is provided with a mounting hole (122) for mounting a bolt, and a bushing (160) made of metal is provided in the mounting hole (122); and / or A recessed portion (123) for positioning is provided on the outer side of the frame body (120).

10. A vehicle, characterized in that: The vehicle is provided with a wheel speed sensor (100) according to any one of claims 1-9.

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