Anti-loose outer ball head pull rod

Abstract

The utility model provides an anti-loose outer ball head pull rod, and belongs to the field of automobile suspension. The anti-loose outer ball head pull rod comprises a shell, a ball seat, a ball pin and a dust cover, the upper portion and the lower portion of the shell are open, the lower end of the shell is plugged through a sealing cover located at the bottom of the shell, the sealing cover is provided with an inner connecting opening penetrating through the upper end and the lower end of the sealing cover, the inner connecting opening is rotationally connected with a connecting piece, and the upper end of the connecting piece extends towards the interior of the shell. One end of the connecting shaft is rotationally connected to the connecting piece, and compared with the sealing cover and the connecting shaft, the connecting piece can rotate independently. The anti-loose outer ball head pull rod can reduce axial looseness, and the problem that the overall structure is prone to looseness due to the fact that the side shaft of an existing outer ball head pull rod is installed on the side edge is solved.

Description

Technical Field

[0001] The utility model belongs to the field of automobile suspension and relates to an anti-loosening outer ball head pull rod. Background Art

[0002] The steering gear realizes steering transmission through the cooperation and connection between the outer ball joint tie rod and the inner ball joint tie rod. The existing outer ball joint tie rod generally includes a shell, a ball seat, a ball pin, a cover and a dust cover, etc. The specific connection method is not repeated here.

[0003] A side shaft is connected to the shell, and the function of the side shaft is to connect with the inner ball head tie rod. The applicant has made many improvements to its main product, the ball head tie rod, but there is no improvement on the side shaft. In practice, the side shaft does have certain problems. As applied for by the present applicant on September 15, 2023, the utility model patent named automobile ball head tie rod records an automobile ball head tie rod, including a base and a vertically arranged ball head pin, the lower end of the ball head pin is a sphere, a mounting hole vertically penetrates the base, a ball seat is provided in the mounting hole, and a ball head cavity for accommodating the sphere is formed between the upper side of the ball seat and the inner wall of the mounting hole, the ball head pin is covered with a dust cover, the lower end of the dust cover is fixedly connected to the base, a cover body is provided under the base, a spring is provided in the cover body, and the two ends of the spring act on the bottom wall of the cover body and the bottom wall of the ball seat respectively, and an annular locating seat is formed on the outer wall of the upper end of the cover body, and the locating seat is coaxial with the cover body; an annular gasket is provided on the upper side of the locating seat, and the two end surfaces of the annular gasket are respectively pressed against the top wall of the locating seat and the base; the cover body is fixedly connected to the base by screws which pass through the locating seat and the annular gasket in sequence through the rod and are screwed into the base, and there are multiple screws and they are evenly distributed along the circumference of the cover body. An external thread column is formed on the outer wall of the base, and the axes of the external thread column and the ball pin are vertically arranged. It can be seen from the scheme that the outer wall of the base (shell) has an external thread column (side shaft). From the prior art, it can be seen that basically all the side shafts on the ball head tie rods are side-connected. The advantage of this method is that the processing is relatively simple, but its disadvantage is that when the vibration is transmitted from the inside to the outside, the vibration will be transmitted to the shell, the castle bolt and other parts. The vibration of the vehicle will also cause the vibration to be transmitted, thereby causing the castle bolt to rotate circumferentially. Although this situation can be reduced by the pin, the continuous force is also easy to cause loosening. 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 anti-loosening outer ball head pull rod. The anti-loosening outer ball head pull rod can reduce axial looseness and improve the current installation method of the side axis of the outer ball head pull rod, which causes the overall structure to be easily loosened at the side.

[0005] The purpose of the utility model can be achieved through the following technical solutions: an anti-loosening outer ball head pull rod, including a shell, a ball seat, a ball pin and a dust cover, the shell is open at the top and bottom and the lower end is sealed by a cover located at the bottom of the shell, and it is characterized in that the cover has an internal connecting port running through the upper and lower ends thereof, a connecting piece is rotatably connected to the internal connecting port, the upper end of the connecting piece extends toward the interior of the shell, and also includes a bent connecting shaft, one end of the connecting shaft is rotatably connected to the connecting piece, and compared with the cover and the connecting shaft, the connecting piece can rotate independently.

