Control arm connecting structure and vehicle

Abstract

The utility model provides a control arm connecting structure and a vehicle, the control arm connecting structure comprises a steering knuckle and a control arm, the steering knuckle comprises a first assembling part, the control arm comprises a second assembling part, one of the first assembling part and the second assembling part comprises a first assembling plate and a second assembling plate which are arranged at an interval, and the other one comprises a clamping end; a bolt and a nut are further included; the screw rod comprises a first section, the first section comprises a plurality of hobbing teeth arranged on the circumferential outer surface of the screw rod body, and the hobbing teeth are in interference fit with the third assembly hole. The structure of the bolt is optimized, the hobbing is arranged at the root of the bolt, so that the radial size of the first section is larger, and the hobbing is embedded into the first assembly hole and is in interference fit with the first assembly hole; in this way, the possible dislocation risk in the vehicle running process can be effectively prevented, the possible change of four-wheel parameters caused by dislocation of the connecting position of the control arm and the steering knuckle is avoided, and then a series of problems such as deviation and tire abrasion in the vehicle using process are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle components, specifically to a control arm connection structure, and also to a vehicle including the control arm connection structure. Background Art

[0002] In the vehicle's traditional rear multi-link independent suspension, the rear control arm is placed in the connecting bracket of the rear steering knuckle and is locked and fixed with ordinary bolts and nuts to achieve the connection between the rear control arm and the rear steering knuckle, preventing the rear upper control arm and the rear steering knuckle from moving displaced at the connection between the two during vehicle driving.

[0003] However, the screw rod of an ordinary bolt and the steering knuckle have a clearance fit, which can easily lead to the connection point between the rear control arm and the rear steering knuckle being dislocated, causing changes in the four-wheel alignment parameters of the rear suspension, thereby affecting the stability of the vehicle and even causing problems such as vehicle deviation and tire wear, resulting in a poor driving experience and seriously affecting the vehicle's driving safety. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a control arm connection structure, which solves the problem of misalignment of the connection point between the control arm and the rear steering knuckle.

[0005] Another object of the present application is to provide a vehicle comprising the above-mentioned heat exchange device.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A control arm connection structure includes a steering knuckle and a control arm, the steering knuckle including a first assembly portion, the control arm including a second assembly portion, one of the first assembly portion and the second assembly portion including a first assembly plate and a second assembly plate arranged at intervals, and the other including a clamping end assembled between the first assembly plate and the second assembly plate; the first assembly plate having a first assembly hole, the second assembly plate having a second assembly hole, and the clamping end having a third assembly hole.

[0008] The control arm connection structure further includes a bolt and a nut, wherein the screw of the bolt passes through the first assembly hole, the third assembly hole, and the second assembly hole in sequence, and is locked and fixed by the nut to fixedly connect the steering knuckle and the control arm;

[0009] The screw includes a first section close to the bolt head of the bolt, the first section includes a screw body and a plurality of rolling teeth arranged on the circumferential outer surface of the screw body, and the plurality of rolling teeth are interference fit with the third assembly hole.

[0010] Optionally, in the above control arm connection structure,

[0011] Along the axial direction of the first section, the extension length of the hobbing is the same as the length of the first section;

[0012] and / or,

[0013] Along the radial direction of the first section, the height of the hobbing teeth is 0.2 mm-0.6 mm.

[0014] Optionally, in the above control arm connection structure, the first section includes an excess area that exceeds the first assembly hole and is located at the third assembly hole, and the excess area is clearance-matched with the third assembly hole.

[0015] Optionally, in the above control arm connection structure,

[0016] Along the axial direction of the first section, the length of the excess area is greater than or equal to 5 mm;

[0017] and / or,

[0018] Along the circumference of the first section, a fitting clearance between the excess area and the third assembly hole is 0.1 mm-0.2 mm.

[0019] Optionally, in the above-mentioned control arm connection structure, the screw includes a third section threadedly connected to the nut, a second section is connected between the third section and the first section, and an outer diameter of the second section is greater than or equal to the outer diameter of the tooth base circle of the hobbing gear and smaller than the outer diameter of the tooth tip circle of the hobbing gear;

[0020] and / or,

[0021] The end of the screw rod away from the bolt head is the fourth section, and from the direction close to the bolt head to the direction away from the bolt head, the outer surface of the fourth section is inclined toward the direction close to the center line of the fourth section.

