Automobile front suspension structure

Abstract

The utility model discloses a kind of automobile front suspension structure, it is related to automobile front suspension technical field, including two shock absorber assemblies, two lower swing arms and direction machine assembly, two The shock absorber assembly includes coil spring and shock absorber, the coil spring is installed on shock absorber, and shock absorber is connected with tire assembly, two The lower swing arm is connected with tire assembly, the direction machine assembly both ends are connected with shock absorber by connecting assembly, The connecting assembly includes first connecting rod, second connecting rod, ball head and bushing, the bushing side is connected with first connecting rod, The ball head is rotatably connected in bushing, sealing assembly is equipped on the bushing, and lubricating assembly is equipped on ball head;The utility model sets sealing assembly on the bushing of connecting assembly, can effectively enhance the sealing performance of ball head and bushing connecting part, sets lubricating assembly on ball head, can provide sustained and effective lubrication supplement for the friction surface of ball head and bushing.

Description

Technical Field

[0001] This utility model relates to the field of automotive front suspension technology, specifically to an automotive front suspension structure. Background Technology

[0002] The front suspension structure is a core component of a vehicle's driving system, and its performance directly affects the vehicle's handling stability, ride comfort, and driving safety. With the rapid development of the automotive industry, users' demands for vehicle driving quality are constantly increasing, posing greater challenges to the design of the front suspension structure.

[0003] Referring to the existing Chinese patent with publication number CN222136387U, a MacPherson front suspension structure is disclosed, which belongs to the field of automotive chassis platform technology, including a steering gear assembly, a shock absorber assembly, a tire assembly, a lower control arm assembly, a front axle adapter welding assembly, and a drum brake assembly.

[0004] The aforementioned MacPherson strut front suspension structure features a compact, space-saving design in the width direction for both the shock absorber assembly and drum brake assembly, making it suitable for front MacPherson strut suspensions in vehicles with limited width. The ball joints of the shock absorber assembly and lower control arm assembly are aligned, and the suspension kingpin centerline coincides with the shock absorber assembly's rotation centerline, reducing the resistance torque received during shock absorber assembly rotation and extending its lifespan. The drum brake assembly has a smaller outer diameter than disc brakes, making it more suitable for smaller vehicles. However, this MacPherson strut front suspension structure still has some drawbacks. For example, the ball joint and bushing at the connection point are critical friction pairs, and their lubrication and sealing performance are crucial. In traditional structures, ball joint lubrication relies heavily on the initial grease application, lacking a continuous and effective lubrication replenishment mechanism. Furthermore, the simple design of the sealing components makes them susceptible to increased wear due to dust and mud intrusion, shortening component lifespan and potentially causing abnormal noises, jamming, and even affecting steering safety in severe cases. Utility Model Content

[0005] The purpose of this invention is to provide a front suspension structure for automobiles to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A front suspension structure for automobiles, comprising: Two shock absorption assemblies, each comprising a coil spring and a shock absorber, the coil spring being mounted on the shock absorber and the shock absorber being connected to the tire assembly; Two lower control arms, which are connected to the tire assembly; A steering gear assembly, wherein both ends of the steering gear assembly are connected to a shock absorber via a connecting assembly, the connecting assembly including a first connecting rod, a second connecting rod, a ball joint and a bushing, one side of the bushing being connected to the first connecting rod, the ball joint being rotatably connected inside the bushing, the bushing being provided with a sealing assembly, and the ball joint being provided with a lubrication assembly.

[0007] Preferably, the ball head surface is provided with a metal-ceramic coating, and the bushing is a PA66 and glass fiber composite material.

[0008] Preferably, the equatorial surface of the bushing is provided with a plurality of annular oil reservoirs, and the plurality of annular oil reservoirs are filled with polyurea-based grease.

[0009] Preferably, the sealing assembly includes a mounting ring, a rubber sealing cover, and a dust cover. The mounting ring is fixedly mounted on the bushing, the rubber sealing cover is connected to the mounting ring, and the dust cover is sleeved on the outside of the rubber sealing cover. The rubber sealing cover and the dust cover are fixedly connected to the mounting ring by a clamp.

[0010] Preferably, the sealing assembly further includes an expansion sealing strip, and the end of the bushing away from the mounting ring has an installation groove, in which the expansion sealing strip is installed.

[0011] Preferably, the lubrication assembly includes a piston rod and a return spring. An oil reservoir is formed inside the ball head, and oil passages are connected to both sides of the oil reservoir. One end of the piston rod is slidably connected to the oil reservoir, and the other end of the piston rod is connected to a second connecting rod. A connecting groove is formed on the ball head. The return spring is sleeved on the outside of the piston rod, with one end connected to the connecting groove and the other end connected to the second connecting rod. The oil reservoir is filled with polyurea-based grease.

