Steering drag link structure and vehicle steering assembly

Abstract

The invention discloses a steering straight pull rod structure and a vehicle steering assembly. The steering straight pull rod structure comprises a pull rod body, an elastic sealing cover, a ball head, a ball head arm and a supporting part. The pull rod body is provided with a ball head cavity with an opening in one side. The elastic sealing cover covers the opening of the ball head cavity and is connected to the pull rod body, a sealing cavity is defined by the elastic sealing cover and the pull rod body, and the elastic sealing cover is provided with an avoiding opening communicated with the sealing cavity. The ball head is rotationally arranged in the ball head cavity; the ball head arm is connected to the ball head; the supporting part is connected to the ball arm, located in the sealing cavity and provided with a supporting piece extending in the circumferential direction of the ball arm, and the supporting piece is used for pressing the portion, located in the receding opening, of the elastic sealing cover against the steering knuckle arm. According to the scheme, the probability that when the elastic sealing cover deforms, the elastic sealing cover and the steering knuckle arm are loosened or a gap appears is reduced, then the probability that impurities enter the ball head cavity through the receding opening is reduced, the sealing capacity of the ball head is improved, and the service life of the straight pull rod structure is prolonged.

Description

Technical Field

[0001] This invention relates to the field of vehicle steering structure technology, specifically to a steering tie rod structure and a vehicle steering assembly. Background Technology

[0002] A typical steering tie rod structure consists of a tie rod, a ball joint, and an elastic sealing cover. The ball head of the ball joint is rotatably mounted in the ball head cavity of the tie rod, and the ball head arm of the ball joint is used to connect to the steering knuckle arm. The ball head is sealed by the elastic sealing cover between the tie rod and the steering knuckle arm to prevent dust, mud, water and other impurities from entering between the ball head and the inner wall of the ball head cavity, which would cause abnormal wear between the ball head and the inner wall of the ball head cavity.

[0003] CN203832554U discloses an automotive tie rod, which has an oil inlet on a circular frame that can communicate with the ball cavity between the inner ball seat and the outer ball seat; an elastic sealing cover is provided at the through opening of the circular frame, the upper edge of the elastic sealing cover is fixedly connected to the outer wall of the circular frame, and the lower edge of the elastic sealing cover is fixedly connected to the connecting arm, so as to isolate and seal the ball pin.

[0004] However, because the ball joint arm of the ball joint moves relative to the tie rod body, the ball joint arm will cause the elastic seal to deform during the movement. This can easily cause the part of the elastic seal that is pressed against the steering knuckle arm to loosen and create a gap, increasing the probability of impurities entering the ball joint cavity. The sealing performance needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a steering tie rod structure and vehicle steering assembly. This invention solves the technical problem in the prior art where the ball joint arm of the ball joint moves relative to the tie rod body. During the movement of the ball joint arm, the elastic sealing cover deforms, which can easily cause the part of the elastic sealing cover that is pressed against the steering knuckle arm to loosen and create a gap between it and the steering knuckle arm. This increases the probability of impurities entering the ball joint cavity and requires improvement in sealing performance.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a steering tie rod structure, comprising: The tie rod body has a ball joint cavity with an opening on one side; An elastic sealing cover is provided over the opening of the ball head cavity and connected to the pull rod body, and together with the pull rod body, it encloses a sealing cavity and has a clearance opening communicating with the sealing cavity; The ball head is rotatably disposed in the ball head cavity; A ball joint arm, connected to the ball joint and extending out of the sealing cavity through the clearance opening, is used to connect to the steering knuckle arm; and A support portion, connected to the ball joint arm and located in the sealing cavity, has a support member extending circumferentially along the ball joint arm, the support member being used to press the portion of the elastic sealing cover located in the clearance opening against the steering knuckle arm.