[0022] Optionally, in the above control arm connection structure,

[0023] The inclination angle of the outer surface of the fourth section of the screw is 30°-60°;

[0024] and / or,

[0025] Along the axial direction of the screw, the length of the fourth section is 2 mm to 5 mm.

[0026] Optionally, in the above-mentioned control arm connection structure, the bolt head is a circular flange, and the surface of the circular flange close to the screw is an inclined surface, and from the center of the circular flange to the outer peripheral edge of the circular flange, the inclined surface is inclined toward the side where the screw is located.

[0027] Optionally, in the above-mentioned control arm connection structure, the inclination angle of the inclined surface is 0.25°-1.25°.

[0028] Optionally, in the above control arm connection structure,

[0029] A gasket is provided between the bolt head and the first assembly plate;

[0030] and / or,

[0031] A bushing is sleeved in the third assembly hole, and the bushing includes a metal inner tube and a metal outer tube sleeved together, and a rubber body arranged between the metal inner tube and the metal outer tube;

[0032] and / or,

[0033] A bushing is sleeved in the third assembly hole, and an end surface of the bushing close to the steering knuckle is provided with anti-slip teeth.

[0034] A vehicle comprises the control arm connection structure as described above.

[0035] In the control arm connection structure and vehicle of the present application, the structure of the bolt is optimized, and a hobbing structure is set at its root, so that the radial dimension of the first section is larger, and the hobbing is embedded in the first assembly hole of the first assembly plate and has an interference fit with the first assembly hole; as above, an interference fit between the bolt and the steering knuckle is achieved, which can effectively prevent the risk of misalignment that may occur during vehicle driving, thereby fundamentally preventing the design risk caused by the clearance fit between traditional bolts and steering knuckles, thereby avoiding possible changes in the four-wheel parameters caused by the misalignment of the connection between the control arm and the steering knuckle, and thus avoiding a series of problems such as running off the track and tire wear that occur during vehicle use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0037] Figure 1 The control arm connection structure of the embodiment of the present application;

[0038] Figure 2 This is a control arm connection structure from another angle of an embodiment of the present application;

[0039] Figure 3 This is a schematic structural diagram of a control arm according to an embodiment of the present application;

[0040] Figure 4 This is a schematic structural diagram of a bolt according to an embodiment of the present application.

[0041] superior Figure 1-4 middle:

[0042] 1. Steering knuckle; 2. Control arm; 3. First assembly plate; 4. Second assembly plate; 5. Clamping end; 6. Bolt; 7. Nut; 8. Washer; 9. Bushing; 10. Rear lower control arm; 11. Rear wishbone;

[0043] 61. Screw; 62. Bolt head;

[0044] 611, first paragraph; 612, second paragraph; 613, third paragraph; 614, fourth paragraph. DETAILED DESCRIPTION

[0045] The present application provides a control arm connection structure and a vehicle.

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] like Figures 1-4 As shown, an embodiment of the present application provides a control arm connection structure, comprising a steering knuckle 1 and a control arm 2. The steering knuckle 1 includes a first assembly portion, and the control arm 2 includes a second assembly portion. One of the first and second assembly portions includes a first assembly plate 3 and a second assembly plate 4 arranged in a spaced relationship, and the other includes a clamping end 5 assembled between the first and second assembly plates 3 and 4. The first assembly plate 3 defines a first assembly hole, the second assembly plate 4 defines a second assembly hole, and the clamping end 5 defines a third assembly hole. The control arm connection structure also includes a bolt 6 and a nut 7. The bolt 6 includes a bolt head 62 and a screw 61 connected to the bolt head 62. The screw 61 passes through the first, third, and second assembly holes, respectively, and is tightened and secured by the nut 7 to securely connect the steering knuckle 1 and the control arm 2. The screw 61 includes a first section 611 proximate the bolt head 62. The first section 611 includes a screw body and a plurality of hobbed teeth disposed on the circumferential outer surface of the screw body. The plurality of hobbed teeth form an interference fit with the third assembly hole.

[0048] It should be noted that the shape of the hobbed teeth is similar to that of the meshing teeth on a gear, with a tooth base circle and a tooth tip circle. Along the circumference of the screw body, the tooth base circles of the multiple hobbed teeth can be arranged sequentially without spacing or with regular spacing. Nut 7 is a hexagonal flange nut with a grade 10 strength to ensure its strength meets the requirements when tightened.

