Compact wheel speed sensor and arrangement structure thereof

Abstract

The compact wheel speed sensor comprises a fixed part and a rotating part, the fixed part comprises a packaging cavity, the axial end face of one end of the packaging cavity comprises a magnetic induction end face, and an angle is formed between the magnetic induction end face and the axial direction of the packaging cavity. A sensing chip electrically connected with the magnetic induction end face is fixed in the packaging cavity, the sensing chip is connected with a wire harness, one end of the wire harness is fixedly connected with the sensing chip, and the other end of the wire harness penetrates through the packaging cavity and is used for being connected with a vehicle body bus. Through angle optimization, integrated design and a light-weight structure, breakthrough improvement is achieved in the aspects of space occupation, assembly efficiency, signal stability and the like, and the vehicle-mounted integrated light-weight signal transmission device is particularly suitable for new energy automobiles and intelligent driving scenes and has extremely high commercial value and technical competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of vehicle sensor equipment technology, specifically to a compact wheel speed sensor and its arrangement structure. Background Technology

[0002] As a core component in automotive control systems that monitors wheel rotation speed, the installation layout of wheel speed sensors directly affects the stability of functions such as anti-skid control and cruise control.

[0003] Currently, most wheel speed sensors on the market adopt a structural design in which the main axis and the magnetic induction end face are arranged parallel to each other (e.g., Figure 1 (As shown). This structure reveals significant drawbacks in actual vehicle layout: the parallel arrangement of the magnetic induction end face with the wheel speed sensor body's axis results in a large required space length for wheel speed sensor assembly. This problem is particularly prominent in scenarios with limited vehicle space, such as compact models or new energy vehicles with extremely high space utilization requirements. It limits the flexibility of arranging other internal components, increases the complexity of the overall vehicle structure design, and may even lead to unreasonable layouts of some components due to space conflicts, reducing the overall utilization rate of the vehicle's interior space.

[0004] Therefore, developing a wheel speed sensor and its arrangement structure that can optimize space occupation and improve the flexibility of vehicle layout has become an urgent need to solve the technical problem of large space occupation in the existing technology. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a compact wheel speed sensor and its arrangement structure that occupies little space and is easy to arrange flexibly on the vehicle body.

[0006] To achieve this objective, the compact wheel speed sensor designed in this utility model includes a fixed part and a rotating part. The fixed part includes an encapsulation cavity. One axial end face of the encapsulation cavity includes a magnetic induction end face arranged at an angle to the axial direction of the encapsulation cavity. An induction chip electrically connected to the magnetic induction end face is fixed inside the encapsulation cavity. The induction chip is connected to a wire harness. One end of the wire harness is fixedly connected to the induction chip, and the other end passes through the encapsulation cavity for connecting to the vehicle bus.

[0007] Furthermore, the magnetic induction end face is arranged at an acute angle to the axial direction of the packaging cavity.

[0008] Furthermore, the angle between the magnetic induction end face and the axial direction of the packaging cavity is 60°.

[0009] Furthermore, the encapsulation cavity is fixed with a mounting bracket for mounting and securing it to a vehicle.

[0010] Furthermore, the mounting bracket includes a flange through which the encapsulation cavity passes perpendicularly.

[0011] Furthermore, the sensing chip is fixed to the magnetic induction end face.

[0012] Furthermore, in a compact wheel speed sensor arrangement, the rotating part includes a magnetic encoder, and the magnetic induction end face is directly opposite the toothed ring of the magnetic encoder and spaced apart.

[0013] Furthermore, the magnetic encoder is fixed to the wheel or a rotating component that rotates synchronously with the wheel, and the encapsulation cavity is fixed to a non-rotating component that rotates relative to the wheel or the rotating component.

[0014] Furthermore, the rotating component includes a wheel axle.

[0015] Furthermore, the non-rotating components include steering knuckles and vehicle suspension.