[0007] In some embodiments, the support portion includes a support sleeve, which is circumferentially disposed around the outer periphery of the ball joint arm and blocked by the ball joint, and supports the inner wall of the elastic sealing cover, and presses the portion of the elastic sealing cover located at the clearance opening against the steering knuckle arm; The support sleeve, which supports one end of the inner wall of the elastic sealing cover, constitutes the support member.

[0008] In some embodiments, the sidewall of the resilient sealing cover is at least partially inclined toward the ball joint arm from one end near the pull rod body to one end near the clearance opening, and forms a pressing section; The support sleeve extends away from the ball head at one end and forms a flange in a direction away from the ball head arm. The flange extends circumferentially along the support sleeve and supports the inner wall of the pressing section.

[0009] In some embodiments, the support sleeve is provided to gradually expand in a direction away from the tie rod body.

[0010] In some embodiments, the end of the flange away from the ball joint abuts against the inner wall of the pressing section; The ball joint arm includes a connecting arm and a fixed arm connected to each other. The connecting arm is connected to the ball joint and its outer diameter is gradually widened in the direction away from the ball joint. The fixed arm extends out of the sealing cavity from the clearance opening and is used to connect the steering knuckle arm. The support sleeve has a sealing section formed in its axial direction, and the inner wall of the sealing section is in contact with the outer wall surface of the connecting arm.

[0011] In some embodiments, the elastic sealing cover is further provided with a straight section and a lip section at the end of the pressing section away from the tie rod body, the pressing section, the straight section and the lip section are connected in sequence, the straight section fits against the ball joint arm, the lip section gradually expands in a direction away from the straight section and is used to press against the steering knuckle arm, wherein the clearance opening is formed in the lip section.

[0012] In some embodiments, the inner wall of the straight segment is provided with a plurality of first sealing grooves spaced apart along the extending direction of the ball joint arm, each of the first sealing grooves extending circumferentially along the ball joint arm; and / or, The inner wall of the lip segment is provided with a plurality of second sealing grooves spaced radially thereon, and each second sealing groove extends circumferentially along the ball head arm.

[0013] In some embodiments, the steering tie rod structure further includes a first clamp, which is located outside the straight segment and clamps the straight segment to the ball joint arm.

[0014] In some embodiments, the pull rod body is provided with a connecting lip at the end edge of the opening, and the connecting lip extends circumferentially along the opening; The elastic sealing cover is fitted onto the outside of the connecting lip, and the steering tie rod structure also includes a second clamp, which clamps the elastic sealing cover onto the connecting lip.

[0015] Furthermore, the present invention also provides a vehicle steering assembly comprising: The steering tie rod structure as described in any of the above; and The steering knuckle arm is connected to one end of the ball joint arm that extends out of the sealing cavity, and has a mounting groove on the side near the elastic sealing cover, the mounting groove being for the elastic sealing cover to be inserted at the part of the clearance opening.

[0016] Compared with the prior art, in the steering tie rod structure provided by this invention, the ball joint rotates synchronously with the ball joint arm when rotating relative to the tie rod body. Since the support part is connected to the ball joint arm, the support part moves synchronously. Thus, during the movement of the ball joint arm, the support member of the support part always presses the clearance portion of the elastic sealing cover against the steering knuckle arm. This ensures that even if the elastic sealing cover deforms, it remains tightly fitted to the steering knuckle arm in the circumferential region of the clearance portion. Therefore, when the ball joint arm moves and causes the elastic sealing cover to deform, the clearance portion of the elastic sealing cover is less likely to detach from the steering knuckle arm, reducing the probability of the elastic sealing cover loosening or gaps appearing between it and the steering knuckle arm during deformation. This further reduces the probability of impurities entering the ball joint cavity through the clearance portion, improving the sealing ability of the ball joint and extending the service life of the tie rod structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the vehicle steering assembly installed on the vehicle frame according to an embodiment of the present invention; Figure 2 yes Figure 1 A partial structural diagram of the vehicle steering assembly; Figure 3 yes Figure 2 A cross-sectional view of the vehicle steering assembly; Figure 4 yes Figure 3 A partial schematic diagram of the vehicle steering assembly; Figure 5 yes Figure 2 Schematic diagram of a flexible sealing cover; Figure 6 yes Figure 5Cross-sectional view of the flexible sealing cover; Figure 7 yes Figure 3 Schematic diagram of the central support section; Figure 8 yes Figure 2 A partial schematic diagram of the tie rod body; Figure 9 yes Figure 3 A schematic diagram of the ball head and ball head arm; Figure 10 yes Figure 2 A schematic diagram of the middle steering knuckle arm.

