ESP yaw velocity sensor with high sealing performance
By employing a combination of a sealing cover and wire seals in the ESP yaw rate sensor, the problem of insufficient sealing in harsh environments is solved, achieving strong sealing and convenient maintenance, and extending the sensor's service life and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI BOTAI MICROELECTRONICS CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-05-19
AI Technical Summary
Existing ESP yaw rate sensors are prone to moisture, humidity, and dust seeping in from the connection between the housing and the cover or the connection between the wires and the housing in humid and dusty environments, affecting the lifespan and control accuracy of the internal MEMS gyroscope chip.
The structure employs a combination of sealing cover, wire seals, and connectors, including seals for the outer frame, middle frame, and inner frame. Through primary, secondary, and final sealing, it ensures a strong seal between the outer shell and the sealing cover, and prevents moisture and dust from entering through the wire seals.
It effectively prevents external moisture and dust from entering the sensor, extending its service life and improving control accuracy, while also facilitating the replacement and disassembly of the seals.
Smart Images
Figure CN224263226U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sensors, specifically to a highly sealed ESP yaw rate sensor. Background Technology
[0002] With the widespread application of Electronic Stability Program (ESP) systems, the yaw rate sensor, as its core sensing element, plays a crucial role in vehicle dynamic control. A typical yaw rate sensor includes a housing, a cover sealing one end of the housing, and a MEMS gyroscope chip housed within the housing. The yaw rate sensor detects the vehicle's rotational angular velocity around its vertical axis and transmits the signal via wires to the external vehicle control system (ESP control unit). However, in current real-world applications, ESP yaw rate sensors are frequently exposed to harsh environments such as humidity and dust. This allows moisture, humidity, and dust to easily seep into the housing through the connection between the housing and the cover, or the connection between the wires and the housing, affecting the internal MEMS gyroscope chip and other electrical components, reducing the sensor's lifespan and the accuracy of ESP control. Therefore, we propose a highly sealed ESP yaw rate sensor. Utility Model Content
[0003] The purpose of this invention is to provide a highly sealed ESP yaw rate sensor, which solves the technical problem that existing yaw rate sensors are exposed to harsh environments such as humidity and dust in real vehicle applications for a long time. This makes it easy for external moisture, humidity, and dust to seep into the housing from the connection between the housing and the cover or the connection between the wires and the housing, affecting the use of internal MEMS gyroscope chips and other electrical components, reducing the lifespan of the sensor and the accuracy of ESP control.
[0004] This utility model achieves the above objectives through the following technical solutions:
[0005] A highly sealed ESP yaw rate sensor includes a housing and a sensor electrical assembly disposed within the housing. The outer wall of the housing is provided with an opening for the wires of the sensor electrical assembly to pass through. The sensor electrical assembly also includes a sealing cover for sealing one end of the housing and a wire seal on the housing for sealing the connection between the wires and the housing.
[0006] The sealing cover includes a plate body, and an outer frame portion, a middle frame portion, and an inner frame portion integrally disposed on one side of the plate body from the outside to the inside. The outer frame portion is interference-fitted onto the outside of the outer shell. One end of the outer shell has a groove for accommodating the middle frame portion. The inner frame portion is interference-fitted against the inner wall of the outer shell. Sealing elements are embedded in the inner wall of the outer frame portion, the outer walls on both sides of the middle frame portion, and the outer wall of the inner frame portion.
[0007] A further improvement is that the sealing element includes a frame-shaped sealing strip and a frame-shaped retaining strip integrated on one side of the sealing strip. The inner wall of the outer frame, the outer walls on both sides of the middle frame, and the outer wall of the inner frame are all provided with retaining grooves that cooperate with the retaining strip. The inner and outer walls of the outer shell and the inner wall of the groove are all provided with sealing grooves that cooperate with the sealing strip.