[0016] The beneficial effects of this utility model are as follows: This utility model, through its inclined magnetic induction end face design, arranges the magnetic induction end face at an acute angle (e.g., 60°) to the axial direction of the encapsulation cavity. This effectively shortens the radial projection length of the sensor, solving the space limitations of compact vehicles or new energy vehicles, and freeing up more space for other vehicle components (such as batteries and motors). The encapsulation cavity is fixed to non-rotating parts (such as steering knuckles and suspensions) via a flanged mounting bracket. The flange structure can adapt to the steering knuckle or suspension interfaces of different vehicle models, eliminating the need for customized modifications and reducing R&D costs. The flange is directly bolted to the vehicle body structure, improving assembly efficiency and facilitating after-sales maintenance. The induction chip is directly fixed to the magnetic induction end face, and the internal wiring harness is integrated into the encapsulation cavity. The chip is in zero-distance contact with the magnetic induction surface, reducing signal transmission attenuation and improving the signal-to-noise ratio. The wiring harness is protected by the encapsulation cavity, avoiding external electromagnetic interference (such as motor noise) and ensuring the accurate response of safety systems such as ABS / ESP. Simultaneously, the integrated design of the encapsulation cavity and mounting bracket reduces redundant components. The overall weight of the wheel speed sensor has been reduced while maintaining its waterproof and dustproof rating, making it suitable for complex road conditions.

[0017] In summary, this utility model achieves breakthrough improvements in space occupancy, assembly efficiency, and signal stability through angle optimization, integrated design, and lightweight structure. It is particularly suitable for new energy vehicles and intelligent driving scenarios, and possesses extremely high commercial value and technological competitiveness. Attached Figure Description

[0018] Figure 1 This is a diagram showing the arrangement of wheel speed sensors in existing technology;

[0019] Figure 2This is a schematic diagram of the internal structure of the fixing part of the wheel speed sensor in this utility model;

[0020] Figure 3 This is a schematic diagram showing the relative arrangement of the fixed part and the rotating part of the wheel speed sensor in this utility model;

[0021] Figure 4 This is a three-dimensional view of the structure of the wheel speed sensor arranged on the wheel axle in this utility model;

[0022] Wherein, 1—encapsulation cavity, 2—magnetic induction end face, 3—induction chip, 4—wire harness, 5—mounting bracket, 6—magnetic encoder, 7—fixed part, 8—rotating part, 9—wheel axle, 10—gear ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0024] like Figure 2 As shown in Figure 3, in some embodiments, the compact wheel speed sensor designed by this utility model includes a fixed part 7 and a rotating part 8.

[0025] Example 1:

[0026] The rotating part 8 includes a magnetic encoder 6, which includes a gear ring 10. The fixing part 7 is composed of an encapsulation cavity 1. A magnetic induction end face 2 is arranged at a certain angle on the axial end face of one end of the encapsulation cavity 1. The sensing chip 3 is fixed inside the encapsulation cavity 1 and electrically connected to the magnetic induction end face 2. The sensing chip 3 is connected to the vehicle bus via a wiring harness 4. One end of the wiring harness 4 is fixedly connected to the sensing chip 3, and the other end passes through the encapsulation cavity 1 to connect to the vehicle bus. This design reduces the space occupied by the wheel speed sensor in the vehicle body by arranging the magnetic induction end face at an angle to the axial direction of the encapsulation cavity, thereby improving the flexibility of vehicle body layout. It is particularly suitable for compact models or new energy vehicles with high space utilization requirements. In scenarios where vehicle body space is limited, the problem of wheel speed sensors occupying a large space is particularly prominent. Traditional wheel speed sensor designs result in a large space length required for assembly, which limits the flexibility of the layout of other components inside the vehicle body. To solve this problem, this utility model designs a compact wheel speed sensor, which reduces the space occupied by the wheel speed sensor in the vehicle body by arranging the magnetic induction end face 2 at an angle to the axial direction of the encapsulation cavity 1, thereby improving the flexibility of vehicle body layout. This design is particularly suitable for compact models or new energy vehicles that require high space utilization.