[0018] Explanation of reference numerals in the attached figures: 1. Tie rod body; 1a. Ball joint cavity; 11. Connecting lip; 2. Elastic sealing cover; 2a. Sealing cavity; 2b. Clearance opening; 21. Pressing section; 22. Straight section; 22a. First sealing groove; 23. Lip section; 23a. Second sealing groove; 3. Ball joint; 4. Ball joint arm; 41. Connecting arm; 42. Fixed arm; 5. Support part; 51. Support component; 52. Support sleeve; 521. Sealing section; 53. Flange; 6. First clamp; 7. Second clamp; 8. Steering knuckle arm; 8a. Mounting groove; 8b. Insertion hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problem that the ball joint arm of the ball joint moves relative to the tie rod body, causing deformation of the elastic sealing cover during movement, which can easily lead to the elastic sealing cover loosening and creating a gap between it and the steering knuckle arm, increasing the probability of impurities entering the ball joint cavity and requiring improved sealing performance, this invention provides a steering tie rod structure. When the ball joint arm moves and causes deformation of the elastic sealing cover, the clearance portion of the elastic sealing cover is less likely to detach from the steering knuckle arm, reducing the probability of the elastic sealing cover loosening or creating a gap with the steering knuckle arm during deformation. This, in turn, reduces the probability of impurities entering the ball joint cavity through the clearance portion, improves the sealing capability of the ball joint, and extends the service life of the tie rod structure.

[0021] It should be noted that the steering tie rod structure described in this invention is used in, but not limited to, vehicle steering assemblies. For ease of explanation, this invention only uses the application of the steering tie rod structure in vehicle steering assemblies as an example. The principle of applying the steering tie rod structure to other types of equipment is essentially the same as that applied to vehicle steering assemblies, and will not be elaborated here.

[0022] Please see Figures 1 to 4 , Figures 1 to 4 This is a schematic diagram of a steering tie rod structure according to an embodiment of the present invention. The steering tie rod structure includes a tie rod body 1, an elastic sealing cover 2, a ball joint 3, a ball joint arm 4, and a support portion 5. The tie rod body 1 has a ball joint cavity 1a with an opening on one side. The elastic sealing cover 2 covers the opening of the ball joint cavity 1a and is connected to the tie rod body 1, forming a sealed cavity 2a with the tie rod body 1, and has a clearance opening 2b communicating with the sealed cavity 2a. The ball joint 3 is rotatably disposed in the ball joint cavity 1a. The ball joint arm 4 is connected to the ball joint 3 and extends along the opening of the ball joint cavity 1a and the layout direction of the clearance opening 2b, and extends out of the sealed cavity 2a through the clearance opening 2b for connecting the steering knuckle arm 8. The support portion 5 is connected to the ball joint arm 4 and is located in the sealed cavity 2a, and has a support member 51 extending circumferentially along the ball joint arm 4. The support member 51 is used to press the portion of the elastic sealing cover 2 located at the clearance opening 2b against the steering knuckle arm 8.

