High-performance sealing ring and sealing structure for automobile ABS sensor

Abstract

A high-performance sealing ring and sealing structure for automotive ABS sensors are disclosed. The sealing ring cross-section consists of a bottom, an outer side, and an inner side. The bottom is semi-circular, with the arc surface facing the bottom end and the flat surface facing the top end. An outer side and an inner side are respectively provided on the outer and inner sides of the flat surface of the bottom, forming a cavity between them. The outer and inner sides slope towards the cavity from the bottom end to the top end. An outer arc-shaped protrusion and an inner arc-shaped protrusion are respectively provided on the side of the outer and inner sides away from the cavity. This design achieves a double seal through the bottom and the arc-shaped protrusions, and multiple arc-shaped protrusions form a redundant seal, enhancing reliability. Even if the performance of some protrusions deteriorates, the others can still maintain a seal, meeting the long-term stable sealing requirements of ABS sensors. This optimizes sealing performance, effectively solves the problem of loosening in traditional seals, and provides a high-performance, long-life sealing solution for ABS sensors.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring technology, specifically to a high-performance sealing ring and sealing structure for automotive ABS sensors. Background Technology

[0002] The ABS anti-lock braking system is one of the most important safety systems in a motor vehicle. The ABS sensor, as a key component of this system, is usually installed on the wheel hub bearings of the vehicle. Its main function is to monitor the wheel speed in real time and provide critical data for the normal operation of the ABS system. Since the polar axis of the ABS sensor needs to extend from the inside of the sensor housing to the outside, during vehicle operation, especially when the road surface is wet, water droplets splashed by the wheels and water droplets attached to the wheels can easily fall onto the sensor housing and may seep into the housing through the gap between the housing and the polar axis, causing the ABS sensor to malfunction or be damaged, seriously affecting driving safety.

[0003] To address the aforementioned issues, the traditional approach is to add a protective cover to the outside of the ABS sensor and attempt to improve sealing performance by adding a simple sealing gasket at the connection between the protective cover and the polar shaft. However, this simple sealing method has significant drawbacks: after prolonged use, the sealing gasket is prone to loosening due to factors such as vibration and temperature changes during vehicle operation, causing the previously covered gaps to be exposed again, resulting in a significant reduction in sealing effectiveness and failing to meet the long-term stable and reliable sealing performance requirements of the ABS sensor.

[0004] Therefore, developing a high-performance, long-life sealing solution is crucial to ensuring the normal operation of ABS sensors. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a high-performance sealing ring and sealing structure for automotive ABS sensors. This high-performance sealing ring and structure achieves a double seal through a bottom and arc-shaped protrusions, with multiple arc-shaped protrusions forming redundant seals to enhance reliability. Even if the performance of some protrusions deteriorates, others can still maintain a seal, meeting the long-term stable sealing requirements of ABS sensors. The overall sealing structure is rationally designed, with the sealing ring and gland fitting in different states before and after installation, enhancing the sealing effect. The gland is securely fixed and easy to install. Detailed designs such as the outer edge tilt angle, pressure ring thickness, and chamfer optimize sealing performance, effectively solving the problem of loosening in traditional seals, and providing a high-performance, long-life sealing solution for ABS sensors.

[0006] The technical solution of this utility model is as follows: A high-performance sealing ring for automotive ABS sensors has a cross-section consisting of a bottom, an outer side, and an inner side. The bottom is semi-circular, with the arc surface of the bottom facing the bottom end and the flat surface of the bottom facing the top end. An outer side and an inner side are respectively provided on the outer and inner sides of the flat end of the bottom, forming a cavity in the middle of the outer and inner sides. The outer and inner sides are inclined towards the cavity from the bottom end to the top end. An outer arc-shaped protrusion and an inner arc-shaped protrusion are respectively provided on the side of the outer and inner sides away from the cavity.

[0007] There is one or more of the outer arc-shaped protrusions or the inner arc-shaped protrusions.

[0008] Three outer arc-shaped protrusions or three inner arc-shaped protrusions are provided respectively.

[0009] The inclination angles of the outer and inner sides are 1 to 3°.

[0010] A high-performance sealing structure for automotive ABS sensors is disposed between the polar axis of the ABS sensor and the ABS sensor housing. The ABS sensor housing has a shaft hole for the polar axis to pass through. The structure includes a high-performance sealing ring and a pressure cap. A sealing groove is provided at the end of the shaft hole. The high-performance sealing ring is installed in the sealing groove, with its bottom inside the groove and its cavity facing outwards. A pressure cap, which mates with the high-performance sealing ring, is detachably fixed to the ABS sensor housing. The pressure cap consists of a flat plate and a pressure ring, which is inserted into the cavity. Before installation, the outer and inner arc-shaped protrusions of the pressure cap have a clearance fit with the sealing groove and the polar axis, respectively. After installation, the pressure ring, inserted into the cavity, deforms the outer and inner edges, causing the outer and inner arc-shaped protrusions to have an interference fit with the sealing groove and the polar axis, respectively.