[0008] A further improvement is that the wire seal includes a second sealing ring embedded in the opening for sealing the connection between the wire and the housing, a slider symmetrically slidably disposed on the side wall of the housing and located at both ends of the wire, a pressure plate detachably connected to the slider, and an elastic connector connecting the slider and the housing. The pressure plate has an arc-shaped groove at one end facing the wire, and an arc-shaped sealing ring three is embedded in the arc-shaped groove for contacting the outer wall of the wire. An arc-shaped sealing ring four is embedded on one side of the pressure plate for contacting the outer wall of the housing.
[0009] A further improvement is that the sealing cover and the outer shell are detachably connected by a connector located on the side wall of the outer frame.
[0010] A further improvement is that the connector includes a magnetic connecting post that penetrates the side wall of the outer frame. The outer wall of the magnetic connecting post is fitted with a sealing ring for sealing the connection between the magnetic connecting post and the outer frame. The side wall of the outer shell has a blind hole for one end of the magnetic connecting post to enter. The inner wall of the blind hole is symmetrically provided with an arc-shaped block. The outer wall of the end of the magnetic connecting post located in the blind hole is symmetrically provided with an arc-shaped block that cooperates with the arc-shaped block. The outer frame has a T-shaped opening for the magnetic connecting post to pass through. When the arc-shaped block is rotated with the magnetic connecting post to a misalignment with the arc-shaped block, it can axially disengage from the blind hole and enter the T-shaped opening.
[0011] A further improvement is that the housing is provided with a partition plate to divide the inner cavity of the housing into a mounting cavity for mounting sensor electrical components and a receiving cavity for accommodating the outer wall of the wire portion.
[0012] A further improvement is that the inner wall of the outer frame portion away from the plate is detachably provided with a frame-shaped sponge member for contacting the outer wall of the outer shell.
[0013] The beneficial effects of this utility model are as follows:
[0014] This invention features a sealing cover and outer shell that form a primary seal through a seal between the outer frame and the outer shell, a secondary seal through a seal between the middle frame and the groove, and a final seal through a seal between the inner frame and the inner wall of the outer shell. This enhances the sealing performance of the entire sealing cover and outer shell connection. Furthermore, a wire seal seals the connection between the wire and the outer shell, effectively preventing external moisture, humidity, and dust from penetrating into the outer shell from the connection between the outer shell and the cover or the connection between the wire and the outer shell. This prevents the internal MEMS gyroscope chip and other electrical components from being affected, extending the lifespan and accuracy of the ESP yaw rate sensor. Additionally, the sealing cover and outer shell are connected by a connector, facilitating quick and easy disassembly and replacement of the seal, ensuring that the ESP yaw rate sensor maintains its strong sealing performance effectively over a long period. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the ESP yaw rate sensor structure of this utility model;
[0016] Figure 2 This utility model Figure 1 Structural sectional view;
[0017] Figure 3 This is a cross-sectional view of the sealing cover plate structure in this utility model;
[0018] Figure 4 This utility model Figure 3 Enlarged view of structure A in the image;
[0019] Figure 5 This is a schematic diagram of the wire sealing component structure in this utility model;
[0020] Figure 6 This is a schematic diagram of the connector structure in this utility model.
[0021] In the diagram: 1. Outer shell; 2. Sensor electrical assembly; 3. Sealing cover; 31. Plate; 32. Outer frame; 33. Middle frame; 34. Inner frame; 35. Seal; 351. Sealing strip; 352. Clip; 36. Sponge; 37. Blind hole; 4. Connector; 41. Magnetic connecting post; 42. Sealing ring one; 43. Arc block one; 44. Arc block two; 5. Wire seal; 51. Sealing ring two; 52. Slider; 53. Elastic connector; 54. Pressure plate; 55. Sealing ring three; 56. Sealing ring four; 6. Receiving cavity. Detailed Implementation
[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0023] Example 1
[0024] Please see the appendix Figure 1-4 A highly sealed ESP yaw rate sensor includes a housing 1 and a sensor electrical component 2 disposed within the housing 1. The housing 1 is preferably made of materials such as aluminum, stainless steel or high-strength plastic. The sensor electrical component 2 is a conventional structure in ESP yaw rate sensors in this field, including components such as a MEMS gyroscope chip and a signal processing circuit board (connected to an external vehicle control system via wires), which will not be described in detail here.
