Shaft connection structure applied to ball head pull rod

Abstract

The utility model provides a shaft connecting structure applied to a ball head pull rod, and belongs to the field of automobile suspension. The shaft connecting structure applied to the ball head pull rod comprises a shell, a sealing cover, a ball seat and a connecting shaft, the upper end and the lower end of the shell are open, the sealing cover blocks the lower end of the shell, the connecting shaft comprises a body, at least one end of the body comprises a bent first connecting section and a bent second connecting section, and the inner end of the first connecting section is connected with one end of the body; the outer end of the first connecting section is connected with the inner end of the second connecting section, the length of the first connecting section is larger than the width of the first connecting section, the outer wall of the first connecting section in the length direction is welded to the outer wall of the shell, the outer end of the second connecting section is fixedly connected to the sealing cover, the sealing cover is of a detachable structure, and when the welding position of the first connecting section and the shell is disconnected, the connecting shaft can be taken down. According to the shaft connecting structure applied to the ball head pull rod, the connecting strength of the connecting shaft and the shell is improved.

Description

Technical Field

[0001] The utility model belongs to the field of automobile suspension and relates to a shaft connection structure applied to a ball head pull rod. Background Art

[0002] The ball tie rod is an important component of the automobile suspension system. The specific connection structure will not be described in detail here, as the applicant has already elaborated on it in previous application documents.

[0003] From the perspective of the overall connection, the ball head tie rod includes a shell assembly (including a shell, a ball pin, a ball seat, a cover, etc.) and a connecting shaft. The most common connection method between the connecting shaft and the shell assembly is welding, but the current spot welding has shortcomings in strength. For example, the utility model patent with application number 2021229869453, entitled "A Automobile Balance Bar with Buffering Function", records a automobile balance bar with a buffering function, including a rod body, both ends of which are equipped with connecting components, so as to keep the car body stable and reduce roll when the car makes a sharp turn or avoids at high speed; it also includes a sleeve, which is fixed on the outer side of the middle part of the rod body, and a fixing seat is installed on the outer side of the sleeve; a cavity, which is opened inside the fixing seat, and a spherical ball is fitted inside the cavity, and a bent rod is installed on one end of the spherical ball; a second reinforcing plate, which is sleeved and installed on the outer side of the rod body, and the side of the second reinforcing plate is connected and fixed to one end of the bent rod. It can be seen from the drawings in the specification that the shaft (connecting shaft) and the connecting component (shell) are also connected by welding. This spot welding method is simple and convenient, but among the common problems of ball head connecting rods, the probability of breakage here is not small. In view of the above problems, the applicant has made improvements. Summary of the invention

[0004] The purpose of the utility model is to address the above-mentioned problems existing in the prior art and to provide an axis connection structure applied to a ball head tie rod. The axis connection structure applied to the ball head tie rod improves the connection strength between the connecting shaft and the housing, and solves the problem that the current axis connection structure is only a simple spot welding and has a weak strength.

[0005] The purpose of the utility model can be achieved through the following technical solutions: an axis connection structure applied to a ball head pull rod, comprising a shell, a cover, a ball seat and a connecting shaft, the upper and lower ends of the shell are both openings, the cover blocks the lower end of the shell, and is characterized in that the connecting shaft comprises a main body, at least one end of the main body comprises a bent first connecting section and a second connecting section, the inner end of the first connecting section is connected to one end of the main body, the outer end of the first connecting section is connected to the inner end of the second connecting section, the length of the first connecting section is greater than the width, the outer wall of the first connecting section in the length direction is welded to the outer wall of the shell, the outer end of the second connecting section is fixedly connected to the cover, the cover is a detachable structure, and when the welding point between the first connecting section and the shell is disconnected, the connecting shaft can be removed.

