A protection mechanism for a wheel speed sensor

Abstract

This utility model relates to the field of wheel speed sensor technology, specifically a protective mechanism for a wheel speed sensor. The middle part of the base is provided with a housing and an annular threaded groove. The periphery of the housing is provided with an annular protrusion that is inserted into and threadedly connected to the annular threaded groove. The top of the housing is provided with a limiting frame, and the limiting frame is provided with a positioning groove. The positioning groove is provided with a limiting seat, and the middle part of the limiting seat is provided with a third sealing ring. The control line at the through hole is wrapped and sealed by the annular frame and the first sealing ring. Combined with the threaded seal between the housing and the base, the cooperation between the annular base plate and the annular protrusion, and the secondary seal of the third sealing ring in the limiting seat, a triple waterproof structure of "entry seal - connection seal - internal protection" is formed, which effectively prevents moisture, dust and other impurities from entering the wheel speed sensor and significantly improves the reliability of the sensor in harsh environments such as humid and muddy conditions.

Description

Technical Field

[0001] This utility model relates to the field of wheel speed sensor technology, specifically a protection mechanism for wheel speed sensors. Background Technology

[0002] Wheel speed sensors are used to measure the rotational speed of a car's wheels. Wheel speed information is essential for modern cars, as it is required by vehicle dynamic control systems (VDC), electronic stability programs (ESP), anti-lock braking systems (ABS), and automatic transmission control systems.

[0003] However, in the existing wheel speed sensors, the connecting wires pass through the through holes in the wheel speed sensor housing, leaving gaps. When a car drives over a wet road surface, splashed water can easily seep into the wheel speed sensor through these gaps, which can easily cause wheel speed sensor failure and affect the stability of the wheel speed sensor during use. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a protective mechanism for wheel speed sensors.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a protection mechanism for a wheel speed sensor, comprising a wheel speed sensor body, a base at the rear end of the wheel speed sensor body, a plurality of through holes penetrating the base at the rear end of the wheel speed sensor body, a control line penetrating the through holes inside the wheel speed sensor body, an annular frame at the through holes, the annular frame being inserted into the through holes and threadedly connected to the through holes, and a first sealing ring through which the control line passes on the inner ring of the annular frame;

[0008] The base has a housing and an annular threaded groove in the middle part. The periphery of the housing has an annular protrusion that is inserted into and threadedly connected to the annular threaded groove. The top of the housing has a limiting frame with a positioning groove inside. The positioning groove has a limiting seat inside. The middle part of the limiting seat has a third sealing ring with multiple wire holes through which control lines pass. The inner wall of the positioning groove has a slot. The two sides of the limiting seat have grooves with springs inside. One end of the spring has a locking block that mates with the slot. The locking block has an isosceles trapezoidal structure.

[0009] To facilitate assembly of the ring frame, the present invention includes an improvement in which multiple actuating blocks are symmetrically arranged on the ring frame.

[0010] Furthermore, the improvement of this utility model is that the inner wall of the first sealing ring is tightly fitted to the outer wall of the control line, and the inner wall of the wire hole is tightly fitted to the outer wall of the control line.

[0011] To facilitate assembly of the housing, the present invention includes an improvement where the outer wall of the housing is provided with anti-slip texture.

[0012] To ensure the airtightness between the housing and the base, the present invention includes an improvement in that the housing is provided with an annular bottom plate on its periphery, and a second sealing ring is provided between the annular bottom plate and the base.

[0013] Furthermore, an improvement of this utility model is that the first sealing ring, the second sealing ring, and the third sealing ring are all made of silicone.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a protection mechanism for wheel speed sensors, which has the following advantages:

[0016] The control line at the through hole is wrapped and sealed by the ring frame and the first sealing ring. Combined with the threaded seal between the housing and the base, the cooperation between the annular base plate and the annular protrusion, and the secondary seal of the third sealing ring in the limit seat, a triple waterproof structure of "entry seal - connection seal - internal protection" is formed, which effectively prevents moisture, dust and other impurities from entering the wheel speed sensor and significantly improves the reliability of the sensor in harsh environments such as humid and muddy conditions. Attached Figure Description

