A sealing structure of a steering tie rod ball head of an automobile

Abstract

The utility model relates to the technical field of automobile parts, disclose a kind of automobile steering drag link ball head sealing structure, including base and cover body, the base top is fixedly connected with backing plate, the backing plate top is fixedly connected with joint shell, the joint shell bottom is rotated with sphere, the sphere top is fixedly connected with input shaft body, the cover body top is fixedly connected with limit ring, the limit ring inner wall is equipped with sealant, the base with the cover body abuts, the base top is fixedly connected with two frames, the frame inner wall is rotatably connected with rotating shaft, the frame inner wall is fixedly connected with spring. In the utility model, by cover body and limit ring, sealant cooperation, can effectively isolate external impurities, guarantee internal component clean, backing plate can buffer vibration, improve structural stability, the rotating cooperation of sphere and ball head seat, match sealed protection, can ensure that steering is smooth, prolongs ball head assembly overall service life.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a sealing structure for the ball joint of an automotive steering tie rod. Background Technology

[0002] The steering tie rod ball joint is a core component connecting the steering system to the wheels. It must withstand steering forces and road vibrations over extended periods. Its sealing performance directly affects the retention of internal grease and the rust prevention effect. If the seal fails, dust and rainwater can penetrate the ball joint, leading to accelerated wear and even causing steering jamming and abnormal noises, threatening driving safety. Currently, the industry continuously demands higher levels of sealing reliability and ease of maintenance for steering tie rod ball joints, but there is still room for improvement in existing sealing structures. The existing automotive steering tie rod ball joint sealing structure is based on a ball joint pin and a ball joint seat. One end of the ball joint pin is connected to the tie rod body, and the other end is embedded in the ball joint seat. A rubber dust cover is fitted on the outside of the ball joint seat. The two ends of the dust cover are fixed to the outer wall of the ball joint seat and the root of the ball joint pin by clamps, forming a closed space. The closed space is filled with grease to reduce frictional wear between the ball joint pin and the ball joint seat. The overall structure relies on the elastic fit of the rubber dust cover to achieve basic sealing. First, the sealing structure lacks reliability. The rubber dust cover is prone to cracking and deformation due to long-term exposure to high and low temperatures and aging. Furthermore, the clamp fixing point is prone to loosening due to vibration, leading to seal failure. Dust and rainwater intrusion accelerates component wear. Second, there is a lack of a quick lubrication structure. Adding grease requires disassembling the dust cover or ball joint component, which is cumbersome and easily damages the original seal, resulting in low maintenance efficiency and failing to meet the convenience requirements of daily maintenance. Therefore, a new automotive steering tie rod ball joint sealing structure is proposed to solve the above problems. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides a sealing structure for the ball joint of an automotive steering tie rod, aiming to improve the lack of a sealing structure and quick lubrication in the prior art.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a sealing structure for the ball joint of an automotive steering tie rod, comprising a base and a cover. A pad is fixedly connected to the top of the base, a connector housing is fixedly connected to the top of the pad, a ball is rotatably mounted on the bottom of the connector housing, an input shaft body is fixedly connected to the top of the ball, a limit ring is fixedly connected to the top of the cover, and sealant is installed on the inner wall of the limit ring. The base abuts against the cover, two frames are fixedly connected to the top of the base, a rotating shaft is rotatably connected to the inner wall of the frames, a spring is fixedly connected to the inner wall of the frames, a fixing plate is fixedly connected to the outer wall of the rotating shaft, and a locking block is fixedly connected to the outer wall of the fixing plate. As a further description of the above technical solution: The sealant is made of fluororubber; As a further description of the above technical solution: The outer wall of the sphere is rotatably connected to the inner wall of the pad; As a further description of the above technical solution: The outer wall of the connector housing is provided with an oil injection hole, and a rubber plug is slidably connected to the inner wall of the oil injection hole; As a further description of the above technical solution: The end of the spring furthest from the frame is fixedly connected to a fixing plate.

[0005] As a further description of the above technical solution: The card block is slidably connected to the inner wall of the cover.

[0006] This utility model has the following beneficial effects: 1. In this utility model, the cover, limit ring and sealant work together to effectively isolate external impurities and ensure the cleanliness of internal components. The pad can buffer vibration and improve structural stability. The rotational cooperation between the ball, the pad and the connector housing, combined with the sealing protection, can ensure smooth steering and extend the overall service life of the ball head assembly.

