Bushing type ball stud

Abstract

The utility model provides a sleeve shaft formula ball head pull rod belongs to the field of automobile suspension. This sleeve shaft formula ball head pull rod, including the shell, ball seat, cover, ball pin and connecting shaft, connecting shaft includes inner shaft and outer shaft, outer shaft includes hollow axle body and the annular ferrule at the both ends of axle body, annular ferrule and axle body are integral, annular ferrule is covered on the outer wall of shell and is welded fixed, inner shaft is inserted in axle body, annular ferrule has the through insertion hole, the both ends of inner shaft stretch into the shell and both ends end part stretches into insertion hole from the shell, inner shaft is welded fixed with shell. This sleeve shaft formula ball head pull rod increases the connecting strength of connecting shaft junction place greatly.

Description

Technical Field

[0001] This utility model belongs to the field of automotive suspension and relates to a sleeve-type ball joint tie rod. Background Technology

[0002] Ball joints are commonly used mechanical components in automotive suspension systems. In previous patent applications, the applicant has made many innovations to ball joints in different directions and angles. For example, the applicant's utility model patent application number 2024213718724, filed on June 14, 2024, describes an insert-type ball joint, including a housing, a ball seat, a cover, a ball pin, and a connecting shaft. The lower end of the housing extends downward to form an extension section. A through-hole is provided on one side of the extension section, and a hollow cover protrudes outward on the other side of the extension section. The connecting shaft has an insertion section. The inner end of the insertion section passes through the through-hole into the housing and into the cover. The connecting shaft is axially fixed and sealed relative to the housing. The bottom of the ball seat abuts against the insertion section to achieve a limiting position. The outer wall of the connecting shaft has a round connecting lug. The connecting lug is axially fixed to the extension section and covers the outer end of the through-hole. This solution, by setting an extension section on the connecting shaft, changes the stress on the ball head from a point stress to a segment stress, thus achieving stress distribution and greatly reducing breakage and deformation at the connection.

[0003] The above solution is an improvement on the connection method between the connecting shaft and the ball head in the ball joint tie rod. It enhances the connection strength at the connection of the connecting shaft to a certain extent, but there are still many problems. For example, although the above solution changes the force at the connection from point force to segment force, the connecting shaft located inside the shell only plays a connecting role. The increase in connection strength at the beginning and end is limited. When the connection breaks, the overall connection structure immediately disintegrates. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a sleeve-type ball joint tie rod. This sleeve-type ball joint tie rod significantly increases the connection strength at the connecting shaft joint, thus solving the problem of weak connection strength at the connecting shaft joint in current ball joint tie rods.

[0005] The objective of this utility model can be achieved through the following technical solution: a sleeve-type ball joint tie rod, comprising a housing, a ball seat, a cover, a ball pin, and a connecting shaft, characterized in that the connecting shaft comprises an inner shaft and an outer shaft, the outer shaft comprising a hollow shaft body and an annular collar located at both ends of the shaft body, the annular collar and the shaft body being integrally formed, the annular collar being fitted onto the outer wall of the housing and welded and fixed, the inner shaft being inserted into the shaft body, the annular collar having a through insertion hole, both ends of the inner shaft extending into the housing and both end ends extending from the housing into the insertion hole, the inner shaft being welded and fixed to the housing.