[0025] The outer wall of the housing 1 is provided with an opening for the wires of the sensor electrical assembly 2 to pass through. It also includes a sealing cover plate 3 for sealing one end of the housing 1 (the other end of the housing 1 is closed) and a wire seal 5 provided on the housing 1 for sealing the connection between the wires and the housing 1. The sealing cover plate 3 and the wire seal 5 effectively prevent external moisture, humidity or dust from entering the housing 1 from the connection between the sealing cover plate 3 and the housing 1 or the connection between the wires and the housing 1, which may affect the stable use of the sensor electrical assembly 2 and improve the sealing performance of the ESP yaw rate sensor.
[0026] The sealing cover 3 includes a plate 31, and an outer frame portion 32, a middle frame portion 33, and an inner frame portion 34 integrally disposed on one side of the plate 31 from the outside to the inside. The outer frame portion 32, the middle frame portion 33, and the inner frame portion 34 all have a rectangular cross-section. The outer frame portion 32 is interference-fitted onto the outside of the outer shell 1, and its inner wall is fitted against the outer wall of the outer shell 1. One end of the outer shell 1 has a groove for accommodating the middle frame portion 33, and the inner frame portion 34 is interference-fitted into place. Sealing elements 35 are embedded in the inner wall of the outer shell 1, the inner wall of the outer frame 32, the outer walls on both sides of the middle frame 33, and the outer wall of the inner frame 34. In this manner, a primary seal is formed by the sealing element 35 between the outer frame 32 and the outer shell 1, a secondary seal is formed by the sealing element 35 between the middle frame 33 and the groove, and a final seal is formed by the sealing element 35 between the inner frame 34 and the inner wall of the outer shell 1, thus ensuring a strong seal at the connection between the sealing cover 3 and the outer shell 1.
[0027] Preferably, the sealing element 35 in this embodiment includes a frame-shaped sealing strip 351 and a frame-shaped retaining strip 352 integrally disposed on one side of the sealing strip 351. The inner wall of the outer frame portion 32, the outer walls on both sides of the middle frame portion 33, and the outer wall of the inner frame portion 34 are all provided with retaining grooves that cooperate with the retaining strip 352. The inner and outer walls of the outer shell 1 and the inner wall of the groove are all provided with sealing grooves that cooperate with the sealing strip 351. The sealing performance is improved by the cooperation of the sealing strip 351 and the sealing groove. The vertical cross-section of the retaining strip 352 and the retaining groove is T-shaped so that the sealing strip 351 can be disassembled and replaced when it is damaged. Both the sealing strip 351 and the retaining strip 352 can be made of rubber material.
[0028] Preferably, the wire seal 5 in this embodiment includes a sealing ring 51 (which may be made of rubber material) embedded in the opening to seal the connection between the wire and the outer casing 1, sliders 52 symmetrically slidably disposed on the side wall of the outer casing 1 and located at both ends of the wire, a pressure plate 54 detachably connected to the sliders 52, and an elastic connector 53 connecting the sliders 52 and the outer casing 1. Specifically, the side wall of the outer casing 1 is provided with a groove adapted to the sliders 52. The pressure plate 54 and the sliders 52 may be connected by, for example, a bolt or screw. The elastic connector 53 includes, for example, a guide rod disposed in the groove and movably passing through the slider 52, and a spring sleeved on the outer wall of the guide rod, one end of which is connected to the inner wall of one side of the groove, and the other end of which is connected to the slider 52. Of course, the elastic connector 53 is not limited to the above one.
