A seal arrangement for a steering system assembly location

Abstract

The utility model relates to a steering system technical field, concretely is a kind of sealing structure for steering system assembly position.A kind of sealing structure for steering system assembly position, it is characterized by:the sealing structure is double O type ring sealing structure, double O type ring sealing structure includes double O type ring sealing structure one, double O type ring sealing structure two, double O type ring sealing structure one is installed between motor casing and ECU casing;Double O type ring sealing structure two is installed between motor casing and servo casing.Compared with prior art, provide a kind of sealing structure for steering system assembly position, adopt double O type ring design, significantly improve the sealing performance.Under complex working conditions, such as vibration, temperature change and pressure fluctuation etc., double O type ring can cooperate with each other, form double sealing barrier, effectively prevent the problem such as air leakage, liquid leakage etc., to improve the reliability and stability of equipment, prolong the service life of equipment, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of steering system technology, specifically a sealing structure for the assembly position of a steering system. Background Technology

[0002] In existing motor housing and ECU housing (or servo housing) assembly technologies, a single O-ring is typically used for sealing. However, in actual testing, the single O-ring sealing structure has certain limitations. Due to the complex operating conditions of motors, such as vibration, temperature changes, and pressure fluctuations, the sealing performance of a single O-ring is insufficient to meet high reliability requirements. Especially in applications requiring high precision and reliability, such as automotive engine control systems and industrial automation equipment, the single O-ring sealing structure is prone to air leakage and liquid seepage, leading to test failures, affecting the normal operation and lifespan of the equipment, and increasing maintenance costs and safety hazards. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a sealing structure for the assembly position of the steering system, which adopts a double O-ring design, significantly improving the sealing performance.

[0004] To achieve the above objectives, a sealing structure for the assembly position of a steering system is designed, characterized in that: the sealing structure is a double O-ring sealing structure, which includes a first double O-ring sealing structure and a second double O-ring sealing structure. The first double O-ring sealing structure is installed between the motor housing and the ECU housing; the second double O-ring sealing structure is installed between the motor housing and the servo housing.

[0005] The aforementioned double O-ring sealing structure consists of two O-rings. The first O-ring and the second O-ring are arranged radially along the assembly surface of the motor housing and the ECU housing, and a certain distance is provided between the first O-ring and the second O-ring.

[0006] The distance between the first O-ring and the second O-ring is 1mm to 5mm, preferably 2mm to 3mm.

[0007] The cross-sectional shape of both the first O-ring and the second O-ring is circular.

[0008] The motor housing and ECU housing are respectively provided with a first sealing groove that matches the first O-ring and the second O-ring on their assembly surfaces. The cross-sectional shape of the first sealing groove is rectangular, and the depth and width of the first sealing groove match the first O-ring and the second O-ring.

[0009] The double O-ring sealing structure consists of two O-rings. The third and fourth O-rings are arranged radially along the mating surfaces of the motor housing and the servo housing, and there is a certain gap between the third and fourth O-rings.

[0010] The spacing between the third and fourth O-rings is 1mm to 5mm, preferably 2mm to 3mm.

[0011] The cross-sectional shape of the third and fourth O-rings is circular.

[0012] The motor housing and the servo housing are connected by bolts. The assembly surfaces of the motor housing and the servo housing are respectively provided with second sealing grooves that match the third O-ring and the fourth O-ring. The cross-sectional shape of the second sealing groove is rectangular, and the depth and width of the second sealing groove match the third O-ring and the fourth O-ring.

[0013] The first, second, third, and fourth O-rings are made of high-performance rubber materials.

[0014] Compared with existing technologies, this utility model provides a sealing structure for the assembly position of a steering system, employing a double O-ring design, which significantly improves sealing performance. Under complex operating conditions, such as vibration, temperature changes, and pressure fluctuations, the double O-rings can cooperate to form a double sealing barrier, effectively preventing air leakage, liquid seepage, and other problems, thereby improving the reliability and stability of the equipment, extending its service life, and reducing maintenance costs.

[0015] In addition, this utility model has a simple structure, is easy to process and install, and has high practicality and economy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mounting structure between the motor housing and the ECU housing.

[0017] Figure 2 This is a cross-sectional view of the mounting structure of the motor housing and the ECU housing.

[0018] Figure 3 for Figure 2 An enlarged diagram of A in the diagram.

[0019] Figure 4 This is a schematic diagram of the servo housing structure.

[0020] Figure 5 This is a cross-sectional view of the mounting structure for the motor housing and the servo housing.