[0023] In the steering tie rod structure provided by this invention, when the ball joint 3 rotates relative to the tie rod body 1, it drives the ball joint arm 4 to rotate synchronously. Since the support part 5 is connected to the ball joint arm 4, the support part 5 moves synchronously. Thus, during the movement of the ball joint arm 4, the support member 51 of the support part 5 always presses the clearance opening 2b of the elastic sealing cover 2 against the steering knuckle arm 8, so that even if the elastic sealing cover 2 deforms, it still tightly fits the steering knuckle arm 8 in the circumferential part of the clearance opening 2b. Therefore, when the movement of the ball joint arm 4 causes the elastic sealing cover 2 to deform, the clearance opening 2b of the elastic sealing cover 2 is not easy to detach from the steering knuckle arm 8, reducing the probability of the elastic sealing cover 2 becoming loose or gapped from the steering knuckle arm 8 when it deforms. This reduces the probability of impurities entering the ball joint cavity 1a through the clearance opening 2b, improves the sealing ability of the ball joint 3, and extends the service life of the tie rod structure.

[0024] It should be noted that, in one embodiment, the support part 5 is configured as a support arm and a support ring. The support ring constitutes a support member 51 and is fixedly connected to the ball joint arm 4 via the support arm. The support ring presses the clearance opening 2b of the elastic sealing cover 2 against the steering knuckle arm 8.

[0025] In another embodiment, the ball head 3 is integrally connected to the ball head arm 4, and the support part 5 is configured as a telescopic arm and a support ring. The fixed end of the telescopic arm is fixed to the ball head arm 4, and its telescopic end is connected to the support ring, thereby enabling flexible adjustment of the support ring's pressing force on the elastic sealing cover 2 at the clearance opening 2b. It should be noted that the telescopic arm can be a hydraulic rod, a cylinder, an electric actuator, or other forms.

[0026] In another embodiment, the support part 5 includes a support sleeve 52, which is arranged around the outer periphery of the ball joint arm 4 and blocked by the ball joint 3. It also supports the inner wall of the elastic sealing cover 2 and presses the part of the elastic sealing cover 2 located at the clearance opening 2b against the steering knuckle arm 8. The end of the support sleeve 52 that supports the inner wall of the elastic sealing cover 2 constitutes a support member 51.

[0027] In this embodiment, the support sleeve 52 is directly sleeved on the ball joint arm 4, and the ball joint 3 blocks the support sleeve 52, so that the end of the support sleeve 52 away from the ball joint 3 can stably press the clearance opening 2b of the elastic sealing cover 2 against the steering knuckle arm 8. The structure is simple and reliable, saves costs, and is also easy to assemble.

[0028] In one embodiment, please refer to Figures 5 to 7 The sidewall of the elastic sealing cover 2 is inclined at least partially toward the ball joint arm 4 from one end near the pull rod body 1 to the end near the clearance opening 2b, and forms a pressing section 21; the support sleeve 52 extends away from the ball joint 3 in a direction away from the ball joint arm 4 and forms a flange 53, which extends circumferentially along the support sleeve 52 and supports the inner wall of the pressing section 21.

[0029] In this embodiment, the elastic sealing cover 2 is gradually reduced in the direction close to the steering knuckle arm 8 to form a pressing section 21, and the flange 53 on the support sleeve 52 presses against the pressing section 21, thereby expanding the range of the support part 5 pressing against the elastic sealing cover 2 and further improving the connection stability between the elastic sealing cover 2 and the steering knuckle arm 8.

[0030] In one embodiment, the support sleeve 52 is gradually widened in a direction away from the tie rod body 1.

[0031] In this embodiment, the support sleeve 52 is arranged to gradually expand near the relief opening 2b, thereby further expanding the range in which the support part 5 can press against the elastic sealing cover 2, thus improving the sealing ability.

[0032] In one embodiment, the end of the flange 53 away from the ball joint arm 4 abuts against the inner wall of the pressing section 21; the ball joint arm 4 includes a connecting arm 41 and a fixing arm 42 connected to each other. The connecting arm 41 is connected to the ball joint 3 and its outer diameter is gradually widened in the direction away from the ball joint 3. The fixing arm 42 extends out of the sealing cavity 2a from the clearance port 2b and is used to connect the steering knuckle arm 8. The support sleeve 52 has a sealing section 521 formed in its axial direction. The inner wall of the sealing section 521 is attached to the outer wall surface of the connecting arm 41.

