Penetration type ball head pull rod

Abstract

The utility model provides a penetrating type ball head pull rod, and belongs to the field of automobile suspension. The penetrating type ball head pull rod comprises a shell, a ball seat, a sealing cover, a ball pin and a connecting shaft, the lower end of the shell extends downwards to form an extending section, a penetrating opening is formed in one side of the extending section, a hollow cover sleeve protruding outwards is arranged on the other side of the extending section, a stretching-in section is arranged on the connecting shaft, the inner end of the stretching-in section penetrates into the shell from the penetrating opening and enters the cover sleeve, and the outer end of the stretching-in section penetrates into the shell from the sealing cover. Relative to the shell, the connecting shaft is axially fixed and connected in a sealed mode, the bottom of the ball seat abuts against the extending-in section to achieve limiting, a round-cover-shaped connecting lug is arranged on the outer wall of the connecting shaft, the connecting lug is axially fixed to the extending section, and the outer end of the penetrating opening is covered with the connecting lug. According to the penetrating type ball head pull rod, the strength of the connecting shaft is improved, and the shaft fracture and deformation conditions are reduced.

Description

Technical Field

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

[0002] The ball head tie rod is an important component of the automobile suspension system. The specific structural composition and related structural connection methods are not described in detail, which are all existing technologies. In the patent applied for by the applicant, a very detailed explanation of the ball head tie rod has been made.

[0003] In terms of the overall structure, the ball head tie rod includes a housing assembly and a connecting shaft. One end of the connecting shaft is connected to the housing, and the other end is connected to the housing of another ball head tie rod (such as a balance rod) or an inner ball head tie rod. For example, the application number is 2023216682749, the application date is 2023.6.28, and the name is a utility model patent for a high-stability balance rod assembly. The scheme includes a mounting block, a main body, a fixing screw and a limiting part. One end of the mounting block is provided with a mounting groove, and the main body is hinged to the inner wall of the mounting groove. The mounting The bottom of the groove is provided with an installation opening, the installation opening passes through the installation block, the fixing screw passes through the installation opening, the limiting part is fixedly connected to the outer wall of the installation block, the limiting part is provided with a limiting groove at one end away from the main body, the fixing screw is used for external parts to be set, the limiting groove is used to limit the external parts, the main body includes a rod body, a first column and a second column, the first column is hinged to the inner wall of the installation groove, one end of the rod body is fixedly connected to the end of the first column away from the bottom of the installation groove, and the other end of the rod body is fixedly connected to the outer wall of the second column. Combined with the drawings in the specification, it can be seen that the connection method between the rod body and the second column is welding, which is also the most common connection method for the connecting shaft (rod body) and the shell (second column) at present. This connection method has the basic advantages of welding and is widely used in the industry. However, since the ball head pull rod is a lossy part, the strength at the connection between the shell and the connecting shaft is relatively weak and the tensile stress here is large, and the probability of fracture and deformation is not small. Summary of the invention

[0004] The purpose of the utility model is to provide an interpenetrating ball head pull rod in view of the above-mentioned problems existing in the prior art. The interpenetrating ball head pull rod increases the strength of the connecting shaft, reduces the possibility of shaft breakage and deformation, and solves the problems of easy breakage and deformation at the connection between the connecting shaft and the shell in the current ball head pull rod.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a through-type ball head pull rod, comprising a shell, a ball seat, a cover, a ball pin and a connecting shaft, characterized in that the lower end of the shell extends downward to form an extension section, a through opening is provided on one side of the extension section, and a hollow cover sleeve protruding outward is provided on the other side of the extension section, and an insertion section is provided on the connecting shaft, and the inner end of the insertion section penetrates into the shell from the through opening and enters into the cover sleeve. Relative to the shell, the connecting shaft is axially fixed and sealed, the bottom of the ball seat abuts against the insertion section to achieve limiting, and a round cover-shaped connecting ear is provided on the outer wall of the connecting shaft, and the connecting ear is axially fixed to the extension section, and the connecting ear covers the outer end of the through opening.