[0021] Figure 6 for Figure 5 Enlarged diagram of B in the diagram. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 6 As shown, a sealing structure for the assembly position of a steering system is a double O-ring sealing structure, which includes a first double O-ring sealing structure and a second double O-ring sealing structure. The first double O-ring sealing structure is installed between the motor housing 1 and the ECU housing 2; the second double O-ring sealing structure is installed between the motor housing 1 and the servo housing 6.

[0024] like Figures 1 to 3 As shown, the double O-ring sealing structure consists of two O-rings. The first O-ring 3 and the second O-ring 4 are arranged in sequence along the radial direction of the assembly surface of the motor housing 1 and the ECU housing 2, and there is a certain gap between the first O-ring 3 and the second O-ring 4.

[0025] The distance between the first O-ring 3 and the second O-ring 4 is 1mm to 5mm, preferably 2mm to 3mm.

[0026] The cross-sectional shape of the first O-ring 3 and the second O-ring 4 is circular.

[0027] The motor housing 1 and the ECU housing 2 are respectively provided with a first sealing groove 5 that matches the first O-ring 3 and the second O-ring 4. The cross-sectional shape of the first sealing groove 5 is rectangular, and the depth and width of the first sealing groove 5 match the first O-ring 3 and the second O-ring 4.

[0028] like Figure 2 As shown, the double O-ring sealing structure at the motor and ECU assembly position of this utility model includes a motor housing 1, an ECU housing 2, and a sealing structure disposed at the assembly position of the two. The sealing structure consists of two O-rings, a first O-ring 3 and a second O-ring 4. The first O-ring 3 and the second O-ring 4 are arranged radially along the motor and ECU assembly surfaces, maintaining a certain distance of 2mm between them. Both the first O-ring 3 and the second O-ring 4 have a circular cross-sectional shape and are made of nitrile rubber, possessing good elasticity and oil resistance.

[0029] like Figure 3 As shown, the motor housing 1 and the ECU housing 2 are respectively provided with first sealing grooves 5 that match the first O-ring 3 and the second O-ring 4. The cross-sectional shape of the first sealing groove 5 is rectangular, and its depth and width are designed according to the size of the first O-ring 3 and the second O-ring 4 and the sealing requirements. The first O-ring 3 and the second O-ring 4 are respectively installed in the corresponding first sealing grooves 5, and the assembly force of the motor housing 1 and the ECU housing 2 causes them to undergo elastic deformation, thereby achieving a seal.

[0030] In the actual assembly process, the first O-ring 3 and the second O-ring 4 are first installed in the first sealing groove 5 of the motor housing 1 and the ECU housing 2 respectively. Then, the motor housing 1 and the ECU housing 2 are assembled. The O-rings are elastically deformed by the assembly force. Finally, the motor housing 1 and the ECU housing 2 are fixed together by the heat fitting process to complete the assembly.

[0031] Through the above embodiments, the double O-ring sealing structure at the motor and ECU assembly position of this utility model exhibits good sealing performance in practical applications, effectively preventing problems such as air leakage and liquid seepage, improving the reliability and stability of the equipment, and possessing high practicality and economy.

[0032] like Figures 4 to 6 As shown, the double O-ring sealing structure II consists of two O-rings. The third O-ring 7 and the fourth O-ring 8 are arranged in sequence along the radial direction of the mating surfaces of the motor housing 1 and the servo housing 6, and there is a certain gap between the third O-ring 7 and the fourth O-ring 8.

[0033] The spacing between the third O-ring 7 and the fourth O-ring 8 is 1mm to 5mm, preferably 2mm to 3mm.

[0034] The cross-sectional shape of the third O-ring 7 and the fourth O-ring 8 is circular.

[0035] The motor housing 1 and the servo housing 6 are connected by bolts. The mounting surfaces of the motor housing 1 and the servo housing 6 are respectively provided with second sealing grooves 9 that match the third O-ring 7 and the fourth O-ring 8. The cross-sectional shape of the second sealing groove 9 is rectangular, and the depth and width of the second sealing groove 9 match the third O-ring 7 and the fourth O-ring 8.

[0036] The first O-ring 3, the second O-ring 4, the third O-ring 7, and the fourth O-ring 8 are made of high-performance rubber materials, such as nitrile rubber.