[0011] The gland is fixedly attached to the ABS sensor housing with screws.

[0012] The flat plate has screw holes for screws to pass through, and the ABS sensor housing has threaded holes concentric with the screw holes for mounting screws.

[0013] The plate has through holes for the polar axis to pass through.

[0014] The thickness of the pressure ring is 0.5 to 1.5 mm greater than the maximum thickness of the cavity in its natural state.

[0015] The end of the pressure ring is chamfered, and the thickness after chamfering is 1-3 mm less than the minimum thickness of the cavity in its natural state.

[0016] The beneficial effects of this utility model are as follows: 1. This utility model discloses a high-performance sealing ring for automotive ABS sensors. This high-performance sealing ring for automotive ABS sensors forms a double sealing structure by designing the bottom of the sealing ring as a first seal and the arc-shaped protrusions on the outer and inner sides as another seal. During vehicle operation, when water droplets or other substances may seep into the sensor housing, the first bottom seal can block some moisture, while the second seal formed by the arc-shaped protrusions further prevents the remaining moisture from entering, greatly improving the sealing performance and effectively preventing the ABS sensor from malfunctioning or being damaged due to moisture infiltration, thus ensuring driving safety.

[0017] 2. This utility model discloses a high-performance sealing ring for automotive ABS sensors. The high-performance sealing ring for automotive ABS sensors has multiple inner and outer arc-shaped protrusions, forming redundant seals. During long-term use, even if some arc-shaped protrusions experience a decrease in sealing performance due to factors such as vibration and temperature changes during vehicle operation, other arc-shaped protrusions can still continue to perform their sealing function, ensuring the overall stability of the sealing structure and meeting the long-term stable and reliable sealing performance requirements of ABS sensors. Compared with traditional simple sealing gaskets, this significantly extends the service life of the sealing structure.

[0018] 3. This utility model discloses a high-performance sealing structure for automotive ABS sensors. This high-performance sealing structure is positioned between the polar axis of the ABS sensor and the ABS sensor housing. A sealing ring is installed in the sealing groove, and a detachable pressure cap is used. Before installation, the outer and inner arc-shaped protrusions of the pressure cap are clearance-fitted with the sealing groove and the polar axis, respectively, facilitating installation. After installation, a pressure ring is inserted into the cavity, compressing and deforming the outer and inner edges, causing the outer and inner arc-shaped protrusions to interference-fit with the sealing groove and the polar axis, further enhancing the sealing effect. Simultaneously, the pressure cap is fixed to the ABS sensor housing with screws, ensuring a stable structure. Screw holes and through holes are provided on the flat plate for easy installation with the housing and polar axis. The overall structural design is reasonable, effectively solving the problems of easy loosening and significantly reduced sealing effect in traditional sealing methods, providing a high-performance, long-life sealing solution for ABS sensors.

[0019] 4. This utility model discloses a high-performance sealing structure for automotive ABS sensors. The inclination angles of the outer and inner sides of this high-performance sealing structure for automotive ABS sensors are designed to be 1-3°, which helps the sealing ring to deform better to meet sealing requirements during the compression of the gland installation, thereby improving the sealing fit. The thickness of the pressure ring is 0.5-1.5mm greater than the maximum thickness of the cavity in its natural state, and the end is chamfered. The thickness after chamfering is 1-3mm less than the minimum thickness of the cavity in its natural state. This ensures that the pressure ring can be smoothly inserted into the cavity and generate a suitable amount of compression deformation on the sealing ring, which not only ensures the sealing effect but also avoids damage to the sealing ring due to excessive compression, further optimizing the sealing performance. Attached Figure Description

[0020] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0021] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a high-performance sealing ring for an automotive ABS sensor according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a high-performance sealing ring for an automotive ABS sensor during installation, according to an embodiment of this utility model. The components represented by the various reference numerals in the diagram are: This utility model includes: 100, cross-section; 110, bottom; 120, outer side; 121, outer arc-shaped protrusion; 130, inner side; 131, inner arc-shaped protrusion; 140, cavity; 200, polar axis; 300, ABS sensor housing; 310, shaft hole; 320, sealing groove; 330, threaded hole; 400, screw; 500, pressure cap; 510, flat plate; 511, through hole; 512, screw hole; 520, pressure ring. Detailed Implementation

[0022] like Figure 2 As shown, the high-performance sealing structure for automotive ABS sensors is located between the polar axis 200 of the ABS sensor and the ABS sensor housing 300, and mainly consists of a high-performance sealing ring for automotive ABS sensors, a gland 500, and screws 400.