[0006] The shell is open at the top and bottom and has a fixed cover at the lower end. The ball seat is located inside the shell, the bottom of the ball pin abuts against the ball seat, and the top of the ball pin extends from the upper end of the shell. The extension section realizes the extension of the shell and provides installation space for the connecting shaft. This solution is different from the traditional connecting shaft welding method and adopts an interlaced built-in method to achieve installation. Specifically, the insertion section in the connecting shaft extends into the shell from the through opening and enters the cover sleeve. The connecting shaft is axially fixed and relatively sealed with the shell to prevent loosening and dust from entering. The function of the cover sleeve is to realize the positioning of the inner end of the insertion section and extend the insertion length of the insertion section, thereby increasing the connection strength. For the ball seat, the traditional ball seat is fixed by abutting against the cover. In this case, the bottom of the ball seat is fixed by abutting against the insertion section. The ball on the ball pin is located in the ball seat, and the shaft of the ball pin extends from the upper end of the shell. By setting the extension section on the connecting shaft, the original point fixation (welding point) is transformed into a segment fixation. When the extension section enters the shell, the ball head is no longer stressed at the point, but at the segment, which achieves stress sharing and can greatly reduce the fracture and deformation of the connection. In addition, the connecting ear is in the area outside the extension section on the connecting shaft. After the extension section is fixed, the connecting ear is also fixed. The position is at the outer end of the through-hole. After the connecting ear is fixed, it covers the through-hole to achieve dustproof. Another function of the connecting ear is to enhance the strength of the connection. When the ball head connecting rod generates stress, the connecting ear is the first line of defense, and it resists the stress together with the extension section, which greatly enhances the connection strength of the connecting shaft. Even if the connection of the connecting ear is broken, the connection of the extension section can still support the connecting shaft. The design is ingenious.

[0007] In the above-mentioned through-type ball head pull rod, a matching groove is provided on the outer wall of the shell, and the connecting ear is threadedly connected to the matching groove.

[0008] When the connecting shaft is rotated, the connecting ear and the matching groove form a threaded connection.

[0009] In the above-mentioned through-type ball head pull rod, the cover sleeve is cylindrical.

[0010] The extending section is cylindrical, and its shape matches that of the cover sleeve.

[0011] In the above-mentioned through-type ball head tie rod, the through-opening has an internal thread, and the connecting shaft has a matching external thread.

[0012] In this solution, the connecting shaft is connected to the shell at the through-opening, and this connection point is at the same position as the connection point of the connecting ear, and the connecting force of the area formed here is stronger.

[0013] In the above-mentioned through-type ball head tie rod, the outer diameter of the inner end of the extending section matches the inner diameter of the cover sleeve.

[0014] In the above-mentioned inserted ball head pull rod, the inner end of the insertion section is threadedly connected to the inner wall of the cover sleeve, and the inner diameter of the penetration matches the outer diameter of the insertion section.

[0015] In this solution, the connecting shaft forms a threaded connection at the cover sleeve, which is separated from the connection of the connecting ear, and is connected at both ends of the extended section, so that the fixing area is dispersed to prevent the aggregated fixing structure from breaking together.

[0016] In the above-mentioned inserted ball head pull rod, arc-shaped abutment grooves are opened on both sides of the bottom of the ball seat, and the abutment grooves match the shape of the outer wall of the extension section.

[0017] Since the outer wall of the extending section is arc-shaped, the bottom of the ball seat can be placed stably through the abutment groove with matching shape.

[0018] In the above-mentioned inserted ball head pull rod, the top of the cover has a protruding limit column, and the extending section has a matching limit groove. When the limit column is inserted into the limit groove, the circumferential movement and axial movement of the connecting shaft are restricted.

[0019] After the limit post and the limit groove cooperate, the connecting shaft cannot rotate or move forward and backward, so the connecting shaft can still be tightly fixed under the action of vibration force. The cover is connected in the same way as the traditional cover, and the edge of the cover is pressed into the bottom of the shell to achieve fixation, and the limit post and the limit groove are matched after pressing.

[0020] In the above-mentioned through-type ball head tie rod, the cover sleeve and the shell are an integrated structure.

[0021] In practice, the cover sleeve and the shell can also be connected by welding.

[0022] In the above-mentioned through-type ball head pull rod, the connecting ear is welded to the connecting shaft.

[0023] Compared with the existing technology, the interlaced ball head pull rod has the following advantages:

[0024] 1. The inserted ball head pull rod is provided with an extending section on the connecting shaft, so that the force on the ball head is changed from point force to segment force, thus achieving stress sharing and greatly reducing the fracture and deformation of the connection.

[0025] 2. The through-type ball head pull rod covers the through-hole through the design of the connecting ear, thereby achieving the functions of dust prevention and enhancing the connection strength.