[0029] The pressure plate 54 has an arc-shaped groove at one end facing the wire, and an arc-shaped sealing ring 55 (which can be made of rubber material) is embedded in the arc-shaped groove for contact with the outer wall of the wire. One side of the pressure plate 54 is attached to the outer wall of the outer shell 1, and an arc-shaped sealing ring 56 (which can be made of rubber material) is embedded in the other side of the pressure plate 54 for contact with the outer wall of the outer shell 1. Under the action of the elastic connector 53, the two pressure plates 54 clamp the wire through the arc-shaped groove, and at the same time, the arc-shaped sealing ring 55 seals the wire area. The pressure plate 54 also provides a certain degree of shielding for the opening area, making it difficult for external moisture, humidity and dust to enter the outer shell 1 from the connection between the wire and the outer shell 1. In addition, the arc-shaped sealing ring 56 improves the sealing performance at the contact point between the pressure plate 54 and the outer wall of the outer shell 1.
[0030] Preferably, in this embodiment, the inner wall of the outer frame 32 away from the plate 31 is detachably provided with a frame-shaped sponge 36 for contacting the outer wall of the outer shell 1. The sponge 36 can be snapped onto the outer frame or connected in other ways. The frame-shaped sponge 36 plays a certain role in removing moisture or humidity that permeates to the connection between the outer shell 1 and the sealing cover 3. The sponge 36 can be replaced periodically, further improving the sealing performance of the connection between the two without affecting the sealing performance of the main body (sealing member 35).
[0031] Example 2
[0032] Please see the appendix Figure 4 and Figure 6 Based on Embodiment 1, in this embodiment, the sealing cover plate 3 and the outer shell 1 are detachably connected by a connector 4. The connector 4 is provided on the side wall of the outer frame 32. Preferably, four sets of connectors 4 are provided on the four side walls of the outer frame 32.
[0033] Preferably, the connector 4 in this embodiment includes a magnetic connecting post 41 penetrating the side wall of the sealing cover plate 3. The magnetic connecting post 41 is made of magnetic material or has a permanent magnet embedded at its outer end, and can be used by being attracted by an external magnetic tool. A sealing ring 42 is embedded in the outer wall of the magnetic connecting post 41 to seal the connection between the magnetic connecting post 41 and the outer frame 32. The sealing ring 42 can be made of rubber material. A blind hole 37 is opened on the side wall of the outer shell 1 for one end of the magnetic connecting post 41 to enter. The inner wall of the blind hole 37 is symmetrically provided with arc-shaped blocks 43. The outer wall of one end of the connecting post 41 located inside the blind hole 37 is symmetrically provided with an arc-shaped block 44 that cooperates with the arc-shaped block 43. The outer frame 32 is provided with a T-shaped opening for the magnetic connecting post 41 to pass through. The diameter of one end of the T-shaped opening near the blind hole 37 is adapted to the diameter of the blind hole 37, and the diameter of the other end is smaller than the diameter of the blind hole 37, so that the arc-shaped block 44 can move with the magnetic connecting post 41 to disengage from the blind hole 37 and enter the movable opening. When the arc-shaped block 44 rotates with the magnetic connecting post 41 to the point of being misaligned with the arc-shaped block 43, it can axially disengage from the blind hole 37 and enter the T-shaped opening.
[0034] When disassembling the sealing cover 3, the magnetic connecting post 41 is attracted by an external magnetic tool. Rotating the external magnetic tool causes the magnetic connecting post 41 to rotate, causing the arc-shaped block 2 44 to be misaligned with the arc-shaped block 1 43. Then, the external magnetic tool is pulled to move the magnetic connecting post 41 outward, so that the arc-shaped block 2 44 enters the T-shaped opening along with the magnetic connecting post 41, thus separating the sealing cover 3 from the outer shell 1.
[0035] Example 3
[0036] Please see the appendix Figure 2 Based on Embodiment 1, this embodiment has a partition plate inside the outer shell 1 to divide the inner cavity of the outer shell 1 into an installation cavity for installing the sensor electrical assembly 2 and a receiving cavity 6 for accommodating the outer wall of the wire portion. By setting the receiving cavity 6, when the wire is too long, the excess wire can be stored in the receiving cavity 6, and then the wire is fixed under the clamping action of the pressure plate 54, so that the stored wire will not be pulled out during use, effectively avoiding the risks of tangling caused by the excessive length of the wire.