[0049] The control arm connection structure of the present application can be used to install the front control arm and the front steering knuckle, and can also be used to install the rear control arm and the rear steering knuckle; the control arm 2 can be the rear upper control arm or the rear lower control arm. The rear steering knuckle is an important connection conversion mechanism that connects the inside and opens the outside in the rear multi-link independent suspension, and plays the role of transmitting force and torque; the inner mounting point of the rear steering knuckle is connected to the rear upper control arm, the rear lower control arm 10, the rear transverse arm 11, and the rear trailing arm, realizing the connection conversion between the inner and outer parts of the rear multi-link independent suspension; the outer mounting point of the rear steering knuckle 5 is connected to the rear wheel hub bearing and the rear brake caliper, and the rear wheel hub unit including the rear wheel hub bearing is connected to the wheel, converting the movement of the inner side of the rear multi-link independent suspension into the up and down bounce of the wheel.

[0050] Preferably, the first assembly portion of the steering knuckle 1 includes a first assembly plate 3 and a second assembly plate 4 arranged in a spaced relationship. The second assembly portion of the control arm 2 includes a clamping end 5 located near the steering knuckle 1. The first assembly plate 3 and the second assembly plate 4 form a connecting bracket structure for mounting the clamping end 5. The first assembly portion of the steering knuckle 1 is constructed of aluminum, while the second assembly portion of the control arm 2 is constructed of steel.

[0051] The screw 61 includes a first section 611 near the bolt head 62, and the first section 611 is the root of the screw 61. The present application optimizes the structure of the bolt 6 by providing a hobbing structure at its root, thereby making the radial dimension of the first section 611 larger, and the hobbing is embedded in the first assembly hole of the first assembly plate 3 and interference fits with the first assembly hole. As described above, an interference fit between the bolt 6 and the steering knuckle 1 is achieved. The interference fit between the bolt 6 and the steering knuckle 1 can effectively prevent the risk of misalignment that may occur during vehicle driving, thereby fundamentally preventing the design risks caused by the clearance fit between the traditional bolt and the steering knuckle 1, thereby avoiding the possible changes in the four-wheel parameters caused by the misalignment of the connection between the control arm 2 and the steering knuckle 1, and thus avoiding a series of problems such as deviation and tire wear that occur during vehicle use.

[0052] Furthermore, the structure of setting the hobbing on the bolt 6 is simple, which not only completely avoids the possibility of misalignment between the control arm 2 and the steering knuckle 1 from the structural design perspective, reduces the difficulty of the anti-misalignment design at the connection between the control arm 2 and the steering knuckle 1, and improves the connection reliability, but also reduces the investment cost of design and production, and improves the economic benefits.

[0053] In some embodiments of the present application, along the axial direction of the first section 611 , the extension length of the hobbing is the same as the length of the first section 611 . It should be noted that the axial direction of the first section 611 is the same as the axial direction of the screw 61 .

[0054] As described above, the number of hobbing teeth arranged along the axial direction of the bolt 6 can be reduced, the processing and forming process of the bolt 6 can be simplified, and production and processing can be facilitated.

[0055] In some parallel embodiments, the extension length of the hobbing teeth along the axial direction of the first section 611 is less than the length of the first section 611 , that is, multiple hobbing teeth can be arranged in sequence without intervals along the axial direction of the first section 611 , or multiple hobbing teeth can be arranged in sequence with intervals.

[0056] In some embodiments, the height of the hobbing teeth along the radial direction of the first section 611 is 0.2 mm-0.6 mm; for example, the height of the hobbing teeth can be any one of 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, etc.

[0057] Limiting the hobbing height to the above range can ensure interference fit between the hobbing and the first assembly hole in the first assembly plate of the steering knuckle 1, while preventing the hobbing height from being too large to affect assembly of the two and increase assembly difficulty.

[0058] In certain embodiments of the present application, the first section 611 includes an excess area that exceeds the first assembly hole and is located at the third assembly hole, and the excess area is clearance-matched with the third assembly hole.

[0059] It should be noted that the first assembly plate 3 and the second assembly plate 4 of the steering knuckle 1 are made of aluminum structures, which have a certain degree of ductility and deformability, and are convenient for interference fit with the hobbing of the first section 611; and the clamping end 5 of the control arm 2 is a steel structure, which is a relatively hard material, so it needs to be clearance-fitted with the excess area of ​​the first section 611, so as to facilitate the installation and assembly of the entire bolt 6.