[0012] Preferably, an eddy current displacement sensor is mounted on the bushing, and the axis of the eddy current displacement sensor is parallel to the axis of the ball head.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention, by incorporating a sealing component on the bushing of the connecting assembly, effectively enhances the sealing performance of the connection between the ball joint and the bushing, reducing the intrusion of dust, mud, and other impurities into the friction pair, lowering the risk of wear caused by foreign objects, extending the service life of the ball joint and bushing, and preventing problems such as abnormal noise and jamming, thereby improving steering safety. Furthermore, this invention incorporates a lubrication component on the ball joint, overcoming the limitations of traditional structures that rely solely on initial grease. This provides continuous and effective lubrication to the friction surfaces of the ball joint and bushing, ensuring good lubrication during long-term use, reducing the coefficient of friction, minimizing wear, further improving the reliability and durability of the connecting assembly, and guaranteeing the stable operation of the suspension structure. Attached Figure Description Figure 1 This is a schematic front view of a front suspension structure for an automobile according to an embodiment of this application; Figure 2 This is a schematic diagram of the connection component structure of a car front suspension structure according to an embodiment of this application; Figure 3 This is a cross-sectional view of a connecting component of a front suspension structure for automobiles, as described in an embodiment of this application. Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0014] In the diagram: 1. Coil spring; 2. Shock absorber; 3. Tire assembly; 4. Lower control arm; 5. Steering gear assembly; 6. First connecting rod; 7. Second connecting rod; 8. Ball joint; 9. Bushing; 10. Metal-ceramic coating; 11. Annular oil reservoir; 12. Mounting ring; 13. Rubber sealing cover; 14. Dust cover; 15. Clamp; 16. Expansion water-stop strip; 17. Mounting groove; 18. Piston rod; 19. Return spring; 20. Oil reservoir; 21. Oil passage; 22. Connecting groove; 23. Eddy current displacement sensor. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4 This utility model provides a technical solution: A front suspension structure for automobiles, comprising: Two shock absorber assemblies, each including a coil spring 1 and a shock absorber 2, wherein the coil spring 1 is mounted on the shock absorber 2 and the shock absorber 2 is connected to the tire assembly 3; Two lower control arms 4 are connected to the tire assembly 3; The steering gear assembly 5 is connected to the shock absorber 2 at both ends via connecting components. The connecting components include a first connecting rod 6, a second connecting rod 7, a ball joint 8, and a bushing 9. One side of the bushing 9 is connected to the first connecting rod 6. The ball joint 8 is rotatably connected within the bushing 9. The equatorial surface of the bushing 9 has several annular oil reservoirs 11 filled with polyurea-based grease. The bushing 9 is equipped with a sealing component, and the ball joint 8 is equipped with a lubrication component, which includes a piston rod. The piston rod 18 and the return spring 19 are provided. The ball head 8 has an oil reservoir 20. The oil reservoir 20 is connected to the oil passages 21 on both sides. One end of the piston rod 18 is slidably connected in the oil reservoir 20. The other end of the piston rod 18 is connected to the second connecting rod 7. The ball head 8 has a connecting groove 22. The return spring 19 is sleeved on the outside of the piston rod 18. One end of the return spring 19 is connected in the connecting groove 22, and the other end of the return spring 19 is connected to the second connecting rod 7. The oil reservoir 20 is filled with polyurea grease.

[0017] Furthermore, the ball head 8 has a metal-ceramic coating 10 on its surface, the bushing 9 is made of PA66 and glass fiber composite material, and an eddy current displacement sensor 23 is installed on the bushing 9, with the axis of the eddy current displacement sensor 23 parallel to the axis of the ball head 8.

[0018] During assembly, polyurea-based grease is first filled into the annular oil reservoir 11 on the equatorial surface of the bushing 9 and the oil reservoir 20 inside the ball head 8, ensuring that the lubricating medium fully covers the contact area of ​​the friction pair. Then, the ball head 8 is rotated and installed inside the bushing 9, so that the metal-ceramic coating 10 on the surface of the ball head 8 forms a friction fit with the bushing 9 (PA66 and glass fiber composite material). The metal-ceramic coating 10 on the surface of the ball head 8 is prepared using a "plasma spraying + laser remelting" process. Simultaneously, one end of the piston rod 18 is slid into the oil reservoir 20, and the other end is connected to the second connecting rod 7. The return spring 19 is sleeved on the outside of the piston rod 18 and fixed between the connecting groove 22 and the second connecting rod 7. During maintenance, the eddy current displacement sensor 23 monitors the wear of the ball head 8 and the bushing 9 in real time. When the wear exceeds 0.3 mm, an ECU warning is triggered, and a "suspension maintenance" prompt is displayed on the instrument panel. Seal failure monitoring prompts for inspection or replacement of components. In this process, the polyurea-based grease in the annular oil reservoir 11 of the bushing 9 continuously penetrates to the friction surface through the relative rotation of the ball head 8 and the bushing 9, forming a base oil film. The grease in the oil reservoir 20 of the ball head 8 is replenished to the friction surface through the oil passage 21. When the vehicle turns or bumps, the second connecting rod 7 drives the piston rod 18 to slide in the oil reservoir 20, compressing the volume of the oil reservoir 20, so that the grease is quantitatively squeezed out to the friction surface through the oil passage 21. After the force disappears, the return spring 19 pushes the piston rod 18 to return to its original position, realizing the dynamic linkage of "movement-grease replenishment".