[0006] The coordination between the dust cover, ball pin, housing and ball seat in the ball head pull rod and the rotation principle of the ball pin are the same as those of the ball head pull rod in the prior art. The outer end of the ball pin is connected to the castle bolt and cooperates with the latch pin to achieve axial positioning. The installation method is roughly to insert the ball pin from the bottom of the housing, and then reset the ball seat and cover. The specific connection method is the prior art and will not be described in detail. The other end of the connecting shaft is connected to the inner ball head pull rod. The ball head tie rod is provided with a connector that can independently realize rotational connection through the design of the inner connection interface, and a rotational connection structure is added on the basis of the connector to realize rotational connection with the connecting shaft. The rotational structure between the connecting shaft and the connector is to realize independent rotation of the connecting shaft. The structural design is ingenious. This structure transfers the connection position between the connecting shaft and the shell from the side wall to the bottom of the shell. When the steering gear vibration or vehicle vibration is transmitted to this point, the vibration will not be directly converted into the axial movement force of the castle bolt, which will easily cause the castle bolt to loosen. Instead, the vibration force is converted into the rotation of the connector through two rotational connection structures, which can offset most of the vibration. In the end, only a very small amount of vibration force is converted into axial movement, thereby reducing the axial displacement of the castle bolt and the pressure of the pin structure. Specifically, the connector is an independently rotatable structure. When the vibration is transmitted, since both ends of the connecting shaft are fixed (after being fixed with the inner ball head tie rod, the rotational connection end is also fixed as a whole), most of the vibration is directly transmitted to the connector, so that the connector forms a circumferential rotation alone to achieve stress offset.

[0007] In the above-mentioned anti-loosening external ball head pull rod, the connecting part includes a cylindrical body and a connecting part located at the bottom of the body, the connecting part extends radially, the outer wall of the connecting part has an annular groove, and the inner connecting port has a protruding annular ring, which is inserted into the annular groove.

[0008] The annular embedding groove on the connecting part cooperates with the annular embedding ring of the inner connecting port to realize the rotational connection of the connecting piece.

[0009] In the above-mentioned anti-loosening outer ball head pull rod, the inner end of the body passes through the inner connecting port and extends to the inside of the shell.

[0010] This structure increases the thickness of the body, provides space for the rotating connection structure and ensures the connection strength.

[0011] In the above-mentioned anti-loosening outer ball head pull rod, the inner end of the inner connecting port forms an annular retaining edge, and the position of the connecting portion is limited by the annular retaining edge.

[0012] The function of the annular retaining edge is positioning, and the positioning is achieved according to the annular retaining edge when installing the connecting piece.

[0013] In the above-mentioned anti-loosening external ball head pull rod, a universal rotating structure is provided between the connecting shaft and the connecting member, and the universal rotating structure includes a universal ball and a blocking cover. A spherical built-in groove is provided on the outer end surface of the connecting member, the universal ball is spherical and a partial area is placed in the built-in groove, the blocking cover has openings at both ends and one end is fixed to the connecting member, the universal ball has a connecting portion extending from the opening at the other end of the blocking cover, and one end of the connecting shaft is fixed to the connecting portion.

[0014] The rotating structure between the connecting shaft and the connecting piece is a universal rotating structure. The universal adjustment of the connecting shaft is achieved through a universal ball and a blocking cover. It is suitable for the installation of connecting shafts at different angles and does not affect the vibration transmission position. The structural design is ingenious.

[0015] In the above-mentioned anti-loosening outer ball head pull rod, an annular matching groove is provided on the connecting portion, and an annular matching portion is provided on the blocking cover, and the annular matching portion is matched in the annular matching groove.

[0016] The annular matching groove and the annular matching portion can be connected by tight fitting or welding.

[0017] In the above-mentioned anti-loosening outer ball head pull rod, the end of the connecting shaft connected to the adapter portion is in a flared shape, and the flaring direction is from the connection point to the outside.

[0018] The flared structure connects universal balls and connecting shafts of different sizes.

[0019] In the above-mentioned anti-loosening outer ball head pull rod, the connecting piece is made of stainless steel material.

[0020] In the above-mentioned anti-loosening outer ball head pull rod, the ball seat and the cover are an integrated structure.

[0021] The integrated solid ball seat and cover are easy to install.

[0022] Compared with the existing technology, the anti-loosening outer ball head pull rod has the following advantages:

[0023] 1. The anti-loosening outer ball head pull rod can offset most of the vibrations through the design of independently rotatable connectors. Ultimately, only a very small amount of vibration force is converted into axial movement, thereby reducing the axial displacement of the castle bolt, reducing the pressure on the pin structure, and ultimately playing an anti-loosening role.