[0017] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0019] Figure 3 This utility model Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the installation structure of the limiting seat in this utility model;

[0021] In the diagram: 1. Wheel speed sensor body; 2. Base; 3. Through hole; 4. Control line; 5. Ring frame; 6. Actuating block; 7. First sealing ring; 8. Housing; 9. Ring base plate; 10. Ring threaded groove; 11. Ring protrusion; 12. Second sealing ring; 13. Limiting frame; 14. Positioning groove; 15. Limiting seat; 16. Third sealing ring; 17. Slot; 18. Groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0023] Please see Figures 1-4 This utility model discloses a protective mechanism for a wheel speed sensor, comprising a wheel speed sensor body 1, a base 2 at the rear end of the wheel speed sensor body 1, and a plurality of through holes 3 penetrating the base 2 at the rear end of the wheel speed sensor body 1. A control line 4 penetrating the through holes 3 is provided inside the wheel speed sensor body 1, and an annular frame 5 is provided at the through hole 3. The annular frame 5 is inserted into the through hole 3 and threadedly connected to the through hole 3. The inner ring of the annular frame 5 is provided with a first sealing ring 7 through which the control line 4 passes.

[0024] The middle part of the base 2 is provided with a housing 8 and an annular threaded groove 10. The periphery of the housing 8 is provided with an annular protrusion 11 that is inserted into the annular threaded groove 10 and threadedly connected to the annular threaded groove 10. The top of the housing 8 is provided with a limiting frame 13. The limiting frame 13 is provided with a positioning groove 14. The positioning groove 14 is provided with a limiting seat 15. The middle part of the limiting seat 15 is provided with a third sealing ring 16. The third sealing ring 16 is provided with multiple wire holes through which the control line 4 passes. The inner wall of the positioning groove 14 is provided with a slot 17. The two sides of the limiting seat 15 are provided with grooves 18. The inside of the grooves 18 is provided with a spring. One end of the spring is provided with a locking block that cooperates with the slot 17. The locking block is an isosceles trapezoidal structure (the inclined surface of the trapezoid faces the inner wall of the positioning groove 14).

[0025] The inner wall of the first sealing ring 7 is in close contact with the outer wall of the control line 4, and the inner wall of the wire hole is in close contact with the outer wall of the control line 4.

[0026] In this wheel speed sensor protection mechanism, multiple seals and a convenient maintenance structure work together to achieve efficient protection of the wheel speed sensor body 1. The specific process is as follows:

[0027] Control line 4 inlet seal:

[0028] The annular bracket 5 is screwed into the through hole 3. The annular bracket 5 is initially fixed by engaging with the inner wall of the through hole 3 through its outer thread. The first sealing ring 7 (made of silicone) embedded in the inner ring of the annular bracket 5 tightly wraps around the outer wall of the control line 4, forming a second sealing barrier to prevent moisture from seeping into the sensor through the gap between the through hole 3 and the control line 4. The actuating block 6 on the annular bracket 5 allows for manual rotation to ensure a tight threaded connection between the annular bracket 5 and the through hole 3.

[0029] Sealed connection between housing 8 and base 2:

[0030] The annular threaded groove 10 in the middle of the base 2 is threadedly connected to the annular protrusion 11 (made of silicone) on the periphery of the housing 8, so that the housing 8 is securely installed on the base 2.

[0031] The housing 8 is provided with an annular bottom plate 9 on its periphery, and a second sealing ring 12 is provided between the annular bottom plate 9 and the base 2.

[0032] The anti-slip texture on the outer wall of the housing 8 increases friction, making it easy to manually tighten the housing 8 and ensuring that the annular protrusion 11 and the annular threaded groove 10 fit tightly, preventing moisture from entering from the connection between the base 2 and the housing 8. The annular base plate 9 on the periphery of the housing 8 and the base 2 form an annular sealing area through the second sealing ring 12, further enhancing the sealing of the connection.