[0060] The first section 611 is lengthened and has a certain length of excess area to ensure that the first section 611 has sufficient interference fit with the first assembly hole of the steering knuckle 1. The hobbing has an interference fit with it along the entire axial direction of the first assembly hole, thereby ensuring the assembly strength and reliability of the two.

[0061] In certain embodiments of the present application, along the axial direction of the first segment 611 , the length of the excess area is greater than or equal to 5 mm.

[0062] As described above, it is possible to ensure that the hobbing has a sufficiently long extension length, thereby fully ensuring that the hobbing has an interference fit with the first assembly hole of the steering knuckle 1 along the entire axial direction, ensuring the assembly strength and reliability of the two, while preventing the extension length of the hobbing from being too long, causing waste of processing and material costs.

[0063] In some embodiments, along the circumference of the first section 611 , the fitting clearance between the excess area and the third assembly hole is 0.1 mm-0.2 mm; for example, the fitting clearance can be any one of 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, etc.

[0064] As described above, the small gap assembly relationship between the first section 611 and the third assembly hole in the clamping end 5 of the control arm 2 is satisfied, which facilitates the installation and assembly of the entire bolt 6. The small gap assembly can prevent the control arm 2 and the steering knuckle 1 from moving apart under large external forces, thereby reducing the amount of misalignment between the two and ensuring the reliability of the connection.

[0065] In certain embodiments of the present application, the screw 61 includes a third section 613 threadedly connected to the nut 7, and a second section 612 is connected between the third section 613 and the first section 611. The outer diameter of the second section 612 is greater than or equal to the outer diameter of the bottom circle of the gear hobbing and smaller than the outer diameter of the top circle of the gear hobbing.

[0066] It should be noted that screw 61 comprises a screw body, which is provided with hobbing to form a first section 611, and an externally threaded screw body to form a third section 613. The screw body between the first and third sections 611 and 613 is not further processed to form a second section 612. The second section 612 serves to transmit force. The screw body is typically formed by cold heading. The thread strength grade of the third section 613 is generally required to be 10.9 (the thread strength grade is determined by the force applied to the connection and locking parts) to ensure its locking strength.

[0067] As described above, on the basis of satisfying the interference fit between the first section 611 and the steering knuckle 1 and the threaded connection between the third section 613 and the nut 7, the processing technology of the screw 61 is simplified to the maximum extent, saving processing time and cost.

[0068] In certain embodiments of the present application, the end of the screw 61 away from the bolt head 62 is the fourth section 614, and the outer surface of the fourth section 614 is inclined toward the center line of the fourth section 614 from close to the bolt head 62 to away from the bolt head 62.

[0069] As described above, the outer diameter of the fourth section 614 gradually decreases from close to the bolt head 62 to away from the bolt head 62, forming a frustum-shaped structure; the frustum-shaped fourth section 614 is provided at the tail of the screw rod 61 to facilitate the installation and assembly of the screw rod 61 in the first assembly hole, the second assembly hole, and the third assembly hole, to facilitate the screw rod 61 to accurately locate each assembly hole, to facilitate the guided installation and assembly of the bolt 6, and to prevent problems such as damage to the thread of the bolt 6 and assembly difficulty caused by improper assembly during the assembly process.

[0070] In certain embodiments of the present application, the inclination angle of the outer surface of the fourth section 614 of the screw 61 is 30°-60°; for example, the inclination angle of the fourth section 614 can be any one of 30°, 40°, 45°, 50°, 60°, etc.

[0071] As described above, the frustum shape of the fourth section 614 is controlled within a reasonable range, and the structural strength of the fourth section 614 is not reduced while ensuring the guiding effect.

[0072] Along the axial direction of the screw 61 , the length of the fourth section 614 is 2 mm to 5 mm; for example, the length of the fourth section 614 can be any one of 2 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, etc.

[0073] As described above, the guiding effect of the fourth section 614 can be ensured without making the length of the fourth section 614 too long, thereby preventing waste of processing and materials.

[0074] In certain embodiments of the present application, the bolt head 62 is a circular flange, and the surface of the circular flange close to the screw 61 is an inclined surface, which is inclined toward the side where the screw 61 is located from the center of the circular flange to the outer edge of the circular flange.