[0037] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A tightly sealed ESP yaw rate sensor, comprising a housing (1) and a sensor electrical assembly (2) disposed within the housing (1), wherein the outer wall of the housing (1) is provided with an opening for the wires of the sensor electrical assembly (2) to pass through, characterized in that, It also includes a sealing cover plate (3) for sealing one end of the housing (1) and a wire seal (5) provided on the housing (1) for sealing the connection between the wire and the housing (1); The sealing cover (3) includes a plate (31) and an outer frame part (32), a middle frame part (33) and an inner frame part (34) integrally disposed on one side of the plate (31) from the outside to the inside. The outer frame part (32) is interference-fitted onto the outside of the outer shell (1). One end of the outer shell (1) is provided with a groove to accommodate the middle frame part (33). The inner frame part (34) is interference-fitted against the inner wall of the outer shell (1). The inner wall of the outer frame part (32), the outer walls on both sides of the middle frame part (33) and the outer wall of the inner frame part (34) are all fitted with sealing elements (35).
2. The ESP yaw rate sensor according to claim 1, characterized in that, The sealing element (35) includes a frame-shaped sealing strip (351) and a frame-shaped retaining strip (352) integrally disposed on one side of the sealing strip (351). The inner wall of the outer frame part (32), the outer walls on both sides of the middle frame part (33) and the outer wall of the inner frame part (34) are all provided with retaining grooves that cooperate with the retaining strip (352). The inner and outer walls of the outer shell (1) and the inner wall of the groove are all provided with sealing grooves that cooperate with the sealing strip (351).
3. The ESP yaw rate sensor according to claim 1, characterized in that, The wire seal (5) includes a second sealing ring (51) embedded in the opening for sealing the connection between the wire and the outer shell (1), a slider (52) symmetrically slidably disposed on the side wall of the outer shell (1) and located at both ends of the wire, a pressure plate (54) detachably connected to the slider (52), and an elastic connector (53) connecting the slider (52) and the outer shell (1). The pressure plate (54) has an arc-shaped groove at one end facing the wire, and an arc-shaped sealing ring (55) for contacting the outer wall of the wire is embedded in the arc-shaped groove. An arc-shaped sealing ring (56) for contacting the outer wall of the outer shell (1) is embedded on one side of the pressure plate (54).
4. The ESP yaw rate sensor according to claim 1, characterized in that, The sealing cover (3) and the outer shell (1) are detachably connected by a connector (4), which is located on the side wall of the outer frame (32).
5. The ESP yaw rate sensor according to claim 4, characterized in that, The connector (4) includes a magnetic connecting post (41) that penetrates the side wall of the outer frame (32). The outer wall of the magnetic connecting post (41) is fitted with a sealing ring (42) for sealing the connection between the magnetic connecting post (41) and the outer frame (32). The side wall of the outer shell (1) is provided with a blind hole (37) for one end of the magnetic connecting post (41) to enter. The inner wall of the blind hole (37) is symmetrically provided with an arc-shaped block (43). The outer wall of the end of the magnetic connecting post (41) located in the blind hole (37) is symmetrically provided with an arc-shaped block (44) that cooperates with the arc-shaped block (43). The outer frame (32) is provided with a T-shaped opening for the magnetic connecting post (41) to pass through. When the arc-shaped block (44) rotates with the magnetic connecting post (41) to the point of being misaligned with the arc-shaped block (43), it can axially disengage from the blind hole (37) and enter the T-shaped opening.
6. The ESP yaw rate sensor according to claim 1, characterized in that, The housing (1) is provided with a partition plate to divide the inner cavity of the housing (1) into a mounting cavity for mounting the sensor electrical assembly (2) and a receiving cavity (6) for accommodating the outer wall of the wire portion.
7. The ESP yaw rate sensor according to claim 1, characterized in that, The inner wall of the outer frame part (32) away from the plate (31) is detachably provided with a frame-shaped sponge part (36) for contacting the outer wall of the outer shell (1).