[0027] Example 2:

[0028] Another wheel speed sensor of the present invention has a general structure that is basically the same as that of Embodiment 1, except that this application further proposes that the magnetic induction end face 2 is arranged at an acute angle to the axial direction of the encapsulation cavity 1. By arranging the magnetic induction end face 2 at an acute angle to the axial direction of the encapsulation cavity 1, the space length required for the wheel speed sensor during assembly can be reduced, thereby solving the problems of low space utilization and inflexible arrangement. The technical feature of arranging the magnetic induction end face 2 at an acute angle to the axial direction of the encapsulation cavity 1 can be implemented in various ways. For example, the magnetic induction end face 2 can form a fixed acute angle with the end face of the encapsulation cavity 1; specifically, this acute angle can be 60 degrees.

[0029] Example 3:

[0030] Another wheel speed sensor of the present invention has a general structure that is basically the same as that of Embodiment 1 or 2, except that this application further proposes: a mounting bracket 5 for mounting and fixing the wheel speed sensor to the vehicle is fixed on the encapsulation cavity 1. The function of the mounting bracket 5 is to facilitate the installation and fixing of the wheel speed sensor, thereby solving the problem of the large space length required for assembly of the wheel speed sensor in scenarios with limited vehicle space. By adding the mounting bracket 5 to the encapsulation cavity 1, the installation position and method can be selected more flexibly, optimizing space utilization and improving the flexibility of vehicle layout. The mounting bracket 5 can take various forms, such as flange structure, clamping structure, or other suitable fixing methods. Specifically, the flange structure allows the encapsulation cavity 1 to pass vertically through the flange, thereby achieving a stable installation. The clamping structure can fix the encapsulation cavity 1 to a specific position on the vehicle body through clamping components. Thus, the most suitable installation method can be selected according to the needs of different vehicle models and vehicle body structures. By adding the mounting bracket 5 to the encapsulation cavity 1, the installation of the wheel speed sensor becomes more flexible and convenient, effectively reducing the space length required for assembly, and is particularly suitable for compact vehicles and new energy vehicles with limited space. This not only optimizes the utilization of the vehicle's interior space but also enhances the overall design flexibility and layout rationality. Compared with existing technologies, the technical solution provided in this application significantly improves the installation efficiency and space utilization of wheel speed sensors, solving the problem of large space occupation in existing technologies.

[0031] Example 4:

[0032] Based on embodiments 1, 2, or 3 above, a wheel speed sensor arrangement structure is proposed: a magnetic encoder 6 is fixed to the wheel or a rotating component that rotates synchronously with the wheel, and an encapsulation cavity 1 is fixed to a non-rotating component that rotates relative to the wheel or rotating component. Specifically, the magnetic encoder 6 can be installed on the wheel or a component that rotates synchronously with the wheel, such as an axle, using conventional fixing methods such as bolts or clips. The encapsulation cavity 1 can be installed on a non-rotating component that rotates relative to the wheel or rotating component, such as a steering knuckle or vehicle suspension, using methods such as welding or bolt fixing. To ensure accurate relative positioning between the magnetic encoder 6 and the encapsulation cavity 1, an adjustment mechanism can be provided on the encapsulation cavity 1 for fine-tuning during installation. Thus, the magnetic encoder 6 and the encapsulation cavity 1 can maintain an effective sensing distance and positional relationship during relative rotation, thereby ensuring the accuracy and reliability of the wheel speed sensor. The magnetic induction end face 2 is aligned with the toothed ring 10 of the magnetic encoder 6 and arranged with a gap, which reduces the space length required for the wheel speed sensor during vehicle assembly. This arrangement optimizes space occupation and improves the flexibility of vehicle layout. Furthermore, the gap arrangement between the magnetic induction end face 2 and the toothed ring 10 of the magnetic encoder 6 can be adjusted to achieve different sensing effects. For example, the gap can be designed to be between 0.5 mm and 1 mm to ensure stable operation under different working conditions. In addition, the toothed ring 10 of the magnetic encoder 6 can be made of various materials, such as ferrite magnets or rare-earth magnets, to meet different performance requirements. The magnetic induction end face 2 can be manufactured using high-precision machining processes to ensure that it is aligned precisely with the toothed ring 10 of the magnetic encoder 6, thereby improving sensing accuracy.

