A sensor guard and an electric power steering

Abstract

The utility model provides a kind of sensor protection device and electric steering gear, it is related to automobile steering system technical field, the sensor protection device includes shell and protective cap, the shell is equipped with the accommodating cavity that is penetrated along the axial direction in the shell, the accommodating cavity is used to accommodate sensor, the end face of the shell is equipped with at least two sealing grooves, the protective cap is equipped on the shell, the protective cap is equipped with sealing portion close to the end face of the shell, the sealing portion is sealed with each sealing groove cooperation. The utility model is formed by shell and protective cap cooperation the sensor protection device, at least two sealing grooves and the sealing portion form multistage seal, effectively prevent the entry of dust and moisture, to improve sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering system technology, and in particular to a sensor protection device and an electric steering gear. Background Technology

[0002] Electric power steering (EPS) is a crucial automotive component, responsible for steering and normal driving. It comprises the steering gear body, steering tie rods, power assist module, and sensors. The sensors detect the vehicle's steering angle and speed, helping the driver better control the vehicle. Sensor protection devices are a vital part of EPS sensors, requiring excellent sealing performance to prevent dust and moisture ingress, ensuring proper sensor operation. This is especially important for off-road vehicles, which are heavier, have larger wheel-side suspension travel, and experience greater tie rod swing angles. Off-road vehicles often encounter harsh conditions, placing significant impact on the steering tie rods. During off-road driving, the steering gear frequently encounters water, mud, and puddles, placing a considerable challenge on the sensor's sealing performance, thus requiring even higher standards of sealing.

[0003] Existing sensor protection devices have poor sealing performance, making it difficult to meet the sealing performance requirements of protection devices under working conditions such as wading and crossing rivers. Utility Model Content

[0004] This utility model provides a sensor protection device and an electric steering gear to solve the technical problem of poor sealing performance of sensor protection devices in related technologies.

[0005] In a first aspect, embodiments of the present invention provide a sensor protection device, comprising:

[0006] The housing has an axially extending cavity for accommodating a sensor, and the end face of the housing has at least two sealing grooves.

[0007] A protective cap is provided on the housing, and a sealing part is provided on the end face of the protective cap near the housing, and the sealing part is sealed and fitted with each of the sealing grooves.

[0008] In some embodiments, the sealing portion includes: a first sealing lip and a second sealing lip;

[0009] The first sealing lip and the second sealing lip respectively correspond to the two sealing grooves to form a sealing fit.

[0010] In some embodiments, the first sealing lip includes:

[0011] The first sealing lip body is an annular groove, and the sealing groove is an annular flange adapted to the annular groove.

[0012] The first protrusion is arranged around the outside of the first sealing lip, and the first protrusion is inclined upward.

[0013] In some embodiments, the second sealing lip includes:

[0014] The second sealing lip is an annular flange adapted to the corresponding annular groove;

[0015] The second protrusion and the third protrusion are longitudinally spaced and arranged around the outside of the second sealing lip, and the second protrusion and the third protrusion are inclined upward.

[0016] The fourth protrusion is arranged around the inner side of the second sealing lip and is inclined downward.

[0017] In some embodiments, the housing further includes:

[0018] At least three concentric annular ribs are provided, and a sealing groove is provided between two adjacent annular ribs. The height of the three annular ribs gradually decreases from the inside to the outside.

[0019] In some embodiments, the height of each of the annular ribs is 1.5-2 mm higher than the outermost adjacent annular rib.

[0020] In some embodiments, the protective cap is made of fluororubber.

[0021] In some embodiments, the bottom of the housing has at least two mounting through holes.

[0022] In some embodiments, the housing is made of plastic.

[0023] Secondly, this utility model embodiment also provides an electric steering system, including the aforementioned sensor protection device.

[0024] The beneficial effects of the technical solution provided by this utility model include:

[0025] This utility model provides a sensor protection device and an electric steering gear. The sensor protection device includes a housing and a protective cap. The housing has an axially penetrating cavity for accommodating a sensor. At least two sealing grooves are provided on the end face of the housing. The protective cap is disposed on the housing, and a sealing portion is provided on the end face of the protective cap near the housing. The sealing portion seals with each of the sealing grooves. This utility model uses the housing and protective cap together to form the sensor protection device. The at least two sealing grooves and the sealing portion form a multi-stage seal, effectively preventing the ingress of dust and moisture, thereby improving sealing performance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A cross-sectional schematic diagram of a sensor protection device provided in an embodiment of this utility model;

[0028] Figure 2 A schematic diagram of a housing provided for an embodiment of this utility model;

