A front wheel speed sensor ring gear

Abstract

The utility model discloses a front wheel speed sensor gear ring relates to the technical field of automobile parts, including annular main part, the annular main part is divided into outer ring area and inner ring cooperation department along the radial, the outer ring area has the waist -shaped hole for assembling position adjustment and distributes evenly in the circumference, the inner ring cooperation department is the irregular structure that adapts with the wheel hub or brake disc profile, the length space of the waist -shaped hole of this scheme outer ring can adapt the slight deformation of front wheel hub because of braking heat production. The wheel hub is easy to appear thermal expansion and cold contraction when the vehicle frequently brakes, and the combination of the irregular profile of the inner ring and the positioning round hole is not only simple to improve the degree of adhesion, but also can adhere to the irregular assembly surface of the wheel hub or brake disc, form the circumferential limiting, and the positioning round hole locks the radial position, which is different from the traditional single clamping structure, can prevent the axial movement of the gear ring under the action of braking impact force, and avoid the signal of strong and weak caused by the movement.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a front wheel speed sensor gear ring. Background Technology

[0002] The front wheel speed sensor gear ring is a core component of the automotive anti-lock braking system (ABS). It works with the speed sensor head to generate wheel speed pulse signals, providing data support for the ABS electronic control unit. It is directly related to the directional stability and driving safety of the vehicle during braking and is widely installed in the front wheel hubs or brake disc assemblies of various vehicles.

[0003] In existing technologies, the front wheel speed sensor gear ring has the following significant drawbacks: Assembly adjustment and positioning defects: Traditional gear rings often use a circular mounting hole design for the outer ring, which can only achieve fixed-position assembly. This cannot adapt to the assembly tolerances of front wheel hubs of different vehicle models, and it is difficult to fine-tune the relative position with the sensor head during subsequent maintenance. Abnormal sensing gaps can easily lead to signal distortion. The inner ring mating part is often a single arc contour, lacking a precise positioning structure. Under high-speed rotation and braking impact conditions, it is easy to loosen or shift, reducing the accuracy of speed signal detection, and even causing component wear or gear ring breakage.

[0004] Structural strength and lightweighting imbalance defects: Traditional gear rings either blindly increase thickness to ensure strength, leading to an increase in the rotational inertia of the front wheel and increased energy consumption; or they reduce thickness to reduce weight, but due to the lack of reinforced structural design, their impact resistance is insufficient, and their service life is greatly shortened under complex road conditions, making it difficult to balance the requirements of structural strength and lightweight. To address this issue, this invention provides a front wheel speed sensor gear ring. By optimizing the structural design, it solves the problems of difficult assembly and adjustment, unstable positioning, and imbalance between structural strength and lightweighting in the prior art, thereby improving its adaptability, reliability, and service life in the ABS system. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a front wheel speed sensor gear ring, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a front wheel speed sensor gear ring, comprising an annular body, the annular body being radially divided into an outer ring region and an inner ring mating portion; the outer ring region having evenly distributed waist-shaped holes for adjusting the assembly position along the circumference; the inner ring mating portion being an irregular structure adapted to the contour of a wheel hub or brake disc, and having positioning holes for positioning the assembly; the annular body being made of ferromagnetic metal in a sheet-like structure, one end face of the annular body being a signal sensing surface for mating with a speed sensor magnetic head, and the other end face being an assembly mating surface for fitting the assembly components.

[0007] Preferably, the waist-shaped hole penetrates the signal sensing surface and the assembly mating surface along the thickness direction of the annular body, and the inner wall edge of the waist-shaped hole is provided with a smooth transition rounded corner to remove burrs; the through-hole design facilitates the discharge of impurities and avoids loosening of the fit, the rounded corner can disperse braking thermal stress to prevent hole wall cracks, and can also reduce the frictional wear between the bolt and the hole wall.

[0008] Preferably, the irregular structure edge of the inner ring mating part is provided with a scratch-resistant chamfer, which extends continuously along the entire circumferential contour of the inner ring mating part; the gap formed by the chamfer can help dissipate heat and prevent the components from sticking together, while avoiding edge friction and curling, and preventing the toothed ring positioning offset from affecting the sensing mating accuracy.

[0009] Preferably, the inner wall of the positioning hole is provided with an internal thread structure, and a preset interval distance is maintained between the hole wall of the positioning hole and the irregular contour edge of the inner ring mating part; the thread fastening can resist the braking axial impact force to prevent movement, the interval distance can avoid edge deformation caused by processing stress, and can also buffer radial vibration to prevent thread loosening.

[0010] Preferably, the outer peripheral edge of the annular body is integrally formed with a reinforced edge, which protrudes in a direction away from the signal sensing surface and forms a stepped structure together with the assembly and fitting surface; the edge enhances impact resistance, the stepped structure prevents circumferential slippage, and at the same time blocks mud and sand from invading the sensing surface, improving the assembly and fitting sealing and rust prevention.