[0033] In this embodiment, the flange 53 presses against the inner wall of the elastic sealing cover 2, and at the same time the support sleeve 52 is attached to the outer wall of the connecting arm 41, thereby separating the upper space and lower space of the support sleeve 52, thus blocking the passage of external impurities into the ball head cavity 1a, and further improving the sealing ability.

[0034] In one embodiment, the elastic sealing cover 2 is provided with a straight section 22 and a lip section 23 in sequence at the end of the pressing section 21 away from the tie rod body 1. The pressing section 21, the straight section 22 and the lip section 23 are connected in sequence. The straight section 22 fits against the ball joint arm 4. The lip section 23 gradually expands in the direction away from the straight section 22 and is used to press against the steering knuckle arm 8. The clearance opening 2b is formed in the lip section 23.

[0035] In this embodiment, the lip section 23 increases the contact sealing area between the elastic sealing cover 2 and the steering knuckle arm 8, while the straight section 22, which fits against the ball joint arm 4, further prevents external impurities from entering the sealing cavity 2a, thus improving the sealing capability. It should be noted that in this design, the elastic sealing cover 2 is made of rubber. Furthermore, the support sleeve 52 is made of polyurethane rubber, and its strength is greater than that of the elastic sealing cover 2; the strength can be adjusted by modifying the formula.

[0036] In one embodiment, the inner wall of the straight segment 22 is provided with a plurality of first sealing grooves 22a at intervals along the extension direction of the ball head arm 4, and each first sealing groove 22a extends circumferentially along the ball head arm 4; the inner wall of the lip segment 23 is provided with a plurality of second sealing grooves 23a at intervals along its radial direction, and each second sealing groove 23a extends circumferentially along the ball head arm 4.

[0037] In this embodiment, the multiple first sealing grooves 22a of the straight segment 22 constitute an axial sealing groove at the clearance opening 2b, while the second sealing grooves 23a of the lip segment 23 constitute a radial sealing groove at the clearance opening 2b, thereby further improving the sealing performance through the axial and radial sealing grooves. Specifically, the sealing grooves are made of an elastic matrix, such as rubber or elastic plastic, so that when external pressure or movement occurs, the sealing grooves will elastically deform and tightly fit the contact surface, forming an initial sealing barrier. This elastic deformation capability allows the sealing grooves to adapt to dimensional changes under different working conditions, maintaining the sealing effect. Multiple sealing grooves form multiple sealing barriers, further enhancing protection. It should be noted that in this solution, the first sealing grooves 22a and the second sealing grooves 23a are each provided with five grooves.

[0038] In one embodiment, the steering tie rod structure further includes a first clamp 6, which is located outside the straight segment 22 and clamps the straight segment 22 to the ball joint arm 4.

[0039] In this embodiment, the straight section 22 of the elastic sealing cover 2 is fastened to the ball joint arm 4 by the first clamp 6. On the one hand, this allows the straight section 22 of the elastic sealing cover 2 to move synchronously with the ball joint arm 4, thereby preventing the lip section 23 from disengaging from the steering knuckle arm 8. On the other hand, it eliminates the gap between the inner wall of the straight section 22 and the ball joint arm 4.

[0040] In one embodiment, please refer to Figure 4and Figure 8 The tie rod body 1 has a connecting lip 11 at the end edge of the opening, and the connecting lip 11 extends circumferentially along the opening; the elastic sealing cover 2 is sleeved on the outside of the connecting lip 11, and the steering tie rod structure also includes a second clamp 7, which clamps the elastic sealing cover 2 onto the connecting lip 11.

[0041] In this embodiment, the elastic sealing cover 2 is fastened to the connecting lip 11 of the pull rod body 1 by the second clamp 7. Specifically, in this solution, the connecting lip 11 is gradually widened in the direction away from the ball head cavity 1a, and cooperates with the second clamp 7 to prevent the elastic sealing cover 2 from falling off, while improving the sealing ability.