[0024] 2. The universal rotating structure of the connecting shaft in the anti-loosening outer ball head pull rod forms an independently rotating connecting piece structure and is suitable for the installation of connecting shafts at various angles.

[0025] 3. The anti-loosening outer ball head pull rod transfers the connection position between the connecting shaft and the shell from the side wall to the bottom of the shell, making the vibration transmission and conversion more direct and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural sectional view of the anti-loosening outer ball head pull rod.

[0027] Figure 2 yes Figure 1 A magnified view of the structure in area A.

[0028] List of Reference Numerals

[0029] In the figure:

[0030] 1. Shell;

[0031] 2. Tee;

[0032] 3. Ball pin;

[0033] 4. Dust cover;

[0034] 5. Capping;

[0035] 5a, internal connection interface;

[0036] 5a1, annular ring;

[0037] 5b, annular retaining edge;

[0038] 6. Connectors;

[0039] 6a. Ontology;

[0040] 6b, connecting part;

[0041] 6b1, annular groove;

[0042] 6b2, annular matching groove;

[0043] 6c, built-in slot;

[0044] 7. Connecting shaft;

[0045] 8. Universal ball;

[0046] 8a, transfer unit;

[0047] 9. Blocking cover;

[0048] 9a. Annular fitting portion. DETAILED DESCRIPTION

[0049] like Figure 1 and Figure 2 As shown, the anti-loosening outer ball head pull rod comprises a housing 1, a ball seat 2, a ball pin 3 and a dust cover 4. The housing 1 is open at the top and bottom and the lower end is blocked by a cover 5 located at the bottom of the housing 1. The cover 5 has an internal connection port 5a that runs through the upper and lower ends thereof. The internal connection port 5a is rotatably connected to a connector 6. The upper end of the connector 6 extends into the interior of the housing 1. The cover 5 also comprises a bent connecting shaft 7. One end of the connecting shaft 7 is rotatably connected to the connector 6. Compared with the cover 5 and the connecting shaft 7, the connector 6 can rotate independently. The coordination between the dust cover 4, the ball pin 3, the housing 1 and the ball seat 2 and the rotation principle of the ball pin 3 in the ball head pull rod are the same as those of the ball head pull rod in the prior art. The outer end of the ball pin 3 is connected to a castle bolt and cooperates with a latch to achieve axial positioning. The installation method is roughly to extend the ball pin 3 from the bottom of the housing 1, and then reset the ball seat 2 and the cover 5. The specific connection method is the prior art and will not be described in detail. The other end of the connecting shaft 7 is connected to the inner ball head pull rod. The ball head pull rod is provided with a connector 6 capable of independently realizing rotational connection through the design of the inner connection port 5a, and a rotational connection structure is further provided on the basis of the connector 6 to realize rotational connection with the connecting shaft 7. The rotational structure between the connecting shaft 7 and the connector 6 is to realize independent rotation of the connecting shaft 7. The structural design is ingenious. This structure transfers the connection position of the connecting shaft 7 and the housing 1 from the side wall to the bottom of the housing 1. When the steering gear vibration or vehicle vibration is transmitted to this point, the vibration will not be directly converted into the axial movement force of the castle bolt, which will easily cause the castle bolt to loosen. Instead, the vibration force is converted into the rotation of the connector 6 through the two rotational connection structures, which can offset most of the vibration. In the end, only a very small amount of vibration force is converted into axial movement, thereby reducing the axial displacement of the castle bolt and the pressure of the pin structure. Specifically, the connector 6 is an independently rotatable structure. When the vibration is transmitted, since both ends of the connecting shaft 7 are fixed (after being fixed with the inner ball head pull rod, the rotational connection end is also fixed as a whole), most of the vibration is directly transmitted to the connector 6, so that the connector 6 forms a circumferential rotation alone to achieve stress offset.