[0075] By providing an inclined surface on the circular flange, ① the circular flange can better maintain its position when subjected to external force, reducing loosening caused by vibration or impact, and significantly improving the stability of the entire control arm connection structure; ② the setting of the inclined surface can provide additional friction in a vibration environment to prevent the bolt 6 from loosening and enhance the vibration resistance; ③ by reducing stress concentration and improving the reliability of the connection, the setting of the inclined surface helps to extend the connection service life of the bolt 6; ④ the design of the inclined surface simplifies the installation process of the bolt 6, making the bolt 6 easier to align and evenly stressed, which is convenient for installation and maintenance; ⑤ it is convenient to inspect and replace when necessary, reducing the complexity and cost of maintenance; ⑥ the safety of the connection can be improved to prevent serious accidents caused by connection failure; ⑦ the existence of the inclined surface can change the mechanical properties of the circular flange connection to make it more in line with engineering needs. For example, by adjusting the size of the inclination angle, the change in tensile and compressive stiffness can be controlled to meet specific design and performance requirements.

[0076] Furthermore, the inclination angle of the inclined surface is 0.25°-1.25°; for example, the inclination angle of the inclined surface is any one of 0.25°, 0.5°, 0.75°, 1°, 1.25°, etc.

[0077] As described above, a small positive inclination angle setting of the inclined surface of the circular flange is achieved, so that various properties of the circular flange are adjusted within a relatively appropriate range.

[0078] In certain embodiments of the present application, a gasket 8 is provided between the bolt head 62 and the first assembly plate 3 .

[0079] The gasket 8 is a circular gasket; the gasket 8 is passed through the second section 612 of the screw 61 and cooperates with the mounting surface of the second mounting plate 4 of the steering knuckle 1 away from the first mounting plate 3. When the nut 7 is tightened, the nut 7 cooperates with the gasket 8; when the nut 7 is tightened, the axial force is transmitted to the steering knuckle 1 through the gasket 8, preventing the aluminum steering knuckle 1 from being crushed by the hexagonal flange surface of the nut 7 during assembly, thereby causing problems such as torque attenuation and component damage.

[0080] In certain embodiments of the present application, a bushing 9 is sleeved in the third assembly hole. The bushing 9 includes a metal outer tube and a metal inner tube that are sleeved together, and a rubber body arranged between the metal outer tube and the metal inner tube.

[0081] It should be noted that the clamping end of the control arm 2 includes a first mounting plate and a second mounting plate that are positioned relative to each other. The first mounting plate is provided with a first mounting hole, and the second mounting plate is provided with a second mounting hole. The first mounting hole and the second mounting hole are relatively positioned to form a third assembly hole. The bushing 9 is sequentially inserted into the first mounting hole and the second mounting hole. The metal inner tube and the metal outer tube are fixed, and rubber is vulcanized between the metal outer tube and the metal inner tube, thereby obtaining a rubber body located between the metal inner tube and the metal outer tube, and forming a metal inner tube, a rubber body, and a metal outer tube that are mutually sleeved and fixed. The metal outer tube is pressed into the third assembly hole by an interference fit, thereby forming a control arm assembly composed of the control arm 2 and the bushing 9. Furthermore, the first end of the control arm 2 away from the clamping end 5 is a suspension mounting end, and a suspension assembly hole is provided on the suspension mounting end, and another bushing 9 is assembled in the suspension assembly hole.

[0082] It should be further explained that when the bushing 9 is provided in the third assembly hole, along the circumference of the first section 611 , the fitting clearance between the excess area of ​​the first section 611 and the metal inner tube of the bushing 9 is 0.1 mm-0.2 mm.

[0083] The bushing 9 of the above structure has a certain shock-proof and buffering effect, thereby improving the stability of the assembly between the control arm 2 and the steering knuckle 1 and extending the service life of the control arm 2 .

[0084] Furthermore, the end surface of the bushing 9 near the steering knuckle 1 is provided with an anti-slip tooth structure. The anti-slip tooth is a raised structure formed on the end surface of the bushing 9 near the steering knuckle 1, and the specific shape of the anti-slip tooth is not limited. The anti-slip tooth is formed on the metal inner tube and / or metal outer tube of the bushing 9; preferably, the anti-slip tooth is formed on the metal inner tube of the bushing 9. After the fixing is locked with bolts 6, the anti-slip tooth on the bushing 9 prevents the control arm 2 and the steering knuckle 1 from moving out of alignment.