[0006] This shaft connection structure can be applied to outer ball head tie rods, inner ball head tie rods, balance rods, etc. When applied to balance rods, both ends of the connecting shaft body have a first connection section and a second connection section. The spot welding in the traditional technology is to weld the upper end face of the connecting shaft body to the outer wall of the shell, with a small welding surface and weak strength. In this scheme, through the design of the first connection section, a side welding structure with the outer wall in the length direction as the welding surface is formed, and the end face welding with a small area is changed to the side wall welding with a large area, which greatly improves the connection strength of the connecting shaft. In addition, the connecting shaft also has a second connection section, which is a second insurance structure. When the first connection section is broken with the shell, in general, the surface welding strength of the first connection section and the shell is sufficient. When an accident occurs, such as an excessively strong external force causing the connection to break, it is only necessary to remove and replace the connecting shaft through the detachable structure of the cover. When it cannot be replaced temporarily, the second connection section is used to continue to connect the connecting shaft to the shell. It is suitable for emergency scenarios where the connecting shaft cannot be damaged temporarily. The shaft connection structure is cleverly designed with double insurance. The double insurance structure has primary and secondary safety features, taking full account of different occasions.

[0007] In the above-mentioned shaft connection structure applied to the ball head tie rod, the outer wall of the first connecting section in the length direction has an inner arc surface, and the inner arc surface is welded to the outer wall of the shell.

[0008] The inner arc surface matches the outer arc surface of the outer wall of the shell, which is convenient for welding.

[0009] In the above-mentioned shaft connection structure applied to the ball head tie rod, the main body, the first connecting section and the second connecting section are in a Z shape as a whole.

[0010] That is, the main body forms a first connecting section downwards near the shell, and then extends toward the bottom of the shell to form a second connecting section.

[0011] In the above-mentioned shaft connection structure applied to the ball head tie rod, the main body, the first connecting section and the second connecting section are integrally formed.

[0012] The connecting shaft is bent as a whole and is not welded together, so it has sufficient strength.

[0013] In the above-mentioned shaft connection structure applied to the ball head tie rod, the cover includes a cover body embedded in the lower end of the shell, a sub-cover is screwed on the bottom of the cover body, and the outer end of the second connecting section is welded to the sub-cover.

[0014] The cover body has the same structure as the traditional cover. The split cover is designed to realize a detachable structure. When the first connecting section is broken, the connecting shaft can be removed by rotating the cover or the shell. When the first connecting section is connected to the shell, the circumferential movement of the split cover is restricted. In practice, the circumferential movement can be further locked with a latch structure.

[0015] In the above-mentioned shaft connection structure applied to the ball head tie rod, the sub-cover is disc-shaped and has a protruding matching column on the outer wall, and the outer end of the second connecting section has a matching groove, and the matching column is welded to the matching groove.

[0016] The matching column is inserted into the matching groove and then welded to connect the two.

[0017] In the above-mentioned shaft connection structure applied to the ball head tie rod, the bottom of the ball seat is welded to the cover body.

[0018] The lower end of the conventional ball seat is against the cover body. In practice, the rotation of the ball pin easily causes the ball seat and the cover body to collide frequently, thereby causing wear and tear to produce a gap. In this solution, the ball seat and the cover body are connected, so there will be no wear problem.

[0019] In the above-mentioned shaft connection structure applied to the ball head tie rod, the main body has a reinforcement part which is narrowed from the center to both ends.

[0020] In the ball head tie rod, in addition to the connection between the connecting shaft and the shell, which is easy to break, the central area of ​​the connecting shaft is also a common breakage point. The reinforced part has achieved thickness enhancement and improved strength.

[0021] Compared with the existing technology, the shaft connection structure applied to the ball head tie rod has the following advantages:

[0022] 1. The shaft connection structure used for the ball head tie rod adopts the side welding structure design, which changes from the end face welding with a small area to the side wall welding with a large area, greatly improving the connection strength of the connecting shaft.

[0023] 2. The shaft connection structure used for the ball head tie rod has double insurance. The double insurance structure has primary and secondary points, which fully considers different occasions.