[0050] The connecting member 6 includes a cylindrical body 6a and a connecting portion 6b located at the bottom of the body 6a. The connecting portion 6b extends radially, and the outer wall of the connecting portion 6b has an annular groove 6b1. The inner connection port 5a has a protruding annular ring 5a1, and the annular ring 5a1 is inserted into the annular groove 6b1. The annular groove 6b1 on the connecting portion 6b cooperates with the annular ring 5a1 of the inner connection port 5a to realize the rotation connection of the connecting member 6. The inner end of the body 6a extends from the inner connection port 5a to the inside of the housing 1. This structure increases the thickness of the body 6a, provides space for the rotation connection structure and ensures the connection strength. The inner end of the inner connection port 5a forms an annular retaining edge 5b, and the position of the connecting portion 6b is limited by the annular retaining edge 5b. The function of the annular retaining edge 5b is positioning, and positioning is achieved according to the annular retaining edge 5b when installing the connecting member 6. There is a universal rotation structure between the connecting shaft 7 and the connecting member 6, and the universal rotation structure includes a universal ball 8 and a blocking cover 9. A spherical built-in groove 6c is provided on the outer end surface of the connecting member 6. The universal ball 8 is spherical and a part of its area is placed in the built-in groove 6c. Both ends of the blocking cover 9 are open and one end is fixed to the connecting member 6. The universal ball 8 has a connecting portion 8a extending from the opening at the other end of the blocking cover 9, and one end of the connecting shaft 7 is fixed to the connecting portion 8a.

[0051] The rotating structure between the connecting shaft 7 and the connecting member 6 is a universal rotating structure. The universal adjustment of the connecting shaft 7 is realized by the universal ball 8 and the plug cover 9. It is suitable for the installation of the connecting shaft 7 at different angles, does not affect the vibration transmission position, and has an ingenious structural design. An annular matching groove 6b2 is provided on the connecting portion 6b, and an annular matching portion 9a is provided on the plug cover 9. The annular matching portion 9a is matched in the annular matching groove 6b2. The annular matching groove 6b2 and the annular matching portion 9a can be connected by tight fit or welding. One end of the connecting shaft 7 connected to the adapter 8a is flared, and the flaring direction is flared outward from the connection. The flaring structure connects the universal ball 8 and the connecting shaft 7 of different sizes. The connecting member 6 is made of stainless steel. The ball seat 2 and the cover 5 are an integrated structure. The integrated structure of the real ball seat 2 and the cover 5 is easy to install.

[0052] 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.

[0053] 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. An anti-loosening outer ball head pull rod, comprising a housing, a ball seat, a ball pin and a dust cover, wherein the housing is open at the top and bottom and the lower end is sealed by a cover at the bottom of the housing, characterized in that: The cover has an internal connection port that passes through the upper and lower ends thereof, and a connecting piece is rotatably connected to the internal connection port. The upper end of the connecting piece extends toward the interior of the shell, and also includes a bent connecting shaft, one end of which is rotatably connected to the connecting piece. Compared with the cover and the connecting shaft, the connecting piece can rotate independently.

2. The anti-loosening outer ball head tie rod according to claim 1, characterized in that: The connecting piece comprises a cylindrical body and a connecting portion located at the bottom of the body, the connecting portion extends radially, the outer wall of the connecting portion has an annular embedding groove, the inner connecting port has a protruding annular embedding ring, and the annular embedding ring is stuck in the annular embedding groove.

3. The anti-loosening outer ball head tie rod according to claim 2, characterized in that: The inner end of the body extends from the inner connection port to the inside of the shell.

4. The anti-loosening outer ball head tie rod according to claim 2, characterized in that: The inner end of the inner connection port forms an annular retaining edge, and the position of the connection portion is limited by the annular retaining edge.

5. The anti-loosening outer ball head tie rod according to claim 2, characterized in that: A universal rotating structure is provided between the connecting shaft and the connecting member, and the universal rotating structure includes a universal ball and a plug cover. A spherical built-in groove is provided on the outer end surface of the connecting member, the universal ball is spherical and a partial area is placed in the built-in groove, the plug cover has openings at both ends and one end is fixed to the connecting member, the universal ball has a connecting portion extending from the opening at the other end of the plug cover, and one end of the connecting shaft is fixed to the connecting portion.

6. The anti-loosening outer ball head tie rod according to claim 5, characterized in that: An annular matching groove is formed on the connecting portion, and an annular matching portion is formed on the blocking cover, and the annular matching portion is matched in the annular matching groove.

7. The anti-loosening outer ball head tie rod according to claim 5, characterized in that: One end of the connecting shaft connected to the adapter portion is in a flared shape, and the flaring direction is from the connection point to the outside.

8. The anti-loosening outer ball head tie rod according to claim 1, characterized in that: The connecting piece is made of stainless steel.

9. The anti-loosening outer ball head tie rod according to claim 1, characterized in that: The ball seat and the cover are an integrated structure.

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