[0085] In summary, the present application further provides a vehicle, which includes the control arm connection structure as described above.

[0086] Since the vehicle of the present application includes a control arm connection structure, the beneficial effects of the control arm connection structure on the vehicle can be found above and will not be repeated here.

[0087] The basic principles of this application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and should not be construed as necessarily possessed by each embodiment of this application. Furthermore, the specific details disclosed above are provided for illustrative purposes and to facilitate understanding, rather than as limitations. These details do not limit this application to necessarily being implemented using these specific details.

[0088] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0089] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0090] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0091] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0092] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A control arm connection structure, characterized in that: The invention comprises a steering knuckle (1) and a control arm (2), wherein the steering knuckle (1) comprises a first assembly portion, and the control arm (2) comprises a second assembly portion, wherein one of the first assembly portion and the second assembly portion comprises a first assembly plate (3) and a second assembly plate (4) arranged at intervals, and the other comprises a clamping end (5) assembled between the first assembly plate (3) and the second assembly plate (4); the first assembly plate (3) is provided with a first assembly hole, the second assembly plate (4) is provided with a second assembly hole, and the clamping end (5) is provided with a third assembly hole; The control arm connection structure further comprises a bolt (6) and a nut (7), wherein the screw rod (61) of the bolt (6) passes through the first assembly hole, the third assembly hole, and the second assembly hole in sequence, and is locked and fixed by the nut (7) to fixedly connect the steering knuckle (1) and the control arm (2); The screw (61) includes a first section (611) close to the bolt head (62) of the bolt (6), and the first section (611) includes a screw body and a plurality of rolling teeth arranged on the circumferential outer surface of the screw body, and the plurality of rolling teeth are interference fit with the third assembly hole.

2. The control arm connection structure according to claim 1, characterized in that: Along the axial direction of the first section (611), the extension length of the hobbing is the same as the length of the first section (611); and / or, Along the radial direction of the first section (611), the height of the hobbing teeth is 0.2mm-0.6mm.

3. The control arm connection structure according to claim 1, characterized in that: The first section (611) includes an excess area that exceeds the first assembly hole and is located in the third assembly hole, and the excess area is clearance-matched with the third assembly hole.

4. The control arm connection structure according to claim 3, characterized in that: Along the axial direction of the first section (611), the length of the excess area is greater than or equal to 5 mm; and / or, Along the circumference of the first section (611), the fitting clearance between the excess area and the third assembly hole is 0.1mm-0.2mm.

5. The control arm connection structure according to claim 1, characterized in that: The screw (61) includes a third section (613) threadedly connected to the nut (7); a second section (612) is connected between the third section (613) and the first section (611); the outer diameter of the second section (612) is greater than or equal to the outer diameter of the tooth bottom circle of the hobbing gear and smaller than the outer diameter of the tooth top circle of the hobbing gear; and / or, The end of the screw rod (61) away from the bolt head (62) is the fourth section (614), and the outer surface of the fourth section (614) is inclined toward the center line of the fourth section (614) from close to the bolt head (62) to away from the bolt head (62).

6. The control arm connection structure according to claim 5, characterized in that: The outer surface of the fourth section (614) of the screw (61) has an inclination angle of 30°-60°; and / or, Along the axial direction of the screw (61), the length of the fourth section (614) is 2 mm to 5 mm.

7. The control arm connection structure according to claim 1, characterized in that: The bolt head (62) is a circular flange, and a surface of the circular flange close to the screw rod (61) is an inclined surface. From the center of the circular flange to the outer peripheral edge of the circular flange, the inclined surface is inclined toward the side where the screw rod (61) is located.

8. The control arm connection structure according to claim 7, characterized in that: The inclination angle of the inclined surface is 0.25°-1.25°.

9. The control arm connection structure according to any one of claims 1 to 8, characterized in that: A gasket (8) is provided between the bolt head (62) and the first assembly plate (3); and / or, A bushing (9) is sleeved in the third assembly hole, and the bushing (9) comprises a metal inner tube and a metal outer tube sleeved together, and a rubber body arranged between the metal inner tube and the metal outer tube; and / or, A bushing (9) is sleeved in the third assembly hole, and an anti-slip tooth is provided on the end surface of the bushing (9) close to the steering knuckle (1).

10. A vehicle, characterized in that: The invention comprises the control arm connection structure according to any one of claims 1 to 9.

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