[0006] The housing of this ball joint rod is open at the top and bottom with a fixed cap at the bottom. The ball seat is located inside the housing, the bottom of the ball pin abuts against the ball seat, and the top of the ball pin extends from the top of the housing. Other specific structures and principles are not detailed here, as they have been described in detail in the applicant's previous patent applications. The connecting shaft in this case significantly increases the connection strength through a two-section welding design of the outer shaft and the inner shaft. Specifically, firstly, the outer shaft forms an annular collar, which is welded to the outer wall of the housing. Compared with the original near-circular welding area, the annular welding greatly increases the welding area, fundamentally increasing the connection strength between the connecting shaft and the housing. Secondly, the shaft body is designed to be hollow, with an inner shaft inserted inside. The two ends of the inner shaft extend and are inserted into the housing, further strengthening the connection between the connecting shaft and the housing. The inner shaft is also welded and fixed to the housing, providing a secondary safety measure. When the weld of the annular collar breaks, the connection between the inner shaft and the housing can still maintain the connection between the connecting shaft and the housing. The design of the insertion holes serves multiple purposes. First, it facilitates installation. During installation, the outer shaft is fixed first, and then the inner shaft is inserted through the insertion hole to the other end, making it easy to install the inner shaft. Second, it establishes a connection between the outer and inner shafts. When the annular collar detaches from the housing through welding, because both ends of the inner shaft are located within the insertion holes and the inner shaft is axially fixed through welding, the inner shaft and the annular collar can still be connected, providing a limiting function. Furthermore, the housing in this case only requires through holes; there is no need to process outwardly extending parts, making processing convenient and requiring no change to the overall shape of the housing.

[0007] In the aforementioned sleeve-type ball joint tie rod, the inner shaft end is welded and fixed to the annular collar within the insertion hole.

[0008] The inner shaft end is welded to the annular collar inside the insertion hole, which further increases the connection strength. At this time, the inner shaft is welded to both the housing and the outer shaft.

[0009] In the aforementioned sleeve-type ball joint tie rod, an end cap is plugged at the outer end of the insertion hole.

[0010] The end cap can block the outer end of the socket, making the appearance flat.

[0011] In the aforementioned sleeve-type ball joint tie rod, the inner ring of the annular collar matches the shape of the outer wall of the housing.

[0012] In this design, the inner wall of the annular collar matches the shape of the outer wall of the shell, thus forming a complete weld surface.

[0013] In the aforementioned sleeve-type ball joint tie rod, a constricted gap is formed at the connection point between the annular collar and the shaft.

[0014] In the first approach, to facilitate welding of the inner shaft to the housing, the inner diameter of the annular collar must be larger than the outer diameter of the housing to allow for a gap for welding. However, this increases the difficulty of welding the annular collar to the housing. In this second approach, the annular collar has a constricted gap, creating an operating space between the gap and the outer wall of the housing. This operating space allows a longer section of the inner shaft to be exposed, facilitating welding and simplifying the operation. In this case, the inner diameter of the annular collar is less critical; it only needs to match the outer diameter of the housing.

[0015] In the aforementioned sleeve-type ball joint tie rod, the annular collar and the housing have an upper welding surface and a lower welding surface distributed circumferentially along the outer wall of the housing.

[0016] The welding strength is enhanced by welding the upper and lower surfaces.

[0017] In the aforementioned sleeve-type ball joint tie rod, the cross-section of the annular collar is circular and its diameter is not less than the outer diameter of the shaft body.

[0018] The dimensions must be sized to ensure strength.

[0019] In the aforementioned sleeve-type ball joint tie rod, a pair of opposing through holes are provided on the ball seat, and the inner shaft passes through the through holes.

[0020] The perforation is to allow the inner shaft to pass through, and the bottom of the ball seat rests against the cover, providing strong stability.

[0021] In the aforementioned sleeve-type ball joint tie rod, the cover has a protruding abutment post, which abuts against the inner shaft.

[0022] The supporting column provides some support for the inner axis.

[0023] Compared with existing technologies, this set of shaft-type ball joint tie rods has the following advantages:

[0024] 1. This set of shaft-type ball joint tie rods features a unique two-section design with an outer shaft and an inner shaft. The inner and outer shafts work together to significantly increase the connection strength.

[0025] 2. In the second design of this set of shaft-type ball joint tie rods, the design of the gap facilitates the welding of the inner shaft and the housing, making operation easier and reducing the requirement for the inner diameter of the annular collar.

[0026] 3. The housing of this set of shaft-type ball joint tie rod only needs to be drilled with through holes, and there is no need to process outward extension parts. It is easy to process and does not require changing the overall shape of the housing. Attached Figure Description

[0027] Figure 1 This is a structural cross-sectional view of Embodiment 1.

[0028] Figure 2 This is a structural cross-sectional view of Embodiment 2.