[0024] 3. In the shaft connection structure of the ball head tie rod, the ball seat and the cover are connected to prevent the existence of a gap between the ball seat and the cover without affecting the installation of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural cross-sectional view of the shaft connection structure used for the ball head tie rod when it is applied to the balance rod.

[0026] Figure 2 yes Figure 1 A magnified view of the structure in area A.

[0027] Figure 3 It is a schematic cross-sectional view of the first connecting section in the shaft connection structure used for the ball head tie rod.

[0028] List of Reference Numerals

[0029] In the figure:

[0030] 1. Shell;

[0031] 2. Capping;

[0032] 2a, cover body;

[0033] 2b, separate cover;

[0034] 2b1, matching column;

[0035] 3. Connecting shaft;

[0036] 3a. Body;

[0037] 3a1, reinforcement part;

[0038] 3b, first connecting section;

[0039] 3b1, inner arc surface;

[0040] 3c, second connecting section;

[0041] 3c1, matching groove;

[0042] 4. Tee. DETAILED DESCRIPTION

[0043] like Figures 1 to 3As shown, the shaft connection structure used for the ball head tie rod comprises a housing 1, a cover 2, a ball seat 4 and a connecting shaft 3. Both the upper and lower ends of the housing 1 are open, and the cover 2 blocks the lower end of the housing 1. The connecting shaft 3 comprises a body 3a, and at least one end of the body 3a comprises a bent first connecting section 3b and a second connecting section 3c. The inner end of the first connecting section 3b is connected to one end of the body 3a, and the outer end of the first connecting section 3b is connected to the inner end of the second connecting section 3c. The length of the first connecting section 3b is greater than the width. The outer wall of the first connecting section 3b in the length direction is welded to the outer wall of the housing 1, and the outer end of the second connecting section 3c is fixedly connected to the cover 2. The cover 2 is a detachable structure. When the welding point between the first connecting section 3b and the housing 1 is disconnected, the connecting shaft 3 can be removed. The shaft connection structure can be applied to an outer ball head tie rod, an inner ball head tie rod, a balance rod, etc. When applied to a balance rod, both ends of the body 3a of the connecting shaft 3 have a first connecting section 3b and a second connecting section 3c. The spot welding in the traditional technology is to weld the upper end face of the connecting shaft 3 body 3a to the outer wall of the shell 1, with a small welding surface and weak strength. In this solution, the design of the first connecting section 3b forms a side welding structure with the outer wall in the length direction as the welding surface, changing from end face welding with a small area to side wall welding with a large area, greatly improving the connection strength of the connecting shaft 3. In addition, the connecting shaft 3 also has a second connecting section 3c, which is a second insurance structure. When the first connecting section 3b is broken from the shell 1, in general, the surface welding strength of the first connecting section 3b and the shell 1 is sufficient. When an accident occurs, such as excessive external force causing the connection to break, it is only necessary to remove and replace the connecting shaft 3 through the detachable structure of the cover 2. When it cannot be replaced temporarily, the second connecting section 3c is used to continue to connect the connecting shaft 3 to the shell 1, which is suitable for emergency scenarios where the connecting shaft 3 cannot be replaced temporarily. The shaft connection structure is cleverly designed and has double insurance. The double insurance structure has primary and secondary points, which fully considers different occasions.