[0007] 2. In this utility model, the frame provides a stable mounting base for the rotating shaft and spring. The spring, together with the rotating shaft and the fixing plate, can drive the locking block to move flexibly, which not only facilitates the quick assembly and disassembly of the cover, but also continuously locks the cover through the locking block to prevent the cover from loosening, further ensuring the stability of the overall sealing structure and strengthening the sealing and protection effect. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of a ball joint sealing structure for an automotive steering tie rod proposed in this utility model; Figure 2 This is a schematic diagram of the structure of a sealing cover for the ball joint of an automotive steering tie rod proposed in this utility model; Figure 3 This is a schematic diagram of the fixing plate for the ball joint sealing structure of an automotive steering tie rod proposed in this utility model.

[0009] Legend: 1. Base; 2. Cover; 3. Limiting ring; 4. Sealant; 5. Pad; 6. Ball; 7. Rubber plug; 8. Connector housing; 9. Oil injection hole; 10. Input shaft body; 11. Frame; 12. Rotating shaft; 13. Spring; 14. Fixing plate; 15. Locking block. Detailed Implementation

[0010] 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.

[0011] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a sealing structure for a ball joint of an automotive steering tie rod, comprising a base 1 and a cover 2. A pad 5 is fixedly connected to the top of the base 1, and a connector housing 8 is fixedly connected to the top of the pad 5. A ball 6 is rotatably mounted on the bottom of the connector housing 8, and an input shaft body 10 is fixedly connected to the top of the ball 6. A limit ring 3 is fixedly connected to the top of the cover 2, and a sealant 4 is installed on the inner wall of the limit ring 3. The base 1 and the cover 2 abut against each other. Two frames 11 are fixedly connected to the top of the base 1. A rotating shaft 12 is rotatably connected to the inner wall of the frame 11, and a spring 13 is fixedly connected to the inner wall of the frame 11. A fixing plate 14 is fixedly connected to the outer wall of the rotating shaft 12, and a locking block 15 is fixedly connected to the outer wall of the fixing plate 14. The core of this automotive steering tie rod ball joint sealing structure consists of two main bodies: the base 1 and the cover 2. The overall structure adopts a layered fixing and elastic sealing design. The base 1 has a rigid connection to a pad 5 at the top. The pad 5 not only provides structural support, but also has a fixed connection to the connector housing 8 at the top, forming a stable assembly base from top to bottom. The bottom of the connector housing 8 is rotatably connected to the ball 6. This rotatable connection provides a key degree of freedom for adjusting the steering angle, while the top of the ball 6 is fixedly connected to the input shaft body 10, ensuring that the steering force can be efficiently transmitted to the core components.

[0012] To address sealing and assembly requirements, a limiting ring 3 is fixedly connected to the top of the cover 2. Sealant 4 is specially installed on the inner wall of the limiting ring 3. When the cover 2 abuts against the base 1, the sealant 4 tightly adheres to the outer wall of the input shaft body 10, forming the first line of defense. Simultaneously, two frames 11 are symmetrically fixed to the top of the base 1. Each frame 11 has a double-connection structure on its inner wall: one side rotatably connects to the rotating shaft 12, and the other side fixedly connects to a spring 13. A fixing plate 14 is fixedly connected to the outer wall of the rotating shaft 12. The end of the spring 13 furthest from the frame 11 is connected to the fixing plate 14, and a locking block 15 is also fixedly connected to the outer wall of the fixing plate 14. During assembly, the locking block 15 engages with a pre-set slot on the cover 2. The elastic preload of the spring 13 keeps the fixing plate 14 in a stable locking state, ensuring a tight fit between the base 1 and the cover 2, further enhancing overall sealing and structural stability.

[0013] Reference Figure 1 and Figure 3The sealant 4 is made of fluororubber, which is resistant to high and low temperatures, anti-aging, and oil stains, and can fit tightly with the input shaft body 10 to prevent impurities from entering. The base 1 abuts against the cover 2. The frame 11, rotating shaft 12, spring 13, and fixing plate 14 with locking block 15 on the base 1 can achieve a stable locking between the two and ensure the sealing effect.

[0014] Reference Figure 1 and Figure 2 The outer wall of the sphere 6 is rotatably connected to the inner wall of the pad 5. The pad 5 at the top of the base 1 is the core support component, and its inner wall is rotatably connected to the outer wall of the sphere 6. This fit provides the sphere 6 with flexible rotation space to adapt to turning movements, and also restricts the offset of the sphere 6, thus providing a solid and stable foundation for the assembly of the sphere 6 and the connector housing 8.