[0023] The ABS sensor housing 300 is provided with a shaft hole 310 for the pole shaft 200 to pass through. A sealing groove 320 is provided at the end of the shaft hole 310. A sealing ring is installed in the sealing groove 320. The pressure cover 500 is detachably fixed to the ABS sensor housing 300 by screws 400 and works in conjunction with the sealing ring.

[0024] The high-performance sealing rings used in automotive ABS sensors are made of fluororubber. Fluororubber has excellent chemical corrosion resistance, high temperature resistance, and good sealing performance. The overall structure is a ring, such as... Figure 1 As shown, the cross-section 100 of the sealing ring consists of a bottom 110, an outer side 120, and an inner side 130. The bottom 110 is semi-circular, with its arc surface facing the bottom end and its flat surface facing the top end. An outer side 120 and an inner side 130 are respectively provided on the outer and inner sides of the flat end of the bottom 110, forming a cavity 140 between them. The outer side 120 and the inner side 130 are inclined from the bottom end to the top end towards the cavity 140 at an angle of 1–3°, so that the cavity 140 naturally forms a shape that is wider at the bottom and narrower at the top. Figure 2 In the middle, L1 represents the thickness at the maximum point of cavity 140, and L2 represents the thickness at the minimum point of cavity 140; an outer arc-shaped protrusion 121 and an inner arc-shaped protrusion 131 are respectively provided on the side of the outer side 120 and the inner side 130 away from cavity 140, and three of the outer arc-shaped protrusion 121 and the inner arc-shaped protrusion 131 are provided respectively.

[0025] The pressure cap 500 consists of a flat plate 510 and a pressure ring 520. The flat plate 510 is provided with a through hole 511 for the pole shaft 200 to pass through and a screw hole 512 for the screw 400 to pass through. The thickness L3 of the pressure ring 520 is 0.5 to 1.5 mm more than the maximum thickness L1 of the cavity 140 in its natural state. Preferably, the end of the pressure ring 520 is provided with a chamfer, and the thickness L4 after chamfering is 1 to 3 mm less than the minimum thickness L2 of the cavity 140 in its natural state.

[0026] Screw 400 is used to fix the gland 500 to the ABS sensor housing 300. The ABS sensor housing 300 is provided with a threaded hole 330 concentric with the screw hole 512 for mounting screw 400.

[0027] The ABS sensor housing 300 is provided with a shaft hole 310 through which the pole shaft 200 passes. The end of the shaft hole 310 is provided with a sealing groove 320 for installing a sealing ring, and a threaded hole 330 concentric with the screw hole 512.

[0028] The polar axis 200 passes through the shaft hole 310 on the ABS sensor housing 300 and the through hole 511 on the pressure cap 500.

[0029] The installation process for the high-performance sealing ring used in this automotive ABS sensor is as follows: Sealing ring installation: Install the high-performance sealing ring of the automotive ABS sensor into the sealing groove 320 of the ABS sensor housing 300, ensuring that the bottom 110 is inside the sealing groove 320 and the cavity 140 faces the outside of the sealing groove 320; at this time, the outer arc-shaped protrusion 121 and the inner arc-shaped protrusion 131 respectively fit with the sealing groove 320 and the polar axis 200 with clearance, which facilitates the subsequent installation of the cover 500.

[0030] Gland installation: Align the pressure ring 520 of the gland 500 with the cavity 140 of the sealing ring. Since the end of the pressure ring 520 is chamfered, it can be smoothly inserted into the cavity 140. As the pressure ring 520 is inserted, it compresses the outer side 120 and the inner side 130 of the sealing ring, causing them to deform. This results in the outer arc-shaped protrusion 121 and the inner arc-shaped protrusion 131 being interference-fitted with the sealing groove 320 and the polar axis 200, respectively, thereby enhancing the sealing effect.

[0031] Screw fixing: Pass the screw 400 through the screw hole 512 on the plate 510 of the cover 500, and then screw it into the threaded hole 330 on the ABS sensor housing 300 to firmly fix the cover 500 to the ABS sensor housing 300, thus completing the installation of the entire sealing structure; after installation, the end of the pressure ring 520 should be pressed on the plane of the bottom 110 and the bottom 110 should be squeezed to make it fit tightly against the sealing groove 320.