[0011] Preferably, the surface of the signal sensing surface is covered with an anti-slip and wear-resistant coating, which completely covers the entire end face of the signal sensing surface; the coating reduces the adhesion of braking dust and surface corrosion, avoids signal distortion, does not interfere with the magnetic circuit, and extends the effective service life of the gear ring.

[0012] This invention provides a front wheel speed sensor gear ring. It has the following advantages: The oblong hole on the outer ring of this design has a length that can accommodate the slight deformation of the front wheel hub caused by braking heat. During frequent braking, the wheel hub is prone to thermal expansion and contraction. Traditional circular mounting holes are susceptible to displacement of the gear ring due to hub deformation, while the oblong hole provides a buffer for this deformation, preventing disruption of the sensing state between the gear ring and the sensor head, and ensuring stable pulse signals. Simultaneously, the combination of the irregular contour of the inner ring and the positioning hole not only improves the fit, but the irregular contour also conforms to the irregular mating surfaces of the wheel hub or brake disc, forming a circumferential limit, while the positioning hole locks the radial position. This dual constraint counteracts the axial impact force generated during braking. Unlike traditional single-clamping structures, this prevents the gear ring from axially shifting under braking impact, avoiding signal fluctuations caused by such shifting, and ensuring accurate speed data reception by the ABS system under specific operating conditions.

[0013] The reinforced edges on the outer periphery of the ring-shaped body are not merely conventional reinforcement structures. Their raised, stepped structure provides auxiliary restraint with the assembled components, preventing circumferential slippage of the gear ring during high-speed wheel rotation. Furthermore, these edges prevent mud and sand from directly impacting the signal sensing surface edge of the gear ring, reducing interference from the mud and sand on the mating gap between the sensing surface and the sensor head. The through-hole between the waist-shaped hole and the positioning circular hole is not a typical weight-reduction design. This location avoids the critical magnetic circuit area where the gear ring and sensor head mate, preventing the weight-reduction hole from interfering with changes in magnetic flux and affecting the signal. It also avoids the stress area of ​​the assembly fasteners, ensuring fixation strength. Simultaneously, the through-hole forms an airflow channel, helping to dissipate heat transferred to the gear ring during braking, preventing magnetic attenuation due to prolonged high temperatures. This solves the problems of traditional gear rings being either too heavy and prone to magnetic attenuation due to poor heat dissipation, or too thin and easily damaged. It is suitable for the high-temperature, dusty environment of the wheel compartment, extending the functional lifespan of the gear ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is a side view of the structure of this utility model.

[0015] In the diagram, 1. Ring-shaped main body; 2. Outer ring area; 3. Inner ring mating part; 4. Waist-shaped hole; 5. Positioning round hole; 6. Signal sensing surface; 7. Assembly mating surface; 8. Anti-scratch chamfer; 9. Internal thread structure; 10. Reinforced edge. Detailed Implementation

[0016] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: Please refer to Figure 1-3 This utility model provides a technical solution: a front wheel speed sensor gear ring, including an annular body 1, the annular body 1 is radially divided into an outer ring region 2 and an inner ring mating part 3; the outer ring region 2 has waist-shaped holes 4 evenly distributed circumferentially for adjusting the assembly position, the inner ring mating part 3 is an irregular structure adapted to the contour of the wheel hub or brake disc, and the inner ring mating part 3 is provided with positioning round holes 5 for positioning assembly; the annular body 1 is made of ferromagnetic metal to form a sheet structure, one end face of the annular body 1 is a signal sensing surface 6 for mating with the speed sensor magnetic head, and the other end face is an assembly mating surface 7 for fitting the assembly parts. In this embodiment, the outer ring area 2 and the inner ring mating part 3, which are radially divided along the annular body 1, achieve clear functional zoning. The waist-shaped hole 4 of the outer ring can be flexibly adjusted to adapt to the assembly requirements of different vehicle wheel hubs or brake discs. It also facilitates fine-tuning of the relative position with the sensor head during subsequent maintenance to ensure sensing accuracy. The irregular structure of the inner ring can accurately fit with the wheel hub or brake disc and form a double positioning with the positioning round hole 5, which greatly improves the assembly stability and avoids the abnormal speed signal caused by the loosening and displacement of the gear ring when the vehicle is traveling at high speed or braking in an emergency. This lays a solid foundation for the stable operation of the ABS system. The sheet-like structure made of ferromagnetic metal not only meets the magnetic performance requirements for generating pulse signals with the sensor head, but also controls the overall thickness to reduce the rotational load on the front wheels. It balances signal generation capability and lightweight design to adapt to the dynamic working conditions of the vehicle. The differentiated design of the signal sensing surface 6 and the assembly mating surface 7 allows the sensing surface to focus on signal transmission and the mating surface to ensure assembly firmness. Each performs its own function, avoiding signal interference or assembly instability caused by the traditional single end face handling multiple functions, and significantly improving the overall reliability of the gear ring.