[0019] Specifically, the sealing assembly includes an mounting ring 12, a rubber sealing cover 13, and a dust cover 14. The mounting ring 12 is fixedly mounted on the bushing 9. The rubber sealing cover 13 is connected to the mounting ring 12, and the dust cover 14 is sleeved on the outside of the rubber sealing cover 13. The rubber sealing cover 13 and the dust cover 14 are fixedly connected to the mounting ring 12 by a clamp 15. The sealing assembly also includes an expansion water-stop strip 16. An installation groove 17 is provided at the end of the bushing 9 away from the mounting ring 12, and the expansion water-stop strip 16 is installed in the installation groove 17.

[0020] Next, install the sealing assembly. Fix the mounting ring 12 onto the bushing 9, connect the rubber sealing cover 13 and the dust cover 14 in sequence, and tighten them with the clamp 15. Embed the expansion water-stop strip 16 in the mounting groove 17 at the end of the bushing 9 away from the mounting ring 12 to complete the overall seal. Finally, connect the first connecting rod 6 and the second connecting rod 7 of the connecting assembly to the steering gear assembly 5 and the shock absorber 2 respectively to complete the overall assembly. The rubber sealing cover 13 and the dust cover 14 are tightly fitted to the mounting ring 12 through the clamp 15 to prevent external dust and mud from directly intruding into the friction pair. The expansion water-stop strip 16 automatically expands when it comes into contact with water to fill the tiny gap between the bushing 9 and the ball head 8, forming a secondary seal.

[0021] It should be noted that the specific model and specifications of the eddy current displacement sensor 23 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A front suspension structure for automobiles, characterized in that, include: Two shock absorption assemblies, each comprising a helical spring (1) and a shock absorber (2), wherein the helical spring (1) is mounted on the shock absorber (2) and the shock absorber (2) is connected to the tire assembly (3); Two lower control arms (4), the two lower control arms (4) are connected to the tire assembly (3); The steering gear assembly (5) is connected to the shock absorber (2) at both ends through a connecting assembly. The connecting assembly includes a first connecting rod (6), a second connecting rod (7), a ball head (8), and a bushing (9). One side of the bushing (9) is connected to the first connecting rod (6). The ball head (8) is rotatably connected inside the bushing (9). The bushing (9) is provided with a sealing assembly, and the ball head (8) is provided with a lubrication assembly.

2. The automotive front suspension structure according to claim 1, characterized in that: The ball head (8) has a metal ceramic coating (10) on its surface, and the bushing (9) is a composite material of PA66 and glass fiber.

3. The automotive front suspension structure according to claim 1, characterized in that: The bushing (9) has several annular oil reservoirs (11) on its equatorial surface, and the several annular oil reservoirs (11) are filled with polyurea-based grease.

4. The automotive front suspension structure according to claim 1, characterized in that: The sealing assembly includes a mounting ring (12), a rubber sealing cover (13), and a dust cover (14). The mounting ring (12) is fixedly mounted on the bushing (9). The rubber sealing cover (13) is connected to the mounting ring (12), and the dust cover (14) is sleeved on the outside of the rubber sealing cover (13). The rubber sealing cover (13) and the dust cover (14) are fixedly connected to the mounting ring (12) by a clamp (15).

5. The automotive front suspension structure according to claim 4, characterized in that: The sealing assembly also includes an expansion water-stop strip (16), and the bushing (9) has an installation groove (17) at the end away from the mounting ring (12), and the expansion water-stop strip (16) is installed in the installation groove (17).

6. The automotive front suspension structure according to claim 1, characterized in that: The lubrication assembly includes a piston rod (18) and a return spring (19). An oil reservoir (20) is provided in the ball head (8). Oil passages (21) are connected to both sides of the oil reservoir (20). One end of the piston rod (18) is slidably connected in the oil reservoir (20). The other end of the piston rod (18) is connected to the second connecting rod (7). A connecting groove (22) is provided on the ball head (8). The return spring (19) is sleeved on the outside of the piston rod (18). One end of the return spring (19) is connected in the connecting groove (22), and the other end of the return spring (19) is connected to the second connecting rod (7). The oil reservoir (20) is filled with polyurea grease.

7. The automotive front suspension structure according to claim 1, characterized in that: An eddy current displacement sensor (23) is installed on the bushing (9), and the axis of the eddy current displacement sensor (23) is parallel to the axis of the ball head (8).

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