[0015] Reference Figure 1 and Figure 2 The outer wall of the connector housing 8 is provided with an oil filling hole 9, and a rubber plug 7 is slidably connected to the inner wall of the oil filling hole 9. The rubber plug 7 can be easily removed when filling with oil, and can be reset after filling with oil to ensure a tight seal to prevent leakage and isolate impurities.

[0016] Reference Figure 1 and Figure 3 The end of the spring 13 away from the frame 11 is fixedly connected to the fixing plate 14. This connection method allows the spring 13 to continuously provide elastic force to the fixing plate 14, ensuring the reset capability of the fixing plate 14 when it rotates around the pivot 12, thereby stabilizing the locking effect of the locking block 15 on the cover 2.

[0017] Reference Figure 1 and Figure 3 The locking block 15 is slidably connected to the inner wall of the cover 2, and can slide flexibly with the assembly or turning of the cover 2, which not only adapts to the installation requirements, but also continuously fits the cover 2, helping to maintain a stable connection between the cover 2 and the base 1.

[0018] Working Principle: This structure uses a base 1 and a cover 2 as its core frame 11, ensuring stable steering transmission and multiple layers of sealing protection during operation. The pad 5 on top of the base 1 serves both as support and limiting element; its inner wall rotates with the outer wall of the ball 6, and the bottom of the ball 6 is fixed to the connector housing 8 fixed to the top of the pad 5. This double constraint ensures that the ball 6 can rotate flexibly to adapt to steering angle adjustments while preventing it from deviating. The top of the ball 6 connects to the input shaft body 10, which can efficiently transmit steering force to the core components, achieving precise transmission of steering actions.

[0019] In terms of sealing and protection, after the cover 2 abuts against the base 1, the fluororubber sealant 4 on the inner wall of the top limiting ring 3 tightly adheres to the outer wall of the input shaft body 10, forming the first line of defense against dust and moisture intrusion. At the same time, the two symmetrical frames 11 on the top of the base 1 achieve elastic locking through a double structure. One end of the spring 13 on the inner wall of the frame 11 fixes the frame 11, and the other end connects to the fixing plate 14. The spring 13 continuously provides elastic force, causing the fixing plate 14 to maintain a return tendency around the rotating shaft 12, which drives the locking block 15 on the outer wall of the fixing plate 14 to slide against the inner wall of the cover 2. This not only accommodates slight displacement during assembly and turning, but also stably locks the cover 2 and the base 1, enhancing the sealing effect. The oil injection hole 9 on the outer wall of the connector housing 8 can be injected with lubricating grease to ensure smooth rotation of the ball 6. After oil injection, the rubber plug 7 in the hole slides back to its original position, which can tightly seal the oil injection hole 9, preventing grease leakage and impurities from entering, further ensuring the long-term reliable operation of the structure.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for the ball joint of an automotive steering tie rod, comprising a base (1) and a cover (2), characterized in that: The base (1) is fixedly connected to a pad (5) at the top, and a connector housing (8) is fixedly connected to the top of the pad (5). A ball (6) rotates at the bottom of the connector housing (8). An input shaft body (10) is fixedly connected to the top of the ball (6). A limit ring (3) is fixedly connected to the top of the cover (2). Sealing glue (4) is installed on the inner wall of the limit ring (3). The base (1) abuts against the cover (2). Two frames (11) are fixedly connected to the top of the base (1). A rotating shaft (12) is rotatably connected to the inner wall of the frame (11). A spring (13) is fixedly connected to the inner wall of the frame (11). A fixing plate (14) is fixedly connected to the outer wall of the rotating shaft (12). A locking block (15) is fixedly connected to the outer wall of the fixing plate (14).

2. The automotive steering tie rod ball joint sealing structure according to claim 1, characterized in that: The sealant (4) is made of fluororubber.

3. The automotive steering tie rod ball joint sealing structure according to claim 1, characterized in that: The outer wall of the sphere (6) is rotatably connected to the inner wall of the pad (5).

4. The automotive steering tie rod ball joint sealing structure according to claim 1, characterized in that: The outer wall of the connector housing (8) is provided with an oil injection hole (9), and a rubber plug (7) is slidably connected to the inner wall of the oil injection hole (9).

5. The automotive steering tie rod ball joint sealing structure according to claim 2, characterized in that: The end of the spring (13) away from the frame (11) is fixedly connected to a fixing plate (14).

6. The automotive steering tie rod ball joint sealing structure according to claim 2, characterized in that: The card block (15) is slidably connected to the inner wall of the cover (2).

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