[0018] Example 2: Please refer to Figure 1-3This utility model embodiment provides a technical solution: the waist-shaped hole 4 penetrates the signal sensing surface 6 and the assembly mating surface 7 along the thickness direction of the annular body 1, and the inner wall edge of the waist-shaped hole 4 is provided with a smooth transition rounded corner to remove burrs; the irregular structure edge of the inner ring mating part 3 is provided with an anti-scratch chamfer 8, which extends continuously along the entire circumferential contour of the inner ring mating part 3; the inner wall of the positioning round hole 5 is provided with an internal thread structure 9, and a preset interval distance is maintained between the hole wall of the positioning round hole 5 and the irregular contour edge of the inner ring mating part 3; the outer peripheral edge of the annular body 1 is integrally formed with a reinforcing edge 10, which protrudes away from the signal sensing surface 6 and forms a stepped structure together with the assembly mating surface 7; the surface of the signal sensing surface 6 is covered with an anti-slip and wear-resistant coating, which completely covers the entire end face range of the signal sensing surface 6. In this embodiment, the design of the waist-shaped hole 4 penetrating both end faces facilitates the removal of impurities that seep in during assembly, preventing loosening of the gear ring and the assembled components. The smooth transition rounded corners of its inner wall disperse the thermal stress generated by braking, preventing cracks in the hole wall and reducing frictional wear between the assembly bolts and the hole wall. The continuously extending anti-scratch chamfer 8 of the inner ring mating part 3 forms a small annular gap to aid heat dissipation and prevent component adhesion, while also preventing edge friction and curling that could cause gear ring positioning misalignment. The internal thread structure 9 of the positioning circular hole 5 resists the axial impact force of braking, preventing gear ring movement. The hole wall and the inner ring contour edge... The spacing can avoid edge deformation caused by processing stress and buffer radial vibration to prevent thread loosening. The reinforced edge 10 on the outer periphery of the ring body 1 not only enhances the edge impact resistance, but the stepped structure formed by it can also prevent circumferential slippage when the gear ring rotates at high speed and block mud and sand from invading the signal sensing surface 6. It can also improve the assembly sealing and prevent rust. The anti-slip and wear-resistant coating of the signal sensing surface 6 can reduce the adhesion of braking dust and surface corrosion, avoid signal distortion, and does not interfere with the magnetic circuit, thus extending the service life of the gear ring. The synergistic effect of each structure greatly improves the stability and service life of the gear ring under complex working conditions.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0020] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A front wheel speed sensor gear ring, characterized in that: The device includes an annular body (1), which is radially divided into an outer ring area (2) and an inner ring mating part (3). The outer ring area (2) has waist-shaped holes (4) evenly distributed in the circumferential direction for adjusting the assembly position. The inner ring mating part (3) is an irregular structure adapted to the contour of the wheel hub or brake disc, and the inner ring mating part (3) is provided with positioning holes (5) for positioning assembly. The annular body (1) is made of ferromagnetic metal in a sheet-like structure. One end face of the annular body (1) is a signal sensing surface (6) for mating with the magnetic head of the speed sensor, and the other end face is an assembly mating surface (7) for fitting the assembly parts.

2. The front wheel speed sensor gear ring according to claim 1, characterized in that: The waist-shaped hole (4) penetrates the signal sensing surface (6) and the assembly mating surface (7) along the thickness direction of the annular body (1), and the inner wall edge of the waist-shaped hole (4) is provided with a smooth transition rounded corner to remove burrs.

3. The front wheel speed sensor gear ring according to claim 2, characterized in that: The irregular structure edge of the inner ring mating part (3) is provided with a scratch-resistant chamfer (8), which extends continuously along the entire circumferential contour of the inner ring mating part (3).

4. The front wheel speed sensor gear ring according to claim 3, characterized in that: The inner wall of the positioning hole (5) is provided with an internal thread structure (9), and the hole wall of the positioning hole (5) and the irregular contour edge of the inner ring mating part (3) maintain a preset interval distance.

5. The front wheel speed sensor gear ring according to claim 4, characterized in that: The outer peripheral edge of the annular body (1) is integrally formed with a reinforced edge (10), which protrudes in a direction away from the signal sensing surface (6) and forms a stepped structure together with the assembly and fitting surface (7).

6. The front wheel speed sensor gear ring according to claim 5, characterized in that: The surface of the signal sensing surface (6) is covered with an anti-slip and wear-resistant coating, which completely covers the entire end face of the signal sensing surface (6).

Images