[0029] Figure 3 A schematic diagram of a protective cap provided for an embodiment of this utility model;

[0030] Figure label:

[0031] 1. Housing; 11. Receiving cavity; 12. Sealing groove; 13. Annular rib; 14. Mounting through hole;

[0032] 2. Protective cap; 21. Sealing part; 211. First sealing lip; 2111. First sealing lip body; 2112. First protrusion; 212. Second sealing lip; 2121. Second sealing lip body; 2122. Second protrusion; 2123. Third protrusion; 2124. Fourth protrusion;

[0033] 3. Sensors. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] This utility model provides a sensor protection device and an electric steering gear, which can solve the technical problem of poor sealing performance of sensor protection devices in related technologies.

[0036] See Figure 1 , Figure 2 and Figure 3 As shown in the figure, this utility model provides a sensor protection device, which includes a housing 1 and a protective cap 2. The housing 1 has a receiving cavity 11 extending axially through the housing 1, which is used to accommodate a sensor 3. The end face of the housing 1 has at least two sealing grooves 12. The protective cap 2 is disposed on the housing 1, and the protective cap 2 has a sealing part 21 near the end face of the housing 1. The sealing part 21 is in a sealing fit with each of the sealing grooves 12. This utility model forms the sensor protection device by the cooperation of the housing 1 and the protective cap 2. The at least two sealing grooves 12 and the sealing part 21 form a multi-level seal, effectively preventing the ingress of dust and moisture, thereby improving the sealing performance.

[0037] This utility model provides a sensor protection device, which includes a housing and a protective cap. The housing has an axially extending cavity for accommodating a sensor. At least two sealing grooves are provided on the end face of the housing. The protective cap is disposed on the housing, and a sealing portion is provided on the end face of the protective cap near the housing. The sealing portion seals with each of the sealing grooves. This utility model, with the housing and protective cap working together to form the sensor protection device, provides a multi-level seal through the at least two sealing grooves and the sealing portion, effectively preventing the ingress of dust and moisture, thereby improving sealing performance.

[0038] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1As shown, the sealing part 21 includes a first sealing lip 211 and a second sealing lip 212, which respectively form a sealing fit with the two sealing grooves 12. In this embodiment of the invention, at least two sealing grooves 12 and a first sealing lip 211 and a second sealing lip 212 corresponding to each sealing groove 12 are provided to form a multi-stage seal, improve the sealing effect, avoid malfunctions caused by the ingress of mud and water, and extend the service life of the sensor.

[0039] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 As shown, the first sealing lip 211 includes a first sealing lip body 2111 and a first protrusion 2112. The sealing groove 12 is an annular groove, and the first sealing lip body 2111 is an annular flange adapted to the annular groove. The first protrusion 2112 is arranged around the outside of the first sealing lip body 2111, and the first protrusion 2112 is inclined upward. The first sealing lip body 2111 and the first protrusion 2112 of the first sealing lip 211 form an interference fit with the corresponding sealing groove 12 to ensure the sealing effect. In this embodiment of the present invention, grease is applied to the interference fit position to eliminate the friction between the first sealing lip 211 and the sealing groove 12 while satisfying the sealing requirement. The upward inclination of the first protrusion 2112 is beneficial for the isolation and discharge of impurities such as sludge and water.

[0040] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1As shown, the second sealing lip 212 includes a second sealing lip body 2121, a second protrusion 2122, a third protrusion 2123, and a fourth protrusion 2124. The second sealing lip body 2121 is an annular flange adapted to the corresponding annular groove. The second protrusion 2122 and the third protrusion 2123 are longitudinally spaced and arranged around the outside of the second sealing lip body 2121. The second protrusion 2122 and the third protrusion 2123 are inclined upward. The fourth protrusion 2124 is arranged around the inside of the second sealing lip body 2121 and is inclined downward. In this embodiment of the present invention, the first sealing lip 2111, the second sealing lip 2121, the second protrusion 2122, the third protrusion 2123, and the fourth protrusion 2124 of the second sealing lip 212 form an interference fit with the corresponding sealing groove 12 to ensure the sealing effect. In this embodiment of the present invention, grease is applied to the interference fit position to eliminate friction between the second sealing lip 212 and the sealing groove 12 while satisfying the sealing requirement. The second protrusion 2122 and the third protrusion 2123 are inclined upwards, and the fourth protrusion 2124 is inclined downwards, which is beneficial for the isolation and discharge of impurities such as sludge and water. At the same time, it can reduce the decline in sealing performance caused by improper installation or long-term use, and further improve the sealing effect and reliability of the protective device.