[0033] Dual protection from the limit seat 15 and the third sealing ring 16:

[0034] The limiting seat 15 engages with the slot 17 on the inner wall of the positioning groove 14 via springs and locking blocks within the side grooves 18. The third sealing ring 16 (made of silicone) in the middle of the limiting seat 15 has multiple wire-passing holes. When the control wire 4 passes through these holes, the inner wall of the hole tightly adheres to the outer wall of the control wire 4, forming the first sealing barrier. The locking block has an isosceles trapezoidal structure. When the vehicle vibrates, the inclined surface of the locking block contacts the inner wall of the slot 17, and the spring force keeps the locking block engaged within the slot 17, preventing the limiting seat 15 from loosening and ensuring the locking block does not detach from the slot 17. When the third sealing ring 16 needs to be replaced, applying a pushing force compresses the spring and disengages the locking block from the slot 17, allowing the limiting seat 15 to be pushed out of the positioning groove 14 for easy disassembly and replacement of the sealing components.

[0035] The first sealing ring 7, the second sealing ring 12, and the third sealing ring 16 are all made of silicone.

[0036] The first sealing ring 7, the annular protrusion 11, and the third sealing ring 16 are all made of silicone. By utilizing the elastic deformation properties of silicone, the control line 4 is always tightly fitted to the outer wall and the connection gap when it vibrates or the vehicle is bumpy, ensuring that the sealing performance is not affected by dynamic working conditions.

[0037] Multiple actuating blocks 6 are symmetrically arranged on the ring frame 5.

[0038] The outer wall of the housing 8 is provided with anti-slip texture.

[0039] The anti-slip texture design of the actuating block 6 of the ring frame 5 and the housing 8 makes installation and disassembly operations easier. The limiting seat 15 is connected to the positioning groove 14 through the spring-loaded block structure. When replacing the third sealing ring 16, no tools are needed; the limiting seat 15 can be manually pushed to achieve quick disassembly.

[0040] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention 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 to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A protective mechanism for a wheel speed sensor, comprising a wheel speed sensor body (1), a base (2) provided at the rear end of the wheel speed sensor body (1), and a plurality of through holes (3) penetrating the base (2) at the rear end of the wheel speed sensor body (1), wherein a control line (4) penetrating the through holes (3) is provided inside the wheel speed sensor body (1), characterized in that: An annular frame (5) is provided at the through hole (3). The annular frame (5) is inserted into the through hole (3) and threadedly connected to the through hole (3). The inner ring of the annular frame (5) is provided with a first sealing ring (7) through which the control line (4) passes. The middle part of the base (2) is provided with a housing (8) and an annular threaded groove (10). The periphery of the housing (8) is provided with an annular protrusion (11) that is inserted into the annular threaded groove (10) and threadedly connected to the annular threaded groove (10). The top of the housing (8) is provided with a limiting frame (13). The limiting frame (13) is provided with a positioning groove (14). The positioning groove (14) is provided with a limiting seat (15). The middle part of the limiting seat (15) is provided with a third sealing ring (16). The third sealing ring (16) is provided with multiple wire holes through which the control line (4) passes. The inner wall of the positioning groove (14) is provided with a slot (17). The two sides of the limiting seat (15) are provided with grooves (18). The inside of the groove (18) is provided with a spring. One end of the spring is provided with a locking block that cooperates with the slot (17). The locking block is an isosceles trapezoidal structure.

2. The protection mechanism for a wheel speed sensor according to claim 1, characterized in that: Multiple actuating blocks (6) are symmetrically arranged on the ring frame (5).

3. The protection mechanism for a wheel speed sensor according to claim 2, characterized in that: The inner wall of the first sealing ring (7) is tightly fitted to the outer wall of the control line (4), and the inner wall of the wire hole is tightly fitted to the outer wall of the control line (4).

4. The protection mechanism for a wheel speed sensor according to claim 3, characterized in that: The outer wall of the housing (8) is provided with anti-slip texture.

5. The protection mechanism for a wheel speed sensor according to claim 4, characterized in that: The shell (8) is provided with an annular bottom plate (9) on its periphery, and a second sealing ring (12) is provided between the annular bottom plate (9) and the base (2).

6. The protection mechanism for a wheel speed sensor according to claim 5, characterized in that: The first sealing ring (7), the second sealing ring (12) and the third sealing ring (16) are all made of silicone.

Images