[0026] 3. The interlaced ball head pull rod has an anti-loosening structure. Through the cooperation of the limit column and the limit groove, the connecting shaft cannot rotate and move forward and backward. Therefore, under the action of vibration force, the connecting shaft can still be tightly fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural sectional view of the interlaced ball head pull rod.

[0028] Figure 2 yes Figure 1 A magnified view of the structure in area A.

[0029] Figure 3 It is a side view of a ball seat in the interlaced ball head pull rod.

[0030] List of Reference Numerals

[0031] In the figure:

[0032] 1. Shell;

[0033] 1a, extension section;

[0034] 1a1, piercing;

[0035] 1a2, cover;

[0036] 1a3, matching groove;

[0037] 2. Tee;

[0038] 2a, abutment groove;

[0039] 3. Capping;

[0040] 3a, limit column;

[0041] 4. Ball pin;

[0042] 5. Connecting shaft;

[0043] 5a, extension section;

[0044] 5a1, limit slot;

[0045] 5b. Connect the ears. DETAILED DESCRIPTION

[0046] like Figures 1 to 3As shown, the inserted ball head pull rod comprises a housing 1, a ball seat 2, a cover 3, a ball pin 4 and a connecting shaft 5. The lower end of the housing 1 extends downward to form an extension section 1a. A through hole 1a1 is provided on one side of the extension section 1a. A hollow cover sleeve 1a2 protruding outward is provided on the other side of the extension section 1a. The connecting shaft 5 has an insertion section 5a. The inner end of the insertion section 5a penetrates the housing 1 from the through hole 1a1 and enters the cover sleeve 1a2. Relative to the housing 1, the connecting shaft 5 is axially fixed and sealed. The bottom of the ball seat 2 abuts against the insertion section 5a to achieve position limiting. The outer wall of the connecting shaft 5 has a round cover-shaped connecting ear 5b. The connecting ear 5b is axially fixed to the extension section 1a, and the connecting ear 5b covers the outer end of the through hole 1a1. The housing 1 is open at the top and bottom and the cover 3 is fixed at the bottom. The ball seat 2 is located in the housing 1. The bottom of the ball pin 4 abuts against the ball seat 2, and the top of the ball pin 4 protrudes from the upper end of the housing 1. The extension section 1a realizes the extension of the shell 1 and provides installation space for the connecting shaft 5. This solution is different from the traditional welding method of the connecting shaft 5, and adopts the insertion and built-in method to realize installation. Specifically, the insertion section 5a in the connecting shaft 5 extends from the through-hole 1a1 into the shell 1 and enters the cover sleeve 1a2. The connecting shaft 5 is axially fixed and relatively sealed with the shell 1 to prevent loosening and dust from entering. The function of the cover sleeve 1a2 is to realize the positioning of the inner end of the insertion section 5a and extend the insertion length of the insertion section 5a, thereby increasing the connection strength. For the ball seat 2, the traditional ball seat 2 is fixed against the cover 3. In this case, the bottom of the ball seat 2 is fixed by abutting against the insertion section 5a. The ball on the ball pin 4 is located in the ball seat 2, and the shaft of the ball pin 4 extends from the upper end of the shell 1. By setting the extension section 5a on the connecting shaft 5, the original point fixation (welding point) is transformed into a segment fixation. When the extension section 5a enters the housing 1, the ball head is no longer stressed at the point, but at the segment, which achieves stress sharing and can greatly reduce the fracture and deformation of the connection. In addition, the connecting ear 5b is located outside the extension section 5a on the connecting shaft 5. After the extension section 5a is fixed, the connecting ear 5b is also fixed. The position is at the outer end of the through-hole 1a1. After the connecting ear 5b is fixed, the through-hole 1a1 is covered to achieve dustproof. Another function of the connecting ear 5b is to enhance the connection strength. When the ball head connecting rod generates stress, the connecting ear 5b is the first line of defense, and it resists the stress together with the extension section 5a, which greatly enhances the connection strength of the connecting shaft 5. Even if the connection of the connecting ear 5b is broken, the connection function of the extension section 5a can still support the connecting shaft 5. The design is ingenious.