[0042] Furthermore, the present invention also provides a vehicle steering assembly, which includes a steering tie rod structure as described in any of the above claims and a steering knuckle arm 8. The steering knuckle arm 8 is connected to one end of the ball joint arm 4 extending out of the sealing cavity 2a, and has a mounting groove 8a on the side near the elastic sealing cover 2. The mounting groove 8a allows the elastic sealing cover 2 to be inserted into the clearance opening 2b. It should be noted that the detailed structure of the steering tie rod structure of the vehicle steering assembly can be referred to the above-described embodiments of the steering tie rod structure, and will not be repeated here. Since the above-described steering tie rod structure is used in the vehicle steering assembly of the present invention, the embodiments of the vehicle steering assembly of the present invention include all the technical solutions of all embodiments of the above-described steering tie rod structure, and the achieved technical effects are also completely the same, and will not be repeated here.

[0043] In this embodiment, the lip section 23 of the elastic sealing cover 2 is inserted into the mounting groove 8a of the steering knuckle arm 8, so that the clearance opening 2b of the lip section 23 can be hidden in the mounting groove, further reducing the probability of external impurities entering the ball joint cavity 1a through the clearance opening 2b and improving the sealing performance.

[0044] It should be noted that you should refer to [link / reference]. Figure 2 , Figure 9 and Figure 10 The bottom wall of the mounting groove 8a of the steering knuckle arm 8 has an insertion hole 8b, which passes through the steering knuckle arm 8 and allows one end of the ball joint arm 4 extending out of the sealing cavity 2a to be inserted. The end of the ball joint arm 4 extending out of the sealing cavity 2a has external threads and a pin hole. The steering tie rod structure has a locking nut and a locking pin. The locking nut is screwed onto the end of the ball joint arm 4 extending out of the sealing cavity 2a to prevent the steering knuckle arm 8 from disengaging from the ball joint arm 4. The pin hole is located on the side of the locking nut away from the steering knuckle arm 8, and the locking pin is inserted into the pin hole.

[0045] Furthermore, the portion of the ball joint arm 4 extending out of the sealing cavity 2a is a fixed arm 42. The outer diameter of the portion of the fixed arm 42 that connects to the connecting arm 41 gradually widens in the direction close to the connecting arm 41 to restrict the movement of the steering knuckle arm 8 near the ball joint 3. The portion of the fixed arm 42 away from the connecting arm 41 is provided with external threads for a lock nut to be threaded into.

[0046] It should be noted that in this scheme, each end of the tie rod body 1 is provided with a ball joint cavity 1a. Each of the two ball joint cavities 1a is provided with a set of elastic sealing cover 2, ball joint 3, ball joint arm 4 and support part 5, and is connected to a steering knuckle arm 8.

[0047] In order to better understand the present invention, the following Figures 1 to 10 The technical solution of the present invention will be described in detail below: In this design, the support sleeve 52 is located between the sealing cover and the ball head 3, ensuring that the shape of the sealing cover remains unchanged at least during operation, maintaining the sealing effect. Specifically, when the lock nut is tightened, the support sleeve 52 tightly fits the lip section 23 of the sealing cover with the steering knuckle arm 8, ensuring that the lip section 23 of the sealing cover is tightly fitted and sealed with the steering knuckle arm 8 in the axial direction. Impurities cannot enter from this point, and the deformation of the sealing cover during operation can be recovered.

[0048] Furthermore, the steering knuckle arm 8 has a mounting groove 8a. After assembly, the lip section 23 of the sealing cover is embedded in the mounting groove 8a, adding an extra layer of protection against mud and water, ensuring a good seal during use. The upper and lower ends of the sealing cover are each fitted with clamps, the clamping force of which can be adjusted as needed to ensure radial sealing and a tight fit between the upper and lower ends of the sealing cover. The lip section 23 and the straight section 22 of the sealing cover each have five annular sealing grooves on their inner diameter sections, further enhancing axial and radial sealing.