[0032] This automotive ABS sensor utilizes a high-performance sealing ring. The bottom of the sealing ring serves as one layer of seal, while the outer and inner curved protrusions form another, creating a dual-seal structure. During vehicle operation, when water droplets or other substances may seep into the sensor housing, the first bottom seal blocks some moisture, while the second seal formed by the curved protrusions further prevents any remaining moisture from entering. This significantly improves sealing performance and effectively prevents ABS sensor malfunction or damage due to moisture infiltration, ensuring driving safety. Multiple inner and outer curved protrusions create redundant seals. Even if some curved protrusions experience a decrease in sealing performance due to vibrations or temperature changes during long-term use, the others continue to provide a seal, ensuring the overall stability of the sealing structure. This meets the long-term, stable, and reliable sealing requirements of the ABS sensor, greatly extending the service life of the sealing structure compared to traditional simple sealing gaskets.

Claims

1. A high-performance sealing ring for automotive ABS sensors, characterized in that, The cross section (100) of the high-performance sealing ring for the automotive ABS sensor consists of a bottom (110), an outer side (120), and an inner side (130). The bottom (110) is semi-circular, with the arc surface of the bottom (110) facing the bottom end and the plane of the bottom (110) facing the top end. An outer side (120) and an inner side (130) are respectively provided on the outer and inner sides of the plane end of the bottom (110). A cavity (140) is formed in the middle of the outer side (120) and the inner side (130). The outer side (120) and the inner side (130) are inclined towards the cavity (140) from the bottom end to the top end. An outer arc-shaped protrusion (121) and an inner arc-shaped protrusion (131) are respectively provided on the side of the outer side (120) and the inner side (130) away from the cavity (140).

2. The high-performance sealing ring for an automotive ABS sensor according to claim 1, characterized in that, One or more of the outer arc-shaped protrusion (121) or the inner arc-shaped protrusion (131) are provided respectively.

3. The high-performance sealing ring for an automotive ABS sensor according to claim 2, characterized in that, Three of each of the outer arc-shaped protrusions (121) or the inner arc-shaped protrusions (131) are provided.

4. The high-performance sealing ring for an automotive ABS sensor according to claim 1, characterized in that, The inclination angles of the outer side (120) and the inner side (130) are 1 to 3°.

5. A high-performance sealing structure for an automotive ABS sensor, disposed between the polar axis (200) of the ABS sensor and the ABS sensor housing (300), wherein the ABS sensor housing (300) has a shaft hole (310) through which the polar axis (200) passes, characterized in that, The system includes a high-performance sealing ring and a gland (500) for an automotive ABS sensor as described in any one of claims 1-4. A sealing groove (320) is provided at the end of the shaft hole (310). The high-performance sealing ring for the automotive ABS sensor is installed in the sealing groove (320), with its bottom (110) inside the sealing groove (320) and its cavity (140) facing outwards from the sealing groove (320). A gland (500) for use with the high-performance sealing ring for the automotive ABS sensor is detachably and fixedly connected to the ABS sensor housing (300). The gland (500) is composed of... The plate (510) and the pressure ring (520) are combined. The pressure ring (520) is inserted into the cavity (140). Before the pressure cover (500) is installed, the outer arc protrusion (121) and the inner arc protrusion (131) are respectively clearance-fitted with the sealing groove (320) and the polar shaft (200). After the pressure cover (500) is installed, the pressure ring (520) is inserted into the cavity (140) and squeezes and deforms the outer side (120) and the inner side (130) so that the outer arc protrusion (121) and the inner arc protrusion (131) are respectively interference-fitted with the sealing groove (320) and the polar shaft (200).

6. The high-performance sealing structure for an automotive ABS sensor according to claim 5, characterized in that, The pressure cap (500) is fixedly connected to the ABS sensor housing (300) by screws (400).

7. The high-performance sealing structure for an automotive ABS sensor according to claim 6, characterized in that, The plate (510) is provided with a screw hole (512) through which a screw (400) passes, and the ABS sensor housing (300) is provided with a threaded hole (330) concentric with the screw hole (512) for mounting the screw (400).

8. The high-performance sealing structure for an automotive ABS sensor according to claim 5, characterized in that, The plate (510) is provided with a through hole (511) through which the polar shaft (200) passes.

9. A high-performance sealing structure for an automotive ABS sensor according to claim 5, characterized in that, The thickness of the pressure ring (520) is 0.5 to 1.5 mm greater than the maximum thickness of the cavity (140) in its natural state.

10. A high-performance sealing structure for an automotive ABS sensor according to claim 9, characterized in that, The end of the pressure ring (520) is chamfered, and the thickness after chamfering is 1-3 mm less than the minimum thickness of the cavity (140) in its natural state.

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