[0047] A matching groove 1a3 is provided on the outer wall of the shell 1, and the connecting ear 5b is threadedly connected to the matching groove 1a3. When the connecting shaft 5 is rotated, the connecting ear 5b forms a threaded connection with the matching groove 1a3. The cover sleeve 1a2 is cylindrical. The insertion section 5a is cylindrical, and its shape matches the cover sleeve 1a2. The through-hole 1a1 has an internal thread, and the connecting shaft 5 has a matching external thread. In this scheme, the connecting shaft 5 is connected to the shell 1 at the through-hole 1a1, and this connection is at the same position as the connection of the connecting ear 5b, and the regional connection force formed here is relatively strong. The inner end outer diameter of the insertion section 5a matches the inner diameter of the cover sleeve 1a2. The inner end of the insertion section 5a is threadedly connected to the inner wall of the cover sleeve 1a2, and the inner diameter of the through-hole 1a1 matches the outer diameter of the insertion section 5a. In this scheme, the connecting shaft 5 forms a threaded connection at the cover sleeve 1a2, and this connection is separated from the connection of the connecting ear 5b, and a connection is formed at both ends of the extension section 5a, so that the fixed area is dispersed to prevent the aggregated fixed structure from breaking together. The bottom of the ball seat 2 is provided with arc-shaped abutment grooves 2a on both sides, and the abutment grooves 2a match the shape of the outer wall of the extension section 5a. Since the outer wall of the extension section 5a is arc-shaped, the bottom of the ball seat 2 is placed stably through the shape-matched abutment grooves 2a. The top of the cover 3 has a protruding limit column 3a, and the extension section 5a has a matching limit groove 5a1. When the limit column 3a is inserted into the limit groove 5a1, the circumferential movement and axial movement of the connecting shaft 5 are limited. After the limit column 3a and the limit groove 5a1 are matched, the connecting shaft 5 cannot rotate and move forward and backward, so under the action of vibration force, the connecting shaft 5 can still be tightly fixed. The connection method of the cover 3 is the same as that of the conventional cover 3. The edge of the cover 3 is pressed into the bottom of the shell 1 to fix it. After being pressed in, the limit column 3a and the limit groove 5a1 are matched. The cover sleeve 1a2 and the shell 1 are an integrated structure. In practice, the cover sleeve 1a2 and the shell 1 can also be connected by welding. The connecting ear 5b is welded to the connecting shaft 5.

[0048] 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.

[0049] 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 interlaced ball head pull rod, comprising a housing, a ball seat, a cover, a ball pin and a connecting shaft, characterized in that: The lower end of the shell extends downward to form an extension section, a through opening is formed on one side of the extension section, and a hollow cover sleeve protruding outward is provided on the other side of the extension section. The connecting shaft is provided with an insertion section, and the inner end of the insertion section penetrates into the shell from the through opening and enters into the cover sleeve. Relative to the shell, the connecting shaft is axially fixed and sealed, and the bottom of the ball seat abuts against the insertion section to achieve positioning. A round cover-shaped connecting ear is provided on the outer wall of the connecting shaft, and the connecting ear is axially fixed to the extension section, and the connecting ear covers the outer end of the through opening.

2. The through-type ball head tie rod according to claim 1, characterized in that: A matching groove is provided on the outer wall of the shell, and the connecting ear is threadedly connected to the matching groove.

3. The through-type ball head tie rod according to claim 1, characterized in that: The cover sleeve is cylindrical.

4. The through-type ball head tie rod according to claim 2, characterized in that: The through opening has an internal thread, and the connecting shaft has a matching external thread.

5. The through-type ball head tie rod according to claim 4, characterized in that: The outer diameter of the inner end of the extending section matches the inner diameter of the cover sleeve.

6. The through-type ball head tie rod according to claim 2, characterized in that: The inner end of the insertion section is threadedly connected to the inner wall of the cover sleeve, and the inner diameter of the through opening matches the outer diameter of the insertion section.

7. The through-type ball head tie rod according to claim 1, characterized in that: Arc-shaped abutment grooves are provided on both sides of the bottom of the ball seat, and the abutment grooves match the shape of the outer wall of the extending section.

8. The through-type ball head tie rod according to claim 1, characterized in that: The top of the cover is provided with a protruding limiting column, and the extending section is provided with a matching limiting groove. When the limiting column is inserted into the limiting groove, the circumferential movement and axial movement of the connecting shaft are restricted.

9. The through-type ball head tie rod according to claim 1, characterized in that: The cover sleeve and the shell are an integrated structure.

10. The through-type ball head tie rod according to claim 1, characterized in that: The connecting ear is welded on the connecting shaft.

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