[0044] The first connecting section 3b has an inner arc surface 3b1 on the outer wall in the length direction, and the inner arc surface 3b1 is welded to the outer wall of the shell 1. The inner arc surface 3b1 matches the outer arc surface of the outer wall of the shell 1, which is convenient for welding. The main body 3a, the first connecting section 3b and the second connecting section 3c are in a Z shape as a whole. That is, the main body 3a forms the first connecting section 3b downward near the shell 1, and then extends to the bottom of the shell 1 to form the second connecting section 3c. The main body 3a, the first connecting section 3b and the second connecting section 3c are integrally formed. The connecting shaft 3 is bent as a whole, not welded together, and has sufficient strength. The cover 2 includes a cover body 2a embedded in the lower end of the shell 1, and the bottom of the cover body 2a is screwed with a sub-cover 2b, and the outer end of the second connecting section 3c is welded to the sub-cover 2b. The cover body 2a has the same structure as the traditional cover 2, and the sub-cover 2b is to achieve a detachable structure. When the first connecting section 3b is broken, the cover 2 or the shell 1 can be rotated to remove the connecting shaft 3. When the first connecting section 3b is in a connected state with the housing 1, the circumferential movement of the sub-cover 2b is restricted. In practice, the circumferential movement can be further locked by the latch structure. The sub-cover 2b is disc-shaped and has a protruding matching column 2b1 on the outer wall. The outer end of the second connecting section 3c has a matching groove 3c1, and the matching column 2b1 is welded to the matching groove 3c1. The matching column 2b1 is inserted into the matching groove 3c1 and then welded to achieve the connection between the two. The bottom of the ball seat 4 is welded to the cover body 2a. The lower end of the traditional ball seat 4 is against the cover body 2a. In practice, the rotation of the ball pin easily causes the ball seat 4 and the cover body 2a to collide frequently, and then wear and tear to produce a gap. In this solution, the ball seat 4 is connected to the cover body 2a, so there is no wear problem. The main body 3a has a reinforcement part 3a1 that is constricted from the center to the two ends. In the ball head pull rod, in addition to the connection between the connecting shaft 3 and the housing 1, the central area of ​​the connecting shaft 3 is also a common easy-to-break place. The reinforcement part 3a1 realizes thickness enhancement and improves strength.

[0045] The detailed structures, specific component sizes and principles not mentioned in the present application documents are all common knowledge or can be obtained by those skilled in the art through simple selection, and will not be elaborated on.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A shaft connection structure applied to a ball head tie rod, comprising a housing, a cover, a ball seat and a connecting shaft, wherein both upper and lower ends of the housing are open, and the cover blocks the lower end of the housing, characterized in that: The connecting shaft includes a body, and at least one end of the body includes a bent first connecting section and a second connecting section, the inner end of the first connecting section is connected to one end of the body, the outer end of the first connecting section is connected to the inner end of the second connecting section, the length of the first connecting section is greater than the width, the outer wall of the first connecting section in the length direction is welded to the outer wall of the shell, the outer end of the second connecting section is fixedly connected to the cover, and the cover is a detachable structure. When the welding point between the first connecting section and the shell is disconnected, the connecting shaft can be removed.

2. The shaft connection structure applied to the ball head tie rod according to claim 1, characterized in that: The first connecting section has an inner arc surface on its outer wall in the length direction, and the inner arc surface is welded to the outer wall of the shell.

3. The shaft connection structure applied to the ball head tie rod according to claim 1, characterized in that: The main body, the first connecting section and the second connecting section are in a Z shape as a whole.

4. The shaft connection structure applied to the ball head tie rod according to claim 1, characterized in that: The main body, the first connecting section and the second connecting section are integrally formed.

5. The shaft connection structure applied to the ball head tie rod according to claim 1, characterized in that: The sealing cover comprises a cover body embedded in the lower end of the shell, a sub-cover is screwed on the bottom of the cover body, and the outer end of the second connecting section is welded to the sub-cover.

6. The shaft connection structure applied to the ball head tie rod according to claim 5, characterized in that: The sub-cover is disc-shaped and has a protruding matching column on the outer wall. The outer end of the second connecting section has a matching groove, and the matching column is welded to the matching groove.

7. The shaft connection structure applied to the ball head tie rod according to claim 5, characterized in that: The bottom of the ball seat is welded to the cover body.

8. The shaft connection structure applied to the ball head tie rod according to claim 1, characterized in that: The main body is provided with a reinforcement portion which is narrowed from the center to the two ends.

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