[0037] like Figure 5 As shown, the motor housing 1 and the servo housing 6 are connected by bolts. Two O-rings are installed at the connection point: a third O-ring 7 on the inner side and a fourth O-ring 8 on the outer side. The two O-rings are installed in the second sealing grooves 9 of the motor housing 1 and the servo housing 6, respectively, and sealing is achieved by tightening the bolts. This bidirectional pressure design effectively improves sealing reliability and avoids insufficient compression or deformation caused by unilateral pressure. Simultaneously, the combination of the two O-rings disperses pressure, reducing wear and fatigue life loss of individual O-rings, thereby extending their service life.

[0038] This invention also provides an optimized installation process, including chamfering the groove to reduce friction and cleaning the O-ring surface before installation to ensure no dust or impurities adhere, thereby avoiding affecting the sealing performance. Simultaneously, the optimized installation process also includes pre-stretching the O-ring to ensure it is evenly stressed during installation, further improving the sealing effect.

[0039] O-rings are made of high-performance rubber materials (such as nitrile rubber), which have excellent heat resistance, oil resistance, and corrosion resistance to meet the needs of complex working conditions. Depending on the application, different O-ring materials can be selected to ensure optimal sealing performance.

[0040] Based on the depth, width, and compression ratio requirements of the sealing groove, the cross-sectional diameter and compression amount of the O-ring should be determined appropriately. The compression ratio is generally controlled between 30% and 80% to ensure a good sealing effect. Simultaneously, the elastic modulus and hardness of the O-ring need to be considered to ensure that it can recover a certain degree of elasticity after being compressed, thereby maintaining sealing performance.

[0041] Sealing performance tests were conducted under high pressure to verify the effectiveness of the double O-ring combination design. Test results show that this structure significantly reduces leakage rate and extends service life. Compared to a single O-ring seal structure, the double O-ring seal structure reduces leakage rate by more than 80% and extends service life by 2-3 times.

Claims

1. A sealing structure for a steering system assembly location, characterized in that: The sealing structure is a double O-ring sealing structure, which includes a double O-ring sealing structure one and a double O-ring sealing structure two. The double O-ring sealing structure one is installed between the motor housing (1) and the ECU housing (2); the double O-ring sealing structure two is installed between the motor housing (1) and the servo housing (6).

2. A sealing structure for a steering system assembly position according to claim 1, characterized in that: The double O-ring sealing structure consists of two O-rings. The first O-ring (3) and the second O-ring (4) are arranged in sequence along the radial direction of the assembly surface of the motor housing (1) and the ECU housing (2), and there is a certain gap between the first O-ring (3) and the second O-ring (4).

3. A sealing structure for a steering system assembly position according to claim 2, characterized in that: The distance between the first O-ring (3) and the second O-ring (4) is 1mm to 5mm, preferably 2mm to 3mm.

4. A sealing structure for a steering system assembly position according to claim 2, characterized in that: The cross-sectional shape of the first O-ring (3) and the second O-ring (4) is circular.

5. A sealing structure for a steering system assembly position according to claim 1, characterized in that: The motor housing (1) and ECU housing (2) are respectively provided with a first sealing groove (5) that matches the first O-ring (3) and the second O-ring (4). The cross-sectional shape of the first sealing groove (5) is rectangular, and the depth and width of the first sealing groove (5) match the first O-ring (3) and the second O-ring (4).

6. A sealing structure for a steering system assembly position according to claim 1, characterized in that: The double O-ring sealing structure consists of two O-rings. The third O-ring (7) and the fourth O-ring (8) are arranged in sequence along the radial direction of the mating surfaces of the motor housing (1) and the servo housing (6), and there is a certain gap between the third O-ring (7) and the fourth O-ring (8).

7. A sealing structure for a steering system assembly position according to claim 6, characterized in that: The distance between the third O-ring (7) and the fourth O-ring (8) is 1mm to 5mm, preferably 2mm to 3mm.

8. A sealing structure for a steering system assembly position according to claim 6, characterized in that: The cross-sectional shape of the third O-ring (7) and the fourth O-ring (8) is circular.

9. A sealing structure for a steering system assembly position according to claim 1, characterized in that: The motor housing (1) and the servo housing (6) are connected by bolts. The assembly surfaces of the motor housing (1) and the servo housing (6) are respectively provided with second sealing grooves (9) that match the third O-ring (7) and the fourth O-ring (8). The cross-sectional shape of the second sealing groove (9) is rectangular, and the depth and width of the second sealing groove (9) match the third O-ring (7) and the fourth O-ring (8).

10. A sealing structure for a steering system assembly position according to any one of claims 2 to 9, characterized in that: The first O-ring (3), the second O-ring (4), the third O-ring (7), and the fourth O-ring (8) are made of high-performance rubber materials.

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