[0041] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 2 As shown, the housing 1 also includes at least three concentric annular ribs 13, and a sealing groove 12 is provided between two adjacent annular ribs 13. The height of the three annular ribs 13 gradually decreases from the inside to the outside, further preventing external impurities from entering and improving the sealing effect.

[0042] As an optional implementation, in one embodiment of the invention, the height of each of the annular ribs 13 is 1.5-2 mm higher than the adjacent annular ribs 13 on the outside. The reasonable height difference enables the protective structure to resist high-pressure water spray and mud impact, thereby improving the sealing performance.

[0043] As an optional implementation in one embodiment of the invention, the protective cap 2 is made of fluororubber. The use of fluororubber in this embodiment provides excellent chemical corrosion resistance, ensuring the protective cap 2 maintains stable sealing performance over a long period in complex working environments. Furthermore, the high elasticity and anti-aging properties of fluororubber extend the service life of the protective cap 2, reduce maintenance frequency, and improve reliability and environmental adaptability.

[0044] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1As shown, the bottom of the housing 1 is provided with at least two mounting through holes 14. By providing mounting through holes, the housing 1 can be detached, thereby improving flexibility.

[0045] As an optional implementation, in one embodiment of the utility model, the housing 1 is made of plastic. The plastic housing 1 is lightweight, reducing the overall structural weight and facilitating installation and portability. Its insulation properties ensure the stability of the sensor signal. Furthermore, the plastic material can withstand harsh environments such as humidity and acid / alkali conditions, ensuring the reliability of the sensor's protective structure.

[0046] This utility model embodiment also provides an electric steering system, which includes a sensor protection device. The sensor protection device includes a housing 1 and a protective cap 2. The housing 1 has a receiving cavity 11 extending axially through the housing 1, which is used to receive a sensor 3. The end face of the housing 1 has at least two sealing grooves 12. The protective cap 2 is disposed on the housing 1, and the protective cap 2 has a sealing part 21 near the end face of the housing 1. The sealing part 21 is in a sealing fit with each of the sealing grooves 12. This utility model uses the housing 1 and the protective cap 2 to form the sensor protection device. The at least two sealing grooves 12 and the sealing part 21 form a multi-level seal, effectively preventing the ingress of dust and moisture, thereby improving the sealing performance.

[0047] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] It should be noted that in this invention, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A sensor protection device, characterized in that, include: The housing (1) has a receiving cavity (11) extending axially through the housing (1) for accommodating the sensor (3), and the end face of the housing (1) has at least two sealing grooves (12). A protective cap (2) is provided on the housing (1). The protective cap (2) has a sealing part (21) on the end face of the protective cap (2) near the housing (1). The sealing part (21) is sealed and fitted with each of the sealing grooves (12).

2. The sensor protection device according to claim 1, characterized in that: The sealing part (21) includes: a first sealing lip (211) and a second sealing lip (212); The first sealing lip (211) and the second sealing lip (212) respectively form a sealing fit with the two sealing grooves (12).

3. A sensor protection device according to claim 2, characterized in that, The first sealing lip (211) includes: The first sealing lip (2111) is an annular groove, and the sealing groove (12) is an annular flange adapted to the annular groove. The first protrusion (2112) is arranged around the outside of the first sealing lip (2111), and the first protrusion (2112) is inclined upward.

4. A sensor protection device according to claim 3, characterized in that, The second sealing lip (212) includes: The second sealing lip (2121) is an annular flange adapted to the corresponding annular groove; The second protrusion (2122) and the third protrusion (2123) are longitudinally spaced and arranged around the outside of the second sealing lip (2121), and the second protrusion (2122) and the third protrusion (2123) are inclined upward. The fourth protrusion (2124) is arranged around the inner side of the second sealing lip (2121) and is inclined downward.

5. A sensor protection device according to claim 1, characterized in that, The housing (1) further includes: At least three concentric annular ribs (13) are provided, and a sealing groove (12) is provided between two adjacent annular ribs (13). The height of the three annular ribs (13) gradually decreases from the inside to the outside.

6. A sensor protection device according to claim 5, characterized in that: The height of each of the aforementioned annular ribs (13) is 1.5-2 mm higher than that of the outermost adjacent annular rib (13).

7. A sensor protection device according to claim 1, characterized in that: The protective cap (2) is made of fluororubber.

8. A sensor protection device according to claim 1, characterized in that: The bottom of the housing (1) is provided with at least two mounting through holes (14).

9. A sensor protection device according to claim 1, characterized in that: The housing (1) is made of plastic.

10. An electric steering system, characterized in that, Includes a sensor protection device as described in any one of claims 1-9.

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