[0029] Figure 3 This is a structural cross-sectional view of the connecting shaft in Embodiment 1.

[0030] Figure 4 This is a structural cross-sectional view of the connecting shaft in Embodiment 2.

[0031] Figure 5 yes Figure 1 Enlarged view of the structure of region A in the middle.

[0032] List of reference numerals

[0033] In the picture:

[0034] 1. Shell;

[0035] 2. Ball seat;

[0036] 2a. Perforation;

[0037] 3. Cover;

[0038] 3a. Supporting column;

[0039] 4. Connecting shaft;

[0040] 4a. Inner shaft;

[0041] 4b. Outer shaft;

[0042] 4b1, Shaft;

[0043] 4b2, Annular ring;

[0044] 4b2a, socket;

[0045] 5. End caps;

[0046] 6. Gap section;

[0047] 7. Top welding surface;

[0048] 8. Bottom welding surface. Detailed Implementation

[0049] Example 1

[0050] like Figure 1 , Figure 3 and Figure 5As shown, this set of axial ball joint tie rods includes a housing 1, a ball seat 2, a cover 3, a ball pin, and a connecting shaft 4. The connecting shaft 4 includes an inner shaft 4a and an outer shaft 4b. The outer shaft 4b includes a hollow shaft body 4b1 and an annular collar 4b2 located at both ends of the shaft body 4b1. The annular collar 4b2 and the shaft body 4b1 are integrated. The annular collar 4b2 is fitted onto the outer wall of the housing 1 and welded and fixed. The inner shaft 4a is inserted into the shaft body 4b1. The annular collar 4b2 has a through insertion hole 4b2a. Both ends of the inner shaft 4a extend into the housing 1 and the ends of both ends extend from the housing 1 into the insertion hole 4b2a. The inner shaft 4a is welded and fixed to the housing 1. The housing 1 of this ball joint rod is open at the top and bottom, with a fixed cap 3 at the lower end. The ball seat 2 is located inside the housing 1, the bottom of the ball pin abuts against the ball seat 2, and the top of the ball pin extends from the upper end of the housing 1. Other specific structures and principles are not described in detail, as they have been described in detail in the applicant's previous patent applications. The connecting shaft 4 in this case has a two-section welding design of outer shaft 4b and inner shaft 4a, which greatly increases the connection strength. Specifically, firstly, the outer shaft 4b forms an annular collar 4b2, which is welded to the outer wall of the housing 1. Compared with the original near-circular welding area, the annular welding greatly increases the welding area, fundamentally increasing the connection strength between the connecting shaft and the housing 1. Secondly, the shaft body 4b1 is designed to be hollow, with an inner shaft 4a inserted inside. The two ends of the inner shaft 4a extend and are inserted into the housing 1, further strengthening the connection between the connecting shaft 4 and the housing 1. The inner shaft 4a is also welded and fixed to the housing 1, providing secondary insurance. When the weld of the annular collar 4b2 breaks, the connection between the inner shaft 4a and the housing 1 can still maintain the connection between the connecting shaft 4 and the housing 1. The design of the insertion hole 4b2a serves multiple purposes. First, it facilitates installation. During installation, the outer shaft 4b is fixed first, and then the inner shaft 4a is inserted into the other insertion hole 4b2a through the insertion hole 4b2a, making it easy to install the inner shaft 4a. Second, it establishes a connection between the outer shaft 4b and the inner shaft 4a. When the annular collar 4b2 is detached from the housing 1 by welding, since both ends of the inner shaft 4a are located within the insertion hole 4b2a, and the inner shaft 4a is axially fixed by welding, the inner shaft 4a and the annular collar 4b2 can still be connected, providing a limiting function. Furthermore, in this case, the housing 1 only needs to have through holes; there is no need to process outwardly extending parts, making processing convenient and not requiring any change to the overall shape of the housing 1.