[0033] In summary, this utility model achieves breakthrough improvements in space occupancy, assembly efficiency, and signal stability through angle optimization, integrated design, and lightweight structure. It is particularly suitable for new energy vehicles and intelligent driving scenarios, and possesses extremely high commercial value and technological competitiveness.

[0034] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting itself to the technical solutions set forth herein. Rather, providing these descriptions will make the disclosure of this utility model thorough and complete, and will fully convey the scope disclosed herein to those skilled in the art. Furthermore, the technical solutions of this utility model are defined only by the scope of the claims. The shapes, dimensions, ratios, angles, and figures disclosed in the description of various aspects of this specification and claims are merely examples, and therefore, this specification and claims are not limited to the details shown. In the following description, detailed descriptions of related known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this specification and claims. Where the terms “comprising,” “having,” and “including” are used as described in this specification, there may also be another part or other components, and the terms used are generally singular but may also represent plural forms. It should be noted that although various different components may appear and be described in this specification using terms such as “first,” “second,” “top,” “bottom,” “side,” “other side,” “one end,” “other end,” etc., these components and parts should not be limited by these terms. These terms are only used to distinguish one component and part from another component and part. For example, without departing from the scope of this specification, the first component may be referred to as the second component, and similarly, the second component may be referred to as the first component. The top and bottom components may, under certain circumstances, be interchanged or converted; components at one end and the other end may have the same or different performance characteristics. Furthermore, although not explicitly described, the construction of components necessarily includes a certain margin of error. Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A compact wheel speed sensor, comprising a fixed part (7) and a rotating part (8), characterized in that: The fixing part includes a packaging cavity (1). One end of the axial end face of the packaging cavity (1) includes a magnetic induction end face (2) arranged at an angle to the axial direction of the packaging cavity (1). An induction chip (3) electrically connected to the magnetic induction end face (2) is fixed inside the packaging cavity (1). The induction chip (3) is connected to a wire harness (4). One end of the wire harness (4) is fixedly connected to the induction chip (3), and the other end passes through the packaging cavity (1) to connect to the vehicle body bus.

2. The compact wheel speed sensor as described in claim 1, characterized in that: The magnetic induction end face (2) is arranged at an acute angle to the axial direction of the encapsulation cavity (1).

3. The compact wheel speed sensor as described in claim 2, characterized in that: The angle between the magnetic induction end face (2) and the axial direction of the encapsulation cavity (1) is 60°.

4. The compact wheel speed sensor as described in claim 1, characterized in that: The encapsulation cavity (1) is fixed with a mounting bracket (5) for mounting and fixing it to the vehicle.

5. The compact wheel speed sensor as described in claim 4, characterized in that: The mounting bracket (5) includes a flange, and the encapsulation cavity (1) passes vertically through the flange.

6. The compact wheel speed sensor as described in claim 1, characterized in that: The sensing chip (3) is fixed on the magnetic induction end face (2).

7. An arrangement structure for a compact wheel speed sensor as described in any one of claims 1-6, characterized in that: The rotating part includes a magnetic encoder (6), and the magnetic induction end face (2) is directly opposite to the tooth ring (10) of the magnetic encoder (6) and is arranged with a gap.

8. The arrangement structure of the compact wheel speed sensor as described in claim 7, characterized in that: The magnetic encoder (6) is fixed to the wheel or a rotating component that rotates synchronously with the wheel, and the encapsulation cavity (1) is fixed to a non-rotating component that rotates relative to the wheel or the rotating component.

9. The arrangement structure of the compact wheel speed sensor as described in claim 8, characterized in that: The rotating component includes a wheel axle (9).

10. The arrangement structure of the compact wheel speed sensor as described in claim 8, characterized in that: The non-rotating components include the steering knuckle and the vehicle suspension.

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