[0049] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A steering tie rod structure, characterized in that, include: The tie rod body has a ball joint cavity with an opening on one side; An elastic sealing cover is provided over the opening of the ball head cavity and connected to the pull rod body, and together with the pull rod body, it encloses a sealing cavity and has a clearance opening communicating with the sealing cavity; The ball head is rotatably disposed in the ball head cavity; A ball joint arm, connected to the ball joint and extending out of the sealing cavity through the clearance opening, is used to connect to the steering knuckle arm; and A support portion, connected to the ball joint arm and located in the sealing cavity, has a support member extending circumferentially along the ball joint arm, the support member being used to press the portion of the elastic sealing cover located in the clearance opening against the steering knuckle arm.

2. The steering tie rod structure according to claim 1, characterized in that, The support includes a support sleeve, which is circumferentially disposed around the outer periphery of the ball joint arm and blocked by the ball joint, and supports the inner wall of the elastic sealing cover, and presses the portion of the elastic sealing cover located at the clearance opening against the steering knuckle arm; The support sleeve, which supports one end of the inner wall of the elastic sealing cover, constitutes the support member.

3. The steering tie rod structure according to claim 2, characterized in that, The sidewall of the elastic sealing cover is at least partially inclined toward the ball joint arm from one end near the pull rod body to one end near the clearance opening, and forms a pressing section; The support sleeve extends away from the ball head at one end and forms a flange in a direction away from the ball head arm. The flange extends circumferentially along the support sleeve and supports the inner wall of the pressing section.

4. The steering tie rod structure according to claim 3, characterized in that, The support sleeve is gradually widened in a direction away from the tie rod body.

5. The steering tie rod structure according to claim 4, characterized in that, The end of the flange away from the ball joint abuts against the inner wall of the pressing section; The ball joint arm includes a connecting arm and a fixed arm connected to each other. The connecting arm is connected to the ball joint and its outer diameter is gradually widened in the direction away from the ball joint. The fixed arm extends out of the sealing cavity from the clearance opening and is used to connect the steering knuckle arm. The support sleeve has a sealing section formed in its axial direction, and the inner wall of the sealing section is in contact with the outer wall surface of the connecting arm.

6. The steering tie rod structure according to claim 3, characterized in that, The elastic sealing cover is further provided with a straight section and a lip section at the end of the pressing section away from the tie rod body. The pressing section, the straight section and the lip section are connected in sequence. The straight section fits against the ball joint arm. The lip section gradually expands in the direction away from the straight section and is used to press against the steering knuckle arm. The clearance opening is formed in the lip section.

7. The steering tie rod structure according to claim 6, characterized in that, The inner wall of the straight segment is provided with a plurality of first sealing grooves spaced apart along the extending direction of the ball joint arm, and each first sealing groove extends circumferentially along the ball joint arm; and / or, The inner wall of the lip segment is provided with a plurality of second sealing grooves spaced radially thereon, and each second sealing groove extends circumferentially along the ball head arm.

8. The steering tie rod structure according to claim 6, characterized in that, The steering tie rod structure also includes a first clamp, which is located on the outside of the straight segment and clamps the straight segment to the ball joint arm.

9. The steering tie rod structure according to claim 1, characterized in that, The pull rod body is provided with a connecting lip at the end edge of the opening, and the connecting lip extends circumferentially along the opening; The elastic sealing cover is fitted onto the outside of the connecting lip, and the steering tie rod structure also includes a second clamp, which clamps the elastic sealing cover onto the connecting lip.

10. A vehicle steering assembly, characterized in that, include: The steering tie rod structure as described in any one of claims 1-9; and The steering knuckle arm is connected to one end of the ball joint arm that extends out of the sealing cavity, and has a mounting groove on the side near the elastic sealing cover, the mounting groove being for the elastic sealing cover to be inserted at the part of the clearance opening.

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