[0051] The end of the inner shaft 4a is welded and fixed to the annular collar 4b2 within the insertion hole 4b2a. Welding the end of the inner shaft 4a to the annular collar 4b2 within the insertion hole 4b2a further increases the connection strength. At this point, the inner shaft 4a is welded to both the housing 1 and the outer shaft 4b. An end cap 5 is plugged at the outer end of the insertion hole 4b2a. The end cap 5 can block the outer end of the insertion hole 4b2a, making the appearance smooth. The inner ring of the annular collar 4b2 matches the shape of the outer wall of the housing 1. In this design, the inner wall of the annular collar 4b2 matches the shape of the outer wall of the housing 1, forming a complete weld surface. The annular collar 4b2 and the housing 1 have an upper weld surface 7 and a lower weld surface 8 distributed circumferentially along the outer wall of the housing 1. The weld strength is enhanced by these two weld surfaces. The cross-section of the annular collar 4b2 is circular, and its diameter is not less than the outer diameter of the shaft 4b1. The dimensions are designed to ensure strength. The ball seat 2 has a pair of opposing through holes 2a, into which the inner shaft 4a passes. The through holes 2a allow the inner shaft 4a to pass through, and the bottom of the ball seat 2 rests against the cover 3, providing strong stability. The cover 3 has a protruding abutment post 3a that abuts against the inner shaft 4a. The abutment post 3a provides some support for the inner shaft 4a.

[0052] Example 2

[0053] like Figure 2 and Figure 4 As shown, this embodiment differs from Embodiment 1 in that a constricted gap 6 is formed at the connection point between the annular collar 4b2 and the shaft 4b1. In the first embodiment, to facilitate welding of the inner shaft 4a to the housing 1, the inner diameter of the annular collar 4b2 must be larger than the outer diameter of the housing 1 to allow for a gap for welding. However, this increases the difficulty of welding the annular collar 4b2 to the housing 1. In this embodiment, the annular collar 4b2 has a constricted gap 6, forming an operating space between the gap 6 and the outer wall of the housing 1. This operating space allows a longer section of the inner shaft 4a to be exposed, facilitating welding between the inner shaft 4a and the housing 1 and simplifying the operation. In this case, the requirement for the inner diameter of the annular collar 4b2 is not high; it is sufficient that the inner diameter of the annular collar 4b2 matches the outer diameter of the housing 1.

[0054] Details of the structure, specific component dimensions and principles not mentioned in this application are all common knowledge or can be derived by those skilled in the art through simple selection, and will not be elaborated upon.

[0055] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A sleeve-type ball joint tie rod, comprising a housing, a ball seat, a cover, a ball pin, and a connecting shaft, characterized in that, The connecting shaft includes an inner shaft and an outer shaft. The outer shaft includes a hollow shaft body and annular rings located at both ends of the shaft body. The annular rings and the shaft body are integral. The annular rings are fitted onto the outer wall of the housing and welded and fixed. The inner shaft is inserted into the shaft body. The annular rings have through holes. Both ends of the inner shaft extend into the housing and the ends of both ends extend from the housing into the through holes. The inner shaft is welded and fixed to the housing.

2. The sleeve-type ball joint tie rod according to claim 1, characterized in that, The inner shaft end is welded and fixed to the annular collar inside the insertion hole.

3. The sleeve-type ball joint tie rod according to claim 1, characterized in that, An end cap is plugged at the outer end of the socket.

4. The sleeve-type ball joint tie rod according to claim 2, characterized in that, The inner ring of the annular collar matches the shape of the outer wall of the housing.

5. The sleeve-type ball joint tie rod according to claim 2, characterized in that, A constricted gap is formed at the connection point between the annular collar and the shaft.

6. The sleeve-type ball joint tie rod according to claim 2, characterized in that, The annular collar and the housing have an upper welding surface and a lower welding surface distributed circumferentially along the outer wall of the housing.

7. The sleeve-type ball joint tie rod according to claim 2, characterized in that, The cross-section of the annular collar is circular and its diameter is not less than the outer diameter of the shaft.

8. The sleeve-type ball joint tie rod according to claim 2, characterized in that, The ball seat has a pair of opposite through holes, and the inner shaft passes through the through holes.

9. The sleeve-type ball joint tie rod according to claim 2, characterized in that, The cover has a protruding abutment post that abuts against the inner shaft.

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